summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--bgpd/bgp_ecommunity.h20
-rw-r--r--bgpd/bgp_routemap.c151
2 files changed, 171 insertions, 0 deletions
diff --git a/bgpd/bgp_ecommunity.h b/bgpd/bgp_ecommunity.h
index 7d6745e912..d4f75d4a08 100644
--- a/bgpd/bgp_ecommunity.h
+++ b/bgpd/bgp_ecommunity.h
@@ -151,6 +151,26 @@ static inline void encode_route_target_as4(as_t as, uint16_t val,
eval->val[7] = val & 0xff;
}
+/*
+ * Encode BGP Link Bandwidth extended community
+ * bandwidth (bw) is in bytes-per-sec
+ */
+static inline void encode_lb_extcomm(as_t as, uint32_t bw, bool non_trans,
+ struct ecommunity_val *eval)
+{
+ memset(eval, 0, sizeof(*eval));
+ eval->val[0] = ECOMMUNITY_ENCODE_AS;
+ if (non_trans)
+ eval->val[0] |= ECOMMUNITY_FLAG_NON_TRANSITIVE;
+ eval->val[1] = ECOMMUNITY_LINK_BANDWIDTH;
+ eval->val[2] = (as >> 8) & 0xff;
+ eval->val[3] = as & 0xff;
+ eval->val[4] = (bw >> 24) & 0xff;
+ eval->val[5] = (bw >> 16) & 0xff;
+ eval->val[6] = (bw >> 8) & 0xff;
+ eval->val[7] = bw & 0xff;
+}
+
extern void ecommunity_init(void);
extern void ecommunity_finish(void);
extern void ecommunity_free(struct ecommunity **);
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index 2d92136450..2be49bbc00 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -2531,6 +2531,106 @@ static const struct route_map_rule_cmd route_set_ecommunity_soo_cmd = {
route_set_ecommunity_free,
};
+/* `set extcommunity bandwidth' */
+
+struct rmap_ecomm_lb_set {
+ uint8_t lb_type;
+#define RMAP_ECOMM_LB_SET_VALUE 1
+#define RMAP_ECOMM_LB_SET_CUMUL 2
+#define RMAP_ECOMM_LB_SET_NUM_MPATH 3
+ bool non_trans;
+ uint32_t bw;
+};
+
+static enum route_map_cmd_result_t
+route_set_ecommunity_lb(void *rule, const struct prefix *prefix,
+ route_map_object_t type, void *object)
+{
+ struct rmap_ecomm_lb_set *rels = rule;
+ struct bgp_path_info *path;
+ struct peer *peer;
+ struct ecommunity ecom_lb = {0};
+ struct ecommunity_val lb_eval;
+ uint32_t bw_bytes = 0;
+ struct ecommunity *new_ecom;
+ struct ecommunity *old_ecom;
+ as_t as;
+
+ if (type != RMAP_BGP)
+ return RMAP_OKAY;
+
+ path = object;
+ peer = path->peer;
+ if (!peer || !peer->bgp)
+ return RMAP_ERROR;
+
+ /* Build link bandwidth extended community */
+ as = (peer->bgp->as > BGP_AS_MAX) ? BGP_AS_TRANS : peer->bgp->as;
+ if (rels->lb_type == RMAP_ECOMM_LB_SET_VALUE)
+ bw_bytes = ((uint64_t)(rels->bw * 1000 * 1000))/8;
+
+ encode_lb_extcomm(as, bw_bytes, rels->non_trans, &lb_eval);
+ ecom_lb.size = 1;
+ ecom_lb.val = (uint8_t *)lb_eval.val;
+
+ /* add to route or merge with existing */
+ old_ecom = path->attr->ecommunity;
+ if (old_ecom) {
+ new_ecom = ecommunity_merge(ecommunity_dup(old_ecom), &ecom_lb);
+ if (!old_ecom->refcnt)
+ ecommunity_free(&old_ecom);
+ } else
+ new_ecom = ecommunity_dup(&ecom_lb);
+
+ /* new_ecom will be intern()'d or attr_flush()'d in call stack */
+ path->attr->ecommunity = new_ecom;
+ path->attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES);
+
+
+ return RMAP_OKAY;
+}
+
+static void *route_set_ecommunity_lb_compile(const char *arg)
+{
+ struct rmap_ecomm_lb_set *rels;
+ uint8_t lb_type;
+ uint32_t bw = 0;
+
+ if (strcmp(arg, "cumulative") == 0)
+ lb_type = RMAP_ECOMM_LB_SET_CUMUL;
