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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_KERNEL_NETLINK_H
  22 #define _ZEBRA_KERNEL_NETLINK_H
  23
  24 #ifdef HAVE_NETLINK
  25
  26 #define NL_PKT_BUF_SIZE         8192
  27
  28 extern void netlink_parse_rtattr (struct rtattr **tb, int max,
  29                                   struct rtattr *rta, int len);
  30 extern int addattr_l (struct nlmsghdr *n, unsigned int maxlen,
  31                       int type, void *data, unsigned int alen);
  32 extern int rta_addattr_l (struct rtattr *rta, unsigned int maxlen,
  33                           int type, void *data, unsigned int alen);
  34 extern int addattr32 (struct nlmsghdr *n, unsigned int maxlen,
  35                       int type, int data);
  36 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
  37 extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
  38 extern struct rtattr * rta_nest(struct rtattr *rta, int maxlen, int type);
  39 extern int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
  40 extern const char * nl_msg_type_to_str (uint16_t msg_type);
  41 extern const char * nl_rtproto_to_str (u_char rtproto);
  42 extern const char * nl_family_to_str (u_char family);
  43 extern const char * nl_rttype_to_str (u_char rttype);
  44
  45 extern int netlink_parse_info (int (*filter) (struct sockaddr_nl *,
  46                                               struct nlmsghdr *, ns_id_t, int),
  47                                struct nlsock *nl, struct zebra_ns *zns,
  48                                int count, int startup);
  49 extern int netlink_talk_filter (struct sockaddr_nl *, struct nlmsghdr *,
  50                                 ns_id_t, int startup);
  51 extern int netlink_talk (int (*filter) (struct sockaddr_nl *, struct nlmsghdr *,
  52                                         ns_id_t, int startup),
  53                          struct nlmsghdr *n, struct nlsock *nl,
  54                          struct zebra_ns *zns, int startup);
  55 extern int netlink_request (int family, int type, struct nlsock *nl);
  56
  57 #endif /* HAVE_NETLINK */
  58
  59 #endif /* _ZEBRA_KERNEL_NETLINK_H */