Log a warning whenever RTM_DESYNC is seen. Thus giving entrail

investigators some clue why dhclient may have gotten confused when
some RTM_ messages vanish.

sthen@ thinks this is a good start.

diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c
index bf7e92d..b5264ce 100644 (file)
--- a/sbin/dhclient/dhclient.c
+++ b/sbin/dhclient/dhclient.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: dhclient.c,v 1.316 2014/07/12 09:04:21 krw Exp $      */
+/*     $OpenBSD: dhclient.c,v 1.317 2014/07/12 21:04:07 krw Exp $      */
 
 /*
  * Copyright 2004 Henning Brauer <henning@openbsd.org>
@@ -228,6 +228,9 @@ routehandler(void)
                goto done;
 
        switch (rtm->rtm_type) {
+       case RTM_DESYNC:
+               warning("route socket buffer overflow");
+               break;
        case RTM_NEWADDR:
                ifam = (struct ifa_msghdr *)rtm;
                if (ifam->ifam_index != ifi->index)