252 lines
11 KiB
Python
252 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 binascii
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import hmac
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import hashlib
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# Data structure for holding IPSC information
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NETWORK = {
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'IPSC1': {
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'LOCAL': {
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'DESCRIPTION': 'K0USY Lecompton, KS - Master',
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'MODE': b'\x6A',
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'FLAGS': b'\x00\x00\x80\xDC',
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'PORT': 50001,
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'RADIO_ID': binascii.unhexlify('00000001'),
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'AUTH_KEY': binascii.unhexlify('0000000000000000000000000000000000012345')
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},
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'MASTER': {
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'IP': '24.143.49.121',
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'MODE': b'\x6A',
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'PORT': 50000,
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'RADIO_ID': '',
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},
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'PEERS': [ # each list entry will be a dictionary for IP, RADIO ID and PORT
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#{'IP': '100.200.1.1', 'PORT': 50000, 'RADIO_ID': b'\x00\x00\x00\xFF'},
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]
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},
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'IPSC2': {
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'LOCAL': {
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'DESCRIPTION': 'KS DMR Basehor, KS - Master',
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'MODE': b'\x6A',
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'FLAGS': b'\x00\x00\x80\xDC',
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'PORT': 50002,
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'RADIO_ID': binascii.unhexlify('00000002'),
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'AUTH_KEY': binascii.unhexlify('0000000000000000000000000000000000012345')
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},
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'MASTER': {
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'IP': '24.124.21.73',
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'MODE': b'\x6A',
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'PORT': 50000,
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'RADIO_ID': '',
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},
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'PEERS': [ # each list entry will be a dictionary for IP, RADIO ID and PORT
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#{'IP': '100.200.1.1', 'PORT': 50000, 'RADIO_ID': b'\x00\x00\x00\xFF'},
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]
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},
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'IPSC3': {
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'LOCAL': {
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'DESCRIPTION': 'K0USY c-Bridge Lawrence, KS - Master',
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'MODE': b'\x6A',
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'FLAGS': b'\x00\x00\x80\xDC',
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'PORT': 50003,
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'RADIO_ID': binascii.unhexlify('00000003'),
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'AUTH_KEY': binascii.unhexlify('0000000000000000000000000000000000012345')
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},
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'MASTER': {
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'IP': '164.113.197.12',
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'MODE': b'\x6A',
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'PORT': 50055,
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'RADIO_ID': '',
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},
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'PEERS': [ # each list entry will be a dictionary for IP, RADIO ID and PORT
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#{'IP': '100.200.1.1', 'PORT': 50000, 'RADIO_ID': b'\x00\x00\x00\xFF'},
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]
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},
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'IPSC4': {
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'LOCAL': {
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'DESCRIPTION': 'W0WJB Kansas City, MO - Master',
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'MODE': b'\x6A',
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'FLAGS': b'\x00\x00\x80\xDC',
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'PORT': 50004,
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'RADIO_ID': binascii.unhexlify('00000004'),
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'AUTH_KEY': binascii.unhexlify('0000000000000000000000000000000000005651')
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},
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'MASTER': {
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'IP': '166.250.7.136',
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'MODE': b'\x6A',
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'PORT': 50000,
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'RADIO_ID': '',
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},
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'PEERS': [ # each list entry will be a dictionary for IP, RADIO ID and PORT
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#{'IP': '100.200.1.1', 'PORT': 50000, 'RADIO_ID': b'\x00\x00\x00\xFF'},
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]
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}
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}
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# Known IPSC Message Types
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RDAC_CTL = b'\x70'
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GROUP_VOICE = b'\x80'
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GROUP_DATA = b'\x83'
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PVT_DATA = b'\x84'
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RPT_WAKE_UP = b'\x85'
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MASTER_REG_REQ = b'\x90' # FROM peer TO master
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MASTER_REG_REPLY = b'\x91' # FROM master TO peer
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PEER_LIST_REQ = b'\x92'
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PEER_LIST_REPLY = b'\x93'
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PEER_REG_REQUEST = b'\x94' # Peer registration request
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PEER_REG_REPLY = b'\x95' # Peer registration reply
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MASTER_ALIVE_REQ = b'\x96' # FROM peer TO master
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MASTER_ALIVE_REPLY = b'\x97' # FROM master TO peer
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PEER_ALIVE_REQ = b'\x98' # Peer keep alive request
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PEER_ALIVE_REPLY = b'\x99' # Peer keep alive reply
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# IPSC Version Information
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IPSC_OP_VER = b'\x04\x03' # 0x04, 0x03 -- seems to be current version of IPSC
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IPSC_OLD_VER = b'\x04\x00' # 0x04, 0x02 -- oldest version of IPSC suppoerted
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IPSC_VER = IPSC_OP_VER + IPSC_OLD_VER
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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 print_peer_list(_ipsc_network):
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print('\t', _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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print ('\t', address[0],address[1],address[2],address[3], sep='.', end='\t')
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print (port, radio_id, sep=':', end=' ')
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print ("IPSC Mode:", hex_mode)
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print()
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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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local = self._config['LOCAL']
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master = self._config['MASTER']
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self.TS_FLAGS = (local['MODE'] + local['FLAGS'])
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self.MASTER_REG_REQ_PKT = (MASTER_REG_REQ + local['RADIO_ID'] + self.TS_FLAGS + IPSC_VER)
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self.MASTER_ALIVE_PKT = (MASTER_ALIVE_REQ + local['RADIO_ID'] + self.TS_FLAGS + IPSC_VER)
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self.PEER_LIST_REQ_PKT = (PEER_LIST_REQ + local['RADIO_ID'])
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self.PEER_REG_REPLY_PKT = (PEER_REG_REPLY + local['RADIO_ID'] + IPSC_VER)
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self.PEER_ALIVE_REQ_PKT = (PEER_ALIVE_REQ + local['RADIO_ID'] + self.TS_FLAGS)
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self.PEER_ALIVE_REPLY_PKT = (PEER_ALIVE_REPLY + local['RADIO_ID'] + self.TS_FLAGS)
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else:
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print("Unexpected arguments found.")
