lib/route_opaque.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Opaque data for Zebra from other daemons.
   3  *
   4  * Copyright (C) 2021 Donatas Abraitis <donatas.abraitis@gmail.com>
   5  */
   6
   7 #ifndef FRR_ROUTE_OPAQUE_H
   8 #define FRR_ROUTE_OPAQUE_H
   9
  10 #include "assert.h"
  11 #include "zclient.h"
  12
  13 /* copied from bgpd/bgp_community.h */
  14 #define COMMUNITY_SIZE 4
  15 /* copied from bgpd/bgp_lcommunity.h */
  16 #define LCOMMUNITY_SIZE 12
  17 /* copied from bgpd/bgp_route.h */
  18 #define BGP_MAX_SELECTION_REASON_STR_BUF 32
  19
  20 struct bgp_zebra_opaque {
  21         char aspath[256];
  22
  23         /* Show at least 10 communities AA:BB */
  24         char community[COMMUNITY_SIZE * 20];
  25
  26         /* Show at least 10 large-communities AA:BB:CC */
  27         char lcommunity[LCOMMUNITY_SIZE * 30];
  28
  29         /* 32 bytes seems enough because of
  30          * bgp_path_selection_confed_as_path which is
  31          * `Confederation based AS Path`.
  32          */
  33         char selection_reason[BGP_MAX_SELECTION_REASON_STR_BUF];
  34 };
  35
  36 struct ospf_zebra_opaque {
  37         char path_type[32];
  38         char area_id[INET_ADDRSTRLEN];
  39         char tag[16];
  40 };
  41
  42 static_assert(sizeof(struct bgp_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
  43               "BGP opaque data shouldn't be larger than zebra's buffer");
  44 static_assert(sizeof(struct ospf_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
  45               "OSPF opaque data shouldn't be larger than zebra's buffer");
  46
  47 #endif /* FRR_ROUTE_OPAQUE_H */