dlil.c source code [codebrowser/bsd/net/dlil.c]

1	/*
2	* Copyright (c) 1999-2018 Apple Inc. All rights reserved.
3	*
4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5	*
6	* This file contains Original Code and/or Modifications of Original Code
7	* as defined in and that are subject to the Apple Public Source License
8	* Version 2.0 (the 'License'). You may not use this file except in
9	* compliance with the License. The rights granted to you under the License
10	* may not be used to create, or enable the creation or redistribution of,
11	* unlawful or unlicensed copies of an Apple operating system, or to
12	* circumvent, violate, or enable the circumvention or violation of, any
13	* terms of an Apple operating system software license agreement.
14	*
15	* Please obtain a copy of the License at
16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
17	*
18	* The Original Code and all software distributed under the License are
19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23	* Please see the License for the specific language governing rights and
24	* limitations under the License.
25	*
26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27	*/
28	/*
29	* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
30	* support for mandatory and extensible security protections. This notice
31	* is included in support of clause 2.2 (b) of the Apple Public License,
32	* Version 2.0.
33	*/
34	#include <stddef.h>
35
36	#include <sys/param.h>
37	#include <sys/systm.h>
38	#include <sys/kernel.h>
39	#include <sys/malloc.h>
40	#include <sys/mbuf.h>
41	#include <sys/socket.h>
42	#include <sys/domain.h>
43	#include <sys/user.h>
44	#include <sys/random.h>
45	#include <sys/socketvar.h>
46	#include <net/if_dl.h>
47	#include <net/if.h>
48	#include <net/route.h>
49	#include <net/if_var.h>
50	#include <net/dlil.h>
51	#include <net/if_arp.h>
52	#include <net/iptap.h>
53	#include <net/pktap.h>
54	#include <sys/kern_event.h>
55	#include <sys/kdebug.h>
56	#include <sys/mcache.h>
57	#include <sys/syslog.h>
58	#include <sys/protosw.h>
59	#include <sys/priv.h>
60
61	#include <kern/assert.h>
62	#include <kern/task.h>
63	#include <kern/thread.h>
64	#include <kern/sched_prim.h>
65	#include <kern/locks.h>
66	#include <kern/zalloc.h>
67
68	#include <net/kpi_protocol.h>
69	#include <net/if_types.h>
70	#include <net/if_ipsec.h>
71	#include <net/if_llreach.h>
72	#include <net/if_utun.h>
73	#include <net/kpi_interfacefilter.h>
74	#include <net/classq/classq.h>
75	#include <net/classq/classq_sfb.h>
76	#include <net/flowhash.h>
77	#include <net/ntstat.h>
78	#include <net/if_llatbl.h>
79	#include <net/net_api_stats.h>
80	#include <net/if_ports_used.h>
81	#include <netinet/in.h>
82	#if INET
83	#include <netinet/in_var.h>
84	#include <netinet/igmp_var.h>
85	#include <netinet/ip_var.h>
86	#include <netinet/tcp.h>
87	#include <netinet/tcp_var.h>
88	#include <netinet/udp.h>
89	#include <netinet/udp_var.h>
90	#include <netinet/if_ether.h>
91	#include <netinet/in_pcb.h>
92	#include <netinet/in_tclass.h>
93	#include <netinet/ip.h>
94	#include <netinet/ip_icmp.h>
95	#include <netinet/icmp_var.h>
96	#endif /* INET */
97
98	#if INET6
99	#include <net/nat464_utils.h>
100	#include <netinet6/in6_var.h>
101	#include <netinet6/nd6.h>
102	#include <netinet6/mld6_var.h>
103	#include <netinet6/scope6_var.h>
104	#include <netinet/ip6.h>
105	#include <netinet/icmp6.h>
106	#endif /* INET6 */
107	#include <net/pf_pbuf.h>
108	#include <libkern/OSAtomic.h>
109	#include <libkern/tree.h>
110
111	#include <dev/random/randomdev.h>
112	#include <machine/machine_routines.h>
113
114	#include <mach/thread_act.h>
115	#include <mach/sdt.h>
116
117	#if CONFIG_MACF
118	#include <sys/kauth.h>
119	#include <security/mac_framework.h>
120	#include <net/ethernet.h>
121	#include <net/firewire.h>
122	#endif
123
124	#if PF
125	#include <net/pfvar.h>
126	#endif /* PF */
127	#include <net/pktsched/pktsched.h>
128
129	#if NECP
130	#include <net/necp.h>
131	#endif /* NECP */
132
133
134	#define DBG_LAYER_BEG DLILDBG_CODE(DBG_DLIL_STATIC, 0)
135	#define DBG_LAYER_END DLILDBG_CODE(DBG_DLIL_STATIC, 2)
136	#define DBG_FNC_DLIL_INPUT DLILDBG_CODE(DBG_DLIL_STATIC, (1 << 8))
137	#define DBG_FNC_DLIL_OUTPUT DLILDBG_CODE(DBG_DLIL_STATIC, (2 << 8))
138	#define DBG_FNC_DLIL_IFOUT DLILDBG_CODE(DBG_DLIL_STATIC, (3 << 8))
139
140	#define MAX_FRAME_TYPE_SIZE 4 /* LONGWORDS */
141	#define MAX_LINKADDR 4 /* LONGWORDS */
142	#define M_NKE M_IFADDR
143
144	#if 1
145	#define DLIL_PRINTF printf
146	#else
147	#define DLIL_PRINTF kprintf
148	#endif
149
150	#define IF_DATA_REQUIRE_ALIGNED_64(f) \
151	_CASSERT(!(offsetof(struct if_data_internal, f) % sizeof (u_int64_t)))
152
153	#define IFNET_IF_DATA_REQUIRE_ALIGNED_64(f) \
154	_CASSERT(!(offsetof(struct ifnet, if_data.f) % sizeof (u_int64_t)))
155
156	enum {
157	kProtoKPI_v1 = `1`,
158	kProtoKPI_v2 = `2`
159	};
160
161	/*
162	* List of if_proto structures in if_proto_hash[] is protected by
163	* the ifnet lock. The rest of the fields are initialized at protocol
164	* attach time and never change, thus no lock required as long as
165	* a reference to it is valid, via if_proto_ref().
166	*/
167	struct if_proto {
168	SLIST_ENTRY(if_proto) next_hash;
169	u_int32_t refcount;
170	u_int32_t detached;
171	struct ifnet *ifp;
172	protocol_family_t protocol_family;
173	int proto_kpi;
174	union {
175	struct {
176	proto_media_input input;
177	proto_media_preout pre_output;
178	proto_media_event event;
179	proto_media_ioctl ioctl;
180	proto_media_detached detached;
181	proto_media_resolve_multi resolve_multi;
182	proto_media_send_arp send_arp;
183	} v1;
184	struct {
185	proto_media_input_v2 input;
186	proto_media_preout pre_output;
187	proto_media_event event;
188	proto_media_ioctl ioctl;
189	proto_media_detached detached;
190	proto_media_resolve_multi resolve_multi;
191	proto_media_send_arp send_arp;
192	} v2;
193	} kpi;
194	};
195
196	SLIST_HEAD(proto_hash_entry, if_proto);
197
198	#define DLIL_SDLDATALEN \
199	(DLIL_SDLMAXLEN - offsetof(struct sockaddr_dl, sdl_data[0]))
200
201	struct dlil_ifnet {
202	struct ifnet dl_if; / public ifnet /
203	/*
204	* DLIL private fields, protected by dl_if_lock
205	*/
206	decl_lck_mtx_data(, dl_if_lock);
207	TAILQ_ENTRY(dlil_ifnet) dl_if_link; / dlil_ifnet link /
208	u_int32_t dl_if_flags; / flags (below) /
209	u_int32_t dl_if_refcnt; / refcnt /
210	void (dl_if_trace)(struct* dlil_ifnet , int); /* ref trace callback /
211	void dl_if_uniqueid; /* unique interface id /
212	size_t dl_if_uniqueid_len; / length of the unique id /
213	char dl_if_namestorage[IFNAMSIZ]; / interface name storage /
214	char dl_if_xnamestorage[IFXNAMSIZ]; / external name storage /
215	struct {
216	struct ifaddr ifa; / lladdr ifa /
217	u_int8_t asdl[DLIL_SDLMAXLEN]; / addr storage /
218	u_int8_t msdl[DLIL_SDLMAXLEN]; / mask storage /
219	} dl_if_lladdr;
220	u_int8_t dl_if_descstorage[IF_DESCSIZE]; / desc storage /
221	struct dlil_threading_info dl_if_inpstorage; / input thread storage /
222	ctrace_t dl_if_attach; / attach PC stacktrace /
223	ctrace_t dl_if_detach; / detach PC stacktrace /
224	};
225
226	/ Values for dl_if_flags (private to DLIL) /
227	#define DLIF_INUSE 0x1 /* DLIL ifnet recycler, ifnet in use */
228	#define DLIF_REUSE 0x2 /* DLIL ifnet recycles, ifnet is not new */
229	#define DLIF_DEBUG 0x4 /* has debugging info */
230
231	#define IF_REF_TRACE_HIST_SIZE 8 /* size of ref trace history */
232
233	/ For gdb /
234	__private_extern__ unsigned int if_ref_trace_hist_size = IF_REF_TRACE_HIST_SIZE;
235
236	struct dlil_ifnet_dbg {
237	struct dlil_ifnet dldbg_dlif; / dlil_ifnet /
238	u_int16_t dldbg_if_refhold_cnt; / # ifnet references /
239	u_int16_t dldbg_if_refrele_cnt; / # ifnet releases /
240	/*
241	* Circular lists of ifnet_{reference,release} callers.
242	*/
243	ctrace_t dldbg_if_refhold[IF_REF_TRACE_HIST_SIZE];
244	ctrace_t dldbg_if_refrele[IF_REF_TRACE_HIST_SIZE];
245	};
246
247	#define DLIL_TO_IFP(s) (&s->dl_if)
248	#define IFP_TO_DLIL(s) ((struct dlil_ifnet *)s)
249
250	struct ifnet_filter {
251	TAILQ_ENTRY(ifnet_filter) filt_next;
252	u_int32_t filt_skip;
253	u_int32_t filt_flags;
254	ifnet_t filt_ifp;
255	const char *filt_name;
256	void *filt_cookie;
257	protocol_family_t filt_protocol;
258	iff_input_func filt_input;
259	iff_output_func filt_output;
260	iff_event_func filt_event;
261	iff_ioctl_func filt_ioctl;
262	iff_detached_func filt_detached;
263	};
264
265	struct proto_input_entry;
266
267	static TAILQ_HEAD(, dlil_ifnet) dlil_ifnet_head;
268	static lck_grp_t *dlil_lock_group;
269	lck_grp_t *ifnet_lock_group;
270	static lck_grp_t *ifnet_head_lock_group;
271	static lck_grp_t *ifnet_snd_lock_group;
272	static lck_grp_t *ifnet_rcv_lock_group;
273	lck_attr_t *ifnet_lock_attr;
274	decl_lck_rw_data(static, ifnet_head_lock);
275	decl_lck_mtx_data(static, dlil_ifnet_lock);
276	u_int32_t dlil_filter_disable_tso_count = `0`;
277
278	#if DEBUG
279	static unsigned int ifnet_debug = `1`; / debugging (enabled) /
280	#else
281	static unsigned int ifnet_debug; / debugging (disabled) /
282	#endif /* !DEBUG */
283	static unsigned int dlif_size; / size of dlil_ifnet to allocate /
284	static unsigned int dlif_bufsize; / size of dlif_size + headroom /
285	static struct zone dlif_zone; /* zone for dlil_ifnet /
286
287	#define DLIF_ZONE_MAX IFNETS_MAX /* maximum elements in zone */
288	#define DLIF_ZONE_NAME "ifnet" /* zone name */
289
290	static unsigned int dlif_filt_size; / size of ifnet_filter /
291	static struct zone dlif_filt_zone; /* zone for ifnet_filter /
292
293	#define DLIF_FILT_ZONE_MAX 8 /* maximum elements in zone */
294	#define DLIF_FILT_ZONE_NAME "ifnet_filter" /* zone name */
295
296	static unsigned int dlif_phash_size; / size of ifnet proto hash table /
297	static struct zone dlif_phash_zone; /* zone for ifnet proto hash table /
298
299	#define DLIF_PHASH_ZONE_MAX DLIF_ZONE_MAX /* maximum elements in zone */
300	#define DLIF_PHASH_ZONE_NAME "ifnet_proto_hash" /* zone name */
301
302	static unsigned int dlif_proto_size; / size of if_proto /
303	static struct zone dlif_proto_zone; /* zone for if_proto /
304
305	#define DLIF_PROTO_ZONE_MAX (DLIF_ZONE_MAX2) / maximum elements in zone */
306	#define DLIF_PROTO_ZONE_NAME "ifnet_proto" /* zone name */
307
308	static unsigned int dlif_tcpstat_size; / size of tcpstat_local to allocate /
309	static unsigned int dlif_tcpstat_bufsize; / size of dlif_tcpstat_size + headroom /
310	static struct zone dlif_tcpstat_zone; /* zone for tcpstat_local /
311
312	#define DLIF_TCPSTAT_ZONE_MAX 1 /* maximum elements in zone */
313	#define DLIF_TCPSTAT_ZONE_NAME "ifnet_tcpstat" /* zone name */
314
315	static unsigned int dlif_udpstat_size; / size of udpstat_local to allocate /
316	static unsigned int dlif_udpstat_bufsize; / size of dlif_udpstat_size + headroom /
317	static struct zone dlif_udpstat_zone; /* zone for udpstat_local /
318
319	#define DLIF_UDPSTAT_ZONE_MAX 1 /* maximum elements in zone */
320	#define DLIF_UDPSTAT_ZONE_NAME "ifnet_udpstat" /* zone name */
321
322	static u_int32_t net_rtref;
323
324	static struct dlil_main_threading_info dlil_main_input_thread_info;
325	__private_extern__ struct dlil_threading_info *dlil_main_input_thread =
326	(struct dlil_threading_info *)&dlil_main_input_thread_info;
327
328	static int dlil_event_internal(struct ifnet ifp, struct* kev_msg *msg, bool update_generation);
329	static int dlil_detach_filter_internal(interface_filter_t filter, int detached);
330	static void dlil_if_trace(struct dlil_ifnet , int*);
331	static void if_proto_ref(struct if_proto *);
332	static void if_proto_free(struct if_proto *);
333	static struct if_proto find_attached_proto(struct* ifnet *, u_int32_t);
334	static u_int32_t dlil_ifp_protolist(struct ifnet ifp, protocol_family_t list,
335	u_int32_t list_count);
336	static void if_flt_monitor_busy(struct ifnet *);
337	static void if_flt_monitor_unbusy(struct ifnet *);
338	static void if_flt_monitor_enter(struct ifnet *);
339	static void if_flt_monitor_leave(struct ifnet *);
340	static int dlil_interface_filters_input(struct ifnet , struct* mbuf **,
341	char **, protocol_family_t);
342	static int dlil_interface_filters_output(struct ifnet , struct* mbuf **,
343	protocol_family_t);
344	static struct ifaddr dlil_alloc_lladdr(struct* ifnet *,
345	const struct sockaddr_dl *);
346	static int ifnet_lookup(struct ifnet *);
347	static void if_purgeaddrs(struct ifnet *);
348
349	static errno_t ifproto_media_input_v1(struct ifnet *, protocol_family_t,
350	struct mbuf , char* *);
351	static errno_t ifproto_media_input_v2(struct ifnet *, protocol_family_t,
352	struct mbuf *);
353	static errno_t ifproto_media_preout(struct ifnet *, protocol_family_t,
354	mbuf_t , const* struct sockaddr , void* , char* , char* *);
355	static void ifproto_media_event(struct ifnet *, protocol_family_t,
356	const struct kev_msg *);
357	static errno_t ifproto_media_ioctl(struct ifnet *, protocol_family_t,
358	unsigned long, void *);
359	static errno_t ifproto_media_resolve_multi(ifnet_t, const struct sockaddr *,
360	struct sockaddr_dl *, size_t);
361	static errno_t ifproto_media_send_arp(struct ifnet *, u_short,
362	const struct sockaddr_dl , const* struct sockaddr *,
363	const struct sockaddr_dl , const* struct sockaddr *);
364
365	static errno_t ifp_if_input(struct ifnet ifp, struct* mbuf *m_head,
366	struct mbuf m_tail, const* struct ifnet_stat_increment_param *s,
367	boolean_t poll, struct thread *tp);
368	static void ifp_if_input_poll(struct ifnet *, u_int32_t, u_int32_t,
369	struct mbuf , struct mbuf , u_int32_t , u_int32_t );
370	static errno_t ifp_if_ctl(struct ifnet , ifnet_ctl_cmd_t, u_int32_t, void* *);
371	static errno_t ifp_if_demux(struct ifnet , struct* mbuf , char* *,
372	protocol_family_t *);
373	static errno_t ifp_if_add_proto(struct ifnet *, protocol_family_t,
374	const struct ifnet_demux_desc *, u_int32_t);
375	static errno_t ifp_if_del_proto(struct ifnet *, protocol_family_t);
376	static errno_t ifp_if_check_multi(struct ifnet , const* struct sockaddr *);
377	#if CONFIG_EMBEDDED
378	static errno_t ifp_if_framer(struct ifnet , struct* mbuf **,
379	const struct sockaddr , const* char , const* char *,
380	u_int32_t , u_int32_t );
381	#else
382	static errno_t ifp_if_framer(struct ifnet , struct* mbuf **,
383	const struct sockaddr , const* char , const* char *);
384	#endif /* CONFIG_EMBEDDED */
385	static errno_t ifp_if_framer_extended(struct ifnet , struct* mbuf **,
386	const struct sockaddr , const* char , const* char *,
387	u_int32_t , u_int32_t );
388	static errno_t ifp_if_set_bpf_tap(struct ifnet *, bpf_tap_mode, bpf_packet_func);
389	static void ifp_if_free(struct ifnet *);
390	static void ifp_if_event(struct ifnet , const* struct kev_msg *);
391	static __inline void ifp_inc_traffic_class_in(struct ifnet , struct* mbuf *);
392	static __inline void ifp_inc_traffic_class_out(struct ifnet , struct* mbuf *);
393
394	static void dlil_main_input_thread_func(void *, wait_result_t);
395	static void dlil_input_thread_func(void *, wait_result_t);
396	static void dlil_rxpoll_input_thread_func(void *, wait_result_t);
397	static int dlil_create_input_thread(ifnet_t, struct dlil_threading_info *);
398	static void dlil_terminate_input_thread(struct dlil_threading_info *);
399	static void dlil_input_stats_add(const struct ifnet_stat_increment_param *,
400	struct dlil_threading_info *, boolean_t);
401	static void dlil_input_stats_sync(struct ifnet , struct* dlil_threading_info *);
402	static void dlil_input_packet_list_common(struct ifnet , struct* mbuf *,
403	u_int32_t, ifnet_model_t, boolean_t);
404	static errno_t ifnet_input_common(struct ifnet , struct* mbuf , struct* mbuf *,
405	const struct ifnet_stat_increment_param *, boolean_t, boolean_t);
406	static int dlil_is_clat_needed(protocol_family_t , mbuf_t );
407	static errno_t dlil_clat46(ifnet_t, protocol_family_t , mbuf_t );
408	static errno_t dlil_clat64(ifnet_t, protocol_family_t , mbuf_t );
409	#if DEBUG \|\| DEVELOPMENT
410	static void dlil_verify_sum16(void);
411	#endif /* DEBUG \|\| DEVELOPMENT */
412	static void dlil_output_cksum_dbg(struct ifnet , struct* mbuf *, uint32_t,
413	protocol_family_t);
414	static void dlil_input_cksum_dbg(struct ifnet , struct* mbuf , char* *,
415	protocol_family_t);
416
417	static void ifnet_detacher_thread_func(void *, wait_result_t);
418	static int ifnet_detacher_thread_cont(int);
419	static void ifnet_detach_final(struct ifnet *);
420	static void ifnet_detaching_enqueue(struct ifnet *);
421	static struct ifnet ifnet_detaching_dequeue(void*);
422
423	static void ifnet_start_thread_fn(void *, wait_result_t);
424	static void ifnet_poll_thread_fn(void *, wait_result_t);
425	static void ifnet_poll(struct ifnet *);
426	static errno_t ifnet_enqueue_common(struct ifnet , void* *,
427	classq_pkt_type_t, boolean_t, boolean_t *);
428
429	static void ifp_src_route_copyout(struct ifnet , struct* route *);
430	static void ifp_src_route_copyin(struct ifnet , struct* route *);
431	#if INET6
432	static void ifp_src_route6_copyout(struct ifnet , struct* route_in6 *);
433	static void ifp_src_route6_copyin(struct ifnet , struct* route_in6 *);
434	#endif /* INET6 */
435
436	static int sysctl_rxpoll SYSCTL_HANDLER_ARGS;
437	static int sysctl_rxpoll_mode_holdtime SYSCTL_HANDLER_ARGS;
438	static int sysctl_rxpoll_sample_holdtime SYSCTL_HANDLER_ARGS;
439	static int sysctl_rxpoll_interval_time SYSCTL_HANDLER_ARGS;
440	static int sysctl_rxpoll_wlowat SYSCTL_HANDLER_ARGS;
441	static int sysctl_rxpoll_whiwat SYSCTL_HANDLER_ARGS;
442	static int sysctl_sndq_maxlen SYSCTL_HANDLER_ARGS;
443	static int sysctl_rcvq_maxlen SYSCTL_HANDLER_ARGS;
444	static int sysctl_hwcksum_dbg_mode SYSCTL_HANDLER_ARGS;
445	static int sysctl_hwcksum_dbg_partial_rxoff_forced SYSCTL_HANDLER_ARGS;
446	static int sysctl_hwcksum_dbg_partial_rxoff_adj SYSCTL_HANDLER_ARGS;
447
448	struct chain_len_stats tx_chain_len_stats;
449	static int sysctl_tx_chain_len_stats SYSCTL_HANDLER_ARGS;
450
451	#if TEST_INPUT_THREAD_TERMINATION
452	static int sysctl_input_thread_termination_spin SYSCTL_HANDLER_ARGS;
453	#endif /* TEST_INPUT_THREAD_TERMINATION */
454
455	/ The following are protected by dlil_ifnet_lock /
456	static TAILQ_HEAD(, ifnet) ifnet_detaching_head;
457	static u_int32_t ifnet_detaching_cnt;
458	static void ifnet_delayed_run; /* wait channel for detaching thread /
459
460	decl_lck_mtx_data(static, ifnet_fc_lock);
461
462	static uint32_t ifnet_flowhash_seed;
463
464	struct ifnet_flowhash_key {
465	char ifk_name[IFNAMSIZ];
466	uint32_t ifk_unit;
467	uint32_t ifk_flags;
468	uint32_t ifk_eflags;
469	uint32_t ifk_capabilities;
470	uint32_t ifk_capenable;
471	uint32_t ifk_output_sched_model;
472	uint32_t ifk_rand1;
473	uint32_t ifk_rand2;
474	};
475
476	/ Flow control entry per interface /
477	struct ifnet_fc_entry {
478	RB_ENTRY(ifnet_fc_entry) ifce_entry;
479	u_int32_t ifce_flowhash;
480	struct ifnet *ifce_ifp;
481	};
482
483	static uint32_t ifnet_calc_flowhash(struct ifnet *);
484	static int ifce_cmp(const struct ifnet_fc_entry *,
485	const struct ifnet_fc_entry *);
486	static int ifnet_fc_add(struct ifnet *);
487	static struct ifnet_fc_entry *ifnet_fc_get(u_int32_t);
488	static void ifnet_fc_entry_free(struct ifnet_fc_entry *);
489
490	/ protected by ifnet_fc_lock /
491	RB_HEAD(ifnet_fc_tree, ifnet_fc_entry) ifnet_fc_tree;
492	RB_PROTOTYPE(ifnet_fc_tree, ifnet_fc_entry, ifce_entry, ifce_cmp);
493	RB_GENERATE(ifnet_fc_tree, ifnet_fc_entry, ifce_entry, ifce_cmp);
494
495	static unsigned int ifnet_fc_zone_size; / sizeof ifnet_fc_entry /
496	static struct zone ifnet_fc_zone; /* ifnet_fc_entry zone /
497
498	#define IFNET_FC_ZONE_NAME "ifnet_fc_zone"
499	#define IFNET_FC_ZONE_MAX 32
500
501	extern void bpfdetach(struct ifnet *);
502	extern void proto_input_run(void);
503
504	extern uint32_t udp_count_opportunistic(unsigned int ifindex,
505	u_int32_t flags);
506	extern uint32_t tcp_count_opportunistic(unsigned int ifindex,
507	u_int32_t flags);
508
509	__private_extern__ void link_rtrequest(int, struct rtentry , struct* sockaddr *);
510
511	#if CONFIG_MACF
512	#ifdef CONFIG_EMBEDDED
513	int dlil_lladdr_ckreq = `1`;
514	#else
515	int dlil_lladdr_ckreq = `0`;
516	#endif
517	#endif
518
519	#if DEBUG
520	int dlil_verbose = `1`;
521	#else
522	int dlil_verbose = `0`;
523	#endif /* DEBUG */
524	#if IFNET_INPUT_SANITY_CHK
525	/ sanity checking of input packet lists received /
526	static u_int32_t dlil_input_sanity_check = `0`;
527	#endif /* IFNET_INPUT_SANITY_CHK */
528	/ rate limit debug messages /
529	struct timespec dlil_dbgrate = { `1`, `0` };
530
531	SYSCTL_DECL(_net_link_generic_system);
532
533	SYSCTL_INT(_net_link_generic_system, OID_AUTO, dlil_verbose,
534	CTLFLAG_RW \| CTLFLAG_LOCKED, &dlil_verbose, `0`, "Log DLIL error messages");
535
536	#define IF_SNDQ_MINLEN 32
537	u_int32_t if_sndq_maxlen = IFQ_MAXLEN;
538	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, sndq_maxlen,
539	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_sndq_maxlen, IFQ_MAXLEN,
540	sysctl_sndq_maxlen, "I", "Default transmit queue max length");
541
542	#define IF_RCVQ_MINLEN 32
543	#define IF_RCVQ_MAXLEN 256
544	u_int32_t if_rcvq_maxlen = IF_RCVQ_MAXLEN;
545	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rcvq_maxlen,
546	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rcvq_maxlen, IFQ_MAXLEN,
547	sysctl_rcvq_maxlen, "I", "Default receive queue max length");
548
549	#define IF_RXPOLL_DECAY 2 /* ilog2 of EWMA decay rate (4) */
550	static u_int32_t if_rxpoll_decay = IF_RXPOLL_DECAY;
551	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rxpoll_decay,
552	CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_decay, IF_RXPOLL_DECAY,
553	"ilog2 of EWMA decay rate of avg inbound packets");
554
555	#define IF_RXPOLL_MODE_HOLDTIME_MIN (10ULL * 1000 * 1000) /* 10 ms */
556	#define IF_RXPOLL_MODE_HOLDTIME (1000ULL * 1000 * 1000) /* 1 sec */
557	static u_int64_t if_rxpoll_mode_holdtime = IF_RXPOLL_MODE_HOLDTIME;
558	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll_freeze_time,
559	CTLTYPE_QUAD \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_mode_holdtime,
560	IF_RXPOLL_MODE_HOLDTIME, sysctl_rxpoll_mode_holdtime,
561	"Q", "input poll mode freeze time");
562
563	#define IF_RXPOLL_SAMPLETIME_MIN (1ULL * 1000 * 1000) /* 1 ms */
564	#define IF_RXPOLL_SAMPLETIME (10ULL * 1000 * 1000) /* 10 ms */
565	static u_int64_t if_rxpoll_sample_holdtime = IF_RXPOLL_SAMPLETIME;
566	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll_sample_time,
567	CTLTYPE_QUAD \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_sample_holdtime,
568	IF_RXPOLL_SAMPLETIME, sysctl_rxpoll_sample_holdtime,
569	"Q", "input poll sampling time");
570
571	#define IF_RXPOLL_INTERVALTIME_MIN (1ULL * 1000) /* 1 us */
572	#define IF_RXPOLL_INTERVALTIME (1ULL * 1000 * 1000) /* 1 ms */
573	static u_int64_t if_rxpoll_interval_time = IF_RXPOLL_INTERVALTIME;
574	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll_interval_time,
575	CTLTYPE_QUAD \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_interval_time,
576	IF_RXPOLL_INTERVALTIME, sysctl_rxpoll_interval_time,
577	"Q", "input poll interval (time)");
578
579	#define IF_RXPOLL_INTERVAL_PKTS 0 /* 0 (disabled) */
580	static u_int32_t if_rxpoll_interval_pkts = IF_RXPOLL_INTERVAL_PKTS;
581	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rxpoll_interval_pkts,
582	CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_interval_pkts,
583	IF_RXPOLL_INTERVAL_PKTS, "input poll interval (packets)");
584
585	#define IF_RXPOLL_WLOWAT 10
586	static u_int32_t if_rxpoll_wlowat = IF_RXPOLL_WLOWAT;
587	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll_wakeups_lowat,
588	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_wlowat,
589	IF_RXPOLL_WLOWAT, sysctl_rxpoll_wlowat,
590	"I", "input poll wakeup low watermark");
591
592	#define IF_RXPOLL_WHIWAT 100
593	static u_int32_t if_rxpoll_whiwat = IF_RXPOLL_WHIWAT;
594	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll_wakeups_hiwat,
595	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_whiwat,
596	IF_RXPOLL_WHIWAT, sysctl_rxpoll_whiwat,
597	"I", "input poll wakeup high watermark");
598
599	static u_int32_t if_rxpoll_max = `0`; / 0 (automatic) /
600	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rxpoll_max,
601	CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll_max, `0`,
602	"max packets per poll call");
603
604	static u_int32_t if_rxpoll = `1`;
605	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, rxpoll,
606	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &if_rxpoll, `0`,
607	sysctl_rxpoll, "I", "enable opportunistic input polling");
608
609	#if TEST_INPUT_THREAD_TERMINATION
610	static u_int32_t if_input_thread_termination_spin = `0`;
611	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, input_thread_termination_spin,
612	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED,
613	&if_input_thread_termination_spin, `0`,
614	sysctl_input_thread_termination_spin,
615	"I", "input thread termination spin limit");
616	#endif /* TEST_INPUT_THREAD_TERMINATION */
617
618	static u_int32_t cur_dlil_input_threads = `0`;
619	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, dlil_input_threads,
620	CTLFLAG_RD \| CTLFLAG_LOCKED, &cur_dlil_input_threads, `0`,
621	"Current number of DLIL input threads");
622
623	#if IFNET_INPUT_SANITY_CHK
624	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, dlil_input_sanity_check,
625	CTLFLAG_RW \| CTLFLAG_LOCKED, &dlil_input_sanity_check, `0`,
626	"Turn on sanity checking in DLIL input");
627	#endif /* IFNET_INPUT_SANITY_CHK */
628
629	static u_int32_t if_flowadv = `1`;
630	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, flow_advisory,
631	CTLFLAG_RW \| CTLFLAG_LOCKED, &if_flowadv, `1`,
632	"enable flow-advisory mechanism");
633
634	static u_int32_t if_delaybased_queue = `1`;
635	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, delaybased_queue,
636	CTLFLAG_RW \| CTLFLAG_LOCKED, &if_delaybased_queue, `1`,
637	"enable delay based dynamic queue sizing");
638
639	static uint64_t hwcksum_in_invalidated = `0`;
640	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
641	hwcksum_in_invalidated, CTLFLAG_RD \| CTLFLAG_LOCKED,
642	&hwcksum_in_invalidated, "inbound packets with invalidated hardware cksum");
643
644	uint32_t hwcksum_dbg = `0`;
645	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, hwcksum_dbg,
646	CTLFLAG_RW \| CTLFLAG_LOCKED, &hwcksum_dbg, `0`,
647	"enable hardware cksum debugging");
648
649	u_int32_t ifnet_start_delayed = `0`;
650	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, start_delayed,
651	CTLFLAG_RW \| CTLFLAG_LOCKED, &ifnet_start_delayed, `0`,
652	"number of times start was delayed");
653
654	u_int32_t ifnet_delay_start_disabled = `0`;
655	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, start_delay_disabled,
656	CTLFLAG_RW \| CTLFLAG_LOCKED, &ifnet_delay_start_disabled, `0`,
657	"number of times start was delayed");
658
659	#define HWCKSUM_DBG_PARTIAL_FORCED 0x1 /* forced partial checksum */
660	#define HWCKSUM_DBG_PARTIAL_RXOFF_ADJ 0x2 /* adjust start offset */
661	#define HWCKSUM_DBG_FINALIZE_FORCED 0x10 /* forced finalize */
662	#define HWCKSUM_DBG_MASK \
663	(HWCKSUM_DBG_PARTIAL_FORCED \| HWCKSUM_DBG_PARTIAL_RXOFF_ADJ \| \
664	HWCKSUM_DBG_FINALIZE_FORCED)
665
666	static uint32_t hwcksum_dbg_mode = `0`;
667	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, hwcksum_dbg_mode,
668	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &hwcksum_dbg_mode,
669	`0`, sysctl_hwcksum_dbg_mode, "I", "hardware cksum debugging mode");
670
671	static uint64_t hwcksum_dbg_partial_forced = `0`;
672	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
673	hwcksum_dbg_partial_forced, CTLFLAG_RD \| CTLFLAG_LOCKED,
674	&hwcksum_dbg_partial_forced, "packets forced using partial cksum");
675
676	static uint64_t hwcksum_dbg_partial_forced_bytes = `0`;
677	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
678	hwcksum_dbg_partial_forced_bytes, CTLFLAG_RD \| CTLFLAG_LOCKED,
679	&hwcksum_dbg_partial_forced_bytes, "bytes forced using partial cksum");
680
681	static uint32_t hwcksum_dbg_partial_rxoff_forced = `0`;
682	SYSCTL_PROC(_net_link_generic_system, OID_AUTO,
683	hwcksum_dbg_partial_rxoff_forced, CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED,
684	&hwcksum_dbg_partial_rxoff_forced, `0`,
685	sysctl_hwcksum_dbg_partial_rxoff_forced, "I",
686	"forced partial cksum rx offset");
687
688	static uint32_t hwcksum_dbg_partial_rxoff_adj = `0`;
689	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, hwcksum_dbg_partial_rxoff_adj,
690	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_LOCKED, &hwcksum_dbg_partial_rxoff_adj,
691	`0`, sysctl_hwcksum_dbg_partial_rxoff_adj, "I",
692	"adjusted partial cksum rx offset");
693
694	static uint64_t hwcksum_dbg_verified = `0`;
695	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
696	hwcksum_dbg_verified, CTLFLAG_RD \| CTLFLAG_LOCKED,
697	&hwcksum_dbg_verified, "packets verified for having good checksum");
698
699	static uint64_t hwcksum_dbg_bad_cksum = `0`;
700	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
701	hwcksum_dbg_bad_cksum, CTLFLAG_RD \| CTLFLAG_LOCKED,
702	&hwcksum_dbg_bad_cksum, "packets with bad hardware calculated checksum");
703
704	static uint64_t hwcksum_dbg_bad_rxoff = `0`;
705	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
706	hwcksum_dbg_bad_rxoff, CTLFLAG_RD \| CTLFLAG_LOCKED,
707	&hwcksum_dbg_bad_rxoff, "packets with invalid rxoff");
708
709	static uint64_t hwcksum_dbg_adjusted = `0`;
710	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
711	hwcksum_dbg_adjusted, CTLFLAG_RD \| CTLFLAG_LOCKED,
712	&hwcksum_dbg_adjusted, "packets with rxoff adjusted");
713
714	static uint64_t hwcksum_dbg_finalized_hdr = `0`;
715	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
716	hwcksum_dbg_finalized_hdr, CTLFLAG_RD \| CTLFLAG_LOCKED,
717	&hwcksum_dbg_finalized_hdr, "finalized headers");
718
719	static uint64_t hwcksum_dbg_finalized_data = `0`;
720	SYSCTL_QUAD(_net_link_generic_system, OID_AUTO,
721	hwcksum_dbg_finalized_data, CTLFLAG_RD \| CTLFLAG_LOCKED,
722	&hwcksum_dbg_finalized_data, "finalized payloads");
723
724	uint32_t hwcksum_tx = `1`;
725	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, hwcksum_tx,
726	CTLFLAG_RW \| CTLFLAG_LOCKED, &hwcksum_tx, `0`,
727	"enable transmit hardware checksum offload");
728
729	uint32_t hwcksum_rx = `1`;
730	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, hwcksum_rx,
731	CTLFLAG_RW \| CTLFLAG_LOCKED, &hwcksum_rx, `0`,
732	"enable receive hardware checksum offload");
733
734	SYSCTL_PROC(_net_link_generic_system, OID_AUTO, tx_chain_len_stats,
735	CTLFLAG_RD \| CTLFLAG_LOCKED, `0`, `9`,
736	sysctl_tx_chain_len_stats, "S", "");
737
738	uint32_t tx_chain_len_count = `0`;
739	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, tx_chain_len_count,
740	CTLFLAG_RW \| CTLFLAG_LOCKED, &tx_chain_len_count, `0`, "");
741
742	static uint32_t threshold_notify = `1`; / enable/disable /
743	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, threshold_notify,
744	CTLFLAG_RW \| CTLFLAG_LOCKED, &threshold_notify, `0`, "");
745
746	static uint32_t threshold_interval = `2`; / in seconds /
747	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, threshold_interval,
748	CTLFLAG_RW \| CTLFLAG_LOCKED, &threshold_interval, `0`, "");
749
750	#if (DEVELOPMENT \|\| DEBUG)
751	static int sysctl_get_kao_frames SYSCTL_HANDLER_ARGS;
752	SYSCTL_NODE(_net_link_generic_system, OID_AUTO, get_kao_frames,
753	CTLFLAG_RD \| CTLFLAG_LOCKED, sysctl_get_kao_frames, "");
754	#endif /* DEVELOPMENT \|\| DEBUG */
755
756	struct net_api_stats net_api_stats;
757	SYSCTL_STRUCT(_net, OID_AUTO, api_stats, CTLFLAG_RD\|CTLFLAG_LOCKED,
758	&net_api_stats, net_api_stats, "");
759
760
761	unsigned int net_rxpoll = `1`;
762	unsigned int net_affinity = `1`;
763	static kern_return_t dlil_affinity_set(struct thread *, u_int32_t);
764
765	extern u_int32_t inject_buckets;
766
767	static lck_grp_attr_t *dlil_grp_attributes = NULL;
768	static lck_attr_t *dlil_lck_attributes = NULL;
769
770	/ DLIL data threshold thread call /
771	static void dlil_dt_tcall_fn(thread_call_param_t, thread_call_param_t);
772
773	static void dlil_mit_tcall_fn(thread_call_param_t, thread_call_param_t);
774
775	uint32_t dlil_rcv_mit_pkts_min = `5`;
776	uint32_t dlil_rcv_mit_pkts_max = `64`;
777	uint32_t dlil_rcv_mit_interval = (`500` * `1000`);
778
779	#if (DEVELOPMENT \|\| DEBUG)
780	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rcv_mit_pkts_min,
781	CTLFLAG_RW \| CTLFLAG_LOCKED, &dlil_rcv_mit_pkts_min, `0`, "");
782	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rcv_mit_pkts_max,
783	CTLFLAG_RW \| CTLFLAG_LOCKED, &dlil_rcv_mit_pkts_max, `0`, "");
784	SYSCTL_UINT(_net_link_generic_system, OID_AUTO, rcv_mit_interval,
785	CTLFLAG_RW \| CTLFLAG_LOCKED, &dlil_rcv_mit_interval, `0`, "");
786	#endif /* DEVELOPMENT \|\| DEBUG */
787
788
789	#define DLIL_INPUT_CHECK(m, ifp) { \
790	struct ifnet *_rcvif = mbuf_pkthdr_rcvif(m); \
791	if (_rcvif == NULL \|\| (ifp != lo_ifp && _rcvif != ifp) \|\| \
792	!(mbuf_flags(m) & MBUF_PKTHDR)) { \
793	panic_plain("%s: invalid mbuf %p\n", __func__, m); \
794	/* NOTREACHED */ \
795	} \
796	}
797
798	#define DLIL_EWMA(old, new, decay) do { \
799	u_int32_t _avg; \
800	if ((_avg = (old)) > 0) \
801	_avg = (((_avg << (decay)) - _avg) + (new)) >> (decay); \
802	else \
803	_avg = (new); \
804	(old) = _avg; \
805	} while (0)
806
807	#define MBPS (1ULL * 1000 * 1000)
808	#define GBPS (MBPS * 1000)
809
810	struct rxpoll_time_tbl {
811	u_int64_t speed; / downlink speed /
812	u_int32_t plowat; / packets low watermark /
813	u_int32_t phiwat; / packets high watermark /
814	u_int32_t blowat; / bytes low watermark /
815	u_int32_t bhiwat; / bytes high watermark /
816	};
817
818	static struct rxpoll_time_tbl rxpoll_tbl[] = {
819	{ `10` * MBPS, `2`, `8`, (`1` * `1024`), (`6` * `1024`) },
820	{ `100` * MBPS, `10`, `40`, (`4` * `1024`), (`64` * `1024`) },
821	{ `1` * GBPS, `10`, `40`, (`4` * `1024`), (`64` * `1024`) },
822	{ `10` * GBPS, `10`, `40`, (`4` * `1024`), (`64` * `1024`) },
823	{ `100` * GBPS, `10`, `40`, (`4` * `1024`), (`64` * `1024`) },
824	{ `0`, `0`, `0`, `0`, `0` }
825	};
826
827	int
828	proto_hash_value(u_int32_t protocol_family)
829	{
830	/*
831	* dlil_proto_unplumb_all() depends on the mapping between
832	* the hash bucket index and the protocol family defined
833	* here; future changes must be applied there as well.
834	*/
835	switch (protocol_family) {
836	case PF_INET:
837	return (`0`);
838	case PF_INET6:
839	return (`1`);
840	case PF_VLAN:
841	return (`2`);
842	case PF_UNSPEC:
843	default:
844	return (`3`);
845	}
846	}
847
848	/*
849	* Caller must already be holding ifnet lock.
850	*/
851	static struct if_proto *
852	find_attached_proto(struct ifnet *ifp, u_int32_t protocol_family)
853	{
854	struct if_proto *proto = NULL;
855	u_int32_t i = proto_hash_value(protocol_family);
856
857	ifnet_lock_assert(ifp, IFNET_LCK_ASSERT_OWNED);
858
859	if (ifp->if_proto_hash != NULL)
860	proto = SLIST_FIRST(&ifp->if_proto_hash[i]);
861
862	while (proto != NULL && proto->protocol_family != protocol_family)
863	proto = SLIST_NEXT(proto, next_hash);
864
865	if (proto != NULL)
866	if_proto_ref(proto);
867
868	return (proto);
869	}
870
871	static void
872	if_proto_ref(struct if_proto *proto)
873	{
874	atomic_add_32(&proto->refcount, `1`);
875	}
876
877	extern void if_rtproto_del(struct ifnet ifp, int* protocol);
878
879	static void
880	if_proto_free(struct if_proto *proto)
881	{
882	u_int32_t oldval;
883	struct ifnet *ifp = proto->ifp;
884	u_int32_t proto_family = proto->protocol_family;
885	struct kev_dl_proto_data ev_pr_data;
886
887	oldval = atomic_add_32_ov(&proto->refcount, -`1`);
888	if (oldval > `1`)
889	return;
890
891	/ No more reference on this, protocol must have been detached /
892	VERIFY(proto->detached);
893
894	if (proto->proto_kpi == kProtoKPI_v1) {
895	if (proto->kpi.v1.detached)
896	proto->kpi.v1.detached(ifp, proto->protocol_family);
897	}
898	if (proto->proto_kpi == kProtoKPI_v2) {
899	if (proto->kpi.v2.detached)
900	proto->kpi.v2.detached(ifp, proto->protocol_family);
901	}
902
903	/*
904	* Cleanup routes that may still be in the routing table for that
905	* interface/protocol pair.
906	*/
907	if_rtproto_del(ifp, proto_family);
908
909	/*
910	* The reserved field carries the number of protocol still attached
911	* (subject to change)
912	*/
913	ifnet_lock_shared(ifp);
914	ev_pr_data.proto_family = proto_family;
915	ev_pr_data.proto_remaining_count = dlil_ifp_protolist(ifp, NULL, `0`);
916	ifnet_lock_done(ifp);
917
918	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_PROTO_DETACHED,
919	(struct net_event_data *)&ev_pr_data,
920	sizeof (struct kev_dl_proto_data));
921
922	if (ev_pr_data.proto_remaining_count == `0`) {
923	/*
924	* The protocol count has gone to zero, mark the interface down.
925	* This used to be done by configd.KernelEventMonitor, but that
926	* is inherently prone to races (rdar://problem/30810208).
927	*/
928	(void) ifnet_set_flags(ifp, `0`, IFF_UP);
929	(void) ifnet_ioctl(ifp, `0`, SIOCSIFFLAGS, NULL);
930	dlil_post_sifflags_msg(ifp);
931	}
932
933	zfree(dlif_proto_zone, proto);
934	}
935
936	__private_extern__ void
937	ifnet_lock_assert(struct ifnet *ifp, ifnet_lock_assert_t what)
938	{
939	#if !MACH_ASSERT
940	#pragma unused(ifp)
941	#endif
942	unsigned int type = `0`;
943	int ass = `1`;
944
945	switch (what) {
946	case IFNET_LCK_ASSERT_EXCLUSIVE:
947	type = LCK_RW_ASSERT_EXCLUSIVE;
948	break;
949
950	case IFNET_LCK_ASSERT_SHARED:
951	type = LCK_RW_ASSERT_SHARED;
952	break;
953
954	case IFNET_LCK_ASSERT_OWNED:
955	type = LCK_RW_ASSERT_HELD;
956	break;
957
958	case IFNET_LCK_ASSERT_NOTOWNED:
959	/ nothing to do here for RW lock; bypass assert /
960	ass = `0`;
961	break;
962
963	default:
964	panic("bad ifnet assert type: %d", what);
965	/ NOTREACHED /
966	}
967	if (ass)
968	LCK_RW_ASSERT(&ifp->if_lock, type);
969	}
970
971	__private_extern__ void
972	ifnet_lock_shared(struct ifnet *ifp)
973	{
974	lck_rw_lock_shared(&ifp->if_lock);
975	}
976
977	__private_extern__ void
978	ifnet_lock_exclusive(struct ifnet *ifp)
979	{
980	lck_rw_lock_exclusive(&ifp->if_lock);
981	}
982
983	__private_extern__ void
984	ifnet_lock_done(struct ifnet *ifp)
985	{
986	lck_rw_done(&ifp->if_lock);
987	}
988
989	#if INET
990	__private_extern__ void
991	if_inetdata_lock_shared(struct ifnet *ifp)
992	{
993	lck_rw_lock_shared(&ifp->if_inetdata_lock);
994	}
995
996	__private_extern__ void
997	if_inetdata_lock_exclusive(struct ifnet *ifp)
998	{
999	lck_rw_lock_exclusive(&ifp->if_inetdata_lock);
1000	}
1001
1002	__private_extern__ void
1003	if_inetdata_lock_done(struct ifnet *ifp)
1004	{
1005	lck_rw_done(&ifp->if_inetdata_lock);
1006	}
1007	#endif
1008
1009	#if INET6
1010	__private_extern__ void
1011	if_inet6data_lock_shared(struct ifnet *ifp)
1012	{
1013	lck_rw_lock_shared(&ifp->if_inet6data_lock);
1014	}
1015
1016	__private_extern__ void
1017	if_inet6data_lock_exclusive(struct ifnet *ifp)
1018	{
1019	lck_rw_lock_exclusive(&ifp->if_inet6data_lock);
1020	}
1021
1022	__private_extern__ void
1023	if_inet6data_lock_done(struct ifnet *ifp)
1024	{
1025	lck_rw_done(&ifp->if_inet6data_lock);
1026	}
1027	#endif
1028
1029	__private_extern__ void
1030	ifnet_head_lock_shared(void)
1031	{
1032	lck_rw_lock_shared(&ifnet_head_lock);
1033	}
1034
1035	__private_extern__ void
1036	ifnet_head_lock_exclusive(void)
1037	{
1038	lck_rw_lock_exclusive(&ifnet_head_lock);
1039	}
1040
1041	__private_extern__ void
1042	ifnet_head_done(void)
1043	{
1044	lck_rw_done(&ifnet_head_lock);
1045	}
1046
1047	__private_extern__ void
1048	ifnet_head_assert_exclusive(void)
1049	{
1050	LCK_RW_ASSERT(&ifnet_head_lock, LCK_RW_ASSERT_EXCLUSIVE);
1051	}
1052
1053	/*
1054	* dlil_ifp_protolist
1055	* - get the list of protocols attached to the interface, or just the number
1056	* of attached protocols
1057	* - if the number returned is greater than 'list_count', truncation occurred
1058	*
1059	* Note:
1060	* - caller must already be holding ifnet lock.
