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-rw-r--r--bgpd/bgp_routemap.c115
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);