1/*
2 * Copyright (c) 1985
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
32 *
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 * SOFTWARE.
48 */
49
50/*
51 * Portions Copyright (c) 1995 by International Business Machines, Inc.
52 *
53 * International Business Machines, Inc. (hereinafter called IBM) grants
54 * permission under its copyrights to use, copy, modify, and distribute this
55 * Software with or without fee, provided that the above copyright notice and
56 * all paragraphs of this notice appear in all copies, and that the name of IBM
57 * not be used in connection with the marketing of any product incorporating
58 * the Software or modifications thereof, without specific, written prior
59 * permission.
60 *
61 * To the extent it has a right to do so, IBM grants an immunity from suit
62 * under its patents, if any, for the use, sale or manufacture of products to
63 * the extent that such products are used for performing Domain Name System
64 * dynamic updates in TCP/IP networks by means of the Software. No immunity is
65 * granted for any product per se or for any other function of any product.
66 *
67 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
68 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
69 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
70 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
71 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
72 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
73 */
74
75/*
76 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
77 *
78 * Permission to use, copy, modify, and distribute this software for any
79 * purpose with or without fee is hereby granted, provided that the above
80 * copyright notice and this permission notice appear in all copies.
81 *
82 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
83 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
84 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
85 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
86 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
87 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
88 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
89 * SOFTWARE.
90 */
91
92#include <sys/types.h>
93#include <sys/param.h>
94#include <sys/socket.h>
95
96#include <netinet/in.h>
97#include <arpa/inet.h>
98#include <arpa/nameser.h>
99
100#include <ctype.h>
101#include <errno.h>
102#include <math.h>
103#include <netdb.h>
104#include <resolv/resolv-internal.h>
105#include <stdio.h>
106#include <stdlib.h>
107#include <string.h>
108#include <time.h>
109#include <shlib-compat.h>
110#include <libc-diag.h>
111
112#ifdef SPRINTF_CHAR
113# define SPRINTF(x) strlen(sprintf/**/x)
114#else
115# define SPRINTF(x) sprintf x
116#endif
117
118extern const char *_res_sectioncodes[] attribute_hidden;
119
120/* _res_opcodes was exported by accident as a variable. */
121#if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_26)
122static const char *res_opcodes[] =
123#else
124static const char res_opcodes[][9] =
125#endif
126 {
127 "QUERY",
128 "IQUERY",
129 "CQUERYM",
130 "CQUERYU", /* experimental */
131 "NOTIFY", /* experimental */
132 "UPDATE",
133 "6",
134 "7",
135 "8",
136 "9",
137 "10",
138 "11",
139 "12",
140 "13",
141 "ZONEINIT",
142 "ZONEREF",
143 };
144#if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_26)
145strong_alias (res_opcodes, _res_opcodes)
146#endif
147
148static const char *p_section(int section, int opcode);
149
150/*
151 * Print the current options.
152 */
153void
154fp_resstat(const res_state statp, FILE *file) {
155 u_long mask;
156
157 fprintf(file, ";; res options:");
158 for (mask = 1; mask != 0; mask <<= 1)
159 if (statp->options & mask)
160 fprintf(file, " %s", p_option(mask));
161 putc('\n', file);
162}
163
164static void
165do_section (int pfcode, ns_msg *handle, ns_sect section, int pflag, FILE *file)
166{
167 int n, sflag, rrnum;
168 static int buflen = 2048;
169 char *buf;
170 ns_opcode opcode;
171 ns_rr rr;
172
173 /*
174 * Print answer records.
175 */
176 sflag = (pfcode & pflag);
177 if (pfcode && !sflag)
178 return;
179
180 buf = malloc(buflen);
181 if (buf == NULL) {
182 fprintf(file, ";; memory allocation failure\n");
183 return;
184 }
185
186 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
187 rrnum = 0;
188 for (;;) {
189 if (ns_parserr(handle, section, rrnum, &rr)) {
190 if (errno != ENODEV)
191 fprintf(file, ";; ns_parserr: %s\n",
192 strerror(errno));
193 else if (rrnum > 0 && sflag != 0 &&
194 (pfcode & RES_PRF_HEAD1))
195 putc('\n', file);
196 goto cleanup;
197 }
198 if (rrnum == 0 && sflag != 0 && (pfcode & RES_PRF_HEAD1))
199 fprintf(file, ";; %s SECTION:\n",
200 p_section(section, opcode));
201 if (section == ns_s_qd)
202 fprintf(file, ";;\t%s, type = %s, class = %s\n",
203 ns_rr_name(rr),
204 p_type(ns_rr_type(rr)),
205 p_class(ns_rr_class(rr)));
206 else {
207 n = ns_sprintrr(handle, &rr, NULL, NULL,
208 buf, buflen);
209 if (n < 0) {
210 if (errno == ENOSPC) {
211 free(buf);
212 buf = NULL;
213 if (buflen < 131072)
214 buf = malloc(buflen += 1024);
215 if (buf == NULL) {
216 fprintf(file,
217 ";; memory allocation failure\n");
218 return;
219 }
220 continue;
221 }
222 fprintf(file, ";; ns_sprintrr: %s\n",
223 strerror(errno));
224 goto cleanup;
225 }
226 fputs(buf, file);
227 fputc('\n', file);
228 }
229 rrnum++;
230 }
231 cleanup:
232 free(buf);
233}
234
235/*
236 * Print the contents of a query.
