MANY CHANGES
Bridging works well. Backup and standard are consolidated to one application, better documentation, bridging rules file greatly simplified.
This commit is contained in:
Cort Buffington
parent
5e5719eb2e
commit
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123
backup_bridge.py
123
backup_bridge.py
@ -1,123 +0,0 @@
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#!/usr/bin/env python
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#
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# This work is licensed under the Creative Commons Attribution-ShareAlike
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# 3.0 Unported License.To view a copy of this license, visit
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# http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to
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# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
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# California, 94041, USA.
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# This is a sample application to bridge traffic between IPSC networks
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from __future__ import print_function
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from twisted.internet import reactor
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from twisted.internet import task
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from binascii import b2a_hex as h
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import sys
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from dmrlink import IPSC, NETWORK, networks, send_to_ipsc, dmr_nat, logger, hex_str_4, int_id
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2014 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = 'Adam Fast, KC0YLK, Dave K, and he who wishes not to be named'
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__license__ = 'Creative Commons Attribution-ShareAlike 3.0 Unported'
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__version__ = '0.1b'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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__status__ = 'Beta'
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# Import Bridging rules
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# Note: A stanza *must* exist for any IPSC configured in the main
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# configuration file. It can be empty, but it has to exist.
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#
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try:
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from bridge_rules import RULES
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logger.info('Bridge rules file found and rules imported')
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except ImportError:
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sys.exit('Bridging rules file not found or invalid')
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# Import List of Bridges
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# This is how we identify known bridges. If one of these is present
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# and it's mode byte is set to bridge, we don't
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#
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try:
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from known_bridges import BRIDGES
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logger.info('Known bridges file found and bridge ID list imported ')
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except ImportError:
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logger.critical('(backup_bridge.py) NO BRIDGES FILE FOUND, INITIALIZING NULL')
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BRIDGES = []
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class bridgeIPSC(IPSC):
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def __init__(self, *args, **kwargs):
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IPSC.__init__(self, *args, **kwargs)
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self.BRIDGE = False
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self.ACTIVE_CALLS = []
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logger.info('(%s) Initializing bridge status as: %s', self._network, self.BRIDGE)
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def startProtocol(self):
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IPSC.startProtocol(self)
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self._bridge_presence = task.LoopingCall(self.bridge_presence_loop)
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self._bridge_presence_loop = self._bridge_presence.start(self._local['ALIVE_TIMER'])
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def bridge_presence_loop(self):
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_temp_bridge = True
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for peer in BRIDGES:
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_peer = hex_str_4(peer)
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if _peer in self._peers.keys() and (self._peers[_peer]['MODE_DECODE']['TS_1'] or self._peers[_peer]['MODE_DECODE']['TS_2']):
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_temp_bridge = False
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logger.debug('(%s) Peer %s is an active bridge', self._network, int_id(_peer))
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if _peer == self._master['RADIO_ID'] \
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and self._master['STATUS']['CONNECTED'] \
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and (self._master['MODE_DECODE']['TS_1'] or self._master['MODE_DECODE']['TS_2']):
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_temp_bridge = False
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logger.debug('(%s) Master %s is an active bridge',self._network, int_id(_peer))
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if self.BRIDGE != _temp_bridge:
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logger.info('(%s) Changing bridge status to: %s', self._network, _temp_bridge )
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self.BRIDGE = _temp_bridge
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#************************************************
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# CALLBACK FUNCTIONS FOR USER PACKET TYPES
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#************************************************
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#
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def group_voice(self, _network, _src_sub, _dst_group, _ts, _end, _peerid, _data):
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if _ts not in self.ACTIVE_CALLS:
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self.ACTIVE_CALLS.append(_ts)
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# send repeater wake up, but send them when a repeater is likely not TXing check time since end (see below)
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if _end:
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self.ACTIVE_CALLS.remove(_ts)
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# flag the time here so we can test to see if the last call ended long enough ago to send a wake-up
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# timer = time()
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for rule in RULES[_network]['GROUP_VOICE']:
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_target = rule['DST_NET']
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# Matching for rules is against the Destination Group in the SOURCE packet (SRC_GROUP)
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if rule['SRC_GROUP'] == _dst_group and rule['SRC_TS'] == _ts and (self.BRIDGE == True or networks[_target].BRIDGE == True):
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_tmp_data = _data
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# Re-Write the IPSC SRC to match the target network's ID
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_tmp_data = _tmp_data.replace(_peerid, NETWORK[_target]['LOCAL']['RADIO_ID'])
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# Re-Write the destination Group ID
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_tmp_data = _tmp_data.replace(_dst_group, rule['DST_GROUP'])
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# Calculate and append the authentication hash for the target network... if necessary
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if NETWORK[_target]['LOCAL']['AUTH_ENABLED']:
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_tmp_data = self.hashed_packet(NETWORK[_target]['LOCAL']['AUTH_KEY'], _tmp_data)
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# Send the packet to all peers in the target IPSC
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send_to_ipsc(_target, _tmp_data)
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if __name__ == '__main__':
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logger.info('DMRlink \'bridge.py\' (c) 2013, 2014 N0MJS & the K0USY Group - SYSTEM STARTING...')
