255 lines
11 KiB
Python
255 lines
11 KiB
Python
from __future__ import print_function
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from twisted.internet.protocol import DatagramProtocol
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from twisted.internet import reactor
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from twisted.internet import task
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import sys
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import argparse
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import binascii
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import hmac
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import hashlib
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#from logging.config import dictConfig
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#import logging
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#************************************************
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# IMPORTING OTHER FILES - '#include'
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#************************************************
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# Import system logger configuration
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try:
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from ipsc_logger import logger
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except ImportError:
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sys.exit('System logger configuraiton not found or invalid')
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# Import configuration and informational data structures
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try:
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from my_ipsc_config import NETWORK
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except ImportError:
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sys.exit('Configuration file not found, or not valid formatting')
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# Import IPSC message types and version information
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try:
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from ipsc_message_types import *
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except ImportError:
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sys.exit('IPSC message types file not found or invalid')
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# Import IPSC flag mask values
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try:
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from ipsc_mask import *
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except ImportError:
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sys.exit('IPSC mask values file not found or invalid')
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#************************************************
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# GLOBALLY SCOPED FUNCTIONS
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#************************************************
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def hashed_packet(_key, _data):
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hash = binascii.unhexlify((hmac.new(_key,_data,hashlib.sha1)).hexdigest()[:20])
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return (_data + hash)
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def validate_auth(_key, _data):
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return
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def print_mode_decode(_mode):
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_mode = int(_mode, 16)
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link_op = _mode & PEER_OP_MSK
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link_mode = _mode & PEER_MODE_MSK
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ts1 = _mode & IPSC_TS1_MSK
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ts2 = _mode & IPSC_TS2_MSK
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if link_op == 0b01000000:
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logger.info('\t\tPeer Operational')
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elif link_op == 0b00000000:
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logger.info('\t\tPeer Not Operational')
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else:
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logger.warning('\t\tPeer Mode Invalid')
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if link_mode == 0b00000000:
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logger.info('\t\tNo RF Interface')
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elif link_mode == 0b00010000:
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logger.info('\t\tRadio in Analog Mode')
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elif link_mode == 0b00100000:
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logger.info('\t\tRadio in Digital Mode')
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else:
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logger.warning('\t\tRadio Mode Invalid')
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if ts1 == 0b00001000:
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logger.info('\t\tIPSC Enabled on TS1')
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if ts2 == 0b00000010:
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logger.info('\t\tIPSC Enabled on TS2')
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def print_peer_list(_ipsc_network):
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logger.info('\t%s', _ipsc_network['LOCAL']['DESCRIPTION'])
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for dictionary in _ipsc_network['PEERS']:
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hex_address = dictionary['IP']
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hex_port = dictionary['PORT']
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hex_radio_id = dictionary['RADIO_ID']
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hex_mode = dictionary['MODE']
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address = [int(hex_address[0:2], 16), int(hex_address[2:4], 16), int(hex_address[4:6], 16), int(hex_address[6:8], 16)]
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port = int(hex_port, 16)
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radio_id = int(hex_radio_id, 16)
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logger.info('\tIP Address: %s.%s.%s.%s:%s', address[0], address[1], address[2], address[3], port)
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logger.info('\tRADIO ID: %s ', radio_id)
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logger.info("\tIPSC Mode:")
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print_mode_decode(hex_mode)
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logger.info("")
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#************************************************
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# IPSC Network Engine
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#************************************************
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class IPSC(DatagramProtocol):
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def __init__(self, *args, **kwargs):
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if len(args) == 1:
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self._config = args[0]
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args = ()
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self.TS_FLAGS = (self._config['LOCAL']['MODE'] + self._config['LOCAL']['FLAGS'])
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self.MASTER_REG_REQ_PKT = (MASTER_REG_REQ + self._config['LOCAL']['RADIO_ID'] + self.TS_FLAGS + IPSC_VER)
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self.MASTER_ALIVE_PKT = (MASTER_ALIVE_REQ + self._config['LOCAL']['RADIO_ID'] + self.TS_FLAGS + IPSC_VER)
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self.PEER_LIST_REQ_PKT = (PEER_LIST_REQ + self._config['LOCAL']['RADIO_ID'])
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self.PEER_REG_REPLY_PKT = (PEER_REG_REPLY + self._config['LOCAL']['RADIO_ID'] + IPSC_VER)
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self.PEER_ALIVE_REQ_PKT = (PEER_ALIVE_REQ + self._config['LOCAL']['RADIO_ID'] + self.TS_FLAGS)
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self.PEER_ALIVE_REPLY_PKT = (PEER_ALIVE_REPLY + self._config['LOCAL']['RADIO_ID'] + self.TS_FLAGS)
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else:
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logger.error("Unexpected arguments found.")
