1105 lines
51 KiB
Python
Executable File
1105 lines
51 KiB
Python
Executable File
#!/usr/bin/env python
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#
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###############################################################################
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# Copyright (C) 2016 Cortney T. Buffington, N0MJS <n0mjs@me.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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###############################################################################
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#NOTE: This program uses a configuration file specified on the command line
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# if none is specified, then dmrlink.cfg in the same directory as this
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# file will be tried. Finally, if that does not exist, this process
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# will terminate
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from __future__ import print_function
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# Full imports
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import logging
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import cPickle as pickle
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# Function Imports
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from hmac import new as hmac_new
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from binascii import b2a_hex as ahex
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from binascii import a2b_hex as bhex
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from hashlib import sha1
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from socket import inet_ntoa as IPAddr
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from socket import inet_aton as IPHexStr
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from time import time
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# Twisted Imports
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from twisted.internet.protocol import DatagramProtocol, Factory, Protocol
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from twisted.protocols.basic import NetstringReceiver
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from twisted.internet import reactor, task
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# Imports files in the dmrlink subdirectory (these things shouldn't change often)
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from ipsc.ipsc_const import *
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from ipsc.ipsc_mask import *
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from ipsc.reporting_const import *
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# Imports from DMR Utilities package
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from dmr_utils.utils import hex_str_2, hex_str_3, hex_str_4, int_id, try_download, mk_id_dict
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2013 - 2016 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = 'Adam Fast, KC0YLK; Dave Kierzkowski, KD8EYF; Steve Zingman, N4IRS; Mike Zingman, N4IRR'
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__license__ = 'GNU GPLv3'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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# Global variables used whether we are a module or __main__
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systems = {}
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# Timed loop used for reporting IPSC status
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#
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# REPORT BASED ON THE TYPE SELECTED IN THE MAIN CONFIG FILE
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def config_reports(_config, _logger, _factory):
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if _config['REPORTS']['REPORT_NETWORKS'] == 'PRINT':
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def reporting_loop(_logger):
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_logger.debug('Periodic Reporting Loop Started (PRINT)')
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for system in _config['SYSTEMS']:
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print_master(_config, system)
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print_peer_list(_config, system)
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reporting = task.LoopingCall(reporting_loop, _logger)
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reporting.start(_config['REPORTS']['REPORT_INTERVAL'])
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report_server = False
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elif _config['REPORTS']['REPORT_NETWORKS'] == 'NETWORK':
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def reporting_loop(_logger, _server):
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_logger.debug('Periodic Reporting Loop Started (NETWORK)')
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_server.send_config()
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_logger.info('DMRlink TCP reporting server starting')
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report_server = _factory(_config, _logger)
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report_server.clients = []
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reactor.listenTCP(_config['REPORTS']['REPORT_PORT'], report_server)
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reporting = task.LoopingCall(reporting_loop, _logger, report_server)
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reporting.start(_config['REPORTS']['REPORT_INTERVAL'])
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else:
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def reporting_loop(_logger):
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_logger.debug('Periodic Reporting Loop Started (NULL)')
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report_server = False
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return report_server
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# ID ALIAS CREATION
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# Download
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def build_aliases(_config, _logger):
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if _config['ALIASES']['TRY_DOWNLOAD'] == True:
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# Try updating peer aliases file
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result = try_download(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'], _config['ALIASES']['PEER_URL'], _config['ALIASES']['STALE_TIME'])
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_logger.info(result)
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# Try updating subscriber aliases file
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result = try_download(_config['ALIASES']['PATH'], _config['ALIASES']['SUBSCRIBER_FILE'], _config['ALIASES']['SUBSCRIBER_URL'], _config['ALIASES']['STALE_TIME'])
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_logger.info(result)
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# Make Dictionaries
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peer_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'])
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if peer_ids:
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_logger.info('ID ALIAS MAPPER: peer_ids dictionary is available')
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subscriber_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['SUBSCRIBER_FILE'])
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if subscriber_ids:
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_logger.info('ID ALIAS MAPPER: subscriber_ids dictionary is available')
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talkgroup_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['TGID_FILE'])
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if talkgroup_ids:
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_logger.info('ID ALIAS MAPPER: talkgroup_ids dictionary is available')
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local_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['LOCAL_FILE'])
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if local_ids:
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_logger.info('ID ALIAS MAPPER: local_ids dictionary is available')
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return(peer_ids, subscriber_ids, talkgroup_ids, local_ids)
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# Make the IPSC systems from the config and the class used to build them.
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#
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def mk_ipsc_systems(_config, _logger, _systems, _ipsc, _report_server):
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for system in _config['SYSTEMS']:
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if _config['SYSTEMS'][system]['LOCAL']['ENABLED']:
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_systems[system] = _ipsc(system, _config, _logger, _report_server)
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reactor.listenUDP(_config['SYSTEMS'][system]['LOCAL']['PORT'], _systems[system], interface=_config['SYSTEMS'][system]['LOCAL']['IP'])
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return _systems
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# Process the MODE byte in registration/peer list packets for determining master and peer capabilities
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#
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def process_mode_byte(_hex_mode):
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_mode = int(ahex(_hex_mode), 16)
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# Determine whether or not the peer is operational
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_peer_op = bool(_mode & PEER_OP_MSK)
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# Determine whether or not timeslot 1 is linked
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_ts1 = bool(_mode & IPSC_TS1_MSK)
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# Determine whether or not timeslot 2 is linked
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_ts2 = bool(_mode & IPSC_TS2_MSK)
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# Determine the operational mode of the peer
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if _mode & PEER_MODE_MSK == PEER_MODE_MSK:
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_peer_mode = 'UNKNOWN'
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elif not _mode & PEER_MODE_MSK:
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_peer_mode = 'NO_RADIO'
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elif _mode & PEER_MODE_ANALOG:
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_peer_mode = 'ANALOG'
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elif _mode & PEER_MODE_DIGITAL:
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_peer_mode = 'DIGITAL'
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return {
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'PEER_OP': _peer_op,
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'PEER_MODE': _peer_mode,
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'TS_1': _ts1,
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'TS_2': _ts2
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}
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# Process the FLAGS bytes in registration replies for determining what services are available
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#
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def process_flags_bytes(_hex_flags):
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_byte3 = int(ahex(_hex_flags[2]), 16)
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_byte4 = int(ahex(_hex_flags[3]), 16)
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_csbk = bool(_byte3 & CSBK_MSK)
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_rpt_mon = bool(_byte3 & RPT_MON_MSK)
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_con_app = bool(_byte3 & CON_APP_MSK)
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_xnl_con = bool(_byte4 & XNL_STAT_MSK)
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_xnl_master = bool(_byte4 & XNL_MSTR_MSK)
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_xnl_slave = bool(_byte4 & XNL_SLAVE_MSK)
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_auth = bool(_byte4 & PKT_AUTH_MSK)
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_data = bool(_byte4 & DATA_CALL_MSK)
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_voice = bool(_byte4 & VOICE_CALL_MSK)
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_master = bool(_byte4 & MSTR_PEER_MSK)
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return {
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'CSBK': _csbk,
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'RCM': _rpt_mon,
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'CON_APP': _con_app,
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'XNL_CON': _xnl_con,
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'XNL_MASTER': _xnl_master,
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'XNL_SLAVE': _xnl_slave,
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'AUTH': _auth,
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'DATA': _data,
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'VOICE': _voice,
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'MASTER': _master
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}
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# Build a peer list - used when a peer registers, re-regiseters or times out
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#
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def build_peer_list(_peers):
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concatenated_peers = ''
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for peer in _peers:
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hex_ip = IPHexStr(_peers[peer]['IP'])
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hex_port = hex_str_2(_peers[peer]['PORT'])
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mode = _peers[peer]['MODE']
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concatenated_peers += peer + hex_ip + hex_port + mode
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peer_list = hex_str_2(len(concatenated_peers)) + concatenated_peers
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return peer_list
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# Gratuitous print-out of the peer list.. Pretty much debug stuff.
