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HBLink3/bridge.py
Cort Buffington 90a889ec3b Large updates, mostly contact to join
2019-01-07 09:44:36 -06:00

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#!/usr/bin/env python
#
###############################################################################
# Copyright (C) 2016-2018 Cortney T. Buffington, N0MJS <n0mjs@me.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
###############################################################################
'''
This application, in conjuction with it's rule file (rules.py) will
work like a "conference bridge". This is similar to what most hams think of as a
reflector. You define conference bridges and any system joined to that conference
bridge will both receive traffic from, and send traffic to any other system
joined to the same conference bridge. It does not provide end-to-end connectivity
as each end system must individually be joined to a conference bridge (a name
you create in the configuraiton file) to pass traffic.
This program currently only works with group voice calls.
'''
# Python modules we need
import sys
from bitarray import bitarray
from time import time
from importlib import import_module
# Twisted is pretty important, so I keep it separate
from twisted.internet.protocol import Factory, Protocol
from twisted.protocols.basic import NetstringReceiver
from twisted.internet import reactor, task
# Things we import from the main hblink module
from hblink import HBSYSTEM, OPENBRIDGE, systems, hblink_handler, reportFactory, REPORT_OPCODES, mk_aliases
from dmr_utils3.utils import bytes_3, int_id, get_alias
from dmr_utils3 import decode, bptc, const
import config
import log
from const import *
# Stuff for socket reporting
import pickle
# REMOVE LATER from datetime import datetime
# The module needs logging, but handlers, etc. are controlled by the parent
import logging
logger = logging.getLogger(__name__)
# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
__author__ = 'Cortney T. Buffington, N0MJS'
__copyright__ = 'Copyright (c) 2016-2018 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__ = 'GNU GPLv3'
__maintainer__ = 'Cort Buffington, N0MJS'
__email__ = 'n0mjs@me.com'
# Module gobal varaibles
# Timed loop used for reporting HBP status
#
# REPORT BASED ON THE TYPE SELECTED IN THE MAIN CONFIG FILE
def config_reports(_config, _factory):
if True: #_config['REPORTS']['REPORT']:
def reporting_loop(logger, _server):
logger.debug('(REPORT) Periodic reporting loop started')
_server.send_config()
_server.send_bridge()
logger.info('(REPORT) HBlink TCP reporting server configured')
report_server = _factory(_config)
report_server.clients = []
reactor.listenTCP(_config['REPORTS']['REPORT_PORT'], report_server)
reporting = task.LoopingCall(reporting_loop, logger, report_server)
reporting.start(_config['REPORTS']['REPORT_INTERVAL'])
return report_server
# 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.
def make_bridges(_rules):
try:
bridge_file = import_module(_rules)
logger.info('(ROUTER) Routing bridges file found and bridges imported')
except ImportError:
sys.exit('(ROUTER) TERMINATING: Routing bridges 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.
for _bridge in bridge_file.BRIDGES:
for _system in bridge_file.BRIDGES[_bridge]:
if _system['SYSTEM'] not in CONFIG['SYSTEMS']:
sys.exit('ERROR: Conference bridges found for system not configured main configuration')
_system['TGID'] = bytes_3(_system['TGID'])
for i, e in enumerate(_system['ON']):
_system['ON'][i] = bytes_3(_system['ON'][i])
for i, e in enumerate(_system['OFF']):
_system['OFF'][i] = bytes_3(_system['OFF'][i])
_system['TIMEOUT'] = _system['TIMEOUT']*60
if _system['ACTIVE'] == True:
_system['TIMER'] = time() + _system['TIMEOUT']
else:
_system['TIMER'] = time()
return bridge_file.BRIDGES
# Run this every minute for rule timer updates
def rule_timer_loop():
logger.debug('(ROUTER) routerHBP Rule timer loop started')
_now = time()
for _bridge in BRIDGES:
for _system in BRIDGES[_bridge]:
if _system['TO_TYPE'] == 'ON':
if _system['ACTIVE'] == True:
if _system['TIMER'] < _now:
_system['ACTIVE'] = False
logger.info('(ROUTER) Conference Bridge TIMEOUT: DEACTIVATE System: %s, Bridge: %s, TS: %s, TGID: %s', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']))
else:
timeout_in = _system['TIMER'] - _now
logger.info('(ROUTER) Conference Bridge ACTIVE (ON timer running): System: %s Bridge: %s, TS: %s, TGID: %s, Timeout in: %ss,', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']), timeout_in)
elif _system['ACTIVE'] == False:
logger.debug('(ROUTER) Conference Bridge INACTIVE (no change): System: %s Bridge: %s, TS: %s, TGID: %s', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']))
elif _system['TO_TYPE'] == 'OFF':
if _system['ACTIVE'] == False:
if _system['TIMER'] < _now:
_system['ACTIVE'] = True
logger.info('(ROUTER) Conference Bridge TIMEOUT: ACTIVATE System: %s, Bridge: %s, TS: %s, TGID: %s', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']))
else:
timeout_in = _system['TIMER'] - _now
logger.info('(ROUTER) Conference Bridge INACTIVE (OFF timer running): System: %s Bridge: %s, TS: %s, TGID: %s, Timeout in: %ss,', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']), timeout_in)
elif _system['ACTIVE'] == True:
logger.debug('(ROUTER) Conference Bridge ACTIVE (no change): System: %s Bridge: %s, TS: %s, TGID: %s', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']))
else:
logger.debug('(ROUTER) Conference Bridge NO ACTION: System: %s, Bridge: %s, TS: %s, TGID: %s', _system['SYSTEM'], _bridge, _system['TS'], int_id(_system['TGID']))
if CONFIG['REPORTS']['REPORT']:
report_server.send_clients(b'bridge updated')
# run this every 10 seconds to trim orphaned stream ids
def stream_trimmer_loop():
logger.debug('(ROUTER) Trimming inactive stream IDs from system lists')
_now = time()
for system in systems:
# HBP systems, master and peer
if CONFIG['SYSTEMS'][system]['MODE'] != 'OPENBRIDGE':
for slot in range(1,3):
_slot = systems[system].STATUS[slot]
# RX slot check
if _slot['RX_TYPE'] != HBPF_SLT_VTERM and _slot['RX_TIME'] < _now - 5:
_slot['RX_TYPE'] = HBPF_SLT_VTERM
logger.info('(%s) *TIME OUT* RX STREAM ID: %s SUB: %s TGID %s, TS %s, Duration: %s', \
system, int_id(_slot['RX_STREAM_ID']), int_id(_slot['RX_RFS']), int_id(_slot['RX_TGID']), slot, _slot['RX_TIME'] - _slot['RX_START'])
if CONFIG['REPORTS']['REPORT']:
systems[system]._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(system, int_id(_slot['RX_STREAM_ID']), int_id(_slot['RX_PEER']), int_id(_slot['RX_RFS']), slot, int_id(_slot['RX_TGID']), _slot['RX_TIME'] - _slot['RX_START']).encode(encoding='utf-8', errors='ignore'))
# TX slot check
if _slot['TX_TYPE'] != HBPF_SLT_VTERM and _slot['TX_TIME'] < _now - 5:
_slot['TX_TYPE'] = HBPF_SLT_VTERM
logger.info('(%s) *TIME OUT* TX STREAM ID: %s SUB: %s TGID %s, TS %s, Duration: %s', \
system, int_id(_slot['TX_STREAM_ID']), int_id(_slot['TX_RFS']), int_id(_slot['TX_TGID']), slot, _slot['TX_TIME'] - _slot['TX_START'])
if CONFIG['REPORTS']['REPORT']:
systems[system]._report.send_bridgeEvent('GROUP VOICE,END,TX,{},{},{},{},{},{},{:.2f}'.format(system, int_id(_slot['TX_STREAM_ID']), int_id(_slot['TX_PEER']), int_id(_slot['TX_RFS']), slot, int_id(_slot['TX_TGID']), _slot['TX_TIME'] - _slot['TX_START']).encode(encoding='utf-8', errors='ignore'))
# OBP systems
# We can't delete items from a dicationry that's being iterated, so we have to make a temporarly list of entrys to remove later
if CONFIG['SYSTEMS'][system]['MODE'] == 'OPENBRIDGE':
remove_list = []
for stream_id in systems[system].STATUS:
if systems[system].STATUS[stream_id]['LAST'] < _now - 5:
remove_list.append(stream_id)
for stream_id in remove_list:
if stream_id in systems[system].STATUS:
_stream = systems[system].STATUS[stream_id]
_sysconfig = CONFIG['SYSTEMS'][system]
logger.info('(%s) *TIME OUT* STREAM ID: %s SUB: %s PEER: %s TGID: %s TS 1 Duration: %s', \
system, int_id(stream_id), get_alias(int_id(_stream['RFS']), subscriber_ids), get_alias(int_id(_sysconfig['NETWORK_ID']), peer_ids), get_alias(int_id(_stream['TGID']), talkgroup_ids), _stream['LAST'] - _stream['START'])
if CONFIG['REPORTS']['REPORT']:
systems[system]._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(system, int_id(stream_id), int_id(_sysconfig['NETWORK_ID']), int_id(_stream['RFS']), 1, int_id(_stream['TGID']), _stream['LAST'] - _stream['START']).encode(encoding='utf-8', errors='ignore'))
removed = systems[system].STATUS.pop(stream_id)
else:
logger.error('(%s) Attemped to remove OpenBridge Stream ID %s not in the Stream ID list: %s', system, int_id(stream_id), [id for id in systems[system].STATUS])
class routerOBP(OPENBRIDGE):
def __init__(self, _name, _config, _report):
OPENBRIDGE.__init__(self, _name, _config, _report)
self.STATUS = {}
def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data):
pkt_time = time()
dmrpkt = _data[20:53]
_bits = _data[15]
if _call_type == 'group':
# Is this a new call stream?
if (_stream_id not in self.STATUS):
# This is a new call stream
self.STATUS[_stream_id] = {
'START': pkt_time,
'CONTENTION':False,
'RFS': _rf_src,
'TGID': _dst_id,
}
# If we can, use the LC from the voice header as to keep all options intact
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
decoded = decode.voice_head_term(dmrpkt)
self.STATUS[_stream_id]['LC'] = decoded['LC']
# If we don't have a voice header then don't wait to decode the Embedded LC
# just make a new one from the HBP header. This is good enough, and it saves lots of time
else:
self.STATUS[_stream_id]['LC'] = LC_OPT + _dst_id + _rf_src
logger.info('(%s) *CALL START* STREAM ID: %s SUB: %s (%s) PEER: %s (%s) TGID %s (%s), TS %s', \
self._system, int_id(_stream_id), get_alias(_rf_src, subscriber_ids), int_id(_rf_src), get_alias(_peer_id, peer_ids), int_id(_peer_id), get_alias(_dst_id, talkgroup_ids), int_id(_dst_id), _slot)
if CONFIG['REPORTS']['REPORT']:
self._report.send_bridgeEvent('GROUP VOICE,START,RX,{},{},{},{},{},{}'.format(self._system, int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _slot, int_id(_dst_id)).encode(encoding='utf-8', errors='ignore'))
self.STATUS[_stream_id]['LAST'] = pkt_time
for _bridge in BRIDGES:
for _system in BRIDGES[_bridge]:
if (_system['SYSTEM'] == self._system and _system['TGID'] == _dst_id and _system['TS'] == _slot and _system['ACTIVE'] == True):
for _target in BRIDGES[_bridge]:
if (_target['SYSTEM'] != self._system) and (_target['ACTIVE']):
_target_status = systems[_target['SYSTEM']].STATUS
_target_system = self._CONFIG['SYSTEMS'][_target['SYSTEM']]
if _target_system['MODE'] == 'OPENBRIDGE':
