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