bgpd: Support matching on local preference in route-map
This patch adds support for matching on local preference in
BGP route-map.
Signed-off-by: Dinesh Dutt <ddutt@cumulusnetworks.com>
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index 8d3a8f5..a9b6b50 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -72,6 +72,7 @@
metric : Done
route-type : (This will not be implemented by bgpd)
tag : (This will not be implemented by bgpd)
+ local-preference : Done
set as-path prepend : Done
as-path tag : Not yet
@@ -613,6 +614,72 @@
route_match_ip_route_source_prefix_list_free
};
+/* `match local-preference LOCAL-PREF' */
+
+/* Match function return 1 if match is success else return zero. */
+static route_map_result_t
+route_match_local_pref (void *rule, struct prefix *prefix,
+ route_map_object_t type, void *object)
+{
+ u_int32_t *local_pref;
+ struct bgp_info *bgp_info;
+
+ if (type == RMAP_BGP)
+ {
+ local_pref = rule;
+ bgp_info = object;
+
+ if (bgp_info->attr->local_pref == *local_pref)
+ return RMAP_MATCH;
+ else
+ return RMAP_NOMATCH;
+ }
+ return RMAP_NOMATCH;
+}
+
+/* Route map `match local-preference' match statement.
+ `arg' is local-pref value */
+static void *
+route_match_local_pref_compile (const char *arg)
+{
+ u_int32_t *local_pref;
+ char *endptr = NULL;
+ unsigned long tmpval;
+
+ /* Locpref value shoud be integer. */
+ if (! all_digit (arg))
+ return NULL;
+
+ errno = 0;
+ tmpval = strtoul (arg, &endptr, 10);
+ if (*endptr != '\0' || errno || tmpval > UINT32_MAX)
+ return NULL;
+
+ local_pref = XMALLOC (MTYPE_ROUTE_MAP_COMPILED, sizeof (u_int32_t));
+
+ if (!local_pref)
+ return local_pref;
+
+ *local_pref = tmpval;
+ return local_pref;
+}
+
+/* Free route map's compiled `match local-preference' value. */
+static void
+route_match_local_pref_free (void *rule)
+{
+ XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+/* Route map commands for metric matching. */
+struct route_map_rule_cmd route_match_local_pref_cmd =
+{
+ "local-preference",
+ route_match_local_pref,
+ route_match_local_pref_compile,
+ route_match_local_pref_free
+};
+
/* `match metric METRIC' */
/* Match function return 1 if match is success else return zero. */
@@ -2733,6 +2800,37 @@
"Match metric of route\n"
"Metric value\n")
+DEFUN (match_local_pref,
+ match_local_pref_cmd,
+ "match local-preference <0-4294967295>",
+ MATCH_STR
+ "Match local-preference of route\n"
+ "Metric value\n")
+{
+ return bgp_route_match_add (vty, vty->index, "local-preference", argv[0]);
+}
+
+DEFUN (no_match_local_pref,
+ no_match_local_pref_cmd,
+ "no match local-preference",
+ NO_STR
+ MATCH_STR
+ "Match local preference of route\n")
+{
+ if (argc == 0)
+ return bgp_route_match_delete (vty, vty->index, "local-preference", NULL);
+
+ return bgp_route_match_delete (vty, vty->index, "local-preference", argv[0]);
+}
+
+ALIAS (no_match_local_pref,
+ no_match_local_pref_val_cmd,
+ "no match local-preference <0-4294967295>",
+ NO_STR
+ MATCH_STR
+ "Match local preference of route\n"
+ "Local preference value\n")
+
DEFUN (match_community,
match_community_cmd,
"match community (<1-99>|<100-500>|WORD)",
@@ -3867,6 +3965,7 @@
route_map_delete_hook (bgp_route_map_update);
route_map_install_match (&route_match_peer_cmd);
+ route_map_install_match (&route_match_local_pref_cmd);
route_map_install_match (&route_match_ip_address_cmd);
route_map_install_match (&route_match_ip_next_hop_cmd);
route_map_install_match (&route_match_ip_route_source_cmd);
@@ -3876,6 +3975,7 @@
route_map_install_match (&route_match_aspath_cmd);
route_map_install_match (&route_match_community_cmd);
route_map_install_match (&route_match_ecommunity_cmd);
+ route_map_install_match (&route_match_local_pref_cmd);
route_map_install_match (&route_match_metric_cmd);
route_map_install_match (&route_match_origin_cmd);
route_map_install_match (&route_match_probability_cmd);
@@ -3926,6 +4026,9 @@
install_element (RMAP_NODE, &match_metric_cmd);
install_element (RMAP_NODE, &no_match_metric_cmd);
install_element (RMAP_NODE, &no_match_metric_val_cmd);
+ install_element (RMAP_NODE, &match_local_pref_cmd);
+ install_element (RMAP_NODE, &no_match_local_pref_cmd);
+ install_element (RMAP_NODE, &no_match_local_pref_val_cmd);
install_element (RMAP_NODE, &match_community_cmd);
install_element (RMAP_NODE, &match_community_exact_cmd);
install_element (RMAP_NODE, &no_match_community_cmd);
diff --git a/doc/routemap.texi b/doc/routemap.texi
index 7938c96..b3ef7ca 100644
--- a/doc/routemap.texi
+++ b/doc/routemap.texi
@@ -151,6 +151,10 @@
Matches the specified @var{metric}.
@end deffn
+@deffn {Route-map Command} {match local-preference @var{metric}} {}
+Matches the specified @var{local-preference}.
+@end deffn
+
@deffn {Route-map Command} {match community @var{community_list}} {}
Matches the specified @var{community_list}
@end deffn