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#
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def print_peer_list(_config, _network):
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_peers = _config['SYSTEMS'][_network]['PEERS']
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_status = _config['SYSTEMS'][_network]['MASTER']['STATUS']['PEER_LIST']
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#print('Peer List Status for {}: {}' .format(_network, _status))
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if _status and not _config['SYSTEMS'][_network]['PEERS']:
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print('We are the only peer for: %s' % _network)
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print('')
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return
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print('Peer List for: %s' % _network)
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for peer in _peers.keys():
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_this_peer = _peers[peer]
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_this_peer_stat = _this_peer['STATUS']
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if peer == _config['SYSTEMS'][_network]['LOCAL']['RADIO_ID']:
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me = '(self)'
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else:
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me = ''
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print('\tRADIO ID: {} {}' .format(int_id(peer), me))
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print('\t\tIP Address: {}:{}' .format(_this_peer['IP'], _this_peer['PORT']))
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if _this_peer['MODE_DECODE'] and _config['REPORTS']['PRINT_PEERS_INC_MODE']:
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print('\t\tMode Values:')
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for name, value in _this_peer['MODE_DECODE'].items():
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print('\t\t\t{}: {}' .format(name, value))
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if _this_peer['FLAGS_DECODE'] and _config['REPORTS']['PRINT_PEERS_INC_FLAGS']:
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print('\t\tService Flags:')
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for name, value in _this_peer['FLAGS_DECODE'].items():
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print('\t\t\t{}: {}' .format(name, value))
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print('\t\tStatus: {}, KeepAlives Sent: {}, KeepAlives Outstanding: {}, KeepAlives Missed: {}' .format(_this_peer_stat['CONNECTED'], _this_peer_stat['KEEP_ALIVES_SENT'], _this_peer_stat['KEEP_ALIVES_OUTSTANDING'], _this_peer_stat['KEEP_ALIVES_MISSED']))
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print('\t\t KeepAlives Received: {}, Last KeepAlive Received at: {}' .format(_this_peer_stat['KEEP_ALIVES_RECEIVED'], _this_peer_stat['KEEP_ALIVE_RX_TIME']))
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print('')
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# Gratuitous print-out of Master info.. Pretty much debug stuff.
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#
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def print_master(_config, _network):
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if _config['SYSTEMS'][_network]['LOCAL']['MASTER_PEER']:
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print('DMRlink is the Master for %s' % _network)
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else:
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_master = _config['SYSTEMS'][_network]['MASTER']
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print('Master for %s' % _network)
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print('\tRADIO ID: {}' .format(int(ahex(_master['RADIO_ID']), 16)))
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if _master['MODE_DECODE'] and _config['REPORTS']['PRINT_PEERS_INC_MODE']:
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print('\t\tMode Values:')
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for name, value in _master['MODE_DECODE'].items():
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print('\t\t\t{}: {}' .format(name, value))
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if _master['FLAGS_DECODE'] and _config['REPORTS']['PRINT_PEERS_INC_FLAGS']:
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print('\t\tService Flags:')
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for name, value in _master['FLAGS_DECODE'].items():
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print('\t\t\t{}: {}' .format(name, value))
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print('\t\tStatus: {}, KeepAlives Sent: {}, KeepAlives Outstanding: {}, KeepAlives Missed: {}' .format(_master['STATUS']['CONNECTED'], _master['STATUS']['KEEP_ALIVES_SENT'], _master['STATUS']['KEEP_ALIVES_OUTSTANDING'], _master['STATUS']['KEEP_ALIVES_MISSED']))
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print('\t\t KeepAlives Received: {}, Last KeepAlive Received at: {}' .format(_master['STATUS']['KEEP_ALIVES_RECEIVED'], _master['STATUS']['KEEP_ALIVE_RX_TIME']))
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#************************************************
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# IPSC CLASS
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#************************************************
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class IPSC(DatagramProtocol):
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def __init__(self, _name, _config, _logger, _report):
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# Housekeeping: create references to the configuration and status data for this IPSC instance.
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# Some configuration objects that are used frequently and have lengthy names are shortened
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# such as (self._master_sock) expands to (self._config['MASTER']['IP'], self._config['MASTER']['PORT']).
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# Note that many of them reference each other... this is the Pythonic way.
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#
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self._system = _name
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self._CONFIG = _config
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self._logger = _logger
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self._report = _report
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self._config = self._CONFIG['SYSTEMS'][self._system]
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self._rcm = self._CONFIG['REPORTS']['REPORT_RCM'] and self._report
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#
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self._local = self._config['LOCAL']
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self._local_id = self._local['RADIO_ID']
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#
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self._master = self._config['MASTER']
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self._master_stat = self._master['STATUS']
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self._master_sock = self._master['IP'], self._master['PORT']
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#
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self._peers = self._config['PEERS']
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#
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# This is a regular list to store peers for the IPSC. At times, parsing a simple list is much less
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# Spendy than iterating a list of dictionaries... Maybe I'll find a better way in the future. Also
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# We have to know when we have a new peer list, so a variable to indicate we do (or don't)
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#
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args = ()
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# Packet 'constructors' - builds the necessary control packets for this IPSC instance.
