Wireshark mailing list archives

Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector?

From: Guy Harris <guy () alum mit edu>
Date: Fri, 24 Jun 2011 12:37:06 -0700


On Jun 24, 2011, at 12:25 PM, John x wrote:

but how to get the location (called offset, right?) value? since I need to reach to the last byte of the packet


Offsets within the tvbuff containing your packet start at 0, so if your packet is N bytes long, the offset of the last 
byte of the packet is N-1.

Subtract 1 from the result of tvb_reported_length(); that's the offset to use.
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Current thread:

how to extract "IP.len" (IP_total length) to my local variable in my dissector? John x (Jun 24)
- Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? Jaap Keuter (Jun 24)
  - Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? John x (Jun 24)
    - Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? Guy Harris (Jun 24)
    - Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? John x (Jun 24)
    - Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? Guy Harris (Jun 24)
    - Re: how to extract "IP.len" (IP_total length) to my local variable in my dissector? John x (Jun 24)