From 0b7d1611d05688536992ae47962fda079c601207 Mon Sep 17 00:00:00 2001
From: Dario Lombardo <lomato@gmail.com>
Date: Tue, 11 Aug 2015 23:58:54 +0200
Subject: editcap: add change offset.

This option skips some bytes when fuzzing, that prevents some headers from being changed. This focuses fuzzer to a smaller part of the packet.

Change-Id: I1db83235e93f2774a9991e3af70f633487b816fa
Reviewed-on: https://code.wireshark.org/review/9982
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
---
 doc/editcap.pod | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'doc/editcap.pod')

diff --git a/doc/editcap.pod b/doc/editcap.pod
index d816926c20..96dd003ad1 100644
--- a/doc/editcap.pod
+++ b/doc/editcap.pod
@@ -15,6 +15,7 @@ S<[ B<-E> E<lt>error probabilityE<gt> ]>
 S<[ B<-F> E<lt>file formatE<gt> ]>
 S<[ B<-h> ]>
 S<[ B<-i> E<lt>seconds per fileE<gt> ]>
+S<[ B<-o> E<lt>change offsetE<gt> ]>
 S<[ B<-L> ]>
 S<[ B<-r> ]>
 S<[ B<-s> E<lt>snaplenE<gt> ]>
@@ -188,6 +189,13 @@ Adjust the original frame length accordingly when chopping and/or snapping
 (in addition to the captured length, which is always adjusted regardless of
 whether B<-L> is specified or not).  See also B<-C <choplen>> and B<-s <snaplen>>.
 
+=item -o  E<lt>change offsetE<gt>
+
+When used in conjuction with -E, skip some bytes from the beginning of the packet
+from being changed. In this way some headers don't get changed, and the fuzzer is
+more focused on a smaller part of the packet. Keeping a part of the packet fixed
+the same dissector is triggered, that make the fuzzing more precise.
+
 =item -r
 
 Reverse the packet selection.
-- 
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