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# This isn't really necessary for anything other than readability (reduction of code golf)
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#
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# General Items
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self.TS_FLAGS = (self._local['MODE'] + self._local['FLAGS'])
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#
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# Peer Link Maintenance Packets
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self.MASTER_REG_REQ_PKT = (MASTER_REG_REQ + self._local_id + self.TS_FLAGS + IPSC_VER)
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self.MASTER_ALIVE_PKT = (MASTER_ALIVE_REQ + self._local_id + self.TS_FLAGS + IPSC_VER)
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self.PEER_LIST_REQ_PKT = (PEER_LIST_REQ + self._local_id)
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self.PEER_REG_REQ_PKT = (PEER_REG_REQ + self._local_id + IPSC_VER)
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self.PEER_REG_REPLY_PKT = (PEER_REG_REPLY + self._local_id + IPSC_VER)
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self.PEER_ALIVE_REQ_PKT = (PEER_ALIVE_REQ + self._local_id + self.TS_FLAGS)
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self.PEER_ALIVE_REPLY_PKT = (PEER_ALIVE_REPLY + self._local_id + self.TS_FLAGS)
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#
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# Master Link Maintenance Packets
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# self.MASTER_REG_REPLY_PKT is not static and must be generated when it is sent
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self.MASTER_ALIVE_REPLY_PKT = (MASTER_ALIVE_REPLY + self._local_id + self.TS_FLAGS + IPSC_VER)
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self.PEER_LIST_REPLY_PKT = (PEER_LIST_REPLY + self._local_id)
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#
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# General Link Maintenance Packets
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self.DE_REG_REQ_PKT = (DE_REG_REQ + self._local_id)
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self.DE_REG_REPLY_PKT = (DE_REG_REPLY + self._local_id)
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#
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self._logger.info('(%s) IPSC Instance Created: %s, %s:%s', self._system, int_id(self._local['RADIO_ID']), self._local['IP'], self._local['PORT'])
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#******************************************************
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# SUPPORT FUNCTIONS FOR HANDLING IPSC OPERATIONS
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#******************************************************
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# Determine if the provided peer ID is valid for the provided network
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#
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def valid_peer(self, _peerid):
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if _peerid in self._peers:
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return True
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return False
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# Determine if the provided master ID is valid for the provided network
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#
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def valid_master(self, _peerid):
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if self._master['RADIO_ID'] == _peerid:
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return True
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else:
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return False
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# De-register a peer from an IPSC by removing it's information
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#
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def de_register_peer(self, _peerid):
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# Iterate for the peer in our data
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if _peerid in self._peers.keys():
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del self._peers[_peerid]
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self._logger.info('(%s) Peer De-Registration Requested for: %s', self._system, int_id(_peerid))
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return
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else:
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self._logger.warning('(%s) Peer De-Registration Requested for: %s, but we don\'t have a listing for this peer', self._system, int_id(_peerid))
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pass
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# De-register ourselves from the IPSC
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def de_register_self(self):
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self._logger.info('(%s) De-Registering self from the IPSC system', self._system)
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de_reg_req_pkt = self.hashed_packet(self._local['AUTH_KEY'], self.DE_REG_REQ_PKT)
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self.send_to_ipsc(de_reg_req_pkt)
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# Take a received peer list and the network it belongs to, process and populate the
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# data structure in my_ipsc_config with the results, and return a simple list of peers.
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#
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def process_peer_list(self, _data):
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# Create a temporary peer list to track who we should have in our list -- used to find old peers we should remove.
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_temp_peers = []
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# Determine the length of the peer list for the parsing iterator
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_peer_list_length = int(ahex(_data[5:7]), 16)
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# Record the number of peers in the data structure... we'll use it later (11 bytes per peer entry)
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self._local['NUM_PEERS'] = _peer_list_length/11
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self._logger.info('(%s) Peer List Received from Master: %s peers in this IPSC', self._system, self._local['NUM_PEERS'])
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# Iterate each peer entry in the peer list. Skip the header, then pull the next peer, the next, etc.
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for i in range(7, _peer_list_length +7, 11):
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# Extract various elements from each entry...
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_hex_radio_id = (_data[i:i+4])
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_hex_address = (_data[i+4:i+8])
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_ip_address = IPAddr(_hex_address)
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_hex_port = (_data[i+8:i+10])
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_port = int(ahex(_hex_port), 16)
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_hex_mode = (_data[i+10:i+11])
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# Add this peer to a temporary PeerID list - used to remove any old peers no longer with us
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_temp_peers.append(_hex_radio_id)
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# This is done elsewhere for the master too, so we use a separate function
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_decoded_mode = process_mode_byte(_hex_mode)
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# If this entry WAS already in our list, update everything except the stats
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# in case this was a re-registration with a different mode, flags, etc.
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if _hex_radio_id in self._peers.keys():
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self._peers[_hex_radio_id]['IP'] = _ip_address
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self._peers[_hex_radio_id]['PORT'] = _port
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self._peers[_hex_radio_id]['MODE'] = _hex_mode
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self._peers[_hex_radio_id]['MODE_DECODE'] = _decoded_mode
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self._peers[_hex_radio_id]['FLAGS'] = ''
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self._peers[_hex_radio_id]['FLAGS_DECODE'] = ''
|
|
self._logger.debug('(%s) Peer Updated: %s', self._system, self._peers[_hex_radio_id])
|
|
|
|
# If this entry was NOT already in our list, add it.
|
|
if _hex_radio_id not in self._peers.keys():
|
|
self._peers[_hex_radio_id] = {
|
|
'IP': _ip_address,
|
|
'PORT': _port,
|
|
'MODE': _hex_mode,
|
|
'MODE_DECODE': _decoded_mode,
|
|
'FLAGS': '',
|
|
'FLAGS_DECODE': '',
|
|
'STATUS': {
|
|
'CONNECTED': False,
|
|
'KEEP_ALIVES_SENT': 0,
|
|
'KEEP_ALIVES_MISSED': 0,
|
|
'KEEP_ALIVES_OUTSTANDING': 0,
|
|
'KEEP_ALIVES_RECEIVED': 0,
|
|
'KEEP_ALIVE_RX_TIME': 0
|
|
}
|
|
}
|
|
self._logger.debug('(%s) Peer Added: %s', self._system, self._peers[_hex_radio_id])
