Railway Dissectors

Wireshark dissectors for protocols of a railway signalling network.

Currently available protocols

• RaSTA
• SCI-P
• SCI-LS

Installation

See https://www.wireshark.org/docs/wsug_html_chunked/ChPluginFolders.html

Linux

• Copy or symlink to ~/.local/lib/wireshark/plugins or $XDG_CONFIG_HOME/wireshark/plugins for Wireshark < 2.5

Safety Code Default Values

Due to limitation in Wireshark the initial values for MD4 and the key for Blake2b/SipHash2-4 can only be specified in decimal format in the protocol preferences.

For MD4 the default initial values in decimal are
MD4 A: 1732584193
MD4 B: 4023233417
MD4 C: 2562383102
MD4 D: 271733878

You can convert any other hex value to decimal using the following shell command

printf '%d\n' [Hex with leading 0x]

(should work on Bash, Zsh and most other shells)

Development

Useful links:

• https://wiki.wireshark.org/Lua
• https://www.wireshark.org/docs/wsdg_html_chunked/wsluarm.html
• https://wiki.wireshark.org/LuaAPI
• https://wiki.wireshark.org/Lua/Examples?action=AttachFile&do=get&target=dissector.lua
• https://www.wireshark.org/docs/wsdg_html_chunked/wsluarm_modules.html

Contact

This repository is maintained by Markus Heinrich ([email protected])