# Is this a new call stream on the target?
if (_stream_id not in _target_status):
# This is a new call stream on the target
_target_status[_stream_id] = {
'START': pkt_time,
'CONTENTION':False,
'RFS': _rf_src,
'TGID': _dst_id,
}
# Generate LCs (full and EMB) for the TX stream
dst_lc = b''.join([self.STATUS[_stream_id]['LC'][0:3], _target['TGID'], _rf_src])
_target_status[_stream_id]['H_LC'] = bptc.encode_header_lc(dst_lc)
_target_status[_stream_id]['T_LC'] = bptc.encode_terminator_lc(dst_lc)
_target_status[_stream_id]['EMB_LC'] = bptc.encode_emblc(dst_lc)
logger.info('(%s) Conference Bridge: %s, Call Bridged to OBP System: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
# Record the time of this packet so we can later identify a stale stream
_target_status[_stream_id]['LAST'] = pkt_time
# Clear the TS bit -- all OpenBridge streams are effectively on TS1
_tmp_bits = _bits & ~(1 << 7)
# Assemble transmit HBP packet header
_tmp_data = b''.join([_data[:8], _target['TGID'], _data[11:15], _tmp_bits.to_bytes(1, 'big'), _data[16:20]])
# MUST TEST FOR NEW STREAM AND IF SO, RE-WRITE THE LC FOR THE TARGET
# MUST RE-WRITE DESTINATION TGID IF DIFFERENT
# if _dst_id != rule['DST_GROUP']:
dmrbits = bitarray(endian='big')
dmrbits.frombytes(dmrpkt)
# Create a voice header packet (FULL LC)
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
dmrbits = _target_status[_stream_id]['H_LC'][0:98] + dmrbits[98:166] + _target_status[_stream_id]['H_LC'][98:197]
# Create a voice terminator packet (FULL LC)
elif _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VTERM:
dmrbits = _target_status[_stream_id]['T_LC'][0:98] + dmrbits[98:166] + _target_status[_stream_id]['T_LC'][98:197]
# Create a Burst B-E packet (Embedded LC)
elif _dtype_vseq in [1,2,3,4]:
dmrbits = dmrbits[0:116] + _target_status[_stream_id]['EMB_LC'][_dtype_vseq] + dmrbits[148:264]
dmrpkt = dmrbits.tobytes()
_tmp_data = b''.join([_tmp_data, dmrpkt])
else:
# BEGIN CONTENTION HANDLING
#
# The rules for each of the 4 "ifs" below are listed here for readability. The Frame To Send is:
# From a different group than last RX from this HBSystem, but it has been less than Group Hangtime
# From a different group than last TX to this HBSystem, but it has been less than Group Hangtime
# From the same group as the last RX from this HBSystem, but from a different subscriber, and it has been less than stream timeout
# From the same group as the last TX to this HBSystem, but from a different subscriber, and it has been less than stream timeout
# The "continue" at the end of each means the next iteration of the for loop that tests for matching rules
#
if ((_target['TGID'] != _target_status[_target['TS']]['RX_TGID']) and ((pkt_time - _target_status[_target['TS']]['RX_TIME']) < _target_system['GROUP_HANGTIME'])):
if self.STATUS[_stream_id]['CONTENTION'] == False:
self.STATUS[_stream_id]['CONTENTION'] = True
logger.info('(%s) Call not routed to TGID %s, target active or in group hangtime: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['RX_TGID']))
continue
if ((_target['TGID'] != _target_status[_target['TS']]['TX_TGID']) and ((pkt_time - _target_status[_target['TS']]['TX_TIME']) < _target_system['GROUP_HANGTIME'])):
if self.STATUS[_stream_id]['CONTENTION'] == False:
self.STATUS[_stream_id]['CONTENTION'] = True
logger.info('(%s) Call not routed to TGID%s, target in group hangtime: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['TX_TGID']))
continue
if (_target['TGID'] == _target_status[_target['TS']]['RX_TGID']) and ((pkt_time - _target_status[_target['TS']]['RX_TIME']) < STREAM_TO):
if self.STATUS[_stream_id]['CONTENTION'] == False:
self.STATUS[_stream_id]['CONTENTION'] = True
logger.info('(%s) Call not routed to TGID%s, matching call already active on target: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['RX_TGID']))
continue
if (_target['TGID'] == _target_status[_target['TS']]['TX_TGID']) and (_rf_src != _target_status[_target['TS']]['TX_RFS']) and ((pkt_time - _target_status[_target['TS']]['TX_TIME']) < STREAM_TO):
if self.STATUS[_stream_id]['CONTENTION'] == False:
self.STATUS[_stream_id]['CONTENTION'] = True
logger.info('(%s) Call not routed for subscriber %s, call route in progress on target: HBSystem: %s, TS: %s, TGID: %s, SUB: %s', self._system, int_id(_rf_src), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['TX_TGID']), int_id(_target_status[_target['TS']]['TX_RFS']))
