mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-26 03:25:35 +00:00
27 lines
1.1 KiB
Lua
27 lines
1.1 KiB
Lua
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tsdebug_ll = Proto("tsdebug", "Tailscale debug")
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PATH = ProtoField.string("tsdebug.PATH","PATH", base.ASCII)
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tsdebug_ll.fields = {PATH}
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function tsdebug_ll.dissector(buffer, pinfo, tree)
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pinfo.cols.protocol = tsdebug_ll.name
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packet_length = buffer:len()
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local offset = 0
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local subtree = tree:add(tsdebug_ll, buffer(), "Tailscale packet")
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-- -- Get path UINT16
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local path_id = buffer:range(offset, 2):le_uint()
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if path_id == 0 then subtree:add(PATH, "FromLocal")
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elseif path_id == 1 then subtree:add(PATH, "FromPeer")
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elseif path_id == 2 then subtree:add(PATH, "Synthesized (Inbound / ToLocal)")
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elseif path_id == 3 then subtree:add(PATH, "Synthesized (Outbound / ToPeer)")
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end
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offset = offset + 2
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-- -- Handover rest of data to ip dissector
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local data_buffer = buffer:range(offset, packet_length-offset):tvb()
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Dissector.get("ip"):call(data_buffer, pinfo, tree)
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end
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-- Install the dissector on link-layer ID 147 (User-defined protocol 0)
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local eth_table = DissectorTable.get("wtap_encap")
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eth_table:add(wtap.USER0, tsdebug_ll)
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