1061	*/
1062	static u_int32_t
1063	dlil_ifp_protolist(struct ifnet ifp, protocol_family_t list,
1064	u_int32_t list_count)
1065	{
1066	u_int32_t count = `0`;
1067	int i;
1068
1069	ifnet_lock_assert(ifp, IFNET_LCK_ASSERT_OWNED);
1070
1071	if (ifp->if_proto_hash == NULL)
1072	goto done;
1073
1074	for (i = `0`; i < PROTO_HASH_SLOTS; i++) {
1075	struct if_proto *proto;
1076	SLIST_FOREACH(proto, &ifp->if_proto_hash[i], next_hash) {
1077	if (list != NULL && count < list_count) {
1078	list[count] = proto->protocol_family;
1079	}
1080	count++;
1081	}
1082	}
1083	done:
1084	return (count);
1085	}
1086
1087	__private_extern__ u_int32_t
1088	if_get_protolist(struct ifnet * ifp, u_int32_t *protolist, u_int32_t count)
1089	{
1090	ifnet_lock_shared(ifp);
1091	count = dlil_ifp_protolist(ifp, protolist, count);
1092	ifnet_lock_done(ifp);
1093	return (count);
1094	}
1095
1096	__private_extern__ void
1097	if_free_protolist(u_int32_t *list)
1098	{
1099	_FREE(list, M_TEMP);
1100	}
1101
1102	__private_extern__ void
1103	dlil_post_msg(struct ifnet *ifp, u_int32_t event_subclass,
1104	u_int32_t event_code, struct net_event_data *event_data,
1105	u_int32_t event_data_len)
1106	{
1107	struct net_event_data ev_data;
1108	struct kev_msg ev_msg;
1109
1110	bzero(&ev_msg, sizeof (ev_msg));
1111	bzero(&ev_data, sizeof (ev_data));
1112	/*
1113	* a net event always starts with a net_event_data structure
1114	* but the caller can generate a simple net event or
1115	* provide a longer event structure to post
1116	*/
1117	ev_msg.vendor_code = KEV_VENDOR_APPLE;
1118	ev_msg.kev_class = KEV_NETWORK_CLASS;
1119	ev_msg.kev_subclass = event_subclass;
1120	ev_msg.event_code = event_code;
1121
1122	if (event_data == NULL) {
1123	event_data = &ev_data;
1124	event_data_len = sizeof (struct net_event_data);
1125	}
1126
1127	strlcpy(&event_data->if_name[`0`], ifp->if_name, IFNAMSIZ);
1128	event_data->if_family = ifp->if_family;
1129	event_data->if_unit = (u_int32_t)ifp->if_unit;
1130
1131	ev_msg.dv[`0`].data_length = event_data_len;
1132	ev_msg.dv[`0`].data_ptr = event_data;
1133	ev_msg.dv[`1`].data_length = `0`;
1134
1135	/ Don't update interface generation for quality and RRC state changess /
1136	bool update_generation = (event_subclass != KEV_DL_SUBCLASS \|\|
1137	(event_code != KEV_DL_LINK_QUALITY_METRIC_CHANGED &&
1138	event_code != KEV_DL_RRC_STATE_CHANGED));
1139
1140	dlil_event_internal(ifp, &ev_msg, update_generation);
1141	}
1142
1143	__private_extern__ int
1144	dlil_alloc_local_stats(struct ifnet *ifp)
1145	{
1146	int ret = EINVAL;
1147	void buf, base, **pbuf;
1148
1149	if (ifp == NULL)
1150	goto end;
1151
1152	if (ifp->if_tcp_stat == NULL && ifp->if_udp_stat == NULL) {
1153	/ allocate tcpstat_local structure /
1154	buf = zalloc(dlif_tcpstat_zone);
1155	if (buf == NULL) {
1156	ret = ENOMEM;
1157	goto end;
1158	}
1159	bzero(buf, dlif_tcpstat_bufsize);
1160
1161	/ Get the 64-bit aligned base address for this object /
1162	base = (void )P2ROUNDUP((intptr_t)buf + sizeof* (u_int64_t),
1163	sizeof (u_int64_t));
1164	VERIFY(((intptr_t)base + dlif_tcpstat_size) <=
1165	((intptr_t)buf + dlif_tcpstat_bufsize));
1166
1167	/*
1168	* Wind back a pointer size from the aligned base and
1169	* save the original address so we can free it later.
1170	*/
1171	pbuf = (void )((intptr_t)base - sizeof** (void *));
1172	*pbuf = buf;
1173	ifp->if_tcp_stat = base;
1174
1175	/ allocate udpstat_local structure /
1176	buf = zalloc(dlif_udpstat_zone);
1177	if (buf == NULL) {
1178	ret = ENOMEM;
1179	goto end;
1180	}
1181	bzero(buf, dlif_udpstat_bufsize);
1182
1183	/ Get the 64-bit aligned base address for this object /
1184	base = (void )P2ROUNDUP((intptr_t)buf + sizeof* (u_int64_t),
1185	sizeof (u_int64_t));
1186	VERIFY(((intptr_t)base + dlif_udpstat_size) <=
1187	((intptr_t)buf + dlif_udpstat_bufsize));
1188
1189	/*
1190	* Wind back a pointer size from the aligned base and
1191	* save the original address so we can free it later.
1192	*/
1193	pbuf = (void )((intptr_t)base - sizeof** (void *));
1194	*pbuf = buf;
1195	ifp->if_udp_stat = base;
1196
1197	VERIFY(IS_P2ALIGNED(ifp->if_tcp_stat, sizeof (u_int64_t)) &&
1198	IS_P2ALIGNED(ifp->if_udp_stat, sizeof (u_int64_t)));
1199
1200	ret = `0`;
1201	}
1202
1203	if (ifp->if_ipv4_stat == NULL) {
1204	MALLOC(ifp->if_ipv4_stat, struct if_tcp_ecn_stat *,
1205	sizeof (struct if_tcp_ecn_stat), M_TEMP, M_WAITOK\|M_ZERO);
1206	if (ifp->if_ipv4_stat == NULL) {
1207	ret = ENOMEM;
1208	goto end;
1209	}
1210	}
1211
1212	if (ifp->if_ipv6_stat == NULL) {
1213	MALLOC(ifp->if_ipv6_stat, struct if_tcp_ecn_stat *,
1214	sizeof (struct if_tcp_ecn_stat), M_TEMP, M_WAITOK\|M_ZERO);
1215	if (ifp->if_ipv6_stat == NULL) {
1216	ret = ENOMEM;
1217	goto end;
1218	}
1219	}
1220	end:
1221	if (ret != `0`) {
1222	if (ifp->if_tcp_stat != NULL) {
1223	pbuf = (void **)
1224	((intptr_t)ifp->if_tcp_stat - sizeof (void *));
1225	zfree(dlif_tcpstat_zone, *pbuf);
1226	ifp->if_tcp_stat = NULL;
1227	}
1228	if (ifp->if_udp_stat != NULL) {
1229	pbuf = (void **)
1230	((intptr_t)ifp->if_udp_stat - sizeof (void *));
1231	zfree(dlif_udpstat_zone, *pbuf);
1232	ifp->if_udp_stat = NULL;
1233	}
1234	if (ifp->if_ipv4_stat != NULL) {
1235	FREE(ifp->if_ipv4_stat, M_TEMP);
1236	ifp->if_ipv4_stat = NULL;
1237	}
1238	if (ifp->if_ipv6_stat != NULL) {
1239	FREE(ifp->if_ipv6_stat, M_TEMP);
1240	ifp->if_ipv6_stat = NULL;
1241	}
1242	}
1243
1244	return (ret);
1245	}
1246
1247	static int
1248	dlil_create_input_thread(ifnet_t ifp, struct dlil_threading_info *inp)
1249	{
1250	thread_continue_t func;
1251	u_int32_t limit;
1252	int error;
1253
1254	/ NULL ifp indicates the main input thread, called at dlil_init time /
1255	if (ifp == NULL) {
1256	func = dlil_main_input_thread_func;
1257	VERIFY(inp == dlil_main_input_thread);
1258	(void) strlcat(inp->input_name,
1259	"main_input", DLIL_THREADNAME_LEN);
1260	} else if (net_rxpoll && (ifp->if_eflags & IFEF_RXPOLL)) {
1261	func = dlil_rxpoll_input_thread_func;
1262	VERIFY(inp != dlil_main_input_thread);
1263	(void) snprintf(inp->input_name, DLIL_THREADNAME_LEN,
1264	"%s_input_poll", if_name(ifp));
1265	} else {
1266	func = dlil_input_thread_func;
1267	VERIFY(inp != dlil_main_input_thread);
1268	(void) snprintf(inp->input_name, DLIL_THREADNAME_LEN,
1269	"%s_input", if_name(ifp));
1270	}
1271	VERIFY(inp->input_thr == THREAD_NULL);
1272
1273	inp->lck_grp = lck_grp_alloc_init(inp->input_name, dlil_grp_attributes);
1274	lck_mtx_init(&inp->input_lck, inp->lck_grp, dlil_lck_attributes);
1275
1276	inp->mode = IFNET_MODEL_INPUT_POLL_OFF;
1277	inp->ifp = ifp; / NULL for main input thread /
1278
1279	net_timerclear(&inp->mode_holdtime);
1280	net_timerclear(&inp->mode_lasttime);
1281	net_timerclear(&inp->sample_holdtime);
1282	net_timerclear(&inp->sample_lasttime);
1283	net_timerclear(&inp->dbg_lasttime);
1284
1285	/*
1286	* For interfaces that support opportunistic polling, set the
1287	* low and high watermarks for outstanding inbound packets/bytes.
1288	* Also define freeze times for transitioning between modes
1289	* and updating the average.
1290	*/
1291	if (ifp != NULL && net_rxpoll && (ifp->if_eflags & IFEF_RXPOLL)) {
1292	limit = MAX(if_rcvq_maxlen, IF_RCVQ_MINLEN);
1293	(void) dlil_rxpoll_set_params(ifp, NULL, FALSE);
1294	} else {
1295	limit = (u_int32_t)-`1`;
1296	}
1297
1298	_qinit(&inp->rcvq_pkts, Q_DROPTAIL, limit, QP_MBUF);
1299	if (inp == dlil_main_input_thread) {
1300	struct dlil_main_threading_info *inpm =
1301	(struct dlil_main_threading_info *)inp;
1302	_qinit(&inpm->lo_rcvq_pkts, Q_DROPTAIL, limit, QP_MBUF);
1303	}
1304
1305	error = kernel_thread_start(func, inp, &inp->input_thr);
1306	if (error == KERN_SUCCESS) {
1307	ml_thread_policy(inp->input_thr, MACHINE_GROUP,
1308	(MACHINE_NETWORK_GROUP\|MACHINE_NETWORK_NETISR));
1309	/*
1310	* We create an affinity set so that the matching workloop
1311	* thread or the starter thread (for loopback) can be
1312	* scheduled on the same processor set as the input thread.
1313	*/
1314	if (net_affinity) {
1315	struct thread *tp = inp->input_thr;
1316	u_int32_t tag;
1317	/*
1318	* Randomize to reduce the probability
1319	* of affinity tag namespace collision.
1320	*/
1321	read_frandom(&tag, sizeof (tag));
1322	if (dlil_affinity_set(tp, tag) == KERN_SUCCESS) {
1323	thread_reference(tp);
1324	inp->tag = tag;
1325	inp->net_affinity = TRUE;
1326	}
1327	}
1328	} else if (inp == dlil_main_input_thread) {
1329	panic_plain("%s: couldn't create main input thread", __func__);
1330	/ NOTREACHED /
1331	} else {
1332	panic_plain("%s: couldn't create %s input thread", __func__,
1333	if_name(ifp));
1334	/ NOTREACHED /
1335	}
1336	OSAddAtomic(`1`, &cur_dlil_input_threads);
1337
1338	return (error);
1339	}
1340
1341	#if TEST_INPUT_THREAD_TERMINATION
1342	static int
1343	sysctl_input_thread_termination_spin SYSCTL_HANDLER_ARGS
1344	{
1345	#pragma unused(arg1, arg2)
1346	uint32_t i;
1347	int err;
1348
1349	i = if_input_thread_termination_spin;
1350
1351	err = sysctl_handle_int(oidp, &i, `0`, req);
1352	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
1353	return (err);
1354
1355	if (net_rxpoll == `0`)
1356	return (ENXIO);
1357
1358	if_input_thread_termination_spin = i;
1359	return (err);
1360	}
1361	#endif /* TEST_INPUT_THREAD_TERMINATION */
1362
1363	static void
1364	dlil_clean_threading_info(struct dlil_threading_info *inp)
1365	{
1366	lck_mtx_destroy(&inp->input_lck, inp->lck_grp);
1367	lck_grp_free(inp->lck_grp);
1368
1369	inp->input_waiting = `0`;
1370	inp->wtot = `0`;
1371	bzero(inp->input_name, sizeof (inp->input_name));
1372	inp->ifp = NULL;
1373	VERIFY(qhead(&inp->rcvq_pkts) == NULL && qempty(&inp->rcvq_pkts));
1374	qlimit(&inp->rcvq_pkts) = `0`;
1375	bzero(&inp->stats, sizeof (inp->stats));
1376
1377	VERIFY(!inp->net_affinity);
1378	inp->input_thr = THREAD_NULL;
1379	VERIFY(inp->wloop_thr == THREAD_NULL);
1380	VERIFY(inp->poll_thr == THREAD_NULL);
1381	VERIFY(inp->tag == `0`);
1382
1383	inp->mode = IFNET_MODEL_INPUT_POLL_OFF;
1384	bzero(&inp->tstats, sizeof (inp->tstats));
1385	bzero(&inp->pstats, sizeof (inp->pstats));
1386	bzero(&inp->sstats, sizeof (inp->sstats));
1387
1388	net_timerclear(&inp->mode_holdtime);
1389	net_timerclear(&inp->mode_lasttime);
1390	net_timerclear(&inp->sample_holdtime);
1391	net_timerclear(&inp->sample_lasttime);
1392	net_timerclear(&inp->dbg_lasttime);
1393
1394	#if IFNET_INPUT_SANITY_CHK
1395	inp->input_mbuf_cnt = `0`;
1396	#endif /* IFNET_INPUT_SANITY_CHK */
1397	}
1398
1399	static void
1400	dlil_terminate_input_thread(struct dlil_threading_info *inp)
1401	{
1402	struct ifnet *ifp = inp->ifp;
1403
1404	VERIFY(current_thread() == inp->input_thr);
1405	VERIFY(inp != dlil_main_input_thread);
1406
1407	OSAddAtomic(-`1`, &cur_dlil_input_threads);
1408
1409	#if TEST_INPUT_THREAD_TERMINATION
1410	{ / do something useless that won't get optimized away /
1411	uint32_t v = `1`;
1412	for (uint32_t i = `0`;
1413	i < if_input_thread_termination_spin;
1414	i++) {
1415	v = (i + `1`) * v;
1416	}
1417	printf("the value is %d\n", v);
1418	}
1419	#endif /* TEST_INPUT_THREAD_TERMINATION */
1420
1421	lck_mtx_lock_spin(&inp->input_lck);
1422	VERIFY((inp->input_waiting & DLIL_INPUT_TERMINATE) != `0`);
1423	inp->input_waiting \|= DLIL_INPUT_TERMINATE_COMPLETE;
1424	wakeup_one((caddr_t)&inp->input_waiting);
1425	lck_mtx_unlock(&inp->input_lck);
1426
1427	/ for the extra refcnt from kernel_thread_start() /
1428	thread_deallocate(current_thread());
1429
1430	if (dlil_verbose) {
1431	printf("%s: input thread terminated\n",
1432	if_name(ifp));
1433	}
1434
1435	/ this is the end /
1436	thread_terminate(current_thread());
1437	/ NOTREACHED /
1438	}
1439
1440	static kern_return_t
1441	dlil_affinity_set(struct thread *tp, u_int32_t tag)
1442	{
1443	thread_affinity_policy_data_t policy;
1444
1445	bzero(&policy, sizeof (policy));
1446	policy.affinity_tag = tag;
1447	return (thread_policy_set(tp, THREAD_AFFINITY_POLICY,
1448	(thread_policy_t)&policy, THREAD_AFFINITY_POLICY_COUNT));
1449	}
1450
1451	void
1452	dlil_init(void)
1453	{
1454	thread_t thread = THREAD_NULL;
1455
1456	/*
1457	* The following fields must be 64-bit aligned for atomic operations.
1458	*/
1459	IF_DATA_REQUIRE_ALIGNED_64(ifi_ipackets);
1460	IF_DATA_REQUIRE_ALIGNED_64(ifi_ierrors);
1461	IF_DATA_REQUIRE_ALIGNED_64(ifi_opackets);
1462	IF_DATA_REQUIRE_ALIGNED_64(ifi_oerrors);
1463	IF_DATA_REQUIRE_ALIGNED_64(ifi_collisions);
1464	IF_DATA_REQUIRE_ALIGNED_64(ifi_ibytes);
1465	IF_DATA_REQUIRE_ALIGNED_64(ifi_obytes);
1466	IF_DATA_REQUIRE_ALIGNED_64(ifi_imcasts);
1467	IF_DATA_REQUIRE_ALIGNED_64(ifi_omcasts);
1468	IF_DATA_REQUIRE_ALIGNED_64(ifi_iqdrops);
1469	IF_DATA_REQUIRE_ALIGNED_64(ifi_noproto);
1470	IF_DATA_REQUIRE_ALIGNED_64(ifi_alignerrs);
1471	IF_DATA_REQUIRE_ALIGNED_64(ifi_dt_bytes);
1472	IF_DATA_REQUIRE_ALIGNED_64(ifi_fpackets);
1473	IF_DATA_REQUIRE_ALIGNED_64(ifi_fbytes);
1474
1475	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_ipackets);
1476	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_ierrors);
1477	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_opackets);
1478	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_oerrors);
1479	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_collisions);
1480	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_ibytes);
1481	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_obytes);
1482	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_imcasts);
1483	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_omcasts);
1484	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_iqdrops);
1485	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_noproto);
1486	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_alignerrs);
1487	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_dt_bytes);
1488	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_fpackets);
1489	IFNET_IF_DATA_REQUIRE_ALIGNED_64(ifi_fbytes);
1490
1491	/*
1492	* These IF_HWASSIST_ flags must be equal to their IFNET_* counterparts.
1493	*/
1494	_CASSERT(IF_HWASSIST_CSUM_IP == IFNET_CSUM_IP);
1495	_CASSERT(IF_HWASSIST_CSUM_TCP == IFNET_CSUM_TCP);
1496	_CASSERT(IF_HWASSIST_CSUM_UDP == IFNET_CSUM_UDP);
1497	_CASSERT(IF_HWASSIST_CSUM_IP_FRAGS == IFNET_CSUM_FRAGMENT);
1498	_CASSERT(IF_HWASSIST_CSUM_FRAGMENT == IFNET_IP_FRAGMENT);
1499	_CASSERT(IF_HWASSIST_CSUM_TCPIPV6 == IFNET_CSUM_TCPIPV6);
1500	_CASSERT(IF_HWASSIST_CSUM_UDPIPV6 == IFNET_CSUM_UDPIPV6);
1501	_CASSERT(IF_HWASSIST_CSUM_FRAGMENT_IPV6 == IFNET_IPV6_FRAGMENT);
1502	_CASSERT(IF_HWASSIST_CSUM_PARTIAL == IFNET_CSUM_PARTIAL);
1503	_CASSERT(IF_HWASSIST_CSUM_ZERO_INVERT == IFNET_CSUM_ZERO_INVERT);
1504	_CASSERT(IF_HWASSIST_VLAN_TAGGING == IFNET_VLAN_TAGGING);
1505	_CASSERT(IF_HWASSIST_VLAN_MTU == IFNET_VLAN_MTU);
1506	_CASSERT(IF_HWASSIST_TSO_V4 == IFNET_TSO_IPV4);
1507	_CASSERT(IF_HWASSIST_TSO_V6 == IFNET_TSO_IPV6);
1508
1509	/*
1510	* ... as well as the mbuf checksum flags counterparts.
1511	*/
1512	_CASSERT(CSUM_IP == IF_HWASSIST_CSUM_IP);
1513	_CASSERT(CSUM_TCP == IF_HWASSIST_CSUM_TCP);
1514	_CASSERT(CSUM_UDP == IF_HWASSIST_CSUM_UDP);
1515	_CASSERT(CSUM_IP_FRAGS == IF_HWASSIST_CSUM_IP_FRAGS);
1516	_CASSERT(CSUM_FRAGMENT == IF_HWASSIST_CSUM_FRAGMENT);
1517	_CASSERT(CSUM_TCPIPV6 == IF_HWASSIST_CSUM_TCPIPV6);
1518	_CASSERT(CSUM_UDPIPV6 == IF_HWASSIST_CSUM_UDPIPV6);
1519	_CASSERT(CSUM_FRAGMENT_IPV6 == IF_HWASSIST_CSUM_FRAGMENT_IPV6);
1520	_CASSERT(CSUM_PARTIAL == IF_HWASSIST_CSUM_PARTIAL);
1521	_CASSERT(CSUM_ZERO_INVERT == IF_HWASSIST_CSUM_ZERO_INVERT);
1522	_CASSERT(CSUM_VLAN_TAG_VALID == IF_HWASSIST_VLAN_TAGGING);
1523
1524	/*
1525	* Make sure we have at least IF_LLREACH_MAXLEN in the llreach info.
1526	*/
1527	_CASSERT(IF_LLREACH_MAXLEN <= IF_LLREACHINFO_ADDRLEN);
1528	_CASSERT(IFNET_LLREACHINFO_ADDRLEN == IF_LLREACHINFO_ADDRLEN);
1529
1530	_CASSERT(IFRLOGF_DLIL == IFNET_LOGF_DLIL);
1531	_CASSERT(IFRLOGF_FAMILY == IFNET_LOGF_FAMILY);
1532	_CASSERT(IFRLOGF_DRIVER == IFNET_LOGF_DRIVER);
1533	_CASSERT(IFRLOGF_FIRMWARE == IFNET_LOGF_FIRMWARE);
1534
1535	_CASSERT(IFRLOGCAT_CONNECTIVITY == IFNET_LOGCAT_CONNECTIVITY);
1536	_CASSERT(IFRLOGCAT_QUALITY == IFNET_LOGCAT_QUALITY);
1537	_CASSERT(IFRLOGCAT_PERFORMANCE == IFNET_LOGCAT_PERFORMANCE);
1538
1539	_CASSERT(IFRTYPE_FAMILY_ANY == IFNET_FAMILY_ANY);
1540	_CASSERT(IFRTYPE_FAMILY_LOOPBACK == IFNET_FAMILY_LOOPBACK);
1541	_CASSERT(IFRTYPE_FAMILY_ETHERNET == IFNET_FAMILY_ETHERNET);
1542	_CASSERT(IFRTYPE_FAMILY_SLIP == IFNET_FAMILY_SLIP);
1543	_CASSERT(IFRTYPE_FAMILY_TUN == IFNET_FAMILY_TUN);
1544	_CASSERT(IFRTYPE_FAMILY_VLAN == IFNET_FAMILY_VLAN);
1545	_CASSERT(IFRTYPE_FAMILY_PPP == IFNET_FAMILY_PPP);
1546	_CASSERT(IFRTYPE_FAMILY_PVC == IFNET_FAMILY_PVC);
1547	_CASSERT(IFRTYPE_FAMILY_DISC == IFNET_FAMILY_DISC);
1548	_CASSERT(IFRTYPE_FAMILY_MDECAP == IFNET_FAMILY_MDECAP);
1549	_CASSERT(IFRTYPE_FAMILY_GIF == IFNET_FAMILY_GIF);
1550	_CASSERT(IFRTYPE_FAMILY_FAITH == IFNET_FAMILY_FAITH);
1551	_CASSERT(IFRTYPE_FAMILY_STF == IFNET_FAMILY_STF);
1552	_CASSERT(IFRTYPE_FAMILY_FIREWIRE == IFNET_FAMILY_FIREWIRE);
1553	_CASSERT(IFRTYPE_FAMILY_BOND == IFNET_FAMILY_BOND);
1554	_CASSERT(IFRTYPE_FAMILY_CELLULAR == IFNET_FAMILY_CELLULAR);
1555
1556	_CASSERT(IFRTYPE_SUBFAMILY_ANY == IFNET_SUBFAMILY_ANY);
1557	_CASSERT(IFRTYPE_SUBFAMILY_USB == IFNET_SUBFAMILY_USB);
1558	_CASSERT(IFRTYPE_SUBFAMILY_BLUETOOTH == IFNET_SUBFAMILY_BLUETOOTH);
1559	_CASSERT(IFRTYPE_SUBFAMILY_WIFI == IFNET_SUBFAMILY_WIFI);
1560	_CASSERT(IFRTYPE_SUBFAMILY_THUNDERBOLT == IFNET_SUBFAMILY_THUNDERBOLT);
1561	_CASSERT(IFRTYPE_SUBFAMILY_RESERVED == IFNET_SUBFAMILY_RESERVED);
1562	_CASSERT(IFRTYPE_SUBFAMILY_INTCOPROC == IFNET_SUBFAMILY_INTCOPROC);
1563
1564	_CASSERT(DLIL_MODIDLEN == IFNET_MODIDLEN);
1565	_CASSERT(DLIL_MODARGLEN == IFNET_MODARGLEN);
1566
1567	PE_parse_boot_argn("net_affinity", &net_affinity,
1568	sizeof (net_affinity));
1569
1570	PE_parse_boot_argn("net_rxpoll", &net_rxpoll, sizeof (net_rxpoll));
1571
1572	PE_parse_boot_argn("net_rtref", &net_rtref, sizeof (net_rtref));
1573
1574	PE_parse_boot_argn("ifnet_debug", &ifnet_debug, sizeof (ifnet_debug));
1575
1576	dlif_size = (ifnet_debug == `0`) ? sizeof (struct dlil_ifnet) :
1577	sizeof (struct dlil_ifnet_dbg);
1578	/ Enforce 64-bit alignment for dlil_ifnet structure /
1579	dlif_bufsize = dlif_size + sizeof (void ) + sizeof* (u_int64_t);
1580	dlif_bufsize = P2ROUNDUP(dlif_bufsize, sizeof (u_int64_t));
1581	dlif_zone = zinit(dlif_bufsize, DLIF_ZONE_MAX * dlif_bufsize,
1582	`0`, DLIF_ZONE_NAME);
1583	if (dlif_zone == NULL) {
1584	panic_plain("%s: failed allocating %s", __func__,
1585	DLIF_ZONE_NAME);
1586	/ NOTREACHED /
1587	}
1588	zone_change(dlif_zone, Z_EXPAND, TRUE);
1589	zone_change(dlif_zone, Z_CALLERACCT, FALSE);
1590
1591	dlif_filt_size = sizeof (struct ifnet_filter);
1592	dlif_filt_zone = zinit(dlif_filt_size,
1593	DLIF_FILT_ZONE_MAX * dlif_filt_size, `0`, DLIF_FILT_ZONE_NAME);
1594	if (dlif_filt_zone == NULL) {
1595	panic_plain("%s: failed allocating %s", __func__,
1596	DLIF_FILT_ZONE_NAME);
1597	/ NOTREACHED /
1598	}
1599	zone_change(dlif_filt_zone, Z_EXPAND, TRUE);
1600	zone_change(dlif_filt_zone, Z_CALLERACCT, FALSE);
1601
1602	dlif_phash_size = sizeof (struct proto_hash_entry) * PROTO_HASH_SLOTS;
1603	dlif_phash_zone = zinit(dlif_phash_size,
1604	DLIF_PHASH_ZONE_MAX * dlif_phash_size, `0`, DLIF_PHASH_ZONE_NAME);
1605	if (dlif_phash_zone == NULL) {
1606	panic_plain("%s: failed allocating %s", __func__,
1607	DLIF_PHASH_ZONE_NAME);
1608	/ NOTREACHED /
1609	}
1610	zone_change(dlif_phash_zone, Z_EXPAND, TRUE);
1611	zone_change(dlif_phash_zone, Z_CALLERACCT, FALSE);
1612
1613	dlif_proto_size = sizeof (struct if_proto);
1614	dlif_proto_zone = zinit(dlif_proto_size,
1615	DLIF_PROTO_ZONE_MAX * dlif_proto_size, `0`, DLIF_PROTO_ZONE_NAME);
1616	if (dlif_proto_zone == NULL) {
1617	panic_plain("%s: failed allocating %s", __func__,
1618	DLIF_PROTO_ZONE_NAME);
1619	/ NOTREACHED /
1620	}
1621	zone_change(dlif_proto_zone, Z_EXPAND, TRUE);
1622	zone_change(dlif_proto_zone, Z_CALLERACCT, FALSE);
1623
1624	dlif_tcpstat_size = sizeof (struct tcpstat_local);
1625	/ Enforce 64-bit alignment for tcpstat_local structure /
1626	dlif_tcpstat_bufsize =
1627	dlif_tcpstat_size + sizeof (void ) + sizeof* (u_int64_t);
1628	dlif_tcpstat_bufsize =
1629	P2ROUNDUP(dlif_tcpstat_bufsize, sizeof (u_int64_t));
1630	dlif_tcpstat_zone = zinit(dlif_tcpstat_bufsize,
1631	DLIF_TCPSTAT_ZONE_MAX * dlif_tcpstat_bufsize, `0`,
1632	DLIF_TCPSTAT_ZONE_NAME);
1633	if (dlif_tcpstat_zone == NULL) {
1634	panic_plain("%s: failed allocating %s", __func__,
1635	DLIF_TCPSTAT_ZONE_NAME);
1636	/ NOTREACHED /
1637	}
1638	zone_change(dlif_tcpstat_zone, Z_EXPAND, TRUE);
1639	zone_change(dlif_tcpstat_zone, Z_CALLERACCT, FALSE);
1640
1641	dlif_udpstat_size = sizeof (struct udpstat_local);
1642	/ Enforce 64-bit alignment for udpstat_local structure /
1643	dlif_udpstat_bufsize =
1644	dlif_udpstat_size + sizeof (void ) + sizeof* (u_int64_t);
1645	dlif_udpstat_bufsize =
1646	P2ROUNDUP(dlif_udpstat_bufsize, sizeof (u_int64_t));
1647	dlif_udpstat_zone = zinit(dlif_udpstat_bufsize,
1648	DLIF_TCPSTAT_ZONE_MAX * dlif_udpstat_bufsize, `0`,
1649	DLIF_UDPSTAT_ZONE_NAME);
1650	if (dlif_udpstat_zone == NULL) {
1651	panic_plain("%s: failed allocating %s", __func__,
1652	DLIF_UDPSTAT_ZONE_NAME);
1653	/ NOTREACHED /
1654	}
1655	zone_change(dlif_udpstat_zone, Z_EXPAND, TRUE);
1656	zone_change(dlif_udpstat_zone, Z_CALLERACCT, FALSE);
1657
1658	ifnet_llreach_init();
1659	eventhandler_lists_ctxt_init(&ifnet_evhdlr_ctxt);
1660
1661	TAILQ_INIT(&dlil_ifnet_head);
1662	TAILQ_INIT(&ifnet_head);
1663	TAILQ_INIT(&ifnet_detaching_head);
1664	TAILQ_INIT(&ifnet_ordered_head);
1665
1666	/ Setup the lock groups we will use /
1667	dlil_grp_attributes = lck_grp_attr_alloc_init();
1668
1669	dlil_lock_group = lck_grp_alloc_init("DLIL internal locks",
1670	dlil_grp_attributes);
1671	ifnet_lock_group = lck_grp_alloc_init("ifnet locks",
1672	dlil_grp_attributes);
1673	ifnet_head_lock_group = lck_grp_alloc_init("ifnet head lock",
1674	dlil_grp_attributes);
1675	ifnet_rcv_lock_group = lck_grp_alloc_init("ifnet rcv locks",
1676	dlil_grp_attributes);
1677	ifnet_snd_lock_group = lck_grp_alloc_init("ifnet snd locks",
1678	dlil_grp_attributes);
1679
1680	/ Setup the lock attributes we will use /
1681	dlil_lck_attributes = lck_attr_alloc_init();
1682
1683	ifnet_lock_attr = lck_attr_alloc_init();
1684
1685	lck_rw_init(&ifnet_head_lock, ifnet_head_lock_group,
1686	dlil_lck_attributes);
1687	lck_mtx_init(&dlil_ifnet_lock, dlil_lock_group, dlil_lck_attributes);
1688
1689	/ Setup interface flow control related items /
1690	lck_mtx_init(&ifnet_fc_lock, dlil_lock_group, dlil_lck_attributes);
1691
1692	ifnet_fc_zone_size = sizeof (struct ifnet_fc_entry);
1693	ifnet_fc_zone = zinit(ifnet_fc_zone_size,
1694	IFNET_FC_ZONE_MAX * ifnet_fc_zone_size, `0`, IFNET_FC_ZONE_NAME);
1695	if (ifnet_fc_zone == NULL) {
1696	panic_plain("%s: failed allocating %s", __func__,
1697	IFNET_FC_ZONE_NAME);
1698	/ NOTREACHED /
1699	}
1700	zone_change(ifnet_fc_zone, Z_EXPAND, TRUE);
1701	zone_change(ifnet_fc_zone, Z_CALLERACCT, FALSE);
1702
1703	/ Initialize interface address subsystem /
1704	ifa_init();
1705
1706	#if PF
1707	/ Initialize the packet filter /
1708	pfinit();
1709	#endif /* PF */
1710
1711	/ Initialize queue algorithms /
1712	classq_init();
1713
1714	/ Initialize packet schedulers /
1715	pktsched_init();
1716
1717	/ Initialize flow advisory subsystem /
1718	flowadv_init();
1719
1720	/ Initialize the pktap virtual interface /
1721	pktap_init();
1722
1723	/ Initialize the service class to dscp map /
1724	net_qos_map_init();
1725
1726	/ Initialize the interface port list /
1727	if_ports_used_init();
1728
1729	/ Initialize the interface low power mode event handler /
1730	if_low_power_evhdlr_init();
1731
1732	#if DEBUG \|\| DEVELOPMENT
1733	/ Run self-tests /
1734	dlil_verify_sum16();
1735	#endif /* DEBUG \|\| DEVELOPMENT */
1736
1737	/ Initialize link layer table /
1738	lltable_glbl_init();
1739
1740	/*
1741	* Create and start up the main DLIL input thread and the interface
1742	* detacher threads once everything is initialized.
1743	*/
1744	dlil_create_input_thread(NULL, dlil_main_input_thread);
1745
1746	if (kernel_thread_start(ifnet_detacher_thread_func,
1747	NULL, &thread) != KERN_SUCCESS) {
1748	panic_plain("%s: couldn't create detacher thread", __func__);
1749	/ NOTREACHED /
1750	}
1751	thread_deallocate(thread);
1752
1753	}
1754
1755	static void
1756	if_flt_monitor_busy(struct ifnet *ifp)
1757	{
1758	LCK_MTX_ASSERT(&ifp->if_flt_lock, LCK_MTX_ASSERT_OWNED);
1759
1760	++ifp->if_flt_busy;
1761	VERIFY(ifp->if_flt_busy != `0`);
1762	}
1763
1764	static void
1765	if_flt_monitor_unbusy(struct ifnet *ifp)
1766	{
1767	if_flt_monitor_leave(ifp);
1768	}
1769
1770	static void
1771	if_flt_monitor_enter(struct ifnet *ifp)
1772	{
1773	LCK_MTX_ASSERT(&ifp->if_flt_lock, LCK_MTX_ASSERT_OWNED);
1774
1775	while (ifp->if_flt_busy) {
1776	++ifp->if_flt_waiters;
1777	(void) msleep(&ifp->if_flt_head, &ifp->if_flt_lock,
1778	(PZERO - `1`), "if_flt_monitor", NULL);
1779	}
1780	if_flt_monitor_busy(ifp);
1781	}
1782
1783	static void
1784	if_flt_monitor_leave(struct ifnet *ifp)
1785	{
1786	LCK_MTX_ASSERT(&ifp->if_flt_lock, LCK_MTX_ASSERT_OWNED);
1787
1788	VERIFY(ifp->if_flt_busy != `0`);
1789	--ifp->if_flt_busy;
1790
1791	if (ifp->if_flt_busy == `0` && ifp->if_flt_waiters > `0`) {
1792	ifp->if_flt_waiters = `0`;
1793	wakeup(&ifp->if_flt_head);
1794	}
1795	}
1796
1797	__private_extern__ int
1798	dlil_attach_filter(struct ifnet ifp, const* struct iff_filter *if_filter,
1799	interface_filter_t *filter_ref, u_int32_t flags)
1800	{
1801	int retval = `0`;
1802	struct ifnet_filter *filter = NULL;
1803
1804	ifnet_head_lock_shared();
1805	/ Check that the interface is in the global list /
1806	if (!ifnet_lookup(ifp)) {
1807	retval = ENXIO;
1808	goto done;
1809	}
1810
1811	filter = zalloc(dlif_filt_zone);
1812	if (filter == NULL) {
1813	retval = ENOMEM;
1814	goto done;
1815	}
1816	bzero(filter, dlif_filt_size);
1817
1818	/ refcnt held above during lookup /
1819	filter->filt_flags = flags;
1820	filter->filt_ifp = ifp;
1821	filter->filt_cookie = if_filter->iff_cookie;
1822	filter->filt_name = if_filter->iff_name;
1823	filter->filt_protocol = if_filter->iff_protocol;
1824	/*
1825	* Do not install filter callbacks for internal coproc interface
1826	*/
1827	if (!IFNET_IS_INTCOPROC(ifp)) {
1828	filter->filt_input = if_filter->iff_input;
1829	filter->filt_output = if_filter->iff_output;
1830	filter->filt_event = if_filter->iff_event;
1831	filter->filt_ioctl = if_filter->iff_ioctl;
1832	}
1833	filter->filt_detached = if_filter->iff_detached;
1834
1835	lck_mtx_lock(&ifp->if_flt_lock);
1836	if_flt_monitor_enter(ifp);
1837
1838	LCK_MTX_ASSERT(&ifp->if_flt_lock, LCK_MTX_ASSERT_OWNED);
1839	TAILQ_INSERT_TAIL(&ifp->if_flt_head, filter, filt_next);
1840
1841	if_flt_monitor_leave(ifp);
1842	lck_mtx_unlock(&ifp->if_flt_lock);
1843
1844	*filter_ref = filter;
1845
1846	/*
1847	* Bump filter count and route_generation ID to let TCP
1848	* know it shouldn't do TSO on this connection
1849	*/
1850	if ((filter->filt_flags & DLIL_IFF_TSO) == `0`) {
1851	OSAddAtomic(`1`, &dlil_filter_disable_tso_count);
1852	routegenid_update();
1853	}
1854	OSIncrementAtomic64(&net_api_stats.nas_iflt_attach_count);
1855	INC_ATOMIC_INT64_LIM(net_api_stats.nas_iflt_attach_total);
1856	if ((filter->filt_flags & DLIL_IFF_INTERNAL)) {
1857	INC_ATOMIC_INT64_LIM(net_api_stats.nas_iflt_attach_os_total);
1858	}
1859	if (dlil_verbose) {
1860	printf("%s: %s filter attached\n", if_name(ifp),
1861	if_filter->iff_name);
1862	}
1863	done:
1864	ifnet_head_done();
1865	if (retval != `0` && ifp != NULL) {
1866	DLIL_PRINTF("%s: failed to attach %s (err=%d)\n",
1867	if_name(ifp), if_filter->iff_name, retval);
1868	}
1869	if (retval != `0` && filter != NULL)
1870	zfree(dlif_filt_zone, filter);
1871
1872	return (retval);
1873	}
1874
1875	static int
1876	dlil_detach_filter_internal(interface_filter_t filter, int detached)
1877	{
1878	int retval = `0`;
1879
1880	if (detached == `0`) {
1881	ifnet_t ifp = NULL;
1882
1883	ifnet_head_lock_shared();
1884	TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
1885	interface_filter_t entry = NULL;
1886
1887	lck_mtx_lock(&ifp->if_flt_lock);
1888	TAILQ_FOREACH(entry, &ifp->if_flt_head, filt_next) {
1889	if (entry != filter \|\| entry->filt_skip)
1890	continue;
1891	/*
1892	* We've found a match; since it's possible
1893	* that the thread gets blocked in the monitor,
1894	* we do the lock dance. Interface should
1895	* not be detached since we still have a use
1896	* count held during filter attach.
1897	*/
1898	entry->filt_skip = `1`; / skip input/output /
1899	lck_mtx_unlock(&ifp->if_flt_lock);
1900	ifnet_head_done();
1901
1902	lck_mtx_lock(&ifp->if_flt_lock);
1903	if_flt_monitor_enter(ifp);
1904	LCK_MTX_ASSERT(&ifp->if_flt_lock,
1905	LCK_MTX_ASSERT_OWNED);
1906
1907	/ Remove the filter from the list /
1908	TAILQ_REMOVE(&ifp->if_flt_head, filter,
1909	filt_next);
1910
1911	if_flt_monitor_leave(ifp);
1912	lck_mtx_unlock(&ifp->if_flt_lock);
1913	if (dlil_verbose) {
1914	printf("%s: %s filter detached\n",
1915	if_name(ifp), filter->filt_name);
1916	}
1917	goto destroy;
1918	}
1919	lck_mtx_unlock(&ifp->if_flt_lock);
1920	}
1921	ifnet_head_done();
1922
1923	/ filter parameter is not a valid filter ref /
1924	retval = EINVAL;
1925	goto done;
1926	}
1927
1928	if (dlil_verbose)
1929	printf("%s filter detached\n", filter->filt_name);
1930
1931	destroy:
1932
1933	/ Call the detached function if there is one /
1934	if (filter->filt_detached)
1935	filter->filt_detached(filter->filt_cookie, filter->filt_ifp);
1936
1937	/*
1938	* Decrease filter count and route_generation ID to let TCP
1939	* know it should reevalute doing TSO or not
1940	*/
1941	if ((filter->filt_flags & DLIL_IFF_TSO) == `0`) {
1942	OSAddAtomic(-`1`, &dlil_filter_disable_tso_count);
1943	routegenid_update();
1944	}
1945
1946	VERIFY(OSDecrementAtomic64(&net_api_stats.nas_iflt_attach_count) > `0`);
1947
1948	/ Free the filter /
1949	zfree(dlif_filt_zone, filter);
1950	filter = NULL;
1951	done:
1952	if (retval != `0` && filter != NULL) {
1953	DLIL_PRINTF("failed to detach %s filter (err=%d)\n",
1954	filter->filt_name, retval);
1955	}
1956
1957	return (retval);
1958	}
1959
1960	__private_extern__ void
1961	dlil_detach_filter(interface_filter_t filter)
1962	{
1963	if (filter == NULL)
1964	return;
1965	dlil_detach_filter_internal(filter, `0`);
1966	}
1967
1968	/*
1969	* Main input thread:
1970	*
1971	* a) handles all inbound packets for lo0
1972	* b) handles all inbound packets for interfaces with no dedicated
1973	* input thread (e.g. anything but Ethernet/PDP or those that support
1974	* opportunistic polling.)
1975	* c) protocol registrations
1976	* d) packet injections
1977	*/
1978	__attribute__((noreturn))
1979	static void
1980	dlil_main_input_thread_func(void *v, wait_result_t w)
1981	{
1982	#pragma unused(w)
1983	struct dlil_main_threading_info *inpm = v;
1984	struct dlil_threading_info *inp = v;
1985
1986	VERIFY(inp == dlil_main_input_thread);
1987	VERIFY(inp->ifp == NULL);
1988	VERIFY(inp->mode == IFNET_MODEL_INPUT_POLL_OFF);
1989
1990	while (`1`) {
1991	struct mbuf m = NULL, m_loop = NULL;
1992	u_int32_t m_cnt, m_cnt_loop;
1993	boolean_t proto_req;
1994
1995	lck_mtx_lock_spin(&inp->input_lck);
1996
1997	/ Wait until there is work to be done /
1998	while (!(inp->input_waiting & ~DLIL_INPUT_RUNNING)) {
1999	inp->input_waiting &= ~DLIL_INPUT_RUNNING;
2000	(void) msleep(&inp->input_waiting, &inp->input_lck,
2001	(PZERO - `1`) \| PSPIN, inp->input_name, NULL);
2002	}
2003
2004	inp->input_waiting \|= DLIL_INPUT_RUNNING;
2005	inp->input_waiting &= ~DLIL_INPUT_WAITING;
2006
2007	/ Main input thread cannot be terminated /
2008	VERIFY(!(inp->input_waiting & DLIL_INPUT_TERMINATE));
2009
2010	proto_req = (inp->input_waiting &
2011	(DLIL_PROTO_WAITING \| DLIL_PROTO_REGISTER));
2012
2013	/ Packets for non-dedicated interfaces other than lo0 /
2014	m_cnt = qlen(&inp->rcvq_pkts);
2015	m = _getq_all(&inp->rcvq_pkts, NULL, NULL, NULL);
2016
2017	/ Packets exclusive to lo0 /
2018	m_cnt_loop = qlen(&inpm->lo_rcvq_pkts);
2019	m_loop = _getq_all(&inpm->lo_rcvq_pkts, NULL, NULL, NULL);
2020
2021	inp->wtot = `0`;
2022
2023	lck_mtx_unlock(&inp->input_lck);
2024
2025	/*
2026	* NOTE warning %%% attention !!!!
2027	* We should think about putting some thread starvation
2028	* safeguards if we deal with long chains of packets.
2029	*/
2030	if (m_loop != NULL)
2031	dlil_input_packet_list_extended(lo_ifp, m_loop,
2032	m_cnt_loop, inp->mode);
2033
2034	if (m != NULL)
2035	dlil_input_packet_list_extended(NULL, m,
2036	m_cnt, inp->mode);
2037
2038	if (proto_req)
2039	proto_input_run();
2040	}
2041
2042	/ NOTREACHED /
2043	VERIFY(`0`); / we should never get here /
2044	}
2045
2046	/*
2047	* Input thread for interfaces with legacy input model.
2048	*/
2049	static void
2050	dlil_input_thread_func(void *v, wait_result_t w)
2051	{
2052	#pragma unused(w)
2053	char thread_name[MAXTHREADNAMESIZE];
2054	struct dlil_threading_info *inp = v;
2055	struct ifnet *ifp = inp->ifp;
2056
2057	/ Construct the name for this thread, and then apply it. /
2058	bzero(thread_name, sizeof(thread_name));
2059	snprintf(thread_name, sizeof(thread_name), "dlil_input_%s", ifp->if_xname);
2060	thread_set_thread_name(inp->input_thr, thread_name);
2061
2062	VERIFY(inp != dlil_main_input_thread);
2063	VERIFY(ifp != NULL);
2064	VERIFY(!(ifp->if_eflags & IFEF_RXPOLL) \|\| !net_rxpoll);
2065	VERIFY(inp->mode == IFNET_MODEL_INPUT_POLL_OFF);
2066
2067	while (`1`) {
2068	struct mbuf *m = NULL;
2069	u_int32_t m_cnt;
2070
2071	lck_mtx_lock_spin(&inp->input_lck);
2072
2073	/ Wait until there is work to be done /
2074	while (!(inp->input_waiting & ~DLIL_INPUT_RUNNING)) {
2075	inp->input_waiting &= ~DLIL_INPUT_RUNNING;
2076	(void) msleep(&inp->input_waiting, &inp->input_lck,
2077	(PZERO - `1`) \| PSPIN, inp->input_name, NULL);
2078	}
2079
2080	inp->input_waiting \|= DLIL_INPUT_RUNNING;
2081	inp->input_waiting &= ~DLIL_INPUT_WAITING;
2082
2083	/*
2084	* Protocol registration and injection must always use
2085	* the main input thread; in theory the latter can utilize
2086	* the corresponding input thread where the packet arrived
2087	* on, but that requires our knowing the interface in advance
2088	* (and the benefits might not worth the trouble.)
2089	*/
2090	VERIFY(!(inp->input_waiting &
2091	(DLIL_PROTO_WAITING\|DLIL_PROTO_REGISTER)));
2092
2093	/ Packets for this interface /
2094	m_cnt = qlen(&inp->rcvq_pkts);
2095	m = _getq_all(&inp->rcvq_pkts, NULL, NULL, NULL);
2096
2097	if (inp->input_waiting & DLIL_INPUT_TERMINATE) {
2098	lck_mtx_unlock(&inp->input_lck);
2099
2100	/ Free up pending packets /
2101	if (m != NULL)
2102	mbuf_freem_list(m);
2103
2104	dlil_terminate_input_thread(inp);
2105	/ NOTREACHED /
2106	return;
2107	}
2108
2109	inp->wtot = `0`;
2110
2111	dlil_input_stats_sync(ifp, inp);
2112
2113	lck_mtx_unlock(&inp->input_lck);
2114
2115	/*
2116	* NOTE warning %%% attention !!!!
2117	* We should think about putting some thread starvation
2118	* safeguards if we deal with long chains of packets.
2119	*/
2120	if (m != NULL)
2121	dlil_input_packet_list_extended(NULL, m,
2122	m_cnt, inp->mode);
2123	}
2124
2125	/ NOTREACHED /
2126	VERIFY(`0`); / we should never get here /
2127	}
2128
2129	/*
2130	* Input thread for interfaces with opportunistic polling input model.
2131	*/
2132	static void
2133	dlil_rxpoll_input_thread_func(void *v, wait_result_t w)
2134	{
2135	#pragma unused(w)
2136	struct dlil_threading_info *inp = v;
2137	struct ifnet *ifp = inp->ifp;
2138	struct timespec ts;
2139
2140	VERIFY(inp != dlil_main_input_thread);
2141	VERIFY(ifp != NULL && (ifp->if_eflags & IFEF_RXPOLL));
2142
2143	while (`1`) {
2144	struct mbuf *m = NULL;
2145	u_int32_t m_cnt, m_size, poll_req = `0`;
2146	ifnet_model_t mode;
2147	struct timespec now, delta;
2148	u_int64_t ival;
2149
2150	lck_mtx_lock_spin(&inp->input_lck);
2151
2152	if ((ival = inp->rxpoll_ival) < IF_RXPOLL_INTERVALTIME_MIN)
2153	ival = IF_RXPOLL_INTERVALTIME_MIN;
2154
2155	/ Link parameters changed? /
2156	if (ifp->if_poll_update != `0`) {
2157	ifp->if_poll_update = `0`;
2158	(void) dlil_rxpoll_set_params(ifp, NULL, TRUE);
2159	}
2160
2161	/ Current operating mode /
2162	mode = inp->mode;
2163
2164	/ Wait until there is work to be done /
2165	while (!(inp->input_waiting & ~DLIL_INPUT_RUNNING)) {
2166	inp->input_waiting &= ~DLIL_INPUT_RUNNING;
2167	(void) msleep(&inp->input_waiting, &inp->input_lck,
2168	(PZERO - `1`) \| PSPIN, inp->input_name, NULL);
2169	}
2170
2171	inp->input_waiting \|= DLIL_INPUT_RUNNING;
2172	inp->input_waiting &= ~DLIL_INPUT_WAITING;
2173
2174	/*
2175	* Protocol registration and injection must always use
2176	* the main input thread; in theory the latter can utilize
2177	* the corresponding input thread where the packet arrived
2178	* on, but that requires our knowing the interface in advance
2179	* (and the benefits might not worth the trouble.)