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for ipsc_network in NETWORK:
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if NETWORK[ipsc_network]['LOCAL']['ENABLED']:
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networks[ipsc_network] = bridgeIPSC(ipsc_network)
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reactor.listenUDP(NETWORK[ipsc_network]['LOCAL']['PORT'], networks[ipsc_network])
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reactor.run()
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200
bridge.py
200
bridge.py
@ -6,78 +6,200 @@
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# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
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# California, 94041, USA.
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# This is a sample application to bridge traffic between IPSC networks
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# This is a sample application to bridge traffic between IPSC networks. it uses
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# one required (bridge_rules.py) and one optional (known_bridges.py) additional
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# configuration files. Both files have their own documentation for use.
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#
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# "bridge_rules" contains the IPSC network, Timeslot and TGID matching rules to
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# determine which voice calls are bridged between IPSC networks and which are
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# not.
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#
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# "known_bridges" contains DMR radio ID numbers of known bridges. This file is
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# used when you want bridge.py to be "polite" or serve as a backup bridge. If
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# a known bridge exists in either a source OR target IPSC network, then no
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# bridging between those IPSC networks will take place. This behavior is
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# dynamic and updates each keep-alive interval (main configuration file).
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# For faster failover, configure a short keep-alive time and a low number of
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# missed keep-alives before timout. I recommend 5 sec keep-alive and 3 missed.
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# That gives a worst-case scenario of 15 seconds to fail over. Recovery will
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# typically happen with a single "blip" in the transmission up to about 5
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# seconds.
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#
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# While this file is listed as Beta status, K0USY Group depends on this code
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# for the bridigng of it's many repeaters. We consider it reliable, but you
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# get what you pay for... as usual, no guarantees.
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from __future__ import print_function
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from twisted.internet import reactor
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from twisted.internet import task
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from binascii import b2a_hex as h
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import sys
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from dmrlink import IPSC, NETWORK, networks, send_to_ipsc, dmr_nat, logger
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from dmrlink import IPSC, NETWORK, networks, send_to_ipsc, dmr_nat, logger, hex_str_3, hex_str_4, int_id
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2013, 2014 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = 'Adam Fast, KC0YLK, Dave K, and he who wishes not to be named'
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__license__ = 'Creative Commons Attribution-ShareAlike 3.0 Unported'
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__version__ = '0.2a'
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__version__ = '0.2b'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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__status__ = 'Production'
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__status__ = 'Beta'
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NAT = 0
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#NAT = '\x2f\x9b\x80'
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# Notes and pieces of next steps...
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# RPT_WAKE_UP = b'\x85' + NETWORK[_network]['LOCAL']['RADIO_ID] + b'\x00\x00\x00\x01' + b'\x01' + b'\x01'
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# TS1 = 0, TS2 = 1
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# Import Bridging rules
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# Note: A stanza *must* exist for any IPSC configured in the main
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# configuration file and listed as "active". It can be empty,
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# but it has to exist.
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#
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try:
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from bridge_rules import RULES
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logger.info('Bridge rules file found and rules imported')
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except ImportError:
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sys.exit('Bridging rules file not found or invalid')
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# Convert integer GROUP ID numbers from the config into hex strings
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# we need to send in the actual data packets.