|
|
|
|
# Finally, check to see if there's a peer already in our list that was not in this peer list
|
|
# and if so, delete it.
|
|
for peer in self._peers.keys():
|
|
if peer not in _temp_peers:
|
|
self.de_register_peer(peer)
|
|
self._logger.warning('(%s) Peer Deleted (not in new peer list): %s', self._system, int_id(peer))
|
|
|
|
|
|
#************************************************
|
|
# CALLBACK FUNCTIONS FOR USER PACKET TYPES
|
|
#************************************************
|
|
|
|
# If RCM reporting and reporting is network-based in the global configuration,
|
|
# send the RCM packet to the monitoring server
|
|
def call_mon_status(self, _data):
|
|
self._logger.debug('(%s) Repeater Call Monitor Origin Packet Received: %s', self._system, ahex(_data))
|
|
if self._rcm:
|
|
self._report.send_rcm(self._system + ','+ _data)
|
|
|
|
def call_mon_rpt(self, _data):
|
|
self._logger.debug('(%s) Repeater Call Monitor Repeating Packet Received: %s', self._system, ahex(_data))
|
|
if self._rcm:
|
|
self._report.send_rcm(self._system + ',' + _data)
|
|
|
|
def call_mon_nack(self, _data):
|
|
self._logger.debug('(%s) Repeater Call Monitor NACK Packet Received: %s', self._system, ahex(_data))
|
|
if self._rcm:
|
|
self._report.send_rcm(self._system + ',' + _data)
|
|
|
|
def xcmp_xnl(self, _data):
|
|
self._logger.debug('(%s) XCMP/XNL Packet Received: %s', self._system, ahex(_data))
|
|
|
|
def repeater_wake_up(self, _data):
|
|
self._logger.debug('(%s) Repeater Wake-Up Packet Received: %s', self._system, ahex(_data))
|
|
|
|
def group_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
|
|
self._logger.debug('(%s) Group Voice Packet Received From: %s, IPSC Peer %s, Destination %s', self._system, int_id(_src_sub), int_id(_peerid), int_id(_dst_sub))
|
|
|
|
def private_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
|
|
self._logger.debug('(%s) Private Voice Packet Received From: %s, IPSC Peer %s, Destination %s', self._system, int_id(_src_sub), int_id(_peerid), int_id(_dst_sub))
|
|
|
|
def group_data(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
|
|
self._logger.debug('(%s) Group Data Packet Received From: %s, IPSC Peer %s, Destination %s', self._system, int_id(_src_sub), int_id(_peerid), int_id(_dst_sub))
|
|
|
|
def private_data(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
|
|
self._logger.debug('(%s) Private Data Packet Received From: %s, IPSC Peer %s, Destination %s', self._system, int_id(_src_sub), int_id(_peerid), int_id(_dst_sub))
|
|
|
|
def unknown_message(self, _packettype, _peerid, _data):
|
|
self._logger.error('(%s) Unknown Message - Type: %s From: %s Packet: %s', self._system, ahex(_packettype), int_id(_peerid), ahex(_data))
|
|
|
|
|
|
#************************************************
|
|
# IPSC SPECIFIC MAINTENANCE FUNCTIONS
|
|
#************************************************
|
|
|
|
# Simple function to send packets - handy to have it all in one place for debugging
|
|
#
|
|
def send_packet(self, _packet, (_host, _port)):
|
|
if self._local['AUTH_ENABLED']:
|
|
_hash = bhex((hmac_new(self._local['AUTH_KEY'],_packet,sha1)).hexdigest()[:20])
|
|
_packet = _packet + _hash
|
|
self.transport.write(_packet, (_host, _port))
|
|
# USE THE FOLLOWING ONLY UNDER DIRE CIRCUMSTANCES -- PERFORMANCE IS ADVERSLY AFFECTED!
|
|
#self._logger.debug('(%s) TX Packet to %s on port %s: %s', self._system, _host, _port, ahex(_packet))
|
|
|
|
# Accept a complete packet, ready to be sent, and send it to all active peers + master in an IPSC
|
|
#
|
|
def send_to_ipsc(self, _packet):
|
|
if self._local['AUTH_ENABLED']:
|
|
_hash = bhex((hmac_new(self._local['AUTH_KEY'],_packet,sha1)).hexdigest()[:20])
|
|
_packet = _packet + _hash
|
|
# Send to the Master
|
|
if self._master['STATUS']['CONNECTED']:
|
|
self.transport.write(_packet, (self._master['IP'], self._master['PORT']))
|
|
# Send to each connected Peer
|
|
for peer in self._peers.keys():
|
|
if self._peers[peer]['STATUS']['CONNECTED']:
|
|
self.transport.write(_packet, (self._peers[peer]['IP'], self._peers[peer]['PORT']))
|
|
|
|
|
|
# FUNTIONS FOR IPSC MAINTENANCE ACTIVITIES WE RESPOND TO
|
|
|
|
# SOMEONE HAS SENT US A KEEP ALIVE - WE MUST ANSWER IT
|
|
def peer_alive_req(self, _data, _peerid, _host, _port):
|
|
_hex_mode = (_data[5])
|
|
_hex_flags = (_data[6:10])
|
|
_decoded_mode = process_mode_byte(_hex_mode)
|
|
_decoded_flags = process_flags_bytes(_hex_flags)
|
|
|
|
self._peers[_peerid]['MODE'] = _hex_mode
|
|
self._peers[_peerid]['MODE_DECODE'] = _decoded_mode
|
|
self._peers[_peerid]['FLAGS'] = _hex_flags
|
|
self._peers[_peerid]['FLAGS_DECODE'] = _decoded_flags
|
|
self.send_packet(self.PEER_ALIVE_REPLY_PKT, (_host, _port))
|
|
self.reset_keep_alive(_peerid) # Might as well reset our own counter, we know it's out there...
|
|
self._logger.debug('(%s) Keep-Alive reply sent to Peer %s, %s:%s', self._system, int_id(_peerid), _host, _port)
|
|
|
|
# SOMEONE WANTS TO REGISTER WITH US - WE'RE COOL WITH THAT
|
|
def peer_reg_req(self, _peerid, _host, _port):
|
|
self.send_packet(self.PEER_REG_REPLY_PKT, (_host, _port))
|
|
self._logger.info('(%s) Peer Registration Request From: %s, %s:%s', self._system, int_id(_peerid), _host, _port)
|
|
|
|
|
|
# SOMEONE HAS ANSWERED OUR KEEP-ALIVE REQUEST - KEEP TRACK OF IT
|
|
def peer_alive_reply(self, _peerid):
|
|
self.reset_keep_alive(_peerid)
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVES_RECEIVED'] += 1
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVE_RX_TIME'] = int(time())
|
|
self._logger.debug('(%s) Keep-Alive Reply (we sent the request) Received from Peer %s, %s:%s', self._system, int_id(_peerid), self._peers[_peerid]['IP'], self._peers[_peerid]['PORT'])
|
|
|
|
# SOMEONE HAS ANSWERED OUR REQEST TO REGISTER WITH THEM - KEEP TRACK OF IT
|
|
def peer_reg_reply(self, _peerid):
|
|
if _peerid in self._peers.keys():
|
|
self._peers[_peerid]['STATUS']['CONNECTED'] = True
|
|
self._logger.info('(%s) Registration Reply From: %s, %s:%s', self._system, int_id(_peerid), self._peers[_peerid]['IP'], self._peers[_peerid]['PORT'])
|
|
|
|
# OUR MASTER HAS ANSWERED OUR KEEP-ALIVE REQUEST - KEEP TRACK OF IT
|
|
def master_alive_reply(self, _peerid):
|
|
self.reset_keep_alive(_peerid)
|
|
self._master['STATUS']['KEEP_ALIVES_RECEIVED'] += 1
|
|
self._master['STATUS']['KEEP_ALIVE_RX_TIME'] = int(time())
|
|
self._logger.debug('(%s) Keep-Alive Reply (we sent the request) Received from the Master %s, %s:%s', self._system, int_id(_peerid), self._master['IP'], self._master['PORT'])
|
|
|
|
# OUR MASTER HAS SENT US A PEER LIST - PROCESS IT
|
|
def peer_list_reply(self, _data, _peerid):
|
|
self._master['STATUS']['PEER_LIST'] = True
|
|
if len(_data) > 18:
|
|
self.process_peer_list(_data)
|
|
self._logger.debug('(%s) Peer List Reply Received From Master %s, %s:%s', self._system, int_id(_peerid), self._master['IP'], self._master['PORT'])
|
|
|
|
# OUR MASTER HAS ANSWERED OUR REQUEST TO REGISTER - LOTS OF INFORMATION TO TRACK
|
|
def master_reg_reply(self, _data, _peerid):
|
|
_hex_mode = _data[5]
|
|
_hex_flags = _data[6:10]
|
|
_num_peers = _data[10:12]
|
|
_decoded_mode = process_mode_byte(_hex_mode)
|
|
_decoded_flags = process_flags_bytes(_hex_flags)
|
|
|
|
self._local['NUM_PEERS'] = int(ahex(_num_peers), 16)
|
|
self._master['RADIO_ID'] = _peerid
|
|
self._master['MODE'] = _hex_mode
|
|
self._master['MODE_DECODE'] = _decoded_mode
|
|
self._master['FLAGS'] = _hex_flags
|
|
self._master['FLAGS_DECODE'] = _decoded_flags
|
|
self._master_stat['CONNECTED'] = True
|
|
self._master_stat['KEEP_ALIVES_OUTSTANDING'] = 0
|
|
self._logger.warning('(%s) Registration response (we requested reg) from the Master: %s, %s:%s (%s peers)', self._system, int_id(_peerid), self._master['IP'], self._master['PORT'], self._local['NUM_PEERS'])
|
|
|
|
# WE ARE MASTER AND SOMEONE HAS REQUESTED REGISTRATION FROM US - ANSWER IT
|
|
def master_reg_req(self, _data, _peerid, _host, _port):
|
|
_ip_address = _host
|
|
_port = _port
|
|
_hex_mode = _data[5]
|
|
_hex_flags = _data[6:10]
|
|
_decoded_mode = process_mode_byte(_hex_mode)
|
|
_decoded_flags = process_flags_bytes(_hex_flags)
|
|
|
|
self.MASTER_REG_REPLY_PKT = (MASTER_REG_REPLY + self._local_id + self.TS_FLAGS + hex_str_2(self._local['NUM_PEERS']) + IPSC_VER)
|
|
self.send_packet(self.MASTER_REG_REPLY_PKT, (_host, _port))
|
|
self._logger.info('(%s) Master Registration Packet Received from peer %s, %s:%s', self._system, int_id(_peerid), _host, _port)
