Merge pull request #74 from westermo/silence-mrdisc

mrdisc: Ignore send() error messages on link down
troglobit · Jun 7, 2017 · 9d6b55a · 9d6b55a
2 parents 11b5438 + bb424f1
commit 9d6b55a
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/mrdisc.c b/src/mrdisc.c
@@ -62,9 +62,13 @@ static void announce(struct ifsock *entry)
 		return;
 
 	smclog(LOG_DEBUG, "Sending mrdisc announcement on %s", entry->ifname);
-	if (inet_send(entry->sd, IGMP_MRDISC_ANNOUNCE, interval))
-		smclog(LOG_WARNING, "Failed sending IGMP control message 0x%x on %s",
-		       IGMP_MRDISC_ANNOUNCE, entry->ifname);
+	if (inet_send(entry->sd, IGMP_MRDISC_ANNOUNCE, interval)) {
+		if (ENETUNREACH == errno || ENETDOWN == errno)
+			return;	/* Link down, ignore. */
+
+		smclog(LOG_WARNING, "Failed sending IGMP control message 0x%x on %s, error %d: %s",
+		       IGMP_MRDISC_ANNOUNCE, entry->ifname, errno, strerror(errno));
+	}
 }
 
 int mrdisc_init(int period)