bgpd, vtysh: Add support for route tags
[Forward ported by Cumulus]
Documentation
-------------
All ipv4 and ipv6 static route commands now have a "tag" option
which allows the user to set a tag between 1 and 65535.
quagga(config)# ip route 1.1.1.1/32 10.1.1.1 tag ?
<1-65535> Tag value
quagga(config)# ip route 1.1.1.1/32 10.1.1.1 tag 40
quagga(config)#
quagga# show ip route 1.1.1.1/32
Routing entry for 1.1.1.1/32
Known via "static", distance 1, metric 0, tag 40, best
* 10.1.1.1, via swp1
quagga#
The route-map parser supports matching on tags and setting tags
!
route-map MATCH_TAG_18 permit 10
match tag 18
!
!
route-map SET_TAG_22 permit 10
set tag 22
!
BGP and OSPF support:
- matching on tags when redistribing routes from the RIB into BGP/OSPF.
- setting tags when redistribing routes from the RIB into BGP/OSPF.
BGP also supports setting a tag via a table-map, when installing BGP
routes into the RIB.
Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Signed-off-by: Piotr Chytla <pch@packetconsulting.pl>
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Edits by: Paul Jakma <paul.jakma@hpe.com - conflicts on re-ordering with the
rmap-event and table-map patches, those will now need to update the tags stuff.
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index a9b6b50..204644a 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -71,7 +71,7 @@
length : (This will not be implemented by bgpd)
metric : Done
route-type : (This will not be implemented by bgpd)
- tag : (This will not be implemented by bgpd)
+ tag : Done
local-preference : Done
set as-path prepend : Done
@@ -91,7 +91,7 @@
metric : Done
metric-type : Not yet
origin : Done
- tag : (This will not be implemented by bgpd)
+ tag : Done
weight : Done
o Local extensions
@@ -1004,6 +1004,72 @@
/* `set ip next-hop IP_ADDRESS' */
+/* Match function return 1 if match is success else return zero. */
+static route_map_result_t
+route_match_tag (void *rule, struct prefix *prefix,
+ route_map_object_t type, void *object)
+{
+ u_short *tag;
+ struct bgp_info *bgp_info;
+
+ if (type == RMAP_BGP)
+ {
+ tag = rule;
+ bgp_info = object;
+
+ if (!bgp_info->attr->extra)
+ return RMAP_NOMATCH;
+
+ return ((bgp_info->attr->extra->tag == *tag)? RMAP_MATCH : RMAP_NOMATCH);
+ }
+
+ return RMAP_NOMATCH;
+}
+
+
+/* Route map `match tag' match statement. `arg' is TAG value */
+static void *
+route_match_tag_compile (const char *arg)
+{
+ u_short *tag;
+ u_short tmp;
+
+ /* tag value shoud be integer. */
+ if (! all_digit (arg))
+ return NULL;
+
+ tmp = atoi(arg);
+ if (tmp < 1)
+ return NULL;
+
+ tag = XMALLOC (MTYPE_ROUTE_MAP_COMPILED, sizeof (u_short));
+
+ if (!tag)
+ return tag;
+
+ *tag = tmp;
+
+ return tag;
+}
+
+
+/* Free route map's compiled 'match tag' value. */
+static void
+route_match_tag_free (void *rule)
+{
+ XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+/* Route map commands for tag matching. */
+struct route_map_rule_cmd route_match_tag_cmd =
+{
+ "tag",
+ route_match_tag,
+ route_match_tag_compile,
+ route_match_tag_free,
+};
+
+
/* Set nexthop to object. ojbect must be pointer to struct attr. */
struct rmap_ip_nexthop_set
{
@@ -1777,6 +1843,73 @@
route_set_aggregator_as_free,
};
+/* Set tag to object. object must be pointer to struct bgp_info */
+static route_map_result_t
+route_set_tag (void *rule, struct prefix *prefix,
+ route_map_object_t type, void *object)
+{
+ u_short *tag;
+ struct bgp_info *bgp_info;
+ struct attr_extra *ae;
+
+ if (type == RMAP_BGP)
+ {
+ tag = rule;
+ bgp_info = object;
+ ae = bgp_attr_extra_get (bgp_info->attr);
+
+ /* Set tag value */
+ ae->tag=*tag;
+
+ }
+
+ return RMAP_OKAY;
+}
+
+/* Route map `tag' compile function. Given string is converted to u_short. */
+static void *