+ else if (strcmp(arg, "num-multipaths") == 0)
+ lb_type = RMAP_ECOMM_LB_SET_NUM_MPATH;
+ else {
+ char *end = NULL;
+
+ bw = strtoul(arg, &end, 10);
+ if (*end != '\0')
+ return NULL;
+ lb_type = RMAP_ECOMM_LB_SET_VALUE;
+ }
+
+ rels = XCALLOC(MTYPE_ROUTE_MAP_COMPILED,
+ sizeof(struct rmap_ecomm_lb_set));
+ rels->lb_type = lb_type;
+ rels->bw = bw;
+ rels->non_trans = false;
+
+ return rels;
+}
+
+static void route_set_ecommunity_lb_free(void *rule)
+{
+ XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+/* Set community rule structure. */
+struct route_map_rule_cmd route_set_ecommunity_lb_cmd = {
+ "extcommunity bandwidth",
+ route_set_ecommunity_lb,
+ route_set_ecommunity_lb_compile,
+ route_set_ecommunity_lb_free,
+};
+
/* `set origin ORIGIN' */
/* For origin set. */
@@ -5004,6 +5104,53 @@ ALIAS (no_set_ecommunity_soo,
"GP extended community attribute\n"
"Site-of-Origin extended community\n")
+DEFUN (set_ecommunity_lb,
+ set_ecommunity_lb_cmd,
+ "set extcommunity bandwidth <(1-25600)|cumulative|num-multipaths> [non-transitive]",
+ SET_STR
+ "BGP extended community attribute\n"
+ "Link bandwidth extended community\n"
+ "Bandwidth value in Mbps\n"
+ "Cumulative bandwidth of all multipaths (outbound-only)\n"
+ "Internally computed bandwidth based on number of multipaths (outbound-only)\n"
+ "Attribute is set as non-transitive\n")
+{
+ int idx_lb = 3;
+ int ret;
+ char *str;
+
+ str = argv_concat(argv, argc, idx_lb);
+ ret = generic_set_add(vty, VTY_GET_CONTEXT(route_map_index),
+ "extcommunity bandwidth", str);
+ XFREE(MTYPE_TMP, str);
+ return ret;
+}
+
+
+DEFUN (no_set_ecommunity_lb,
+ no_set_ecommunity_lb_cmd,
+ "no set extcommunity bandwidth <(1-25600)|cumulative|num-multipaths> [non-transitive]",
+ NO_STR
+ SET_STR
+ "BGP extended community attribute\n"
+ "Link bandwidth extended community\n"
+ "Bandwidth value in Mbps\n"
+ "Cumulative bandwidth of all multipaths (outbound-only)\n"
+ "Internally computed bandwidth based on number of multipaths (outbound-only)\n"
+ "Attribute is set as non-transitive\n")
+{
+ return generic_set_delete(vty, VTY_GET_CONTEXT(route_map_index),
+ "extcommunity bandwidth", NULL);
+}
+
+ALIAS (no_set_ecommunity_lb,
+ no_set_ecommunity_lb_short_cmd,
+ "no set extcommunity bandwidth",
+ NO_STR
+ SET_STR
+ "BGP extended community attribute\n"
+ "Link bandwidth extended community\n")
+
DEFUN (set_origin,
set_origin_cmd,
"set origin <egp|igp|incomplete>",
@@ -5549,6 +5696,7 @@ void bgp_route_map_init(void)
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_ecommunity_lb_cmd);
route_map_install_set(&route_set_tag_cmd);
route_map_install_set(&route_set_label_index_cmd);
@@ -5632,6 +5780,9 @@ void bgp_route_map_init(void)
install_element(RMAP_NODE, &set_ecommunity_soo_cmd);
install_element(RMAP_NODE, &no_set_ecommunity_soo_cmd);
install_element(RMAP_NODE, &no_set_ecommunity_soo_short_cmd);
+ install_element(RMAP_NODE, &set_ecommunity_lb_cmd);
+ install_element(RMAP_NODE, &no_set_ecommunity_lb_cmd);
+ install_element(RMAP_NODE, &no_set_ecommunity_lb_short_cmd);
#ifdef KEEP_OLD_VPN_COMMANDS
install_element(RMAP_NODE, &set_vpn_nexthop_cmd);
install_element(RMAP_NODE, &no_set_vpn_nexthop_cmd);
generated by cgit v1.2.3 (git 2.39.1) at 2025-11-25 21:48:10 +0000