|
|
|
|
# If this entry was NOT already in our list, add it.
|
|
if _peerid not in self._peers.keys():
|
|
self._peers[_peerid] = {
|
|
'IP': _ip_address,
|
|
'PORT': _port,
|
|
'MODE': _hex_mode,
|
|
'MODE_DECODE': _decoded_mode,
|
|
'FLAGS': _hex_flags,
|
|
'FLAGS_DECODE': _decoded_flags,
|
|
'STATUS': {
|
|
'CONNECTED': True,
|
|
'KEEP_ALIVES_SENT': 0,
|
|
'KEEP_ALIVES_MISSED': 0,
|
|
'KEEP_ALIVES_OUTSTANDING': 0,
|
|
'KEEP_ALIVES_RECEIVED': 0,
|
|
'KEEP_ALIVE_RX_TIME': int(time())
|
|
}
|
|
}
|
|
self._local['NUM_PEERS'] = len(self._peers)
|
|
self._logger.debug('(%s) Peer Added To Peer List: %s, %s:%s (IPSC now has %s Peers)', self._system, self._peers[_peerid], _host, _port, self._local['NUM_PEERS'])
|
|
|
|
# WE ARE MASTER AND SOEMONE SENT US A KEEP-ALIVE - ANSWER IT, TRACK IT
|
|
def master_alive_req(self, _peerid, _host, _port):
|
|
if _peerid in self._peers.keys():
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVES_RECEIVED'] += 1
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVE_RX_TIME'] = int(time())
|
|
self.send_packet(self.MASTER_ALIVE_REPLY_PKT, (_host, _port))
|
|
self._logger.debug('(%s) Master Keep-Alive Request Received from peer %s, %s:%s', self._system, int_id(_peerid), _host, _port)
|
|
else:
|
|
self._logger.warning('(%s) Master Keep-Alive Request Received from *UNREGISTERED* peer %s, %s:%s', self._system, int_id(_peerid), _host, _port)
|
|
|
|
# WE ARE MASTER AND A PEER HAS REQUESTED A PEER LIST - SEND THEM ONE
|
|
def peer_list_req(self, _peerid):
|
|
if _peerid in self._peers.keys():
|
|
self._logger.debug('(%s) Peer List Request from peer %s', self._system, int_id(_peerid))
|
|
self.send_to_ipsc(self.PEER_LIST_REPLY_PKT + build_peer_list(self._peers))
|
|
else:
|
|
self._logger.warning('(%s) Peer List Request Received from *UNREGISTERED* peer %s', self._system, int_id(_peerid))
|
|
|
|
|
|
# Reset the outstanding keep-alive counter for _peerid...
|
|
# Used when receiving acks OR when we see traffic from a repeater, since they ignore keep-alives when transmitting
|
|
#
|
|
def reset_keep_alive(self, _peerid):
|
|
if _peerid in self._peers.keys():
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVES_OUTSTANDING'] = 0
|
|
self._peers[_peerid]['STATUS']['KEEP_ALIVE_RX_TIME'] = int(time())
|
|
if _peerid == self._master['RADIO_ID']:
|
|
self._master_stat['KEEP_ALIVES_OUTSTANDING'] = 0
|
|
|
|
|
|
# THE NEXT SECTION DEFINES FUNCTIONS THAT MUST BE DIFFERENT FOR HASHED AND UNHASHED PACKETS
|
|
# HASHED MEANS AUTHENTICATED IPSC
|
|
# UNHASHED MEANS UNAUTHENTICATED IPSC
|
|
|
|
# NEXT THREE FUNCITONS ARE FOR AUTHENTICATED PACKETS
|
|
|
|
# Take a packet to be SENT, calculate auth hash and return the whole thing
|
|
#
|
|
def hashed_packet(self, _key, _data):
|
|
_hash = bhex((hmac_new(_key,_data,sha1)).hexdigest()[:20])
|
|
return _data + _hash
|
|
|
|
# Remove the hash from a packet and return the payload
|
|
#
|
|
def strip_hash(self, _data):
|
|
return _data[:-10]
|
|
|
|
# Take a RECEIVED packet, calculate the auth hash and verify authenticity
|
|
#
|
|
def validate_auth(self, _key, _data):
|
|
_payload = self.strip_hash(_data)
|
|
_hash = _data[-10:]
|
|
_chk_hash = bhex((hmac_new(_key,_payload,sha1)).hexdigest()[:20])
|
|
|
|
if _chk_hash == _hash:
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
#************************************************
|
|
# TIMED LOOP - CONNECTION MAINTENANCE
|
|
#************************************************
|
|
|
|
# Timed loop initialization (called by the twisted reactor)
|
|
#
|
|
def startProtocol(self):
|
|
# Timed loops for:
|
|
# IPSC connection establishment and maintenance
|
|
# Reporting/Housekeeping
|
|
#
|
|
# IF WE'RE NOT THE MASTER...
|
|
if not self._local['MASTER_PEER']:
|
|
self._peer_maintenance = task.LoopingCall(self.peer_maintenance_loop)
|
|
self._peer_maintenance_loop = self._peer_maintenance.start(self._local['ALIVE_TIMER'])
