libc/inet/netlinkaccess.h

   1 /* Copyright (C) 2004, 2005 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 <features.h>
  22 #include <stdint.h>
  23 #include <unistd.h>
  24 #if defined __ASSUME_NETLINK_SUPPORT || defined __UCLIBC_USE_NETLINK__
  25 #include <asm/types.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/netlink.h>
  28
  29 struct netlink_res
  30 {
  31   struct netlink_res *next;
  32   struct nlmsghdr *nlh;
  33   size_t size;                  /* Size of response.  */
  34   uint32_t seq;                 /* sequential number we used.  */
  35 };
  36
  37
  38 struct netlink_handle
  39 {
  40   int fd;                       /* Netlink file descriptor.  */
  41   pid_t pid;                    /* Process ID.  */
  42   uint32_t seq;                 /* The sequence number we use currently.  */
  43   struct netlink_res *nlm_list; /* Pointer to list of responses.  */
  44   struct netlink_res *end_ptr;  /* For faster append of new entries.  */
  45 };
  46
  47
  48 #ifndef __ASSUME_NETLINK_SUPPORT
  49 #define __ASSUME_NETLINK_SUPPORT 1
  50 #endif
  51
  52 extern int __netlink_open (struct netlink_handle *h) attribute_hidden;
  53 extern void __netlink_close (struct netlink_handle *h) attribute_hidden;
  54 extern void __netlink_free_handle (struct netlink_handle *h) attribute_hidden;
  55 extern int __netlink_request (struct netlink_handle *h, int type) attribute_hidden;
  56
  57 #else
  58 #define __ASSUME_NETLINK_SUPPORT 0
  59 #endif
  60
  61 #endif /* _NETLINKACCESS_H */