1/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#ifndef _NETLINKACCESS_H
19#define _NETLINKACCESS_H 1
20
21#include <stdint.h>
22#include <sys/types.h>
23#include <asm/types.h>
24#include <linux/netlink.h>
25#include <linux/rtnetlink.h>
26
27
28struct netlink_res
29{
30 struct netlink_res *next;
31 struct nlmsghdr *nlh;
32 size_t size; /* Size of response. */
33 uint32_t seq; /* sequential number we used. */
34};
35
36
37struct netlink_handle
38{
39 int fd; /* Netlink file descriptor. */
40 pid_t pid; /* Process ID. */
41 uint32_t seq; /* The sequence number we use currently. */
42 struct netlink_res *nlm_list; /* Pointer to list of responses. */
43 struct netlink_res *end_ptr; /* For faster append of new entries. */
44};
45
46
47extern int __netlink_open (struct netlink_handle *h) attribute_hidden;
48extern void __netlink_close (struct netlink_handle *h) attribute_hidden;
49extern void __netlink_free_handle (struct netlink_handle *h)
50 attribute_hidden;
51extern int __netlink_request (struct netlink_handle *h, int type)
52 attribute_hidden;
53
54/* Terminate the process if RESULT is an invalid recvmsg result for
55 the netlink socket FD. */
56void __netlink_assert_response (int fd, ssize_t result);
57libc_hidden_proto (__netlink_assert_response)
58
59#endif /* netlinkaccess.h */
60