|
|
#
|
|
# IF WE ARE THE MASTER...
|
|
if self._local['MASTER_PEER']:
|
|
self._master_maintenance = task.LoopingCall(self.master_maintenance_loop)
|
|
self._master_maintenance_loop = self._master_maintenance.start(self._local['ALIVE_TIMER'])
|
|
|
|
|
|
# Timed loop used for IPSC connection Maintenance when we are the MASTER
|
|
#
|
|
def master_maintenance_loop(self):
|
|
self._logger.debug('(%s) MASTER Connection Maintenance Loop Started', self._system)
|
|
update_time = int(time())
|
|
|
|
for peer in self._peers.keys():
|
|
keep_alive_delta = update_time - self._peers[peer]['STATUS']['KEEP_ALIVE_RX_TIME']
|
|
self._logger.debug('(%s) Time Since Last KeepAlive Request from Peer %s: %s seconds', self._system, int_id(peer), keep_alive_delta)
|
|
|
|
if keep_alive_delta > 120:
|
|
self.de_register_peer(peer)
|
|
self.send_to_ipsc(self.PEER_LIST_REPLY_PKT + build_peer_list(self._peers))
|
|
self._logger.warning('(%s) Timeout Exceeded for Peer %s, De-registering', self._system, int_id(peer))
|
|
|
|
# Timed loop used for IPSC connection Maintenance when we are a PEER
|
|
#
|
|
def peer_maintenance_loop(self):
|
|
self._logger.debug('(%s) PEER Connection Maintenance Loop Started', self._system)
|
|
|
|
# If the master isn't connected, we have to do that before we can do anything else!
|
|
#
|
|
if not self._master_stat['CONNECTED']:
|
|
self.send_packet(self.MASTER_REG_REQ_PKT, self._master_sock)
|
|
self._logger.info('(%s) Registering with the Master: %s:%s', self._system, self._master['IP'], self._master['PORT'])
|
|
|
|
# Once the master is connected, we have to send keep-alives.. and make sure we get them back
|
|
elif self._master_stat['CONNECTED']:
|
|
# Send keep-alive to the master
|
|
self.send_packet(self.MASTER_ALIVE_PKT, self._master_sock)
|
|
self._logger.debug('(%s) Keep Alive Sent to the Master: %s, %s:%s', self._system, int_id(self._master['RADIO_ID']) ,self._master['IP'], self._master['PORT'])
|
|
|
|
# If we had a keep-alive outstanding by the time we send another, mark it missed.
|
|
if (self._master_stat['KEEP_ALIVES_OUTSTANDING']) > 0:
|
|
self._master_stat['KEEP_ALIVES_MISSED'] += 1
|
|
self._logger.info('(%s) Master Keep-Alive Missed: %s:%s', self._system, self._master['IP'], self._master['PORT'])
|
|
|
|
# If we have missed too many keep-alives, de-register the master and start over.
|
|
if self._master_stat['KEEP_ALIVES_OUTSTANDING'] >= self._local['MAX_MISSED']:
|
|
self._master_stat['CONNECTED'] = False
|
|
self._master_stat['KEEP_ALIVES_OUTSTANDING'] = 0
|
|
self._logger.error('(%s) Maximum Master Keep-Alives Missed -- De-registering the Master: %s:%s', self._system, self._master['IP'], self._master['PORT'])
|
|
|
|
# Update our stats before we move on...
|
|
self._master_stat['KEEP_ALIVES_SENT'] += 1
|
|
self._master_stat['KEEP_ALIVES_OUTSTANDING'] += 1
|
|
|
|
else:
|
|
# This is bad. If we get this message, we need to reset the state and try again
|
|
self._logger.error('->> (%s) Master in UNKOWN STATE: %s:%s', self._system, self._master_sock)
|
|
self._master_stat['CONNECTED'] = False
|
|
|
|
|
|
# If the master is connected and we don't have a peer-list yet....
|
|
#
|
|
if (self._master_stat['CONNECTED'] == True) and (self._master_stat['PEER_LIST'] == False):
|
|
# Ask the master for a peer-list
|
|
if self._local['NUM_PEERS']:
|
|
self.send_packet(self.PEER_LIST_REQ_PKT, self._master_sock)
|
|
self._logger.info('(%s), No Peer List - Requesting One From the Master', self._system)
|
|
else:
|
|
self._master_stat['PEER_LIST'] = True
|
|
self._logger.debug('(%s), Skip asking for a Peer List, we are the only Peer', self._system)
|
|
|
|
|
|
# If we do have a peer-list, we need to register with the peers and send keep-alives...
|
|
#
|
|
if self._master_stat['PEER_LIST']:
|
|
# Iterate the list of peers... so we do this for each one.
|
|
for peer in self._peers.keys():
|
|
|
|
# We will show up in the peer list, but shouldn't try to talk to ourselves.
|
|
if peer == self._local_id:
|
|
continue
|
|
|
|
# If we haven't registered to a peer, send a registration
|
|
if not self._peers[peer]['STATUS']['CONNECTED']:
|
|
self.send_packet(self.PEER_REG_REQ_PKT, (self._peers[peer]['IP'], self._peers[peer]['PORT']))
|
|
self._logger.info('(%s) Registering with Peer %s, %s:%s', self._system, int_id(peer), self._peers[peer]['IP'], self._peers[peer]['PORT'])
|
|
|
|
# If we have registered with the peer, then send a keep-alive
|
|
elif self._peers[peer]['STATUS']['CONNECTED']:
|
|
self.send_packet(self.PEER_ALIVE_REQ_PKT, (self._peers[peer]['IP'], self._peers[peer]['PORT']))
|
|
self._logger.debug('(%s) Keep-Alive Sent to the Peer %s, %s:%s', self._system, int_id(peer), self._peers[peer]['IP'], self._peers[peer]['PORT'])
|
|
|
|
# If we have a keep-alive outstanding by the time we send another, mark it missed.
|
|
if self._peers[peer]['STATUS']['KEEP_ALIVES_OUTSTANDING'] > 0:
|
|
self._peers[peer]['STATUS']['KEEP_ALIVES_MISSED'] += 1
|
|
self._logger.info('(%s) Peer Keep-Alive Missed for %s, %s:%s', self._system, int_id(peer), self._peers[peer]['IP'], self._peers[peer]['PORT'])
|
|
|
|
# If we have missed too many keep-alives, de-register the peer and start over.
|
|
if self._peers[peer]['STATUS']['KEEP_ALIVES_OUTSTANDING'] >= self._local['MAX_MISSED']:
|
|
self._peers[peer]['STATUS']['CONNECTED'] = False
|
|
#del peer # Becuase once it's out of the dictionary, you can't use it for anything else.
