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_RCV_PKT_BUF_SIZE     32768
  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 void netlink_parse_rtattr_nested(struct rtattr **tb, int max,
  32                                         struct rtattr *rta);
  33 extern int addattr_l(struct nlmsghdr *n, unsigned int maxlen, int type,
  34                      const void *data, unsigned int alen);
  35 extern int rta_addattr_l(struct rtattr *rta, unsigned int maxlen, int type,
  36                          const void *data, unsigned int alen);
  37 extern int addattr16(struct nlmsghdr *n, unsigned int maxlen, int type,
  38                      uint16_t data);
  39 extern int addattr32(struct nlmsghdr *n, unsigned int maxlen, int type,
  40                      int data);
  41 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
  42 extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
  43 extern struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
  44 extern int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
  45 extern const char *nl_msg_type_to_str(uint16_t msg_type);
  46 extern const char *nl_rtproto_to_str(uint8_t rtproto);
  47 extern const char *nl_family_to_str(uint8_t family);
  48 extern const char *nl_rttype_to_str(uint8_t rttype);
  49
  50 #if defined(HANDLE_NETLINK_FUZZING)
  51 extern bool netlink_read;
  52 extern void netlink_read_init(const char *fname);
  53 #endif /* HANDLE_NETLINK_FUZZING */
  54 extern int netlink_parse_info(int (*filter)(struct nlmsghdr *, ns_id_t, int),
  55                               const struct nlsock *nl,
  56                               const struct zebra_dplane_info *dp_info,
  57                               int count, int startup);
  58 extern int netlink_talk_filter(struct nlmsghdr *h, ns_id_t ns, int startup);
  59 extern int netlink_talk(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
  60                         struct nlmsghdr *n, struct nlsock *nl,
  61                         struct zebra_ns *zns, int startup);
  62 /* Version with 'info' struct only */
  63 int netlink_talk_info(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
  64                       struct nlmsghdr *n,
  65                       const struct zebra_dplane_info *dp_info, int startup);
  66
  67 extern int netlink_request(struct nlsock *nl, struct nlmsghdr *n);
  68
  69 #endif /* HAVE_NETLINK */
  70
  71 #endif /* _ZEBRA_KERNEL_NETLINK_H */