continue
# Is this a new call stream?
if (_target_status[_target['TS']]['TX_STREAM_ID'] != _stream_id):
# Record the DST TGID and Stream ID
_target_status[_target['TS']]['TX_START'] = pkt_time
_target_status[_target['TS']]['TX_TGID'] = _target['TGID']
_target_status[_target['TS']]['TX_STREAM_ID'] = _stream_id
_target_status[_target['TS']]['TX_RFS'] = _rf_src
_target_status[_target['TS']]['TX_PEER'] = _peer_id
# Generate LCs (full and EMB) for the TX stream
dst_lc = b''.join([self.STATUS[_stream_id]['LC'][0:3], _target['TGID'], _rf_src])
_target_status[_target['TS']]['TX_H_LC'] = bptc.encode_header_lc(dst_lc)
_target_status[_target['TS']]['TX_T_LC'] = bptc.encode_terminator_lc(dst_lc)
_target_status[_target['TS']]['TX_EMB_LC'] = bptc.encode_emblc(dst_lc)
logger.debug('(%s) Generating TX FULL and EMB LCs for HomeBrew destination: System: %s, TS: %s, TGID: %s', self._system, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
logger.info('(%s) Conference Bridge: %s, Call Bridged to HBP System: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
if CONFIG['REPORTS']['REPORT']:
systems[_target['SYSTEM']]._report.send_bridgeEvent('GROUP VOICE,START,TX,{},{},{},{},{},{}'.format(_target['SYSTEM'], int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _target['TS'], int_id(_target['TGID'])).encode(encoding='utf-8', errors='ignore'))
# Set other values for the contention handler to test next time there is a frame to forward
_target_status[_target['TS']]['TX_TIME'] = pkt_time
_target_status[_target['TS']]['TX_TYPE'] = _dtype_vseq
# Handle any necessary re-writes for the destination
if _system['TS'] != _target['TS']:
_tmp_bits = _bits ^ 1 << 7
else:
_tmp_bits = _bits
# Assemble transmit HBP packet header
_tmp_data = b''.join([_data[:8], _target['TGID'], _data[11:15], _tmp_bits.to_bytes(1, 'big'), _data[16:20]])
# MUST TEST FOR NEW STREAM AND IF SO, RE-WRITE THE LC FOR THE TARGET
# MUST RE-WRITE DESTINATION TGID IF DIFFERENT
# if _dst_id != rule['DST_GROUP']:
dmrbits = bitarray(endian='big')
dmrbits.frombytes(dmrpkt)
# Create a voice header packet (FULL LC)
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
dmrbits = _target_status[_target['TS']]['TX_H_LC'][0:98] + dmrbits[98:166] + _target_status[_target['TS']]['TX_H_LC'][98:197]
# Create a voice terminator packet (FULL LC)
elif _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VTERM:
dmrbits = _target_status[_target['TS']]['TX_T_LC'][0:98] + dmrbits[98:166] + _target_status[_target['TS']]['TX_T_LC'][98:197]
if CONFIG['REPORTS']['REPORT']:
systems[_target['SYSTEM']]._report.send_bridgeEvent('GROUP VOICE,END,TX,{},{},{},{},{},{},{:.2f}'.format(_target['SYSTEM'], int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _target['TS'], int_id(_target['TGID']), 1).encode(encoding='utf-8', errors='ignore'))
# Create a Burst B-E packet (Embedded LC)
elif _dtype_vseq in [1,2,3,4]:
dmrbits = dmrbits[0:116] + _target_status[_target['TS']]['TX_EMB_LC'][_dtype_vseq] + dmrbits[148:264]
dmrpkt = dmrbits.tobytes()
_tmp_data = b''.join([_tmp_data, dmrpkt, b'\x00\x00']) # Add two bytes of nothing since OBP doesn't include BER & RSSI bytes #_data[53:55]
# Transmit the packet to the destination system
systems[_target['SYSTEM']].send_system(_tmp_data)
#logger.debug('(%s) Packet routed by bridge: %s to system: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