+route_set_tag_compile (const char *arg)
+{
+ u_short *tag;
+ u_short tmp;
+
+ /* tag value shoud be integer. */
+ if (! all_digit (arg))
+ return NULL;
+
+ tmp = atoi(arg);
+
+ if (tmp < 1)
+ return NULL;
+
+ tag = XMALLOC (MTYPE_ROUTE_MAP_COMPILED, sizeof (u_short));
+
+ if (!tag)
+ return tag;
+
+ *tag = tmp;
+
+ return tag;
+}
+
+/* Free route map's tag value. */
+static void
+route_set_tag_free (void *rule)
+{
+ XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+
+/* Route map commands for tag set. */
+struct route_map_rule_cmd route_set_tag_cmd =
+{
+ "tag",
+ route_set_tag,
+ route_set_tag_compile,
+ route_set_tag_free,
+};
+
+
/* `match ipv6 address IP_ACCESS_LIST' */
static route_map_result_t
@@ -2998,6 +3131,37 @@
"local IGP\n"
"unknown heritage\n")
+DEFUN (match_tag,
+ match_tag_cmd,
+ "match tag <1-65535>",
+ MATCH_STR
+ "Match tag of route\n"
+ "Tag value\n")
+{
+ return bgp_route_match_add (vty, vty->index, "tag", argv[0]);
+}
+
+DEFUN (no_match_tag,
+ no_match_tag_cmd,
+ "no match tag",
+ NO_STR
+ MATCH_STR
+ "Match tag of route\n")
+{
+ if (argc == 0)
+ return bgp_route_match_delete (vty, vty->index, "tag", NULL);
+
+ return bgp_route_match_delete (vty, vty->index, "tag", argv[0]);
+}
+
+ALIAS (no_match_tag,
+ no_match_tag_val_cmd,
+ "no match tag <1-65535>",
+ NO_STR
+ MATCH_STR
+ "Match tag of route\n"
+ "Tag value\n")
+
DEFUN (set_ip_nexthop,
set_ip_nexthop_cmd,
"set ip next-hop A.B.C.D",
@@ -3663,6 +3827,38 @@
"AS number\n"
"IP address of aggregator\n")
+DEFUN (set_tag,
+ set_tag_cmd,
+ "set tag <1-65535>",
+ SET_STR
+ "Tag value for routing protocol\n"
+ "Tag value\n")
+{
+ return bgp_route_set_add (vty, vty->index, "tag", argv[0]);
+}
+
+DEFUN (no_set_tag,
+ no_set_tag_cmd,
+ "no set tag",
+ NO_STR
+ SET_STR
+ "Tag value for routing protocol\n")
+{
+ if (argc == 0)
+ bgp_route_set_delete(vty, vty->index, "tag", NULL);
+
+ return bgp_route_set_delete (vty, vty->index, "tag", argv[0]);
+}
+
+ALIAS (no_set_tag,
+ no_set_tag_val_cmd,
+ "no set tag <1-65535>",
+ NO_STR
+ SET_STR
+ "Tag value for routing protocol\n"
+ "Tag value\n")
+
+
DEFUN (match_ipv6_address,
match_ipv6_address_cmd,
"match ipv6 address WORD",
@@ -3979,6 +4175,7 @@
route_map_install_match (&route_match_metric_cmd);
route_map_install_match (&route_match_origin_cmd);
route_map_install_match (&route_match_probability_cmd);
+ route_map_install_match (&route_match_tag_cmd);
route_map_install_set (&route_set_ip_nexthop_cmd);
route_map_install_set (&route_set_local_pref_cmd);
@@ -3995,6 +4192,7 @@
route_map_install_set (&route_set_originator_id_cmd);
route_map_install_set (&route_set_ecommunity_rt_cmd);
route_map_install_set (&route_set_ecommunity_soo_cmd);
+ route_map_install_set (&route_set_tag_cmd);
install_element (RMAP_NODE, &match_peer_cmd);
install_element (RMAP_NODE, &match_peer_local_cmd);
@@ -4043,6 +4241,9 @@
install_element (RMAP_NODE, &match_probability_cmd);
install_element (RMAP_NODE, &no_match_probability_cmd);
install_element (RMAP_NODE, &no_match_probability_val_cmd);
+ install_element (RMAP_NODE, &match_tag_cmd);
+ install_element (RMAP_NODE, &no_match_tag_cmd);
+ install_element (RMAP_NODE, &no_match_tag_val_cmd);
install_element (RMAP_NODE, &set_ip_nexthop_cmd);
install_element (RMAP_NODE, &set_ip_nexthop_peer_cmd);
@@ -4094,6 +4295,9 @@
install_element (RMAP_NODE, &set_originator_id_cmd);
install_element (RMAP_NODE, &no_set_originator_id_cmd);
install_element (RMAP_NODE, &no_set_originator_id_val_cmd);
+ install_element (RMAP_NODE, &set_tag_cmd);
+ install_element (RMAP_NODE, &no_set_tag_cmd);
+ install_element (RMAP_NODE, &no_set_tag_val_cmd);
route_map_install_match (&route_match_ipv6_address_cmd);
route_map_install_match (&route_match_ipv6_next_hop_cmd);