|
|
self._logger.warning('(%s) Maximum Peer Keep-Alives Missed -- De-registering the Peer: %s, %s:%s', self._system, int_id(peer), self._peers[peer]['IP'], self._peers[peer]['PORT'])
|
|
|
|
# Update our stats before moving on...
|
|
self._peers[peer]['STATUS']['KEEP_ALIVES_SENT'] += 1
|
|
self._peers[peer]['STATUS']['KEEP_ALIVES_OUTSTANDING'] += 1
|
|
|
|
|
|
|
|
#************************************************
|
|
# MESSAGE RECEIVED - TAKE ACTION
|
|
#************************************************
|
|
|
|
# Actions for received packets by type: For every packet received, there are some things that we need to do:
|
|
# Decode some of the info
|
|
# Check for auth and authenticate the packet
|
|
# Strip the hash from the end... we don't need it anymore
|
|
#
|
|
# Once they're done, we move on to the processing or callbacks for each packet type.
|
|
#
|
|
# Callbacks are iterated in the order of "more likely" to "less likely" to reduce processing time
|
|
#
|
|
def datagramReceived(self, data, (host, port)):
|
|
_packettype = data[0:1]
|
|
_peerid = data[1:5]
|
|
_ipsc_seq = data[5:6]
|
|
|
|
# AUTHENTICATE THE PACKET
|
|
if self._local['AUTH_ENABLED']:
|
|
if not self.validate_auth(self._local['AUTH_KEY'], data):
|
|
self._logger.warning('(%s) AuthError: IPSC packet failed authentication. Type %s: Peer: %s, %s:%s', self._system, ahex(_packettype), int_id(_peerid), host, port)
|
|
return
|
|
|
|
# REMOVE SHA-1 AUTHENTICATION HASH: WE NO LONGER NEED IT
|
|
else:
|
|
data = self.strip_hash(data)
|
|
|
|
# PACKETS THAT WE RECEIVE FROM ANY VALID PEER OR VALID MASTER
|
|
if _packettype in ANY_PEER_REQUIRED:
|
|
if not(self.valid_master(_peerid) == False or self.valid_peer(_peerid) == False):
|
|
self._logger.warning('(%s) PeerError: Peer not in peer-list: %s, %s:%s', self._system, int_id(_peerid), host, port)
|
|
return
|
|
|
|
# ORIGINATED BY SUBSCRIBER UNITS - a.k.a someone transmitted
|
|
if _packettype in USER_PACKETS:
|
|
# Extract IPSC header not already extracted
|
|
_src_sub = data[6:9]
|
|
_dst_sub = data[9:12]
|
|
_call_type = data[12:13]
|
|
_unknown_1 = data[13:17]
|
|
_call_info = int_id(data[17:18])
|
|
_ts = bool(_call_info & TS_CALL_MSK) + 1
|
|
_end = bool(_call_info & END_MSK)
|
|
|
|
# Extract RTP Header Fields
|
|
'''
|
|
Coming soon kids!!!
|
|
Looks like version, padding, extention, CSIC, payload type and SSID never change.
|
|
The things we might care about are below.
|
|
_rtp_byte_1 = int_id(data[18:19])
|
|
_rtp_byte_2 = int_id(data[19:20])
|
|
_rtp_seq = int_id(data[20:22])
|
|
_rtp_tmstmp = int_id(data[22:26])
|
|
_rtp_ssid = int_id(data[26:30])
|
|
|
|
# Extract RTP Payload Data Fields
|
|
_payload_type = int_id(data[30:31])
|
|
'''
|
|
|
|
# User Voice and Data Call Types:
|
|
if _packettype == GROUP_VOICE:
|
|
self.reset_keep_alive(_peerid)
|
|
self.group_voice(_src_sub, _dst_sub, _ts, _end, _peerid, data)
|
|
return
|
|
|
|
elif _packettype == PVT_VOICE:
|
|
self.reset_keep_alive(_peerid)
|
|
self.private_voice(_src_sub, _dst_sub, _ts, _end, _peerid, data)
|
|
return
|
|
|
|
elif _packettype == GROUP_DATA:
|
|
self.reset_keep_alive(_peerid)
|
|
self.group_data(_src_sub, _dst_sub, _ts, _end, _peerid, data)
|
|
return
|
|
|
|
elif _packettype == PVT_DATA:
|
|
self.reset_keep_alive(_peerid)
|
|
self.private_data(_src_sub, _dst_sub, _ts, _end, _peerid, data)
|
|
return
|
|
return
|
|
|
|
|
|
# MOTOROLA XCMP/XNL CONTROL PROTOCOL: We don't process these (yet)
|
|
elif _packettype == XCMP_XNL:
|
|
self.xcmp_xnl(data)
|
|
return
|
|
|
|
|
|
# ORIGINATED BY PEERS, NOT IPSC MAINTENANCE: Call monitoring is all we've found here so far
|
|
elif _packettype == CALL_MON_STATUS:
|
|
self.call_mon_status(data)
|
|
return
|
|
|
|
elif _packettype == CALL_MON_RPT:
|
|
self.call_mon_rpt(data)
|
|
return
|
|
|
|
elif _packettype == CALL_MON_NACK:
|
|
self.call_mon_nack(data)
|
|
return
|
|
|
|
|
|
# IPSC CONNECTION MAINTENANCE MESSAGES
|
|
elif _packettype == DE_REG_REQ:
|
|
self.de_register_peer(_peerid)
|
|
self._logger.warning('(%s) Peer De-Registration Request From: %s, %s:%s', self._system, int_id(_peerid), host, port)
|
|
return
|
|
|
|
elif _packettype == DE_REG_REPLY:
|
|
self._logger.warning('(%s) Peer De-Registration Reply From: %s, %s:%s', self._system, int_id(_peerid), host, port)
|
|
return
|
|
|
|
elif _packettype == RPT_WAKE_UP:
|
|
self.repeater_wake_up(data)
|
|
self._logger.debug('(%s) Repeater Wake-Up Packet From: %s, %s:%s', self._system, int_id(_peerid), host, port)
|
|
return
|
|
return
|
|
|
|
|
|
# THE FOLLOWING PACKETS ARE RECEIVED ONLY IF WE ARE OPERATING AS A PEER
|
|
|
|
# ONLY ACCEPT FROM A PREVIOUSLY VALIDATED PEER
|
|
if _packettype in PEER_REQUIRED:
|
|
if not self.valid_peer(_peerid):
|
|
self._logger.warning('(%s) PeerError: Peer not in peer-list: %s, %s:%s', self._system, int_id(_peerid), host, port)
|
|
return
|
|
|
|
# REQUESTS FROM PEERS: WE MUST REPLY IMMEDIATELY FOR IPSC MAINTENANCE
|
|
if _packettype == PEER_ALIVE_REQ:
|
|
self.peer_alive_req(data, _peerid, host, port)
|
|
return
|
|
|
|
elif _packettype == PEER_REG_REQ:
|
|
self.peer_reg_req(_peerid, host, port)
|
|
return
|
|
|
|
# ANSWERS FROM REQUESTS WE SENT TO PEERS: WE DO NOT REPLY
|
|
elif _packettype == PEER_ALIVE_REPLY:
|
|
self.peer_alive_reply(_peerid)
|
|
return
|
|
|
|
elif _packettype == PEER_REG_REPLY:
|
|
self.peer_reg_reply(_peerid)
|
|
return
|
|
return
|
|
|
|
|
|
# PACKETS ONLY ACCEPTED FROM OUR MASTER
|
|
|
|
# PACKETS WE ONLY ACCEPT IF WE HAVE FINISHED REGISTERING WITH OUR MASTER
|
|
if _packettype in MASTER_REQUIRED:
|
|
if not self.valid_master(_peerid):
|
|
self._logger.warning('(%s) MasterError: %s, %s:%s is not the master peer', self._system, int_id(_peerid), host, port)
|
|
return
|
|
|
|
# ANSWERS FROM REQUESTS WE SENT TO THE MASTER: WE DO NOT REPLY
|
|
if _packettype == MASTER_ALIVE_REPLY:
|
|
self.master_alive_reply(_peerid)
|
|
return
|
|
|
|
elif _packettype == PEER_LIST_REPLY:
|
|
self.peer_list_reply(data, _peerid)
|
|
return
|
|
return
|
|
|
|
# THIS MEANS WE HAVE SUCCESSFULLY REGISTERED TO OUR MASTER - RECORD MASTER INFORMATION
|
|
elif _packettype == MASTER_REG_REPLY:
|
|
self.master_reg_reply(data, _peerid)
|
|
return
|
|
|
|
|
|
# THE FOLLOWING PACKETS ARE RECEIVED ONLLY IF WE ARE OPERATING AS A MASTER
|
|
# REQUESTS FROM PEERS: WE MUST REPLY IMMEDIATELY FOR IPSC MAINTENANCE
|
|
|
|
# REQUEST TO REGISTER TO THE IPSC
|
|
elif _packettype == MASTER_REG_REQ:
|
|
self.master_reg_req(data, _peerid, host, port)
|
|
return
|
|
|
|
# REQUEST FOR A KEEP-ALIVE REPLY (WE KNOW THE PEER IS STILL ALIVE TOO)
|
|
elif _packettype == MASTER_ALIVE_REQ:
|
|
self.master_alive_req(_peerid, host, port)
|
|
return
|
|
|
|
# REQUEST FOR A PEER LIST
|
|
elif _packettype == PEER_LIST_REQ:
|
|
self.peer_list_req(_peerid)