237 * This is intended to be primarily a debugging routine.
238 */
239void
240fp_nquery (const unsigned char *msg, int len, FILE *file)
241{
242 ns_msg handle;
243 int qdcount, ancount, nscount, arcount;
244 u_int opcode, rcode, id;
245
246 /* There is no need to initialize _res: If _res is not yet
247 initialized, _res.pfcode is zero. But initialization will
248 leave it at zero, too. _res.pfcode is an unsigned long,
249 but the code here assumes that the flags fit into an int,
250 so use that. */
251 int pfcode = _res.pfcode;
252
253 if (ns_initparse(msg, len, &handle) < 0) {
254 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
255 return;
256 }
257 opcode = ns_msg_getflag(handle, ns_f_opcode);
258 rcode = ns_msg_getflag(handle, ns_f_rcode);
259 id = ns_msg_id(handle);
260 qdcount = ns_msg_count(handle, ns_s_qd);
261 ancount = ns_msg_count(handle, ns_s_an);
262 nscount = ns_msg_count(handle, ns_s_ns);
263 arcount = ns_msg_count(handle, ns_s_ar);
264
265 /*
266 * Print header fields.
267 */
268 if ((!pfcode) || (pfcode & RES_PRF_HEADX) || rcode)
269 fprintf(file,
270 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
271 res_opcodes[opcode], p_rcode(rcode), id);
272 if ((!pfcode) || (pfcode & RES_PRF_HEADX))
273 putc(';', file);
274 if ((!pfcode) || (pfcode & RES_PRF_HEAD2)) {
275 fprintf(file, "; flags:");
276 if (ns_msg_getflag(handle, ns_f_qr))
277 fprintf(file, " qr");
278 if (ns_msg_getflag(handle, ns_f_aa))
279 fprintf(file, " aa");
280 if (ns_msg_getflag(handle, ns_f_tc))
281 fprintf(file, " tc");
282 if (ns_msg_getflag(handle, ns_f_rd))
283 fprintf(file, " rd");
284 if (ns_msg_getflag(handle, ns_f_ra))
285 fprintf(file, " ra");
286 if (ns_msg_getflag(handle, ns_f_z))
287 fprintf(file, " ??");
288 if (ns_msg_getflag(handle, ns_f_ad))
289 fprintf(file, " ad");
290 if (ns_msg_getflag(handle, ns_f_cd))
291 fprintf(file, " cd");
292 }
293 if ((!pfcode) || (pfcode & RES_PRF_HEAD1)) {
294 fprintf(file, "; %s: %d",
295 p_section(ns_s_qd, opcode), qdcount);
296 fprintf(file, ", %s: %d",
297 p_section(ns_s_an, opcode), ancount);
298 fprintf(file, ", %s: %d",
299 p_section(ns_s_ns, opcode), nscount);
300 fprintf(file, ", %s: %d",
301 p_section(ns_s_ar, opcode), arcount);
302 }
303 if ((!pfcode) || (pfcode &
304 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
305 putc('\n',file);
306 }
307 /*
308 * Print the various sections.
