SCTP: use custom fib

Following TCP fixes from Florin (11430), this patch follows the same
approach to indicate a fib (not just using the default one).

Change-Id: Ib883aa0e9a1c6157acfea69c44426ba07d6c932a
Signed-off-by: Marco Varlese <marco.varlese@suse.com>
diff --git a/src/vnet/sctp/sctp_input.c b/src/vnet/sctp/sctp_input.c
index 5691f0f..bc36a7f 100644
--- a/src/vnet/sctp/sctp_input.c
+++ b/src/vnet/sctp/sctp_input.c
@@ -1670,6 +1670,9 @@
 	  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU =
 	    sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU;
 	  child_conn->state = SCTP_STATE_CLOSED;
+	  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index =
+	    sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].
+	    connection.fib_index;
 
 	  if (is_ip4)
 	    {