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def keepAlive(self):
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_master_connected = self._config['MASTER']['STATUS']['CONNECTED']
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# logger.debug("keepAlive Routine Running in Condition %s", _master_connected)
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if (_master_connected == 0):
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reg_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.MASTER_REG_REQ_PKT)
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self.transport.write(reg_packet, (self._config['MASTER']['IP'], self._config['MASTER']['PORT']))
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logger.info("->> Master Registration Request To:%s:%s From:%s", self._config['MASTER']['IP'], self._config['MASTER']['PORT'], binascii.b2a_hex(self._config['LOCAL']['RADIO_ID']))
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elif (_master_connected in (1,2)):
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if (_master_connected == 1):
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peer_list_req_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.PEER_LIST_REQ_PKT)
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self.transport.write(peer_list_req_packet, (self._config['MASTER']['IP'], self._config['MASTER']['PORT']))
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logger.info("->> List Reqested from Master:%s:%s", self._config['MASTER']['IP'], self._config['MASTER']['PORT'])
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master_alive_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.MASTER_ALIVE_PKT)
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self.transport.write(master_alive_packet, (self._config['MASTER']['IP'], self._config['MASTER']['PORT']))
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logger.info("->> Master Keep-alive Sent To:%s:%s", self._config['MASTER']['IP'], self._config['MASTER']['PORT'])
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elif (_master_connected == 2):
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master_alive_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.MASTER_ALIVE_PKT)
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self.transport.write(master_alive_packet, (self._config['MASTER']['IP'], self._config['MASTER']['PORT']))
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logger.info("->> Master Keep-alive Sent To:%s:%s", self._config['MASTER']['IP'], self._config['MASTER']['PORT'])
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else:
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logger.error("->> Master in UNKOWN STATE:%s:%s", self._config['MASTER']['IP'], self._config['MASTER']['PORT'])
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# logger.debug("keepAlive Routine ending at Condition %s", _master_connected)
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def startProtocol(self):
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#logger.debug("*** config: %s", self._config)
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#logger.info("")
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self._call = task.LoopingCall(self.keepAlive)
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self._loop = self._call.start(self._config['LOCAL']['ALIVE_TIMER'])
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def datagramReceived(self, data, (host, port)):
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dest_ip = self._config['MASTER']['IP']
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dest_port = self._config['MASTER']['PORT']
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#logger.info("received %r from %s:%d", binascii.b2a_hex(data), host, port)
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_packettype = (data[0:1])
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_peerid = (data[1:5])
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if (_packettype == PEER_ALIVE_REQ):
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logger.info("<<- Peer Keep-alive Request From Peer ID %s at:%s:%s", int(binascii.b2a_hex(_peerid), 16), host, port)
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peer_alive_req_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.PEER_ALIVE_REQ_PKT)
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peer_alive_reply_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.PEER_ALIVE_REPLY_PKT)
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self.transport.write(peer_alive_reply_packet, (host, port))
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logger.info("->> Peer Keep-alive Reply sent To:%s:%s", host, port)
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self.transport.write(peer_alive_req_packet, (host, port))
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logger.info("->> Peer Keep-alive Request sent To:%s:%s", host, port)
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#logger.info(binascii.b2a_hex(peer_alive_req_packet))
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elif (_packettype == MASTER_ALIVE_REPLY):
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logger.info("<<- Master Keep-alive Reply From:%s:%s", host, port)
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elif (_packettype == PEER_ALIVE_REPLY):
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logger.info("<<- Peer Keep-alive Reply From:%s:%s", host, port)
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elif (_packettype == MASTER_REG_REQ):
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logger.info("<<- Registration Packet Recieved")
