BGP multipath support

Kernel option 'merge paths' allows to merge routes exported to kernel
protocol (currently BGP and static routes) to multipath routes.

1 files changed, 3 insertions, 0 deletions

diff --git a/nest/protocol.h b/nest/protocol.h
index a51e9afd..8c49154f 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -158,6 +158,7 @@ struct proto {
   byte gr_wait;				/* Route export to protocol is postponed until graceful restart */
   byte down_sched;			/* Shutdown is scheduled for later (PDS_*) */
   byte down_code;			/* Reason for shutdown (PDC_* codes) */
+  byte merge_limit;			/* Maximal number of nexthops for RA_MERGED */
   u32 hash_key;				/* Random key used for hashing of neighbors */
   bird_clock_t last_state_change;	/* Time of last state transition */
   char *last_state_name_announced;	/* Last state name we've announced to the user */
@@ -200,6 +201,7 @@ struct proto {
    *	   rte_recalculate Called at the beginning of the best route selection
    *	   rte_better	Compare two rte's and decide which one is better (1=first, 0=second).
    *       rte_same	Compare two rte's and decide whether they are identical (1=yes, 0=no).
+   *       rte_mergable	Compare two rte's and decide whether they could be merged (1=yes, 0=no).
    *	   rte_insert	Called whenever a rte is inserted to a routing table.
    *	   rte_remove	Called whenever a rte is removed from the routing table.
    */
@@ -207,6 +209,7 @@ struct proto {
   int (*rte_recalculate)(struct rtable *, struct network *, struct rte *, struct rte *, struct rte *);
   int (*rte_better)(struct rte *, struct rte *);
   int (*rte_same)(struct rte *, struct rte *);
+  int (*rte_mergable)(struct rte *, struct rte *);
   void (*rte_insert)(struct network *, struct rte *);
   void (*rte_remove)(struct network *, struct rte *);