2180	*/
2181	VERIFY(!(inp->input_waiting &
2182	(DLIL_PROTO_WAITING\|DLIL_PROTO_REGISTER)));
2183
2184	if (inp->input_waiting & DLIL_INPUT_TERMINATE) {
2185	/ Free up pending packets /
2186	lck_mtx_convert_spin(&inp->input_lck);
2187	_flushq(&inp->rcvq_pkts);
2188	if (inp->input_mit_tcall != NULL) {
2189	if (thread_call_isactive(inp->input_mit_tcall))
2190	thread_call_cancel(inp->input_mit_tcall);
2191	}
2192	lck_mtx_unlock(&inp->input_lck);
2193
2194	dlil_terminate_input_thread(inp);
2195	/ NOTREACHED /
2196	return;
2197	}
2198
2199	/ Total count of all packets /
2200	m_cnt = qlen(&inp->rcvq_pkts);
2201
2202	/ Total bytes of all packets /
2203	m_size = qsize(&inp->rcvq_pkts);
2204
2205	/ Packets for this interface /
2206	m = _getq_all(&inp->rcvq_pkts, NULL, NULL, NULL);
2207	VERIFY(m != NULL \|\| m_cnt == `0`);
2208
2209	nanouptime(&now);
2210	if (!net_timerisset(&inp->sample_lasttime))
2211	(&inp->sample_lasttime) = (&now);
2212
2213	net_timersub(&now, &inp->sample_lasttime, &delta);
2214	if (if_rxpoll && net_timerisset(&inp->sample_holdtime)) {
2215	u_int32_t ptot, btot;
2216
2217	/ Accumulate statistics for current sampling /
2218	PKTCNTR_ADD(&inp->sstats, m_cnt, m_size);
2219
2220	if (net_timercmp(&delta, &inp->sample_holdtime, <))
2221	goto skip;
2222
2223	(&inp->sample_lasttime) = (&now);
2224
2225	/ Calculate min/max of inbound bytes /
2226	btot = (u_int32_t)inp->sstats.bytes;
2227	if (inp->rxpoll_bmin == `0` \|\| inp->rxpoll_bmin > btot)
2228	inp->rxpoll_bmin = btot;
2229	if (btot > inp->rxpoll_bmax)
2230	inp->rxpoll_bmax = btot;
2231
2232	/ Calculate EWMA of inbound bytes /
2233	DLIL_EWMA(inp->rxpoll_bavg, btot, if_rxpoll_decay);
2234
2235	/ Calculate min/max of inbound packets /
2236	ptot = (u_int32_t)inp->sstats.packets;
2237	if (inp->rxpoll_pmin == `0` \|\| inp->rxpoll_pmin > ptot)
2238	inp->rxpoll_pmin = ptot;
2239	if (ptot > inp->rxpoll_pmax)
2240	inp->rxpoll_pmax = ptot;
2241
2242	/ Calculate EWMA of inbound packets /
2243	DLIL_EWMA(inp->rxpoll_pavg, ptot, if_rxpoll_decay);
2244
2245	/ Reset sampling statistics /
2246	PKTCNTR_CLEAR(&inp->sstats);
2247
2248	/ Calculate EWMA of wakeup requests /
2249	DLIL_EWMA(inp->rxpoll_wavg, inp->wtot, if_rxpoll_decay);
2250	inp->wtot = `0`;
2251
2252	if (dlil_verbose) {
2253	if (!net_timerisset(&inp->dbg_lasttime))
2254	(&inp->dbg_lasttime) = (&now);
2255	net_timersub(&now, &inp->dbg_lasttime, &delta);
2256	if (net_timercmp(&delta, &dlil_dbgrate, >=)) {
2257	(&inp->dbg_lasttime) = (&now);
2258	printf("%s: [%s] pkts avg %d max %d "
2259	"limits [%d/%d], wreq avg %d "
2260	"limits [%d/%d], bytes avg %d "
2261	"limits [%d/%d]\n", if_name(ifp),
2262	(inp->mode ==
2263	IFNET_MODEL_INPUT_POLL_ON) ?
2264	"ON" : "OFF", inp->rxpoll_pavg,
2265	inp->rxpoll_pmax,
2266	inp->rxpoll_plowat,
2267	inp->rxpoll_phiwat,
2268	inp->rxpoll_wavg,
2269	inp->rxpoll_wlowat,
2270	inp->rxpoll_whiwat,
2271	inp->rxpoll_bavg,
2272	inp->rxpoll_blowat,
2273	inp->rxpoll_bhiwat);
2274	}
2275	}
2276
2277	/ Perform mode transition, if necessary /
2278	if (!net_timerisset(&inp->mode_lasttime))
2279	(&inp->mode_lasttime) = (&now);
2280
2281	net_timersub(&now, &inp->mode_lasttime, &delta);
2282	if (net_timercmp(&delta, &inp->mode_holdtime, <))
2283	goto skip;
2284
2285	if (inp->rxpoll_pavg <= inp->rxpoll_plowat &&
2286	inp->rxpoll_bavg <= inp->rxpoll_blowat &&
2287	inp->mode != IFNET_MODEL_INPUT_POLL_OFF) {
2288	mode = IFNET_MODEL_INPUT_POLL_OFF;
2289	} else if (inp->rxpoll_pavg >= inp->rxpoll_phiwat &&
2290	(inp->rxpoll_bavg >= inp->rxpoll_bhiwat \|\|
2291	inp->rxpoll_wavg >= inp->rxpoll_whiwat) &&
2292	inp->mode != IFNET_MODEL_INPUT_POLL_ON) {
2293	mode = IFNET_MODEL_INPUT_POLL_ON;
2294	}
2295
2296	if (mode != inp->mode) {
2297	inp->mode = mode;
2298	(&inp->mode_lasttime) = (&now);
2299	poll_req++;
2300	}
2301	}
2302	skip:
2303	dlil_input_stats_sync(ifp, inp);
2304
2305	lck_mtx_unlock(&inp->input_lck);
2306
2307	/*
2308	* If there's a mode change and interface is still attached,
2309	* perform a downcall to the driver for the new mode. Also
2310	* hold an IO refcnt on the interface to prevent it from
2311	* being detached (will be release below.)
2312	*/
2313	if (poll_req != `0` && ifnet_is_attached(ifp, `1`)) {
2314	struct ifnet_model_params p = { mode, { `0` } };
2315	errno_t err;
2316
2317	if (dlil_verbose) {
2318	printf("%s: polling is now %s, "
2319	"pkts avg %d max %d limits [%d/%d], "
2320	"wreq avg %d limits [%d/%d], "
2321	"bytes avg %d limits [%d/%d]\n",
2322	if_name(ifp),
2323	(mode == IFNET_MODEL_INPUT_POLL_ON) ?
2324	"ON" : "OFF", inp->rxpoll_pavg,
2325	inp->rxpoll_pmax, inp->rxpoll_plowat,
2326	inp->rxpoll_phiwat, inp->rxpoll_wavg,
2327	inp->rxpoll_wlowat, inp->rxpoll_whiwat,
2328	inp->rxpoll_bavg, inp->rxpoll_blowat,
2329	inp->rxpoll_bhiwat);
2330	}
2331
2332	if ((err = ((*ifp->if_input_ctl)(ifp,
2333	IFNET_CTL_SET_INPUT_MODEL, sizeof (p), &p))) != `0`) {
2334	printf("%s: error setting polling mode "
2335	"to %s (%d)\n", if_name(ifp),
2336	(mode == IFNET_MODEL_INPUT_POLL_ON) ?
2337	"ON" : "OFF", err);
2338	}
2339
2340	switch (mode) {
2341	case IFNET_MODEL_INPUT_POLL_OFF:
2342	ifnet_set_poll_cycle(ifp, NULL);
2343	inp->rxpoll_offreq++;
2344	if (err != `0`)
2345	inp->rxpoll_offerr++;
2346	break;
2347
2348	case IFNET_MODEL_INPUT_POLL_ON:
2349	net_nsectimer(&ival, &ts);
2350	ifnet_set_poll_cycle(ifp, &ts);
2351	ifnet_poll(ifp);
2352	inp->rxpoll_onreq++;
2353	if (err != `0`)
2354	inp->rxpoll_onerr++;
2355	break;
2356
2357	default:
2358	VERIFY(`0`);
2359	/ NOTREACHED /
2360	}
2361
2362	/ Release the IO refcnt /
2363	ifnet_decr_iorefcnt(ifp);
2364	}
2365
2366	/*
2367	* NOTE warning %%% attention !!!!
2368	* We should think about putting some thread starvation
2369	* safeguards if we deal with long chains of packets.
2370	*/
2371	if (m != NULL)
2372	dlil_input_packet_list_extended(NULL, m, m_cnt, mode);
2373	}
2374
2375	/ NOTREACHED /
2376	VERIFY(`0`); / we should never get here /
2377	}
2378
2379	/*
2380	* Must be called on an attached ifnet (caller is expected to check.)
2381	* Caller may pass NULL for poll parameters to indicate "auto-tuning."
2382	*/
2383	errno_t
2384	dlil_rxpoll_set_params(struct ifnet ifp, struct* ifnet_poll_params *p,
2385	boolean_t locked)
2386	{
2387	struct dlil_threading_info *inp;
2388	u_int64_t sample_holdtime, inbw;
2389
2390	VERIFY(ifp != NULL);
2391	if (!(ifp->if_eflags & IFEF_RXPOLL) \|\| (inp = ifp->if_inp) == NULL)
2392	return (ENXIO);
2393
2394	if (p != NULL) {
2395	if ((p->packets_lowat == `0` && p->packets_hiwat != `0`) \|\|
2396	(p->packets_lowat != `0` && p->packets_hiwat == `0`))
2397	return (EINVAL);
2398	if (p->packets_lowat != `0` && / hiwat must be non-zero /
2399	p->packets_lowat >= p->packets_hiwat)
2400	return (EINVAL);
2401	if ((p->bytes_lowat == `0` && p->bytes_hiwat != `0`) \|\|
2402	(p->bytes_lowat != `0` && p->bytes_hiwat == `0`))
2403	return (EINVAL);
2404	if (p->bytes_lowat != `0` && / hiwat must be non-zero /
2405	p->bytes_lowat >= p->bytes_hiwat)
2406	return (EINVAL);
2407	if (p->interval_time != `0` &&
2408	p->interval_time < IF_RXPOLL_INTERVALTIME_MIN)
2409	p->interval_time = IF_RXPOLL_INTERVALTIME_MIN;
2410	}
2411
2412	if (!locked)
2413	lck_mtx_lock(&inp->input_lck);
2414
2415	LCK_MTX_ASSERT(&inp->input_lck, LCK_MTX_ASSERT_OWNED);
2416
2417	/*
2418	* Normally, we'd reset the parameters to the auto-tuned values
2419	* if the the input thread detects a change in link rate. If the
2420	* driver provides its own parameters right after a link rate
2421	* changes, but before the input thread gets to run, we want to
2422	* make sure to keep the driver's values. Clearing if_poll_update
2423	* will achieve that.
2424	*/
2425	if (p != NULL && !locked && ifp->if_poll_update != `0`)
2426	ifp->if_poll_update = `0`;
2427
2428	if ((inbw = ifnet_input_linkrate(ifp)) == `0` && p == NULL) {
2429	sample_holdtime = `0`; / polling is disabled /
2430	inp->rxpoll_wlowat = inp->rxpoll_plowat =
2431	inp->rxpoll_blowat = `0`;
2432	inp->rxpoll_whiwat = inp->rxpoll_phiwat =
2433	inp->rxpoll_bhiwat = (u_int32_t)-`1`;
2434	inp->rxpoll_plim = `0`;
2435	inp->rxpoll_ival = IF_RXPOLL_INTERVALTIME_MIN;
2436	} else {
2437	u_int32_t plowat, phiwat, blowat, bhiwat, plim;
2438	u_int64_t ival;
2439	unsigned int n, i;
2440
2441	for (n = `0`, i = `0`; rxpoll_tbl[i].speed != `0`; i++) {
2442	if (inbw < rxpoll_tbl[i].speed)
2443	break;
2444	n = i;
2445	}
2446	/ auto-tune if caller didn't specify a value /
2447	plowat = ((p == NULL \|\| p->packets_lowat == `0`) ?
2448	rxpoll_tbl[n].plowat : p->packets_lowat);
2449	phiwat = ((p == NULL \|\| p->packets_hiwat == `0`) ?
2450	rxpoll_tbl[n].phiwat : p->packets_hiwat);
2451	blowat = ((p == NULL \|\| p->bytes_lowat == `0`) ?
2452	rxpoll_tbl[n].blowat : p->bytes_lowat);
2453	bhiwat = ((p == NULL \|\| p->bytes_hiwat == `0`) ?
2454	rxpoll_tbl[n].bhiwat : p->bytes_hiwat);
2455	plim = ((p == NULL \|\| p->packets_limit == `0`) ?
2456	if_rxpoll_max : p->packets_limit);
2457	ival = ((p == NULL \|\| p->interval_time == `0`) ?
2458	if_rxpoll_interval_time : p->interval_time);
2459
2460	VERIFY(plowat != `0` && phiwat != `0`);
2461	VERIFY(blowat != `0` && bhiwat != `0`);
2462	VERIFY(ival >= IF_RXPOLL_INTERVALTIME_MIN);
2463
2464	sample_holdtime = if_rxpoll_sample_holdtime;
2465	inp->rxpoll_wlowat = if_rxpoll_wlowat;
2466	inp->rxpoll_whiwat = if_rxpoll_whiwat;
2467	inp->rxpoll_plowat = plowat;
2468	inp->rxpoll_phiwat = phiwat;
2469	inp->rxpoll_blowat = blowat;
2470	inp->rxpoll_bhiwat = bhiwat;
2471	inp->rxpoll_plim = plim;
2472	inp->rxpoll_ival = ival;
2473	}
2474
2475	net_nsectimer(&if_rxpoll_mode_holdtime, &inp->mode_holdtime);
2476	net_nsectimer(&sample_holdtime, &inp->sample_holdtime);
2477
2478	if (dlil_verbose) {
2479	printf("%s: speed %llu bps, sample per %llu nsec, "
2480	"poll interval %llu nsec, pkts per poll %u, "
2481	"pkt limits [%u/%u], wreq limits [%u/%u], "
2482	"bytes limits [%u/%u]\n", if_name(ifp),
2483	inbw, sample_holdtime, inp->rxpoll_ival, inp->rxpoll_plim,
2484	inp->rxpoll_plowat, inp->rxpoll_phiwat, inp->rxpoll_wlowat,
2485	inp->rxpoll_whiwat, inp->rxpoll_blowat, inp->rxpoll_bhiwat);
2486	}
2487
2488	if (!locked)
2489	lck_mtx_unlock(&inp->input_lck);
2490
2491	return (`0`);
2492	}
2493
2494	/*
2495	* Must be called on an attached ifnet (caller is expected to check.)
2496	*/
2497	errno_t
2498	dlil_rxpoll_get_params(struct ifnet ifp, struct* ifnet_poll_params *p)
2499	{
2500	struct dlil_threading_info *inp;
2501
2502	VERIFY(ifp != NULL && p != NULL);
2503	if (!(ifp->if_eflags & IFEF_RXPOLL) \|\| (inp = ifp->if_inp) == NULL)
2504	return (ENXIO);
2505
2506	bzero(p, sizeof (*p));
2507
2508	lck_mtx_lock(&inp->input_lck);
2509	p->packets_limit = inp->rxpoll_plim;
2510	p->packets_lowat = inp->rxpoll_plowat;
2511	p->packets_hiwat = inp->rxpoll_phiwat;
2512	p->bytes_lowat = inp->rxpoll_blowat;
2513	p->bytes_hiwat = inp->rxpoll_bhiwat;
2514	p->interval_time = inp->rxpoll_ival;
2515	lck_mtx_unlock(&inp->input_lck);
2516
2517	return (`0`);
2518	}
2519
2520	errno_t
2521	ifnet_input(struct ifnet ifp, struct* mbuf *m_head,
2522	const struct ifnet_stat_increment_param *s)
2523	{
2524	return (ifnet_input_common(ifp, m_head, NULL, s, FALSE, FALSE));
2525	}
2526
2527	errno_t
2528	ifnet_input_extended(struct ifnet ifp, struct* mbuf *m_head,
2529	struct mbuf m_tail, const* struct ifnet_stat_increment_param *s)
2530	{
2531	return (ifnet_input_common(ifp, m_head, m_tail, s, TRUE, FALSE));
2532	}
2533
2534	static errno_t
2535	ifnet_input_common(struct ifnet ifp, struct* mbuf m_head, struct* mbuf *m_tail,
2536	const struct ifnet_stat_increment_param *s, boolean_t ext, boolean_t poll)
2537	{
2538	dlil_input_func input_func;
2539	struct ifnet_stat_increment_param _s;
2540	u_int32_t m_cnt = `0`, m_size = `0`;
2541	struct mbuf *last;
2542	errno_t err = `0`;
2543
2544	if ((m_head == NULL && !poll) \|\| (s == NULL && ext)) {
2545	if (m_head != NULL)
2546	mbuf_freem_list(m_head);
2547	return (EINVAL);
2548	}
2549
2550	VERIFY(m_head != NULL \|\| (s == NULL && m_tail == NULL && !ext && poll));
2551	VERIFY(m_tail == NULL \|\| ext);
2552	VERIFY(s != NULL \|\| !ext);
2553
2554	/*
2555	* Drop the packet(s) if the parameters are invalid, or if the
2556	* interface is no longer attached; else hold an IO refcnt to
2557	* prevent it from being detached (will be released below.)
2558	*/
2559	if (ifp == NULL \|\| (ifp != lo_ifp && !ifnet_is_attached(ifp, `1`))) {
2560	if (m_head != NULL)
2561	mbuf_freem_list(m_head);
2562	return (EINVAL);
2563	}
2564
2565	input_func = ifp->if_input_dlil;
2566	VERIFY(input_func != NULL);
2567
2568	if (m_tail == NULL) {
2569	last = m_head;
2570	while (m_head != NULL) {
2571	#if IFNET_INPUT_SANITY_CHK
2572	if (dlil_input_sanity_check != `0`)
2573	DLIL_INPUT_CHECK(last, ifp);
2574	#endif /* IFNET_INPUT_SANITY_CHK */
2575	m_cnt++;
2576	m_size += m_length(last);
2577	if (mbuf_nextpkt(last) == NULL)
2578	break;
2579	last = mbuf_nextpkt(last);
2580	}
2581	m_tail = last;
2582	} else {
2583	#if IFNET_INPUT_SANITY_CHK
2584	if (dlil_input_sanity_check != `0`) {
2585	last = m_head;
2586	while (`1`) {
2587	DLIL_INPUT_CHECK(last, ifp);
2588	m_cnt++;
2589	m_size += m_length(last);
2590	if (mbuf_nextpkt(last) == NULL)
2591	break;
2592	last = mbuf_nextpkt(last);
2593	}
2594	} else {
2595	m_cnt = s->packets_in;
2596	m_size = s->bytes_in;
2597	last = m_tail;
2598	}
2599	#else
2600	m_cnt = s->packets_in;
2601	m_size = s->bytes_in;
2602	last = m_tail;
2603	#endif /* IFNET_INPUT_SANITY_CHK */
2604	}
2605
2606	if (last != m_tail) {
2607	panic_plain("%s: invalid input packet chain for %s, "
2608	"tail mbuf %p instead of %p\n", __func__, if_name(ifp),
2609	m_tail, last);
2610	}
2611
2612	/*
2613	* Assert packet count only for the extended variant, for backwards
2614	* compatibility, since this came directly from the device driver.
2615	* Relax this assertion for input bytes, as the driver may have
2616	* included the link-layer headers in the computation; hence
2617	* m_size is just an approximation.
2618	*/
2619	if (ext && s->packets_in != m_cnt) {
2620	panic_plain("%s: input packet count mismatch for %s, "
2621	"%d instead of %d\n", __func__, if_name(ifp),
2622	s->packets_in, m_cnt);
2623	}
2624
2625	if (s == NULL) {
2626	bzero(&_s, sizeof (_s));
2627	s = &_s;
2628	} else {
2629	_s = *s;
2630	}
2631	_s.packets_in = m_cnt;
2632	_s.bytes_in = m_size;
2633
2634	err = (*input_func)(ifp, m_head, m_tail, s, poll, current_thread());
2635
2636	if (ifp != lo_ifp) {
2637	/ Release the IO refcnt /
2638	ifnet_decr_iorefcnt(ifp);
2639	}
2640
2641	return (err);
2642	}
2643
2644
2645	errno_t
2646	dlil_output_handler(struct ifnet ifp, struct* mbuf *m)
2647	{
2648	return (ifp->if_output(ifp, m));
2649	}
2650
2651	errno_t
2652	dlil_input_handler(struct ifnet ifp, struct* mbuf *m_head,
2653	struct mbuf m_tail, const* struct ifnet_stat_increment_param *s,
2654	boolean_t poll, struct thread *tp)
2655	{
2656	struct dlil_threading_info *inp;
2657	u_int32_t m_cnt = s->packets_in;
2658	u_int32_t m_size = s->bytes_in;
2659
2660	if ((inp = ifp->if_inp) == NULL)
2661	inp = dlil_main_input_thread;
2662
2663	/*
2664	* If there is a matching DLIL input thread associated with an
2665	* affinity set, associate this thread with the same set. We
2666	* will only do this once.
2667	*/
2668	lck_mtx_lock_spin(&inp->input_lck);
2669	if (inp != dlil_main_input_thread && inp->net_affinity && tp != NULL &&
2670	((!poll && inp->wloop_thr == THREAD_NULL) \|\|
2671	(poll && inp->poll_thr == THREAD_NULL))) {
2672	u_int32_t tag = inp->tag;
2673
2674	if (poll) {
2675	VERIFY(inp->poll_thr == THREAD_NULL);
2676	inp->poll_thr = tp;
2677	} else {
2678	VERIFY(inp->wloop_thr == THREAD_NULL);
2679	inp->wloop_thr = tp;
2680	}
2681	lck_mtx_unlock(&inp->input_lck);
2682
2683	/ Associate the current thread with the new affinity tag /
2684	(void) dlil_affinity_set(tp, tag);
2685
2686	/*
2687	* Take a reference on the current thread; during detach,
2688	* we will need to refer to it in order to tear down its
2689	* affinity.
2690	*/
2691	thread_reference(tp);
2692	lck_mtx_lock_spin(&inp->input_lck);
2693	}
2694
2695	VERIFY(m_head != NULL \|\| (m_tail == NULL && m_cnt == `0`));
2696
2697	/*
2698	* Because of loopbacked multicast we cannot stuff the ifp in
2699	* the rcvif of the packet header: loopback (lo0) packets use a
2700	* dedicated list so that we can later associate them with lo_ifp
2701	* on their way up the stack. Packets for other interfaces without
2702	* dedicated input threads go to the regular list.
2703	*/
2704	if (m_head != NULL) {
2705	if (inp == dlil_main_input_thread && ifp == lo_ifp) {
2706	struct dlil_main_threading_info *inpm =
2707	(struct dlil_main_threading_info *)inp;
2708	_addq_multi(&inpm->lo_rcvq_pkts, m_head, m_tail,
2709	m_cnt, m_size);
2710	} else {
2711	_addq_multi(&inp->rcvq_pkts, m_head, m_tail,
2712	m_cnt, m_size);
2713	}
2714	}
2715
2716	#if IFNET_INPUT_SANITY_CHK
2717	if (dlil_input_sanity_check != `0`) {
2718	u_int32_t count;
2719	struct mbuf *m0;
2720
2721	for (m0 = m_head, count = `0`; m0; m0 = mbuf_nextpkt(m0))
2722	count++;
2723
2724	if (count != m_cnt) {
2725	panic_plain("%s: invalid packet count %d "
2726	"(expected %d)\n", if_name(ifp),
2727	count, m_cnt);
2728	/ NOTREACHED /
2729	}
2730
2731	inp->input_mbuf_cnt += m_cnt;
2732	}
2733	#endif /* IFNET_INPUT_SANITY_CHK */
2734
2735	dlil_input_stats_add(s, inp, poll);
2736	/*
2737	* If we're using the main input thread, synchronize the
2738	* stats now since we have the interface context. All
2739	* other cases involving dedicated input threads will
2740	* have their stats synchronized there.
2741	*/
2742	if (inp == dlil_main_input_thread)
2743	dlil_input_stats_sync(ifp, inp);
2744
2745	if (inp->input_mit_tcall &&
2746	qlen(&inp->rcvq_pkts) >= dlil_rcv_mit_pkts_min &&
2747	qlen(&inp->rcvq_pkts) < dlil_rcv_mit_pkts_max &&
2748	(ifp->if_family == IFNET_FAMILY_ETHERNET \|\|
2749	ifp->if_type == IFT_CELLULAR)
2750	) {
2751	if (!thread_call_isactive(inp->input_mit_tcall)) {
2752	uint64_t deadline;
2753	clock_interval_to_deadline(dlil_rcv_mit_interval,
2754	`1`, &deadline);
2755	(void) thread_call_enter_delayed(
2756	inp->input_mit_tcall, deadline);
2757	}
2758	} else {
2759	inp->input_waiting \|= DLIL_INPUT_WAITING;
2760	if (!(inp->input_waiting & DLIL_INPUT_RUNNING)) {
2761	inp->wtot++;
2762	wakeup_one((caddr_t)&inp->input_waiting);
2763	}
2764	}
2765	lck_mtx_unlock(&inp->input_lck);
2766
2767	return (`0`);
2768	}
2769
2770
2771	static void
2772	ifnet_start_common(struct ifnet *ifp, boolean_t resetfc)
2773	{
2774	if (!(ifp->if_eflags & IFEF_TXSTART))
2775	return;
2776	/*
2777	* If the starter thread is inactive, signal it to do work,
2778	* unless the interface is being flow controlled from below,
2779	* e.g. a virtual interface being flow controlled by a real
2780	* network interface beneath it, or it's been disabled via
2781	* a call to ifnet_disable_output().
2782	*/
2783	lck_mtx_lock_spin(&ifp->if_start_lock);
2784	if (resetfc) {
2785	ifp->if_start_flags &= ~IFSF_FLOW_CONTROLLED;
2786	} else if (ifp->if_start_flags & IFSF_FLOW_CONTROLLED) {
2787	lck_mtx_unlock(&ifp->if_start_lock);
2788	return;
2789	}
2790	ifp->if_start_req++;
2791	if (!ifp->if_start_active && ifp->if_start_thread != THREAD_NULL &&
2792	(resetfc \|\| !(ifp->if_eflags & IFEF_ENQUEUE_MULTI) \|\|
2793	IFCQ_LEN(&ifp->if_snd) >= ifp->if_start_delay_qlen \|\|
2794	ifp->if_start_delayed == `0`)) {
2795	(void) thread_wakeup_thread((caddr_t)&ifp->if_start_thread,
2796	ifp->if_start_thread);
2797	}
2798	lck_mtx_unlock(&ifp->if_start_lock);
2799	}
2800
2801	void
2802	ifnet_start(struct ifnet *ifp)
2803	{
2804	ifnet_start_common(ifp, FALSE);
2805	}
2806
2807	static void
2808	ifnet_start_thread_fn(void *v, wait_result_t w)
2809	{
2810	#pragma unused(w)
2811	struct ifnet *ifp = v;
2812	char ifname[IFNAMSIZ + `1`];
2813	char thread_name[MAXTHREADNAMESIZE];
2814	struct timespec *ts = NULL;
2815	struct ifclassq *ifq = &ifp->if_snd;
2816	struct timespec delay_start_ts;
2817
2818	/ Construct the name for this thread, and then apply it. /
2819	bzero(thread_name, sizeof(thread_name));
2820	(void) snprintf(thread_name, sizeof (thread_name),
2821	"ifnet_start_%s", ifp->if_xname);
2822	thread_set_thread_name(ifp->if_start_thread, thread_name);
2823
2824	/*
2825	* Treat the dedicated starter thread for lo0 as equivalent to
2826	* the driver workloop thread; if net_affinity is enabled for
2827	* the main input thread, associate this starter thread to it
2828	* by binding them with the same affinity tag. This is done
2829	* only once (as we only have one lo_ifp which never goes away.)
2830	*/
2831	if (ifp == lo_ifp) {
2832	struct dlil_threading_info *inp = dlil_main_input_thread;
2833	struct thread *tp = current_thread();
2834
2835	lck_mtx_lock(&inp->input_lck);
2836	if (inp->net_affinity) {
2837	u_int32_t tag = inp->tag;
2838
2839	VERIFY(inp->wloop_thr == THREAD_NULL);
2840	VERIFY(inp->poll_thr == THREAD_NULL);
2841	inp->wloop_thr = tp;
2842	lck_mtx_unlock(&inp->input_lck);
2843
2844	/ Associate this thread with the affinity tag /
2845	(void) dlil_affinity_set(tp, tag);
2846	} else {
2847	lck_mtx_unlock(&inp->input_lck);
2848	}
2849	}
2850
2851	(void) snprintf(ifname, sizeof (ifname), "%s_starter", if_name(ifp));
2852
2853	lck_mtx_lock_spin(&ifp->if_start_lock);
2854
2855	for (;;) {
2856	if (ifp->if_start_thread != NULL) {
2857	(void) msleep(&ifp->if_start_thread,
2858	&ifp->if_start_lock,
2859	(PZERO - `1`) \| PSPIN, ifname, ts);
2860	}
2861	/ interface is detached? /
2862	if (ifp->if_start_thread == THREAD_NULL) {
2863	ifnet_set_start_cycle(ifp, NULL);
2864	lck_mtx_unlock(&ifp->if_start_lock);
2865	ifnet_purge(ifp);
2866
2867	if (dlil_verbose) {
2868	printf("%s: starter thread terminated\n",
2869	if_name(ifp));
2870	}
2871
2872	/ for the extra refcnt from kernel_thread_start() /
2873	thread_deallocate(current_thread());
2874	/ this is the end /
2875	thread_terminate(current_thread());
2876	/ NOTREACHED /
2877	return;
2878	}
2879
2880	ifp->if_start_active = `1`;
2881
2882	for (;;) {
2883	u_int32_t req = ifp->if_start_req;
2884	if (!IFCQ_IS_EMPTY(ifq) &&
2885	(ifp->if_eflags & IFEF_ENQUEUE_MULTI) &&
2886	ifp->if_start_delayed == `0` &&
2887	IFCQ_LEN(ifq) < ifp->if_start_delay_qlen &&
2888	(ifp->if_eflags & IFEF_DELAY_START)) {
2889	ifp->if_start_delayed = `1`;
2890	ifnet_start_delayed++;
2891	break;
2892	} else {
2893	ifp->if_start_delayed = `0`;
2894	}
2895	lck_mtx_unlock(&ifp->if_start_lock);
2896
2897	/*
2898	* If no longer attached, don't call start because ifp
2899	* is being destroyed; else hold an IO refcnt to
2900	* prevent the interface from being detached (will be
2901	* released below.)
2902	*/
2903	if (!ifnet_is_attached(ifp, `1`)) {
2904	lck_mtx_lock_spin(&ifp->if_start_lock);
2905	break;
2906	}
2907
2908	/ invoke the driver's start routine /
2909	((*ifp->if_start)(ifp));
2910
2911	/*
2912	* Release the io ref count taken by ifnet_is_attached.
2913	*/
2914	ifnet_decr_iorefcnt(ifp);
2915
2916	lck_mtx_lock_spin(&ifp->if_start_lock);
2917
2918	/*
2919	* If there's no pending request or if the
2920	* interface has been disabled, we're done.
2921	*/
2922	if (req == ifp->if_start_req \|\|
2923	(ifp->if_start_flags & IFSF_FLOW_CONTROLLED)) {
2924	break;
2925	}
2926	}
2927
2928	ifp->if_start_req = `0`;
2929	ifp->if_start_active = `0`;
2930
2931	/*
2932	* Wakeup N ns from now if rate-controlled by TBR, and if
2933	* there are still packets in the send queue which haven't
2934	* been dequeued so far; else sleep indefinitely (ts = NULL)
2935	* until ifnet_start() is called again.
2936	*/
2937	ts = ((IFCQ_TBR_IS_ENABLED(ifq) && !IFCQ_IS_EMPTY(ifq)) ?
2938	&ifp->if_start_cycle : NULL);
2939
2940	if (ts == NULL && ifp->if_start_delayed == `1`) {
2941	delay_start_ts.tv_sec = `0`;
2942	delay_start_ts.tv_nsec = ifp->if_start_delay_timeout;
2943	ts = &delay_start_ts;
2944	}
2945
2946	if (ts != NULL && ts->tv_sec == `0` && ts->tv_nsec == `0`)
2947	ts = NULL;
2948	}
2949
2950	/ NOTREACHED /
2951	}
2952
2953	void
2954	ifnet_set_start_cycle(struct ifnet ifp, struct* timespec *ts)
2955	{
2956	if (ts == NULL)
2957	bzero(&ifp->if_start_cycle, sizeof (ifp->if_start_cycle));
2958	else
2959	(&ifp->if_start_cycle) = ts;
2960
2961	if (ts != NULL && ts->tv_nsec != `0` && dlil_verbose)
2962	printf("%s: restart interval set to %lu nsec\n",
2963	if_name(ifp), ts->tv_nsec);
2964	}
2965
2966	static void
2967	ifnet_poll(struct ifnet *ifp)
2968	{
2969	/*
2970	* If the poller thread is inactive, signal it to do work.
2971	*/
2972	lck_mtx_lock_spin(&ifp->if_poll_lock);
2973	ifp->if_poll_req++;
2974	if (!ifp->if_poll_active && ifp->if_poll_thread != THREAD_NULL) {
2975	wakeup_one((caddr_t)&ifp->if_poll_thread);
2976	}
2977	lck_mtx_unlock(&ifp->if_poll_lock);
2978	}
2979
2980	static void
2981	ifnet_poll_thread_fn(void *v, wait_result_t w)
2982	{
2983	#pragma unused(w)
2984	struct dlil_threading_info *inp;
2985	struct ifnet *ifp = v;
2986	char ifname[IFNAMSIZ + `1`];
2987	struct timespec *ts = NULL;
2988	struct ifnet_stat_increment_param s;
2989
2990	snprintf(ifname, sizeof (ifname), "%s_poller",
2991	if_name(ifp));
2992	bzero(&s, sizeof (s));
2993
2994	lck_mtx_lock_spin(&ifp->if_poll_lock);
2995
2996	inp = ifp->if_inp;
2997	VERIFY(inp != NULL);
2998
2999	for (;;) {
3000	if (ifp->if_poll_thread != THREAD_NULL) {
3001	(void) msleep(&ifp->if_poll_thread, &ifp->if_poll_lock,
3002	(PZERO - `1`) \| PSPIN, ifname, ts);
3003	}
3004
3005	/ interface is detached (maybe while asleep)? /
3006	if (ifp->if_poll_thread == THREAD_NULL) {
3007	ifnet_set_poll_cycle(ifp, NULL);
3008	lck_mtx_unlock(&ifp->if_poll_lock);
3009
3010	if (dlil_verbose) {
3011	printf("%s: poller thread terminated\n",
3012	if_name(ifp));
3013	}
3014
3015	/ for the extra refcnt from kernel_thread_start() /
3016	thread_deallocate(current_thread());
3017	/ this is the end /
3018	thread_terminate(current_thread());
3019	/ NOTREACHED /
3020	return;
3021	}
3022
3023	ifp->if_poll_active = `1`;
3024	for (;;) {
3025	struct mbuf m_head, m_tail;
3026	u_int32_t m_lim, m_cnt, m_totlen;
3027	u_int16_t req = ifp->if_poll_req;
3028
3029	lck_mtx_unlock(&ifp->if_poll_lock);
3030
3031	/*
3032	* If no longer attached, there's nothing to do;
3033	* else hold an IO refcnt to prevent the interface
3034	* from being detached (will be released below.)
3035	*/
3036	if (!ifnet_is_attached(ifp, `1`)) {
3037	lck_mtx_lock_spin(&ifp->if_poll_lock);
3038	break;
3039	}
3040
3041	m_lim = (inp->rxpoll_plim != `0`) ? inp->rxpoll_plim :
3042	MAX((qlimit(&inp->rcvq_pkts)),
3043	(inp->rxpoll_phiwat << `2`));
3044
3045	if (dlil_verbose > `1`) {
3046	printf("%s: polling up to %d pkts, "
3047	"pkts avg %d max %d, wreq avg %d, "
3048	"bytes avg %d\n",
3049	if_name(ifp), m_lim,
3050	inp->rxpoll_pavg, inp->rxpoll_pmax,
3051	inp->rxpoll_wavg, inp->rxpoll_bavg);
3052	}
3053
3054	/ invoke the driver's input poll routine /
3055	((*ifp->if_input_poll)(ifp, `0`, m_lim, &m_head, &m_tail,
3056	&m_cnt, &m_totlen));
3057
3058	if (m_head != NULL) {
3059	VERIFY(m_tail != NULL && m_cnt > `0`);
3060
3061	if (dlil_verbose > `1`) {
3062	printf("%s: polled %d pkts, "
3063	"pkts avg %d max %d, wreq avg %d, "
3064	"bytes avg %d\n",
3065	if_name(ifp), m_cnt,
3066	inp->rxpoll_pavg, inp->rxpoll_pmax,
3067	inp->rxpoll_wavg, inp->rxpoll_bavg);
3068	}
3069
3070	/ stats are required for extended variant /
3071	s.packets_in = m_cnt;
3072	s.bytes_in = m_totlen;
3073
3074	(void) ifnet_input_common(ifp, m_head, m_tail,
3075	&s, TRUE, TRUE);
3076	} else {
3077	if (dlil_verbose > `1`) {
3078	printf("%s: no packets, "
3079	"pkts avg %d max %d, wreq avg %d, "
3080	"bytes avg %d\n",
3081	if_name(ifp), inp->rxpoll_pavg,
3082	inp->rxpoll_pmax, inp->rxpoll_wavg,
3083	inp->rxpoll_bavg);
3084	}
3085
3086	(void) ifnet_input_common(ifp, NULL, NULL,
3087	NULL, FALSE, TRUE);
3088	}
3089
3090	/ Release the io ref count /
3091	ifnet_decr_iorefcnt(ifp);
3092
3093	lck_mtx_lock_spin(&ifp->if_poll_lock);
3094
3095	/ if there's no pending request, we're done /
3096	if (req == ifp->if_poll_req) {
3097	break;
3098	}
3099	}
3100	ifp->if_poll_req = `0`;
3101	ifp->if_poll_active = `0`;
3102
3103	/*
3104	* Wakeup N ns from now, else sleep indefinitely (ts = NULL)
3105	* until ifnet_poll() is called again.
3106	*/
3107	ts = &ifp->if_poll_cycle;
3108	if (ts->tv_sec == `0` && ts->tv_nsec == `0`)
3109	ts = NULL;
3110	}
3111
3112	/ NOTREACHED /
3113	}
3114
3115	void
3116	ifnet_set_poll_cycle(struct ifnet ifp, struct* timespec *ts)
3117	{
3118	if (ts == NULL)
3119	bzero(&ifp->if_poll_cycle, sizeof (ifp->if_poll_cycle));
3120	else
3121	(&ifp->if_poll_cycle) = ts;
3122
3123	if (ts != NULL && ts->tv_nsec != `0` && dlil_verbose)
3124	printf("%s: poll interval set to %lu nsec\n",
3125	if_name(ifp), ts->tv_nsec);
3126	}
3127
3128	void
3129	ifnet_purge(struct ifnet *ifp)
3130	{
3131	if (ifp != NULL && (ifp->if_eflags & IFEF_TXSTART))
3132	if_qflush(ifp, `0`);
3133	}
3134
3135	void
3136	ifnet_update_sndq(struct ifclassq *ifq, cqev_t ev)
3137	{
3138	IFCQ_LOCK_ASSERT_HELD(ifq);
3139
3140	if (!(IFCQ_IS_READY(ifq)))
3141	return;
3142
3143	if (IFCQ_TBR_IS_ENABLED(ifq)) {
3144	struct tb_profile tb = { ifq->ifcq_tbr.tbr_rate_raw,
3145	ifq->ifcq_tbr.tbr_percent, `0` };
3146	(void) ifclassq_tbr_set(ifq, &tb, FALSE);
3147	}
3148
3149	ifclassq_update(ifq, ev);
3150	}
3151
3152	void
3153	ifnet_update_rcv(struct ifnet *ifp, cqev_t ev)
3154	{
3155	switch (ev) {
3156	case CLASSQ_EV_LINK_BANDWIDTH:
3157	if (net_rxpoll && (ifp->if_eflags & IFEF_RXPOLL))
3158	ifp->if_poll_update++;
3159	break;
3160
3161	default:
3162	break;
3163	}
3164	}
3165
3166	errno_t
3167	ifnet_set_output_sched_model(struct ifnet *ifp, u_int32_t model)
3168	{
3169	struct ifclassq *ifq;
3170	u_int32_t omodel;
3171	errno_t err;
3172
3173	if (ifp == NULL \|\| model >= IFNET_SCHED_MODEL_MAX)
3174	return (EINVAL);
3175	else if (!(ifp->if_eflags & IFEF_TXSTART))
3176	return (ENXIO);
3177
3178	ifq = &ifp->if_snd;
3179	IFCQ_LOCK(ifq);
3180	omodel = ifp->if_output_sched_model;
3181	ifp->if_output_sched_model = model;
3182	if ((err = ifclassq_pktsched_setup(ifq)) != `0`)
3183	ifp->if_output_sched_model = omodel;
3184	IFCQ_UNLOCK(ifq);
3185
3186	return (err);
3187	}
3188
3189	errno_t
3190	ifnet_set_sndq_maxlen(struct ifnet *ifp, u_int32_t maxqlen)
3191	{
3192	if (ifp == NULL)
3193	return (EINVAL);
3194	else if (!(ifp->if_eflags & IFEF_TXSTART))
3195	return (ENXIO);
3196
3197	ifclassq_set_maxlen(&ifp->if_snd, maxqlen);
3198
3199	return (`0`);
3200	}
3201
3202	errno_t
3203	ifnet_get_sndq_maxlen(struct ifnet ifp, u_int32_t maxqlen)
3204	{
3205	if (ifp == NULL \|\| maxqlen == NULL)
3206	return (EINVAL);
3207	else if (!(ifp->if_eflags & IFEF_TXSTART))
3208	return (ENXIO);
3209
3210	*maxqlen = ifclassq_get_maxlen(&ifp->if_snd);
3211
3212	return (`0`);
3213	}
3214
3215	errno_t
3216	ifnet_get_sndq_len(struct ifnet ifp, u_int32_t pkts)
3217	{
3218	errno_t err;
3219
3220	if (ifp == NULL \|\| pkts == NULL)
3221	err = EINVAL;
3222	else if (!(ifp->if_eflags & IFEF_TXSTART))
3223	err = ENXIO;
3224	else
3225	err = ifclassq_get_len(&ifp->if_snd, MBUF_SC_UNSPEC,
3226	pkts, NULL);
3227
3228	return (err);
3229	}
3230
3231	errno_t
3232	ifnet_get_service_class_sndq_len(struct ifnet *ifp, mbuf_svc_class_t sc,
3233	u_int32_t pkts, u_int32_t bytes)
3234	{
3235	errno_t err;
3236
3237	if (ifp == NULL \|\| !MBUF_VALID_SC(sc) \|\|
3238	(pkts == NULL && bytes == NULL))
3239	err = EINVAL;
3240	else if (!(ifp->if_eflags & IFEF_TXSTART))
3241	err = ENXIO;
3242	else
3243	err = ifclassq_get_len(&ifp->if_snd, sc, pkts, bytes);
3244
3245	return (err);
3246	}
3247
3248	errno_t
3249	ifnet_set_rcvq_maxlen(struct ifnet *ifp, u_int32_t maxqlen)
3250	{
3251	struct dlil_threading_info *inp;
3252
3253	if (ifp == NULL)
3254	return (EINVAL);
3255	else if (!(ifp->if_eflags & IFEF_RXPOLL) \|\| ifp->if_inp == NULL)
3256	return (ENXIO);
3257
3258	if (maxqlen == `0`)
3259	maxqlen = if_rcvq_maxlen;
3260	else if (maxqlen < IF_RCVQ_MINLEN)
3261	maxqlen = IF_RCVQ_MINLEN;
3262
3263	inp = ifp->if_inp;
3264	lck_mtx_lock(&inp->input_lck);
3265	qlimit(&inp->rcvq_pkts) = maxqlen;
3266	lck_mtx_unlock(&inp->input_lck);
3267
3268	return (`0`);
3269	}
3270
3271	errno_t
3272	ifnet_get_rcvq_maxlen(struct ifnet ifp, u_int32_t maxqlen)
3273	{
3274	struct dlil_threading_info *inp;
3275
3276	if (ifp == NULL \|\| maxqlen == NULL)
3277	return (EINVAL);
3278	else if (!(ifp->if_eflags & IFEF_RXPOLL) \|\| ifp->if_inp == NULL)
3279	return (ENXIO);
3280
3281	inp = ifp->if_inp;
3282	lck_mtx_lock(&inp->input_lck);
3283	*maxqlen = qlimit(&inp->rcvq_pkts);
3284	lck_mtx_unlock(&inp->input_lck);
3285	return (`0`);
3286	}
3287
3288	void
3289	ifnet_enqueue_multi_setup(struct ifnet *ifp, uint16_t delay_qlen,
3290	uint16_t delay_timeout)
3291	{
3292	if (delay_qlen > `0` && delay_timeout > `0`) {
3293	ifp->if_eflags \|= IFEF_ENQUEUE_MULTI;
3294	ifp->if_start_delay_qlen = min(`100`, delay_qlen);
3295	ifp->if_start_delay_timeout = min(`20000`, delay_timeout);
3296	/ convert timeout to nanoseconds /
3297	ifp->if_start_delay_timeout *= `1000`;
3298	kprintf("%s: forced IFEF_ENQUEUE_MULTI qlen %u timeout %u\n",
3299	ifp->if_xname, (uint32_t)delay_qlen,
3300	(uint32_t)delay_timeout);
3301	} else {
3302	ifp->if_eflags &= ~IFEF_ENQUEUE_MULTI;
3303	}
3304	}
3305
3306	static inline errno_t
3307	ifnet_enqueue_common(struct ifnet ifp, void* *p, classq_pkt_type_t ptype,
3308	boolean_t flush, boolean_t *pdrop)
3309	{
3310	volatile uint64_t *fg_ts = NULL;
3311	volatile uint64_t *rt_ts = NULL;
3312	struct mbuf *m = p;
3313	struct timespec now;
3314	u_int64_t now_nsec = `0`;
3315	int error = `0`;
3316
3317	ASSERT(ifp->if_eflags & IFEF_TXSTART);
3318
3319	/*
3320	* If packet already carries a timestamp, either from dlil_output()
3321	* or from flowswitch, use it here. Otherwise, record timestamp.
3322	* PKTF_TS_VALID is always cleared prior to entering classq, i.e.
3323	* the timestamp value is used internally there.
3324	*/
3325	switch (ptype) {
3326	case QP_MBUF:
3327	ASSERT(m->m_flags & M_PKTHDR);
3328	ASSERT(m->m_nextpkt == NULL);
3329
3330	if (!(m->m_pkthdr.pkt_flags & PKTF_TS_VALID) \|\|
3331	m->m_pkthdr.pkt_timestamp == `0`) {
3332	nanouptime(&now);
3333	net_timernsec(&now, &now_nsec);
3334	m->m_pkthdr.pkt_timestamp = now_nsec;
3335	}
3336	m->m_pkthdr.pkt_flags &= ~PKTF_TS_VALID;
3337	/*
3338	* If the packet service class is not background,
3339	* update the timestamp to indicate recent activity
3340	* on a foreground socket.
3341	*/
3342	if ((m->m_pkthdr.pkt_flags & PKTF_FLOW_ID) &&
3343	m->m_pkthdr.pkt_flowsrc == FLOWSRC_INPCB) {
3344	if (!(m->m_pkthdr.pkt_flags & PKTF_SO_BACKGROUND)) {
3345	ifp->if_fg_sendts = _net_uptime;
3346	if (fg_ts != NULL)
3347	*fg_ts = _net_uptime;
3348	}
3349	if (m->m_pkthdr.pkt_flags & PKTF_SO_REALTIME) {
3350	ifp->if_rt_sendts = _net_uptime;
3351	if (rt_ts != NULL)
3352	*rt_ts = _net_uptime;
3353	}
3354	}
3355	break;
3356
3357
3358	default:
3359	VERIFY(`0`);
3360	/ NOTREACHED /
3361	}
3362
3363	if (ifp->if_eflags & IFEF_ENQUEUE_MULTI) {
3364	if (now_nsec == `0`) {
3365	nanouptime(&now);
3366	net_timernsec(&now, &now_nsec);
3367	}
3368	/*
3369	* If the driver chose to delay start callback for
3370	* coalescing multiple packets, Then use the following
3371	* heuristics to make sure that start callback will
3372	* be delayed only when bulk data transfer is detected.