309 */
310 do_section (pfcode, &handle, ns_s_qd, RES_PRF_QUES, file);
311 do_section (pfcode, &handle, ns_s_an, RES_PRF_ANS, file);
312 do_section (pfcode, &handle, ns_s_ns, RES_PRF_AUTH, file);
313 do_section (pfcode, &handle, ns_s_ar, RES_PRF_ADD, file);
314 if (qdcount == 0 && ancount == 0 &&
315 nscount == 0 && arcount == 0)
316 putc('\n', file);
317}
318libresolv_hidden_def (fp_nquery)
319
320void
321fp_query (const unsigned char *msg, FILE *file)
322{
323 fp_nquery (msg, PACKETSZ, file);
324}
325libresolv_hidden_def (fp_query)
326
327void
328p_query (const unsigned char *msg)
329{
330 fp_query (msg, stdout);
331}
332
333const u_char *
334p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
335 char name[MAXDNAME];
336 int n;
337
338 if ((n = __libc_dn_expand (msg, msg + len, cp, name, sizeof name)) < 0)
339 return (NULL);
340 if (name[0] == '\0')
341 putc('.', file);
342 else
343 fputs(name, file);
344 return (cp + n);
345}
346libresolv_hidden_def (p_cdnname)
347
348const u_char *
349p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
350 return (p_cdnname(cp, msg, PACKETSZ, file));
351}
352
353/* Return a fully-qualified domain name from a compressed name (with
354 length supplied). */
355
356const u_char *
357p_fqnname (const u_char *cp, const u_char *msg, int msglen, char *name,
358 int namelen)
359{
360 int n, newlen;
361
362 if ((n = __libc_dn_expand (msg, cp + msglen, cp, name, namelen)) < 0)
363 return (NULL);
364 newlen = strlen(name);
365 if (newlen == 0 || name[newlen - 1] != '.') {
366 if (newlen + 1 >= namelen) /* Lack space for final dot */
367 return (NULL);
368 else
369 strcpy(name + newlen, ".");
370 }
371 return (cp + n);
372}
373libresolv_hidden_def (p_fqnname)
374
375/* XXX: the rest of these functions need to become length-limited, too. */
376
377const u_char *
378p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
379 char name[MAXDNAME];
380 const u_char *n;
381
382 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
383 if (n == NULL)
384 return (NULL);
385 fputs(name, file);
386 return (n);
387}
388
389/*
390 * Names of RR classes and qclasses. Classes and qclasses are the same, except
391 * that C_ANY is a qclass but not a class. (You can ask for records of class
392 * C_ANY, but you can't have any records of that class in the database.)
393 */
394extern const struct res_sym __p_class_syms[];
395libresolv_hidden_proto (__p_class_syms)
396const struct res_sym __p_class_syms[] = {
397 {C_IN, (char *) "IN"},
398 {C_CHAOS, (char *) "CHAOS"},
399 {C_HS, (char *) "HS"},
400 {C_HS, (char *) "HESIOD"},
401 {C_ANY, (char *) "ANY"},
402 {C_NONE, (char *) "NONE"},
403 {C_IN, NULL, NULL}
404};
405libresolv_hidden_data_def (__p_class_syms)
406
407/*
408 * Names of message sections.
409 */
410const struct res_sym __p_default_section_syms[] attribute_hidden = {
411 {ns_s_qd, (char *) "QUERY"},
412 {ns_s_an, (char *) "ANSWER"},
413 {ns_s_ns, (char *) "AUTHORITY"},
414 {ns_s_ar, (char *) "ADDITIONAL"},
415 {0, NULL, NULL}
416};
417
418const struct res_sym __p_update_section_syms[] attribute_hidden = {
419 {S_ZONE, (char *) "ZONE"},
420 {S_PREREQ, (char *) "PREREQUISITE"},
421 {S_UPDATE, (char *) "UPDATE"},
422 {S_ADDT, (char *) "ADDITIONAL"},
423 {0, NULL, NULL}
424};
425
426/*
427 * Names of RR types and qtypes. The list is incomplete because its
428 * size is part of the ABI.