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elif (_packettype == MASTER_REG_REPLY):
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self._config['MASTER']['STATUS']['CONNECTED'] = 1
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logger.info("<<- Master Registration Reply From:%s:%s Setting Condition %s", host, port,self._config['MASTER']['STATUS']['CONNECTED'])
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elif (_packettype == PEER_REG_REQUEST):
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logger.info("<<- Peer Registration Request From Peer ID %s at:%s:%s", int(binascii.b2a_hex(_peerid), 16), host, port)
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peer_reg_reply_packet = hashed_packet(self._config['LOCAL']['AUTH_KEY'], self.PEER_REG_REPLY_PKT)
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self.transport.write(peer_reg_reply_packet, (host, port))
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logger.info("->> Peer Registration Reply Sent To:%s:%s", host, port)
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#logger.info("%s:%s", host, port)
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#logger.info(binascii.b2a_hex(peer_reg_reply_packet))
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elif (_packettype == XCMP_XNL):
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logger.warning("<<- XCMP_XNL Packet From:%s:%s - We did not indicate XCMP capable!", host, port)
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elif (_packettype == PEER_LIST_REPLY):
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logger.info("<<- The Peer List has been Received from Master:%s:%s Setting Condition 2", host, port)
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self._config['MASTER']['STATUS']['CONNECTED'] = 2
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_num_peers = int(str(int(binascii.b2a_hex(data[5:7]), 16))[1:])
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logger.info(' There are %s peers in this IPSC Network', _num_peers)
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del self._config['PEERS'][:]
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for i in range(7, (_num_peers*11)+7, 11):
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self._config['PEERS'].append({
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'RADIO_ID': binascii.b2a_hex(data[i:i+4]),
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'IP': binascii.b2a_hex(data[i+4:i+8]),
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'PORT': binascii.b2a_hex(data[i+8:i+10]),
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'MODE': binascii.b2a_hex(data[i+10:i+11])
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})
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print_peer_list(self._config)
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logger.info("")
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elif (_packettype == GROUP_VOICE):
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logger.info("<<- Group Voice Packet From:%s:%s", host, port)
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elif (_packettype == PVT_VOICE):
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logger.info("<<- Voice Packet From:%s:%s", host, port)
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elif (_packettype == GROUP_DATA):
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logger.info("<<- Group Data Packet From:%s:%s", host, port)
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elif (_packettype == PVT_DATA):
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logger.info("<<- Private Data Packet From From:%s:%s", host, port)
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elif (_packettype == RPT_WAKE_UP):
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logger.info("<<- Repeater Wake-Up Packet From:%s:%s", host, port)
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elif (_packettype == DE_REG_REQ):
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logger.info("<<- Peer De-Registration Request From:%s:%s", host, port)
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elif (_packettype == DE_REG_REPLY):
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logger.info("<<- Peer De-Registration Reply From:%s:%s", host, port)
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elif (_packettype in (CALL_CTL_1, CALL_CTL_2, CALL_CTL_3)):
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logger.info("<<- Call Control Packet From:%s:%s", host, port)
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else:
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packet_type = binascii.b2a_hex(_packettype)
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logger.error("<<- Received Unprocessed Type %s From:%s:%s", packet_type, host, port)
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#************************************************
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# MAIN PROGRAM LOOP STARTS HERE
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#************************************************
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if __name__ == '__main__':
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logger.info('SYSTEM STARTING UP')
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for ipsc_network in NETWORK:
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reactor.listenUDP(NETWORK[ipsc_network]['LOCAL']['PORT'], IPSC(NETWORK[ipsc_network]))
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reactor.run() |