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do
-- satp example
-- declare our protocol
local proto_satp = Proto("SATP","Secure Anycast Tunneling Protocol")
local payload_types = {
[0x0800] = "IPv4",
[0x6558] = "Ethernet",
[0x56DD] = "IPv6"
}
local payload_dissector = {
[0x0800] = "ip",
[0x6558] = "ethernet",
[0x56DD] = "ipv6"
}
local field_seq = ProtoField.uint32("satp.seq","Sequence Number",base.DEC)
local field_sid = ProtoField.uint16("satp.sid","Sender ID",base.DEC)
local field_mux = ProtoField.uint16("satp.mux","Mux",base.DEC)
local field_ptype = ProtoField.uint16("satp.ptype","Payload Type (plain?)",base.HEX,payload_types)
proto_satp.fields = { field_seq, field_sid, field_mux, field_ptype }
-- create a function to dissect it
function proto_satp.dissector(buffer,pinfo,tree)
local info_string = "Sender Id: " .. buffer(4,2):uint() .. ", Mux: " .. buffer(6,2):uint() .. ", SeqNr: " .. buffer(0,4):uint()
pinfo.cols.protocol = "SATP"
pinfo.cols.info = info_string
local subtree = tree:add(proto_satp,buffer(),"SATP, " .. info_string)
subtree:add(field_seq, buffer(0,4))
subtree:add(field_sid, buffer(4,2))
subtree:add(field_mux, buffer(6,2))
local payload_type = buffer(8,2):uint()
if payload_dissector[payload_type] ~= nil then
subtree:add(field_ptype, buffer(8,2))
Dissector.get(payload_dissector[payload_type]):call(buffer(10):tvb(),pinfo,tree)
else
Dissector.get("data"):call(buffer(8):tvb(),pinfo,tree)
end
end
-- load the udp.port table
udp_table = DissectorTable.get("udp.port")
-- register our protocol to handle udp port 4444
udp_table:add(4444,proto_satp)
end
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