Apply by doing:
cd /usr/src
patch -p0 < 009_bgpd.patch
And then rebuild and install bgpd:
cd usr.sbin/bgpd
make depend
make
make install
Index: usr.sbin/bgpd/rde.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/rde.c,v
retrieving revision 1.230
diff -u -p -r1.230 rde.c
--- usr.sbin/bgpd/rde.c 26 Feb 2008 19:58:51 -0000 1.230
+++ usr.sbin/bgpd/rde.c 30 Jan 2009 14:31:23 -0000
@@ -792,8 +792,10 @@ rde_update_dispatch(struct imsg *imsg)
/*
* if either ATTR_NEW_AGGREGATOR or ATTR_NEW_ASPATH is present
* try to fixup the attributes.
+ * XXX do not fixup if F_ATTR_LOOP is set.
*/
- if (asp->flags & F_ATTR_AS4BYTE_NEW)
+ if (asp->flags & F_ATTR_AS4BYTE_NEW &&
+ !(asp->flags & F_ATTR_LOOP))
rde_as4byte_fixup(peer, asp);
/* enforce remote AS if requested */
@@ -1163,14 +1165,14 @@ bad_len:
if (!CHECK_FLAGS(flags, ATTR_WELL_KNOWN, 0)) {
bad_flags:
rde_update_err(peer, ERR_UPDATE, ERR_UPD_ATTRFLAGS,
- op, attr_len);
+ op, len);
return (-1);
}
UPD_READ(&a->origin, p, plen, 1);
if (a->origin > ORIGIN_INCOMPLETE) {
rde_update_err(peer, ERR_UPDATE, ERR_UPD_ORIGIN,
- op, attr_len);
+ op, len);
return (-1);
}
if (a->flags & F_ATTR_ORIGIN)
@@ -1217,7 +1219,7 @@ bad_flags:
tmp32 = ntohl(nexthop.v4.s_addr);
if (IN_MULTICAST(tmp32) || IN_BADCLASS(tmp32)) {
rde_update_err(peer, ERR_UPDATE, ERR_UPD_NETWORK,
- op, attr_len);
+ op, len);
return (-1);
}
a->nexthop = nexthop_get(&nexthop);
@@ -1342,10 +1344,16 @@ bad_flags:
ATTR_PARTIAL))
goto bad_flags;
if (aspath_verify(p, attr_len, 1) != 0) {
- /* XXX draft does not specify how to handle errors */
- rde_update_err(peer, ERR_UPDATE, ERR_UPD_ASPATH,
- NULL, 0);
- return (-1);
+ /*
+ * XXX RFC does not specify how to handle errors.
+ * XXX Instead of dropping the session because of a
+ * XXX bad path just mark the full update as not
+ * XXX loop-free the update is no longer eligible and
+ * XXX will not be considered for routing or
+ * XXX redistribution. Something better is needed.
+ */
+ a->flags |= F_ATTR_LOOP;
+ goto optattr;
}
a->flags |= F_ATTR_AS4BYTE_NEW;
goto optattr;