# Final actions - Is this a voice terminator?
if (_frame_type == HBPF_DATA_SYNC) and (_dtype_vseq == HBPF_SLT_VTERM):
call_duration = pkt_time - self.STATUS[_stream_id]['START']
logger.info('(%s) *CALL END* STREAM ID: %s SUB: %s (%s) PEER: %s (%s) TGID %s (%s), TS %s, Duration: %s', \
self._system, int_id(_stream_id), get_alias(_rf_src, subscriber_ids), int_id(_rf_src), get_alias(_peer_id, peer_ids), int_id(_peer_id), get_alias(_dst_id, talkgroup_ids), int_id(_dst_id), _slot, call_duration)
if CONFIG['REPORTS']['REPORT']:
self._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(self._system, int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _slot, int_id(_dst_id), call_duration).encode(encoding='utf-8', errors='ignore'))
removed = self.STATUS.pop(_stream_id)
logger.debug('(%s) OpenBridge sourced call stream end, remove terminated Stream ID: %s', self._system, int_id(_stream_id))
if not removed:
selflogger.error('(%s) *CALL END* STREAM ID: %s NOT IN LIST -- THIS IS A REAL PROBLEM', self._system, int_id(_stream_id))
class routerHBP(HBSYSTEM):
def __init__(self, _name, _config, _report):
HBSYSTEM.__init__(self, _name, _config, _report)
# Status information for the system, TS1 & TS2
# 1 & 2 are "timeslot"
# In TX_EMB_LC, 2-5 are burst B-E
self.STATUS = {
1: {
'RX_START': time(),
'TX_START': time(),
'RX_SEQ': '\x00',
'RX_RFS': '\x00',
'TX_RFS': '\x00',
'RX_PEER': '\x00',
'TX_PEER': '\x00',
'RX_STREAM_ID': '\x00',
'TX_STREAM_ID': '\x00',
'RX_TGID': '\x00\x00\x00',
'TX_TGID': '\x00\x00\x00',
'RX_TIME': time(),
'TX_TIME': time(),
'RX_TYPE': HBPF_SLT_VTERM,
'TX_TYPE': HBPF_SLT_VTERM,
'RX_LC': '\x00',
'TX_H_LC': '\x00',
'TX_T_LC': '\x00',
'TX_EMB_LC': {
1: '\x00',
2: '\x00',
3: '\x00',
4: '\x00',
}
},
2: {
'RX_START': time(),
'TX_START': time(),
'RX_SEQ': '\x00',
'RX_RFS': '\x00',
'TX_RFS': '\x00',
'RX_PEER': '\x00',
'TX_PEER': '\x00',
'RX_STREAM_ID': '\x00',
'TX_STREAM_ID': '\x00',
'RX_TGID': '\x00\x00\x00',
'TX_TGID': '\x00\x00\x00',
'RX_TIME': time(),
'TX_TIME': time(),
'RX_TYPE': HBPF_SLT_VTERM,
'TX_TYPE': HBPF_SLT_VTERM,
'RX_LC': '\x00',
'TX_H_LC': '\x00',
'TX_T_LC': '\x00',
'TX_EMB_LC': {
1: '\x00',
2: '\x00',
3: '\x00',
4: '\x00',
}
}
}
def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data):
pkt_time = time()
dmrpkt = _data[20:53]
_bits = _data[15]
if _call_type == 'group':
# Is this a new call stream?
if (_stream_id != self.STATUS[_slot]['RX_STREAM_ID']):
if (self.STATUS[_slot]['RX_TYPE'] != HBPF_SLT_VTERM) and (pkt_time < (self.STATUS[_slot]['RX_TIME'] + STREAM_TO)) and (_rf_src != self.STATUS[_slot]['RX_RFS']):
logger.warning('(%s) Packet received with STREAM ID: %s <FROM> SUB: %s PEER: %s <TO> TGID %s, SLOT %s collided with existing call', self._system, int_id(_stream_id), int_id(_rf_src), int_id(_peer_id), int_id(_dst_id), _slot)
return
# This is a new call stream
self.STATUS[_slot]['RX_START'] = pkt_time
logger.info('(%s) *CALL START* STREAM ID: %s SUB: %s (%s) PEER: %s (%s) TGID %s (%s), TS %s', \
self._system, int_id(_stream_id), get_alias(_rf_src, subscriber_ids), int_id(_rf_src), get_alias(_peer_id, peer_ids), int_id(_peer_id), get_alias(_dst_id, talkgroup_ids), int_id(_dst_id), _slot)
if CONFIG['REPORTS']['REPORT']:
self._report.send_bridgeEvent('GROUP VOICE,START,RX,{},{},{},{},{},{}'.format(self._system, int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _slot, int_id(_dst_id)).encode(encoding='utf-8', errors='ignore'))
# If we can, use the LC from the voice header as to keep all options intact
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
decoded = decode.voice_head_term(dmrpkt)
self.STATUS[_slot]['RX_LC'] = decoded['LC']
# If we don't have a voice header then don't wait to decode it from the Embedded LC
# just make a new one from the HBP header. This is good enough, and it saves lots of time
else:
self.STATUS[_slot]['RX_LC'] = LC_OPT + _dst_id + _rf_src
for _bridge in BRIDGES:
for _system in BRIDGES[_bridge]:
if (_system['SYSTEM'] == self._system and _system['TGID'] == _dst_id and _system['TS'] == _slot and _system['ACTIVE'] == True):
for _target in BRIDGES[_bridge]:
if _target['SYSTEM'] != self._system:
if _target['ACTIVE']:
_target_status = systems[_target['SYSTEM']].STATUS
_target_system = self._CONFIG['SYSTEMS'][_target['SYSTEM']]
if _target_system['MODE'] == 'OPENBRIDGE':
