sysdeps/unix/sysv/linux/netlinkaccess.h

   1 /* Copyright (C) 2004-2016 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    <http://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
  28 struct 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
  37 struct 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
  47 extern int __netlink_open (struct netlink_handle *h);
  48 extern void __netlink_close (struct netlink_handle *h);
  49 extern void __netlink_free_handle (struct netlink_handle *h);
  50 extern int __netlink_request (struct netlink_handle *h, int type);
  51
  52 /* Terminate the process if RESULT is an invalid recvmsg result for
  53    the netlink socket FD.  */
  54 void __netlink_assert_response (int fd, ssize_t result)
  55   internal_function;
  56 libc_hidden_proto (__netlink_assert_response)
  57
  58 #endif /* netlinkaccess.h */