+
+ return prefix_mac2str((struct ethaddr *)en, NULL, 0);
+}
+
+/* Fetch router-mac from extended community */
+void bgp_attr_rmac(struct attr *attr, struct ethaddr *rmac)
+{
+ int i = 0;
+ struct ecommunity *ecom;
+
+ ecom = attr->ecommunity;
+ if (!ecom || !ecom->size)
+ return;
+
+ /* If there is a router mac extended community, set RMAC in attr */
+ for (i = 0; i < ecom->size; i++) {
+ uint8_t *pnt = NULL;
+ uint8_t type = 0;
+ uint8_t sub_type = 0;
+
+ pnt = (ecom->val + (i * ECOMMUNITY_SIZE));
+ type = *pnt++;
+ sub_type = *pnt++;
+
+ if (!(type == ECOMMUNITY_ENCODE_EVPN
+ && sub_type == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC))
+ continue;
+
+ memcpy(rmac, pnt, ETH_ALEN);
+ }
+}
+
+/*
+ * return true if attr contains default gw extended community
+ */
+uint8_t bgp_attr_default_gw(struct attr *attr)
+{
+ struct ecommunity *ecom;
+ int i;
+
+ ecom = attr->ecommunity;
+ if (!ecom || !ecom->size)
+ return 0;
+
+ /* If there is a default gw extendd community return true otherwise
+ * return 0 */
+ for (i = 0; i < ecom->size; i++) {
+ uint8_t *pnt;
+ uint8_t type, sub_type;
+
+ pnt = (ecom->val + (i * ECOMMUNITY_SIZE));
+ type = *pnt++;
+ sub_type = *pnt++;
+
+ if ((type == ECOMMUNITY_ENCODE_OPAQUE
+ && sub_type == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW))
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Fetch and return the sequence number from MAC Mobility extended
+ * community, if present, else 0.
+ */
+uint32_t bgp_attr_mac_mobility_seqnum(struct attr *attr, uint8_t *sticky)
+{
+ struct ecommunity *ecom;
+ int i;
+ uint8_t flags = 0;
+
+ ecom = attr->ecommunity;
+ if (!ecom || !ecom->size)
+ return 0;
+
+ /* If there is a MAC Mobility extended community, return its
+ * sequence number.
+ * TODO: RFC is silent on handling of multiple MAC mobility extended
+ * communities for the same route. We will bail out upon the first
+ * one.
+ */
+ for (i = 0; i < ecom->size; i++) {
+ uint8_t *pnt;
+ uint8_t type, sub_type;
+ uint32_t seq_num;
+
+ pnt = (ecom->val + (i * ECOMMUNITY_SIZE));
+ type = *pnt++;
+ sub_type = *pnt++;
+ if (!(type == ECOMMUNITY_ENCODE_EVPN
+ && sub_type == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY))
+ continue;
+ flags = *pnt++;
+
+ if (flags & ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY)
+ *sticky = 1;
+ else
+ *sticky = 0;
+
+ pnt++;
+ pnt = ptr_get_be32(pnt, &seq_num);
+ (void)pnt; /* consume value */
+ return seq_num;
+ }
+
+ return 0;
+}
+
+/*
+ * return true if attr contains router flag extended community
+ */
+void bgp_attr_evpn_na_flag(struct attr *attr, uint8_t *router_flag)
+{
+ struct ecommunity *ecom;
+ int i;
+ uint8_t val;
+
+ ecom = attr->ecommunity;
+ if (!ecom || !ecom->size)
+ return;
+
+ /* If there is a evpn na extendd community set router_flag */
+ for (i = 0; i < ecom->size; i++) {
+ uint8_t *pnt;
+ uint8_t type, sub_type;
+
+ pnt = (ecom->val + (i * ECOMMUNITY_SIZE));
+ type = *pnt++;
+ sub_type = *pnt++;
+
+ if (type == ECOMMUNITY_ENCODE_EVPN &&
+ sub_type == ECOMMUNITY_EVPN_SUBTYPE_ND) {
+ val = *pnt++;
+ if (val & ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG) {
+ *router_flag = 1;
+ break;
+ }
+ }
+ }