Merge pull request #12187 from mjstapp/mjs_fix_bgp_allowas

[mirror_frr.git] / bgpd / bgp_nexthop.h

diff --git a/bgpd/bgp_nexthop.h b/bgpd/bgp_nexthop.h
index a223ff4133dc17f75e9b5008ac8c15d4d8f54d52..efad906d0a90df2ac97e2ea83905841a34376ff5 100644 (file)
--- a/bgpd/bgp_nexthop.h
+++ b/bgpd/bgp_nexthop.h
@@ -41,6 +41,9 @@ PREDECL_RBTREE_UNIQ(bgp_nexthop_cache);
 
 /* BGP nexthop cache value structure. */
 struct bgp_nexthop_cache {
+       /* The ifindex of the outgoing interface *if* it's a v6 LL */
+       ifindex_t ifindex;
+
        /* RB-tree entry. */
        struct bgp_nexthop_cache_item entry;
 
@@ -53,6 +56,10 @@ struct bgp_nexthop_cache {
        time_t last_update;
        uint16_t flags;
 
+/*
+ * If the nexthop is EVPN gateway IP NH, VALID flag is set only if the nexthop
+ * is RIB reachable as well as MAC/IP is present
+ */
 #define BGP_NEXTHOP_VALID             (1 << 0)
 #define BGP_NEXTHOP_REGISTERED        (1 << 1)
 #define BGP_NEXTHOP_CONNECTED         (1 << 2)
@@ -61,11 +68,29 @@ struct bgp_nexthop_cache {
 #define BGP_STATIC_ROUTE_EXACT_MATCH  (1 << 5)
 #define BGP_NEXTHOP_LABELED_VALID     (1 << 6)
 
+/*
+ * This flag is added for EVPN gateway IP nexthops.
+ * If the nexthop is RIB reachable, but a MAC/IP is not yet
+ * resolved, this flag is set.
+ * Following table explains the combination of L3 and L2 reachability w.r.t.
+ * VALID and INCOMPLETE flags
+ *
+ *                | MACIP resolved | MACIP unresolved
+ *----------------|----------------|------------------
+ * L3 reachable   | VALID      = 1 | VALID      = 0
+ *                | INCOMPLETE = 0 | INCOMPLETE = 1
+ * ---------------|----------------|--------------------
+ * L3 unreachable | VALID      = 0 | VALID      = 0
+ *                | INCOMPLETE = 0 | INCOMPLETE = 0
+ */
+#define BGP_NEXTHOP_EVPN_INCOMPLETE (1 << 7)
+
        uint16_t change_flags;
 
 #define BGP_NEXTHOP_CHANGED           (1 << 0)
 #define BGP_NEXTHOP_METRIC_CHANGED    (1 << 1)
 #define BGP_NEXTHOP_CONNECTED_CHANGED (1 << 2)
+#define BGP_NEXTHOP_MACIP_CHANGED (1 << 3)
 
        /* Back pointer to the cache tree this entry belongs to. */
        struct bgp_nexthop_cache_head *tree;
@@ -76,6 +101,11 @@ struct bgp_nexthop_cache {
        LIST_HEAD(path_list, bgp_path_info) paths;
        unsigned int path_count;
        struct bgp *bgp;
+
+       /* This flag is set to TRUE for a bnc that is gateway IP overlay index
+        * nexthop.
+        */
+       bool is_evpn_gwip_nexthop;
 };
 
 extern int bgp_nexthop_cache_compare(const struct bgp_nexthop_cache *a,
@@ -122,14 +152,15 @@ extern bool bgp_nexthop_self(struct bgp *bgp, afi_t afi, uint8_t type,
                             struct bgp_dest *dest);
 extern struct bgp_nexthop_cache *bnc_new(struct bgp_nexthop_cache_head *tree,
                                         struct prefix *prefix,
-                                        uint32_t srte_color);
+                                        uint32_t srte_color,
+                                        ifindex_t ifindex);
 extern bool bnc_existing_for_prefix(struct bgp_nexthop_cache *bnc);
 extern void bnc_free(struct bgp_nexthop_cache *bnc);
 extern struct bgp_nexthop_cache *bnc_find(struct bgp_nexthop_cache_head *tree,
                                          struct prefix *prefix,
-                                         uint32_t srte_color);
+                                         uint32_t srte_color,
+                                         ifindex_t ifindex);
 extern void bnc_nexthop_free(struct bgp_nexthop_cache *bnc);
-extern const char *bnc_str(struct bgp_nexthop_cache *bnc, char *buf, int size);
 extern void bgp_scan_init(struct bgp *bgp);
 extern void bgp_scan_finish(struct bgp *bgp);
 extern void bgp_scan_vty_init(void);