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-rw-r--r--proto/bfd/packets.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/proto/bfd/packets.c b/proto/bfd/packets.c
index 5f10734c..cb5f0d89 100644
--- a/proto/bfd/packets.c
+++ b/proto/bfd/packets.c
@@ -374,6 +374,10 @@ bfd_rx_hook(sock *sk, uint len)
/* FIXME: better session matching and message */
if (!s)
return 1;
+
+ /* For active sessions we require matching remote id */
+ if ((s->loc_state == BFD_STATE_UP) && (ntohl(pkt->snd_id) != s->rem_id))
+ DROP("mismatched remote id", ntohl(pkt->snd_id));
}
/* bfd_check_authentication() has its own error logging */