lib/route_opaque.h

   1 /* Opaque data for Zebra from other daemons.
   2  *
   3  * Copyright (C) 2021 Donatas Abraitis <donatas.abraitis@gmail.com>
   4  *
   5  * This file is part of FRRouting (FRR).
   6  *
   7  * FRR is free software; you can redistribute it and/or modify it under the
   8  * terms of the GNU General Public License as published by the Free Software
   9  * Foundation; either version 2, or (at your option) any later version.
  10  *
  11  * FRR is distributed in the hope that it will be useful, but WITHOUT ANY
  12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  14  * 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 FRR_ROUTE_OPAQUE_H
  22 #define FRR_ROUTE_OPAQUE_H
  23
  24 #include "assert.h"
  25 #include "zclient.h"
  26
  27 /* copied from bgpd/bgp_community.h */
  28 #define COMMUNITY_SIZE 4
  29 /* copied from bgpd/bgp_lcommunity.h */
  30 #define LCOMMUNITY_SIZE 12
  31 /* copied from bgpd/bgp_route.h */
  32 #define BGP_MAX_SELECTION_REASON_STR_BUF 32
  33
  34 struct bgp_zebra_opaque {
  35         char aspath[256];
  36
  37         /* Show at least 10 communities AA:BB */
  38         char community[COMMUNITY_SIZE * 20];
  39
  40         /* Show at least 10 large-communities AA:BB:CC */
  41         char lcommunity[LCOMMUNITY_SIZE * 30];
  42
  43         /* 32 bytes seems enough because of
  44          * bgp_path_selection_confed_as_path which is
  45          * `Confederation based AS Path`.
  46          */
  47         char selection_reason[BGP_MAX_SELECTION_REASON_STR_BUF];
  48 };
  49
  50 struct ospf_zebra_opaque {
  51         char path_type[32];
  52         char area_id[INET_ADDRSTRLEN];
  53         char tag[16];
  54 };
  55
  56 static_assert(sizeof(struct bgp_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
  57               "BGP opaque data shouldn't be larger than zebra's buffer");
  58 static_assert(sizeof(struct ospf_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
  59               "OSPF opaque data shouldn't be larger than zebra's buffer");
  60
  61 #endif /* FRR_ROUTE_OPAQUE_H */