#!/usr/bin/env python
# -*- coding: utf-8 -*-

import scapy.all as scapy
import scapy.contrib.modbus as mb

def decode(pkt):
    prt=0
    addr,value = "",""
    bigL = [ ]
    global miniL
    f=open("truc.txt","w")
    if "ModbusADU" in pkt:
        grPkt=pkt["ModbusADU"].show(dump=True)
        lPkt=grPkt.splitlines()
        for i in lPkt:
            if "###" in i:
                #if addr!="" and value!="":
                    #print("addr=",addr,"value=",value)
                prt=0
                typResp=""
            if "Coil" in i:
                prt=1
                miniL[0] = "c"
            elif "Register" in i:
                prt=2
                miniL[0] = "r"
            #if prt==1:
                #print(i)
            elif "startAddr" in i or "outputAddr" in i or "registerAddr" in i:
                miniL[1] = i[i.find("=")+2:]
                #print(addr)
            elif "coilStatus" in i or "registerVal=" in i or "outputsValue" in i:
                miniL[2] = i[i.find("[")+1:i.rfind("]")]
                #print("value= ",value," addr= ",addr)
            elif "outputValue" in i or "quantityOutput" in i or "registerValue" in i:
                miniL[2] = i[i.find("=")+2:]
    if miniL.count(0)==0:
        print(miniL)
        miniL = [0,0,0]
miniL = [0,0,0]
scapy.sniff(iface="lo", prn=decode)