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Expand documentation and add packet type to the info column

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Dale Glass 2024-07-18 20:00:22 +02:00
parent c06a60eaea
commit 56ab058543
2 changed files with 26 additions and 0 deletions
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3
tools/dissectors/1-hfudt.lua
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@ -259,6 +259,7 @@ function p_hfudt.dissector(buf, pinfo, tree)
type:append_text(" (".. control_types[shifted_type][1] .. ")") type:append_text(" (".. control_types[shifted_type][1] .. ")")
subtree:add(f_control_type_text, control_types[shifted_type][1]) subtree:add(f_control_type_text, control_types[shifted_type][1])
pinfo.cols.info:append(" [" .. control_types[shifted_type][1] .. "]")
end end
if shifted_type == 0 then if shifted_type == 0 then
@ -337,10 +338,12 @@ function p_hfudt.dissector(buf, pinfo, tree)
local packet_type = buf(payload_offset, 1):le_uint() local packet_type = buf(payload_offset, 1):le_uint()
local ptype = subtree:add_le(f_type, buf(payload_offset, 1)) local ptype = subtree:add_le(f_type, buf(payload_offset, 1))
local packet_type_text = packet_types[packet_type] local packet_type_text = packet_types[packet_type]
if packet_type_text ~= nil then if packet_type_text ~= nil then
subtree:add(f_type_text, packet_type_text) subtree:add(f_type_text, packet_type_text)
-- if we know this packet type then add the name -- if we know this packet type then add the name
ptype:append_text(" (".. packet_type_text .. ")") ptype:append_text(" (".. packet_type_text .. ")")
pinfo.cols.info:append(" [" .. packet_type_text .. "]")
end end
-- read the version -- read the version

23
tools/dissectors/README.md
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@ -48,3 +48,26 @@ After a capture any detected Overte Packets should be easily identifiable by one
`[Expert Info (Error/Undecoded): Lua Error: /home/dale/.local/lib/wireshark/plugins/1-hfudt.lua:207: attempt to index global 'bit32' (a nil value)]` `[Expert Info (Error/Undecoded): Lua Error: /home/dale/.local/lib/wireshark/plugins/1-hfudt.lua:207: attempt to index global 'bit32' (a nil value)]`
See the installation requirements, you need to install the bit32 Lua module for the right Lua version. See the installation requirements, you need to install the bit32 Lua module for the right Lua version.
## Development hints
* Symlink files from the development tree to `$HOME/.local/lib/wireshark/plugins`, to have Wireshark work on the latest dissector code.
* Capture packets for later analysis in a PCAPNG file.
* Only save needed packets in the dump
Decode on the commandline with:
tshark -r packets.pcapng.gz -V
Decode only the first packet:
tshark -r packets.pcapng.gz -V -c 1
### Useful tshark arguments
* `-x` hex dump
* `-c N` Only decode first N packets
* `-O hfudt,hf-domain,hf-entity,hf-avatar,hf-audio` Only dump Overte protocol data, skip dumping UDP/etc parts.
* `-V` decode protocols
*