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| author | Chris Maynard <Christopher.Maynard@GTECH.COM> | 2013-09-09 01:04:13 +0000 |
|---|---|---|
| committer | Chris Maynard <Christopher.Maynard@GTECH.COM> | 2013-09-09 01:04:13 +0000 |
| commit | eeba21136c3ed0f45e8a17b5daa422cd8c008c38 (patch) | |
| tree | 072b48fd33eea2411d525c2d672f2be25ebc3413 /doc | |
| parent | bffe25fdc22c076cca8bb5b48aac4e80d5fbd730 (diff) | |
OK, allow either positive or negative offsets no matter if we're chopping from the beginning or the end.
Given the following example, it's now possible to chop the 10 bytes depicted from the 100 byte packet 4 different ways and achieve the exact same results:
<-------- 100 --------> Methods:
1) editcap -C 20:10 in.pcap out.pcap
+------+----+---------+ 2) editcap -C -80:10 in.pcap out.pcap
| 20 | 10 | 70 | 3) editcap -C -70:-10 in.pcap out.pcap
+------+----+---------+ 4) editcap -C 30:-10 in.pcap out.pcap
svn path=/trunk/; revision=51854
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/editcap.pod | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/editcap.pod b/doc/editcap.pod index 00422e4bcd..fda1228558 100644 --- a/doc/editcap.pod +++ b/doc/editcap.pod @@ -96,8 +96,8 @@ chopped by <choplen> bytes of data. Positive values chop at the packet beginning while negative values chop at the packet end. If an optional offset precedes the <choplen>, then the bytes chopped will be -offset from that value. Offsets are expected to be positive values, regardless -of chopping from packet beginning or packet end. +offset from that value. Positve offsets are from the packet beginning, while +negative offsets are from the packet end. This is useful for chopping headers for decapsulation of an entire capture, removing tunneling headers, or in the rare case that the conversion between two |