# Is this a new call stream on the target?
if (_stream_id not in _target_status):
# This is a new call stream on the target
_target_status[_stream_id] = {
'START': pkt_time,
'CONTENTION':False,
'RFS': _rf_src,
'TGID': _dst_id,
}
# Generate LCs (full and EMB) for the TX stream
dst_lc = b''.join([self.STATUS[_slot]['RX_LC'][0:3], _target['TGID'], _rf_src])
_target_status[_stream_id]['H_LC'] = bptc.encode_header_lc(dst_lc)
_target_status[_stream_id]['T_LC'] = bptc.encode_terminator_lc(dst_lc)
_target_status[_stream_id]['EMB_LC'] = bptc.encode_emblc(dst_lc)
logger.info('(%s) Conference Bridge: %s, Call Bridged to OBP System: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
# Record the time of this packet so we can later identify a stale stream
_target_status[_stream_id]['LAST'] = pkt_time
# Clear the TS bit -- all OpenBridge streams are effectively on TS1
_tmp_bits = _bits & ~(1 << 7)
# Assemble transmit HBP packet header
_tmp_data = b''.join([_data[:8], _target['TGID'], _data[11:15], _tmp_bits.to_bytes(1, 'big'), _data[16:20]])
# MUST TEST FOR NEW STREAM AND IF SO, RE-WRITE THE LC FOR THE TARGET
# MUST RE-WRITE DESTINATION TGID IF DIFFERENT
# if _dst_id != rule['DST_GROUP']:
dmrbits = bitarray(endian='big')
dmrbits.frombytes(dmrpkt)
# Create a voice header packet (FULL LC)
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
dmrbits = _target_status[_stream_id]['H_LC'][0:98] + dmrbits[98:166] + _target_status[_stream_id]['H_LC'][98:197]
# Create a voice terminator packet (FULL LC)
elif _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VTERM:
dmrbits = _target_status[_stream_id]['T_LC'][0:98] + dmrbits[98:166] + _target_status[_stream_id]['T_LC'][98:197]
# Create a Burst B-E packet (Embedded LC)
elif _dtype_vseq in [1,2,3,4]:
dmrbits = dmrbits[0:116] + _target_status[_stream_id]['EMB_LC'][_dtype_vseq] + dmrbits[148:264]
dmrpkt = dmrbits.tobytes()
_tmp_data = b''.join([_tmp_data, dmrpkt])
else:
# BEGIN STANDARD CONTENTION HANDLING
#
# The rules for each of the 4 "ifs" below are listed here for readability. The Frame To Send is:
# From a different group than last RX from this HBSystem, but it has been less than Group Hangtime
# From a different group than last TX to this HBSystem, but it has been less than Group Hangtime
# From the same group as the last RX from this HBSystem, but from a different subscriber, and it has been less than stream timeout
# From the same group as the last TX to this HBSystem, but from a different subscriber, and it has been less than stream timeout
# The "continue" at the end of each means the next iteration of the for loop that tests for matching rules
#
if ((_target['TGID'] != _target_status[_target['TS']]['RX_TGID']) and ((pkt_time - _target_status[_target['TS']]['RX_TIME']) < _target_system['GROUP_HANGTIME'])):
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD and self.STATUS[_slot]['RX_STREAM_ID'] != _seq:
logger.info('(%s) Call not routed to TGID %s, target active or in group hangtime: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['RX_TGID']))
continue
if ((_target['TGID'] != _target_status[_target['TS']]['TX_TGID']) and ((pkt_time - _target_status[_target['TS']]['TX_TIME']) < _target_system['GROUP_HANGTIME'])):
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD and self.STATUS[_slot]['RX_STREAM_ID'] != _seq:
logger.info('(%s) Call not routed to TGID%s, target in group hangtime: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['TX_TGID']))
continue
if (_target['TGID'] == _target_status[_target['TS']]['RX_TGID']) and ((pkt_time - _target_status[_target['TS']]['RX_TIME']) < STREAM_TO):
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD and self.STATUS[_slot]['RX_STREAM_ID'] != _seq:
logger.info('(%s) Call not routed to TGID%s, matching call already active on target: HBSystem: %s, TS: %s, TGID: %s', self._system, int_id(_target['TGID']), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['RX_TGID']))
continue
if (_target['TGID'] == _target_status[_target['TS']]['TX_TGID']) and (_rf_src != _target_status[_target['TS']]['TX_RFS']) and ((pkt_time - _target_status[_target['TS']]['TX_TIME']) < STREAM_TO):
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD and self.STATUS[_slot]['RX_STREAM_ID'] != _seq:
logger.info('(%s) Call not routed for subscriber %s, call route in progress on target: HBSystem: %s, TS: %s, TGID: %s, SUB: %s', self._system, int_id(_rf_src), _target['SYSTEM'], _target['TS'], int_id(_target_status[_target['TS']]['TX_TGID']), int_id(_target_status[_target['TS']]['TX_RFS']))
continue
# Is this a new call stream?
if (_stream_id != self.STATUS[_slot]['RX_STREAM_ID']):
# Record the DST TGID and Stream ID
_target_status[_target['TS']]['TX_START'] = pkt_time
_target_status[_target['TS']]['TX_TGID'] = _target['TGID']
_target_status[_target['TS']]['TX_STREAM_ID'] = _stream_id
_target_status[_target['TS']]['TX_RFS'] = _rf_src
_target_status[_target['TS']]['TX_PEER'] = _peer_id
# Generate LCs (full and EMB) for the TX stream
dst_lc = self.STATUS[_slot]['RX_LC'][0:3] + _target['TGID'] + _rf_src