429 */
430extern const struct res_sym __p_type_syms[];
431libresolv_hidden_proto (__p_type_syms)
432const struct res_sym __p_type_syms[] = {
433 {ns_t_a, (char *) "A", (char *) "address"},
434 {ns_t_ns, (char *) "NS", (char *) "name server"},
435 {ns_t_md, (char *) "MD", (char *) "mail destination (deprecated)"},
436 {ns_t_mf, (char *) "MF", (char *) "mail forwarder (deprecated)"},
437 {ns_t_cname, (char *) "CNAME", (char *) "canonical name"},
438 {ns_t_soa, (char *) "SOA", (char *) "start of authority"},
439 {ns_t_mb, (char *) "MB", (char *) "mailbox"},
440 {ns_t_mg, (char *) "MG", (char *) "mail group member"},
441 {ns_t_mr, (char *) "MR", (char *) "mail rename"},
442 {ns_t_null, (char *) "NULL", (char *) "null"},
443 {ns_t_wks, (char *) "WKS", (char *) "well-known service (deprecated)"},
444 {ns_t_ptr, (char *) "PTR", (char *) "domain name pointer"},
445 {ns_t_hinfo, (char *) "HINFO", (char *) "host information"},
446 {ns_t_minfo, (char *) "MINFO", (char *) "mailbox information"},
447 {ns_t_mx, (char *) "MX", (char *) "mail exchanger"},
448 {ns_t_txt, (char *) "TXT", (char *) "text"},
449 {ns_t_rp, (char *) "RP", (char *) "responsible person"},
450 {ns_t_afsdb, (char *) "AFSDB", (char *) "DCE or AFS server"},
451 {ns_t_x25, (char *) "X25", (char *) "X25 address"},
452 {ns_t_isdn, (char *) "ISDN", (char *) "ISDN address"},
453 {ns_t_rt, (char *) "RT", (char *) "router"},
454 {ns_t_nsap, (char *) "NSAP", (char *) "nsap address"},
455 {ns_t_nsap_ptr, (char *) "NSAP_PTR", (char *) "domain name pointer"},
456 {ns_t_sig, (char *) "SIG", (char *) "signature"},
457 {ns_t_key, (char *) "KEY", (char *) "key"},
458 {ns_t_px, (char *) "PX", (char *) "mapping information"},
459 {ns_t_gpos, (char *) "GPOS",
460 (char *) "geographical position (withdrawn)"},
461 {ns_t_aaaa, (char *) "AAAA", (char *) "IPv6 address"},
462 {ns_t_loc, (char *) "LOC", (char *) "location"},
463 {ns_t_nxt, (char *) "NXT", (char *) "next valid name (unimplemented)"},
464 {ns_t_eid, (char *) "EID", (char *) "endpoint identifier (unimplemented)"},
465 {ns_t_nimloc, (char *) "NIMLOC", (char *) "NIMROD locator (unimplemented)"},
466 {ns_t_srv, (char *) "SRV", (char *) "server selection"},
467 {ns_t_atma, (char *) "ATMA", (char *) "ATM address (unimplemented)"},
468 {ns_t_dname, (char *) "DNAME", (char *) "Non-terminal DNAME (for IPv6)"},
469 {ns_t_tsig, (char *) "TSIG", (char *) "transaction signature"},
470 {ns_t_ixfr, (char *) "IXFR", (char *) "incremental zone transfer"},
471 {ns_t_axfr, (char *) "AXFR", (char *) "zone transfer"},
472 {ns_t_mailb, (char *) "MAILB", (char *) "mailbox-related data (deprecated)"},
473 {ns_t_maila, (char *) "MAILA", (char *) "mail agent (deprecated)"},
474 {ns_t_naptr, (char *) "NAPTR", (char *) "URN Naming Authority"},
475 {ns_t_kx, (char *) "KX", (char *) "Key Exchange"},
476 {ns_t_cert, (char *) "CERT", (char *) "Certificate"},
477 {ns_t_any, (char *) "ANY", (char *) "\"any\""},
478 {0, NULL, NULL}, /* Padding to preserve ABI. */
479 {0, NULL, NULL}
480};
481libresolv_hidden_data_def (__p_type_syms)
482
483/*
484 * Names of DNS rcodes.
