mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-29 13:05:46 +00:00
27 lines
1.1 KiB
Lua
27 lines
1.1 KiB
Lua
tsdebug_ll = Proto("tsdebug", "Tailscale debug")
|
|
PATH = ProtoField.string("tsdebug.PATH","PATH", base.ASCII)
|
|
tsdebug_ll.fields = {PATH}
|
|
|
|
function tsdebug_ll.dissector(buffer, pinfo, tree)
|
|
pinfo.cols.protocol = tsdebug_ll.name
|
|
packet_length = buffer:len()
|
|
local offset = 0
|
|
local subtree = tree:add(tsdebug_ll, buffer(), "Tailscale packet")
|
|
|
|
-- -- Get path UINT16
|
|
local path_id = buffer:range(offset, 2):le_uint()
|
|
if path_id == 0 then subtree:add(PATH, "FromLocal")
|
|
elseif path_id == 1 then subtree:add(PATH, "FromPeer")
|
|
elseif path_id == 2 then subtree:add(PATH, "Synthesized (Inbound / ToLocal)")
|
|
elseif path_id == 3 then subtree:add(PATH, "Synthesized (Outbound / ToPeer)")
|
|
end
|
|
offset = offset + 2
|
|
|
|
-- -- Handover rest of data to ip dissector
|
|
local data_buffer = buffer:range(offset, packet_length-offset):tvb()
|
|
Dissector.get("ip"):call(data_buffer, pinfo, tree)
|
|
end
|
|
|
|
-- Install the dissector on link-layer ID 147 (User-defined protocol 0)
|
|
local eth_table = DissectorTable.get("wtap_encap")
|
|
eth_table:add(wtap.USER0, tsdebug_ll) |