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#
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class bridgeIPSC(IPSC):
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for _ipsc in RULES:
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for _rule in RULES[_ipsc]['GROUP_VOICE']:
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_rule['SRC_GROUP'] = hex_str_3(_rule['SRC_GROUP'])
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_rule['DST_GROUP'] = hex_str_3(_rule['DST_GROUP'])
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print()
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# Import List of Bridges
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# This is how we identify known bridges. If one of these is present
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# and it's mode byte is set to bridge, we don't
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#
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try:
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from known_bridges import BRIDGES
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logger.info('Known bridges file found and bridge ID list imported ')
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except ImportError:
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logger.critical('\'known_bridges.py\' not found - backup bridge service will not be enabled')
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BRIDGES = []
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# The class methods we override, including __init__ will be different
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# depending on whether or not there is a known_bridges.py file, and
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# hence whether or not we will implement backup/polite bridging or
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# not (standard bridging). So, we test to see if the known bridges
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# data structure "BRIDGES" was imported and had entries or not. If
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# it did not import or did not have any entries, standard bridging
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# is used.
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#
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if BRIDGES:
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logger.info('Initializing class methods for backup/polite bridging')
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class bridgeIPSC(IPSC):
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def __init__(self, *args, **kwargs):
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IPSC.__init__(self, *args, **kwargs)
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self.ACTIVE_CALLS = []
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def __init__(self, *args, **kwargs):
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IPSC.__init__(self, *args, **kwargs)
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self.BRIDGE = False
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self.ACTIVE_CALLS = []
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logger.info('(%s) Initializing bridge status as: %s', self._network, self.BRIDGE)
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# Setup the backup/polite bridging maintenance loop (based on keep-alive timer)
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def startProtocol(self):
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IPSC.startProtocol(self)
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#************************************************
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# CALLBACK FUNCTIONS FOR USER PACKET TYPES
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#************************************************
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#
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def group_voice(self, _network, _src_sub, _dst_group, _ts, _end, _peerid, _data):
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if _ts not in self.ACTIVE_CALLS:
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self.ACTIVE_CALLS.append(_ts)
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# send repeater wake up, but send them when a repeater is likely not TXing check time since end (see below)
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if _end:
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self.ACTIVE_CALLS.remove(_ts)
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# flag the time here so we can test to see if the last call ended long enough ago to send a wake-up
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# timer = time()
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self._bridge_presence = task.LoopingCall(self.bridge_presence_loop)
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self._bridge_presence_loop = self._bridge_presence.start(self._local['ALIVE_TIMER'])
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# This is the backup/polite bridge maintenance loop
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def bridge_presence_loop(self):
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_temp_bridge = True
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for peer in BRIDGES:
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_peer = hex_str_4(peer)
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for rule in RULES[_network]['GROUP_VOICE']:
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# Matching for rules is against the Destination Group in the SOURCE packet (SRC_GROUP)
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if rule['SRC_GROUP'] == _dst_group and rule['SRC_TS'] == _ts:
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_tmp_data = _data
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if _peer in self._peers.keys() and (self._peers[_peer]['MODE_DECODE']['TS_1'] or self._peers[_peer]['MODE_DECODE']['TS_2']):
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_temp_bridge = False
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logger.debug('(%s) Peer %s is an active bridge', self._network, int_id(_peer))
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if _peer == self._master['RADIO_ID'] \
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and self._master['STATUS']['CONNECTED'] \
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and (self._master['MODE_DECODE']['TS_1'] or self._master['MODE_DECODE']['TS_2']):
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_temp_bridge = False
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logger.debug('(%s) Master %s is an active bridge',self._network, int_id(_peer))
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if self.BRIDGE != _temp_bridge:
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logger.info('(%s) Changing bridge status to: %s', self._network, _temp_bridge )
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self.BRIDGE = _temp_bridge
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#************************************************
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# CALLBACK FUNCTIONS FOR USER PACKET TYPES
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#************************************************
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#
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def group_voice(self, _network, _src_sub, _dst_group, _ts, _end, _peerid, _data):