485 */
486const struct res_sym __p_rcode_syms[] attribute_hidden = {
487 {ns_r_noerror, (char *) "NOERROR", (char *) "no error"},
488 {ns_r_formerr, (char *) "FORMERR", (char *) "format error"},
489 {ns_r_servfail, (char *) "SERVFAIL", (char *) "server failed"},
490 {ns_r_nxdomain, (char *) "NXDOMAIN", (char *) "no such domain name"},
491 {ns_r_notimpl, (char *) "NOTIMP", (char *) "not implemented"},
492 {ns_r_refused, (char *) "REFUSED", (char *) "refused"},
493 {ns_r_yxdomain, (char *) "YXDOMAIN", (char *) "domain name exists"},
494 {ns_r_yxrrset, (char *) "YXRRSET", (char *) "rrset exists"},
495 {ns_r_nxrrset, (char *) "NXRRSET", (char *) "rrset doesn't exist"},
496 {ns_r_notauth, (char *) "NOTAUTH", (char *) "not authoritative"},
497 {ns_r_notzone, (char *) "NOTZONE", (char *) "Not in zone"},
498 {ns_r_max, (char *) "", (char *) ""},
499 {ns_r_badsig, (char *) "BADSIG", (char *) "bad signature"},
500 {ns_r_badkey, (char *) "BADKEY", (char *) "bad key"},
501 {ns_r_badtime, (char *) "BADTIME", (char *) "bad time"},
502 {0, NULL, NULL}
503};
504
505int
506sym_ston(const struct res_sym *syms, const char *name, int *success) {
507 for ((void)NULL; syms->name != 0; syms++) {
508 if (strcasecmp (name, syms->name) == 0) {
509 if (success)
510 *success = 1;
511 return (syms->number);
512 }
513 }
514 if (success)
515 *success = 0;
516 return (syms->number); /* The default value. */
517}
518
519const char *
520sym_ntos(const struct res_sym *syms, int number, int *success) {
521 static char unname[20];
522
523 for ((void)NULL; syms->name != 0; syms++) {
524 if (number == syms->number) {
525 if (success)
526 *success = 1;
527 return (syms->name);
528 }
529 }
530
531 sprintf(unname, "%d", number); /* XXX nonreentrant */
532 if (success)
533 *success = 0;
534 return (unname);
535}
536libresolv_hidden_def (sym_ntos)
537
538const char *
539sym_ntop(const struct res_sym *syms, int number, int *success) {
540 static char unname[20];
541
542 for ((void)NULL; syms->name != 0; syms++) {
543 if (number == syms->number) {
544 if (success)
545 *success = 1;
546 return (syms->humanname);
547 }
548 }
549 sprintf(unname, "%d", number); /* XXX nonreentrant */
550 if (success)
551 *success = 0;
552 return (unname);
553}
554
555/*
556 * Return a string for the type.
557 */
558const char *
559p_type(int type) {
560 return (sym_ntos(__p_type_syms, type, (int *)0));
561}
562libresolv_hidden_def (p_type)
563
564/*
565 * Return a string for the type.
566 */
567static const char *
568p_section(int section, int opcode) {
569 const struct res_sym *symbols;
570
571 switch (opcode) {
572 case ns_o_update:
573 symbols = __p_update_section_syms;
574 break;
575 default:
576 symbols = __p_default_section_syms;
577 break;
578 }
579 return (sym_ntos(symbols, section, (int *)0));
580}
581
582/*
583 * Return a mnemonic for class.
584 */
585const char *
586p_class(int class) {
587 return (sym_ntos(__p_class_syms, class, (int *)0));
588}
589libresolv_hidden_def (p_class)
590
591/*
592 * Return a mnemonic for an option
593 */
594const char *
595p_option(u_long option) {
596 static char nbuf[40];
597
598 switch (option) {
599 case RES_INIT: return "init";
600 case RES_DEBUG: return "debug";
601 case RES_USEVC: return "use-vc";
602 case RES_IGNTC: return "igntc";
603 case RES_RECURSE: return "recurs";
604 case RES_DEFNAMES: return "defnam";
605 case RES_STAYOPEN: return "styopn";
606 case RES_DNSRCH: return "dnsrch";
607 case RES_NOALIASES: return "noaliases";
608 case RES_ROTATE: return "rotate";
609 case RES_USE_EDNS0: return "edns0";
610 case RES_SNGLKUP: return "single-request";
611 case RES_SNGLKUPREOP: return "single-request-reopen";
612 case RES_USE_DNSSEC: return "dnssec";
613 case RES_NOTLDQUERY: return "no-tld-query";
614 case RES_NORELOAD: return "no-reload";
615 case RES_TRUSTAD: return "trust-ad";
616 /* XXX nonreentrant */
617 default: sprintf(nbuf, "?0x%lx?", (u_long)option);
618 return (nbuf);
619 }
620}
621libresolv_hidden_def (p_option)
622
623/*
624 * Return a mnemonic for a time to live.
625 */
626const char *
627p_time(uint32_t value) {
628 static char nbuf[40]; /* XXX nonreentrant */
629
630 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
631 sprintf(nbuf, "%u", value);
632 return (nbuf);
633}
634
635/*
636 * Return a string for the rcode.
637 */
638const char *
639p_rcode(int rcode) {
640 return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
641}
642libresolv_hidden_def (p_rcode)
643
644/*
645 * routines to convert between on-the-wire RR format and zone file format.
646 * Does not contain conversion to/from decimal degrees; divide or multiply
647 * by 60*60*1000 for that.
