Date: Fri, 26 Sep 2003 16:23:49 +0100 From: Bruce M Simpson <bms@spc.org> To: freebsd-net@freebsd.org Subject: Alternative fix for FreeBSD-SA-03:14.arp Message-ID: <20030926152349.GI662@saboteur.dek.spc.org>
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[-- Attachment #1 --]
Hi,
Based on discussion between ru@ and I, there's a patch attached which
tries to fix the problem without deleting GENMASK routes, and is
stricter about not touching STATIC routes.
Comments and reviews solicited, appreciated...
Thanks!
BMS
[-- Attachment #2 --]
--- if_ether.c.orig Mon Sep 22 21:11:59 2003
+++ if_ether.c Fri Sep 26 13:43:20 2003
@@ -922,9 +922,19 @@
if (why && create) {
log(LOG_DEBUG, "arplookup %s failed: %s\n",
inet_ntoa(sin.sin_addr), why);
- return 0;
+
+ if ((rt->rt_refcnt == 0) &&
+ (rt->rt_flags & RTF_STATIC) == 0 &&
+ (rt->rt_flags & (RTF_HOST|RTF_WASCLONED)) ==
+ (RTF_HOST|RTF_WASCLONED)) {
+ rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
+ rt->rt_gateway, rt_mask(rt),
+ rt->rt_flags, 0);
+ }
+
+ return (0);
} else if (why) {
- return 0;
+ return (0);
}
return ((struct llinfo_arp *)rt->rt_llinfo);
}
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