3373	* 1. number of packets enqueued in (delay_win * 2) is
3374	* greater than or equal to the delay qlen.
3375	* 2. If delay_start is enabled it will stay enabled for
3376	* another 10 idle windows. This is to take into account
3377	* variable RTT and burst traffic.
3378	* 3. If the time elapsed since last enqueue is more
3379	* than 200ms we disable delaying start callback. This is
3380	* is to take idle time into account.
3381	*/
3382	u_int64_t dwin = (ifp->if_start_delay_timeout << `1`);
3383	if (ifp->if_start_delay_swin > `0`) {
3384	if ((ifp->if_start_delay_swin + dwin) > now_nsec) {
3385	ifp->if_start_delay_cnt++;
3386	} else if ((now_nsec - ifp->if_start_delay_swin)
3387	>= (`200` * `1000` * `1000`)) {
3388	ifp->if_start_delay_swin = now_nsec;
3389	ifp->if_start_delay_cnt = `1`;
3390	ifp->if_start_delay_idle = `0`;
3391	if (ifp->if_eflags & IFEF_DELAY_START) {
3392	ifp->if_eflags &=
3393	~(IFEF_DELAY_START);
3394	ifnet_delay_start_disabled++;
3395	}
3396	} else {
3397	if (ifp->if_start_delay_cnt >=
3398	ifp->if_start_delay_qlen) {
3399	ifp->if_eflags \|= IFEF_DELAY_START;
3400	ifp->if_start_delay_idle = `0`;
3401	} else {
3402	if (ifp->if_start_delay_idle >= `10`) {
3403	ifp->if_eflags &= ~(IFEF_DELAY_START);
3404	ifnet_delay_start_disabled++;
3405	} else {
3406	ifp->if_start_delay_idle++;
3407	}
3408	}
3409	ifp->if_start_delay_swin = now_nsec;
3410	ifp->if_start_delay_cnt = `1`;
3411	}
3412	} else {
3413	ifp->if_start_delay_swin = now_nsec;
3414	ifp->if_start_delay_cnt = `1`;
3415	ifp->if_start_delay_idle = `0`;
3416	ifp->if_eflags &= ~(IFEF_DELAY_START);
3417	}
3418	} else {
3419	ifp->if_eflags &= ~(IFEF_DELAY_START);
3420	}
3421
3422	switch (ptype) {
3423	case QP_MBUF:
3424	/ enqueue the packet (caller consumes object) /
3425	error = ifclassq_enqueue(&ifp->if_snd, m, QP_MBUF, pdrop);
3426	m = NULL;
3427	break;
3428
3429
3430	default:
3431	break;
3432	}
3433
3434	/*
3435	* Tell the driver to start dequeueing; do this even when the queue
3436	* for the packet is suspended (EQSUSPENDED), as the driver could still
3437	* be dequeueing from other unsuspended queues.
3438	*/
3439	if (!(ifp->if_eflags & IFEF_ENQUEUE_MULTI) &&
3440	((error == `0` && flush) \|\| error == EQFULL \|\| error == EQSUSPENDED))
3441	ifnet_start(ifp);
3442
3443	return (error);
3444	}
3445
3446	errno_t
3447	ifnet_enqueue(struct ifnet ifp, struct* mbuf *m)
3448	{
3449	boolean_t pdrop;
3450	return (ifnet_enqueue_mbuf(ifp, m, TRUE, &pdrop));
3451	}
3452
3453	errno_t
3454	ifnet_enqueue_mbuf(struct ifnet ifp, struct* mbuf *m, boolean_t flush,
3455	boolean_t *pdrop)
3456	{
3457	if (ifp == NULL \|\| m == NULL \|\| !(m->m_flags & M_PKTHDR) \|\|
3458	m->m_nextpkt != NULL) {
3459	if (m != NULL) {
3460	m_freem_list(m);
3461	*pdrop = TRUE;
3462	}
3463	return (EINVAL);
3464	} else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3465	!IF_FULLY_ATTACHED(ifp)) {
3466	/ flag tested without lock for performance /
3467	m_freem(m);
3468	*pdrop = TRUE;
3469	return (ENXIO);
3470	} else if (!(ifp->if_flags & IFF_UP)) {
3471	m_freem(m);
3472	*pdrop = TRUE;
3473	return (ENETDOWN);
3474	}
3475
3476	return (ifnet_enqueue_common(ifp, m, QP_MBUF, flush, pdrop));
3477	}
3478
3479
3480	errno_t
3481	ifnet_dequeue(struct ifnet ifp, struct* mbuf **mp)
3482	{
3483	errno_t rc;
3484	classq_pkt_type_t ptype;
3485	if (ifp == NULL \|\| mp == NULL)
3486	return (EINVAL);
3487	else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3488	ifp->if_output_sched_model >= IFNET_SCHED_MODEL_MAX)
3489	return (ENXIO);
3490	if (!ifnet_is_attached(ifp, `1`))
3491	return (ENXIO);
3492
3493	rc = ifclassq_dequeue(&ifp->if_snd, `1`, CLASSQ_DEQUEUE_MAX_BYTE_LIMIT,
3494	(void **)mp, NULL, NULL, NULL, &ptype);
3495	VERIFY((*mp == NULL) \|\| (ptype == QP_MBUF));
3496	ifnet_decr_iorefcnt(ifp);
3497
3498	return (rc);
3499	}
3500
3501	errno_t
3502	ifnet_dequeue_service_class(struct ifnet *ifp, mbuf_svc_class_t sc,
3503	struct mbuf **mp)
3504	{
3505	errno_t rc;
3506	classq_pkt_type_t ptype;
3507	if (ifp == NULL \|\| mp == NULL \|\| !MBUF_VALID_SC(sc))
3508	return (EINVAL);
3509	else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3510	ifp->if_output_sched_model >= IFNET_SCHED_MODEL_MAX)
3511	return (ENXIO);
3512	if (!ifnet_is_attached(ifp, `1`))
3513	return (ENXIO);
3514
3515	rc = ifclassq_dequeue_sc(&ifp->if_snd, sc, `1`,
3516	CLASSQ_DEQUEUE_MAX_BYTE_LIMIT, (void **)mp, NULL, NULL,
3517	NULL, &ptype);
3518	VERIFY((*mp == NULL) \|\| (ptype == QP_MBUF));
3519	ifnet_decr_iorefcnt(ifp);
3520	return (rc);
3521	}
3522
3523	errno_t
3524	ifnet_dequeue_multi(struct ifnet *ifp, u_int32_t pkt_limit,
3525	struct mbuf head, struct mbuf tail, u_int32_t cnt, u_int32_t len)
3526	{
3527	errno_t rc;
3528	classq_pkt_type_t ptype;
3529	if (ifp == NULL \|\| head == NULL \|\| pkt_limit < `1`)
3530	return (EINVAL);
3531	else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3532	ifp->if_output_sched_model >= IFNET_SCHED_MODEL_MAX)
3533	return (ENXIO);
3534	if (!ifnet_is_attached(ifp, `1`))
3535	return (ENXIO);
3536
3537	rc = ifclassq_dequeue(&ifp->if_snd, pkt_limit,
3538	CLASSQ_DEQUEUE_MAX_BYTE_LIMIT, (void *)head, (void* **)tail, cnt,
3539	len, &ptype);
3540	VERIFY((*head == NULL) \|\| (ptype == QP_MBUF));
3541	ifnet_decr_iorefcnt(ifp);
3542	return (rc);
3543	}
3544
3545	errno_t
3546	ifnet_dequeue_multi_bytes(struct ifnet *ifp, u_int32_t byte_limit,
3547	struct mbuf head, struct mbuf tail, u_int32_t cnt, u_int32_t len)
3548	{
3549	errno_t rc;
3550	classq_pkt_type_t ptype;
3551	if (ifp == NULL \|\| head == NULL \|\| byte_limit < `1`)
3552	return (EINVAL);
3553	else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3554	ifp->if_output_sched_model >= IFNET_SCHED_MODEL_MAX)
3555	return (ENXIO);
3556	if (!ifnet_is_attached(ifp, `1`))
3557	return (ENXIO);
3558
3559	rc = ifclassq_dequeue(&ifp->if_snd, CLASSQ_DEQUEUE_MAX_PKT_LIMIT,
3560	byte_limit, (void *)head, (void* **)tail, cnt, len, &ptype);
3561	VERIFY((*head == NULL) \|\| (ptype == QP_MBUF));
3562	ifnet_decr_iorefcnt(ifp);
3563	return (rc);
3564	}
3565
3566	errno_t
3567	ifnet_dequeue_service_class_multi(struct ifnet *ifp, mbuf_svc_class_t sc,
3568	u_int32_t pkt_limit, struct mbuf head, struct mbuf tail, u_int32_t *cnt,
3569	u_int32_t *len)
3570	{
3571	errno_t rc;
3572	classq_pkt_type_t ptype;
3573	if (ifp == NULL \|\| head == NULL \|\| pkt_limit < `1` \|\|
3574	!MBUF_VALID_SC(sc))
3575	return (EINVAL);
3576	else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
3577	ifp->if_output_sched_model >= IFNET_SCHED_MODEL_MAX)
3578	return (ENXIO);
3579	if (!ifnet_is_attached(ifp, `1`))
3580	return (ENXIO);
3581
3582	rc = ifclassq_dequeue_sc(&ifp->if_snd, sc, pkt_limit,
3583	CLASSQ_DEQUEUE_MAX_BYTE_LIMIT, (void **)head,
3584	(void **)tail, cnt, len, &ptype);
3585	VERIFY((*head == NULL) \|\| (ptype == QP_MBUF));
3586	ifnet_decr_iorefcnt(ifp);
3587	return (rc);
3588	}
3589
3590	#if !CONFIG_EMBEDDED
3591	errno_t
3592	ifnet_framer_stub(struct ifnet ifp, struct* mbuf **m,
3593	const struct sockaddr dest, const* char *dest_linkaddr,
3594	const char frame_type, u_int32_t pre, u_int32_t *post)
3595	{
3596	if (pre != NULL)
3597	*pre = `0`;
3598	if (post != NULL)
3599	*post = `0`;
3600
3601	return (ifp->if_framer_legacy(ifp, m, dest, dest_linkaddr, frame_type));
3602	}
3603	#endif /* !CONFIG_EMBEDDED */
3604
3605	static int
3606	dlil_interface_filters_input(struct ifnet ifp, struct* mbuf **m_p,
3607	char **frame_header_p, protocol_family_t protocol_family)
3608	{
3609	struct ifnet_filter *filter;
3610
3611	/*
3612	* Pass the inbound packet to the interface filters
3613	*/
3614	lck_mtx_lock_spin(&ifp->if_flt_lock);
3615	/ prevent filter list from changing in case we drop the lock /
3616	if_flt_monitor_busy(ifp);
3617	TAILQ_FOREACH(filter, &ifp->if_flt_head, filt_next) {
3618	int result;
3619
3620	if (!filter->filt_skip && filter->filt_input != NULL &&
3621	(filter->filt_protocol == `0` \|\|
3622	filter->filt_protocol == protocol_family)) {
3623	lck_mtx_unlock(&ifp->if_flt_lock);
3624
3625	result = (*filter->filt_input)(filter->filt_cookie,
3626	ifp, protocol_family, m_p, frame_header_p);
3627
3628	lck_mtx_lock_spin(&ifp->if_flt_lock);
3629	if (result != `0`) {
3630	/ we're done with the filter list /
3631	if_flt_monitor_unbusy(ifp);
3632	lck_mtx_unlock(&ifp->if_flt_lock);
3633	return (result);
3634	}
3635	}
3636	}
3637	/ we're done with the filter list /
3638	if_flt_monitor_unbusy(ifp);
3639	lck_mtx_unlock(&ifp->if_flt_lock);
3640
3641	/*
3642	* Strip away M_PROTO1 bit prior to sending packet up the stack as
3643	* it is meant to be local to a subsystem -- if_bridge for M_PROTO1
3644	*/
3645	if (*m_p != NULL)
3646	(*m_p)->m_flags &= ~M_PROTO1;
3647
3648	return (`0`);
3649	}
3650
3651	static int
3652	dlil_interface_filters_output(struct ifnet ifp, struct* mbuf **m_p,
3653	protocol_family_t protocol_family)
3654	{
3655	struct ifnet_filter *filter;
3656
3657	/*
3658	* Pass the outbound packet to the interface filters
3659	*/
3660	lck_mtx_lock_spin(&ifp->if_flt_lock);
3661	/ prevent filter list from changing in case we drop the lock /
3662	if_flt_monitor_busy(ifp);
3663	TAILQ_FOREACH(filter, &ifp->if_flt_head, filt_next) {
3664	int result;
3665
3666	if (!filter->filt_skip && filter->filt_output != NULL &&
3667	(filter->filt_protocol == `0` \|\|
3668	filter->filt_protocol == protocol_family)) {
3669	lck_mtx_unlock(&ifp->if_flt_lock);
3670
3671	result = filter->filt_output(filter->filt_cookie, ifp,
3672	protocol_family, m_p);
3673
3674	lck_mtx_lock_spin(&ifp->if_flt_lock);
3675	if (result != `0`) {
3676	/ we're done with the filter list /
3677	if_flt_monitor_unbusy(ifp);
3678	lck_mtx_unlock(&ifp->if_flt_lock);
3679	return (result);
3680	}
3681	}
3682	}
3683	/ we're done with the filter list /
3684	if_flt_monitor_unbusy(ifp);
3685	lck_mtx_unlock(&ifp->if_flt_lock);
3686
3687	return (`0`);
3688	}
3689
3690	static void
3691	dlil_ifproto_input(struct if_proto * ifproto, mbuf_t m)
3692	{
3693	int error;
3694
3695	if (ifproto->proto_kpi == kProtoKPI_v1) {
3696	/ Version 1 protocols get one packet at a time /
3697	while (m != NULL) {
3698	char * frame_header;
3699	mbuf_t next_packet;
3700
3701	next_packet = m->m_nextpkt;
3702	m->m_nextpkt = NULL;
3703	frame_header = m->m_pkthdr.pkt_hdr;
3704	m->m_pkthdr.pkt_hdr = NULL;
3705	error = (*ifproto->kpi.v1.input)(ifproto->ifp,
3706	ifproto->protocol_family, m, frame_header);
3707	if (error != `0` && error != EJUSTRETURN)
3708	m_freem(m);
3709	m = next_packet;
3710	}
3711	} else if (ifproto->proto_kpi == kProtoKPI_v2) {
3712	/ Version 2 protocols support packet lists /
3713	error = (*ifproto->kpi.v2.input)(ifproto->ifp,
3714	ifproto->protocol_family, m);
3715	if (error != `0` && error != EJUSTRETURN)
3716	m_freem_list(m);
3717	}
3718	}
3719
3720	static void
3721	dlil_input_stats_add(const struct ifnet_stat_increment_param *s,
3722	struct dlil_threading_info *inp, boolean_t poll)
3723	{
3724	struct ifnet_stat_increment_param *d = &inp->stats;
3725
3726	if (s->packets_in != `0`)
3727	d->packets_in += s->packets_in;
3728	if (s->bytes_in != `0`)
3729	d->bytes_in += s->bytes_in;
3730	if (s->errors_in != `0`)
3731	d->errors_in += s->errors_in;
3732
3733	if (s->packets_out != `0`)
3734	d->packets_out += s->packets_out;
3735	if (s->bytes_out != `0`)
3736	d->bytes_out += s->bytes_out;
3737	if (s->errors_out != `0`)
3738	d->errors_out += s->errors_out;
3739
3740	if (s->collisions != `0`)
3741	d->collisions += s->collisions;
3742	if (s->dropped != `0`)
3743	d->dropped += s->dropped;
3744
3745	if (poll)
3746	PKTCNTR_ADD(&inp->tstats, s->packets_in, s->bytes_in);
3747	}
3748
3749	static void
3750	dlil_input_stats_sync(struct ifnet ifp, struct* dlil_threading_info *inp)
3751	{
3752	struct ifnet_stat_increment_param *s = &inp->stats;
3753
3754	/*
3755	* Use of atomic operations is unavoidable here because
3756	* these stats may also be incremented elsewhere via KPIs.
3757	*/
3758	if (s->packets_in != `0`) {
3759	atomic_add_64(&ifp->if_data.ifi_ipackets, s->packets_in);
3760	s->packets_in = `0`;
3761	}
3762	if (s->bytes_in != `0`) {
3763	atomic_add_64(&ifp->if_data.ifi_ibytes, s->bytes_in);
3764	s->bytes_in = `0`;
3765	}
3766	if (s->errors_in != `0`) {
3767	atomic_add_64(&ifp->if_data.ifi_ierrors, s->errors_in);
3768	s->errors_in = `0`;
3769	}
3770
3771	if (s->packets_out != `0`) {
3772	atomic_add_64(&ifp->if_data.ifi_opackets, s->packets_out);
3773	s->packets_out = `0`;
3774	}
3775	if (s->bytes_out != `0`) {
3776	atomic_add_64(&ifp->if_data.ifi_obytes, s->bytes_out);
3777	s->bytes_out = `0`;
3778	}
3779	if (s->errors_out != `0`) {
3780	atomic_add_64(&ifp->if_data.ifi_oerrors, s->errors_out);
3781	s->errors_out = `0`;
3782	}
3783
3784	if (s->collisions != `0`) {
3785	atomic_add_64(&ifp->if_data.ifi_collisions, s->collisions);
3786	s->collisions = `0`;
3787	}
3788	if (s->dropped != `0`) {
3789	atomic_add_64(&ifp->if_data.ifi_iqdrops, s->dropped);
3790	s->dropped = `0`;
3791	}
3792
3793	if (ifp->if_data_threshold != `0`) {
3794	lck_mtx_convert_spin(&inp->input_lck);
3795	ifnet_notify_data_threshold(ifp);
3796	}
3797
3798	/*
3799	* No need for atomic operations as they are modified here
3800	* only from within the DLIL input thread context.
3801	*/
3802	if (inp->tstats.packets != `0`) {
3803	inp->pstats.ifi_poll_packets += inp->tstats.packets;
3804	inp->tstats.packets = `0`;
3805	}
3806	if (inp->tstats.bytes != `0`) {
3807	inp->pstats.ifi_poll_bytes += inp->tstats.bytes;
3808	inp->tstats.bytes = `0`;
3809	}
3810	}
3811
3812	__private_extern__ void
3813	dlil_input_packet_list(struct ifnet ifp, struct* mbuf *m)
3814	{
3815	return (dlil_input_packet_list_common(ifp, m, `0`,
3816	IFNET_MODEL_INPUT_POLL_OFF, FALSE));
3817	}
3818
3819	__private_extern__ void
3820	dlil_input_packet_list_extended(struct ifnet ifp, struct* mbuf *m,
3821	u_int32_t cnt, ifnet_model_t mode)
3822	{
3823	return (dlil_input_packet_list_common(ifp, m, cnt, mode, TRUE));
3824	}
3825
3826	static void
3827	dlil_input_packet_list_common(struct ifnet ifp_param, struct* mbuf *m,
3828	u_int32_t cnt, ifnet_model_t mode, boolean_t ext)
3829	{
3830	int error = `0`;
3831	protocol_family_t protocol_family;
3832	mbuf_t next_packet;
3833	ifnet_t ifp = ifp_param;
3834	char *frame_header = NULL;
3835	struct if_proto *last_ifproto = NULL;
3836	mbuf_t pkt_first = NULL;
3837	mbuf_t *pkt_next = NULL;
3838	u_int32_t poll_thresh = `0`, poll_ival = `0`;
3839
3840	KERNEL_DEBUG(DBG_FNC_DLIL_INPUT \| DBG_FUNC_START, `0`, `0`, `0`, `0`, `0`);
3841
3842	if (ext && mode == IFNET_MODEL_INPUT_POLL_ON && cnt > `1` &&
3843	(poll_ival = if_rxpoll_interval_pkts) > `0`)
3844	poll_thresh = cnt;
3845
3846	while (m != NULL) {
3847	struct if_proto *ifproto = NULL;
3848	int iorefcnt = `0`;
3849	uint32_t pktf_mask; / pkt flags to preserve /
3850
3851	if (ifp_param == NULL)
3852	ifp = m->m_pkthdr.rcvif;
3853
3854	if ((ifp->if_eflags & IFEF_RXPOLL) && poll_thresh != `0` &&
3855	poll_ival > `0` && (--poll_thresh % poll_ival) == `0`)
3856	ifnet_poll(ifp);
3857
3858	/ Check if this mbuf looks valid /
3859	MBUF_INPUT_CHECK(m, ifp);
3860
3861	next_packet = m->m_nextpkt;
3862	m->m_nextpkt = NULL;
3863	frame_header = m->m_pkthdr.pkt_hdr;
3864	m->m_pkthdr.pkt_hdr = NULL;
3865
3866	/*
3867	* Get an IO reference count if the interface is not
3868	* loopback (lo0) and it is attached; lo0 never goes
3869	* away, so optimize for that.
3870	*/
3871	if (ifp != lo_ifp) {
3872	if (!ifnet_is_attached(ifp, `1`)) {
3873	m_freem(m);
3874	goto next;
3875	}
3876	iorefcnt = `1`;
3877	/*
3878	* Preserve the time stamp if it was set.
3879	*/
3880	pktf_mask = PKTF_TS_VALID;
3881	} else {
3882	/*
3883	* If this arrived on lo0, preserve interface addr
3884	* info to allow for connectivity between loopback
3885	* and local interface addresses.
3886	*/
3887	pktf_mask = (PKTF_LOOP\|PKTF_IFAINFO);
3888	}
3889
3890	/ make sure packet comes in clean /
3891	m_classifier_init(m, pktf_mask);
3892
3893	ifp_inc_traffic_class_in(ifp, m);
3894
3895	/ find which protocol family this packet is for /
3896	ifnet_lock_shared(ifp);
3897	error = (*ifp->if_demux)(ifp, m, frame_header,
3898	&protocol_family);
3899	ifnet_lock_done(ifp);
3900	if (error != `0`) {
3901	if (error == EJUSTRETURN)
3902	goto next;
3903	protocol_family = `0`;
3904	}
3905
3906	pktap_input(ifp, protocol_family, m, frame_header);
3907
3908	/ Drop v4 packets received on CLAT46 enabled interface /
3909	if (protocol_family == PF_INET && IS_INTF_CLAT46(ifp)) {
3910	m_freem(m);
3911	ip6stat.ip6s_clat464_in_v4_drop++;
3912	goto next;
3913	}
3914
3915	/ Translate the packet if it is received on CLAT interface /
3916	if (protocol_family == PF_INET6 && IS_INTF_CLAT46(ifp)
3917	&& dlil_is_clat_needed(protocol_family, m)) {
3918	char *data = NULL;
3919	struct ether_header eh;
3920	struct ether_header *ehp = NULL;
3921
3922	if (ifp->if_type == IFT_ETHER) {
3923	ehp = (struct ether_header )(void* *)frame_header;
3924	/ Skip RX Ethernet packets if they are not IPV6 /
3925	if (ntohs(ehp->ether_type) != ETHERTYPE_IPV6)
3926	goto skip_clat;
3927
3928	/ Keep a copy of frame_header for Ethernet packets /
3929	bcopy(frame_header, (caddr_t)&eh, ETHER_HDR_LEN);
3930	}
3931	error = dlil_clat64(ifp, &protocol_family, &m);
3932	data = (char *) mbuf_data(m);
3933	if (error != `0`) {
3934	m_freem(m);
3935	ip6stat.ip6s_clat464_in_drop++;
3936	goto next;
3937	}
3938	/ Native v6 should be No-op /
3939	if (protocol_family != PF_INET)
3940	goto skip_clat;
3941
3942	/ Do this only for translated v4 packets. /
3943	switch (ifp->if_type) {
3944	case IFT_CELLULAR:
3945	frame_header = data;
3946	break;
3947	case IFT_ETHER:
3948	/*
3949	* Drop if the mbuf doesn't have enough
3950	* space for Ethernet header
3951	*/
3952	if (M_LEADINGSPACE(m) < ETHER_HDR_LEN) {
3953	m_free(m);
3954	ip6stat.ip6s_clat464_in_drop++;
3955	goto next;
3956	}
3957	/*
3958	* Set the frame_header ETHER_HDR_LEN bytes
3959	* preceeding the data pointer. Change
3960	* the ether_type too.
3961	*/
3962	frame_header = data - ETHER_HDR_LEN;
3963	eh.ether_type = htons(ETHERTYPE_IP);
3964	bcopy((caddr_t)&eh, frame_header, ETHER_HDR_LEN);
3965	break;
3966	}
3967	}
3968	skip_clat:
3969	if (hwcksum_dbg != `0` && !(ifp->if_flags & IFF_LOOPBACK) &&
3970	!(m->m_pkthdr.pkt_flags & PKTF_LOOP))
3971	dlil_input_cksum_dbg(ifp, m, frame_header,
3972	protocol_family);
3973
3974	/*
3975	* For partial checksum offload, we expect the driver to
3976	* set the start offset indicating the start of the span
3977	* that is covered by the hardware-computed checksum;
3978	* adjust this start offset accordingly because the data
3979	* pointer has been advanced beyond the link-layer header.
3980	*
3981	* Don't adjust if the interface is a bridge member, as
3982	* the adjustment will occur from the context of the
3983	* bridge interface during input.
3984	*/
3985	if (ifp->if_bridge == NULL && (m->m_pkthdr.csum_flags &
3986	(CSUM_DATA_VALID \| CSUM_PARTIAL)) ==
3987	(CSUM_DATA_VALID \| CSUM_PARTIAL)) {
3988	int adj;
3989	if (frame_header == NULL \|\|
3990	frame_header < (char *)mbuf_datastart(m) \|\|
3991	frame_header > (char *)m->m_data \|\|
3992	(adj = (m->m_data - frame_header)) >
3993	m->m_pkthdr.csum_rx_start) {
3994	m->m_pkthdr.csum_data = `0`;
3995	m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
3996	hwcksum_in_invalidated++;
3997	} else {
3998	m->m_pkthdr.csum_rx_start -= adj;
3999	}
4000	}
4001
4002	if (clat_debug)
4003	pktap_input(ifp, protocol_family, m, frame_header);
4004
4005	if (m->m_flags & (M_BCAST\|M_MCAST))
4006	atomic_add_64(&ifp->if_imcasts, `1`);
4007
4008	/ run interface filters, exclude VLAN packets PR-3586856 /
4009	if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) == `0`) {
4010	error = dlil_interface_filters_input(ifp, &m,
4011	&frame_header, protocol_family);
4012	if (error != `0`) {
4013	if (error != EJUSTRETURN)
4014	m_freem(m);
4015	goto next;
4016	}
4017	}
4018	if (error != `0` \|\| ((m->m_flags & M_PROMISC) != `0`)) {
4019	m_freem(m);
4020	goto next;
4021	}
4022
4023	/ Lookup the protocol attachment to this interface /
4024	if (protocol_family == `0`) {
4025	ifproto = NULL;
4026	} else if (last_ifproto != NULL && last_ifproto->ifp == ifp &&
4027	(last_ifproto->protocol_family == protocol_family)) {
4028	VERIFY(ifproto == NULL);
4029	ifproto = last_ifproto;
4030	if_proto_ref(last_ifproto);
4031	} else {
4032	VERIFY(ifproto == NULL);
4033	ifnet_lock_shared(ifp);
4034	/ callee holds a proto refcnt upon success /
4035	ifproto = find_attached_proto(ifp, protocol_family);
4036	ifnet_lock_done(ifp);
4037	}
4038	if (ifproto == NULL) {
4039	/ no protocol for this packet, discard /
4040	m_freem(m);
4041	goto next;
4042	}
4043	if (ifproto != last_ifproto) {
4044	if (last_ifproto != NULL) {
4045	/ pass up the list for the previous protocol /
4046	dlil_ifproto_input(last_ifproto, pkt_first);
4047	pkt_first = NULL;
4048	if_proto_free(last_ifproto);
4049	}
4050	last_ifproto = ifproto;
4051	if_proto_ref(ifproto);
4052	}
4053	/ extend the list /
4054	m->m_pkthdr.pkt_hdr = frame_header;
4055	if (pkt_first == NULL) {
4056	pkt_first = m;
4057	} else {
4058	*pkt_next = m;
4059	}
4060	pkt_next = &m->m_nextpkt;
4061
4062	next:
4063	if (next_packet == NULL && last_ifproto != NULL) {
4064	/ pass up the last list of packets /
4065	dlil_ifproto_input(last_ifproto, pkt_first);
4066	if_proto_free(last_ifproto);
4067	last_ifproto = NULL;
4068	}
4069	if (ifproto != NULL) {
4070	if_proto_free(ifproto);
4071	ifproto = NULL;
4072	}
4073
4074	m = next_packet;
4075
4076	/ update the driver's multicast filter, if needed /
4077	if (ifp->if_updatemcasts > `0` && if_mcasts_update(ifp) == `0`)
4078	ifp->if_updatemcasts = `0`;
4079	if (iorefcnt == `1`)
4080	ifnet_decr_iorefcnt(ifp);
4081	}
4082
4083	KERNEL_DEBUG(DBG_FNC_DLIL_INPUT \| DBG_FUNC_END, `0`, `0`, `0`, `0`, `0`);
4084	}
4085
4086	errno_t
4087	if_mcasts_update(struct ifnet *ifp)
4088	{
4089	errno_t err;
4090
4091	err = ifnet_ioctl(ifp, `0`, SIOCADDMULTI, NULL);
4092	if (err == EAFNOSUPPORT)
4093	err = `0`;
4094	printf("%s: %s %d suspended link-layer multicast membership(s) "
4095	"(err=%d)\n", if_name(ifp),
4096	(err == `0` ? "successfully restored" : "failed to restore"),
4097	ifp->if_updatemcasts, err);
4098
4099	/ just return success /
4100	return (`0`);
4101	}
4102
4103	/ If ifp is set, we will increment the generation for the interface /
4104	int
4105	dlil_post_complete_msg(struct ifnet ifp, struct* kev_msg *event)
4106	{
4107	if (ifp != NULL) {
4108	ifnet_increment_generation(ifp);
4109	}
4110
4111	#if NECP
4112	necp_update_all_clients();
4113	#endif /* NECP */
4114
4115	return (kev_post_msg(event));
4116	}
4117
4118	__private_extern__ void
4119	dlil_post_sifflags_msg(struct ifnet * ifp)
4120	{
4121	struct kev_msg ev_msg;
4122	struct net_event_data ev_data;
4123
4124	bzero(&ev_data, sizeof (ev_data));
4125	bzero(&ev_msg, sizeof (ev_msg));
4126	ev_msg.vendor_code = KEV_VENDOR_APPLE;
4127	ev_msg.kev_class = KEV_NETWORK_CLASS;
4128	ev_msg.kev_subclass = KEV_DL_SUBCLASS;
4129	ev_msg.event_code = KEV_DL_SIFFLAGS;
4130	strlcpy(&ev_data.if_name[`0`], ifp->if_name, IFNAMSIZ);
4131	ev_data.if_family = ifp->if_family;
4132	ev_data.if_unit = (u_int32_t) ifp->if_unit;
4133	ev_msg.dv[`0`].data_length = sizeof(struct net_event_data);
4134	ev_msg.dv[`0`].data_ptr = &ev_data;
4135	ev_msg.dv[`1`].data_length = `0`;
4136	dlil_post_complete_msg(ifp, &ev_msg);
4137	}
4138
4139	#define TMP_IF_PROTO_ARR_SIZE 10
4140	static int
4141	dlil_event_internal(struct ifnet ifp, struct* kev_msg *event, bool update_generation)
4142	{
4143	struct ifnet_filter *filter = NULL;
4144	struct if_proto *proto = NULL;
4145	int if_proto_count = `0`;
4146	struct if_proto **tmp_ifproto_arr = NULL;
4147	struct if_proto *tmp_ifproto_stack_arr[TMP_IF_PROTO_ARR_SIZE] = {NULL};
4148	int tmp_ifproto_arr_idx = `0`;
4149	bool tmp_malloc = false;
4150
4151	/*
4152	* Pass the event to the interface filters
4153	*/
4154	lck_mtx_lock_spin(&ifp->if_flt_lock);
4155	/ prevent filter list from changing in case we drop the lock /
4156	if_flt_monitor_busy(ifp);
4157	TAILQ_FOREACH(filter, &ifp->if_flt_head, filt_next) {
4158	if (filter->filt_event != NULL) {
4159	lck_mtx_unlock(&ifp->if_flt_lock);
4160
4161	filter->filt_event(filter->filt_cookie, ifp,
4162	filter->filt_protocol, event);
4163
4164	lck_mtx_lock_spin(&ifp->if_flt_lock);
4165	}
4166	}
4167	/ we're done with the filter list /
4168	if_flt_monitor_unbusy(ifp);
4169	lck_mtx_unlock(&ifp->if_flt_lock);
4170
4171	/ Get an io ref count if the interface is attached /
4172	if (!ifnet_is_attached(ifp, `1`))
4173	goto done;
4174
4175	/*
4176	* An embedded tmp_list_entry in if_proto may still get
4177	* over-written by another thread after giving up ifnet lock,
4178	* therefore we are avoiding embedded pointers here.
4179	*/
4180	ifnet_lock_shared(ifp);
4181	if_proto_count = dlil_ifp_protolist(ifp, NULL, `0`);
4182	if (if_proto_count) {
4183	int i;
4184	VERIFY(ifp->if_proto_hash != NULL);
4185	if (if_proto_count <= TMP_IF_PROTO_ARR_SIZE) {
4186	tmp_ifproto_arr = tmp_ifproto_stack_arr;
4187	} else {
4188	MALLOC(tmp_ifproto_arr, struct if_proto **,
4189	sizeof (tmp_ifproto_arr) if_proto_count,
4190	M_TEMP, M_ZERO);
4191	if (tmp_ifproto_arr == NULL) {
4192	ifnet_lock_done(ifp);
4193	goto cleanup;
4194	}
4195	tmp_malloc = true;
4196	}
4197
4198	for (i = `0`; i < PROTO_HASH_SLOTS; i++) {
4199	SLIST_FOREACH(proto, &ifp->if_proto_hash[i],
4200	next_hash) {
4201	if_proto_ref(proto);
4202	tmp_ifproto_arr[tmp_ifproto_arr_idx] = proto;
4203	tmp_ifproto_arr_idx++;
4204	}
4205	}
4206	VERIFY(if_proto_count == tmp_ifproto_arr_idx);
4207	}
4208	ifnet_lock_done(ifp);
4209
4210	for (tmp_ifproto_arr_idx = `0`; tmp_ifproto_arr_idx < if_proto_count;
4211	tmp_ifproto_arr_idx++) {
4212	proto = tmp_ifproto_arr[tmp_ifproto_arr_idx];
4213	VERIFY(proto != NULL);
4214	proto_media_event eventp =
4215	(proto->proto_kpi == kProtoKPI_v1 ?
4216	proto->kpi.v1.event :
4217	proto->kpi.v2.event);
4218
4219	if (eventp != NULL) {
4220	eventp(ifp, proto->protocol_family,
4221	event);
4222	}
4223	if_proto_free(proto);
4224	}
4225
4226	cleanup:
4227	if (tmp_malloc) {
4228	FREE(tmp_ifproto_arr, M_TEMP);
4229	}
4230
4231	/ Pass the event to the interface /
4232	if (ifp->if_event != NULL)
4233	ifp->if_event(ifp, event);
4234
4235	/ Release the io ref count /
4236	ifnet_decr_iorefcnt(ifp);
4237	done:
4238	return (dlil_post_complete_msg(update_generation ? ifp : NULL, event));
4239	}
4240
4241	errno_t
4242	ifnet_event(ifnet_t ifp, struct kern_event_msg *event)
4243	{
4244	struct kev_msg kev_msg;
4245	int result = `0`;
4246
4247	if (ifp == NULL \|\| event == NULL)
4248	return (EINVAL);
4249
4250	bzero(&kev_msg, sizeof (kev_msg));
4251	kev_msg.vendor_code = event->vendor_code;
4252	kev_msg.kev_class = event->kev_class;
4253	kev_msg.kev_subclass = event->kev_subclass;
4254	kev_msg.event_code = event->event_code;
4255	kev_msg.dv[`0`].data_ptr = &event->event_data[`0`];
4256	kev_msg.dv[`0`].data_length = event->total_size - KEV_MSG_HEADER_SIZE;
4257	kev_msg.dv[`1`].data_length = `0`;
4258
4259	result = dlil_event_internal(ifp, &kev_msg, TRUE);
4260
4261	return (result);
4262	}
4263
4264	#if CONFIG_MACF_NET
4265	#include <netinet/ip6.h>
4266	#include <netinet/ip.h>
4267	static int
4268	dlil_get_socket_type(struct mbuf *mp, int* family, int raw)
4269	{
4270	struct mbuf *m;
4271	struct ip *ip;
4272	struct ip6_hdr *ip6;
4273	int type = SOCK_RAW;
4274
4275	if (!raw) {
4276	switch (family) {
4277	case PF_INET:
4278	m = m_pullup(mp, sizeof(struct* ip));
4279	if (m == NULL)
4280	break;
4281	*mp = m;
4282	ip = mtod(m, struct ip *);
4283	if (ip->ip_p == IPPROTO_TCP)
4284	type = SOCK_STREAM;
4285	else if (ip->ip_p == IPPROTO_UDP)
4286	type = SOCK_DGRAM;
4287	break;
4288	case PF_INET6:
4289	m = m_pullup(mp, sizeof(struct* ip6_hdr));
4290	if (m == NULL)
4291	break;
4292	*mp = m;
4293	ip6 = mtod(m, struct ip6_hdr *);
4294	if (ip6->ip6_nxt == IPPROTO_TCP)
4295	type = SOCK_STREAM;
4296	else if (ip6->ip6_nxt == IPPROTO_UDP)
4297	type = SOCK_DGRAM;
4298	break;
4299	}
4300	}
4301
4302	return (type);
4303	}
4304	#endif
4305
4306	static void
4307	dlil_count_chain_len(mbuf_t m, struct chain_len_stats *cls)
4308	{
4309	mbuf_t n = m;
4310	int chainlen = `0`;
4311
4312	while (n != NULL) {
4313	chainlen++;
4314	n = n->m_next;
4315	}
4316	switch (chainlen) {
4317	case `0`:
4318	break;
4319	case `1`:
4320	atomic_add_64(&cls->cls_one, `1`);
4321	break;
4322	case `2`:
4323	atomic_add_64(&cls->cls_two, `1`);
4324	break;
4325	case `3`:
4326	atomic_add_64(&cls->cls_three, `1`);
4327	break;
4328	case `4`:
4329	atomic_add_64(&cls->cls_four, `1`);
4330	break;
4331	case `5`:
4332	default:
4333	atomic_add_64(&cls->cls_five_or_more, `1`);
4334	break;
4335	}
4336	}
4337
4338	/*
4339	* dlil_output
4340	*
4341	* Caller should have a lock on the protocol domain if the protocol
4342	* doesn't support finer grained locking. In most cases, the lock
4343	* will be held from the socket layer and won't be released until
4344	* we return back to the socket layer.
4345	*
4346	* This does mean that we must take a protocol lock before we take
4347	* an interface lock if we're going to take both. This makes sense
4348	* because a protocol is likely to interact with an ifp while it
4349	* is under the protocol lock.
4350	*
4351	* An advisory code will be returned if adv is not null. This
4352	* can be used to provide feedback about interface queues to the
4353	* application.
4354	*/
4355	errno_t
4356	dlil_output(ifnet_t ifp, protocol_family_t proto_family, mbuf_t packetlist,
4357	void route, const* struct sockaddr dest, int* raw, struct flowadv *adv)
4358	{
4359	char *frame_type = NULL;
4360	char *dst_linkaddr = NULL;
4361	int retval = `0`;
4362	char frame_type_buffer[MAX_FRAME_TYPE_SIZE * `4`];
4363	char dst_linkaddr_buffer[MAX_LINKADDR * `4`];
4364	struct if_proto *proto = NULL;
4365	mbuf_t m = NULL;
4366	mbuf_t send_head = NULL;
4367	mbuf_t *send_tail = &send_head;
4368	int iorefcnt = `0`;
4369	u_int32_t pre = `0`, post = `0`;
4370	u_int32_t fpkts = `0`, fbytes = `0`;
4371	int32_t flen = `0`;
4372	struct timespec now;
4373	u_int64_t now_nsec;
4374	boolean_t did_clat46 = FALSE;
4375	protocol_family_t old_proto_family = proto_family;
4376	struct rtentry *rt = NULL;
4377
4378	KERNEL_DEBUG(DBG_FNC_DLIL_OUTPUT \| DBG_FUNC_START, `0`, `0`, `0`, `0`, `0`);
4379
4380	/*
4381	* Get an io refcnt if the interface is attached to prevent ifnet_detach
4382	* from happening while this operation is in progress
4383	*/
4384	if (!ifnet_is_attached(ifp, `1`)) {
4385	retval = ENXIO;
4386	goto cleanup;
4387	}
4388	iorefcnt = `1`;
4389
4390	VERIFY(ifp->if_output_dlil != NULL);
4391
4392	/ update the driver's multicast filter, if needed /
4393	if (ifp->if_updatemcasts > `0` && if_mcasts_update(ifp) == `0`)
4394	ifp->if_updatemcasts = `0`;
4395
4396	frame_type = frame_type_buffer;
4397	dst_linkaddr = dst_linkaddr_buffer;
4398
4399	if (raw == `0`) {
4400	ifnet_lock_shared(ifp);
4401	/ callee holds a proto refcnt upon success /
4402	proto = find_attached_proto(ifp, proto_family);
4403	if (proto == NULL) {
4404	ifnet_lock_done(ifp);
4405	retval = ENXIO;
4406	goto cleanup;
4407	}
4408	ifnet_lock_done(ifp);
4409	}
4410
4411	preout_again:
4412	if (packetlist == NULL)
4413	goto cleanup;
4414
4415	m = packetlist;
4416	packetlist = packetlist->m_nextpkt;
4417	m->m_nextpkt = NULL;
4418
4419	/*
4420	* Perform address family translation for the first
4421	* packet outside the loop in order to perform address
4422	* lookup for the translated proto family.
4423	*/
4424	if (proto_family == PF_INET && IS_INTF_CLAT46(ifp) &&
4425	(ifp->if_type == IFT_CELLULAR \|\|
4426	dlil_is_clat_needed(proto_family, m))) {
4427	retval = dlil_clat46(ifp, &proto_family, &m);
4428	/*
4429	* Go to the next packet if translation fails
4430	*/
4431	if (retval != `0`) {
4432	m_freem(m);
4433	m = NULL;
4434	ip6stat.ip6s_clat464_out_drop++;
4435	/ Make sure that the proto family is PF_INET /
4436	ASSERT(proto_family == PF_INET);
4437	goto preout_again;
4438	}
4439	/*
4440	* Free the old one and make it point to the IPv6 proto structure.
4441	*
4442	* Change proto for the first time we have successfully
4443	* performed address family translation.
4444	*/
4445	if (!did_clat46 && proto_family == PF_INET6) {
4446	struct sockaddr_in6 dest6;
4447	did_clat46 = TRUE;
4448
4449	if (proto != NULL)
4450	if_proto_free(proto);
4451	ifnet_lock_shared(ifp);
4452	/ callee holds a proto refcnt upon success /
4453	proto = find_attached_proto(ifp, proto_family);
4454	if (proto == NULL) {
4455	ifnet_lock_done(ifp);
4456	retval = ENXIO;
4457	m_freem(m);
4458	m = NULL;
4459	goto cleanup;
4460	}
4461	ifnet_lock_done(ifp);
4462	if (ifp->if_type == IFT_ETHER) {
4463	/ Update the dest to translated v6 address /
4464	dest6.sin6_len = sizeof(struct sockaddr_in6);
4465	dest6.sin6_family = AF_INET6;
4466	dest6.sin6_addr = (mtod(m, struct ip6_hdr *))->ip6_dst;
4467	dest = (const struct sockaddr *)&dest6;
4468
4469	/*
4470	* Lookup route to the translated destination
4471	* Free this route ref during cleanup
4472	*/
4473	rt = rtalloc1_scoped((struct sockaddr *)&dest6,
4474	`0`, `0`, ifp->if_index);
4475
4476	route = rt;
4477	}
4478	}
4479	}
4480
4481	/*
4482	* This path gets packet chain going to the same destination.
4483	* The pre output routine is used to either trigger resolution of
4484	* the next hop or retreive the next hop's link layer addressing.
4485	* For ex: ether_inet(6)_pre_output routine.
4486	*
4487	* If the routine returns EJUSTRETURN, it implies that packet has
4488	* been queued, and therefore we have to call preout_again for the
4489	* following packet in the chain.
4490	*
4491	* For errors other than EJUSTRETURN, the current packet is freed
4492	* and the rest of the chain (pointed by packetlist is freed as
4493	* part of clean up.
4494	*
4495	* Else if there is no error the retrieved information is used for
4496	* all the packets in the chain.
4497	*/
4498	if (raw == `0`) {
4499	proto_media_preout preoutp = (proto->proto_kpi == kProtoKPI_v1 ?
4500	proto->kpi.v1.pre_output : proto->kpi.v2.pre_output);
4501	retval = `0`;
4502	if (preoutp != NULL) {
4503	retval = preoutp(ifp, proto_family, &m, dest, route,
4504	frame_type, dst_linkaddr);
4505
4506	if (retval != `0`) {
4507	if (retval == EJUSTRETURN)
4508	goto preout_again;
4509	m_freem(m);
4510	m = NULL;
4511	goto cleanup;
4512	}
4513	}
4514	}
4515
4516	#if CONFIG_MACF_NET
4517	retval = mac_ifnet_check_transmit(ifp, m, proto_family,
4518	dlil_get_socket_type(&m, proto_family, raw));
4519	if (retval != `0`) {
4520	m_freem(m);
4521	goto cleanup;
4522	}
4523	#endif
4524
4525	do {
4526	/*
4527	* Perform address family translation if needed.
4528	* For now we only support stateless 4 to 6 translation
4529	* on the out path.
4530	*
4531	* The routine below translates IP header, updates protocol
4532	* checksum and also translates ICMP.
4533	*
4534	* We skip the first packet as it is already translated and
4535	* the proto family is set to PF_INET6.
4536	*/
4537	if (proto_family == PF_INET && IS_INTF_CLAT46(ifp) &&
4538	(ifp->if_type == IFT_CELLULAR \|\|
4539	dlil_is_clat_needed(proto_family, m))) {
4540	retval = dlil_clat46(ifp, &proto_family, &m);
4541	/ Goto the next packet if the translation fails /
4542	if (retval != `0`) {
4543	m_freem(m);
4544	m = NULL;
4545	ip6stat.ip6s_clat464_out_drop++;
4546	goto next;
4547	}
4548	}
4549
4550	#if CONFIG_DTRACE
4551	if (!raw && proto_family == PF_INET) {
4552	struct ip ip = mtod(m, struct* ip *);
4553	DTRACE_IP6(send, struct mbuf , m, struct* inpcb *, NULL,
4554	struct ip , ip, struct* ifnet *, ifp,
4555	struct ip , ip, struct* ip6_hdr *, NULL);
4556
4557	} else if (!raw && proto_family == PF_INET6) {
4558	struct ip6_hdr ip6 = mtod(m, struct* ip6_hdr *);
4559	DTRACE_IP6(send, struct mbuf , m, struct* inpcb *, NULL,
4560	struct ip6_hdr , ip6, struct* ifnet *, ifp,
4561	struct ip , NULL, struct* ip6_hdr *, ip6);
4562	}
4563	#endif /* CONFIG_DTRACE */
4564
4565	if (raw == `0` && ifp->if_framer != NULL) {
4566	int rcvif_set = `0`;
4567
4568	/*
4569	* If this is a broadcast packet that needs to be
4570	* looped back into the system, set the inbound ifp
4571	* to that of the outbound ifp. This will allow
4572	* us to determine that it is a legitimate packet
4573	* for the system. Only set the ifp if it's not
4574	* already set, just to be safe.
4575	*/
4576	if ((m->m_flags & (M_BCAST \| M_LOOP)) &&
4577	m->m_pkthdr.rcvif == NULL) {
4578	m->m_pkthdr.rcvif = ifp;
4579	rcvif_set = `1`;
4580	}
4581
4582	retval = ifp->if_framer(ifp, &m, dest, dst_linkaddr,
4583	frame_type, &pre, &post);
4584	if (retval != `0`) {
4585	if (retval != EJUSTRETURN)
4586	m_freem(m);
4587	goto next;
4588	}
4589
4590	/*
4591	* For partial checksum offload, adjust the start
4592	* and stuff offsets based on the prepended header.
4593	*/
4594	if ((m->m_pkthdr.csum_flags &
4595	(CSUM_DATA_VALID \| CSUM_PARTIAL)) ==
4596	(CSUM_DATA_VALID \| CSUM_PARTIAL)) {
4597	m->m_pkthdr.csum_tx_stuff += pre;
4598	m->m_pkthdr.csum_tx_start += pre;
4599	}
4600
4601	if (hwcksum_dbg != `0` && !(ifp->if_flags & IFF_LOOPBACK))
4602	dlil_output_cksum_dbg(ifp, m, pre,
4603	proto_family);
4604
4605	/*
4606	* Clear the ifp if it was set above, and to be
4607	* safe, only if it is still the same as the
4608	* outbound ifp we have in context. If it was
4609	* looped back, then a copy of it was sent to the
4610	* loopback interface with the rcvif set, and we
4611	* are clearing the one that will go down to the
4612	* layer below.
4613	*/
4614	if (rcvif_set && m->m_pkthdr.rcvif == ifp)
4615	m->m_pkthdr.rcvif = NULL;
4616	}
4617
4618	/*
4619	* Let interface filters (if any) do their thing ...
