diff options
Diffstat (limited to 'bgpd/bgp_routemap.c')
| -rw-r--r-- | bgpd/bgp_routemap.c | 115 |
1 files changed, 112 insertions, 3 deletions
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c index b246e2ab..b93b2682 100644 --- a/bgpd/bgp_routemap.c +++ b/bgpd/bgp_routemap.c @@ -94,6 +94,7 @@ o Local extention set ipv6 next-hop global: Done set ipv6 next-hop local : Done set pathlimit ttl : Done + set as-path exclude : Done match pathlimit as : Done */ @@ -1274,6 +1275,64 @@ struct route_map_rule_cmd route_set_aspath_prepend_cmd = route_set_aspath_prepend_free, }; +/* `set as-path exclude ASn' */ + +/* For ASN exclude mechanism. + * Iterate over ASns requested and filter them from the given AS_PATH one by one. + * Make a deep copy of existing AS_PATH, but for the first ASn only. + */ +static route_map_result_t +route_set_aspath_exclude (void *rule, struct prefix *dummy, route_map_object_t type, void *object) +{ + struct aspath * new_path, * exclude_path; + struct bgp_info *binfo; + + if (type == RMAP_BGP) + { + exclude_path = rule; + binfo = object; + if (binfo->attr->aspath->refcnt) + new_path = aspath_dup (binfo->attr->aspath); + else + new_path = binfo->attr->aspath; + binfo->attr->aspath = aspath_filter_exclude (new_path, exclude_path); + } + return RMAP_OKAY; +} + +/* FIXME: consider using route_set_aspath_prepend_compile() and + * route_set_aspath_prepend_free(), which two below function are + * exact clones of. + */ + +/* Compile function for as-path exclude. */ +static void * +route_set_aspath_exclude_compile (const char *arg) +{ + struct aspath *aspath; + + aspath = aspath_str2aspath (arg); + if (! aspath) + return NULL; + return aspath; +} + +static void +route_set_aspath_exclude_free (void *rule) +{ + struct aspath *aspath = rule; + aspath_free (aspath); +} + +/* Set ASn exlude rule structure. */ +struct route_map_rule_cmd route_set_aspath_exclude_cmd = +{ + "as-path exclude", + route_set_aspath_exclude, + route_set_aspath_exclude_compile, + route_set_aspath_exclude_free, +}; + /* `set community COMMUNITY' */ struct rmap_com_set { @@ -2996,7 +3055,7 @@ DEFUN (set_aspath_prepend, set_aspath_prepend_cmd, "set as-path prepend .<1-65535>", SET_STR - "Prepend string for a BGP AS-path attribute\n" + "Transform BGP AS_PATH attribute\n" "Prepend to the as-path\n" "AS number\n") { @@ -3015,7 +3074,7 @@ DEFUN (no_set_aspath_prepend, "no set as-path prepend", NO_STR SET_STR - "Prepend string for a BGP AS-path attribute\n" + "Transform BGP AS_PATH attribute\n" "Prepend to the as-path\n") { int ret; @@ -3035,10 +3094,56 @@ ALIAS (no_set_aspath_prepend, "no set as-path prepend .<1-65535>", NO_STR SET_STR - "Prepend string for a BGP AS-path attribute\n" + "Transform BGP AS_PATH attribute\n" "Prepend to the as-path\n" "AS number\n") +DEFUN (set_aspath_exclude, + set_aspath_exclude_cmd, + "set as-path exclude .<1-65535>", + SET_STR + "Transform BGP AS-path attribute\n" + "Exclude from the as-path\n" + "AS number\n") +{ + int ret; + char *str; + + str = argv_concat (argv, argc, 0); + ret = bgp_route_set_add (vty, vty->index, "as-path exclude", str); + XFREE (MTYPE_TMP, str); + return ret; +} + +DEFUN (no_set_aspath_exclude, + no_set_aspath_exclude_cmd, + "no set as-path exclude", + NO_STR + SET_STR + "Transform BGP AS_PATH attribute\n" + "Exclude from the as-path\n") +{ + int ret; + char *str; + + if (argc == 0) + return bgp_route_set_delete (vty, vty->index, "as-path exclude", NULL); + + str = argv_concat (argv, argc, 0); + ret = bgp_route_set_delete (vty, vty->index, "as-path exclude", str); + XFREE (MTYPE_TMP, str); + return ret; +} + +ALIAS (no_set_aspath_exclude, + no_set_aspath_exclude_val_cmd, + "no set as-path exclude .<1-65535>", + NO_STR + SET_STR + "Transform BGP AS_PATH attribute\n" + "Exclude from the as-path\n" + "AS number\n") + DEFUN (set_community, set_community_cmd, "set community .AA:NN", @@ -3731,6 +3836,7 @@ bgp_route_map_init (void) route_map_install_set (&route_set_weight_cmd); route_map_install_set (&route_set_metric_cmd); route_map_install_set (&route_set_aspath_prepend_cmd); + route_map_install_set (&route_set_aspath_exclude_cmd); route_map_install_set (&route_set_origin_cmd); route_map_install_set (&route_set_atomic_aggregate_cmd); route_map_install_set (&route_set_aggregator_as_cmd); @@ -3799,8 +3905,11 @@ bgp_route_map_init (void) install_element (RMAP_NODE, &no_set_metric_cmd); install_element (RMAP_NODE, &no_set_metric_val_cmd); install_element (RMAP_NODE, &set_aspath_prepend_cmd); + install_element (RMAP_NODE, &set_aspath_exclude_cmd); install_element (RMAP_NODE, &no_set_aspath_prepend_cmd); install_element (RMAP_NODE, &no_set_aspath_prepend_val_cmd); + install_element (RMAP_NODE, &no_set_aspath_exclude_cmd); + install_element (RMAP_NODE, &no_set_aspath_exclude_val_cmd); install_element (RMAP_NODE, &set_origin_cmd); install_element (RMAP_NODE, &no_set_origin_cmd); install_element (RMAP_NODE, &no_set_origin_val_cmd); |