_target_status[_target['TS']]['TX_H_LC'] = bptc.encode_header_lc(dst_lc)
_target_status[_target['TS']]['TX_T_LC'] = bptc.encode_terminator_lc(dst_lc)
_target_status[_target['TS']]['TX_EMB_LC'] = bptc.encode_emblc(dst_lc)
logger.debug('(%s) Generating TX FULL and EMB LCs for HomeBrew destination: System: %s, TS: %s, TGID: %s', self._system, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
logger.info('(%s) Conference Bridge: %s, Call Bridged to HBP System: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
if CONFIG['REPORTS']['REPORT']:
systems[_target['SYSTEM']]._report.send_bridgeEvent('GROUP VOICE,START,TX,{},{},{},{},{},{}'.format(_target['SYSTEM'], int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _target['TS'], int_id(_target['TGID'])).encode(encoding='utf-8', errors='ignore'))
# Set other values for the contention handler to test next time there is a frame to forward
_target_status[_target['TS']]['TX_TIME'] = pkt_time
_target_status[_target['TS']]['TX_TYPE'] = _dtype_vseq
# Handle any necessary re-writes for the destination
if _system['TS'] != _target['TS']:
_tmp_bits = _bits ^ 1 << 7
else:
_tmp_bits = _bits
# Assemble transmit HBP packet header
_tmp_data = b''.join([_data[:8], _target['TGID'], _data[11:15], _tmp_bits.to_bytes(1, 'big'), _data[16:20]])
# MUST TEST FOR NEW STREAM AND IF SO, RE-WRITE THE LC FOR THE TARGET
# MUST RE-WRITE DESTINATION TGID IF DIFFERENT
# if _dst_id != rule['DST_GROUP']:
dmrbits = bitarray(endian='big')
dmrbits.frombytes(dmrpkt)
# Create a voice header packet (FULL LC)
if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
dmrbits = _target_status[_target['TS']]['TX_H_LC'][0:98] + dmrbits[98:166] + _target_status[_target['TS']]['TX_H_LC'][98:197]
# Create a voice terminator packet (FULL LC)
elif _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VTERM:
dmrbits = _target_status[_target['TS']]['TX_T_LC'][0:98] + dmrbits[98:166] + _target_status[_target['TS']]['TX_T_LC'][98:197]
if CONFIG['REPORTS']['REPORT']:
systems[_target['SYSTEM']]._report.send_bridgeEvent('GROUP VOICE,END,TX,{},{},{},{},{},{},{:.2f}'.format(_target['SYSTEM'], int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _target['TS'], int_id(_target['TGID']), 1).encode(encoding='utf-8', errors='ignore'))
# Create a Burst B-E packet (Embedded LC)
elif _dtype_vseq in [1,2,3,4]:
dmrbits = dmrbits[0:116] + _target_status[_target['TS']]['TX_EMB_LC'][_dtype_vseq] + dmrbits[148:264]
dmrpkt = dmrbits.tobytes()
_tmp_data = b''.join([_tmp_data, dmrpkt, _data[53:55]])
# Transmit the packet to the destination system
systems[_target['SYSTEM']].send_system(_tmp_data)
#logger.debug('(%s) Packet routed by bridge: %s to system: %s TS: %s, TGID: %s', self._system, _bridge, _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
# Final actions - Is this a voice terminator?
if (_frame_type == HBPF_DATA_SYNC) and (_dtype_vseq == HBPF_SLT_VTERM) and (self.STATUS[_slot]['RX_TYPE'] != HBPF_SLT_VTERM):
call_duration = pkt_time - self.STATUS[_slot]['RX_START']
logger.info('(%s) *CALL END* STREAM ID: %s SUB: %s (%s) PEER: %s (%s) TGID %s (%s), TS %s, Duration: %s', \
self._system, int_id(_stream_id), get_alias(_rf_src, subscriber_ids), int_id(_rf_src), get_alias(_peer_id, peer_ids), int_id(_peer_id), get_alias(_dst_id, talkgroup_ids), int_id(_dst_id), _slot, call_duration)
if CONFIG['REPORTS']['REPORT']:
self._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(self._system, int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _slot, int_id(_dst_id), call_duration).encode(encoding='utf-8', errors='ignore'))
#
# Begin in-band signalling for call end. This has nothign to do with routing traffic directly.
#
# Iterate the rules dictionary
for _bridge in BRIDGES:
for _system in BRIDGES[_bridge]:
if _system['SYSTEM'] == self._system:
# TGID matches a rule source, reset its timer
if _slot == _system['TS'] and _dst_id == _system['TGID'] and ((_system['TO_TYPE'] == 'ON' and (_system['ACTIVE'] == True)) or (_system['TO_TYPE'] == 'OFF' and _system['ACTIVE'] == False)):
_system['TIMER'] = pkt_time + _system['TIMEOUT']
logger.info('(%s) Transmission match for Bridge: %s. Reset timeout to %s', self._system, _bridge, _system['TIMER'])
# TGID matches an ACTIVATION trigger
if (_dst_id in _system['ON'] or _dst_id in _system['RESET']) and _slot == _system['TS']:
# Set the matching rule as ACTIVE
if _dst_id in _system['ON']:
if _system['ACTIVE'] == False:
_system['ACTIVE'] = True
_system['TIMER'] = pkt_time + _system['TIMEOUT']
logger.info('(%s) Bridge: %s, connection changed to state: %s', self._system, _bridge, _system['ACTIVE'])
# Cancel the timer if we've enabled an "OFF" type timeout
if _system['TO_TYPE'] == 'OFF':
_system['TIMER'] = pkt_time
logger.info('(%s) Bridge: %s set to "OFF" with an on timer rule: timeout timer cancelled', self._system, _bridge)
# Reset the timer for the rule
if _system['ACTIVE'] == True and _system['TO_TYPE'] == 'ON':
_system['TIMER'] = pkt_time + _system['TIMEOUT']
logger.info('(%s) Bridge: %s, timeout timer reset to: %s', self._system, _bridge, _system['TIMER'] - pkt_time)