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if _ts not in self.ACTIVE_CALLS:
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self.ACTIVE_CALLS.append(_ts)
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# send repeater wake up, but send them when a repeater is likely not TXing check time since end (see below)
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if _end:
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self.ACTIVE_CALLS.remove(_ts)
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# flag the time here so we can test to see if the last call ended long enough ago to send a wake-up
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# timer = time()
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for rule in RULES[_network]['GROUP_VOICE']:
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_target = rule['DST_NET']
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# Re-Write the IPSC SRC to match the target network's ID
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_tmp_data = _tmp_data.replace(_peerid, NETWORK[_target]['LOCAL']['RADIO_ID'])
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# Re-Write the destination Group ID
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_tmp_data = _tmp_data.replace(_dst_group, rule['DST_GROUP'])
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# Matching for rules is against the Destination Group in the SOURCE packet (SRC_GROUP)
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if rule['SRC_GROUP'] == _dst_group and rule['SRC_TS'] == _ts and (self.BRIDGE == True or networks[_target].BRIDGE == True):
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_tmp_data = _data
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# Re-Write the IPSC SRC to match the target network's ID
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_tmp_data = _tmp_data.replace(_peerid, NETWORK[_target]['LOCAL']['RADIO_ID'])
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# Re-Write the destination Group ID
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_tmp_data = _tmp_data.replace(_dst_group, rule['DST_GROUP'])
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# Calculate and append the authentication hash for the target network... if necessary
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if NETWORK[_target]['LOCAL']['AUTH_ENABLED']:
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_tmp_data = self.hashed_packet(NETWORK[_target]['LOCAL']['AUTH_KEY'], _tmp_data)
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# Send the packet to all peers in the target IPSC
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send_to_ipsc(_target, _tmp_data)
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else:
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logger.info('Initializing class methods for standard bridging')
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class bridgeIPSC(IPSC):
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def __init__(self, *args, **kwargs):
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IPSC.__init__(self, *args, **kwargs)
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self.ACTIVE_CALLS = []
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#************************************************
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# CALLBACK FUNCTIONS FOR USER PACKET TYPES
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#************************************************
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#
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def group_voice(self, _network, _src_sub, _dst_group, _ts, _end, _peerid, _data):
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if _ts not in self.ACTIVE_CALLS:
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self.ACTIVE_CALLS.append(_ts)
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# send repeater wake up, but send them when a repeater is likely not TXing check time since end (see below)
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if _end:
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self.ACTIVE_CALLS.remove(_ts)
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# flag the time here so we can test to see if the last call ended long enough ago to send a wake-up
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# timer = time()
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for rule in RULES[_network]['GROUP_VOICE']:
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# Matching for rules is against the Destination Group in the SOURCE packet (SRC_GROUP)
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if rule['SRC_GROUP'] == _dst_group and rule['SRC_TS'] == _ts:
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_tmp_data = _data
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_target = rule['DST_NET']
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# Re-Write the IPSC SRC to match the target network's ID
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_tmp_data = _tmp_data.replace(_peerid, NETWORK[_target]['LOCAL']['RADIO_ID'])
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# Re-Write the destination Group ID
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_tmp_data = _tmp_data.replace(_dst_group, rule['DST_GROUP'])
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# Calculate and append the authentication hash for the target network... if necessary
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if NETWORK[_target]['LOCAL']['AUTH_ENABLED']:
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_tmp_data = self.hashed_packet(NETWORK[_target]['LOCAL']['AUTH_KEY'], _tmp_data)
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# Send the packet to all peers in the target IPSC
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send_to_ipsc(_target, _tmp_data)
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# NAT doesn't work well... use at your own risk!
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if NAT:
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_tmp_data = dmr_nat(_tmp_data, _src_sub, NAT)
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# Calculate and append the authentication hash for the target network... if necessary
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if NETWORK[_target]['LOCAL']['AUTH_ENABLED']:
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_tmp_data = self.hashed_packet(NETWORK[_target]['LOCAL']['AUTH_KEY'], _tmp_data)
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# Send the packet to all peers in the target IPSC
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send_to_ipsc(_target, _tmp_data)
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if __name__ == '__main__':
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logger.info('DMRlink \'bridge.py\' (c) 2013, 2014 N0MJS & the K0USY Group - SYSTEM STARTING...')
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@ -1,27 +1,31 @@
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'''
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The following is an example for your bridge_rules file. Note, all bridging is ONE-WAY!
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Rules for an IPSC network indicate destination IPSC network for the Group ID specified
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(allowing transcoding of the Group ID to a different value). Group IDs are specified
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as hex strings.
