bfdd: add check for flag M

Signed-off-by: zmw12306 <[email protected]>
FRRouting · Apr 12, 2024 · 665ec41 · 665ec41
1 parent 9b96394
commit 665ec41
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Showing 2 changed files with 8 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
@@ -862,6 +862,12 @@ void bfd_recv_cb(struct event *t)
 		return;
 	}
 
+	if (BFD_GETMBIT(cp->flags)) {
+		cp_debug(is_mhop, &peer, &local, ifindex, vrfid,
+			 "detect non-zero Multipoint (M) flag");
+		return;
+	}
+
 	if (cp->discrs.my_discr == 0) {
 		cp_debug(is_mhop, &peer, &local, ifindex, vrfid,
 			 "'my discriminator' is zero");