4620	*/
4621	/ Do not pass VLAN tagged packets to filters PR-3586856 /
4622	if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) == `0`) {
4623	retval = dlil_interface_filters_output(ifp,
4624	&m, proto_family);
4625	if (retval != `0`) {
4626	if (retval != EJUSTRETURN)
4627	m_freem(m);
4628	goto next;
4629	}
4630	}
4631	/*
4632	* Strip away M_PROTO1 bit prior to sending packet
4633	* to the driver as this field may be used by the driver
4634	*/
4635	m->m_flags &= ~M_PROTO1;
4636
4637	/*
4638	* If the underlying interface is not capable of handling a
4639	* packet whose data portion spans across physically disjoint
4640	* pages, we need to "normalize" the packet so that we pass
4641	* down a chain of mbufs where each mbuf points to a span that
4642	* resides in the system page boundary. If the packet does
4643	* not cross page(s), the following is a no-op.
4644	*/
4645	if (!(ifp->if_hwassist & IFNET_MULTIPAGES)) {
4646	if ((m = m_normalize(m)) == NULL)
4647	goto next;
4648	}
4649
4650	/*
4651	* If this is a TSO packet, make sure the interface still
4652	* advertise TSO capability.
4653	*/
4654	if (TSO_IPV4_NOTOK(ifp, m) \|\| TSO_IPV6_NOTOK(ifp, m)) {
4655	retval = EMSGSIZE;
4656	m_freem(m);
4657	goto cleanup;
4658	}
4659
4660	ifp_inc_traffic_class_out(ifp, m);
4661	pktap_output(ifp, proto_family, m, pre, post);
4662
4663	/*
4664	* Count the number of elements in the mbuf chain
4665	*/
4666	if (tx_chain_len_count) {
4667	dlil_count_chain_len(m, &tx_chain_len_stats);
4668	}
4669
4670	/*
4671	* Record timestamp; ifnet_enqueue() will use this info
4672	* rather than redoing the work. An optimization could
4673	* involve doing this just once at the top, if there are
4674	* no interface filters attached, but that's probably
4675	* not a big deal.
4676	*/
4677	nanouptime(&now);
4678	net_timernsec(&now, &now_nsec);
4679	(void) mbuf_set_timestamp(m, now_nsec, TRUE);
4680
4681	/*
4682	* Discard partial sum information if this packet originated
4683	* from another interface; the packet would already have the
4684	* final checksum and we shouldn't recompute it.
4685	*/
4686	if ((m->m_pkthdr.pkt_flags & PKTF_FORWARDED) &&
4687	(m->m_pkthdr.csum_flags & (CSUM_DATA_VALID\|CSUM_PARTIAL)) ==
4688	(CSUM_DATA_VALID\|CSUM_PARTIAL)) {
4689	m->m_pkthdr.csum_flags &= ~CSUM_TX_FLAGS;
4690	m->m_pkthdr.csum_data = `0`;
4691	}
4692
4693	/*
4694	* Finally, call the driver.
4695	*/
4696	if (ifp->if_eflags & (IFEF_SENDLIST \| IFEF_ENQUEUE_MULTI)) {
4697	if (m->m_pkthdr.pkt_flags & PKTF_FORWARDED) {
4698	flen += (m_pktlen(m) - (pre + post));
4699	m->m_pkthdr.pkt_flags &= ~PKTF_FORWARDED;
4700	}
4701	*send_tail = m;
4702	send_tail = &m->m_nextpkt;
4703	} else {
4704	if (m->m_pkthdr.pkt_flags & PKTF_FORWARDED) {
4705	flen = (m_pktlen(m) - (pre + post));
4706	m->m_pkthdr.pkt_flags &= ~PKTF_FORWARDED;
4707	} else {
4708	flen = `0`;
4709	}
4710	KERNEL_DEBUG(DBG_FNC_DLIL_IFOUT \| DBG_FUNC_START,
4711	`0`, `0`, `0`, `0`, `0`);
4712	retval = (*ifp->if_output_dlil)(ifp, m);
4713	if (retval == EQFULL \|\| retval == EQSUSPENDED) {
4714	if (adv != NULL && adv->code == FADV_SUCCESS) {
4715	adv->code = (retval == EQFULL ?
4716	FADV_FLOW_CONTROLLED :
4717	FADV_SUSPENDED);
4718	}
4719	retval = `0`;
4720	}
4721	if (retval == `0` && flen > `0`) {
4722	fbytes += flen;
4723	fpkts++;
4724	}
4725	if (retval != `0` && dlil_verbose) {
4726	printf("%s: output error on %s retval = %d\n",
4727	__func__, if_name(ifp),
4728	retval);
4729	}
4730	KERNEL_DEBUG(DBG_FNC_DLIL_IFOUT \| DBG_FUNC_END,
4731	`0`, `0`, `0`, `0`, `0`);
4732	}
4733	KERNEL_DEBUG(DBG_FNC_DLIL_IFOUT \| DBG_FUNC_END, `0`, `0`, `0`, `0`, `0`);
4734
4735	next:
4736	m = packetlist;
4737	if (m != NULL) {
4738	packetlist = packetlist->m_nextpkt;
4739	m->m_nextpkt = NULL;
4740	}
4741	/ Reset the proto family to old proto family for CLAT /
4742	if (did_clat46)
4743	proto_family = old_proto_family;
4744	} while (m != NULL);
4745
4746	if (send_head != NULL) {
4747	KERNEL_DEBUG(DBG_FNC_DLIL_IFOUT \| DBG_FUNC_START,
4748	`0`, `0`, `0`, `0`, `0`);
4749	if (ifp->if_eflags & IFEF_SENDLIST) {
4750	retval = (*ifp->if_output_dlil)(ifp, send_head);
4751	if (retval == EQFULL \|\| retval == EQSUSPENDED) {
4752	if (adv != NULL) {
4753	adv->code = (retval == EQFULL ?
4754	FADV_FLOW_CONTROLLED :
4755	FADV_SUSPENDED);
4756	}
4757	retval = `0`;
4758	}
4759	if (retval == `0` && flen > `0`) {
4760	fbytes += flen;
4761	fpkts++;
4762	}
4763	if (retval != `0` && dlil_verbose) {
4764	printf("%s: output error on %s retval = %d\n",
4765	__func__, if_name(ifp), retval);
4766	}
4767	} else {
4768	struct mbuf *send_m;
4769	int enq_cnt = `0`;
4770	VERIFY(ifp->if_eflags & IFEF_ENQUEUE_MULTI);
4771	while (send_head != NULL) {
4772	send_m = send_head;
4773	send_head = send_m->m_nextpkt;
4774	send_m->m_nextpkt = NULL;
4775	retval = (*ifp->if_output_dlil)(ifp, send_m);
4776	if (retval == EQFULL \|\| retval == EQSUSPENDED) {
4777	if (adv != NULL) {
4778	adv->code = (retval == EQFULL ?
4779	FADV_FLOW_CONTROLLED :
4780	FADV_SUSPENDED);
4781	}
4782	retval = `0`;
4783	}
4784	if (retval == `0`) {
4785	enq_cnt++;
4786	if (flen > `0`)
4787	fpkts++;
4788	}
4789	if (retval != `0` && dlil_verbose) {
4790	printf("%s: output error on %s "
4791	"retval = %d\n",
4792	__func__, if_name(ifp), retval);
4793	}
4794	}
4795	if (enq_cnt > `0`) {
4796	fbytes += flen;
4797	ifnet_start(ifp);
4798	}
4799	}
4800	KERNEL_DEBUG(DBG_FNC_DLIL_IFOUT \| DBG_FUNC_END, `0`, `0`, `0`, `0`, `0`);
4801	}
4802
4803	KERNEL_DEBUG(DBG_FNC_DLIL_OUTPUT \| DBG_FUNC_END, `0`, `0`, `0`, `0`, `0`);
4804
4805	cleanup:
4806	if (fbytes > `0`)
4807	ifp->if_fbytes += fbytes;
4808	if (fpkts > `0`)
4809	ifp->if_fpackets += fpkts;
4810	if (proto != NULL)
4811	if_proto_free(proto);
4812	if (packetlist) / if any packets are left, clean up /
4813	mbuf_freem_list(packetlist);
4814	if (retval == EJUSTRETURN)
4815	retval = `0`;
4816	if (iorefcnt == `1`)
4817	ifnet_decr_iorefcnt(ifp);
4818	if (rt != NULL) {
4819	rtfree(rt);
4820	rt = NULL;
4821	}
4822
4823	return (retval);
4824	}
4825
4826	/*
4827	* This routine checks if the destination address is not a loopback, link-local,
4828	* multicast or broadcast address.
4829	*/
4830	static int
4831	dlil_is_clat_needed(protocol_family_t proto_family, mbuf_t m)
4832	{
4833	int ret = `0`;
4834	switch(proto_family) {
4835	case PF_INET: {
4836	struct ip iph = mtod(m, struct* ip *);
4837	if (CLAT46_NEEDED(ntohl(iph->ip_dst.s_addr)))
4838	ret = `1`;
4839	break;
4840	}
4841	case PF_INET6: {
4842	struct ip6_hdr ip6h = mtod(m, struct* ip6_hdr *);
4843	if ((size_t)m_pktlen(m) >= sizeof(struct ip6_hdr) &&
4844	CLAT64_NEEDED(&ip6h->ip6_dst))
4845	ret = `1`;
4846	break;
4847	}
4848	}
4849
4850	return (ret);
4851	}
4852	/*
4853	* @brief This routine translates IPv4 packet to IPv6 packet,
4854	* updates protocol checksum and also translates ICMP for code
4855	* along with inner header translation.
4856	*
4857	* @param ifp Pointer to the interface
4858	* @param proto_family pointer to protocol family. It is updated if function
4859	* performs the translation successfully.
4860	* @param m Pointer to the pointer pointing to the packet. Needed because this
4861	* routine can end up changing the mbuf to a different one.
4862	*
4863	* @return 0 on success or else a negative value.
4864	*/
4865	static errno_t
4866	dlil_clat46(ifnet_t ifp, protocol_family_t proto_family, mbuf_t m)
4867	{
4868	VERIFY(*proto_family == PF_INET);
4869	VERIFY(IS_INTF_CLAT46(ifp));
4870
4871	pbuf_t pbuf_store, *pbuf = NULL;
4872	struct ip *iph = NULL;
4873	struct in_addr osrc, odst;
4874	uint8_t proto = `0`;
4875	struct in6_ifaddr *ia6_clat_src = NULL;
4876	struct in6_addr *src = NULL;
4877	struct in6_addr dst;
4878	int error = `0`;
4879	uint32_t off = `0`;
4880	uint64_t tot_len = `0`;
4881	uint16_t ip_id_val = `0`;
4882	uint16_t ip_frag_off = `0`;
4883
4884	boolean_t is_frag = FALSE;
4885	boolean_t is_first_frag = TRUE;
4886	boolean_t is_last_frag = TRUE;
4887
4888	pbuf_init_mbuf(&pbuf_store, *m, ifp);
4889	pbuf = &pbuf_store;
4890	iph = pbuf->pb_data;
4891
4892	osrc = iph->ip_src;
4893	odst = iph->ip_dst;
4894	proto = iph->ip_p;
4895	off = iph->ip_hl << `2`;
4896	ip_id_val = iph->ip_id;
4897	ip_frag_off = ntohs(iph->ip_off) & IP_OFFMASK;
4898
4899	tot_len = ntohs(iph->ip_len);
4900
4901	/*
4902	* For packets that are not first frags
4903	* we only need to adjust CSUM.
4904	* For 4 to 6, Fragmentation header gets appended
4905	* after proto translation.
4906	*/
4907	if (ntohs(iph->ip_off) & ~(IP_DF \| IP_RF)) {
4908	is_frag = TRUE;
4909
4910	/ If the offset is not zero, it is not first frag /
4911	if (ip_frag_off != `0`)
4912	is_first_frag = FALSE;
4913
4914	/ If IP_MF is set, then it is not last frag /
4915	if (ntohs(iph->ip_off) & IP_MF)
4916	is_last_frag = FALSE;
4917	}
4918
4919	/*
4920	* Retrive the local IPv6 CLAT46 address reserved for stateless
4921	* translation.
4922	*/
4923	ia6_clat_src = in6ifa_ifpwithflag(ifp, IN6_IFF_CLAT46);
4924	if (ia6_clat_src == NULL) {
4925	ip6stat.ip6s_clat464_out_nov6addr_drop++;
4926	error = -`1`;
4927	goto cleanup;
4928	}
4929
4930	src = &ia6_clat_src->ia_addr.sin6_addr;
4931
4932	/*
4933	* Translate IPv4 destination to IPv6 destination by using the
4934	* prefixes learned through prior PLAT discovery.
4935	*/
4936	if ((error = nat464_synthesize_ipv6(ifp, &odst, &dst)) != `0`) {
4937	ip6stat.ip6s_clat464_out_v6synthfail_drop++;
4938	goto cleanup;
4939	}
4940
4941	/ Translate the IP header part first /
4942	error = (nat464_translate_46(pbuf, off, iph->ip_tos, iph->ip_p,
4943	iph->ip_ttl, *src, dst, tot_len) == NT_NAT64) ? `0` : -`1`;
4944
4945	iph = NULL; / Invalidate iph as pbuf has been modified /
4946
4947	if (error != `0`) {
4948	ip6stat.ip6s_clat464_out_46transfail_drop++;
4949	goto cleanup;
4950	}
4951
4952	/*
4953	* Translate protocol header, update checksum, checksum flags
4954	* and related fields.
4955	*/
4956	error = (nat464_translate_proto(pbuf, (struct nat464_addr )&osrc, (struct* nat464_addr *)&odst,
4957	proto, PF_INET, PF_INET6, NT_OUT, !is_first_frag) == NT_NAT64) ? `0` : -`1`;
4958
4959	if (error != `0`) {
4960	ip6stat.ip6s_clat464_out_46proto_transfail_drop++;
4961	goto cleanup;
4962	}
4963
4964	/ Now insert the IPv6 fragment header /
4965	if (is_frag) {
4966	error = nat464_insert_frag46(pbuf, ip_id_val, ip_frag_off, is_last_frag);
4967
4968	if (error != `0`) {
4969	ip6stat.ip6s_clat464_out_46frag_transfail_drop++;
4970	goto cleanup;
4971	}
4972	}
4973
4974	cleanup:
4975	if (ia6_clat_src != NULL)
4976	IFA_REMREF(&ia6_clat_src->ia_ifa);
4977
4978	if (pbuf_is_valid(pbuf)) {
4979	*m = pbuf->pb_mbuf;
4980	pbuf->pb_mbuf = NULL;
4981	pbuf_destroy(pbuf);
4982	} else {
4983	error = -`1`;
4984	ip6stat.ip6s_clat464_out_invalpbuf_drop++;
4985	}
4986
4987	if (error == `0`) {
4988	*proto_family = PF_INET6;
4989	ip6stat.ip6s_clat464_out_success++;
4990	}
4991
4992	return (error);
4993	}
4994
4995	/*
4996	* @brief This routine translates incoming IPv6 to IPv4 packet,
4997	* updates protocol checksum and also translates ICMPv6 outer
4998	* and inner headers
4999	*
5000	* @return 0 on success or else a negative value.
5001	*/
5002	static errno_t
5003	dlil_clat64(ifnet_t ifp, protocol_family_t proto_family, mbuf_t m)
5004	{
5005	VERIFY(*proto_family == PF_INET6);
5006	VERIFY(IS_INTF_CLAT46(ifp));
5007
5008	struct ip6_hdr *ip6h = NULL;
5009	struct in6_addr osrc, odst;
5010	uint8_t proto = `0`;
5011	struct in6_ifaddr *ia6_clat_dst = NULL;
5012	struct in_ifaddr *ia4_clat_dst = NULL;
5013	struct in_addr *dst = NULL;
5014	struct in_addr src;
5015	int error = `0`;
5016	uint32_t off = `0`;
5017	u_int64_t tot_len = `0`;
5018	uint8_t tos = `0`;
5019	boolean_t is_first_frag = TRUE;
5020
5021	/ Incoming mbuf does not contain valid IP6 header /
5022	if ((size_t)(m)->m_pkthdr.len < sizeof(struct* ip6_hdr) \|\|
5023	((size_t)(m)->m_len < sizeof(struct* ip6_hdr) &&
5024	(m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL)) {
5025	ip6stat.ip6s_clat464_in_tooshort_drop++;
5026	return (-`1`);
5027	}
5028
5029	ip6h = mtod(m, struct* ip6_hdr *);
5030	/ Validate that mbuf contains IP payload equal to ip6_plen /
5031	if ((size_t)(m)->m_pkthdr.len < ntohs(ip6h->ip6_plen) + sizeof(struct* ip6_hdr)) {
5032	ip6stat.ip6s_clat464_in_tooshort_drop++;
5033	return (-`1`);
5034	}
5035
5036	osrc = ip6h->ip6_src;
5037	odst = ip6h->ip6_dst;
5038
5039	/*
5040	* Retrieve the local CLAT46 reserved IPv6 address.
5041	* Let the packet pass if we don't find one, as the flag
5042	* may get set before IPv6 configuration has taken place.
5043	*/
5044	ia6_clat_dst = in6ifa_ifpwithflag(ifp, IN6_IFF_CLAT46);
5045	if (ia6_clat_dst == NULL)
5046	goto done;
5047
5048	/*
5049	* Check if the original dest in the packet is same as the reserved
5050	* CLAT46 IPv6 address
5051	*/
5052	if (IN6_ARE_ADDR_EQUAL(&odst, &ia6_clat_dst->ia_addr.sin6_addr)) {
5053	pbuf_t pbuf_store, *pbuf = NULL;
5054	pbuf_init_mbuf(&pbuf_store, *m, ifp);
5055	pbuf = &pbuf_store;
5056
5057	/*
5058	* Retrive the local CLAT46 IPv4 address reserved for stateless
5059	* translation.
5060	*/
5061	ia4_clat_dst = inifa_ifpclatv4(ifp);
5062	if (ia4_clat_dst == NULL) {
5063	IFA_REMREF(&ia6_clat_dst->ia_ifa);
5064	ip6stat.ip6s_clat464_in_nov4addr_drop++;
5065	error = -`1`;
5066	goto cleanup;
5067	}
5068	IFA_REMREF(&ia6_clat_dst->ia_ifa);
5069
5070	/ Translate IPv6 src to IPv4 src by removing the NAT64 prefix /
5071	dst = &ia4_clat_dst->ia_addr.sin_addr;
5072	if ((error = nat464_synthesize_ipv4(ifp, &osrc, &src)) != `0`) {
5073	ip6stat.ip6s_clat464_in_v4synthfail_drop++;
5074	error = -`1`;
5075	goto cleanup;
5076	}
5077
5078	ip6h = pbuf->pb_data;
5079	off = sizeof(struct ip6_hdr);
5080	proto = ip6h->ip6_nxt;
5081	tos = (ntohl(ip6h->ip6_flow) >> `20`) & `0xff`;
5082	tot_len = ntohs(ip6h->ip6_plen) + sizeof(struct ip6_hdr);
5083
5084	/*
5085	* Translate the IP header and update the fragmentation
5086	* header if needed
5087	*/
5088	error = (nat464_translate_64(pbuf, off, tos, &proto,
5089	ip6h->ip6_hlim, src, *dst, tot_len, &is_first_frag) == NT_NAT64) ?
5090	`0` : -`1`;
5091
5092	ip6h = NULL; / Invalidate ip6h as pbuf has been changed /
5093
5094	if (error != `0`) {
5095	ip6stat.ip6s_clat464_in_64transfail_drop++;
5096	goto cleanup;
5097	}
5098
5099	/*
5100	* Translate protocol header, update checksum, checksum flags
5101	* and related fields.
5102	*/
5103	error = (nat464_translate_proto(pbuf, (struct nat464_addr *)&osrc,
5104	(struct nat464_addr *)&odst, proto, PF_INET6, PF_INET,
5105	NT_IN, !is_first_frag) == NT_NAT64) ? `0` : -`1`;
5106
5107	if (error != `0`) {
5108	ip6stat.ip6s_clat464_in_64proto_transfail_drop++;
5109	goto cleanup;
5110	}
5111
5112	cleanup:
5113	if (ia4_clat_dst != NULL)
5114	IFA_REMREF(&ia4_clat_dst->ia_ifa);
5115
5116	if (pbuf_is_valid(pbuf)) {
5117	*m = pbuf->pb_mbuf;
5118	pbuf->pb_mbuf = NULL;
5119	pbuf_destroy(pbuf);
5120	} else {
5121	error = -`1`;
5122	ip6stat.ip6s_clat464_in_invalpbuf_drop++;
5123	}
5124
5125	if (error == `0`) {
5126	*proto_family = PF_INET;
5127	ip6stat.ip6s_clat464_in_success++;
5128	}
5129	} / CLAT traffic /
5130
5131	done:
5132	return (error);
5133	}
5134
5135	errno_t
5136	ifnet_ioctl(ifnet_t ifp, protocol_family_t proto_fam, u_long ioctl_code,
5137	void *ioctl_arg)
5138	{
5139	struct ifnet_filter *filter;
5140	int retval = EOPNOTSUPP;
5141	int result = `0`;
5142
5143	if (ifp == NULL \|\| ioctl_code == `0`)
5144	return (EINVAL);
5145
5146	/ Get an io ref count if the interface is attached /
5147	if (!ifnet_is_attached(ifp, `1`))
5148	return (EOPNOTSUPP);
5149
5150	/*
5151	* Run the interface filters first.
5152	* We want to run all filters before calling the protocol,
5153	* interface family, or interface.
5154	*/
5155	lck_mtx_lock_spin(&ifp->if_flt_lock);
5156	/ prevent filter list from changing in case we drop the lock /
5157	if_flt_monitor_busy(ifp);
5158	TAILQ_FOREACH(filter, &ifp->if_flt_head, filt_next) {
5159	if (filter->filt_ioctl != NULL && (filter->filt_protocol == `0` \|\|
5160	filter->filt_protocol == proto_fam)) {
5161	lck_mtx_unlock(&ifp->if_flt_lock);
5162
5163	result = filter->filt_ioctl(filter->filt_cookie, ifp,
5164	proto_fam, ioctl_code, ioctl_arg);
5165
5166	lck_mtx_lock_spin(&ifp->if_flt_lock);
5167
5168	/ Only update retval if no one has handled the ioctl /
5169	if (retval == EOPNOTSUPP \|\| result == EJUSTRETURN) {
5170	if (result == ENOTSUP)
5171	result = EOPNOTSUPP;
5172	retval = result;
5173	if (retval != `0` && retval != EOPNOTSUPP) {
5174	/ we're done with the filter list /
5175	if_flt_monitor_unbusy(ifp);
5176	lck_mtx_unlock(&ifp->if_flt_lock);
5177	goto cleanup;
5178	}
5179	}
5180	}
5181	}
5182	/ we're done with the filter list /
5183	if_flt_monitor_unbusy(ifp);
5184	lck_mtx_unlock(&ifp->if_flt_lock);
5185
5186	/ Allow the protocol to handle the ioctl /
5187	if (proto_fam != `0`) {
5188	struct if_proto *proto;
5189
5190	/ callee holds a proto refcnt upon success /
5191	ifnet_lock_shared(ifp);
5192	proto = find_attached_proto(ifp, proto_fam);
5193	ifnet_lock_done(ifp);
5194	if (proto != NULL) {
5195	proto_media_ioctl ioctlp =
5196	(proto->proto_kpi == kProtoKPI_v1 ?
5197	proto->kpi.v1.ioctl : proto->kpi.v2.ioctl);
5198	result = EOPNOTSUPP;
5199	if (ioctlp != NULL)
5200	result = ioctlp(ifp, proto_fam, ioctl_code,
5201	ioctl_arg);
5202	if_proto_free(proto);
5203
5204	/ Only update retval if no one has handled the ioctl /
5205	if (retval == EOPNOTSUPP \|\| result == EJUSTRETURN) {
5206	if (result == ENOTSUP)
5207	result = EOPNOTSUPP;
5208	retval = result;
5209	if (retval && retval != EOPNOTSUPP)
5210	goto cleanup;
5211	}
5212	}
5213	}
5214
5215	/ retval is either 0 or EOPNOTSUPP /
5216
5217	/*
5218	* Let the interface handle this ioctl.
5219	* If it returns EOPNOTSUPP, ignore that, we may have
5220	* already handled this in the protocol or family.
5221	*/
5222	if (ifp->if_ioctl)
5223	result = (*ifp->if_ioctl)(ifp, ioctl_code, ioctl_arg);
5224
5225	/ Only update retval if no one has handled the ioctl /
5226	if (retval == EOPNOTSUPP \|\| result == EJUSTRETURN) {
5227	if (result == ENOTSUP)
5228	result = EOPNOTSUPP;
5229	retval = result;
5230	if (retval && retval != EOPNOTSUPP) {
5231	goto cleanup;
5232	}
5233	}
5234
5235	cleanup:
5236	if (retval == EJUSTRETURN)
5237	retval = `0`;
5238
5239	ifnet_decr_iorefcnt(ifp);
5240
5241	return (retval);
5242	}
5243
5244	__private_extern__ errno_t
5245	dlil_set_bpf_tap(ifnet_t ifp, bpf_tap_mode mode, bpf_packet_func callback)
5246	{
5247	errno_t error = `0`;
5248
5249
5250	if (ifp->if_set_bpf_tap) {
5251	/ Get an io reference on the interface if it is attached /
5252	if (!ifnet_is_attached(ifp, `1`))
5253	return (ENXIO);
5254	error = ifp->if_set_bpf_tap(ifp, mode, callback);
5255	ifnet_decr_iorefcnt(ifp);
5256	}
5257	return (error);
5258	}
5259
5260	errno_t
5261	dlil_resolve_multi(struct ifnet ifp, const* struct sockaddr *proto_addr,
5262	struct sockaddr *ll_addr, size_t ll_len)
5263	{
5264	errno_t result = EOPNOTSUPP;
5265	struct if_proto *proto;
5266	const struct sockaddr *verify;
5267	proto_media_resolve_multi resolvep;
5268
5269	if (!ifnet_is_attached(ifp, `1`))
5270	return (result);
5271
5272	bzero(ll_addr, ll_len);
5273
5274	/ Call the protocol first; callee holds a proto refcnt upon success /
5275	ifnet_lock_shared(ifp);
5276	proto = find_attached_proto(ifp, proto_addr->sa_family);
5277	ifnet_lock_done(ifp);
5278	if (proto != NULL) {
5279	resolvep = (proto->proto_kpi == kProtoKPI_v1 ?
5280	proto->kpi.v1.resolve_multi : proto->kpi.v2.resolve_multi);
5281	if (resolvep != NULL)
5282	result = resolvep(ifp, proto_addr,
5283	(struct sockaddr_dl )(void* *)ll_addr, ll_len);
5284	if_proto_free(proto);
5285	}
5286
5287	/ Let the interface verify the multicast address /
5288	if ((result == EOPNOTSUPP \|\| result == `0`) && ifp->if_check_multi) {
5289	if (result == `0`)
5290	verify = ll_addr;
5291	else
5292	verify = proto_addr;
5293	result = ifp->if_check_multi(ifp, verify);
5294	}
5295
5296	ifnet_decr_iorefcnt(ifp);
5297	return (result);
5298	}
5299
5300	__private_extern__ errno_t
5301	dlil_send_arp_internal(ifnet_t ifp, u_short arpop,
5302	const struct sockaddr_dl sender_hw, const* struct sockaddr *sender_proto,
5303	const struct sockaddr_dl target_hw, const* struct sockaddr *target_proto)
5304	{
5305	struct if_proto *proto;
5306	errno_t result = `0`;
5307
5308	/ callee holds a proto refcnt upon success /
5309	ifnet_lock_shared(ifp);
5310	proto = find_attached_proto(ifp, target_proto->sa_family);
5311	ifnet_lock_done(ifp);
5312	if (proto == NULL) {
5313	result = ENOTSUP;
5314	} else {
5315	proto_media_send_arp arpp;
5316	arpp = (proto->proto_kpi == kProtoKPI_v1 ?
5317	proto->kpi.v1.send_arp : proto->kpi.v2.send_arp);
5318	if (arpp == NULL) {
5319	result = ENOTSUP;
5320	} else {
5321	switch (arpop) {
5322	case ARPOP_REQUEST:
5323	arpstat.txrequests++;
5324	if (target_hw != NULL)
5325	arpstat.txurequests++;
5326	break;
5327	case ARPOP_REPLY:
5328	arpstat.txreplies++;
5329	break;
5330	}
5331	result = arpp(ifp, arpop, sender_hw, sender_proto,
5332	target_hw, target_proto);
5333	}
5334	if_proto_free(proto);
5335	}
5336
5337	return (result);
5338	}
5339
5340	struct net_thread_marks { };
5341	static const struct net_thread_marks net_thread_marks_base = { };
5342
5343	__private_extern__ const net_thread_marks_t net_thread_marks_none =
5344	&net_thread_marks_base;
5345
5346	__private_extern__ net_thread_marks_t
5347	net_thread_marks_push(u_int32_t push)
5348	{
5349	static const char *const base = (const void*)&net_thread_marks_base;
5350	u_int32_t pop = `0`;
5351
5352	if (push != `0`) {
5353	struct uthread *uth = get_bsdthread_info(current_thread());
5354
5355	pop = push & ~uth->uu_network_marks;
5356	if (pop != `0`)
5357	uth->uu_network_marks \|= pop;
5358	}
5359
5360	return ((net_thread_marks_t)&base[pop]);
5361	}
5362
5363	__private_extern__ net_thread_marks_t
5364	net_thread_unmarks_push(u_int32_t unpush)
5365	{
5366	static const char *const base = (const void*)&net_thread_marks_base;
5367	u_int32_t unpop = `0`;
5368
5369	if (unpush != `0`) {
5370	struct uthread *uth = get_bsdthread_info(current_thread());
5371
5372	unpop = unpush & uth->uu_network_marks;
5373	if (unpop != `0`)
5374	uth->uu_network_marks &= ~unpop;
5375	}
5376
5377	return ((net_thread_marks_t)&base[unpop]);
5378	}
5379
5380	__private_extern__ void
5381	net_thread_marks_pop(net_thread_marks_t popx)
5382	{
5383	static const char *const base = (const void*)&net_thread_marks_base;
5384	const ptrdiff_t pop = (const char )popx - (const* char *)base;
5385
5386	if (pop != `0`) {
5387	static const ptrdiff_t ones = (ptrdiff_t)(u_int32_t)~`0U`;
5388	struct uthread *uth = get_bsdthread_info(current_thread());
5389
5390	VERIFY((pop & ones) == pop);
5391	VERIFY((ptrdiff_t)(uth->uu_network_marks & pop) == pop);
5392	uth->uu_network_marks &= ~pop;
5393	}
5394	}
5395
5396	__private_extern__ void
5397	net_thread_unmarks_pop(net_thread_marks_t unpopx)
5398	{
5399	static const char *const base = (const void*)&net_thread_marks_base;
5400	ptrdiff_t unpop = (const char )unpopx - (const* char *)base;
5401
5402	if (unpop != `0`) {
5403	static const ptrdiff_t ones = (ptrdiff_t)(u_int32_t)~`0U`;
5404	struct uthread *uth = get_bsdthread_info(current_thread());
5405
5406	VERIFY((unpop & ones) == unpop);
5407	VERIFY((ptrdiff_t)(uth->uu_network_marks & unpop) == `0`);
5408	uth->uu_network_marks \|= unpop;
5409	}
5410	}
5411
5412	__private_extern__ u_int32_t
5413	net_thread_is_marked(u_int32_t check)
5414	{
5415	if (check != `0`) {
5416	struct uthread *uth = get_bsdthread_info(current_thread());
5417	return (uth->uu_network_marks & check);
5418	}
5419	else
5420	return (`0`);
5421	}
5422
5423	__private_extern__ u_int32_t
5424	net_thread_is_unmarked(u_int32_t check)
5425	{
5426	if (check != `0`) {
5427	struct uthread *uth = get_bsdthread_info(current_thread());
5428	return (~uth->uu_network_marks & check);
5429	}
5430	else
5431	return (`0`);
5432	}
5433
5434	static __inline__ int
5435	_is_announcement(const struct sockaddr_in * sender_sin,
5436	const struct sockaddr_in * target_sin)
5437	{
5438	if (sender_sin == NULL) {
5439	return (FALSE);
5440	}
5441	return (sender_sin->sin_addr.s_addr == target_sin->sin_addr.s_addr);
5442	}
5443
5444	__private_extern__ errno_t
5445	dlil_send_arp(ifnet_t ifp, u_short arpop, const struct sockaddr_dl *sender_hw,
5446	const struct sockaddr sender_proto, const* struct sockaddr_dl *target_hw,
5447	const struct sockaddr *target_proto0, u_int32_t rtflags)
5448	{
5449	errno_t result = `0`;
5450	const struct sockaddr_in * sender_sin;
5451	const struct sockaddr_in * target_sin;
5452	struct sockaddr_inarp target_proto_sinarp;
5453	struct sockaddr target_proto = (void* *)(uintptr_t)target_proto0;
5454
5455	if (target_proto == NULL \|\| (sender_proto != NULL &&
5456	sender_proto->sa_family != target_proto->sa_family))
5457	return (EINVAL);
5458
5459	/*
5460	* If the target is a (default) router, provide that
5461	* information to the send_arp callback routine.
5462	*/
5463	if (rtflags & RTF_ROUTER) {
5464	bcopy(target_proto, &target_proto_sinarp,
5465	sizeof (struct sockaddr_in));
5466	target_proto_sinarp.sin_other \|= SIN_ROUTER;
5467	target_proto = (struct sockaddr *)&target_proto_sinarp;
5468	}
5469
5470	/*
5471	* If this is an ARP request and the target IP is IPv4LL,
5472	* send the request on all interfaces. The exception is
5473	* an announcement, which must only appear on the specific
5474	* interface.
5475	*/
5476	sender_sin = (struct sockaddr_in )(void* *)(uintptr_t)sender_proto;
5477	target_sin = (struct sockaddr_in )(void* *)(uintptr_t)target_proto;
5478	if (target_proto->sa_family == AF_INET &&
5479	IN_LINKLOCAL(ntohl(target_sin->sin_addr.s_addr)) &&
5480	ipv4_ll_arp_aware != `0` && arpop == ARPOP_REQUEST &&
5481	!_is_announcement(target_sin, sender_sin)) {
5482	ifnet_t *ifp_list;
5483	u_int32_t count;
5484	u_int32_t ifp_on;
5485
5486	result = ENOTSUP;
5487
5488	if (ifnet_list_get(IFNET_FAMILY_ANY, &ifp_list, &count) == `0`) {
5489	for (ifp_on = `0`; ifp_on < count; ifp_on++) {
5490	errno_t new_result;
5491	ifaddr_t source_hw = NULL;
5492	ifaddr_t source_ip = NULL;
5493	struct sockaddr_in source_ip_copy;
5494	struct ifnet *cur_ifp = ifp_list[ifp_on];
5495
5496	/*
5497	* Only arp on interfaces marked for IPv4LL
5498	* ARPing. This may mean that we don't ARP on
5499	* the interface the subnet route points to.
5500	*/
5501	if (!(cur_ifp->if_eflags & IFEF_ARPLL))
5502	continue;
5503
5504	/ Find the source IP address /
5505	ifnet_lock_shared(cur_ifp);
5506	source_hw = cur_ifp->if_lladdr;
5507	TAILQ_FOREACH(source_ip, &cur_ifp->if_addrhead,
5508	ifa_link) {
5509	IFA_LOCK(source_ip);
5510	if (source_ip->ifa_addr != NULL &&
5511	source_ip->ifa_addr->sa_family ==
5512	AF_INET) {
5513	/ Copy the source IP address /
5514	source_ip_copy =
5515	(struct* sockaddr_in *)
5516	(void *)source_ip->ifa_addr;
5517	IFA_UNLOCK(source_ip);
5518	break;
5519	}
5520	IFA_UNLOCK(source_ip);
5521	}
5522
5523	/ No IP Source, don't arp /
5524	if (source_ip == NULL) {
5525	ifnet_lock_done(cur_ifp);
5526	continue;
5527	}
5528
5529	IFA_ADDREF(source_hw);
5530	ifnet_lock_done(cur_ifp);
5531
5532	/ Send the ARP /
5533	new_result = dlil_send_arp_internal(cur_ifp,
5534	arpop, (struct sockaddr_dl )(void* *)
5535	source_hw->ifa_addr,
5536	(struct sockaddr *)&source_ip_copy, NULL,
5537	target_proto);
5538
5539	IFA_REMREF(source_hw);
5540	if (result == ENOTSUP) {
5541	result = new_result;
5542	}
5543	}
5544	ifnet_list_free(ifp_list);
5545	}
5546	} else {
5547	result = dlil_send_arp_internal(ifp, arpop, sender_hw,
5548	sender_proto, target_hw, target_proto);
5549	}
5550
5551	return (result);
5552	}
5553
5554	/*
5555	* Caller must hold ifnet head lock.
5556	*/
5557	static int
5558	ifnet_lookup(struct ifnet *ifp)
5559	{
5560	struct ifnet *_ifp;
5561
5562	LCK_RW_ASSERT(&ifnet_head_lock, LCK_RW_ASSERT_HELD);
5563	TAILQ_FOREACH(_ifp, &ifnet_head, if_link) {
5564	if (_ifp == ifp)
5565	break;
5566	}
5567	return (_ifp != NULL);
5568	}
5569
5570	/*
5571	* Caller has to pass a non-zero refio argument to get a
5572	* IO reference count. This will prevent ifnet_detach from
5573	* being called when there are outstanding io reference counts.
5574	*/
5575	int
5576	ifnet_is_attached(struct ifnet ifp, int* refio)
5577	{
5578	int ret;
5579
5580	lck_mtx_lock_spin(&ifp->if_ref_lock);
5581	if ((ret = IF_FULLY_ATTACHED(ifp))) {
5582	if (refio > `0`)
5583	ifp->if_refio++;
5584	}
5585	lck_mtx_unlock(&ifp->if_ref_lock);
5586
5587	return (ret);
5588	}
5589
5590	/*
5591	* Caller must ensure the interface is attached; the assumption is that
5592	* there is at least an outstanding IO reference count held already.
5593	* Most callers would call ifnet_is_attached() instead.
5594	*/
5595	void
5596	ifnet_incr_iorefcnt(struct ifnet *ifp)
5597	{
5598	lck_mtx_lock_spin(&ifp->if_ref_lock);
5599	VERIFY(IF_FULLY_ATTACHED(ifp));
5600	VERIFY(ifp->if_refio > `0`);
5601	ifp->if_refio++;
5602	lck_mtx_unlock(&ifp->if_ref_lock);
5603	}
5604
5605	void
5606	ifnet_decr_iorefcnt(struct ifnet *ifp)
5607	{
5608	lck_mtx_lock_spin(&ifp->if_ref_lock);
5609	VERIFY(ifp->if_refio > `0`);
5610	VERIFY(ifp->if_refflags & (IFRF_ATTACHED \| IFRF_DETACHING));
5611	ifp->if_refio--;
5612
5613	/*
5614	* if there are no more outstanding io references, wakeup the
5615	* ifnet_detach thread if detaching flag is set.
5616	*/
5617	if (ifp->if_refio == `0` && (ifp->if_refflags & IFRF_DETACHING))
5618	wakeup(&(ifp->if_refio));
5619
5620	lck_mtx_unlock(&ifp->if_ref_lock);
5621	}
5622
5623	static void
5624	dlil_if_trace(struct dlil_ifnet dl_if, int* refhold)
5625	{
5626	struct dlil_ifnet_dbg dl_if_dbg = (struct* dlil_ifnet_dbg *)dl_if;
5627	ctrace_t *tr;
5628	u_int32_t idx;
5629	u_int16_t *cnt;
5630
5631	if (!(dl_if->dl_if_flags & DLIF_DEBUG)) {
5632	panic("%s: dl_if %p has no debug structure", __func__, dl_if);
5633	/ NOTREACHED /
5634	}
5635
5636	if (refhold) {
5637	cnt = &dl_if_dbg->dldbg_if_refhold_cnt;
5638	tr = dl_if_dbg->dldbg_if_refhold;
5639	} else {
5640	cnt = &dl_if_dbg->dldbg_if_refrele_cnt;
5641	tr = dl_if_dbg->dldbg_if_refrele;
5642	}
5643
5644	idx = atomic_add_16_ov(cnt, `1`) % IF_REF_TRACE_HIST_SIZE;
5645	ctrace_record(&tr[idx]);
5646	}
5647
5648	errno_t
5649	dlil_if_ref(struct ifnet *ifp)
5650	{
5651	struct dlil_ifnet dl_if = (struct* dlil_ifnet *)ifp;
5652
5653	if (dl_if == NULL)
5654	return (EINVAL);
5655
5656	lck_mtx_lock_spin(&dl_if->dl_if_lock);
5657	++dl_if->dl_if_refcnt;
5658	if (dl_if->dl_if_refcnt == `0`) {
5659	panic("%s: wraparound refcnt for ifp=%p", __func__, ifp);
5660	/ NOTREACHED /
5661	}
5662	if (dl_if->dl_if_trace != NULL)
5663	(*dl_if->dl_if_trace)(dl_if, TRUE);
5664	lck_mtx_unlock(&dl_if->dl_if_lock);
5665
5666	return (`0`);
5667	}
5668
5669	errno_t
5670	dlil_if_free(struct ifnet *ifp)
5671	{
5672	struct dlil_ifnet dl_if = (struct* dlil_ifnet *)ifp;
5673	bool need_release = FALSE;
5674
5675	if (dl_if == NULL)
5676	return (EINVAL);
5677
5678	lck_mtx_lock_spin(&dl_if->dl_if_lock);
5679	switch (dl_if->dl_if_refcnt) {
5680	case `0`:
5681	panic("%s: negative refcnt for ifp=%p", __func__, ifp);
5682	/ NOTREACHED /
5683	break;
5684	case `1`:
5685	if ((ifp->if_refflags & IFRF_EMBRYONIC) != `0`) {
5686	need_release = TRUE;
5687	}
5688	break;
5689	default:
5690	break;
5691	}
5692	--dl_if->dl_if_refcnt;
5693	if (dl_if->dl_if_trace != NULL)
5694	(*dl_if->dl_if_trace)(dl_if, FALSE);
5695	lck_mtx_unlock(&dl_if->dl_if_lock);
5696	if (need_release) {
5697	dlil_if_release(ifp);
5698	}
5699	return (`0`);
5700	}
5701
5702	static errno_t
5703	dlil_attach_protocol_internal(struct if_proto *proto,
5704	const struct ifnet_demux_desc *demux_list, u_int32_t demux_count,
5705	uint32_t * proto_count)
5706	{
5707	struct kev_dl_proto_data ev_pr_data;
5708	struct ifnet *ifp = proto->ifp;
5709	int retval = `0`;
5710	u_int32_t hash_value = proto_hash_value(proto->protocol_family);
5711	struct if_proto *prev_proto;
5712	struct if_proto *_proto;
5713
5714	/ callee holds a proto refcnt upon success /
5715	ifnet_lock_exclusive(ifp);
5716	_proto = find_attached_proto(ifp, proto->protocol_family);
5717	if (_proto != NULL) {
5718	ifnet_lock_done(ifp);
5719	if_proto_free(_proto);
5720	return (EEXIST);
5721	}
5722
5723	/*
5724	* Call family module add_proto routine so it can refine the
5725	* demux descriptors as it wishes.
5726	*/
5727	retval = ifp->if_add_proto(ifp, proto->protocol_family, demux_list,
5728	demux_count);
5729	if (retval) {
5730	ifnet_lock_done(ifp);
5731	return (retval);
5732	}
5733
5734	/*
5735	* Insert the protocol in the hash
5736	*/
5737	prev_proto = SLIST_FIRST(&ifp->if_proto_hash[hash_value]);
5738	while (prev_proto != NULL && SLIST_NEXT(prev_proto, next_hash) != NULL)
5739	prev_proto = SLIST_NEXT(prev_proto, next_hash);
5740	if (prev_proto)
5741	SLIST_INSERT_AFTER(prev_proto, proto, next_hash);
5742	else
5743	SLIST_INSERT_HEAD(&ifp->if_proto_hash[hash_value],
5744	proto, next_hash);
5745
5746	/ hold a proto refcnt for attach /
5747	if_proto_ref(proto);
5748
5749	/*
5750	* The reserved field carries the number of protocol still attached
5751	* (subject to change)
5752	*/
5753	ev_pr_data.proto_family = proto->protocol_family;
5754	ev_pr_data.proto_remaining_count = dlil_ifp_protolist(ifp, NULL, `0`);
5755
5756	ifnet_lock_done(ifp);
5757
5758	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_PROTO_ATTACHED,
5759	(struct net_event_data *)&ev_pr_data,
5760	sizeof (struct kev_dl_proto_data));
5761	if (proto_count != NULL) {
5762	*proto_count = ev_pr_data.proto_remaining_count;
5763	}
5764	return (retval);
5765	}
5766
5767	errno_t
5768	ifnet_attach_protocol(ifnet_t ifp, protocol_family_t protocol,
5769	const struct ifnet_attach_proto_param *proto_details)
5770	{
5771	int retval = `0`;
5772	struct if_proto *ifproto = NULL;
5773	uint32_t proto_count = `0`;
5774
5775	ifnet_head_lock_shared();
5776	if (ifp == NULL \|\| protocol == `0` \|\| proto_details == NULL) {
5777	retval = EINVAL;
5778	goto end;
5779	}
5780	/ Check that the interface is in the global list /
5781	if (!ifnet_lookup(ifp)) {
5782	retval = ENXIO;
5783	goto end;
5784	}
5785
5786	ifproto = zalloc(dlif_proto_zone);
5787	if (ifproto == NULL) {
5788	retval = ENOMEM;
5789	goto end;
5790	}
5791	bzero(ifproto, dlif_proto_size);
5792
5793	/ refcnt held above during lookup /
5794	ifproto->ifp = ifp;
5795	ifproto->protocol_family = protocol;
5796	ifproto->proto_kpi = kProtoKPI_v1;
5797	ifproto->kpi.v1.input = proto_details->input;
5798	ifproto->kpi.v1.pre_output = proto_details->pre_output;
5799	ifproto->kpi.v1.event = proto_details->event;
5800	ifproto->kpi.v1.ioctl = proto_details->ioctl;
5801	ifproto->kpi.v1.detached = proto_details->detached;
5802	ifproto->kpi.v1.resolve_multi = proto_details->resolve;
5803	ifproto->kpi.v1.send_arp = proto_details->send_arp;
5804
5805	retval = dlil_attach_protocol_internal(ifproto,
5806	proto_details->demux_list, proto_details->demux_count,
5807	&proto_count);
5808
5809	end:
5810	if (retval != `0` && retval != EEXIST && ifp != NULL) {
5811	DLIL_PRINTF("%s: failed to attach v1 protocol %d (err=%d)\n",
5812	if_name(ifp), protocol, retval);
5813	} else {
5814	if (dlil_verbose) {
5815	printf("%s: attached v1 protocol %d (count = %d)\n",
5816	if_name(ifp),
5817	protocol, proto_count);
5818	}
5819	}
5820	ifnet_head_done();
5821	if (retval == `0`) {
5822	/*
5823	* A protocol has been attached, mark the interface up.
5824	* This used to be done by configd.KernelEventMonitor, but that
5825	* is inherently prone to races (rdar://problem/30810208).
5826	*/
5827	(void) ifnet_set_flags(ifp, IFF_UP, IFF_UP);
5828	(void) ifnet_ioctl(ifp, `0`, SIOCSIFFLAGS, NULL);
5829	dlil_post_sifflags_msg(ifp);
5830	} else if (ifproto != NULL) {
5831	zfree(dlif_proto_zone, ifproto);
5832	}
5833	return (retval);
5834	}
5835
5836	errno_t
5837	ifnet_attach_protocol_v2(ifnet_t ifp, protocol_family_t protocol,
5838	const struct ifnet_attach_proto_param_v2 *proto_details)
5839	{
5840	int retval = `0`;
5841	struct if_proto *ifproto = NULL;
5842	uint32_t proto_count = `0`;
5843
5844	ifnet_head_lock_shared();
5845	if (ifp == NULL \|\| protocol == `0` \|\| proto_details == NULL) {
5846	retval = EINVAL;
5847	goto end;
5848	}
5849	/ Check that the interface is in the global list /
5850	if (!ifnet_lookup(ifp)) {
5851	retval = ENXIO;
5852	goto end;
5853	}
5854
5855	ifproto = zalloc(dlif_proto_zone);
5856	if (ifproto == NULL) {
5857	retval = ENOMEM;
5858	goto end;
5859	}
5860	bzero(ifproto, sizeof(*ifproto));
5861
5862	/ refcnt held above during lookup /
5863	ifproto->ifp = ifp;
5864	ifproto->protocol_family = protocol;
5865	ifproto->proto_kpi = kProtoKPI_v2;
5866	ifproto->kpi.v2.input = proto_details->input;
5867	ifproto->kpi.v2.pre_output = proto_details->pre_output;
5868	ifproto->kpi.v2.event = proto_details->event;
5869	ifproto->kpi.v2.ioctl = proto_details->ioctl;
5870	ifproto->kpi.v2.detached = proto_details->detached;
5871	ifproto->kpi.v2.resolve_multi = proto_details->resolve;
5872	ifproto->kpi.v2.send_arp = proto_details->send_arp;
5873
5874	retval = dlil_attach_protocol_internal(ifproto,
5875	proto_details->demux_list, proto_details->demux_count,
5876	&proto_count);
5877
5878	end:
5879	if (retval != `0` && retval != EEXIST && ifp != NULL) {
5880	DLIL_PRINTF("%s: failed to attach v2 protocol %d (err=%d)\n",
5881	if_name(ifp), protocol, retval);
5882	} else {
5883	if (dlil_verbose) {
5884	printf("%s: attached v2 protocol %d (count = %d)\n",
5885	if_name(ifp),
5886	protocol, proto_count);
5887	}
5888	}
5889	ifnet_head_done();
5890	if (retval == `0`) {
5891	/*
5892	* A protocol has been attached, mark the interface up.
