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--- dissects cannelloni packages
--- https://github.com/mguentner/cannelloni
--- https://github.com/PhilippFux/cannelloni
---
--- canneloni frame
cannelloni_protocol = Proto("Cannelloni", "Can over UPD Cannelloni")
cannelloni_version = ProtoField.int8("canneloni.version", "version", base.DEC)
cannelloni_opcode = ProtoField.int8("canneloni.opcode", "opcode", base.DEC)
cannelloni_seq_no = ProtoField.int8("canneloni.seq_no", "seq_no", base.DEC)
cannelloni_count = ProtoField.int16("canneloni.count", "count", base.DEC)
cannelloni_protocol.fields = {cannelloni_version, cannelloni_opcode, cannelloni_seq_no, cannelloni_count}
--- Can Frame
can_frame = Proto("MyFrame", "My Can Frame")
can_frame_id = ProtoField.uint32("can.frame.arbitration_id", "can_id", base.HEX)
can_frame_is_extended = ProtoField.string("can.frame.is_extended", "is_extended")
can_frame_dlc = ProtoField.uint8("can.frame.dlc", "dlc", base.DEC)
can_frame_pdu = ProtoField.uint64("can.frame.pdu", "pdu", base.HEX)
can_frame.fields = {can_frame_id, can_frame_is_extended, can_frame_dlc, can_frame_pdu}
--- select your database - generated with canmatrix here [canconvert some.dbc can_database.lua]
require "can_database"
debug_example_protocol = false
cannelloni_header_offset = 5
function cannelloni_protocol.dissector(buffer, pinfo, tree)
length = buffer:len()
if length == 0 then return end
pinfo.cols.protocol = cannelloni_protocol.name
local subtree = tree:add(cannelloni_protocol, buffer(), "Cannelloni Protocol Data")
subtree:add(cannelloni_version, buffer(0,1))
subtree:add(cannelloni_opcode, buffer(1,1))
subtree:add(cannelloni_seq_no, buffer(2,1))
subtree:add(cannelloni_count, buffer(3,2))
local count = buffer(3,2):uint()
buffer_offset = cannelloni_header_offset
--- each frame:
for i=1,count do
local framesubtree = subtree:add(can_frame, buffer(), "Can Frame" .. tostring(i))
can_id = buffer(buffer_offset,4)
framesubtree:add(can_frame_id, can_id:bitfield(1,31))
if can_id:bitfield(0,1) == 1 then
framesubtree:add(can_frame_is_extended, "True")
else
framesubtree:add(can_frame_is_extended, "False")
end
framesubtree:add(can_frame_dlc, buffer(buffer_offset+4,1))
local dlc = buffer(buffer_offset+4,1):uint()
pdu = buffer(buffer_offset+5,dlc)
framesubtree:add(can_frame_pdu, pdu)
add_frame_info(can_id:uint(), pdu, dlc, framesubtree)
buffer_offset = buffer_offset + 4 + 1 + dlc
end
end
example_add_tree_info = true
local udp_port = DissectorTable.get("udp.port")
udp_port:add(3333, cannelloni_protocol)
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