proto = Proto("NIFI", "Nintendo DS ni-fi")

MAGIC = ProtoField.uint32("nifi.magic", "Magic", base.HEX)
SENDERID = ProtoField.int32("nifi.senderid", "SenderID", base.DEC)
TYPE = ProtoField.uint32("nifi.type", "Type", base.DEC)
LENGTH = ProtoField.uint32("nifi.length", "Length", base.DEC)
TIMESTAMP = ProtoField.uint64("nifi.timestamp", "Timestamp", base.DEC)

proto.fields = {
	MAGIC,
	SENDERID,
	TYPE,
	LENGTH,
	TIMESTAMP,
}

function proto.dissector(buffer, pinfo, tree)
	-- check magic ("NIFI")
	if buffer(0, 4):uint() ~= 0x4e494649 then return end

	pinfo.cols.protocol = proto.name

	local subtree = tree:add(proto, buffer(), "Ni-Fi data")

	subtree:add(MAGIC, buffer(0, 4))
	subtree:add_le(SENDERID, buffer(4, 4))
	pinfo.cols.src = tostring(buffer(4, 4):le_int())
	subtree:add_le(TYPE, buffer(8, 4))
	subtree:add_le(LENGTH, buffer(12, 4))
	subtree:add_le(TIMESTAMP, buffer(16, 8))
end