Apply by doing:
cd /usr/src
patch -p0 < 016_dhcpd.patch
And then rebuild and install file:
cd usr.sbin/dhcpd
make obj
make cleandir
make depend
make
make install
Index: usr.sbin/dhcpd/options.c
===================================================================
RCS file: /cvs/src/usr.sbin/dhcpd/options.c,v
retrieving revision 1.6
retrieving revision 1.6.8.1
diff -u -p -r1.6 -r1.6.8.1
--- usr.sbin/dhcpd/options.c 21 Sep 2004 04:07:04 -0000 1.6
+++ usr.sbin/dhcpd/options.c 9 Oct 2007 16:44:55 -0000 1.6.8.1
@@ -1,4 +1,4 @@
-/* $OpenBSD: options.c,v 1.6 2004/09/21 04:07:04 david Exp $ */
+/* $OpenBSD: options.c,v 1.6.8.1 2007/10/09 16:44:55 ckuethe Exp $ */
/* DHCP options parsing and reassembly. */
@@ -225,9 +225,12 @@ cons_options(struct packet *inpacket, st
inpacket &&
inpacket->options[DHO_DHCP_MAX_MESSAGE_SIZE].data &&
(inpacket->options[DHO_DHCP_MAX_MESSAGE_SIZE].len >=
- sizeof(u_int16_t)))
+ sizeof(u_int16_t))) {
mms = getUShort(
inpacket->options[DHO_DHCP_MAX_MESSAGE_SIZE].data);
+ if (mms < 576)
+ mms = 576; /* mms must be >= minimum IP MTU */
+ }
if (mms)
main_buffer_size = mms - DHCP_FIXED_LEN;
