zebra/kernel_netlink.h

   1 /* Declarations and definitions for kernel interaction over netlink
   2  * Copyright (C) 2016 Cumulus Networks, Inc.
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #ifndef _ZEBRA_KERNEL_NETLINK_H
  23 #define _ZEBRA_KERNEL_NETLINK_H
  24
  25 #ifdef HAVE_NETLINK
  26
  27 #define NL_PKT_BUF_SIZE         8192
  28
  29 extern void netlink_parse_rtattr (struct rtattr **tb, int max,
  30                                   struct rtattr *rta, int len);
  31 extern int addattr_l (struct nlmsghdr *n, unsigned int maxlen,
  32                       int type, void *data, int alen);
  33 extern int rta_addattr_l (struct rtattr *rta, unsigned int maxlen,
  34                           int type, void *data, int alen);
  35 extern int addattr32 (struct nlmsghdr *n, unsigned int maxlen,
  36                       int type, int data);
  37 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
  38 extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
  39 extern struct rtattr * rta_nest(struct rtattr *rta, int maxlen, int type);
  40 extern int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
  41 extern const char * nl_msg_type_to_str (uint16_t msg_type);
  42 extern const char * nl_rtproto_to_str (u_char rtproto);
  43
  44 extern int netlink_parse_info (int (*filter) (struct sockaddr_nl *,
  45                                struct nlmsghdr *, ns_id_t), struct nlsock *nl,
  46                                struct zebra_ns *zns, int count);
  47 extern int netlink_talk (struct nlmsghdr *n, struct nlsock *nl,
  48                          struct zebra_ns *zns);
  49 extern int netlink_request (int family, int type, struct nlsock *nl);
  50
  51 #endif /* HAVE_NETLINK */
  52
  53 #endif /* _ZEBRA_KERNEL_NETLINK_H */