This is our old Q&A Site. Please post any new questions and answers at

could you tell me how to dissect fp over udp? Gr.

asked 03 Jul '12, 01:11

smilezuzu's gravatar image

accept rate: 0%

You can't dissect FP over UDP and the higer layers without prior knowledge of the content/Configuration hence the FP dissector requires a "per-packet" structure to be filed in in order to do the dissection. The NBAP dissectore has code to set up a conversation and fill parts of the required information should NBAP signaling be present in the trace(Work in progress). There is provissions for a pseudo UDP FP format should your equipment be able to produce it. See the wireshark wiki and simmilar questions asked before. The FP-hint dissector also handles some pseudo format. It might be possible to constuct a heuristic FP dissector but it might requre "three-pass" dissection. 1) Use the header CRC to confirm FP packet. 1b)Use the command code to find the channel type. If it's not a DCH channel there might be enough information to dissect the rest of the packet.

permanent link

answered 03 Jul '12, 22:28

Anders's gravatar image

Anders ♦
accept rate: 17%

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 03 Jul '12, 01:11

question was seen: 3,247 times

last updated: 03 Jul '12, 22:28

p​o​w​e​r​e​d by O​S​Q​A