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def masterKeepalive(self):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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master_alive_packet = hashed_packet(local['AUTH_KEY'], self.MASTER_ALIVE_PKT)
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self.transport.write(master_alive_packet, (master['IP'], master['PORT']))
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print("->> Master Keep Alive Sent To:\t", master['IP'],":", master['PORT'], "\n")
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def startProtocol(self):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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print ("*** config: %s" % self._config)
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print ()
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print ("*** Starting up IPSC Client and Registering to the Master ***")
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reg_packet = hashed_packet(local['AUTH_KEY'], self.MASTER_REG_REQ_PKT)
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self.transport.write(reg_packet, (master['IP'], master['PORT']))
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print ("->> Sending Registration to Master:\t", master['IP'],":", master['PORT'],
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"\tFrom:", binascii.b2a_hex(local['RADIO_ID']), "\n")
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#
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self._call = task.LoopingCall(self.masterKeepalive)
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self._loop = self._call.start(6)
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def datagramReceived(self, data, (host, port)):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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dest_ip = master['IP']
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dest_port = master['PORT']
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#print "received %r from %s:%d" % (binascii.b2a_hex(data), host, port)
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_packettype = (data[0:1])
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if (_packettype == MASTER_REG_REQ):
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print("<<- Registration Packet Recieved\n")
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elif (_packettype == MASTER_REG_REPLY):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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print("<<- Master Registration Reply From:\t", host,":",port)
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master_alive_packet = hashed_packet(local['AUTH_KEY'], self.MASTER_ALIVE_PKT)
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self.transport.write(master_alive_packet, (host, port))
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print("->> Master Keep Alive Sent To:\t", host,":",port, "\n")
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# the only time we need to ask for the peer list is after we've registered to the master
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peer_list_req_packet = hashed_packet(local['AUTH_KEY'], self.PEER_LIST_REQ_PKT)
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self.transport.write(peer_list_req_packet, (host, port))
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print("->> Peer List Reqested from Master:\t", host,":",port, "\n")
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#print binascii.b2a_hex(peer_list_req_packet)
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elif (_packettype == PEER_REG_REQUEST):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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print("<<- Peer Registration Request From:\t", host,":",port)
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peer_reg_reply_packet = hashed_packet(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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print("->> Peer Registration Reply Sent To:\t", host,":",port,"\n")
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#print host, port
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#print binascii.b2a_hex(peer_reg_reply_packet)
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elif (_packettype == PEER_ALIVE_REQ):
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local = self._config['LOCAL']
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master = self._config['MASTER']
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print("<<- Received Peer Keep Alive From:\t", host,":",port)
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peer_alive_req_packet = hashed_packet(local['AUTH_KEY'], self.PEER_ALIVE_REQ_PKT)
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peer_alive_reply_packet = hashed_packet(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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print("->> Sent Peer Keep Alive Reply To:\t\t", host,":",port,)
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self.transport.write(peer_alive_req_packet, (host, port))
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print("->> Sent Peer Keep Alive Request To:\t\t", host,":",port, "\n")
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#print binascii.b2a_hex(peer_alive_req_packet)
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elif (_packettype == MASTER_ALIVE_REPLY):
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print("<<- Keep Alive Recieved from Master:\t", host,":",port, "\n")
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elif (_packettype == PEER_ALIVE_REPLY):
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print("<<- Keep Alive Recieved from Peer:\t", host,":",port, "\n")
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elif (_packettype == RDAC_CTL):
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print("<<- RDAC and/or Control Packet From:\t", host,":",port, "\n")
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elif (_packettype == PEER_LIST_REPLY):
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print("<<- The Peer List has been Received from Master:\t", host,":",port)
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_num_peers = int(str(int(binascii.b2a_hex(data[5:7]), 16))[1:])
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print(' There are', _num_peers, 'peers in this IPSC Network')
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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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print()
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else:
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packet_type = binascii.b2a_hex(_packettype)
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print("<<- Recieved Unprocessed Type", packet_type, "From:\t", host,":",port,"\n")
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if __name__ == '__main__':
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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()
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