diff options
Diffstat (limited to 'bgpd/bgp_routemap.c')
| -rw-r--r-- | bgpd/bgp_routemap.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c index d8d1fa5ddc..fa8701dc50 100644 --- a/bgpd/bgp_routemap.c +++ b/bgpd/bgp_routemap.c @@ -1303,6 +1303,61 @@ static const struct route_map_rule_cmd route_match_evpn_rd_cmd = { route_match_rd_free }; +/* `match community-limit' */ + +/* Match function should return : + * - RMAP_MATCH if the bgp update community list count + * is less or equal to the configured limit. + * - RMAP_NOMATCH if the community list count is greater than the + * configured limit. + */ +static enum route_map_cmd_result_t +route_match_community_limit(void *rule, const struct prefix *prefix, void *object) +{ + struct bgp_path_info *path = NULL; + struct community *picomm = NULL; + uint16_t count = 0; + uint16_t *limit_rule = rule; + + path = (struct bgp_path_info *)object; + + picomm = bgp_attr_get_community(path->attr); + if (picomm) + count = picomm->size; + + if (count <= *limit_rule) + return RMAP_MATCH; + + return RMAP_NOMATCH; +} + +/* Route map `community-limit' match statement. */ +static void *route_match_community_limit_compile(const char *arg) +{ + uint16_t *limit = NULL; + char *end = NULL; + + limit = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(uint16_t)); + *limit = strtoul(arg, &end, 10); + if (*end != '\0') { + XFREE(MTYPE_ROUTE_MAP_COMPILED, limit); + return NULL; + } + return limit; +} + +/* Free route map's compiled `community-limit' value. */ +static void route_match_community_limit_free(void *rule) +{ + XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); +} + +/* Route map commands for community limit matching. */ +static const struct route_map_rule_cmd route_match_community_limit_cmd = { + "community-limit", route_match_community_limit, + route_match_community_limit_compile, route_match_community_limit_free +}; + static enum route_map_cmd_result_t route_set_evpn_gateway_ip(void *rule, const struct prefix *prefix, void *object) { @@ -5707,6 +5762,25 @@ DEFPY_YANG( return nb_cli_apply_changes(vty, NULL); } +DEFPY_YANG( + match_community_limit, match_community_limit_cmd, + "[no$no] match community-limit ![(0-65535)$limit]", + NO_STR + MATCH_STR + "Match BGP community limit\n" + "Community limit number\n") +{ + const char *xpath = "./match-condition[condition='frr-bgp-route-map:match-community-limit']"; + char xpath_value[XPATH_MAXLEN]; + + nb_cli_enqueue_change(vty, xpath, no ? NB_OP_DESTROY : NB_OP_CREATE, NULL); + snprintf(xpath_value, sizeof(xpath_value), + "%s/rmap-match-condition/frr-bgp-route-map:community-limit", xpath); + + nb_cli_enqueue_change(vty, xpath_value, no ? NB_OP_DESTROY : NB_OP_MODIFY, limit_str); + return nb_cli_apply_changes(vty, NULL); +} + DEFUN_YANG( no_match_community, no_match_community_cmd, "no match community [<(1-99)|(100-500)|COMMUNITY_LIST_NAME> [<exact-match$exact|any$any>]]", @@ -7905,6 +7979,7 @@ void bgp_route_map_init(void) route_map_install_match(&route_match_evpn_vni_cmd); route_map_install_match(&route_match_evpn_route_type_cmd); route_map_install_match(&route_match_evpn_rd_cmd); + route_map_install_match(&route_match_community_limit_cmd); route_map_install_match(&route_match_evpn_default_route_cmd); route_map_install_match(&route_match_vrl_source_vrf_cmd); @@ -7977,6 +8052,7 @@ void bgp_route_map_init(void) install_element(RMAP_NODE, &no_match_alias_cmd); install_element(RMAP_NODE, &match_community_cmd); install_element(RMAP_NODE, &no_match_community_cmd); + install_element(RMAP_NODE, &match_community_limit_cmd); install_element(RMAP_NODE, &match_lcommunity_cmd); install_element(RMAP_NODE, &no_match_lcommunity_cmd); install_element(RMAP_NODE, &match_ecommunity_cmd); |