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List:       nmap-dev
Subject:    [PATCH] --comment option
From:       Kris Katterjohn <katterjohn () gmail ! com>
Date:       2007-09-15 16:00:00
Message-ID: 46EC0180.20208 () gmail ! com
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Hey everyone!

I know Nmap is in a feature freeze, so I'm sending this patch so it's 
archived on seclists if/when it can be applied.  It's so small it 
shouldn't unstabilize Nmap, but when it's a feature freeze it's a 
feature freeze :)

This patch adds a --comment option, which allows you to send a comment 
(some text) along with the packets.  It's basically just like 
--data-length (the way I implemented it) but you choose what goes with 
the packets rather than just random data.

I saw this on the Nmap TODO, and thought it was an interesting idea. 
Here's a little example from the TODO:

--comment "Scan conducted by Marc Reis from SecOps, extension 2147"

Please let me know what you think!

Thanks,
Kris Katterjohn

["comment.patch" (text/x-patch)]

Index: nmap.cc
===================================================================
--- nmap.cc	(revision 5839)
+++ nmap.cc	(working copy)
@@ -581,6 +581,7 @@
       {"version-trace", no_argument, 0, 0}, /* Display -sV related activity */
       {"data_length", required_argument, 0, 0},
       {"data-length", required_argument, 0, 0},
+      {"comment", required_argument, 0, 0},
       {"send_eth", no_argument, 0, 0},
       {"send-eth", no_argument, 0, 0},
       {"send_ip", no_argument, 0, 0},
@@ -794,6 +795,8 @@
 	o.setVersionTrace(true);
 	o.debugging++;
       } else if (optcmp(long_options[option_index].name, "data-length") == 0) {
+	if (o.extra_payload_length)
+	  fatal("Can't use --data-length and --comment together, or multiple times");
 	o.extra_payload_length = atoi(optarg);
 	if (o.extra_payload_length < 0) {
 	  fatal("data-length must be greater than 0");
@@ -801,6 +804,11 @@
 	  o.extra_payload = (char *) safe_malloc(o.extra_payload_length);
 	  get_random_bytes(o.extra_payload, o.extra_payload_length);
 	}
+      } else if (optcmp(long_options[option_index].name, "comment") == 0) {
+	if (o.extra_payload_length)
+	  fatal("Can't use --data-length and --comment together, or multiple times");
+	o.extra_payload = strdup(optarg);
+	o.extra_payload_length = strlen(o.extra_payload);
       } else if (optcmp(long_options[option_index].name, "send-eth") == 0) {
 	o.sendpref = PACKET_SEND_ETH_STRONG;
       } else if (optcmp(long_options[option_index].name, "send-ip") == 0) {


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