HBLink/hb_router.py

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#!/usr/bin/env python
#
# This work is licensed under the Creative Attribution-NonCommercial-ShareAlike
# 3.0 Unported License.To view a copy of this license, visit
# http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to
# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
# California, 94041, USA.
from __future__ import print_function
# Python modules we need
import sys
from binascii import b2a_hex as h
# Debugging functions
from pprint import pprint
# Twisted is pretty important, so I keep it separate
from twisted.internet.protocol import DatagramProtocol
from twisted.internet import reactor
from twisted.internet import task
# Things we import from the main hblink module
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from hblink import CONFIG, HBMASTER, HBCLIENT, logger, systems, hex_str_3, int_id
# Import Bridging rules
# Note: A stanza *must* exist for any MASTER or CLIENT configured in the main
# configuration file and listed as "active". It can be empty,
# but it has to exist.
try:
from hb_routing_rules import RULES as RULES_FILE
logger.info('Routing rules file found and rules imported')
except ImportError:
sys.exit('Routing rules file not found or invalid')
# Convert integer GROUP ID numbers from the config into hex strings
# we need to send in the actual data packets.
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for _system in RULES_FILE:
for _rule in RULES_FILE[_system]['GROUP_VOICE']:
_rule['SRC_GROUP'] = hex_str_3(_rule['SRC_GROUP'])
_rule['DST_GROUP'] = hex_str_3(_rule['DST_GROUP'])
_rule['SRC_TS'] = _rule['SRC_TS']
_rule['DST_TS'] = _rule['DST_TS']
for i, e in enumerate(_rule['ON']):
_rule['ON'][i] = hex_str_3(_rule['ON'][i])
for i, e in enumerate(_rule['OFF']):
_rule['OFF'][i] = hex_str_3(_rule['OFF'][i])
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if _system not in CONFIG['SYSTEMS']:
sys.exit('ERROR: Routing rules found for system not configured main configuration')
for _system in CONFIG['SYSTEMS']:
if _system not in RULES_FILE:
sys.exit('ERROR: Routing rules not found for all systems configured')
RULES = RULES_FILE
# TEMPORARY DEBUGGING LINE -- TO BE REMOVED LATER
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#pprint(RULES)
# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
__author__ = 'Cortney T. Buffington, N0MJS'
__copyright__ = 'Copyright (c) 2016 Cortney T. Buffington, N0MJS and the K0USY Group'
__credits__ = 'Colin Durbridge, G4EML, Steve Zingman, N4IRS; Mike Zingman, N4IRR; Jonathan Naylor, G4KLX; Hans Barthen, DL5DI; Torsten Shultze, DG1HT'
__license__ = 'Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported'
__maintainer__ = 'Cort Buffington, N0MJS'
__email__ = 'n0mjs@me.com'
__status__ = 'pre-alpha'
class routerMASTER(HBMASTER):
def dmrd_received(self, _radio_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _stream_id, _data):
_bits = int_id(_data[15])
if _call_type == 'group':
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_routed = False
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for rule in RULES[self._master]['GROUP_VOICE']:
_target = rule['DST_NET']
if (rule['SRC_GROUP'] == _dst_id and rule['SRC_TS'] == _slot and rule['ACTIVE'] == True):
if rule['SRC_TS'] != rule['DST_TS']:
_tmp_bits = _bits ^ 1 << 7
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else:
_tmp_bits = _bits
_tmp_data = _data[:8] + rule['DST_GROUP'] + _data[11:15] + chr(_tmp_bits) + _data[16:]
print(h(_data))
print(h(_tmp_data))
systems[_target].send_system(_tmp_data)
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_routed = True
logger.debug('(%s) Packet routed to %s system: %s', self._master, CONFIG['SYSTEMS'][_target]['MODE'], _target)
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if not _routed:
logger.debug('(%s) Packet router no target TS/TGID %s/%s', self._master, _slot, int_id(_dst_id))
class routerCLIENT(HBCLIENT):
def dmrd_received(self, _radio_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _stream_id, _data):
_bits = int_id(_data[15])
if _call_type == 'group':
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_routed = False
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for rule in RULES[self._client]['GROUP_VOICE']:
_target = rule['DST_NET']
if (rule['SRC_GROUP'] == _dst_id and rule['SRC_TS'] == _slot and rule['ACTIVE'] == True):
if rule['SRC_TS'] != rule['DST_TS']:
_tmp_bits = _bits ^ 1 << 7
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else:
_tmp_bits = _bits
_tmp_data = _data[:8] + rule['DST_GROUP'] + _data[11:15] + chr(_bits) + _data[16:]
print(h(_data))
print(h(_tmp_data))
systems[_target].send_system(_tmp_data)
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_routed = True
logger.debug('(%s) Packet routed to %s system: %s', self._client, CONFIG['SYSTEMS'][_target]['MODE'], _target)
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if not _routed:
logger.debug('(%s) Packet router no target TS/TGID %s/%s', self._client, _slot, int_id(_dst_id))
#************************************************
# MAIN PROGRAM LOOP STARTS HERE
#************************************************
if __name__ == '__main__':
logger.info('HBlink \'hb_router.py\' (c) 2016 N0MJS & the K0USY Group - SYSTEM STARTING...')
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# HBlink instance creation
for system in CONFIG['SYSTEMS']:
if CONFIG['SYSTEMS'][system]['ENABLED']:
if CONFIG['SYSTEMS'][system]['MODE'] == 'MASTER':
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systems[system] = routerMASTER(system)
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elif CONFIG['SYSTEMS'][system]['MODE'] == 'CLIENT':
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systems[system] = routerCLIENT(system)
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reactor.listenUDP(CONFIG['SYSTEMS'][system]['PORT'], systems[system], interface=CONFIG['SYSTEMS'][system]['IP'])
logger.debug('%s instance created: %s, %s', CONFIG['SYSTEMS'][system]['MODE'], system, systems[system])
reactor.run()