5893	* This used to be done by configd.KernelEventMonitor, but that
5894	* is inherently prone to races (rdar://problem/30810208).
5895	*/
5896	(void) ifnet_set_flags(ifp, IFF_UP, IFF_UP);
5897	(void) ifnet_ioctl(ifp, `0`, SIOCSIFFLAGS, NULL);
5898	dlil_post_sifflags_msg(ifp);
5899	} else if (ifproto != NULL) {
5900	zfree(dlif_proto_zone, ifproto);
5901	}
5902	return (retval);
5903	}
5904
5905	errno_t
5906	ifnet_detach_protocol(ifnet_t ifp, protocol_family_t proto_family)
5907	{
5908	struct if_proto *proto = NULL;
5909	int retval = `0`;
5910
5911	if (ifp == NULL \|\| proto_family == `0`) {
5912	retval = EINVAL;
5913	goto end;
5914	}
5915
5916	ifnet_lock_exclusive(ifp);
5917	/ callee holds a proto refcnt upon success /
5918	proto = find_attached_proto(ifp, proto_family);
5919	if (proto == NULL) {
5920	retval = ENXIO;
5921	ifnet_lock_done(ifp);
5922	goto end;
5923	}
5924
5925	/ call family module del_proto /
5926	if (ifp->if_del_proto)
5927	ifp->if_del_proto(ifp, proto->protocol_family);
5928
5929	SLIST_REMOVE(&ifp->if_proto_hash[proto_hash_value(proto_family)],
5930	proto, if_proto, next_hash);
5931
5932	if (proto->proto_kpi == kProtoKPI_v1) {
5933	proto->kpi.v1.input = ifproto_media_input_v1;
5934	proto->kpi.v1.pre_output = ifproto_media_preout;
5935	proto->kpi.v1.event = ifproto_media_event;
5936	proto->kpi.v1.ioctl = ifproto_media_ioctl;
5937	proto->kpi.v1.resolve_multi = ifproto_media_resolve_multi;
5938	proto->kpi.v1.send_arp = ifproto_media_send_arp;
5939	} else {
5940	proto->kpi.v2.input = ifproto_media_input_v2;
5941	proto->kpi.v2.pre_output = ifproto_media_preout;
5942	proto->kpi.v2.event = ifproto_media_event;
5943	proto->kpi.v2.ioctl = ifproto_media_ioctl;
5944	proto->kpi.v2.resolve_multi = ifproto_media_resolve_multi;
5945	proto->kpi.v2.send_arp = ifproto_media_send_arp;
5946	}
5947	proto->detached = `1`;
5948	ifnet_lock_done(ifp);
5949
5950	if (dlil_verbose) {
5951	printf("%s: detached %s protocol %d\n", if_name(ifp),
5952	(proto->proto_kpi == kProtoKPI_v1) ?
5953	"v1" : "v2", proto_family);
5954	}
5955
5956	/ release proto refcnt held during protocol attach /
5957	if_proto_free(proto);
5958
5959	/*
5960	* Release proto refcnt held during lookup; the rest of
5961	* protocol detach steps will happen when the last proto
5962	* reference is released.
5963	*/
5964	if_proto_free(proto);
5965
5966	end:
5967	return (retval);
5968	}
5969
5970
5971	static errno_t
5972	ifproto_media_input_v1(struct ifnet *ifp, protocol_family_t protocol,
5973	struct mbuf packet, char* *header)
5974	{
5975	#pragma unused(ifp, protocol, packet, header)
5976	return (ENXIO);
5977	}
5978
5979	static errno_t
5980	ifproto_media_input_v2(struct ifnet *ifp, protocol_family_t protocol,
5981	struct mbuf *packet)
5982	{
5983	#pragma unused(ifp, protocol, packet)
5984	return (ENXIO);
5985
5986	}
5987
5988	static errno_t
5989	ifproto_media_preout(struct ifnet *ifp, protocol_family_t protocol,
5990	mbuf_t packet, const* struct sockaddr dest, void* route, char* *frame_type,
5991	char *link_layer_dest)
5992	{
5993	#pragma unused(ifp, protocol, packet, dest, route, frame_type, link_layer_dest)
5994	return (ENXIO);
5995
5996	}
5997
5998	static void
5999	ifproto_media_event(struct ifnet *ifp, protocol_family_t protocol,
6000	const struct kev_msg *event)
6001	{
6002	#pragma unused(ifp, protocol, event)
6003	}
6004
6005	static errno_t
6006	ifproto_media_ioctl(struct ifnet *ifp, protocol_family_t protocol,
6007	unsigned long command, void *argument)
6008	{
6009	#pragma unused(ifp, protocol, command, argument)
6010	return (ENXIO);
6011	}
6012
6013	static errno_t
6014	ifproto_media_resolve_multi(ifnet_t ifp, const struct sockaddr *proto_addr,
6015	struct sockaddr_dl *out_ll, size_t ll_len)
6016	{
6017	#pragma unused(ifp, proto_addr, out_ll, ll_len)
6018	return (ENXIO);
6019	}
6020
6021	static errno_t
6022	ifproto_media_send_arp(struct ifnet *ifp, u_short arpop,
6023	const struct sockaddr_dl sender_hw, const* struct sockaddr *sender_proto,
6024	const struct sockaddr_dl target_hw, const* struct sockaddr *target_proto)
6025	{
6026	#pragma unused(ifp, arpop, sender_hw, sender_proto, target_hw, target_proto)
6027	return (ENXIO);
6028	}
6029
6030	extern int if_next_index(void);
6031	extern int tcp_ecn_outbound;
6032
6033	errno_t
6034	ifnet_attach(ifnet_t ifp, const struct sockaddr_dl *ll_addr)
6035	{
6036	struct ifnet *tmp_if;
6037	struct ifaddr *ifa;
6038	struct if_data_internal if_data_saved;
6039	struct dlil_ifnet dl_if = (struct* dlil_ifnet *)ifp;
6040	struct dlil_threading_info *dl_inp;
6041	u_int32_t sflags = `0`;
6042	int err;
6043
6044	if (ifp == NULL)
6045	return (EINVAL);
6046
6047	/*
6048	* Serialize ifnet attach using dlil_ifnet_lock, in order to
6049	* prevent the interface from being configured while it is
6050	* embryonic, as ifnet_head_lock is dropped and reacquired
6051	* below prior to marking the ifnet with IFRF_ATTACHED.
6052	*/
6053	dlil_if_lock();
6054	ifnet_head_lock_exclusive();
6055	/ Verify we aren't already on the list /
6056	TAILQ_FOREACH(tmp_if, &ifnet_head, if_link) {
6057	if (tmp_if == ifp) {
6058	ifnet_head_done();
6059	dlil_if_unlock();
6060	return (EEXIST);
6061	}
6062	}
6063
6064	lck_mtx_lock_spin(&ifp->if_ref_lock);
6065	if (!(ifp->if_refflags & IFRF_EMBRYONIC)) {
6066	panic_plain("%s: flags mismatch (embryonic not set) ifp=%p",
6067	__func__, ifp);
6068	/ NOTREACHED /
6069	}
6070	lck_mtx_unlock(&ifp->if_ref_lock);
6071
6072	ifnet_lock_exclusive(ifp);
6073
6074	/ Sanity check /
6075	VERIFY(ifp->if_detaching_link.tqe_next == NULL);
6076	VERIFY(ifp->if_detaching_link.tqe_prev == NULL);
6077
6078	if (ll_addr != NULL) {
6079	if (ifp->if_addrlen == `0`) {
6080	ifp->if_addrlen = ll_addr->sdl_alen;
6081	} else if (ll_addr->sdl_alen != ifp->if_addrlen) {
6082	ifnet_lock_done(ifp);
6083	ifnet_head_done();
6084	dlil_if_unlock();
6085	return (EINVAL);
6086	}
6087	}
6088
6089	/*
6090	* Allow interfaces without protocol families to attach
6091	* only if they have the necessary fields filled out.
6092	*/
6093	if (ifp->if_add_proto == NULL \|\| ifp->if_del_proto == NULL) {
6094	DLIL_PRINTF("%s: Attempt to attach interface without "
6095	"family module - %d\n", __func__, ifp->if_family);
6096	ifnet_lock_done(ifp);
6097	ifnet_head_done();
6098	dlil_if_unlock();
6099	return (ENODEV);
6100	}
6101
6102	/ Allocate protocol hash table /
6103	VERIFY(ifp->if_proto_hash == NULL);
6104	ifp->if_proto_hash = zalloc(dlif_phash_zone);
6105	if (ifp->if_proto_hash == NULL) {
6106	ifnet_lock_done(ifp);
6107	ifnet_head_done();
6108	dlil_if_unlock();
6109	return (ENOBUFS);
6110	}
6111	bzero(ifp->if_proto_hash, dlif_phash_size);
6112
6113	lck_mtx_lock_spin(&ifp->if_flt_lock);
6114	VERIFY(TAILQ_EMPTY(&ifp->if_flt_head));
6115	TAILQ_INIT(&ifp->if_flt_head);
6116	VERIFY(ifp->if_flt_busy == `0`);
6117	VERIFY(ifp->if_flt_waiters == `0`);
6118	lck_mtx_unlock(&ifp->if_flt_lock);
6119
6120	if (!(dl_if->dl_if_flags & DLIF_REUSE)) {
6121	VERIFY(LIST_EMPTY(&ifp->if_multiaddrs));
6122	LIST_INIT(&ifp->if_multiaddrs);
6123	}
6124
6125	VERIFY(ifp->if_allhostsinm == NULL);
6126	VERIFY(TAILQ_EMPTY(&ifp->if_addrhead));
6127	TAILQ_INIT(&ifp->if_addrhead);
6128
6129	if (ifp->if_index == `0`) {
6130	int idx = if_next_index();
6131
6132	if (idx == -`1`) {
6133	ifp->if_index = `0`;
6134	ifnet_lock_done(ifp);
6135	ifnet_head_done();
6136	dlil_if_unlock();
6137	return (ENOBUFS);
6138	}
6139	ifp->if_index = idx;
6140	}
6141	/ There should not be anything occupying this slot /
6142	VERIFY(ifindex2ifnet[ifp->if_index] == NULL);
6143
6144	/ allocate (if needed) and initialize a link address /
6145	ifa = dlil_alloc_lladdr(ifp, ll_addr);
6146	if (ifa == NULL) {
6147	ifnet_lock_done(ifp);
6148	ifnet_head_done();
6149	dlil_if_unlock();
6150	return (ENOBUFS);
6151	}
6152
6153	VERIFY(ifnet_addrs[ifp->if_index - `1`] == NULL);
6154	ifnet_addrs[ifp->if_index - `1`] = ifa;
6155
6156	/ make this address the first on the list /
6157	IFA_LOCK(ifa);
6158	/ hold a reference for ifnet_addrs[] /
6159	IFA_ADDREF_LOCKED(ifa);
6160	/ if_attach_link_ifa() holds a reference for ifa_link /
6161	if_attach_link_ifa(ifp, ifa);
6162	IFA_UNLOCK(ifa);
6163
6164	#if CONFIG_MACF_NET
6165	mac_ifnet_label_associate(ifp);
6166	#endif
6167
6168	TAILQ_INSERT_TAIL(&ifnet_head, ifp, if_link);
6169	ifindex2ifnet[ifp->if_index] = ifp;
6170
6171	/ Hold a reference to the underlying dlil_ifnet /
6172	ifnet_reference(ifp);
6173
6174	/ Clear stats (save and restore other fields that we care) /
6175	if_data_saved = ifp->if_data;
6176	bzero(&ifp->if_data, sizeof (ifp->if_data));
6177	ifp->if_data.ifi_type = if_data_saved.ifi_type;
6178	ifp->if_data.ifi_typelen = if_data_saved.ifi_typelen;
6179	ifp->if_data.ifi_physical = if_data_saved.ifi_physical;
6180	ifp->if_data.ifi_addrlen = if_data_saved.ifi_addrlen;
6181	ifp->if_data.ifi_hdrlen = if_data_saved.ifi_hdrlen;
6182	ifp->if_data.ifi_mtu = if_data_saved.ifi_mtu;
6183	ifp->if_data.ifi_baudrate = if_data_saved.ifi_baudrate;
6184	ifp->if_data.ifi_hwassist = if_data_saved.ifi_hwassist;
6185	ifp->if_data.ifi_tso_v4_mtu = if_data_saved.ifi_tso_v4_mtu;
6186	ifp->if_data.ifi_tso_v6_mtu = if_data_saved.ifi_tso_v6_mtu;
6187	ifnet_touch_lastchange(ifp);
6188
6189	VERIFY(ifp->if_output_sched_model == IFNET_SCHED_MODEL_NORMAL \|\|
6190	ifp->if_output_sched_model == IFNET_SCHED_MODEL_DRIVER_MANAGED \|\|
6191	ifp->if_output_sched_model == IFNET_SCHED_MODEL_FQ_CODEL);
6192
6193	/ By default, use SFB and enable flow advisory /
6194	sflags = PKTSCHEDF_QALG_SFB;
6195	if (if_flowadv)
6196	sflags \|= PKTSCHEDF_QALG_FLOWCTL;
6197
6198	if (if_delaybased_queue)
6199	sflags \|= PKTSCHEDF_QALG_DELAYBASED;
6200
6201	if (ifp->if_output_sched_model ==
6202	IFNET_SCHED_MODEL_DRIVER_MANAGED)
6203	sflags \|= PKTSCHEDF_QALG_DRIVER_MANAGED;
6204
6205	/ Initialize transmit queue(s) /
6206	err = ifclassq_setup(ifp, sflags, (dl_if->dl_if_flags & DLIF_REUSE));
6207	if (err != `0`) {
6208	panic_plain("%s: ifp=%p couldn't initialize transmit queue; "
6209	"err=%d", __func__, ifp, err);
6210	/ NOTREACHED /
6211	}
6212
6213	/ Sanity checks on the input thread storage /
6214	dl_inp = &dl_if->dl_if_inpstorage;
6215	bzero(&dl_inp->stats, sizeof (dl_inp->stats));
6216	VERIFY(dl_inp->input_waiting == `0`);
6217	VERIFY(dl_inp->wtot == `0`);
6218	VERIFY(dl_inp->ifp == NULL);
6219	VERIFY(qhead(&dl_inp->rcvq_pkts) == NULL && qempty(&dl_inp->rcvq_pkts));
6220	VERIFY(qlimit(&dl_inp->rcvq_pkts) == `0`);
6221	VERIFY(!dl_inp->net_affinity);
6222	VERIFY(ifp->if_inp == NULL);
6223	VERIFY(dl_inp->input_thr == THREAD_NULL);
6224	VERIFY(dl_inp->wloop_thr == THREAD_NULL);
6225	VERIFY(dl_inp->poll_thr == THREAD_NULL);
6226	VERIFY(dl_inp->tag == `0`);
6227	VERIFY(dl_inp->mode == IFNET_MODEL_INPUT_POLL_OFF);
6228	bzero(&dl_inp->tstats, sizeof (dl_inp->tstats));
6229	bzero(&dl_inp->pstats, sizeof (dl_inp->pstats));
6230	bzero(&dl_inp->sstats, sizeof (dl_inp->sstats));
6231	#if IFNET_INPUT_SANITY_CHK
6232	VERIFY(dl_inp->input_mbuf_cnt == `0`);
6233	#endif /* IFNET_INPUT_SANITY_CHK */
6234
6235	/*
6236	* A specific DLIL input thread is created per Ethernet/cellular
6237	* interface or for an interface which supports opportunistic
6238	* input polling. Pseudo interfaces or other types of interfaces
6239	* use the main input thread instead.
6240	*/
6241	if ((net_rxpoll && (ifp->if_eflags & IFEF_RXPOLL)) \|\|
6242	ifp->if_type == IFT_ETHER \|\| ifp->if_type == IFT_CELLULAR) {
6243	ifp->if_inp = dl_inp;
6244	err = dlil_create_input_thread(ifp, ifp->if_inp);
6245	if (err != `0`) {
6246	panic_plain("%s: ifp=%p couldn't get an input thread; "
6247	"err=%d", __func__, ifp, err);
6248	/ NOTREACHED /
6249	}
6250	}
6251
6252	if (ifp->if_inp != NULL && ifp->if_inp->input_mit_tcall == NULL) {
6253	ifp->if_inp->input_mit_tcall =
6254	thread_call_allocate_with_priority(dlil_mit_tcall_fn,
6255	ifp, THREAD_CALL_PRIORITY_KERNEL);
6256	}
6257
6258	/*
6259	* If the driver supports the new transmit model, calculate flow hash
6260	* and create a workloop starter thread to invoke the if_start callback
6261	* where the packets may be dequeued and transmitted.
6262	*/
6263	if (ifp->if_eflags & IFEF_TXSTART) {
6264	ifp->if_flowhash = ifnet_calc_flowhash(ifp);
6265	VERIFY(ifp->if_flowhash != `0`);
6266	VERIFY(ifp->if_start_thread == THREAD_NULL);
6267
6268	ifnet_set_start_cycle(ifp, NULL);
6269	ifp->if_start_active = `0`;
6270	ifp->if_start_req = `0`;
6271	ifp->if_start_flags = `0`;
6272	VERIFY(ifp->if_start != NULL);
6273	if ((err = kernel_thread_start(ifnet_start_thread_fn,
6274	ifp, &ifp->if_start_thread)) != KERN_SUCCESS) {
6275	panic_plain("%s: "
6276	"ifp=%p couldn't get a start thread; "
6277	"err=%d", __func__, ifp, err);
6278	/ NOTREACHED /
6279	}
6280	ml_thread_policy(ifp->if_start_thread, MACHINE_GROUP,
6281	(MACHINE_NETWORK_GROUP\|MACHINE_NETWORK_WORKLOOP));
6282	} else {
6283	ifp->if_flowhash = `0`;
6284	}
6285
6286	/*
6287	* If the driver supports the new receive model, create a poller
6288	* thread to invoke if_input_poll callback where the packets may
6289	* be dequeued from the driver and processed for reception.
6290	*/
6291	if (ifp->if_eflags & IFEF_RXPOLL) {
6292	VERIFY(ifp->if_input_poll != NULL);
6293	VERIFY(ifp->if_input_ctl != NULL);
6294	VERIFY(ifp->if_poll_thread == THREAD_NULL);
6295
6296	ifnet_set_poll_cycle(ifp, NULL);
6297	ifp->if_poll_update = `0`;
6298	ifp->if_poll_active = `0`;
6299	ifp->if_poll_req = `0`;
6300	if ((err = kernel_thread_start(ifnet_poll_thread_fn, ifp,
6301	&ifp->if_poll_thread)) != KERN_SUCCESS) {
6302	panic_plain("%s: ifp=%p couldn't get a poll thread; "
6303	"err=%d", __func__, ifp, err);
6304	/ NOTREACHED /
6305	}
6306	ml_thread_policy(ifp->if_poll_thread, MACHINE_GROUP,
6307	(MACHINE_NETWORK_GROUP\|MACHINE_NETWORK_WORKLOOP));
6308	}
6309
6310	VERIFY(ifp->if_desc.ifd_maxlen == IF_DESCSIZE);
6311	VERIFY(ifp->if_desc.ifd_len == `0`);
6312	VERIFY(ifp->if_desc.ifd_desc != NULL);
6313
6314	/ Record attach PC stacktrace /
6315	ctrace_record(&((struct dlil_ifnet *)ifp)->dl_if_attach);
6316
6317	ifp->if_updatemcasts = `0`;
6318	if (!LIST_EMPTY(&ifp->if_multiaddrs)) {
6319	struct ifmultiaddr *ifma;
6320	LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
6321	IFMA_LOCK(ifma);
6322	if (ifma->ifma_addr->sa_family == AF_LINK \|\|
6323	ifma->ifma_addr->sa_family == AF_UNSPEC)
6324	ifp->if_updatemcasts++;
6325	IFMA_UNLOCK(ifma);
6326	}
6327
6328	printf("%s: attached with %d suspended link-layer multicast "
6329	"membership(s)\n", if_name(ifp),
6330	ifp->if_updatemcasts);
6331	}
6332
6333	/ Clear logging parameters /
6334	bzero(&ifp->if_log, sizeof (ifp->if_log));
6335
6336	/ Clear foreground/realtime activity timestamps /
6337	ifp->if_fg_sendts = `0`;
6338	ifp->if_rt_sendts = `0`;
6339
6340	VERIFY(ifp->if_delegated.ifp == NULL);
6341	VERIFY(ifp->if_delegated.type == `0`);
6342	VERIFY(ifp->if_delegated.family == `0`);
6343	VERIFY(ifp->if_delegated.subfamily == `0`);
6344	VERIFY(ifp->if_delegated.expensive == `0`);
6345
6346	VERIFY(ifp->if_agentids == NULL);
6347	VERIFY(ifp->if_agentcount == `0`);
6348
6349	/ Reset interface state /
6350	bzero(&ifp->if_interface_state, sizeof(ifp->if_interface_state));
6351	ifp->if_interface_state.valid_bitmask \|=
6352	IF_INTERFACE_STATE_INTERFACE_AVAILABILITY_VALID;
6353	ifp->if_interface_state.interface_availability =
6354	IF_INTERFACE_STATE_INTERFACE_AVAILABLE;
6355
6356	/ Initialize Link Quality Metric (loopback [lo0] is always good) /
6357	if (ifp == lo_ifp) {
6358	ifp->if_interface_state.lqm_state = IFNET_LQM_THRESH_GOOD;
6359	ifp->if_interface_state.valid_bitmask \|=
6360	IF_INTERFACE_STATE_LQM_STATE_VALID;
6361	} else {
6362	ifp->if_interface_state.lqm_state = IFNET_LQM_THRESH_UNKNOWN;
6363	}
6364
6365	/*
6366	* Enable ECN capability on this interface depending on the
6367	* value of ECN global setting
6368	*/
6369	if (tcp_ecn_outbound == `2` && !IFNET_IS_CELLULAR(ifp)) {
6370	ifp->if_eflags \|= IFEF_ECN_ENABLE;
6371	ifp->if_eflags &= ~IFEF_ECN_DISABLE;
6372	}
6373
6374	/*
6375	* Built-in Cyclops always on policy for WiFi infra
6376	*/
6377	if (IFNET_IS_WIFI_INFRA(ifp) && net_qos_policy_wifi_enabled != `0`) {
6378	errno_t error;
6379
6380	error = if_set_qosmarking_mode(ifp,
6381	IFRTYPE_QOSMARKING_FASTLANE);
6382	if (error != `0`) {
6383	printf("%s if_set_qosmarking_mode(%s) error %d\n",
6384	__func__, ifp->if_xname, error);
6385	} else {
6386	ifp->if_eflags \|= IFEF_QOSMARKING_ENABLED;
6387	#if (DEVELOPMENT \|\| DEBUG)
6388	printf("%s fastlane enabled on %s\n",
6389	__func__, ifp->if_xname);
6390	#endif /* (DEVELOPMENT \|\| DEBUG) */
6391	}
6392	}
6393
6394	ifnet_lock_done(ifp);
6395	ifnet_head_done();
6396
6397
6398	lck_mtx_lock(&ifp->if_cached_route_lock);
6399	/ Enable forwarding cached route /
6400	ifp->if_fwd_cacheok = `1`;
6401	/ Clean up any existing cached routes /
6402	ROUTE_RELEASE(&ifp->if_fwd_route);
6403	bzero(&ifp->if_fwd_route, sizeof (ifp->if_fwd_route));
6404	ROUTE_RELEASE(&ifp->if_src_route);
6405	bzero(&ifp->if_src_route, sizeof (ifp->if_src_route));
6406	ROUTE_RELEASE(&ifp->if_src_route6);
6407	bzero(&ifp->if_src_route6, sizeof (ifp->if_src_route6));
6408	lck_mtx_unlock(&ifp->if_cached_route_lock);
6409
6410	ifnet_llreach_ifattach(ifp, (dl_if->dl_if_flags & DLIF_REUSE));
6411
6412	/*
6413	* Allocate and attach IGMPv3/MLDv2 interface specific variables
6414	* and trees; do this before the ifnet is marked as attached.
6415	* The ifnet keeps the reference to the info structures even after
6416	* the ifnet is detached, since the network-layer records still
6417	* refer to the info structures even after that. This also
6418	* makes it possible for them to still function after the ifnet
6419	* is recycled or reattached.
6420	*/
6421	#if INET
6422	if (IGMP_IFINFO(ifp) == NULL) {
6423	IGMP_IFINFO(ifp) = igmp_domifattach(ifp, M_WAITOK);
6424	VERIFY(IGMP_IFINFO(ifp) != NULL);
6425	} else {
6426	VERIFY(IGMP_IFINFO(ifp)->igi_ifp == ifp);
6427	igmp_domifreattach(IGMP_IFINFO(ifp));
6428	}
6429	#endif /* INET */
6430	#if INET6
6431	if (MLD_IFINFO(ifp) == NULL) {
6432	MLD_IFINFO(ifp) = mld_domifattach(ifp, M_WAITOK);
6433	VERIFY(MLD_IFINFO(ifp) != NULL);
6434	} else {
6435	VERIFY(MLD_IFINFO(ifp)->mli_ifp == ifp);
6436	mld_domifreattach(MLD_IFINFO(ifp));
6437	}
6438	#endif /* INET6 */
6439
6440	VERIFY(ifp->if_data_threshold == `0`);
6441	VERIFY(ifp->if_dt_tcall != NULL);
6442
6443	/*
6444	* Finally, mark this ifnet as attached.
6445	*/
6446	lck_mtx_lock(rnh_lock);
6447	ifnet_lock_exclusive(ifp);
6448	lck_mtx_lock_spin(&ifp->if_ref_lock);
6449	ifp->if_refflags = IFRF_ATTACHED; / clears embryonic /
6450	lck_mtx_unlock(&ifp->if_ref_lock);
6451	if (net_rtref) {
6452	/ boot-args override; enable idle notification /
6453	(void) ifnet_set_idle_flags_locked(ifp, IFRF_IDLE_NOTIFY,
6454	IFRF_IDLE_NOTIFY);
6455	} else {
6456	/ apply previous request(s) to set the idle flags, if any /
6457	(void) ifnet_set_idle_flags_locked(ifp, ifp->if_idle_new_flags,
6458	ifp->if_idle_new_flags_mask);
6459
6460	}
6461	ifnet_lock_done(ifp);
6462	lck_mtx_unlock(rnh_lock);
6463	dlil_if_unlock();
6464
6465	#if PF
6466	/*
6467	* Attach packet filter to this interface, if enabled.
6468	*/
6469	pf_ifnet_hook(ifp, `1`);
6470	#endif /* PF */
6471
6472	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_IF_ATTACHED, NULL, `0`);
6473
6474	if (dlil_verbose) {
6475	printf("%s: attached%s\n", if_name(ifp),
6476	(dl_if->dl_if_flags & DLIF_REUSE) ? " (recycled)" : "");
6477	}
6478
6479	return (`0`);
6480	}
6481
6482	/*
6483	* Prepare the storage for the first/permanent link address, which must
6484	* must have the same lifetime as the ifnet itself. Although the link
6485	* address gets removed from if_addrhead and ifnet_addrs[] at detach time,
6486	* its location in memory must never change as it may still be referred
6487	* to by some parts of the system afterwards (unfortunate implementation
6488	* artifacts inherited from BSD.)
6489	*
6490	* Caller must hold ifnet lock as writer.
6491	*/
6492	static struct ifaddr *
6493	dlil_alloc_lladdr(struct ifnet ifp, const* struct sockaddr_dl *ll_addr)
6494	{
6495	struct ifaddr ifa, oifa;
6496	struct sockaddr_dl asdl, msdl;
6497	char workbuf[IFNAMSIZ*`2`];
6498	int namelen, masklen, socksize;
6499	struct dlil_ifnet dl_if = (struct* dlil_ifnet *)ifp;
6500
6501	ifnet_lock_assert(ifp, IFNET_LCK_ASSERT_EXCLUSIVE);
6502	VERIFY(ll_addr == NULL \|\| ll_addr->sdl_alen == ifp->if_addrlen);
6503
6504	namelen = snprintf(workbuf, sizeof (workbuf), "%s",
6505	if_name(ifp));
6506	masklen = offsetof(struct sockaddr_dl, sdl_data[`0`])
6507	+ ((namelen > `0`) ? namelen : `0`);
6508	socksize = masklen + ifp->if_addrlen;
6509	#define ROUNDUP(a) (1 + (((a) - 1) \| (sizeof (u_int32_t) - 1)))
6510	if ((u_int32_t)socksize < sizeof (struct sockaddr_dl))
6511	socksize = sizeof(struct sockaddr_dl);
6512	socksize = ROUNDUP(socksize);
6513	#undef ROUNDUP
6514
6515	ifa = ifp->if_lladdr;
6516	if (socksize > DLIL_SDLMAXLEN \|\|
6517	(ifa != NULL && ifa != &dl_if->dl_if_lladdr.ifa)) {
6518	/*
6519	* Rare, but in the event that the link address requires
6520	* more storage space than DLIL_SDLMAXLEN, allocate the
6521	* largest possible storages for address and mask, such
6522	* that we can reuse the same space when if_addrlen grows.
6523	* This same space will be used when if_addrlen shrinks.
6524	*/
6525	if (ifa == NULL \|\| ifa == &dl_if->dl_if_lladdr.ifa) {
6526	int ifasize = sizeof (ifa) + `2` SOCK_MAXADDRLEN;
6527	ifa = _MALLOC(ifasize, M_IFADDR, M_WAITOK \| M_ZERO);
6528	if (ifa == NULL)
6529	return (NULL);
6530	ifa_lock_init(ifa);
6531	/ Don't set IFD_ALLOC, as this is permanent /
6532	ifa->ifa_debug = IFD_LINK;
6533	}
6534	IFA_LOCK(ifa);
6535	/ address and mask sockaddr_dl locations /
6536	asdl = (struct sockaddr_dl *)(ifa + `1`);
6537	bzero(asdl, SOCK_MAXADDRLEN);
6538	msdl = (struct sockaddr_dl )(void* *)
6539	((char *)asdl + SOCK_MAXADDRLEN);
6540	bzero(msdl, SOCK_MAXADDRLEN);
6541	} else {
6542	VERIFY(ifa == NULL \|\| ifa == &dl_if->dl_if_lladdr.ifa);
6543	/*
6544	* Use the storage areas for address and mask within the
6545	* dlil_ifnet structure. This is the most common case.
6546	*/
6547	if (ifa == NULL) {
6548	ifa = &dl_if->dl_if_lladdr.ifa;
6549	ifa_lock_init(ifa);
6550	/ Don't set IFD_ALLOC, as this is permanent /
6551	ifa->ifa_debug = IFD_LINK;
6552	}
6553	IFA_LOCK(ifa);
6554	/ address and mask sockaddr_dl locations /
6555	asdl = (struct sockaddr_dl )(void* *)&dl_if->dl_if_lladdr.asdl;
6556	bzero(asdl, sizeof (dl_if->dl_if_lladdr.asdl));
6557	msdl = (struct sockaddr_dl )(void* *)&dl_if->dl_if_lladdr.msdl;
6558	bzero(msdl, sizeof (dl_if->dl_if_lladdr.msdl));
6559	}
6560
6561	/ hold a permanent reference for the ifnet itself /
6562	IFA_ADDREF_LOCKED(ifa);
6563	oifa = ifp->if_lladdr;
6564	ifp->if_lladdr = ifa;
6565
6566	VERIFY(ifa->ifa_debug == IFD_LINK);
6567	ifa->ifa_ifp = ifp;
6568	ifa->ifa_rtrequest = link_rtrequest;
6569	ifa->ifa_addr = (struct sockaddr *)asdl;
6570	asdl->sdl_len = socksize;
6571	asdl->sdl_family = AF_LINK;
6572	if (namelen > `0`) {
6573	bcopy(workbuf, asdl->sdl_data, min(namelen,
6574	sizeof (asdl->sdl_data)));
6575	asdl->sdl_nlen = namelen;
6576	} else {
6577	asdl->sdl_nlen = `0`;
6578	}
6579	asdl->sdl_index = ifp->if_index;
6580	asdl->sdl_type = ifp->if_type;
6581	if (ll_addr != NULL) {
6582	asdl->sdl_alen = ll_addr->sdl_alen;
6583	bcopy(CONST_LLADDR(ll_addr), LLADDR(asdl), asdl->sdl_alen);
6584	} else {
6585	asdl->sdl_alen = `0`;
6586	}
6587	ifa->ifa_netmask = (struct sockaddr *)msdl;
6588	msdl->sdl_len = masklen;
6589	while (namelen > `0`)
6590	msdl->sdl_data[--namelen] = `0xff`;
6591	IFA_UNLOCK(ifa);
6592
6593	if (oifa != NULL)
6594	IFA_REMREF(oifa);
6595
6596	return (ifa);
6597	}
6598
6599	static void
6600	if_purgeaddrs(struct ifnet *ifp)
6601	{
6602	#if INET
6603	in_purgeaddrs(ifp);
6604	#endif /* INET */
6605	#if INET6
6606	in6_purgeaddrs(ifp);
6607	#endif /* INET6 */
6608	}
6609
6610	errno_t
6611	ifnet_detach(ifnet_t ifp)
6612	{
6613	struct ifnet *delegated_ifp;
6614	struct nd_ifinfo *ndi = NULL;
6615
6616	if (ifp == NULL)
6617	return (EINVAL);
6618
6619	ndi = ND_IFINFO(ifp);
6620	if (NULL != ndi)
6621	ndi->cga_initialized = FALSE;
6622
6623	lck_mtx_lock(rnh_lock);
6624	ifnet_head_lock_exclusive();
6625	ifnet_lock_exclusive(ifp);
6626
6627	/*
6628	* Check to see if this interface has previously triggered
6629	* aggressive protocol draining; if so, decrement the global
6630	* refcnt and clear PR_AGGDRAIN on the route domain if
6631	* there are no more of such an interface around.
6632	*/
6633	(void) ifnet_set_idle_flags_locked(ifp, `0`, ~`0`);
6634
6635	lck_mtx_lock_spin(&ifp->if_ref_lock);
6636	if (!(ifp->if_refflags & IFRF_ATTACHED)) {
6637	lck_mtx_unlock(&ifp->if_ref_lock);
6638	ifnet_lock_done(ifp);
6639	ifnet_head_done();
6640	lck_mtx_unlock(rnh_lock);
6641	return (EINVAL);
6642	} else if (ifp->if_refflags & IFRF_DETACHING) {
6643	/ Interface has already been detached /
6644	lck_mtx_unlock(&ifp->if_ref_lock);
6645	ifnet_lock_done(ifp);
6646	ifnet_head_done();
6647	lck_mtx_unlock(rnh_lock);
6648	return (ENXIO);
6649	}
6650	VERIFY(!(ifp->if_refflags & IFRF_EMBRYONIC));
6651	/ Indicate this interface is being detached /
6652	ifp->if_refflags &= ~IFRF_ATTACHED;
6653	ifp->if_refflags \|= IFRF_DETACHING;
6654	lck_mtx_unlock(&ifp->if_ref_lock);
6655
6656	if (dlil_verbose) {
6657	printf("%s: detaching\n", if_name(ifp));
6658	}
6659
6660	/ clean up flow control entry object if there's any /
6661	if (ifp->if_eflags & IFEF_TXSTART) {
6662	ifnet_flowadv(ifp->if_flowhash);
6663	}
6664
6665	/ Reset ECN enable/disable flags /
6666	ifp->if_eflags &= ~IFEF_ECN_DISABLE;
6667	ifp->if_eflags &= ~IFEF_ECN_ENABLE;
6668
6669	/ Reset CLAT46 flag /
6670	ifp->if_eflags &= ~IFEF_CLAT46;
6671
6672	/*
6673	* Remove ifnet from the ifnet_head, ifindex2ifnet[]; it will
6674	* no longer be visible during lookups from this point.
6675	*/
6676	VERIFY(ifindex2ifnet[ifp->if_index] == ifp);
6677	TAILQ_REMOVE(&ifnet_head, ifp, if_link);
6678	ifp->if_link.tqe_next = NULL;
6679	ifp->if_link.tqe_prev = NULL;
6680	if (ifp->if_ordered_link.tqe_next != NULL \|\|
6681	ifp->if_ordered_link.tqe_prev != NULL) {
6682	ifnet_remove_from_ordered_list(ifp);
6683	}
6684	ifindex2ifnet[ifp->if_index] = NULL;
6685
6686	/ 18717626 - reset IFEF_IPV4_ROUTER and IFEF_IPV6_ROUTER /
6687	ifp->if_eflags &= ~(IFEF_IPV4_ROUTER \| IFEF_IPV6_ROUTER);
6688
6689	/ Record detach PC stacktrace /
6690	ctrace_record(&((struct dlil_ifnet *)ifp)->dl_if_detach);
6691
6692	/ Clear logging parameters /
6693	bzero(&ifp->if_log, sizeof (ifp->if_log));
6694
6695	/ Clear delegated interface info (reference released below) /
6696	delegated_ifp = ifp->if_delegated.ifp;
6697	bzero(&ifp->if_delegated, sizeof (ifp->if_delegated));
6698
6699	/ Reset interface state /
6700	bzero(&ifp->if_interface_state, sizeof(ifp->if_interface_state));
6701
6702	ifnet_lock_done(ifp);
6703	ifnet_head_done();
6704	lck_mtx_unlock(rnh_lock);
6705
6706
6707	/ Release reference held on the delegated interface /
6708	if (delegated_ifp != NULL)
6709	ifnet_release(delegated_ifp);
6710
6711	/ Reset Link Quality Metric (unless loopback [lo0]) /
6712	if (ifp != lo_ifp)
6713	if_lqm_update(ifp, IFNET_LQM_THRESH_OFF, `0`);
6714
6715	/ Reset TCP local statistics /
6716	if (ifp->if_tcp_stat != NULL)
6717	bzero(ifp->if_tcp_stat, sizeof(*ifp->if_tcp_stat));
6718
6719	/ Reset UDP local statistics /
6720	if (ifp->if_udp_stat != NULL)
6721	bzero(ifp->if_udp_stat, sizeof(*ifp->if_udp_stat));
6722
6723	/ Reset ifnet IPv4 stats /
6724	if (ifp->if_ipv4_stat != NULL)
6725	bzero(ifp->if_ipv4_stat, sizeof(*ifp->if_ipv4_stat));
6726
6727	/ Reset ifnet IPv6 stats /
6728	if (ifp->if_ipv6_stat != NULL)
6729	bzero(ifp->if_ipv6_stat, sizeof(*ifp->if_ipv6_stat));
6730
6731	/ Release memory held for interface link status report /
6732	if (ifp->if_link_status != NULL) {
6733	FREE(ifp->if_link_status, M_TEMP);
6734	ifp->if_link_status = NULL;
6735	}
6736
6737	/ Clear agent IDs /
6738	if (ifp->if_agentids != NULL) {
6739	FREE(ifp->if_agentids, M_NETAGENT);
6740	ifp->if_agentids = NULL;
6741	}
6742	ifp->if_agentcount = `0`;
6743
6744
6745	/ Let BPF know we're detaching /
6746	bpfdetach(ifp);
6747
6748	/ Mark the interface as DOWN /
6749	if_down(ifp);
6750
6751	/ Disable forwarding cached route /
6752	lck_mtx_lock(&ifp->if_cached_route_lock);
6753	ifp->if_fwd_cacheok = `0`;
6754	lck_mtx_unlock(&ifp->if_cached_route_lock);
6755
6756	/ Disable data threshold and wait for any pending event posting /
6757	ifp->if_data_threshold = `0`;
6758	VERIFY(ifp->if_dt_tcall != NULL);
6759	(void) thread_call_cancel_wait(ifp->if_dt_tcall);
6760
6761	/*
6762	* Drain any deferred IGMPv3/MLDv2 query responses, but keep the
6763	* references to the info structures and leave them attached to
6764	* this ifnet.
6765	*/
6766	#if INET
6767	igmp_domifdetach(ifp);
6768	#endif /* INET */
6769	#if INET6
6770	mld_domifdetach(ifp);
6771	#endif /* INET6 */
6772
6773	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_IF_DETACHING, NULL, `0`);
6774
6775	/ Let worker thread take care of the rest, to avoid reentrancy /
6776	dlil_if_lock();
6777	ifnet_detaching_enqueue(ifp);
6778	dlil_if_unlock();
6779
6780	return (`0`);
6781	}
6782
6783	static void
6784	ifnet_detaching_enqueue(struct ifnet *ifp)
6785	{
6786	dlil_if_lock_assert();
6787
6788	++ifnet_detaching_cnt;
6789	VERIFY(ifnet_detaching_cnt != `0`);
6790	TAILQ_INSERT_TAIL(&ifnet_detaching_head, ifp, if_detaching_link);
6791	wakeup((caddr_t)&ifnet_delayed_run);
6792	}
6793
6794	static struct ifnet *
6795	ifnet_detaching_dequeue(void)
6796	{
6797	struct ifnet *ifp;
6798
6799	dlil_if_lock_assert();
6800
6801	ifp = TAILQ_FIRST(&ifnet_detaching_head);
6802	VERIFY(ifnet_detaching_cnt != `0` \|\| ifp == NULL);
6803	if (ifp != NULL) {
6804	VERIFY(ifnet_detaching_cnt != `0`);
6805	--ifnet_detaching_cnt;
6806	TAILQ_REMOVE(&ifnet_detaching_head, ifp, if_detaching_link);
6807	ifp->if_detaching_link.tqe_next = NULL;
6808	ifp->if_detaching_link.tqe_prev = NULL;
6809	}
6810	return (ifp);
6811	}
6812
6813	static int
6814	ifnet_detacher_thread_cont(int err)
6815	{
6816	#pragma unused(err)
6817	struct ifnet *ifp;
6818
6819	for (;;) {
6820	dlil_if_lock_assert();
6821	while (ifnet_detaching_cnt == `0`) {
6822	(void) msleep0(&ifnet_delayed_run, &dlil_ifnet_lock,
6823	(PZERO - `1`), "ifnet_detacher_cont", `0`,
6824	ifnet_detacher_thread_cont);
6825	/ NOTREACHED /
6826	}
6827
6828	VERIFY(TAILQ_FIRST(&ifnet_detaching_head) != NULL);
6829
6830	/ Take care of detaching ifnet /
6831	ifp = ifnet_detaching_dequeue();
6832	if (ifp != NULL) {
6833	dlil_if_unlock();
6834	ifnet_detach_final(ifp);
6835	dlil_if_lock();
6836	}
6837	}
6838	}
6839
6840	static void
6841	ifnet_detacher_thread_func(void *v, wait_result_t w)
6842	{
6843	#pragma unused(v, w)
6844	dlil_if_lock();
6845	(void) msleep0(&ifnet_delayed_run, &dlil_ifnet_lock,
6846	(PZERO - `1`), "ifnet_detacher", `0`, ifnet_detacher_thread_cont);
6847	/*
6848	* msleep0() shouldn't have returned as PCATCH was not set;
6849	* therefore assert in this case.
6850	*/
6851	dlil_if_unlock();
6852	VERIFY(`0`);
6853	}
6854
6855	static void
6856	ifnet_detach_final(struct ifnet *ifp)
6857	{
6858	struct ifnet_filter filter, filter_next;
6859	struct ifnet_filter_head fhead;
6860	struct dlil_threading_info *inp;
6861	struct ifaddr *ifa;
6862	ifnet_detached_func if_free;
6863	int i;
6864
6865	lck_mtx_lock(&ifp->if_ref_lock);
6866	if (!(ifp->if_refflags & IFRF_DETACHING)) {
6867	panic("%s: flags mismatch (detaching not set) ifp=%p",
6868	__func__, ifp);
6869	/ NOTREACHED /
6870	}
6871
6872	/*
6873	* Wait until the existing IO references get released
6874	* before we proceed with ifnet_detach. This is not a
6875	* common case, so block without using a continuation.
6876	*/
6877	while (ifp->if_refio > `0`) {
6878	printf("%s: Waiting for IO references on %s interface "
6879	"to be released\n", __func__, if_name(ifp));
6880	(void) msleep(&(ifp->if_refio), &ifp->if_ref_lock,
6881	(PZERO - `1`), "ifnet_ioref_wait", NULL);
6882	}
6883	lck_mtx_unlock(&ifp->if_ref_lock);
6884
6885	/ Drain and destroy send queue /
6886	ifclassq_teardown(ifp);
6887
6888	/ Detach interface filters /
6889	lck_mtx_lock(&ifp->if_flt_lock);
6890	if_flt_monitor_enter(ifp);
6891
6892	LCK_MTX_ASSERT(&ifp->if_flt_lock, LCK_MTX_ASSERT_OWNED);
6893	fhead = ifp->if_flt_head;
6894	TAILQ_INIT(&ifp->if_flt_head);
6895
6896	for (filter = TAILQ_FIRST(&fhead); filter; filter = filter_next) {
6897	filter_next = TAILQ_NEXT(filter, filt_next);
6898	lck_mtx_unlock(&ifp->if_flt_lock);
6899
6900	dlil_detach_filter_internal(filter, `1`);
6901	lck_mtx_lock(&ifp->if_flt_lock);
6902	}
6903	if_flt_monitor_leave(ifp);
6904	lck_mtx_unlock(&ifp->if_flt_lock);
6905
6906	/ Tell upper layers to drop their network addresses /
6907	if_purgeaddrs(ifp);
6908
6909	ifnet_lock_exclusive(ifp);
6910
6911	/ Uplumb all protocols /
6912	for (i = `0`; i < PROTO_HASH_SLOTS; i++) {
6913	struct if_proto *proto;
6914
6915	proto = SLIST_FIRST(&ifp->if_proto_hash[i]);
6916	while (proto != NULL) {
6917	protocol_family_t family = proto->protocol_family;
6918	ifnet_lock_done(ifp);
6919	proto_unplumb(family, ifp);
6920	ifnet_lock_exclusive(ifp);
6921	proto = SLIST_FIRST(&ifp->if_proto_hash[i]);
6922	}
6923	/ There should not be any protocols left /
6924	VERIFY(SLIST_EMPTY(&ifp->if_proto_hash[i]));
6925	}
6926	zfree(dlif_phash_zone, ifp->if_proto_hash);
6927	ifp->if_proto_hash = NULL;
6928
6929	/ Detach (permanent) link address from if_addrhead /
6930	ifa = TAILQ_FIRST(&ifp->if_addrhead);
6931	VERIFY(ifnet_addrs[ifp->if_index - `1`] == ifa);
6932	IFA_LOCK(ifa);
6933	if_detach_link_ifa(ifp, ifa);
6934	IFA_UNLOCK(ifa);
6935
6936	/ Remove (permanent) link address from ifnet_addrs[] /
6937	IFA_REMREF(ifa);
6938	ifnet_addrs[ifp->if_index - `1`] = NULL;
6939
6940	/ This interface should not be on {ifnet_head,detaching} /
6941	VERIFY(ifp->if_link.tqe_next == NULL);
6942	VERIFY(ifp->if_link.tqe_prev == NULL);
6943	VERIFY(ifp->if_detaching_link.tqe_next == NULL);
6944	VERIFY(ifp->if_detaching_link.tqe_prev == NULL);
6945	VERIFY(ifp->if_ordered_link.tqe_next == NULL);
6946	VERIFY(ifp->if_ordered_link.tqe_prev == NULL);
6947
6948	/ The slot should have been emptied /
6949	VERIFY(ifindex2ifnet[ifp->if_index] == NULL);
6950
6951	/ There should not be any addresses left /
6952	VERIFY(TAILQ_EMPTY(&ifp->if_addrhead));
6953
6954	/*
6955	* Signal the starter thread to terminate itself.
6956	*/
6957	if (ifp->if_start_thread != THREAD_NULL) {
6958	lck_mtx_lock_spin(&ifp->if_start_lock);
6959	ifp->if_start_flags = `0`;
6960	ifp->if_start_thread = THREAD_NULL;
6961	wakeup_one((caddr_t)&ifp->if_start_thread);
6962	lck_mtx_unlock(&ifp->if_start_lock);
6963	}
6964
6965	/*
6966	* Signal the poller thread to terminate itself.
6967	*/
6968	if (ifp->if_poll_thread != THREAD_NULL) {
6969	lck_mtx_lock_spin(&ifp->if_poll_lock);
6970	ifp->if_poll_thread = THREAD_NULL;
6971	wakeup_one((caddr_t)&ifp->if_poll_thread);
6972	lck_mtx_unlock(&ifp->if_poll_lock);
6973	}
6974
6975	/*
6976	* If thread affinity was set for the workloop thread, we will need
6977	* to tear down the affinity and release the extra reference count
6978	* taken at attach time. Does not apply to lo0 or other interfaces
6979	* without dedicated input threads.
