2 changed files with 2 additions and 57 deletions
@ -1,53 +0,0 @@
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--- relay/dhcrelay.c-orig Sat Apr 27 05:34:20 2002
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+++ relay/dhcrelay.c Wed Feb 19 12:44:19 2003
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@@ -88,6 +88,7 @@
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did not match any known circuit ID. */
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int missing_circuit_id = 0; /* Circuit ID option in matching RAI option
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was missing. */
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+int max_hop_count = 4; /* Maximum hop count */
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/* Maximum size of a packet with agent options added. */
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int dhcp_max_agent_option_packet_length = 576;
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@@ -182,6 +183,15 @@
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quiet_interface_discovery = 1;
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} else if (!strcmp (argv [i], "-a")) {
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add_agent_options = 1;
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+ } else if (!strcmp (argv [i], "-c")) {
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+ int hcount;
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+ if (++i == argc)
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+ usage ();
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+ hcount = atoi(argv[i]);
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+ if (hcount <= 16)
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+ max_hop_count = hcount;
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+ else
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+ usage ();
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} else if (!strcmp (argv [i], "-A")) {
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if (++i == argc)
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usage ();
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@@ -425,6 +435,17 @@
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packet -> giaddr = ip -> primary_address;
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if (packet -> hops != 255)
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packet -> hops = packet -> hops + 1;
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+
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+ /* ftp://ftp.rfc-editor.org/in-notes/rfc1542.txt
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+ * 4.1.1 BOOTREQUEST Messages
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+ * The relay agent MUST silently discard BOOTREQUEST messages whose
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+ * 'hops' field exceeds the value 16. A configuration option SHOULD be
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+ * provided to set this threshold to a smaller value if desired by the
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+ * network manager. The default setting for a configurable threshold
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+ * SHOULD be 4.
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+ */
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+ if (packet -> hops >= max_hop_count)
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+ return;
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/* Otherwise, it's a BOOTREQUEST, so forward it to all the
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servers. */
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@@ -470,7 +470,7 @@
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static void usage ()
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{
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log_fatal ("Usage: dhcrelay [-p <port>] [-d] [-D] [-i %s%s%s",
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- "interface]\n ",
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+ "interface] [-c max_hop_count]\n ",
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"[-q] [-a] [-A length] [-m append|replace|forward|discard]\n",
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" [server1 [... serverN]]");
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}
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