Hi I try to add Lua-dissector to extend the original HCI_EVT dissector however, when I call dissector::call(but, pkt, root), the original HCI_EVT dissector seems not work it only show the raw data in tree items could you give a hint how to fix this thanks
p_multi = Proto("multi","MultiProto"); orig_d = nil RSSI3 = ProtoField.uint8("multi.rssi", "RSSI", base.HEX) p_multi.fields = {RSSI3}
orig_d = Dissector.get("bthci_evt") data = Dissector.get("data") orig_table = DissectorTable.get("hci_h4.type") if nil == orig_d2 then print("get orig_d2") orig_d2 = orig_table.get_dissector(orig_table, 5) if nil == orig_d2 then orig_d2 = orig_table.get_dissector(orig_table, 4) orig_table.set(5, orig_d2) end -- save orig_d2 as pattern 5 for testing print("orig_d2" .. type(orig_d2) .. tostring(orig_d2)) end
function p_multi.dissector(buf,pkt,root) length = buf:len() length2 = buf(1, buf:len()-1):tvb():len() print("length is " .. length .. " " .. length2) subtree = root:add(p_multi, buf(), "Multi rssi") if nil ~= orig_d2 then orig_d2:call(buf, pkt, root, buf(0, buf:len()) ) --orig_d2:call(buf, pkt, root) else print("error ! no orig_d2") end info = tostring(pkt.cols.info) pkt.cols.info:set(info .. " (length ".. length .. ")") subtree:add(RSSI3, buf(1,1)) -- only for test --end end
if orig_d == nil then print("failed orig_d is nil") else local inspect = require 'inspect' print(inspect(getmetatable(orig_d))) if orig_table == nil then print("failed orig_table is nil") else print("register orig_table") orig_table:add(4, p_multi) end end
local tap = Listener.new("bluetooth.hci_summary") function tap.packet(pinfo,tvb,ip) -- print("tap length:".. tvb:len() .. " " .. type(ip)) end