|
|
return
|
|
|
|
# PACKET IS OF AN UNKNOWN TYPE. LOG IT AND IDENTTIFY IT!
|
|
else:
|
|
self.unknown_message(_packettype, _peerid, data)
|
|
return
|
|
|
|
|
|
#
|
|
# Socket-based reporting section
|
|
#
|
|
class report(NetstringReceiver):
|
|
def __init__(self, factory):
|
|
self._factory = factory
|
|
|
|
def connectionMade(self):
|
|
self._factory.clients.append(self)
|
|
self._factory._logger.info('DMRlink reporting client connected: %s', self.transport.getPeer())
|
|
|
|
def connectionLost(self, reason):
|
|
self._factory._logger.info('DMRlink reporting client disconnected: %s', self.transport.getPeer())
|
|
self._factory.clients.remove(self)
|
|
|
|
def stringReceived(self, data):
|
|
self.process_message(data)
|
|
|
|
def process_message(self, _message):
|
|
opcode = _message[:1]
|
|
if opcode == REPORT_OPCODES['CONFIG_REQ']:
|
|
self._factory._logger.info('DMRlink reporting client sent \'CONFIG_REQ\': %s', self.transport.getPeer())
|
|
self.send_config()
|
|
else:
|
|
print('got unknown opcode')
|
|
|
|
class reportFactory(Factory):
|
|
def __init__(self, config, logger):
|
|
self._config = config
|
|
self._logger = logger
|
|
|
|
def buildProtocol(self, addr):
|
|
if (addr.host) in self._config['REPORTS']['REPORT_CLIENTS']:
|
|
return report(self)
|
|
else:
|
|
return None
|
|
|
|
def send_clients(self, _message):
|
|
for client in self.clients:
|
|
client.sendString(_message)
|
|
|
|
def send_config(self):
|
|
serialized = pickle.dumps(self._config['SYSTEMS'], protocol=pickle.HIGHEST_PROTOCOL)
|
|
self.send_clients(REPORT_OPCODES['CONFIG_SND']+serialized)
|
|
|
|
def send_rcm(self, _data):
|
|
self.send_clients(REPORT_OPCODES['RCM_SND']+_data)
|
|
|
|
|
|
#************************************************
|
|
# MAIN PROGRAM LOOP STARTS HERE
|
|
#************************************************
|
|
|
|
if __name__ == '__main__':
|
|
import argparse
|
|
import sys
|
|
import os
|
|
import signal
|
|
|
|
from ipsc.dmrlink_config import build_config
|
|
from ipsc.dmrlink_log import config_logging
|
|
|
|
# Change the current directory to the location of the application
|
|
os.chdir(os.path.dirname(os.path.realpath(sys.argv[0])))
|
|
|
|
# CLI argument parser - handles picking up the config file from the command line, and sending a "help" message
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('-c', '--config', action='store', dest='CFG_FILE', help='/full/path/to/config.file (usually dmrlink.cfg)')
|
|
parser.add_argument('-ll', '--log_level', action='store', dest='LOG_LEVEL', help='Override config file logging level.')
|
|
parser.add_argument('-lh', '--log_handle', action='store', dest='LOG_HANDLERS', help='Override config file logging handler.')
|
|
cli_args = parser.parse_args()
|
|
|
|
if not cli_args.CFG_FILE:
|
|
cli_args.CFG_FILE = os.path.dirname(os.path.abspath(__file__))+'/dmrlink.cfg'
|
|
|
|
# Call the external routine to build the configuration dictionary
|
|
CONFIG = build_config(cli_args.CFG_FILE)
|
|
|
|
# Call the external routing to start the system logger
|
|
if cli_args.LOG_LEVEL:
|
|
CONFIG['LOGGER']['LOG_LEVEL'] = cli_args.LOG_LEVEL
|
|
if cli_args.LOG_HANDLERS:
|
|
CONFIG['LOGGER']['LOG_HANDLERS'] = cli_args.LOG_HANDLERS
|
|
logger = config_logging(CONFIG['LOGGER'])
|
|
logger.info('DMRlink \'dmrlink.py\' (c) 2013 - 2015 N0MJS & the K0USY Group - SYSTEM STARTING...')
|
|
|
|
# Set signal handers so that we can gracefully exit if need be
|
|
def sig_handler(_signal, _frame):
|
|
logger.info('*** DMRLINK IS TERMINATING WITH SIGNAL %s ***', str(_signal))
|
|
for system in systems:
|
|
systems[system].de_register_self()
|
|
reactor.stop()
|
|
|
|
for sig in [signal.SIGTERM, signal.SIGINT, signal.SIGQUIT]:
|
|
signal.signal(sig, sig_handler)
|
|
|
|
# INITIALIZE THE REPORTING LOOP
|
|
report_server = config_reports(CONFIG, logger, reportFactory)
|
|
|
|
# Build ID Aliases
|
|
peer_ids, subscriber_ids, talkgroup_ids, local_ids = build_aliases(CONFIG, logger)
|
|
|
|
# INITIALIZE AN IPSC OBJECT (SELF SUSTAINING) FOR EACH CONFIGRUED IPSC
|
|
systems = mk_ipsc_systems(CONFIG, logger, systems, IPSC, report_server)
|
|
|
|
|
|
|
|
# INITIALIZATION COMPLETE -- START THE REACTOR
|
|
reactor.run()
|