648 */
649
650static const unsigned int poweroften[10]=
651 { 1, 10, 100, 1000, 10000, 100000,
652 1000000,10000000,100000000,1000000000};
653
654/* takes an XeY precision/size value, returns a string representation. */
655static const char *
656precsize_ntoa (uint8_t prec)
657{
658 static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */
659 unsigned long val;
660 int mantissa, exponent;
661
662 mantissa = (int)((prec >> 4) & 0x0f) % 10;
663 exponent = (int)((prec >> 0) & 0x0f) % 10;
664
665 val = mantissa * poweroften[exponent];
666
667 (void) sprintf(retbuf, "%ld.%.2ld", val/100, val%100);
668 return (retbuf);
669}
670
671/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
672static uint8_t
673precsize_aton (const char **strptr)
674{
675 unsigned int mval = 0, cmval = 0;
676 uint8_t retval = 0;
677 const char *cp;
678 int exponent;
679 int mantissa;
680
681 cp = *strptr;
682
683 while (isdigit(*cp))
684 mval = mval * 10 + (*cp++ - '0');
685
686 if (*cp == '.') { /* centimeters */
687 cp++;
688 if (isdigit(*cp)) {
689 cmval = (*cp++ - '0') * 10;
690 if (isdigit(*cp)) {
691 cmval += (*cp++ - '0');
692 }
693 }
694 }
695 cmval = (mval * 100) + cmval;
696
697 for (exponent = 0; exponent < 9; exponent++)
698 if (cmval < poweroften[exponent+1])
699 break;
700
701 mantissa = cmval / poweroften[exponent];
702 if (mantissa > 9)
703 mantissa = 9;
704
705 retval = (mantissa << 4) | exponent;
706
707 *strptr = cp;
708
709 return (retval);
710}
711
712/* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
713static uint32_t
714latlon2ul (const char **latlonstrptr, int *which)
715{
716 const char *cp;
717 uint32_t retval;
718 int deg = 0, min = 0, secs = 0, secsfrac = 0;
719
720 cp = *latlonstrptr;
721
722 while (isdigit(*cp))
723 deg = deg * 10 + (*cp++ - '0');
724
725 while (isspace(*cp))
726 cp++;
727
728 if (!(isdigit(*cp)))
729 goto fndhemi;
730
731 while (isdigit(*cp))
732 min = min * 10 + (*cp++ - '0');
733
734 while (isspace(*cp))
735 cp++;
736
737 if (!(isdigit(*cp)))
738 goto fndhemi;
739
740 while (isdigit(*cp))
741 secs = secs * 10 + (*cp++ - '0');
742
743 if (*cp == '.') { /* decimal seconds */
744 cp++;
745 if (isdigit(*cp)) {
746 secsfrac = (*cp++ - '0') * 100;
747 if (isdigit(*cp)) {
748 secsfrac += (*cp++ - '0') * 10;
749 if (isdigit(*cp)) {
750 secsfrac += (*cp++ - '0');
751 }
752 }
753 }
754 }
755
756 while (!isspace(*cp)) /* if any trailing garbage */
757 cp++;
758
759 while (isspace(*cp))
760 cp++;
761
762 fndhemi:
763 switch (*cp) {
764 case 'N': case 'n':
765 case 'E': case 'e':
766 retval = ((unsigned)1<<31)
767 + (((((deg * 60) + min) * 60) + secs) * 1000)
768 + secsfrac;
769 break;
770 case 'S': case 's':
771 case 'W': case 'w':
772 retval = ((unsigned)1<<31)
773 - (((((deg * 60) + min) * 60) + secs) * 1000)
774 - secsfrac;
775 break;
776 default:
777 retval = 0; /* invalid value -- indicates error */
778 break;
779 }
780
781 switch (*cp) {
782 case 'N': case 'n':
783 case 'S': case 's':
784 *which = 1; /* latitude */
785 break;
786 case 'E': case 'e':
787 case 'W': case 'w':
788 *which = 2; /* longitude */
789 break;
790 default:
791 *which = 0; /* error */
792 break;
793 }
794
795 cp++; /* skip the hemisphere */
796
797 while (!isspace(*cp)) /* if any trailing garbage */
798 cp++;
799
800 while (isspace(*cp)) /* move to next field */
801 cp++;
802
803 *latlonstrptr = cp;
804
805 return (retval);
806}
807
808/* converts a zone file representation in a string to an RDATA on-the-wire
809 * representation. */
810int
811loc_aton (const char *ascii, u_char *binary)
812{
813 const char *cp, *maxcp;
814 u_char *bcp;
815
816 uint32_t latit = 0, longit = 0, alt = 0;