6980	*/
6981	if ((inp = ifp->if_inp) != NULL) {
6982	VERIFY(inp != dlil_main_input_thread);
6983
6984	if (inp->net_affinity) {
6985	struct thread tp, wtp, *ptp;
6986
6987	lck_mtx_lock_spin(&inp->input_lck);
6988	wtp = inp->wloop_thr;
6989	inp->wloop_thr = THREAD_NULL;
6990	ptp = inp->poll_thr;
6991	inp->poll_thr = THREAD_NULL;
6992	tp = inp->input_thr; / don't nullify now /
6993	inp->tag = `0`;
6994	inp->net_affinity = FALSE;
6995	lck_mtx_unlock(&inp->input_lck);
6996
6997	/ Tear down poll thread affinity /
6998	if (ptp != NULL) {
6999	VERIFY(ifp->if_eflags & IFEF_RXPOLL);
7000	(void) dlil_affinity_set(ptp,
7001	THREAD_AFFINITY_TAG_NULL);
7002	thread_deallocate(ptp);
7003	}
7004
7005	/ Tear down workloop thread affinity /
7006	if (wtp != NULL) {
7007	(void) dlil_affinity_set(wtp,
7008	THREAD_AFFINITY_TAG_NULL);
7009	thread_deallocate(wtp);
7010	}
7011
7012	/ Tear down DLIL input thread affinity /
7013	(void) dlil_affinity_set(tp, THREAD_AFFINITY_TAG_NULL);
7014	thread_deallocate(tp);
7015	}
7016
7017	/ disassociate ifp DLIL input thread /
7018	ifp->if_inp = NULL;
7019
7020	/ tell the input thread to terminate /
7021	lck_mtx_lock_spin(&inp->input_lck);
7022	inp->input_waiting \|= DLIL_INPUT_TERMINATE;
7023	if (!(inp->input_waiting & DLIL_INPUT_RUNNING)) {
7024	wakeup_one((caddr_t)&inp->input_waiting);
7025	}
7026	lck_mtx_unlock(&inp->input_lck);
7027	ifnet_lock_done(ifp);
7028
7029	/ wait for the input thread to terminate /
7030	lck_mtx_lock_spin(&inp->input_lck);
7031	while ((inp->input_waiting & DLIL_INPUT_TERMINATE_COMPLETE)
7032	== `0`) {
7033	(void) msleep(&inp->input_waiting, &inp->input_lck,
7034	(PZERO - `1`) \| PSPIN, inp->input_name, NULL);
7035	}
7036	lck_mtx_unlock(&inp->input_lck);
7037	ifnet_lock_exclusive(ifp);
7038
7039	/ clean-up input thread state /
7040	dlil_clean_threading_info(inp);
7041
7042	}
7043
7044	/ The driver might unload, so point these to ourselves /
7045	if_free = ifp->if_free;
7046	ifp->if_output_dlil = ifp_if_output;
7047	ifp->if_output = ifp_if_output;
7048	ifp->if_pre_enqueue = ifp_if_output;
7049	ifp->if_start = ifp_if_start;
7050	ifp->if_output_ctl = ifp_if_ctl;
7051	ifp->if_input_dlil = ifp_if_input;
7052	ifp->if_input_poll = ifp_if_input_poll;
7053	ifp->if_input_ctl = ifp_if_ctl;
7054	ifp->if_ioctl = ifp_if_ioctl;
7055	ifp->if_set_bpf_tap = ifp_if_set_bpf_tap;
7056	ifp->if_free = ifp_if_free;
7057	ifp->if_demux = ifp_if_demux;
7058	ifp->if_event = ifp_if_event;
7059	ifp->if_framer_legacy = ifp_if_framer;
7060	ifp->if_framer = ifp_if_framer_extended;
7061	ifp->if_add_proto = ifp_if_add_proto;
7062	ifp->if_del_proto = ifp_if_del_proto;
7063	ifp->if_check_multi = ifp_if_check_multi;
7064
7065	/ wipe out interface description /
7066	VERIFY(ifp->if_desc.ifd_maxlen == IF_DESCSIZE);
7067	ifp->if_desc.ifd_len = `0`;
7068	VERIFY(ifp->if_desc.ifd_desc != NULL);
7069	bzero(ifp->if_desc.ifd_desc, IF_DESCSIZE);
7070
7071	/ there shouldn't be any delegation by now /
7072	VERIFY(ifp->if_delegated.ifp == NULL);
7073	VERIFY(ifp->if_delegated.type == `0`);
7074	VERIFY(ifp->if_delegated.family == `0`);
7075	VERIFY(ifp->if_delegated.subfamily == `0`);
7076	VERIFY(ifp->if_delegated.expensive == `0`);
7077
7078	/ QoS marking get cleared /
7079	ifp->if_eflags &= ~IFEF_QOSMARKING_ENABLED;
7080	if_set_qosmarking_mode(ifp, IFRTYPE_QOSMARKING_MODE_NONE);
7081
7082
7083	ifnet_lock_done(ifp);
7084
7085	#if PF
7086	/*
7087	* Detach this interface from packet filter, if enabled.
7088	*/
7089	pf_ifnet_hook(ifp, `0`);
7090	#endif /* PF */
7091
7092	/ Filter list should be empty /
7093	lck_mtx_lock_spin(&ifp->if_flt_lock);
7094	VERIFY(TAILQ_EMPTY(&ifp->if_flt_head));
7095	VERIFY(ifp->if_flt_busy == `0`);
7096	VERIFY(ifp->if_flt_waiters == `0`);
7097	lck_mtx_unlock(&ifp->if_flt_lock);
7098
7099	/ Last chance to drain send queue /
7100	if_qflush(ifp, `0`);
7101
7102	/ Last chance to cleanup any cached route /
7103	lck_mtx_lock(&ifp->if_cached_route_lock);
7104	VERIFY(!ifp->if_fwd_cacheok);
7105	ROUTE_RELEASE(&ifp->if_fwd_route);
7106	bzero(&ifp->if_fwd_route, sizeof (ifp->if_fwd_route));
7107	ROUTE_RELEASE(&ifp->if_src_route);
7108	bzero(&ifp->if_src_route, sizeof (ifp->if_src_route));
7109	ROUTE_RELEASE(&ifp->if_src_route6);
7110	bzero(&ifp->if_src_route6, sizeof (ifp->if_src_route6));
7111	lck_mtx_unlock(&ifp->if_cached_route_lock);
7112
7113	VERIFY(ifp->if_data_threshold == `0`);
7114	VERIFY(ifp->if_dt_tcall != NULL);
7115	VERIFY(!thread_call_isactive(ifp->if_dt_tcall));
7116
7117	ifnet_llreach_ifdetach(ifp);
7118
7119	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_IF_DETACHED, NULL, `0`);
7120
7121	/*
7122	* Finally, mark this ifnet as detached.
7123	*/
7124	lck_mtx_lock_spin(&ifp->if_ref_lock);
7125	if (!(ifp->if_refflags & IFRF_DETACHING)) {
7126	panic("%s: flags mismatch (detaching not set) ifp=%p",
7127	__func__, ifp);
7128	/ NOTREACHED /
7129	}
7130	ifp->if_refflags &= ~IFRF_DETACHING;
7131	lck_mtx_unlock(&ifp->if_ref_lock);
7132	if (if_free != NULL)
7133	if_free(ifp);
7134
7135	if (dlil_verbose)
7136	printf("%s: detached\n", if_name(ifp));
7137
7138	/ Release reference held during ifnet attach /
7139	ifnet_release(ifp);
7140	}
7141
7142	errno_t
7143	ifp_if_output(struct ifnet ifp, struct* mbuf *m)
7144	{
7145	#pragma unused(ifp)
7146	m_freem_list(m);
7147	return (`0`);
7148	}
7149
7150	void
7151	ifp_if_start(struct ifnet *ifp)
7152	{
7153	ifnet_purge(ifp);
7154	}
7155
7156	static errno_t
7157	ifp_if_input(struct ifnet ifp, struct* mbuf *m_head,
7158	struct mbuf m_tail, const* struct ifnet_stat_increment_param *s,
7159	boolean_t poll, struct thread *tp)
7160	{
7161	#pragma unused(ifp, m_tail, s, poll, tp)
7162	m_freem_list(m_head);
7163	return (ENXIO);
7164	}
7165
7166	static void
7167	ifp_if_input_poll(struct ifnet *ifp, u_int32_t flags, u_int32_t max_cnt,
7168	struct mbuf m_head, struct mbuf m_tail, u_int32_t cnt, u_int32_t len)
7169	{
7170	#pragma unused(ifp, flags, max_cnt)
7171	if (m_head != NULL)
7172	*m_head = NULL;
7173	if (m_tail != NULL)
7174	*m_tail = NULL;
7175	if (cnt != NULL)
7176	*cnt = `0`;
7177	if (len != NULL)
7178	*len = `0`;
7179	}
7180
7181	static errno_t
7182	ifp_if_ctl(struct ifnet ifp, ifnet_ctl_cmd_t cmd, u_int32_t arglen, void* *arg)
7183	{
7184	#pragma unused(ifp, cmd, arglen, arg)
7185	return (EOPNOTSUPP);
7186	}
7187
7188	static errno_t
7189	ifp_if_demux(struct ifnet ifp, struct* mbuf m, char* fh, protocol_family_t pf)
7190	{
7191	#pragma unused(ifp, fh, pf)
7192	m_freem(m);
7193	return (EJUSTRETURN);
7194	}
7195
7196	static errno_t
7197	ifp_if_add_proto(struct ifnet *ifp, protocol_family_t pf,
7198	const struct ifnet_demux_desc *da, u_int32_t dc)
7199	{
7200	#pragma unused(ifp, pf, da, dc)
7201	return (EINVAL);
7202	}
7203
7204	static errno_t
7205	ifp_if_del_proto(struct ifnet *ifp, protocol_family_t pf)
7206	{
7207	#pragma unused(ifp, pf)
7208	return (EINVAL);
7209	}
7210
7211	static errno_t
7212	ifp_if_check_multi(struct ifnet ifp, const* struct sockaddr *sa)
7213	{
7214	#pragma unused(ifp, sa)
7215	return (EOPNOTSUPP);
7216	}
7217
7218	#if CONFIG_EMBEDDED
7219	static errno_t
7220	ifp_if_framer(struct ifnet ifp, struct* mbuf **m,
7221	const struct sockaddr sa, const* char ll, const* char *t,
7222	u_int32_t pre, u_int32_t post)
7223	#else
7224	static errno_t
7225	ifp_if_framer(struct ifnet ifp, struct* mbuf **m,
7226	const struct sockaddr sa, const* char ll, const* char *t)
7227	#endif /* !CONFIG_EMBEDDED */
7228	{
7229	#pragma unused(ifp, m, sa, ll, t)
7230	#if CONFIG_EMBEDDED
7231	return (ifp_if_framer_extended(ifp, m, sa, ll, t, pre, post));
7232	#else
7233	return (ifp_if_framer_extended(ifp, m, sa, ll, t, NULL, NULL));
7234	#endif /* !CONFIG_EMBEDDED */
7235	}
7236
7237	static errno_t
7238	ifp_if_framer_extended(struct ifnet ifp, struct* mbuf **m,
7239	const struct sockaddr sa, const* char ll, const* char *t,
7240	u_int32_t pre, u_int32_t post)
7241	{
7242	#pragma unused(ifp, sa, ll, t)
7243	m_freem(*m);
7244	*m = NULL;
7245
7246	if (pre != NULL)
7247	*pre = `0`;
7248	if (post != NULL)
7249	*post = `0`;
7250
7251	return (EJUSTRETURN);
7252	}
7253
7254	errno_t
7255	ifp_if_ioctl(struct ifnet ifp, unsigned* long cmd, void *arg)
7256	{
7257	#pragma unused(ifp, cmd, arg)
7258	return (EOPNOTSUPP);
7259	}
7260
7261	static errno_t
7262	ifp_if_set_bpf_tap(struct ifnet *ifp, bpf_tap_mode tm, bpf_packet_func f)
7263	{
7264	#pragma unused(ifp, tm, f)
7265	/ XXX not sure what to do here /
7266	return (`0`);
7267	}
7268
7269	static void
7270	ifp_if_free(struct ifnet *ifp)
7271	{
7272	#pragma unused(ifp)
7273	}
7274
7275	static void
7276	ifp_if_event(struct ifnet ifp, const* struct kev_msg *e)
7277	{
7278	#pragma unused(ifp, e)
7279	}
7280
7281	int dlil_if_acquire(u_int32_t family, const void *uniqueid,
7282	size_t uniqueid_len, const char ifxname, struct* ifnet **ifp)
7283	{
7284	struct ifnet *ifp1 = NULL;
7285	struct dlil_ifnet *dlifp1 = NULL;
7286	void buf, base, **pbuf;
7287	int ret = `0`;
7288
7289	VERIFY(*ifp == NULL);
7290	dlil_if_lock();
7291	/*
7292	* We absolutely can't have an interface with the same name
7293	* in in-use state.
7294	* To make sure of that list has to be traversed completely
7295	*/
7296	TAILQ_FOREACH(dlifp1, &dlil_ifnet_head, dl_if_link) {
7297	ifp1 = (struct ifnet *)dlifp1;
7298
7299	if (ifp1->if_family != family)
7300	continue;
7301
7302	/*
7303	* If interface is in use, return EBUSY if either unique id
7304	* or interface extended names are the same
7305	*/
7306	lck_mtx_lock(&dlifp1->dl_if_lock);
7307	if (strncmp(ifxname, ifp1->if_xname, IFXNAMSIZ) == `0`) {
7308	if (dlifp1->dl_if_flags & DLIF_INUSE) {
7309	lck_mtx_unlock(&dlifp1->dl_if_lock);
7310	ret = EBUSY;
7311	goto end;
7312	}
7313	}
7314
7315	if (uniqueid_len) {
7316	if (uniqueid_len == dlifp1->dl_if_uniqueid_len &&
7317	bcmp(uniqueid, dlifp1->dl_if_uniqueid, uniqueid_len) == `0`) {
7318	if (dlifp1->dl_if_flags & DLIF_INUSE) {
7319	lck_mtx_unlock(&dlifp1->dl_if_lock);
7320	ret = EBUSY;
7321	goto end;
7322	} else {
7323	dlifp1->dl_if_flags \|= (DLIF_INUSE\|DLIF_REUSE);
7324	/ Cache the first interface that can be recycled /
7325	if (*ifp == NULL)
7326	*ifp = ifp1;
7327	/*
7328	* XXX Do not break or jump to end as we have to traverse
7329	* the whole list to ensure there are no name collisions
7330	*/
7331	}
7332	}
7333	}
7334	lck_mtx_unlock(&dlifp1->dl_if_lock);
7335	}
7336
7337	/ If there's an interface that can be recycled, use that /
7338	if (*ifp != NULL)
7339	goto end;
7340
7341	/ no interface found, allocate a new one /
7342	buf = zalloc(dlif_zone);
7343	if (buf == NULL) {
7344	ret = ENOMEM;
7345	goto end;
7346	}
7347	bzero(buf, dlif_bufsize);
7348
7349	/ Get the 64-bit aligned base address for this object /
7350	base = (void )P2ROUNDUP((intptr_t)buf + sizeof* (u_int64_t),
7351	sizeof (u_int64_t));
7352	VERIFY(((intptr_t)base + dlif_size) <= ((intptr_t)buf + dlif_bufsize));
7353
7354	/*
7355	* Wind back a pointer size from the aligned base and
7356	* save the original address so we can free it later.
7357	*/
7358	pbuf = (void )((intptr_t)base - sizeof** (void *));
7359	*pbuf = buf;
7360	dlifp1 = base;
7361
7362	if (uniqueid_len) {
7363	MALLOC(dlifp1->dl_if_uniqueid, void *, uniqueid_len,
7364	M_NKE, M_WAITOK);
7365	if (dlifp1->dl_if_uniqueid == NULL) {
7366	zfree(dlif_zone, buf);
7367	ret = ENOMEM;
7368	goto end;
7369	}
7370	bcopy(uniqueid, dlifp1->dl_if_uniqueid, uniqueid_len);
7371	dlifp1->dl_if_uniqueid_len = uniqueid_len;
7372	}
7373
7374	ifp1 = (struct ifnet *)dlifp1;
7375	dlifp1->dl_if_flags = DLIF_INUSE;
7376	if (ifnet_debug) {
7377	dlifp1->dl_if_flags \|= DLIF_DEBUG;
7378	dlifp1->dl_if_trace = dlil_if_trace;
7379	}
7380	ifp1->if_name = dlifp1->dl_if_namestorage;
7381	ifp1->if_xname = dlifp1->dl_if_xnamestorage;
7382
7383	/ initialize interface description /
7384	ifp1->if_desc.ifd_maxlen = IF_DESCSIZE;
7385	ifp1->if_desc.ifd_len = `0`;
7386	ifp1->if_desc.ifd_desc = dlifp1->dl_if_descstorage;
7387
7388
7389	#if CONFIG_MACF_NET
7390	mac_ifnet_label_init(ifp1);
7391	#endif
7392
7393	if ((ret = dlil_alloc_local_stats(ifp1)) != `0`) {
7394	DLIL_PRINTF("%s: failed to allocate if local stats, "
7395	"error: %d\n", __func__, ret);
7396	/ This probably shouldn't be fatal /
7397	ret = `0`;
7398	}
7399
7400	lck_mtx_init(&dlifp1->dl_if_lock, ifnet_lock_group, ifnet_lock_attr);
7401	lck_rw_init(&ifp1->if_lock, ifnet_lock_group, ifnet_lock_attr);
7402	lck_mtx_init(&ifp1->if_ref_lock, ifnet_lock_group, ifnet_lock_attr);
7403	lck_mtx_init(&ifp1->if_flt_lock, ifnet_lock_group, ifnet_lock_attr);
7404	lck_mtx_init(&ifp1->if_addrconfig_lock, ifnet_lock_group,
7405	ifnet_lock_attr);
7406	lck_rw_init(&ifp1->if_llreach_lock, ifnet_lock_group, ifnet_lock_attr);
7407	#if INET
7408	lck_rw_init(&ifp1->if_inetdata_lock, ifnet_lock_group,
7409	ifnet_lock_attr);
7410	ifp1->if_inetdata = NULL;
7411	#endif
7412	#if INET6
7413	lck_rw_init(&ifp1->if_inet6data_lock, ifnet_lock_group,
7414	ifnet_lock_attr);
7415	ifp1->if_inet6data = NULL;
7416	#endif
7417	lck_rw_init(&ifp1->if_link_status_lock, ifnet_lock_group,
7418	ifnet_lock_attr);
7419	ifp1->if_link_status = NULL;
7420
7421	/ for send data paths /
7422	lck_mtx_init(&ifp1->if_start_lock, ifnet_snd_lock_group,
7423	ifnet_lock_attr);
7424	lck_mtx_init(&ifp1->if_cached_route_lock, ifnet_snd_lock_group,
7425	ifnet_lock_attr);
7426	lck_mtx_init(&ifp1->if_snd.ifcq_lock, ifnet_snd_lock_group,
7427	ifnet_lock_attr);
7428
7429	/ for receive data paths /
7430	lck_mtx_init(&ifp1->if_poll_lock, ifnet_rcv_lock_group,
7431	ifnet_lock_attr);
7432
7433	/ thread call allocation is done with sleeping zalloc /
7434	ifp1->if_dt_tcall = thread_call_allocate_with_options(dlil_dt_tcall_fn,
7435	ifp1, THREAD_CALL_PRIORITY_KERNEL, THREAD_CALL_OPTIONS_ONCE);
7436	if (ifp1->if_dt_tcall == NULL) {
7437	panic_plain("%s: couldn't create if_dt_tcall", __func__);
7438	/ NOTREACHED /
7439	}
7440
7441	TAILQ_INSERT_TAIL(&dlil_ifnet_head, dlifp1, dl_if_link);
7442
7443	*ifp = ifp1;
7444
7445	end:
7446	dlil_if_unlock();
7447
7448	VERIFY(dlifp1 == NULL \|\| (IS_P2ALIGNED(dlifp1, sizeof (u_int64_t)) &&
7449	IS_P2ALIGNED(&ifp1->if_data, sizeof (u_int64_t))));
7450
7451	return (ret);
7452	}
7453
7454	__private_extern__ void
7455	dlil_if_release(ifnet_t ifp)
7456	{
7457	struct dlil_ifnet dlifp = (struct* dlil_ifnet *)ifp;
7458
7459	VERIFY(OSDecrementAtomic64(&net_api_stats.nas_ifnet_alloc_count) > `0`);
7460	if (!(ifp->if_xflags & IFXF_ALLOC_KPI)) {
7461	VERIFY(OSDecrementAtomic64(&net_api_stats.nas_ifnet_alloc_os_count) > `0`);
7462	}
7463
7464	ifnet_lock_exclusive(ifp);
7465	lck_mtx_lock(&dlifp->dl_if_lock);
7466	dlifp->dl_if_flags &= ~DLIF_INUSE;
7467	strlcpy(dlifp->dl_if_namestorage, ifp->if_name, IFNAMSIZ);
7468	ifp->if_name = dlifp->dl_if_namestorage;
7469	/ Reset external name (name + unit) /
7470	ifp->if_xname = dlifp->dl_if_xnamestorage;
7471	snprintf(__DECONST(char *, ifp->if_xname), IFXNAMSIZ,
7472	"%s?", ifp->if_name);
7473	lck_mtx_unlock(&dlifp->dl_if_lock);
7474	#if CONFIG_MACF_NET
7475	/*
7476	* We can either recycle the MAC label here or in dlil_if_acquire().
7477	* It seems logical to do it here but this means that anything that
7478	* still has a handle on ifp will now see it as unlabeled.
7479	* Since the interface is "dead" that may be OK. Revisit later.
7480	*/
7481	mac_ifnet_label_recycle(ifp);
7482	#endif
7483	ifnet_lock_done(ifp);
7484	}
7485
7486	__private_extern__ void
7487	dlil_if_lock(void)
7488	{
7489	lck_mtx_lock(&dlil_ifnet_lock);
7490	}
7491
7492	__private_extern__ void
7493	dlil_if_unlock(void)
7494	{
7495	lck_mtx_unlock(&dlil_ifnet_lock);
7496	}
7497
7498	__private_extern__ void
7499	dlil_if_lock_assert(void)
7500	{
7501	LCK_MTX_ASSERT(&dlil_ifnet_lock, LCK_MTX_ASSERT_OWNED);
7502	}
7503
7504	__private_extern__ void
7505	dlil_proto_unplumb_all(struct ifnet *ifp)
7506	{
7507	/*
7508	* if_proto_hash[0-2] are for PF_INET, PF_INET6 and PF_VLAN, where
7509	* each bucket contains exactly one entry; PF_VLAN does not need an
7510	* explicit unplumb.
7511	*
7512	* if_proto_hash[3] is for other protocols; we expect anything
7513	* in this bucket to respond to the DETACHING event (which would
7514	* have happened by now) and do the unplumb then.
7515	*/
7516	(void) proto_unplumb(PF_INET, ifp);
7517	#if INET6
7518	(void) proto_unplumb(PF_INET6, ifp);
7519	#endif /* INET6 */
7520	}
7521
7522	static void
7523	ifp_src_route_copyout(struct ifnet ifp, struct* route *dst)
7524	{
7525	lck_mtx_lock_spin(&ifp->if_cached_route_lock);
7526	lck_mtx_convert_spin(&ifp->if_cached_route_lock);
7527
7528	route_copyout(dst, &ifp->if_src_route, sizeof (*dst));
7529
7530	lck_mtx_unlock(&ifp->if_cached_route_lock);
7531	}
7532
7533	static void
7534	ifp_src_route_copyin(struct ifnet ifp, struct* route *src)
7535	{
7536	lck_mtx_lock_spin(&ifp->if_cached_route_lock);
7537	lck_mtx_convert_spin(&ifp->if_cached_route_lock);
7538
7539	if (ifp->if_fwd_cacheok) {
7540	route_copyin(src, &ifp->if_src_route, sizeof (*src));
7541	} else {
7542	ROUTE_RELEASE(src);
7543	}
7544	lck_mtx_unlock(&ifp->if_cached_route_lock);
7545	}
7546
7547	#if INET6
7548	static void
7549	ifp_src_route6_copyout(struct ifnet ifp, struct* route_in6 *dst)
7550	{
7551	lck_mtx_lock_spin(&ifp->if_cached_route_lock);
7552	lck_mtx_convert_spin(&ifp->if_cached_route_lock);
7553
7554	route_copyout((struct route )dst, (struct* route *)&ifp->if_src_route6,
7555	sizeof (*dst));
7556
7557	lck_mtx_unlock(&ifp->if_cached_route_lock);
7558	}
7559
7560	static void
7561	ifp_src_route6_copyin(struct ifnet ifp, struct* route_in6 *src)
7562	{
7563	lck_mtx_lock_spin(&ifp->if_cached_route_lock);
7564	lck_mtx_convert_spin(&ifp->if_cached_route_lock);
7565
7566	if (ifp->if_fwd_cacheok) {
7567	route_copyin((struct route *)src,
7568	(struct route )&ifp->if_src_route6, sizeof* (*src));
7569	} else {
7570	ROUTE_RELEASE(src);
7571	}
7572	lck_mtx_unlock(&ifp->if_cached_route_lock);
7573	}
7574	#endif /* INET6 */
7575
7576	struct rtentry *
7577	ifnet_cached_rtlookup_inet(struct ifnet ifp, struct* in_addr src_ip)
7578	{
7579	struct route src_rt;
7580	struct sockaddr_in *dst;
7581
7582	dst = (struct sockaddr_in )(void* *)(&src_rt.ro_dst);
7583
7584	ifp_src_route_copyout(ifp, &src_rt);
7585
7586	if (ROUTE_UNUSABLE(&src_rt) \|\| src_ip.s_addr != dst->sin_addr.s_addr) {
7587	ROUTE_RELEASE(&src_rt);
7588	if (dst->sin_family != AF_INET) {
7589	bzero(&src_rt.ro_dst, sizeof (src_rt.ro_dst));
7590	dst->sin_len = sizeof (src_rt.ro_dst);
7591	dst->sin_family = AF_INET;
7592	}
7593	dst->sin_addr = src_ip;
7594
7595	VERIFY(src_rt.ro_rt == NULL);
7596	src_rt.ro_rt = rtalloc1_scoped((struct sockaddr *)dst,
7597	`0`, `0`, ifp->if_index);
7598
7599	if (src_rt.ro_rt != NULL) {
7600	/ retain a ref, copyin consumes one /
7601	struct rtentry *rte = src_rt.ro_rt;
7602	RT_ADDREF(rte);
7603	ifp_src_route_copyin(ifp, &src_rt);
7604	src_rt.ro_rt = rte;
7605	}
7606	}
7607
7608	return (src_rt.ro_rt);
7609	}
7610
7611	#if INET6
7612	struct rtentry *
7613	ifnet_cached_rtlookup_inet6(struct ifnet ifp, struct* in6_addr *src_ip6)
7614	{
7615	struct route_in6 src_rt;
7616
7617	ifp_src_route6_copyout(ifp, &src_rt);
7618
7619	if (ROUTE_UNUSABLE(&src_rt) \|\|
7620	!IN6_ARE_ADDR_EQUAL(src_ip6, &src_rt.ro_dst.sin6_addr)) {
7621	ROUTE_RELEASE(&src_rt);
7622	if (src_rt.ro_dst.sin6_family != AF_INET6) {
7623	bzero(&src_rt.ro_dst, sizeof (src_rt.ro_dst));
7624	src_rt.ro_dst.sin6_len = sizeof (src_rt.ro_dst);
7625	src_rt.ro_dst.sin6_family = AF_INET6;
7626	}
7627	src_rt.ro_dst.sin6_scope_id = in6_addr2scopeid(ifp, src_ip6);
7628	bcopy(src_ip6, &src_rt.ro_dst.sin6_addr,
7629	sizeof (src_rt.ro_dst.sin6_addr));
7630
7631	if (src_rt.ro_rt == NULL) {
7632	src_rt.ro_rt = rtalloc1_scoped(
7633	(struct sockaddr *)&src_rt.ro_dst, `0`, `0`,
7634	ifp->if_index);
7635
7636	if (src_rt.ro_rt != NULL) {
7637	/ retain a ref, copyin consumes one /
7638	struct rtentry *rte = src_rt.ro_rt;
7639	RT_ADDREF(rte);
7640	ifp_src_route6_copyin(ifp, &src_rt);
7641	src_rt.ro_rt = rte;
7642	}
7643	}
7644	}
7645
7646	return (src_rt.ro_rt);
7647	}
7648	#endif /* INET6 */
7649
7650	void
7651	if_lqm_update(struct ifnet ifp, int* lqm, int locked)
7652	{
7653	struct kev_dl_link_quality_metric_data ev_lqm_data;
7654
7655	VERIFY(lqm >= IFNET_LQM_MIN && lqm <= IFNET_LQM_MAX);
7656
7657	/ Normalize to edge /
7658	if (lqm >= `0` && lqm <= IFNET_LQM_THRESH_ABORT) {
7659	lqm = IFNET_LQM_THRESH_ABORT;
7660	atomic_bitset_32(&tcbinfo.ipi_flags,
7661	INPCBINFO_HANDLE_LQM_ABORT);
7662	inpcb_timer_sched(&tcbinfo, INPCB_TIMER_FAST);
7663	} else if (lqm > IFNET_LQM_THRESH_ABORT &&
7664	lqm <= IFNET_LQM_THRESH_MINIMALLY_VIABLE) {
7665	lqm = IFNET_LQM_THRESH_MINIMALLY_VIABLE;
7666	} else if (lqm > IFNET_LQM_THRESH_MINIMALLY_VIABLE &&
7667	lqm <= IFNET_LQM_THRESH_POOR) {
7668	lqm = IFNET_LQM_THRESH_POOR;
7669	} else if (lqm > IFNET_LQM_THRESH_POOR &&
7670	lqm <= IFNET_LQM_THRESH_GOOD) {
7671	lqm = IFNET_LQM_THRESH_GOOD;
7672	}
7673
7674	/*
7675	* Take the lock if needed
7676	*/
7677	if (!locked)
7678	ifnet_lock_exclusive(ifp);
7679
7680	if (lqm == ifp->if_interface_state.lqm_state &&
7681	(ifp->if_interface_state.valid_bitmask &
7682	IF_INTERFACE_STATE_LQM_STATE_VALID)) {
7683	/*
7684	* Release the lock if was not held by the caller
7685	*/
7686	if (!locked)
7687	ifnet_lock_done(ifp);
7688	return; / nothing to update /
7689	}
7690	ifp->if_interface_state.valid_bitmask \|=
7691	IF_INTERFACE_STATE_LQM_STATE_VALID;
7692	ifp->if_interface_state.lqm_state = lqm;
7693
7694	/*
7695	* Don't want to hold the lock when issuing kernel events
7696	*/
7697	ifnet_lock_done(ifp);
7698
7699	bzero(&ev_lqm_data, sizeof (ev_lqm_data));
7700	ev_lqm_data.link_quality_metric = lqm;
7701
7702	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_LINK_QUALITY_METRIC_CHANGED,
7703	(struct net_event_data )&ev_lqm_data, sizeof* (ev_lqm_data));
7704
7705	/*
7706	* Reacquire the lock for the caller
7707	*/
7708	if (locked)
7709	ifnet_lock_exclusive(ifp);
7710	}
7711
7712	static void
7713	if_rrc_state_update(struct ifnet ifp, unsigned* int rrc_state)
7714	{
7715	struct kev_dl_rrc_state kev;
7716
7717	if (rrc_state == ifp->if_interface_state.rrc_state &&
7718	(ifp->if_interface_state.valid_bitmask &
7719	IF_INTERFACE_STATE_RRC_STATE_VALID))
7720	return;
7721
7722	ifp->if_interface_state.valid_bitmask \|=
7723	IF_INTERFACE_STATE_RRC_STATE_VALID;
7724
7725	ifp->if_interface_state.rrc_state = rrc_state;
7726
7727	/*
7728	* Don't want to hold the lock when issuing kernel events
7729	*/
7730	ifnet_lock_done(ifp);
7731
7732	bzero(&kev, sizeof(struct kev_dl_rrc_state));
7733	kev.rrc_state = rrc_state;
7734
7735	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_RRC_STATE_CHANGED,
7736	(struct net_event_data )&kev, sizeof(struct* kev_dl_rrc_state));
7737
7738	ifnet_lock_exclusive(ifp);
7739	}
7740
7741	errno_t
7742	if_state_update(struct ifnet *ifp,
7743	struct if_interface_state *if_interface_state)
7744	{
7745	u_short if_index_available = `0`;
7746
7747	ifnet_lock_exclusive(ifp);
7748
7749	if ((ifp->if_type != IFT_CELLULAR) &&
7750	(if_interface_state->valid_bitmask &
7751	IF_INTERFACE_STATE_RRC_STATE_VALID)) {
7752	ifnet_lock_done(ifp);
7753	return (ENOTSUP);
7754	}
7755	if ((if_interface_state->valid_bitmask &
7756	IF_INTERFACE_STATE_LQM_STATE_VALID) &&
7757	(if_interface_state->lqm_state < IFNET_LQM_MIN \|\|
7758	if_interface_state->lqm_state > IFNET_LQM_MAX)) {
7759	ifnet_lock_done(ifp);
7760	return (EINVAL);
7761	}
7762	if ((if_interface_state->valid_bitmask &
7763	IF_INTERFACE_STATE_RRC_STATE_VALID) &&
7764	if_interface_state->rrc_state !=
7765	IF_INTERFACE_STATE_RRC_STATE_IDLE &&
7766	if_interface_state->rrc_state !=
7767	IF_INTERFACE_STATE_RRC_STATE_CONNECTED) {
7768	ifnet_lock_done(ifp);
7769	return (EINVAL);
7770	}
7771
7772	if (if_interface_state->valid_bitmask &
7773	IF_INTERFACE_STATE_LQM_STATE_VALID) {
7774	if_lqm_update(ifp, if_interface_state->lqm_state, `1`);
7775	}
7776	if (if_interface_state->valid_bitmask &
7777	IF_INTERFACE_STATE_RRC_STATE_VALID) {
7778	if_rrc_state_update(ifp, if_interface_state->rrc_state);
7779	}
7780	if (if_interface_state->valid_bitmask &
7781	IF_INTERFACE_STATE_INTERFACE_AVAILABILITY_VALID) {
7782	ifp->if_interface_state.valid_bitmask \|=
7783	IF_INTERFACE_STATE_INTERFACE_AVAILABILITY_VALID;
7784	ifp->if_interface_state.interface_availability =
7785	if_interface_state->interface_availability;
7786
7787	if (ifp->if_interface_state.interface_availability ==
7788	IF_INTERFACE_STATE_INTERFACE_AVAILABLE) {
7789	if_index_available = ifp->if_index;
7790	}
7791	}
7792	ifnet_lock_done(ifp);
7793
7794	/*
7795	* Check if the TCP connections going on this interface should be
7796	* forced to send probe packets instead of waiting for TCP timers
7797	* to fire. This will be done when there is an explicit
7798	* notification that the interface became available.
7799	*/
7800	if (if_index_available > `0`)
7801	tcp_interface_send_probe(if_index_available);
7802
7803	return (`0`);
7804	}
7805
7806	void
7807	if_get_state(struct ifnet *ifp,
7808	struct if_interface_state *if_interface_state)
7809	{
7810	ifnet_lock_shared(ifp);
7811
7812	if_interface_state->valid_bitmask = `0`;
7813
7814	if (ifp->if_interface_state.valid_bitmask &
7815	IF_INTERFACE_STATE_RRC_STATE_VALID) {
7816	if_interface_state->valid_bitmask \|=
7817	IF_INTERFACE_STATE_RRC_STATE_VALID;
7818	if_interface_state->rrc_state =
7819	ifp->if_interface_state.rrc_state;
7820	}
7821	if (ifp->if_interface_state.valid_bitmask &
7822	IF_INTERFACE_STATE_LQM_STATE_VALID) {
7823	if_interface_state->valid_bitmask \|=
7824	IF_INTERFACE_STATE_LQM_STATE_VALID;
7825	if_interface_state->lqm_state =
7826	ifp->if_interface_state.lqm_state;
7827	}
7828	if (ifp->if_interface_state.valid_bitmask &
7829	IF_INTERFACE_STATE_INTERFACE_AVAILABILITY_VALID) {
7830	if_interface_state->valid_bitmask \|=
7831	IF_INTERFACE_STATE_INTERFACE_AVAILABILITY_VALID;
7832	if_interface_state->interface_availability =
7833	ifp->if_interface_state.interface_availability;
7834	}
7835
7836	ifnet_lock_done(ifp);
7837	}
7838
7839	errno_t
7840	if_probe_connectivity(struct ifnet *ifp, u_int32_t conn_probe)
7841	{
7842	ifnet_lock_exclusive(ifp);
7843	if (conn_probe > `1`) {
7844	ifnet_lock_done(ifp);
7845	return (EINVAL);
7846	}
7847	if (conn_probe == `0`)
7848	ifp->if_eflags &= ~IFEF_PROBE_CONNECTIVITY;
7849	else
7850	ifp->if_eflags \|= IFEF_PROBE_CONNECTIVITY;
7851	ifnet_lock_done(ifp);
7852
7853	#if NECP
7854	necp_update_all_clients();
7855	#endif /* NECP */
7856
7857	tcp_probe_connectivity(ifp, conn_probe);
7858	return (`0`);
7859	}
7860
7861	/ for uuid.c /
7862	int
7863	uuid_get_ethernet(u_int8_t *node)
7864	{
7865	struct ifnet *ifp;
7866	struct sockaddr_dl *sdl;
7867
7868	ifnet_head_lock_shared();
7869	TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
7870	ifnet_lock_shared(ifp);
7871	IFA_LOCK_SPIN(ifp->if_lladdr);
7872	sdl = (struct sockaddr_dl )(void* *)ifp->if_lladdr->ifa_addr;
7873	if (sdl->sdl_type == IFT_ETHER) {
7874	memcpy(node, LLADDR(sdl), ETHER_ADDR_LEN);
7875	IFA_UNLOCK(ifp->if_lladdr);
7876	ifnet_lock_done(ifp);
7877	ifnet_head_done();
7878	return (`0`);
7879	}
7880	IFA_UNLOCK(ifp->if_lladdr);
7881	ifnet_lock_done(ifp);
7882	}
7883	ifnet_head_done();
7884
7885	return (-`1`);
7886	}
7887
7888	static int
7889	sysctl_rxpoll SYSCTL_HANDLER_ARGS
7890	{
7891	#pragma unused(arg1, arg2)
7892	uint32_t i;
7893	int err;
7894
7895	i = if_rxpoll;
7896
7897	err = sysctl_handle_int(oidp, &i, `0`, req);
7898	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
7899	return (err);
7900
7901	if (net_rxpoll == `0`)
7902	return (ENXIO);
7903
7904	if_rxpoll = i;
7905	return (err);
7906	}
7907
7908	static int
7909	sysctl_rxpoll_mode_holdtime SYSCTL_HANDLER_ARGS
7910	{
7911	#pragma unused(arg1, arg2)
7912	uint64_t q;
7913	int err;
7914
7915	q = if_rxpoll_mode_holdtime;
7916
7917	err = sysctl_handle_quad(oidp, &q, `0`, req);
7918	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
7919	return (err);
7920
7921	if (q < IF_RXPOLL_MODE_HOLDTIME_MIN)
7922	q = IF_RXPOLL_MODE_HOLDTIME_MIN;
7923
7924	if_rxpoll_mode_holdtime = q;
7925
7926	return (err);
7927	}
7928
7929	static int
7930	sysctl_rxpoll_sample_holdtime SYSCTL_HANDLER_ARGS
7931	{
7932	#pragma unused(arg1, arg2)
7933	uint64_t q;
7934	int err;
7935
7936	q = if_rxpoll_sample_holdtime;
7937
7938	err = sysctl_handle_quad(oidp, &q, `0`, req);
7939	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
7940	return (err);
7941
7942	if (q < IF_RXPOLL_SAMPLETIME_MIN)
7943	q = IF_RXPOLL_SAMPLETIME_MIN;
7944
7945	if_rxpoll_sample_holdtime = q;
7946
7947	return (err);
7948	}
7949
7950	static int
7951	sysctl_rxpoll_interval_time SYSCTL_HANDLER_ARGS
7952	{
7953	#pragma unused(arg1, arg2)
7954	uint64_t q;
7955	int err;
7956
7957	q = if_rxpoll_interval_time;
7958
7959	err = sysctl_handle_quad(oidp, &q, `0`, req);
7960	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
7961	return (err);
7962
7963	if (q < IF_RXPOLL_INTERVALTIME_MIN)
7964	q = IF_RXPOLL_INTERVALTIME_MIN;
7965
7966	if_rxpoll_interval_time = q;
7967
7968	return (err);
7969	}
7970
7971	static int
7972	sysctl_rxpoll_wlowat SYSCTL_HANDLER_ARGS
7973	{
7974	#pragma unused(arg1, arg2)
7975	uint32_t i;
7976	int err;
7977
7978	i = if_rxpoll_wlowat;
7979
7980	err = sysctl_handle_int(oidp, &i, `0`, req);
7981	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
7982	return (err);
7983
7984	if (i == `0` \|\| i >= if_rxpoll_whiwat)
7985	return (EINVAL);
7986
7987	if_rxpoll_wlowat = i;
7988	return (err);
7989	}
7990
7991	static int
7992	sysctl_rxpoll_whiwat SYSCTL_HANDLER_ARGS
7993	{
7994	#pragma unused(arg1, arg2)
7995	uint32_t i;
7996	int err;
7997
7998	i = if_rxpoll_whiwat;
7999
8000	err = sysctl_handle_int(oidp, &i, `0`, req);
8001	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
8002	return (err);
8003
8004	if (i <= if_rxpoll_wlowat)
8005	return (EINVAL);
8006
8007	if_rxpoll_whiwat = i;
8008	return (err);
8009	}
8010
8011	static int
8012	sysctl_sndq_maxlen SYSCTL_HANDLER_ARGS
8013	{
8014	#pragma unused(arg1, arg2)
8015	int i, err;
8016
8017	i = if_sndq_maxlen;
8018
8019	err = sysctl_handle_int(oidp, &i, `0`, req);
8020	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
8021	return (err);
8022
8023	if (i < IF_SNDQ_MINLEN)
8024	i = IF_SNDQ_MINLEN;
8025
8026	if_sndq_maxlen = i;
8027	return (err);
8028	}
8029
8030	static int
8031	sysctl_rcvq_maxlen SYSCTL_HANDLER_ARGS
8032	{
8033	#pragma unused(arg1, arg2)
8034	int i, err;
8035
8036	i = if_rcvq_maxlen;
8037
8038	err = sysctl_handle_int(oidp, &i, `0`, req);
8039	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
8040	return (err);
8041
8042	if (i < IF_RCVQ_MINLEN)
8043	i = IF_RCVQ_MINLEN;
8044
8045	if_rcvq_maxlen = i;
8046	return (err);
8047	}
8048
8049	void
8050	dlil_node_present(struct ifnet ifp, struct* sockaddr *sa,
8051	int32_t rssi, int lqm, int npm, u_int8_t srvinfo[`48`])
8052	{
8053	struct kev_dl_node_presence kev;
8054	struct sockaddr_dl *sdl;
8055	struct sockaddr_in6 *sin6;
8056
8057	VERIFY(ifp);
8058	VERIFY(sa);
8059	VERIFY(sa->sa_family == AF_LINK \|\| sa->sa_family == AF_INET6);
8060
8061	bzero(&kev, sizeof (kev));
8062	sin6 = &kev.sin6_node_address;
8063	sdl = &kev.sdl_node_address;
8064	nd6_alt_node_addr_decompose(ifp, sa, sdl, sin6);
8065	kev.rssi = rssi;
8066	kev.link_quality_metric = lqm;
8067	kev.node_proximity_metric = npm;
8068	bcopy(srvinfo, kev.node_service_info, sizeof (kev.node_service_info));
8069
8070	nd6_alt_node_present(ifp, sin6, sdl, rssi, lqm, npm);
8071	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_NODE_PRESENCE,
8072	&kev.link_data, sizeof (kev));
8073	}
8074
8075	void
8076	dlil_node_absent(struct ifnet ifp, struct* sockaddr *sa)
8077	{
8078	struct kev_dl_node_absence kev;
8079	struct sockaddr_in6 *sin6;
8080	struct sockaddr_dl *sdl;
8081
8082	VERIFY(ifp);
8083	VERIFY(sa);
8084	VERIFY(sa->sa_family == AF_LINK \|\| sa->sa_family == AF_INET6);
8085
8086	bzero(&kev, sizeof (kev));
8087	sin6 = &kev.sin6_node_address;
8088	sdl = &kev.sdl_node_address;
8089	nd6_alt_node_addr_decompose(ifp, sa, sdl, sin6);
8090
8091	nd6_alt_node_absent(ifp, sin6);
8092	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_NODE_ABSENCE,
8093	&kev.link_data, sizeof (kev));
8094	}
8095
8096	const void *
8097	dlil_ifaddr_bytes(const struct sockaddr_dl sdl, size_t sizep,
8098	kauth_cred_t *credp)
8099	{
8100	const u_int8_t *bytes;
8101	size_t size;
8102
8103	bytes = CONST_LLADDR(sdl);
8104	size = sdl->sdl_alen;
8105
8106	#if CONFIG_MACF
8107	if (dlil_lladdr_ckreq) {
8108	switch (sdl->sdl_type) {
8109	case IFT_ETHER:
8110	case IFT_IEEE1394:
8111	break;
8112	default:
8113	credp = NULL;
8114	break;
8115	};
8116
8117	if (credp && mac_system_check_info(*credp, "net.link.addr")) {
8118	static const u_int8_t unspec[FIREWIRE_EUI64_LEN] = {
8119	[`0`] = `2`
8120	};
8121
8122	bytes = unspec;
8123	}
8124	}
8125	#else
8126	#pragma unused(credp)
8127	#endif
8128
8129	if (sizep != NULL) *sizep = size;
8130	return (bytes);
8131	}
8132
8133	void
8134	dlil_report_issues(struct ifnet *ifp, u_int8_t modid[DLIL_MODIDLEN],
8135	u_int8_t info[DLIL_MODARGLEN])
8136	{
8137	struct kev_dl_issues kev;
8138	struct timeval tv;
8139
8140	VERIFY(ifp != NULL);
8141	VERIFY(modid != NULL);
8142	_CASSERT(sizeof (kev.modid) == DLIL_MODIDLEN);
8143	_CASSERT(sizeof (kev.info) == DLIL_MODARGLEN);
8144
8145	bzero(&kev, sizeof (kev));
8146
8147	microtime(&tv);
8148	kev.timestamp = tv.tv_sec;
8149	bcopy(modid, &kev.modid, DLIL_MODIDLEN);
8150	if (info != NULL)
8151	bcopy(info, &kev.info, DLIL_MODARGLEN);
8152
8153	dlil_post_msg(ifp, KEV_DL_SUBCLASS, KEV_DL_ISSUES,
8154	&kev.link_data, sizeof (kev));
8155	}
8156
8157	errno_t
8158	ifnet_getset_opportunistic(ifnet_t ifp, u_long cmd, struct ifreq *ifr,
8159	struct proc *p)
8160	{
8161	u_int32_t level = IFNET_THROTTLE_OFF;
8162	errno_t result = `0`;
8163
8164	VERIFY(cmd == SIOCSIFOPPORTUNISTIC \|\| cmd == SIOCGIFOPPORTUNISTIC);
8165
8166	if (cmd == SIOCSIFOPPORTUNISTIC) {
8167	/*
8168	* XXX: Use priv_check_cred() instead of root check?
8169	*/
8170	if ((result = proc_suser(p)) != `0`)
8171	return (result);
8172
8173	if (ifr->ifr_opportunistic.ifo_flags ==
8174	IFRIFOF_BLOCK_OPPORTUNISTIC)
8175	level = IFNET_THROTTLE_OPPORTUNISTIC;
8176	else if (ifr->ifr_opportunistic.ifo_flags == `0`)
8177	level = IFNET_THROTTLE_OFF;
8178	else
8179	result = EINVAL;
8180
8181	if (result == `0`)
8182	result = ifnet_set_throttle(ifp, level);
8183	} else if ((result = ifnet_get_throttle(ifp, &level)) == `0`) {
8184	ifr->ifr_opportunistic.ifo_flags = `0`;
8185	if (level == IFNET_THROTTLE_OPPORTUNISTIC) {
8186	ifr->ifr_opportunistic.ifo_flags \|=
8187	IFRIFOF_BLOCK_OPPORTUNISTIC;
8188	}
8189	}
8190
8191	/*
8192	* Return the count of current opportunistic connections
8193	* over the interface.
8194	*/
8195	if (result == `0`) {
8196	uint32_t flags = `0`;
8197	flags \|= (cmd == SIOCSIFOPPORTUNISTIC) ?
8198	INPCB_OPPORTUNISTIC_SETCMD : `0`;
8199	flags \|= (level == IFNET_THROTTLE_OPPORTUNISTIC) ?
