towards SA-2003.012-dhcpd; CAN-2003-0039

dhcpd/dhcpd.patch

@@ -0,0 +1,53 @@
+--- relay/dhcrelay.c-orig	Sat Apr 27 05:34:20 2002
++++ relay/dhcrelay.c	Wed Feb 19 12:44:19 2003
+@@ -88,6 +88,7 @@
+ 				   did not match any known circuit ID. */
+ int missing_circuit_id = 0;	/* Circuit ID option in matching RAI option
+ 				   was missing. */
++int max_hop_count = 4;	/* Maximum hop count */
+ 
+ 	/* Maximum size of a packet with agent options added. */
+ int dhcp_max_agent_option_packet_length = 576;
+@@ -182,6 +183,15 @@
+ 			quiet_interface_discovery = 1;
+ 		} else if (!strcmp (argv [i], "-a")) {
+ 			add_agent_options = 1;
++		} else if (!strcmp (argv [i], "-c")) {
++			int	hcount;	
++			if (++i == argc)
++				usage ();
++			hcount = atoi(argv[i]);	
++			if (hcount <= 16)
++				max_hop_count = hcount;
++			else
++				usage ();
+ 		} else if (!strcmp (argv [i], "-A")) {
+ 			if (++i == argc)
+ 				usage ();
+@@ -425,6 +435,17 @@
+ 		packet -> giaddr = ip -> primary_address;
+ 	if (packet -> hops != 255)
+ 		packet -> hops = packet -> hops + 1;
++
++   /*  ftp://ftp.rfc-editor.org/in-notes/rfc1542.txt
++    *  4.1.1 BOOTREQUEST Messages
++    *  The relay agent MUST silently discard BOOTREQUEST messages whose
++    *  'hops' field exceeds the value 16.  A configuration option SHOULD be
++    *  provided to set this threshold to a smaller value if desired by the
++    *  network manager.  The default setting for a configurable threshold
++    *  SHOULD be 4.
++    */
++	if (packet -> hops >= max_hop_count)
++		return;
+ 
+ 	/* Otherwise, it's a BOOTREQUEST, so forward it to all the
+ 	   servers. */
+@@ -470,7 +470,7 @@
+ static void usage ()
+ {
+ 	log_fatal ("Usage: dhcrelay [-p <port>] [-d] [-D] [-i %s%s%s",
+-	       "interface]\n                ",
++	       "interface] [-c max_hop_count]\n                ",
+ 	       "[-q] [-a] [-A length] [-m append|replace|forward|discard]\n",
+ 	       "                [server1 [... serverN]]");
+ }

dhcpd/dhcpd.spec

@@ -33,12 +33,13 @@ Distribution: OpenPKG [BASE]
 Group:        DNS
 License:      ISC/BSD
 Version:      3.0.1rc11
-Release:      20030116
+Release:      20030219
 
 #   list of sources
 Source0:      ftp://ftp.isc.org/isc/dhcp/dhcp-%{version}.tar.gz
 Source1:      dhcpd.conf
 Source2:      rc.dhcpd
+Patch0:       dhcpd.patch
 
 #   build information
 Prefix:       %{l_prefix}
@@ -53,6 +54,7 @@ AutoReqProv:  no
 
 %prep
     %setup -q -n dhcp-%{version}
+    %patch
 
 %build
     ( echo 'CC           = %{l_cc}'