# TGID matches an DE-ACTIVATION trigger
if (_dst_id in _system['OFF'] or _dst_id in _system['RESET']) and _slot == _system['TS']:
# Set the matching rule as ACTIVE
if _dst_id in _system['OFF']:
if _system['ACTIVE'] == True:
_system['ACTIVE'] = False
logger.info('(%s) Bridge: %s, connection changed to state: %s', self._system, _bridge, _system['ACTIVE'])
# Cancel the timer if we've enabled an "ON" type timeout
if _system['TO_TYPE'] == 'ON':
_system['TIMER'] = pkt_time
logger.info('(%s) Bridge: %s set to ON with and "OFF" timer rule: timeout timer cancelled', self._system, _bridge)
# Reset the timer for the rule
if _system['ACTIVE'] == False and _system['TO_TYPE'] == 'OFF':
_system['TIMER'] = pkt_time + _system['TIMEOUT']
logger.info('(%s) Bridge: %s, timeout timer reset to: %s', self._system, _bridge, _system['TIMER'] - pkt_time)
# Cancel the timer if we've enabled an "ON" type timeout
if _system['ACTIVE'] == True and _system['TO_TYPE'] == 'ON' and _dst_group in _system['OFF']:
_system['TIMER'] = pkt_time
logger.info('(%s) Bridge: %s set to ON with and "OFF" timer rule: timeout timer cancelled', self._system, _bridge)
#
# END IN-BAND SIGNALLING
#
# Mark status variables for use later
self.STATUS[_slot]['RX_PEER'] = _peer_id
self.STATUS[_slot]['RX_SEQ'] = _seq
self.STATUS[_slot]['RX_RFS'] = _rf_src
self.STATUS[_slot]['RX_TYPE'] = _dtype_vseq
self.STATUS[_slot]['RX_TGID'] = _dst_id
self.STATUS[_slot]['RX_TIME'] = pkt_time
self.STATUS[_slot]['RX_STREAM_ID'] = _stream_id
#
# Socket-based reporting section
#
class bridgeReportFactory(reportFactory):
def send_bridge(self):
serialized = pickle.dumps(BRIDGES, protocol=2) #.decode("utf-8", errors='ignore')
self.send_clients(REPORT_OPCODES['BRIDGE_SND']+serialized)
def send_bridgeEvent(self, _data):
if isinstance(_data, str):
print('bridge event was a string')
#_data = _data.decode('utf-8', error='ignore')
self.send_clients(REPORT_OPCODES['BRDG_EVENT']+_data)
#************************************************
# MAIN PROGRAM LOOP STARTS HERE
#************************************************
if __name__ == '__main__':
import argparse
import sys
import os
import signal
# 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='CONFIG_FILE', help='/full/path/to/config.file (usually hblink.cfg)')
parser.add_argument('-l', '--logging', action='store', dest='LOG_LEVEL', help='Override config file logging level.')
cli_args = parser.parse_args()
# Ensure we have a path for the config file, if one wasn't specified, then use the default (top of file)
if not cli_args.CONFIG_FILE:
cli_args.CONFIG_FILE = os.path.dirname(os.path.abspath(__file__))+'/hblink.cfg'
# Call the external routine to build the configuration dictionary
CONFIG = config.build_config(cli_args.CONFIG_FILE)
# Start the system logger
if cli_args.LOG_LEVEL:
CONFIG['LOGGER']['LOG_LEVEL'] = cli_args.LOG_LEVEL
logger = log.config_logging(CONFIG['LOGGER'])
logger.info('\n\nCopyright (c) 2013, 2014, 2015, 2016, 2018\n\tThe Founding Members of the K0USY Group. All rights reserved.\n')
logger.debug('(GLOBAL) Logging system started, anything from here on gets logged')
# Set up the signal handler
def sig_handler(_signal, _frame):
logger.info('(GLOBAL) SHUTDOWN: CONFBRIDGE IS TERMINATING WITH SIGNAL %s', str(_signal))
hblink_handler(_signal, _frame)
logger.info('(GLOBAL) SHUTDOWN: ALL SYSTEM HANDLERS EXECUTED - STOPPING REACTOR')
reactor.stop()
# Set signal handers so that we can gracefully exit if need be
for sig in [signal.SIGINT, signal.SIGTERM]:
signal.signal(sig, sig_handler)
# Create the name-number mapping dictionaries
peer_ids, subscriber_ids, talkgroup_ids = mk_aliases(CONFIG)
# Build the routing rules file
BRIDGES = make_bridges('rules')
# INITIALIZE THE REPORTING LOOP
if CONFIG['REPORTS']['REPORT']:
report_server = config_reports(CONFIG, bridgereportFactory)
else:
report_server = None
logger.info('(REPORT) TCP Socket reporting not configured')
# HBlink instance creation
logger.info('(GLOBAL) HBlink \'bridge.py\' -- SYSTEM STARTING...')
for system in CONFIG['SYSTEMS']:
if CONFIG['SYSTEMS'][system]['ENABLED']:
if CONFIG['SYSTEMS'][system]['MODE'] == 'OPENBRIDGE':
systems[system] = routerOBP(system, CONFIG, report_server)
else:
systems[system] = routerHBP(system, CONFIG, report_server)
reactor.listenUDP(CONFIG['SYSTEMS'][system]['PORT'], systems[system], interface=CONFIG['SYSTEMS'][system]['IP'])
logger.debug('(GLOBAL) %s instance created: %s, %s', CONFIG['SYSTEMS'][system]['MODE'], system, systems[system])
def loopingErrHandle(failure):
logger.error('(GLOBAL) STOPPING REACTOR TO AVOID MEMORY LEAK: Unhandled error in timed loop.\n %s', failure)
reactor.stop()
# Initialize the rule timer -- this if for user activated stuff
rule_timer_task = task.LoopingCall(rule_timer_loop)
rule_timer = rule_timer_task.start(60)
rule_timer.addErrback(loopingErrHandle)
# Initialize the stream trimmer
stream_trimmer_task = task.LoopingCall(stream_trimmer_loop)
stream_trimmer = stream_trimmer_task.start(5)
stream_trimmer.addErrback(loopingErrHandle)
reactor.run()
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