bfdd: Add check for flag Multipoint (M)

Signed-off-by: zmw12306 <[email protected]>
zmw12306 · Apr 7, 2024 · cd09bd4 · cd09bd4
1 parent 9b96394
commit cd09bd4
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Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/bfdd/bfd.h b/bfdd/bfd.h
@@ -89,6 +89,8 @@ struct bfd_echo_pkt {
 #define BFD_CBIT 0x08
 #define BFD_ABIT 0x04
 #define BFD_DEMANDBIT 0x02
+#define BFD_MBIT 0x01
+#define BFD_GETMBIT(flags) (flags & BFD_MBIT)
 #define BFD_SETDEMANDBIT(flags, val)                                           \
 	{                                                                      \
 		if ((val))                                                     \

diff --git a/bfdd/bfd_packet.c b/bfdd/bfd_packet.c
@@ -959,6 +959,11 @@ void bfd_recv_cb(struct event *t)
 		bs_final_handler(bfd);
 	}
 
+	if (BFD_GETMBIT(cp->flags)) {
+		/* Check non-zero Flag Multipoint (M) */
+		cp_debug(is_mhop, &peer, &local, ifindex, vrfid, "detect non-zero Multipoint (M) flag");
+		return;
+	}
 	/*
 	 * Detection timeout calculation:
 	 * The minimum detection timeout is the remote detection