8200	INPCB_OPPORTUNISTIC_THROTTLEON : `0`;
8201	ifr->ifr_opportunistic.ifo_inuse =
8202	udp_count_opportunistic(ifp->if_index, flags) +
8203	tcp_count_opportunistic(ifp->if_index, flags);
8204	}
8205
8206	if (result == EALREADY)
8207	result = `0`;
8208
8209	return (result);
8210	}
8211
8212	int
8213	ifnet_get_throttle(struct ifnet ifp, u_int32_t level)
8214	{
8215	struct ifclassq *ifq;
8216	int err = `0`;
8217
8218	if (!(ifp->if_eflags & IFEF_TXSTART))
8219	return (ENXIO);
8220
8221	*level = IFNET_THROTTLE_OFF;
8222
8223	ifq = &ifp->if_snd;
8224	IFCQ_LOCK(ifq);
8225	/ Throttling works only for IFCQ, not ALTQ instances /
8226	if (IFCQ_IS_ENABLED(ifq))
8227	IFCQ_GET_THROTTLE(ifq, *level, err);
8228	IFCQ_UNLOCK(ifq);
8229
8230	return (err);
8231	}
8232
8233	int
8234	ifnet_set_throttle(struct ifnet *ifp, u_int32_t level)
8235	{
8236	struct ifclassq *ifq;
8237	int err = `0`;
8238
8239	if (!(ifp->if_eflags & IFEF_TXSTART))
8240	return (ENXIO);
8241
8242	ifq = &ifp->if_snd;
8243
8244	switch (level) {
8245	case IFNET_THROTTLE_OFF:
8246	case IFNET_THROTTLE_OPPORTUNISTIC:
8247	break;
8248	default:
8249	return (EINVAL);
8250	}
8251
8252	IFCQ_LOCK(ifq);
8253	if (IFCQ_IS_ENABLED(ifq))
8254	IFCQ_SET_THROTTLE(ifq, level, err);
8255	IFCQ_UNLOCK(ifq);
8256
8257	if (err == `0`) {
8258	printf("%s: throttling level set to %d\n", if_name(ifp),
8259	level);
8260	if (level == IFNET_THROTTLE_OFF)
8261	ifnet_start(ifp);
8262	}
8263
8264	return (err);
8265	}
8266
8267	errno_t
8268	ifnet_getset_log(ifnet_t ifp, u_long cmd, struct ifreq *ifr,
8269	struct proc *p)
8270	{
8271	#pragma unused(p)
8272	errno_t result = `0`;
8273	uint32_t flags;
8274	int level, category, subcategory;
8275
8276	VERIFY(cmd == SIOCSIFLOG \|\| cmd == SIOCGIFLOG);
8277
8278	if (cmd == SIOCSIFLOG) {
8279	if ((result = priv_check_cred(kauth_cred_get(),
8280	PRIV_NET_INTERFACE_CONTROL, `0`)) != `0`)
8281	return (result);
8282
8283	level = ifr->ifr_log.ifl_level;
8284	if (level < IFNET_LOG_MIN \|\| level > IFNET_LOG_MAX)
8285	result = EINVAL;
8286
8287	flags = ifr->ifr_log.ifl_flags;
8288	if ((flags &= IFNET_LOGF_MASK) == `0`)
8289	result = EINVAL;
8290
8291	category = ifr->ifr_log.ifl_category;
8292	subcategory = ifr->ifr_log.ifl_subcategory;
8293
8294	if (result == `0`)
8295	result = ifnet_set_log(ifp, level, flags,
8296	category, subcategory);
8297	} else {
8298	result = ifnet_get_log(ifp, &level, &flags, &category,
8299	&subcategory);
8300	if (result == `0`) {
8301	ifr->ifr_log.ifl_level = level;
8302	ifr->ifr_log.ifl_flags = flags;
8303	ifr->ifr_log.ifl_category = category;
8304	ifr->ifr_log.ifl_subcategory = subcategory;
8305	}
8306	}
8307
8308	return (result);
8309	}
8310
8311	int
8312	ifnet_set_log(struct ifnet *ifp, int32_t level, uint32_t flags,
8313	int32_t category, int32_t subcategory)
8314	{
8315	int err = `0`;
8316
8317	VERIFY(level >= IFNET_LOG_MIN && level <= IFNET_LOG_MAX);
8318	VERIFY(flags & IFNET_LOGF_MASK);
8319
8320	/*
8321	* The logging level applies to all facilities; make sure to
8322	* update them all with the most current level.
8323	*/
8324	flags \|= ifp->if_log.flags;
8325
8326	if (ifp->if_output_ctl != NULL) {
8327	struct ifnet_log_params l;
8328
8329	bzero(&l, sizeof (l));
8330	l.level = level;
8331	l.flags = flags;
8332	l.flags &= ~IFNET_LOGF_DLIL;
8333	l.category = category;
8334	l.subcategory = subcategory;
8335
8336	/ Send this request to lower layers /
8337	if (l.flags != `0`) {
8338	err = ifp->if_output_ctl(ifp, IFNET_CTL_SET_LOG,
8339	sizeof (l), &l);
8340	}
8341	} else if ((flags & ~IFNET_LOGF_DLIL) && ifp->if_output_ctl == NULL) {
8342	/*
8343	* If targeted to the lower layers without an output
8344	* control callback registered on the interface, just
8345	* silently ignore facilities other than ours.
8346	*/
8347	flags &= IFNET_LOGF_DLIL;
8348	if (flags == `0` && (!(ifp->if_log.flags & IFNET_LOGF_DLIL)))
8349	level = `0`;
8350	}
8351
8352	if (err == `0`) {
8353	if ((ifp->if_log.level = level) == IFNET_LOG_DEFAULT)
8354	ifp->if_log.flags = `0`;
8355	else
8356	ifp->if_log.flags \|= flags;
8357
8358	log(LOG_INFO, "%s: logging level set to %d flags=%b "
8359	"arg=%b, category=%d subcategory=%d\n", if_name(ifp),
8360	ifp->if_log.level, ifp->if_log.flags,
8361	IFNET_LOGF_BITS, flags, IFNET_LOGF_BITS,
8362	category, subcategory);
8363	}
8364
8365	return (err);
8366	}
8367
8368	int
8369	ifnet_get_log(struct ifnet ifp, int32_t level, uint32_t *flags,
8370	int32_t category, int32_t subcategory)
8371	{
8372	if (level != NULL)
8373	*level = ifp->if_log.level;
8374	if (flags != NULL)
8375	*flags = ifp->if_log.flags;
8376	if (category != NULL)
8377	*category = ifp->if_log.category;
8378	if (subcategory != NULL)
8379	*subcategory = ifp->if_log.subcategory;
8380
8381	return (`0`);
8382	}
8383
8384	int
8385	ifnet_notify_address(struct ifnet ifp, int* af)
8386	{
8387	struct ifnet_notify_address_params na;
8388
8389	#if PF
8390	(void) pf_ifaddr_hook(ifp);
8391	#endif /* PF */
8392
8393	if (ifp->if_output_ctl == NULL)
8394	return (EOPNOTSUPP);
8395
8396	bzero(&na, sizeof (na));
8397	na.address_family = af;
8398
8399	return (ifp->if_output_ctl(ifp, IFNET_CTL_NOTIFY_ADDRESS,
8400	sizeof (na), &na));
8401	}
8402
8403	errno_t
8404	ifnet_flowid(struct ifnet ifp, uint32_t flowid)
8405	{
8406	if (ifp == NULL \|\| flowid == NULL) {
8407	return (EINVAL);
8408	} else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
8409	!IF_FULLY_ATTACHED(ifp)) {
8410	return (ENXIO);
8411	}
8412
8413	*flowid = ifp->if_flowhash;
8414
8415	return (`0`);
8416	}
8417
8418	errno_t
8419	ifnet_disable_output(struct ifnet *ifp)
8420	{
8421	int err;
8422
8423	if (ifp == NULL) {
8424	return (EINVAL);
8425	} else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
8426	!IF_FULLY_ATTACHED(ifp)) {
8427	return (ENXIO);
8428	}
8429
8430	if ((err = ifnet_fc_add(ifp)) == `0`) {
8431	lck_mtx_lock_spin(&ifp->if_start_lock);
8432	ifp->if_start_flags \|= IFSF_FLOW_CONTROLLED;
8433	lck_mtx_unlock(&ifp->if_start_lock);
8434	}
8435	return (err);
8436	}
8437
8438	errno_t
8439	ifnet_enable_output(struct ifnet *ifp)
8440	{
8441	if (ifp == NULL) {
8442	return (EINVAL);
8443	} else if (!(ifp->if_eflags & IFEF_TXSTART) \|\|
8444	!IF_FULLY_ATTACHED(ifp)) {
8445	return (ENXIO);
8446	}
8447
8448	ifnet_start_common(ifp, TRUE);
8449	return (`0`);
8450	}
8451
8452	void
8453	ifnet_flowadv(uint32_t flowhash)
8454	{
8455	struct ifnet_fc_entry *ifce;
8456	struct ifnet *ifp;
8457
8458	ifce = ifnet_fc_get(flowhash);
8459	if (ifce == NULL)
8460	return;
8461
8462	VERIFY(ifce->ifce_ifp != NULL);
8463	ifp = ifce->ifce_ifp;
8464
8465	/ flow hash gets recalculated per attach, so check /
8466	if (ifnet_is_attached(ifp, `1`)) {
8467	if (ifp->if_flowhash == flowhash)
8468	(void) ifnet_enable_output(ifp);
8469	ifnet_decr_iorefcnt(ifp);
8470	}
8471	ifnet_fc_entry_free(ifce);
8472	}
8473
8474	/*
8475	* Function to compare ifnet_fc_entries in ifnet flow control tree
8476	*/
8477	static inline int
8478	ifce_cmp(const struct ifnet_fc_entry fc1, const* struct ifnet_fc_entry *fc2)
8479	{
8480	return (fc1->ifce_flowhash - fc2->ifce_flowhash);
8481	}
8482
8483	static int
8484	ifnet_fc_add(struct ifnet *ifp)
8485	{
8486	struct ifnet_fc_entry keyfc, *ifce;
8487	uint32_t flowhash;
8488
8489	VERIFY(ifp != NULL && (ifp->if_eflags & IFEF_TXSTART));
8490	VERIFY(ifp->if_flowhash != `0`);
8491	flowhash = ifp->if_flowhash;
8492
8493	bzero(&keyfc, sizeof (keyfc));
8494	keyfc.ifce_flowhash = flowhash;
8495
8496	lck_mtx_lock_spin(&ifnet_fc_lock);
8497	ifce = RB_FIND(ifnet_fc_tree, &ifnet_fc_tree, &keyfc);
8498	if (ifce != NULL && ifce->ifce_ifp == ifp) {
8499	/ Entry is already in ifnet_fc_tree, return /
8500	lck_mtx_unlock(&ifnet_fc_lock);
8501	return (`0`);
8502	}
8503
8504	if (ifce != NULL) {
8505	/*
8506	* There is a different fc entry with the same flow hash
8507	* but different ifp pointer. There can be a collision
8508	* on flow hash but the probability is low. Let's just
8509	* avoid adding a second one when there is a collision.
8510	*/
8511	lck_mtx_unlock(&ifnet_fc_lock);
8512	return (EAGAIN);
8513	}
8514
8515	/ become regular mutex /
8516	lck_mtx_convert_spin(&ifnet_fc_lock);
8517
8518	ifce = zalloc(ifnet_fc_zone);
8519	if (ifce == NULL) {
8520	/ memory allocation failed /
8521	lck_mtx_unlock(&ifnet_fc_lock);
8522	return (ENOMEM);
8523	}
8524	bzero(ifce, ifnet_fc_zone_size);
8525
8526	ifce->ifce_flowhash = flowhash;
8527	ifce->ifce_ifp = ifp;
8528
8529	RB_INSERT(ifnet_fc_tree, &ifnet_fc_tree, ifce);
8530	lck_mtx_unlock(&ifnet_fc_lock);
8531	return (`0`);
8532	}
8533
8534	static struct ifnet_fc_entry *
8535	ifnet_fc_get(uint32_t flowhash)
8536	{
8537	struct ifnet_fc_entry keyfc, *ifce;
8538	struct ifnet *ifp;
8539
8540	bzero(&keyfc, sizeof (keyfc));
8541	keyfc.ifce_flowhash = flowhash;
8542
8543	lck_mtx_lock_spin(&ifnet_fc_lock);
8544	ifce = RB_FIND(ifnet_fc_tree, &ifnet_fc_tree, &keyfc);
8545	if (ifce == NULL) {
8546	/ Entry is not present in ifnet_fc_tree, return /
8547	lck_mtx_unlock(&ifnet_fc_lock);
8548	return (NULL);
8549	}
8550
8551	RB_REMOVE(ifnet_fc_tree, &ifnet_fc_tree, ifce);
8552
8553	VERIFY(ifce->ifce_ifp != NULL);
8554	ifp = ifce->ifce_ifp;
8555
8556	/ become regular mutex /
8557	lck_mtx_convert_spin(&ifnet_fc_lock);
8558
8559	if (!ifnet_is_attached(ifp, `0`)) {
8560	/*
8561	* This ifp is not attached or in the process of being
8562	* detached; just don't process it.
8563	*/
8564	ifnet_fc_entry_free(ifce);
8565	ifce = NULL;
8566	}
8567	lck_mtx_unlock(&ifnet_fc_lock);
8568
8569	return (ifce);
8570	}
8571
8572	static void
8573	ifnet_fc_entry_free(struct ifnet_fc_entry *ifce)
8574	{
8575	zfree(ifnet_fc_zone, ifce);
8576	}
8577
8578	static uint32_t
8579	ifnet_calc_flowhash(struct ifnet *ifp)
8580	{
8581	struct ifnet_flowhash_key fh __attribute__((aligned(`8`)));
8582	uint32_t flowhash = `0`;
8583
8584	if (ifnet_flowhash_seed == `0`)
8585	ifnet_flowhash_seed = RandomULong();
8586
8587	bzero(&fh, sizeof (fh));
8588
8589	(void) snprintf(fh.ifk_name, sizeof (fh.ifk_name), "%s", ifp->if_name);
8590	fh.ifk_unit = ifp->if_unit;
8591	fh.ifk_flags = ifp->if_flags;
8592	fh.ifk_eflags = ifp->if_eflags;
8593	fh.ifk_capabilities = ifp->if_capabilities;
8594	fh.ifk_capenable = ifp->if_capenable;
8595	fh.ifk_output_sched_model = ifp->if_output_sched_model;
8596	fh.ifk_rand1 = RandomULong();
8597	fh.ifk_rand2 = RandomULong();
8598
8599	try_again:
8600	flowhash = net_flowhash(&fh, sizeof (fh), ifnet_flowhash_seed);
8601	if (flowhash == `0`) {
8602	/ try to get a non-zero flowhash /
8603	ifnet_flowhash_seed = RandomULong();
8604	goto try_again;
8605	}
8606
8607	return (flowhash);
8608	}
8609
8610	int
8611	ifnet_set_netsignature(struct ifnet *ifp, uint8_t family, uint8_t len,
8612	uint16_t flags, uint8_t *data)
8613	{
8614	#pragma unused(flags)
8615	int error = `0`;
8616
8617	switch (family) {
8618	case AF_INET:
8619	if_inetdata_lock_exclusive(ifp);
8620	if (IN_IFEXTRA(ifp) != NULL) {
8621	if (len == `0`) {
8622	/ Allow clearing the signature /
8623	IN_IFEXTRA(ifp)->netsig_len = `0`;
8624	bzero(IN_IFEXTRA(ifp)->netsig,
8625	sizeof (IN_IFEXTRA(ifp)->netsig));
8626	if_inetdata_lock_done(ifp);
8627	break;
8628	} else if (len > sizeof (IN_IFEXTRA(ifp)->netsig)) {
8629	error = EINVAL;
8630	if_inetdata_lock_done(ifp);
8631	break;
8632	}
8633	IN_IFEXTRA(ifp)->netsig_len = len;
8634	bcopy(data, IN_IFEXTRA(ifp)->netsig, len);
8635	} else {
8636	error = ENOMEM;
8637	}
8638	if_inetdata_lock_done(ifp);
8639	break;
8640
8641	case AF_INET6:
8642	if_inet6data_lock_exclusive(ifp);
8643	if (IN6_IFEXTRA(ifp) != NULL) {
8644	if (len == `0`) {
8645	/ Allow clearing the signature /
8646	IN6_IFEXTRA(ifp)->netsig_len = `0`;
8647	bzero(IN6_IFEXTRA(ifp)->netsig,
8648	sizeof (IN6_IFEXTRA(ifp)->netsig));
8649	if_inet6data_lock_done(ifp);
8650	break;
8651	} else if (len > sizeof (IN6_IFEXTRA(ifp)->netsig)) {
8652	error = EINVAL;
8653	if_inet6data_lock_done(ifp);
8654	break;
8655	}
8656	IN6_IFEXTRA(ifp)->netsig_len = len;
8657	bcopy(data, IN6_IFEXTRA(ifp)->netsig, len);
8658	} else {
8659	error = ENOMEM;
8660	}
8661	if_inet6data_lock_done(ifp);
8662	break;
8663
8664	default:
8665	error = EINVAL;
8666	break;
8667	}
8668
8669	return (error);
8670	}
8671
8672	int
8673	ifnet_get_netsignature(struct ifnet ifp, uint8_t family, uint8_t len,
8674	uint16_t flags, uint8_t data)
8675	{
8676	int error = `0`;
8677
8678	if (ifp == NULL \|\| len == NULL \|\| data == NULL)
8679	return (EINVAL);
8680
8681	switch (family) {
8682	case AF_INET:
8683	if_inetdata_lock_shared(ifp);
8684	if (IN_IFEXTRA(ifp) != NULL) {
8685	if (len == `0` \|\| len < IN_IFEXTRA(ifp)->netsig_len) {
8686	error = EINVAL;
8687	if_inetdata_lock_done(ifp);
8688	break;
8689	}
8690	if ((*len = IN_IFEXTRA(ifp)->netsig_len) > `0`)
8691	bcopy(IN_IFEXTRA(ifp)->netsig, data, *len);
8692	else
8693	error = ENOENT;
8694	} else {
8695	error = ENOMEM;
8696	}
8697	if_inetdata_lock_done(ifp);
8698	break;
8699
8700	case AF_INET6:
8701	if_inet6data_lock_shared(ifp);
8702	if (IN6_IFEXTRA(ifp) != NULL) {
8703	if (len == `0` \|\| len < IN6_IFEXTRA(ifp)->netsig_len) {
8704	error = EINVAL;
8705	if_inet6data_lock_done(ifp);
8706	break;
8707	}
8708	if ((*len = IN6_IFEXTRA(ifp)->netsig_len) > `0`)
8709	bcopy(IN6_IFEXTRA(ifp)->netsig, data, *len);
8710	else
8711	error = ENOENT;
8712	} else {
8713	error = ENOMEM;
8714	}
8715	if_inet6data_lock_done(ifp);
8716	break;
8717
8718	default:
8719	error = EINVAL;
8720	break;
8721	}
8722
8723	if (error == `0` && flags != NULL)
8724	*flags = `0`;
8725
8726	return (error);
8727	}
8728
8729	#if INET6
8730	int
8731	ifnet_set_nat64prefix(struct ifnet ifp, struct* ipv6_prefix *prefixes)
8732	{
8733	int i, error = `0`, one_set = `0`;
8734
8735	if_inet6data_lock_exclusive(ifp);
8736
8737	if (IN6_IFEXTRA(ifp) == NULL) {
8738	error = ENOMEM;
8739	goto out;
8740	}
8741
8742	for (i = `0`; i < NAT64_MAX_NUM_PREFIXES; i++) {
8743	uint32_t prefix_len =
8744	prefixes[i].prefix_len;
8745	struct in6_addr *prefix =
8746	&prefixes[i].ipv6_prefix;
8747
8748	if (prefix_len == `0`) {
8749	clat_log0((LOG_DEBUG,
8750	"NAT64 prefixes purged from Interface %s\n",
8751	if_name(ifp)));
8752	/ Allow clearing the signature /
8753	IN6_IFEXTRA(ifp)->nat64_prefixes[i].prefix_len = `0`;
8754	bzero(&IN6_IFEXTRA(ifp)->nat64_prefixes[i].ipv6_prefix,
8755	sizeof(struct in6_addr));
8756
8757	continue;
8758	} else if (prefix_len != NAT64_PREFIX_LEN_32 &&
8759	prefix_len != NAT64_PREFIX_LEN_40 &&
8760	prefix_len != NAT64_PREFIX_LEN_48 &&
8761	prefix_len != NAT64_PREFIX_LEN_56 &&
8762	prefix_len != NAT64_PREFIX_LEN_64 &&
8763	prefix_len != NAT64_PREFIX_LEN_96) {
8764	clat_log0((LOG_DEBUG,
8765	"NAT64 prefixlen is incorrect %d\n", prefix_len));
8766	error = EINVAL;
8767	goto out;
8768	}
8769
8770	if (IN6_IS_SCOPE_EMBED(prefix)) {
8771	clat_log0((LOG_DEBUG,
8772	"NAT64 prefix has interface/link local scope.\n"));
8773	error = EINVAL;
8774	goto out;
8775	}
8776
8777	IN6_IFEXTRA(ifp)->nat64_prefixes[i].prefix_len = prefix_len;
8778	bcopy(prefix, &IN6_IFEXTRA(ifp)->nat64_prefixes[i].ipv6_prefix,
8779	sizeof(struct in6_addr));
8780	clat_log0((LOG_DEBUG,
8781	"NAT64 prefix set to %s with prefixlen: %d\n",
8782	ip6_sprintf(prefix), prefix_len));
8783	one_set = `1`;
8784	}
8785
8786	out:
8787	if_inet6data_lock_done(ifp);
8788
8789	if (error == `0` && one_set != `0`)
8790	necp_update_all_clients();
8791
8792	return (error);
8793	}
8794
8795	int
8796	ifnet_get_nat64prefix(struct ifnet ifp, struct* ipv6_prefix *prefixes)
8797	{
8798	int i, found_one = `0`, error = `0`;
8799
8800	if (ifp == NULL)
8801	return (EINVAL);
8802
8803	if_inet6data_lock_shared(ifp);
8804
8805	if (IN6_IFEXTRA(ifp) == NULL) {
8806	error = ENOMEM;
8807	goto out;
8808	}
8809
8810	for (i = `0`; i < NAT64_MAX_NUM_PREFIXES; i++) {
8811	if (IN6_IFEXTRA(ifp)->nat64_prefixes[i].prefix_len != `0`)
8812	found_one = `1`;
8813	}
8814
8815	if (found_one == `0`) {
8816	error = ENOENT;
8817	goto out;
8818	}
8819
8820	if (prefixes)
8821	bcopy(IN6_IFEXTRA(ifp)->nat64_prefixes, prefixes,
8822	sizeof(IN6_IFEXTRA(ifp)->nat64_prefixes));
8823
8824	out:
8825	if_inet6data_lock_done(ifp);
8826
8827	return (error);
8828	}
8829	#endif
8830
8831	static void
8832	dlil_output_cksum_dbg(struct ifnet ifp, struct* mbuf *m, uint32_t hoff,
8833	protocol_family_t pf)
8834	{
8835	#pragma unused(ifp)
8836	uint32_t did_sw;
8837
8838	if (!(hwcksum_dbg_mode & HWCKSUM_DBG_FINALIZE_FORCED) \|\|
8839	(m->m_pkthdr.csum_flags & (CSUM_TSO_IPV4\|CSUM_TSO_IPV6)))
8840	return;
8841
8842	switch (pf) {
8843	case PF_INET:
8844	did_sw = in_finalize_cksum(m, hoff, m->m_pkthdr.csum_flags);
8845	if (did_sw & CSUM_DELAY_IP)
8846	hwcksum_dbg_finalized_hdr++;
8847	if (did_sw & CSUM_DELAY_DATA)
8848	hwcksum_dbg_finalized_data++;
8849	break;
8850	#if INET6
8851	case PF_INET6:
8852	/*
8853	* Checksum offload should not have been enabled when
8854	* extension headers exist; that also means that we
8855	* cannot force-finalize packets with extension headers.
8856	* Indicate to the callee should it skip such case by
8857	* setting optlen to -1.
8858	*/
8859	did_sw = in6_finalize_cksum(m, hoff, -`1`, -`1`,
8860	m->m_pkthdr.csum_flags);
8861	if (did_sw & CSUM_DELAY_IPV6_DATA)
8862	hwcksum_dbg_finalized_data++;
8863	break;
8864	#endif /* INET6 */
8865	default:
8866	return;
8867	}
8868	}
8869
8870	static void
8871	dlil_input_cksum_dbg(struct ifnet ifp, struct* mbuf m, char* *frame_header,
8872	protocol_family_t pf)
8873	{
8874	uint16_t sum = `0`;
8875	uint32_t hlen;
8876
8877	if (frame_header == NULL \|\|
8878	frame_header < (char *)mbuf_datastart(m) \|\|
8879	frame_header > (char *)m->m_data) {
8880	printf("%s: frame header pointer 0x%llx out of range "
8881	"[0x%llx,0x%llx] for mbuf 0x%llx\n", if_name(ifp),
8882	(uint64_t)VM_KERNEL_ADDRPERM(frame_header),
8883	(uint64_t)VM_KERNEL_ADDRPERM(mbuf_datastart(m)),
8884	(uint64_t)VM_KERNEL_ADDRPERM(m->m_data),
8885	(uint64_t)VM_KERNEL_ADDRPERM(m));
8886	return;
8887	}
8888	hlen = (m->m_data - frame_header);
8889
8890	switch (pf) {
8891	case PF_INET:
8892	#if INET6
8893	case PF_INET6:
8894	#endif /* INET6 */
8895	break;
8896	default:
8897	return;
8898	}
8899
8900	/*
8901	* Force partial checksum offload; useful to simulate cases
8902	* where the hardware does not support partial checksum offload,
8903	* in order to validate correctness throughout the layers above.
8904	*/
8905	if (hwcksum_dbg_mode & HWCKSUM_DBG_PARTIAL_FORCED) {
8906	uint32_t foff = hwcksum_dbg_partial_rxoff_forced;
8907
8908	if (foff > (uint32_t)m->m_pkthdr.len)
8909	return;
8910
8911	m->m_pkthdr.csum_flags &= ~CSUM_RX_FLAGS;
8912
8913	/ Compute 16-bit 1's complement sum from forced offset /
8914	sum = m_sum16(m, foff, (m->m_pkthdr.len - foff));
8915
8916	m->m_pkthdr.csum_flags \|= (CSUM_DATA_VALID \| CSUM_PARTIAL);
8917	m->m_pkthdr.csum_rx_val = sum;
8918	m->m_pkthdr.csum_rx_start = (foff + hlen);
8919
8920	hwcksum_dbg_partial_forced++;
8921	hwcksum_dbg_partial_forced_bytes += m->m_pkthdr.len;
8922	}
8923
8924	/*
8925	* Partial checksum offload verification (and adjustment);
8926	* useful to validate and test cases where the hardware
8927	* supports partial checksum offload.
8928	*/
8929	if ((m->m_pkthdr.csum_flags &
8930	(CSUM_DATA_VALID \| CSUM_PARTIAL \| CSUM_PSEUDO_HDR)) ==
8931	(CSUM_DATA_VALID \| CSUM_PARTIAL)) {
8932	uint32_t rxoff;
8933
8934	/ Start offset must begin after frame header /
8935	rxoff = m->m_pkthdr.csum_rx_start;
8936	if (hlen > rxoff) {
8937	hwcksum_dbg_bad_rxoff++;
8938	if (dlil_verbose) {
8939	printf("%s: partial cksum start offset %d "
8940	"is less than frame header length %d for "
8941	"mbuf 0x%llx\n", if_name(ifp), rxoff, hlen,
8942	(uint64_t)VM_KERNEL_ADDRPERM(m));
8943	}
8944	return;
8945	}
8946	rxoff -= hlen;
8947
8948	if (!(hwcksum_dbg_mode & HWCKSUM_DBG_PARTIAL_FORCED)) {
8949	/*
8950	* Compute the expected 16-bit 1's complement sum;
8951	* skip this if we've already computed it above
8952	* when partial checksum offload is forced.
8953	*/
8954	sum = m_sum16(m, rxoff, (m->m_pkthdr.len - rxoff));
8955
8956	/ Hardware or driver is buggy /
8957	if (sum != m->m_pkthdr.csum_rx_val) {
8958	hwcksum_dbg_bad_cksum++;
8959	if (dlil_verbose) {
8960	printf("%s: bad partial cksum value "
8961	"0x%x (expected 0x%x) for mbuf "
8962	"0x%llx [rx_start %d]\n",
8963	if_name(ifp),
8964	m->m_pkthdr.csum_rx_val, sum,
8965	(uint64_t)VM_KERNEL_ADDRPERM(m),
8966	m->m_pkthdr.csum_rx_start);
8967	}
8968	return;
8969	}
8970	}
8971	hwcksum_dbg_verified++;
8972
8973	/*
8974	* This code allows us to emulate various hardwares that
8975	* perform 16-bit 1's complement sum beginning at various
8976	* start offset values.
8977	*/
8978	if (hwcksum_dbg_mode & HWCKSUM_DBG_PARTIAL_RXOFF_ADJ) {
8979	uint32_t aoff = hwcksum_dbg_partial_rxoff_adj;
8980
8981	if (aoff == rxoff \|\| aoff > (uint32_t)m->m_pkthdr.len)
8982	return;
8983
8984	sum = m_adj_sum16(m, rxoff, aoff,
8985	m_pktlen(m) - aoff, sum);
8986
8987	m->m_pkthdr.csum_rx_val = sum;
8988	m->m_pkthdr.csum_rx_start = (aoff + hlen);
8989
8990	hwcksum_dbg_adjusted++;
8991	}
8992	}
8993	}
8994
8995	static int
8996	sysctl_hwcksum_dbg_mode SYSCTL_HANDLER_ARGS
8997	{
8998	#pragma unused(arg1, arg2)
8999	u_int32_t i;
9000	int err;
9001
9002	i = hwcksum_dbg_mode;
9003
9004	err = sysctl_handle_int(oidp, &i, `0`, req);
9005	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
9006	return (err);
9007
9008	if (hwcksum_dbg == `0`)
9009	return (ENODEV);
9010
9011	if ((i & ~HWCKSUM_DBG_MASK) != `0`)
9012	return (EINVAL);
9013
9014	hwcksum_dbg_mode = (i & HWCKSUM_DBG_MASK);
9015
9016	return (err);
9017	}
9018
9019	static int
9020	sysctl_hwcksum_dbg_partial_rxoff_forced SYSCTL_HANDLER_ARGS
9021	{
9022	#pragma unused(arg1, arg2)
9023	u_int32_t i;
9024	int err;
9025
9026	i = hwcksum_dbg_partial_rxoff_forced;
9027
9028	err = sysctl_handle_int(oidp, &i, `0`, req);
9029	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
9030	return (err);
9031
9032	if (!(hwcksum_dbg_mode & HWCKSUM_DBG_PARTIAL_FORCED))
9033	return (ENODEV);
9034
9035	hwcksum_dbg_partial_rxoff_forced = i;
9036
9037	return (err);
9038	}
9039
9040	static int
9041	sysctl_hwcksum_dbg_partial_rxoff_adj SYSCTL_HANDLER_ARGS
9042	{
9043	#pragma unused(arg1, arg2)
9044	u_int32_t i;
9045	int err;
9046
9047	i = hwcksum_dbg_partial_rxoff_adj;
9048
9049	err = sysctl_handle_int(oidp, &i, `0`, req);
9050	if (err != `0` \|\| req->newptr == USER_ADDR_NULL)
9051	return (err);
9052
9053	if (!(hwcksum_dbg_mode & HWCKSUM_DBG_PARTIAL_RXOFF_ADJ))
9054	return (ENODEV);
9055
9056	hwcksum_dbg_partial_rxoff_adj = i;
9057
9058	return (err);
9059	}
9060
9061	static int
9062	sysctl_tx_chain_len_stats SYSCTL_HANDLER_ARGS
9063	{
9064	#pragma unused(oidp, arg1, arg2)
9065	int err;
9066
9067	if (req->oldptr == USER_ADDR_NULL) {
9068
9069	}
9070	if (req->newptr != USER_ADDR_NULL) {
9071	return (EPERM);
9072	}
9073	err = SYSCTL_OUT(req, &tx_chain_len_stats,
9074	sizeof(struct chain_len_stats));
9075
9076	return (err);
9077	}
9078
9079
9080	#if DEBUG \|\| DEVELOPMENT
9081	/ Blob for sum16 verification /
9082	static uint8_t sumdata[] = {
9083	`0x1f`, `0x8b`, `0x08`, `0x08`, `0x4c`, `0xe5`, `0x9a`, `0x4f`, `0x00`, `0x03`,
9084	`0x5f`, `0x00`, `0x5d`, `0x91`, `0x41`, `0x4e`, `0xc4`, `0x30`, `0x0c`, `0x45`,
9085	`0xf7`, `0x9c`, `0xc2`, `0x07`, `0x18`, `0xf5`, `0x0e`, `0xb0`, `0xe2`, `0x00`,
9086	`0x48`, `0x88`, `0xa5`, `0xdb`, `0xba`, `0x49`, `0x34`, `0x69`, `0xdc`, `0x71`,
9087	`0x92`, `0xa9`, `0xc2`, `0x8a`, `0x6b`, `0x70`, `0x3d`, `0x4e`, `0x82`, `0x93`,
9088	`0xb4`, `0x08`, `0xd8`, `0xc5`, `0xb1`, `0xfd`, `0xff`, `0xb3`, `0xfd`, `0x4c`,
9089	`0x42`, `0x5f`, `0x1f`, `0x9f`, `0x11`, `0x12`, `0x43`, `0xb2`, `0x04`, `0x93`,
9090	`0xe0`, `0x7b`, `0x01`, `0x0e`, `0x14`, `0x07`, `0x78`, `0xd1`, `0x78`, `0x75`,
9091	`0x71`, `0x71`, `0xe9`, `0x08`, `0x84`, `0x46`, `0xf2`, `0xc7`, `0x3b`, `0x09`,
9092	`0xe7`, `0xd1`, `0xd3`, `0x8a`, `0x57`, `0x92`, `0x33`, `0xcd`, `0x39`, `0xcc`,
9093	`0xb0`, `0x91`, `0x89`, `0xe0`, `0x42`, `0x53`, `0x8b`, `0xb7`, `0x8c`, `0x42`,
9094	`0x60`, `0xd9`, `0x9f`, `0x7a`, `0x55`, `0x19`, `0x76`, `0xcb`, `0x10`, `0x49`,
9095	`0x35`, `0xac`, `0x0b`, `0x5a`, `0x3c`, `0xbb`, `0x65`, `0x51`, `0x8c`, `0x90`,
9096	`0x7c`, `0x69`, `0x45`, `0x45`, `0x81`, `0xb4`, `0x2b`, `0x70`, `0x82`, `0x85`,
9097	`0x55`, `0x91`, `0x17`, `0x90`, `0xdc`, `0x14`, `0x1e`, `0x35`, `0x52`, `0xdd`,
9098	`0x02`, `0x16`, `0xef`, `0xb5`, `0x40`, `0x89`, `0xe2`, `0x46`, `0x53`, `0xad`,
9099	`0x93`, `0x6e`, `0x98`, `0x30`, `0xe5`, `0x08`, `0xb7`, `0xcc`, `0x03`, `0xbc`,
9100	`0x71`, `0x86`, `0x09`, `0x43`, `0x0d`, `0x52`, `0xf5`, `0xa2`, `0xf5`, `0xa2`,
9101	`0x56`, `0x11`, `0x8d`, `0xa8`, `0xf5`, `0xee`, `0x92`, `0x3d`, `0xfe`, `0x8c`,
9102	`0x67`, `0x71`, `0x8b`, `0x0e`, `0x2d`, `0x70`, `0x77`, `0xbe`, `0xbe`, `0xea`,
9103	`0xbf`, `0x9a`, `0x8d`, `0x9c`, `0x53`, `0x53`, `0xe5`, `0xe0`, `0x4b`, `0x87`,
9104	`0x85`, `0xd2`, `0x45`, `0x95`, `0x30`, `0xc1`, `0xcc`, `0xe0`, `0x74`, `0x54`,
9105	`0x13`, `0x58`, `0xe8`, `0xe8`, `0x79`, `0xa2`, `0x09`, `0x73`, `0xa4`, `0x0e`,
9106	`0x39`, `0x59`, `0x0c`, `0xe6`, `0x9c`, `0xb2`, `0x4f`, `0x06`, `0x5b`, `0x8e`,
9107	`0xcd`, `0x17`, `0x6c`, `0x5e`, `0x95`, `0x4d`, `0x70`, `0xa2`, `0x0a`, `0xbf`,
9108	`0xa3`, `0xcc`, `0x03`, `0xbc`, `0x5a`, `0xe7`, `0x75`, `0x06`, `0x5e`, `0x75`,
9109	`0xef`, `0x58`, `0x8e`, `0x15`, `0xd1`, `0x0a`, `0x18`, `0xff`, `0xdd`, `0xe6`,
9110	`0x02`, `0x3b`, `0xb5`, `0xb4`, `0xa1`, `0xe0`, `0x72`, `0xfc`, `0xe3`, `0xab`,
9111	`0x07`, `0xe0`, `0x4d`, `0x65`, `0xea`, `0x92`, `0xeb`, `0xf2`, `0x7b`, `0x17`,
9112	`0x05`, `0xce`, `0xc6`, `0xf6`, `0x2b`, `0xbb`, `0x70`, `0x3d`, `0x00`, `0x95`,
9113	`0xe0`, `0x07`, `0x52`, `0x3b`, `0x58`, `0xfc`, `0x7c`, `0x69`, `0x4d`, `0xe9`,
9114	`0xf7`, `0xa9`, `0x66`, `0x1e`, `0x1e`, `0xbe`, `0x01`, `0x69`, `0x98`, `0xfe`,
9115	`0xc8`, `0x28`, `0x02`, `0x00`, `0x00`
9116	};
9117
9118	/ Precomputed 16-bit 1's complement sums for various spans of the above data /
9119	static struct {
9120	boolean_t init;
9121	uint16_t len;
9122	uint16_t sumr; / reference /
9123	uint16_t sumrp; / reference, precomputed /
9124	} sumtbl[] = {
9125	{ FALSE, `0`, `0`, `0x0000` },
9126	{ FALSE, `1`, `0`, `0x001f` },
9127	{ FALSE, `2`, `0`, `0x8b1f` },
9128	{ FALSE, `3`, `0`, `0x8b27` },
9129	{ FALSE, `7`, `0`, `0x790e` },
9130	{ FALSE, `11`, `0`, `0xcb6d` },
9131	{ FALSE, `20`, `0`, `0x20dd` },
9132	{ FALSE, `27`, `0`, `0xbabd` },
9133	{ FALSE, `32`, `0`, `0xf3e8` },
9134	{ FALSE, `37`, `0`, `0x197d` },
9135	{ FALSE, `43`, `0`, `0x9eae` },
9136	{ FALSE, `64`, `0`, `0x4678` },
9137	{ FALSE, `127`, `0`, `0x9399` },
9138	{ FALSE, `256`, `0`, `0xd147` },
9139	{ FALSE, `325`, `0`, `0x0358` },
9140	};
9141	#define SUMTBL_MAX ((int)sizeof (sumtbl) / (int)sizeof (sumtbl[0]))
9142
9143	static void
9144	dlil_verify_sum16(void)
9145	{
9146	struct mbuf *m;
9147	uint8_t *buf;
9148	int n;
9149
9150	/ Make sure test data plus extra room for alignment fits in cluster /
9151	_CASSERT((sizeof (sumdata) + (sizeof (uint64_t) * `2`)) <= MCLBYTES);
9152
9153	kprintf("DLIL: running SUM16 self-tests ... ");
9154
9155	m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
9156	m_align(m, sizeof(sumdata) + (sizeof (uint64_t) * `2`));
9157
9158	buf = mtod(m, uint8_t ); /* base address /
9159
9160	for (n = `0`; n < SUMTBL_MAX; n++) {
9161	uint16_t len = sumtbl[n].len;
9162	int i;
9163
9164	/ Verify for all possible alignments /
9165	for (i = `0`; i < (int)sizeof (uint64_t); i++) {
9166	uint16_t sum, sumr;
9167	uint8_t *c;
9168
9169	/ Copy over test data to mbuf /
9170	VERIFY(len <= sizeof (sumdata));
9171	c = buf + i;
9172	bcopy(sumdata, c, len);
9173
9174	/ Zero-offset test (align by data pointer) /
9175	m->m_data = (caddr_t)c;
9176	m->m_len = len;
9177	sum = m_sum16(m, `0`, len);
9178
9179	if (!sumtbl[n].init) {
9180	sumr = in_cksum_mbuf_ref(m, len, `0`, `0`);
9181	sumtbl[n].sumr = sumr;
9182	sumtbl[n].init = TRUE;
9183	} else {
9184	sumr = sumtbl[n].sumr;
9185	}
9186
9187	/ Something is horribly broken; stop now /
9188	if (sumr != sumtbl[n].sumrp) {
9189	panic_plain("\n%s: broken in_cksum_mbuf_ref() "
9190	"for len=%d align=%d sum=0x%04x "
9191	"[expected=0x%04x]\n", __func__,
9192	len, i, sum, sumr);
9193	/ NOTREACHED /
9194	} else if (sum != sumr) {
9195	panic_plain("\n%s: broken m_sum16() for len=%d "
9196	"align=%d sum=0x%04x [expected=0x%04x]\n",
9197	__func__, len, i, sum, sumr);
9198	/ NOTREACHED /
9199	}
9200
9201	/ Alignment test by offset (fixed data pointer) /
9202	m->m_data = (caddr_t)buf;
9203	m->m_len = i + len;
9204	sum = m_sum16(m, i, len);
9205
9206	/ Something is horribly broken; stop now /
9207	if (sum != sumr) {
9208	panic_plain("\n%s: broken m_sum16() for len=%d "
9209	"offset=%d sum=0x%04x [expected=0x%04x]\n",
9210	__func__, len, i, sum, sumr);
9211	/ NOTREACHED /
9212	}
9213	#if INET
9214	/ Simple sum16 contiguous buffer test by aligment /
9215	sum = b_sum16(c, len);
9216
9217	/ Something is horribly broken; stop now /
9218	if (sum != sumr) {
9219	panic_plain("\n%s: broken b_sum16() for len=%d "
9220	"align=%d sum=0x%04x [expected=0x%04x]\n",
9221	__func__, len, i, sum, sumr);
9222	/ NOTREACHED /
9223	}
9224	#endif /* INET */
9225	}
9226	}
9227	m_freem(m);
9228
9229	kprintf("PASSED\n");
9230	}
9231	#endif /* DEBUG \|\| DEVELOPMENT */
9232
9233	#define CASE_STRINGIFY(x) case x: return #x
9234
9235	__private_extern__ const char *
9236	dlil_kev_dl_code_str(u_int32_t event_code)
9237	{
9238	switch (event_code) {
9239	CASE_STRINGIFY(KEV_DL_SIFFLAGS);
9240	CASE_STRINGIFY(KEV_DL_SIFMETRICS);
9241	CASE_STRINGIFY(KEV_DL_SIFMTU);
9242	CASE_STRINGIFY(KEV_DL_SIFPHYS);
9243	CASE_STRINGIFY(KEV_DL_SIFMEDIA);
9244	CASE_STRINGIFY(KEV_DL_SIFGENERIC);
9245	CASE_STRINGIFY(KEV_DL_ADDMULTI);
9246	CASE_STRINGIFY(KEV_DL_DELMULTI);
9247	CASE_STRINGIFY(KEV_DL_IF_ATTACHED);
9248	CASE_STRINGIFY(KEV_DL_IF_DETACHING);
9249	CASE_STRINGIFY(KEV_DL_IF_DETACHED);
9250	CASE_STRINGIFY(KEV_DL_LINK_OFF);
9251	CASE_STRINGIFY(KEV_DL_LINK_ON);
9252	CASE_STRINGIFY(KEV_DL_PROTO_ATTACHED);
9253	CASE_STRINGIFY(KEV_DL_PROTO_DETACHED);
9254	CASE_STRINGIFY(KEV_DL_LINK_ADDRESS_CHANGED);
9255	CASE_STRINGIFY(KEV_DL_WAKEFLAGS_CHANGED);
9256	CASE_STRINGIFY(KEV_DL_IF_IDLE_ROUTE_REFCNT);
9257	CASE_STRINGIFY(KEV_DL_IFCAP_CHANGED);
9258	CASE_STRINGIFY(KEV_DL_LINK_QUALITY_METRIC_CHANGED);
9259	CASE_STRINGIFY(KEV_DL_NODE_PRESENCE);
9260	CASE_STRINGIFY(KEV_DL_NODE_ABSENCE);
9261	CASE_STRINGIFY(KEV_DL_MASTER_ELECTED);
9262	CASE_STRINGIFY(KEV_DL_ISSUES);
9263	CASE_STRINGIFY(KEV_DL_IFDELEGATE_CHANGED);
9264	default:
9265	break;
9266	}
9267	return ("");
9268	}
9269
9270	static void
9271	dlil_dt_tcall_fn(thread_call_param_t arg0, thread_call_param_t arg1)
9272	{
9273	#pragma unused(arg1)
9274	struct ifnet *ifp = arg0;
9275
9276	if (ifnet_is_attached(ifp, `1`)) {
9277	nstat_ifnet_threshold_reached(ifp->if_index);
9278	ifnet_decr_iorefcnt(ifp);
9279	}
9280	}
9281
9282	void
9283	ifnet_notify_data_threshold(struct ifnet *ifp)
9284	{
9285	uint64_t bytes = (ifp->if_ibytes + ifp->if_obytes);
9286	uint64_t oldbytes = ifp->if_dt_bytes;
9287
9288	ASSERT(ifp->if_dt_tcall != NULL);
9289
9290	/*
9291	* If we went over the threshold, notify NetworkStatistics.
9292	* We rate-limit it based on the threshold interval value.
9293	*/
9294	if (threshold_notify && (bytes - oldbytes) > ifp->if_data_threshold &&
9295	OSCompareAndSwap64(oldbytes, bytes, &ifp->if_dt_bytes) &&
9296	!thread_call_isactive(ifp->if_dt_tcall)) {
9297	uint64_t tival = (threshold_interval * NSEC_PER_SEC);
9298	uint64_t now = mach_absolute_time(), deadline = now;
9299	uint64_t ival;
9300
9301	if (tival != `0`) {
9302	nanoseconds_to_absolutetime(tival, &ival);
9303	clock_deadline_for_periodic_event(ival, now, &deadline);
9304	(void) thread_call_enter_delayed(ifp->if_dt_tcall,
9305	deadline);
9306	} else {
9307	(void) thread_call_enter(ifp->if_dt_tcall);
9308	}
9309	}
9310	}
9311
9312	#if (DEVELOPMENT \|\| DEBUG)
9313	/*
9314	* The sysctl variable name contains the input parameters of
9315	* ifnet_get_keepalive_offload_frames()
9316	* ifp (interface index): name[0]
9317	* frames_array_count: name[1]
9318	* frame_data_offset: name[2]
9319	* The return length gives used_frames_count
9320	*/
9321	static int
9322	sysctl_get_kao_frames SYSCTL_HANDLER_ARGS
9323	{
9324	#pragma unused(oidp)
9325	int name = (int* *)arg1;
9326	u_int namelen = arg2;
9327	int idx;
9328	ifnet_t ifp = NULL;
9329	u_int32_t frames_array_count;
9330	size_t frame_data_offset;
9331	u_int32_t used_frames_count;
9332	struct ifnet_keepalive_offload_frame *frames_array = NULL;
9333	int error = `0`;
9334	u_int32_t i;
9335
9336	/*
9337	* Only root can get look at other people TCP frames
9338	*/
9339	error = proc_suser(current_proc());
9340	if (error != `0`)
9341	goto done;
9342	/*
9343	* Validate the input parameters
9344	*/
9345	if (req->newptr != USER_ADDR_NULL) {
9346	error = EPERM;
9347	goto done;
9348	}
9349	if (namelen != `3`) {
9350	error = EINVAL;
9351	goto done;
9352	}
9353	if (req->oldptr == USER_ADDR_NULL) {
9354	error = EINVAL;
9355	goto done;
9356	}
9357	if (req->oldlen == `0`) {
9358	error = EINVAL;
9359	goto done;
9360	}
9361	idx = name[`0`];
9362	frames_array_count = name[`1`];
9363	frame_data_offset = name[`2`];
9364
9365	/ Make sure the passed buffer is large enough /
9366	if (frames_array_count * sizeof(struct ifnet_keepalive_offload_frame) >
9367	req->oldlen) {
9368	error = ENOMEM;
9369	goto done;
9370	}
9371
9372	ifnet_head_lock_shared();
9373	if (!IF_INDEX_IN_RANGE(idx)) {
9374	ifnet_head_done();
9375	error = ENOENT;
9376	goto done;
9377	}
9378	ifp = ifindex2ifnet[idx];
9379	ifnet_head_done();
9380
9381	frames_array = _MALLOC(frames_array_count *
9382	sizeof(struct ifnet_keepalive_offload_frame), M_TEMP, M_WAITOK);
9383	if (frames_array == NULL) {
9384	error = ENOMEM;
9385	goto done;
9386	}
9387
9388	error = ifnet_get_keepalive_offload_frames(ifp, frames_array,
9389	frames_array_count, frame_data_offset, &used_frames_count);
9390	if (error != `0`) {
9391	printf("%s: ifnet_get_keepalive_offload_frames error %d\n",
9392	__func__, error);
9393	goto done;
9394	}
9395
9396	for (i = `0`; i < used_frames_count; i++) {
9397	error = SYSCTL_OUT(req, frames_array + i,
9398	sizeof(struct ifnet_keepalive_offload_frame));
9399	if (error != `0`) {
9400	goto done;
9401	}
9402	}
9403	done:
9404	if (frames_array != NULL)
9405	_FREE(frames_array, M_TEMP);
9406	return (error);
9407	}
9408	#endif /* DEVELOPMENT \|\| DEBUG */
9409
9410	void
9411	ifnet_update_stats_per_flow(struct ifnet_stats_per_flow *ifs,
9412	struct ifnet *ifp)
9413	{
9414	tcp_update_stats_per_flow(ifs, ifp);
9415	}
9416
9417	static void
9418	dlil_mit_tcall_fn(thread_call_param_t arg0, thread_call_param_t arg1)
9419	{
9420	#pragma unused(arg1)
9421	struct ifnet ifp = (struct* ifnet *)arg0;
9422	struct dlil_threading_info *inp = ifp->if_inp;
9423
9424	ifnet_lock_shared(ifp);
9425	if (!IF_FULLY_ATTACHED(ifp) \|\| inp == NULL) {
9426	ifnet_lock_done(ifp);
9427	return;
9428	}
9429
9430	lck_mtx_lock_spin(&inp->input_lck);
9431	inp->input_waiting \|= DLIL_INPUT_WAITING;
9432	if (!(inp->input_waiting & DLIL_INPUT_RUNNING) \|\|
9433	!qempty(&inp->rcvq_pkts)) {
9434	inp->wtot++;
9435	wakeup_one((caddr_t)&inp->input_waiting);
9436	}
9437	lck_mtx_unlock(&inp->input_lck);
9438	ifnet_lock_done(ifp);
9439	}
9440

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