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wireshark-dissector.lua
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wireshark-dissector.lua
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-- dofile("wireshark-dissector.lua")
--
do
booth_proto = Proto("Booth","Booth")
function T32(tree, buffer, start, format)
local b = buffer(start, 4)
return tree:add(b, string.format(format, b:uint()))
end
function booth_proto.dissector(buffer, pinfo, tree)
local endbuf = buffer:len()
pinfo.cols.protocol = "Booth"
if (endbuf < 24) then
pinfo.cols.info = "Booth - too small"
else
local hdr = tree:add(booth_proto, buffer(0, 24), "Booth header")
local cmd = buffer(28, 4)
local tcmd = T32(hdr, cmd, 0, "Cmd %08x, \"" .. cmd:string() .. "\"");
local from = buffer(20, 4)
local tfrom = T32(hdr, from, 0, "From %08x");
if bit.band(from:uint(), 0x80000000) > 0 then
tfrom:add_expert_info(PI_PROTOCOL, PI_WARN, "Highest bit set")
end
local len = buffer(24, 4)
local tlen = T32(hdr, len, 0, "Length %8d");
if len:uint() > 1000 then
tlen:add_expert_info(PI_PROTOCOL, PI_WARN, "Length too big?")
end
T32(hdr, buffer, 32, "Result %08x");
T32(hdr, buffer, 12, "Magic %08x");
T32(hdr, buffer, 16, "Version %08x");
T32(hdr, buffer, 0, "IV %08x");
T32(hdr, buffer, 4, "Auth1 %08x");
T32(hdr, buffer, 8, "Auth2 %08x");
if (endbuf > 36) then
local tick = tree:add(booth_proto, buffer(36, endbuf-36), "Booth data")
local name = buffer(36, 64)
tick:add(name, "Ticket name: ", name:string())
T32(tick, buffer, 36+64 + 0, "Leader: %08x")
T32(tick, buffer, 36+64 + 4, "Term: %08x")
T32(tick, buffer, 36+64 + 8, "Term valid for: %08x")
T32(tick, buffer, 36+64 + 12, "Leader commit: %8d")
end
pinfo.cols.info = "Booth, cmd " .. cmd:string()
end
tree:add(booth_proto, buffer(0, endbuf), "data")
end
local tbl = DissectorTable.get("udp.port")
tbl:add(9929, booth_proto)
local tbl = DissectorTable.get("tcp.port")
tbl:add(9929, booth_proto)
end

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