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(allowing transcoding of the Group ID to a different value). Group IDs used to be
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hex strings, then a function was added to convert them, now that function has been
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moved into the bridge.py (program file) to make this file as simple and easy as
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possible
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The IPSC name must match an IPSC name from dmrlink.cfg.
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The IPSC name must match an IPSC name from dmrlink.cfg, and any IPSC network defined
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as "active" in the dmrlink.cfg *MUST* have an entry here. It may be an empty entry,
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but there must be one so that the data structure can be parsed.
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The example below cross-patches TGID 1 on an IPSC network named "IPSC_FOO" with TGID 2
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on an IPSC network named "IPSC_BAR".
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on an IPSC network named "IPSC_BAR". Note, one entry must be made on EACH IPSC network
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(IPSC_FOO and IPSC_BAR in this example) for bridging to occur in both directions.
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THIS EXAMPLE WILL NOT WORK AS IT IS - YOU MUST SPECIFY NAMES AND GROUP IDS!!!
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NOTE: Timeslot transcoding does not yet work (SRC_TS) and (DST_TS) are ignored
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NOTES:
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* Timeslot transcoding does not yet work (SRC_TS) and (DST_TS) are ignored.
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* Only GROUP_VOICE is currently used by the bridge.py appication, the other
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types are placeholders for when it does more.
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'''
|
||||
|
||||
def id(_id):
|
||||
# Create a 3 byte TGID or UID from an integer
|
||||
return hex(_id)[2:].rjust(6,'0').decode('hex')
|
||||
|
||||
RULES = {
|
||||
'IPSC_FOO': {
|
||||
'GROUP_VOICE': [
|
||||
{'SRC_GROUP': id(1), 'SRC_TS': 1, 'DST_NET': 'IPSC_BAR', 'DST_GROUP': id(2), 'DST_TS': 1},
|
||||
{'SRC_GROUP': 1, 'SRC_TS': 1, 'DST_NET': 'IPSC_BAR', 'DST_GROUP': 2, 'DST_TS': 1},
|
||||
# Repeat the above line for as many rules for this IPSC network as you want.
|
||||
],
|
||||
'PRIVATE_VOICE': [
|
||||
@ -31,9 +35,9 @@ RULES = {
|
||||
'PRIVATE_DATA': [
|
||||
]
|
||||
},
|
||||
'IPSC_BAR:' {
|
||||
'IPSC_BAR': {
|
||||
'GROUP_VOICE': [
|
||||
{'SRC_GROUP': id(2), 'SRC_TS': 1, 'DST_NET': 'IPSC_FOO', 'DST_GROUP': id(1), 'DST_TS': 1},
|
||||
{'SRC_GROUP': 2, 'SRC_TS': 1, 'DST_NET': 'IPSC_FOO', 'DST_GROUP': 1, 'DST_TS': 1},
|
||||
# Repeat the above line for as many rules for this IPSC network as you want.
|
||||
],
|
||||
'PRIVATE_VOICE': [
|
||||
@ -43,4 +47,4 @@ RULES = {
|
||||
'PRIVATE_DATA': [
|
||||
]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,5 +1,26 @@
|
||||
'''
|
||||
The following is an example for your "known_bridges" file. This is a
|
||||
simple list (in python syntax) of integer DMR radios IDs of bridges
|
||||
that we expect to encounter.
|
||||
|
||||
You should only add bridges that will be encountered - adding a bunch
|
||||
of bridges just because will really slow things down, so don't do it.
|
||||
Please note each line but the last must end in a comma. This is about
|
||||
the only thing you can mess up... but I manage to bork that one every
|
||||
3rd time or so I make updates, so watch out.
|
||||
|
||||
A bridge that is "encountered" means another bridge that might be in
|
||||
the same IPSC network we're going to try to bridge for. This is useful
|
||||
only in the case where we want to provide backup bridging service.
|
||||
There are cases when you do NOT want to use this feature -- say for
|
||||
example if one IPSC has two bridges but they're bridging different
|
||||
talkgroups.
|
||||
'''
|
||||
|
||||
BRIDGES = [
|
||||
123456,
|
||||
234567,
|
||||
345678
|
||||
]
|
||||
]
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user