817 uint32_t lltemp1 = 0, lltemp2 = 0;
818 int altmeters = 0, altfrac = 0, altsign = 1;
819 uint8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */
820 uint8_t vp = 0x13; /* default = 1e3 cm = 10.00m */
821 uint8_t siz = 0x12; /* default = 1e2 cm = 1.00m */
822 int which1 = 0, which2 = 0;
823
824 cp = ascii;
825 maxcp = cp + strlen(ascii);
826
827 lltemp1 = latlon2ul(&cp, &which1);
828
829 lltemp2 = latlon2ul(&cp, &which2);
830
831 switch (which1 + which2) {
832 case 3: /* 1 + 2, the only valid combination */
833 if ((which1 == 1) && (which2 == 2)) { /* normal case */
834 latit = lltemp1;
835 longit = lltemp2;
836 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
837 longit = lltemp1;
838 latit = lltemp2;
839 } else { /* some kind of brokenness */
840 return (0);
841 }
842 break;
843 default: /* we didn't get one of each */
844 return (0);
845 }
846
847 /* altitude */
848 if (*cp == '-') {
849 altsign = -1;
850 cp++;
851 }
852
853 if (*cp == '+')
854 cp++;
855
856 while (isdigit(*cp))
857 altmeters = altmeters * 10 + (*cp++ - '0');
858
859 if (*cp == '.') { /* decimal meters */
860 cp++;
861 if (isdigit(*cp)) {
862 altfrac = (*cp++ - '0') * 10;
863 if (isdigit(*cp)) {
864 altfrac += (*cp++ - '0');
865 }
866 }
867 }
868
869 alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
870
871 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
872 cp++;
873
874 while (isspace(*cp) && (cp < maxcp))
875 cp++;
876
877 if (cp >= maxcp)
878 goto defaults;
879
880 siz = precsize_aton(&cp);
881
882 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
883 cp++;
884
885 while (isspace(*cp) && (cp < maxcp))
886 cp++;
887
888 if (cp >= maxcp)
889 goto defaults;
890
891 hp = precsize_aton(&cp);
892
893 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
894 cp++;
895
896 while (isspace(*cp) && (cp < maxcp))
897 cp++;
898
899 if (cp >= maxcp)
900 goto defaults;
901
902 vp = precsize_aton(&cp);
903
904 defaults:
905
906 bcp = binary;
907 *bcp++ = (uint8_t) 0; /* version byte */
908 *bcp++ = siz;
909 *bcp++ = hp;
910 *bcp++ = vp;
911 PUTLONG(latit,bcp);
912 PUTLONG(longit,bcp);
913 PUTLONG(alt,bcp);
914
915 return (16); /* size of RR in octets */
916}
917
918/* takes an on-the-wire LOC RR and formats it in a human readable format. */
919const char *
920loc_ntoa (const u_char *binary, char *ascii)
921{
922 static const char error[] = "?";
923 static char tmpbuf[sizeof
924"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
925 const u_char *cp = binary;
926
927 int latdeg, latmin, latsec, latsecfrac;
928 int longdeg, longmin, longsec, longsecfrac;
929 char northsouth, eastwest;
930 int altmeters, altfrac, altsign;
931
932 const uint32_t referencealt = 100000 * 100;
933
934 int32_t latval, longval, altval;
935 uint32_t templ;
936 uint8_t sizeval, hpval, vpval, versionval;
937
938 char *sizestr, *hpstr, *vpstr;
939
940 versionval = *cp++;
941
942 if (ascii == NULL)
943 ascii = tmpbuf;
944
945 if (versionval) {
946 (void) sprintf(ascii, "; error: unknown LOC RR version");
947 return (ascii);
948 }
949
950 sizeval = *cp++;
951
952 hpval = *cp++;
953 vpval = *cp++;
954
955 GETLONG(templ, cp);
956 latval = (templ - ((unsigned)1<<31));
957
958 GETLONG(templ, cp);
959 longval = (templ - ((unsigned)1<<31));
960
961 GETLONG(templ, cp);
962 if (templ < referencealt) { /* below WGS 84 spheroid */
963 altval = referencealt - templ;
964 altsign = -1;
965 } else {
966 altval = templ - referencealt;
967 altsign = 1;
968 }
969
970 if (latval < 0) {
971 northsouth = 'S';
972 latval = -latval;
973 } else
974 northsouth = 'N';
975
976 latsecfrac = latval % 1000;
977 latval = latval / 1000;
978 latsec = latval % 60;
979 latval = latval / 60;
980 latmin = latval % 60;
981 latval = latval / 60;
982 latdeg = latval;
983
984 if (longval < 0) {
985 eastwest = 'W';
986 longval = -longval;
987 } else
988 eastwest = 'E';
989
990 longsecfrac = longval % 1000;
991 longval = longval / 1000;
992 longsec = longval % 60;
993 longval = longval / 60;
994 longmin = longval % 60;
995 longval = longval / 60;
996 longdeg = longval;
997
998 altfrac = altval % 100;
999 altmeters = (altval / 100) * altsign;
1000
1001 if ((sizestr = strdup(precsize_ntoa(sizeval))) == NULL)
1002 sizestr = (char *) error;
1003 if ((hpstr = strdup(precsize_ntoa(hpval))) == NULL)
1004 hpstr = (char *) error;
1005 if ((vpstr = strdup(precsize_ntoa(vpval))) == NULL)
1006 vpstr = (char *) error;
1007
1008 sprintf(ascii,
1009 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm",
1010 latdeg, latmin, latsec, latsecfrac, northsouth,
1011 longdeg, longmin, longsec, longsecfrac, eastwest,
1012 altmeters, altfrac, sizestr, hpstr, vpstr);
1013
1014 if (sizestr != (char *) error)
1015 free(sizestr);
1016 if (hpstr != (char *) error)
1017 free(hpstr);
1018 if (vpstr != (char *) error)
1019 free(vpstr);
1020
1021 return (ascii);
1022}
1023libresolv_hidden_def (loc_ntoa)
1024
1025
1026/* Return the number of DNS hierarchy levels in the name. */
1027int
1028dn_count_labels(const char *name) {
1029 int i, len, count;
1030
1031 len = strlen(name);
1032 for (i = 0, count = 0; i < len; i++) {
1033 /* XXX need to check for \. or use named's nlabels(). */
1034 if (name[i] == '.')
1035 count++;
1036 }
1037
1038 /* don't count initial wildcard */
1039 if (name[0] == '*')
1040 if (count)
1041 count--;
1042
1043 /* don't count the null label for root. */
1044 /* if terminating '.' not found, must adjust */
1045 /* count to include last label */
1046 if (len > 0 && name[len-1] != '.')
1047 count++;
1048 return (count);
1049}
1050libresolv_hidden_def (__dn_count_labels)
1051
1052
1053#if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)
1054/*
1055 * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1056 * SIG records are required to be printed like this, by the Secure DNS RFC.
1057 * This is an obsolescent function and does not handle dates outside the
1058 * signed 32-bit range.
1059 */
1060char *
1061__p_secstodate (u_long secs) {
1062 /* XXX nonreentrant */
1063 static char output[15]; /* YYYYMMDDHHMMSS and null */
1064 time_t clock = secs;
1065 struct tm *time;
1066
1067 struct tm timebuf;
1068 /* The call to __gmtime_r can never produce a year overflowing
1069 the range of int, given the check on SECS, but check for a
1070 NULL return anyway to avoid a null pointer dereference in
1071 case there are any other unspecified errors. */
1072 if (secs > 0x7fffffff
1073 || (time = __gmtime_r (&clock, &timebuf)) == NULL) {
1074 strcpy (output, "<overflow>");
1075 __set_errno (EOVERFLOW);
1076 return output;
1077 }
1078 time->tm_year += 1900;
1079 time->tm_mon += 1;
1080 /* The struct tm fields, given the above range check,
1081 must have values that mean this sprintf exactly fills the
1082 buffer. But as of GCC 8 of 2017-11-21, GCC cannot tell
1083 that, even given range checks on all fields with
1084 __builtin_unreachable called for out-of-range values. */
1085 DIAG_PUSH_NEEDS_COMMENT;
1086# if __GNUC_PREREQ (7, 0)
1087 DIAG_IGNORE_NEEDS_COMMENT (8, "-Wformat-overflow=");
1088# endif
1089 sprintf(output, "%04d%02d%02d%02d%02d%02d",
1090 time->tm_year, time->tm_mon, time->tm_mday,
1091 time->tm_hour, time->tm_min, time->tm_sec);
1092 DIAG_POP_NEEDS_COMMENT;
1093 return (output);
1094}
1095compat_symbol (libresolv, __p_secstodate, __p_secstodate, GLIBC_2_0);
1096#endif
1097