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DMRlink/IPSC_Bridge.py

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#!/usr/bin/env python
#
###############################################################################
# Copyright (C) 2016 Cortney T. Buffington, N0MJS <n0mjs@me.com>
# and
# Copyright (C) 2017 Mike Zingman, N4IRR <Not.A.Chance@NoWhere.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 is a bridge application for IPSC networks. It knows how to export AMBE
# frames and metadata to an external program/network. It also knows how to import
# AMBE and metadata from an external network and send the DMR frames to IPSC networks.
###############################################################################
from __future__ import print_function
from twisted.internet import reactor
from binascii import b2a_hex as h
from bitstring import BitArray
import sys, socket, ConfigParser, thread, traceback
import cPickle as pickle
from dmrlink import IPSC, systems, config_reports, reportFactory
from dmr_utils.utils import int_id, hex_str_3, hex_str_4, get_alias, get_info
from time import time, sleep, clock, localtime, strftime
import csv
import struct
from random import randint
from dmr_utils import ambe_utils
from dmr_utils.ambe_bridge import AMBE_IPSC
__author__ = 'Cortney T. Buffington, N0MJS'
__copyright__ = 'Copyright (c) 2013 - 2016 Cortney T. Buffington, N0MJS and the K0USY Group'
__credits__ = 'Adam Fast, KC0YLK; Dave Kierzkowski, KD8EYF; Robert Garcia, N5QM; Steve Zingman, N4IRS; Mike Zingman, N4IRR'
__license__ = 'GNU GPLv3'
__maintainer__ = 'Cort Buffington, N0MJS'
__email__ = 'n0mjs@me.com'
__version__ = '20170620'
try:
from ipsc.ipsc_const import *
except ImportError:
sys.exit('IPSC constants file not found or invalid')
try:
from ipsc.ipsc_mask import *
except ImportError:
sys.exit('IPSC mask values file not found or invalid')
#
# ambeIPSC class,
#
class ambeIPSC(IPSC):
_gateway = "127.0.0.1" # IP address of app
_gateway_port = 31000 # Port Analog_Bridge is listening on for AMBE frames to decode
_ambeRxPort = 31003 # Port to listen on for AMBE frames to transmit to all peers
_busy_slots = [0,0,0] # Keep track of activity on each slot. Make sure app is polite
_currentNetwork = ""
cc = 1
###### DEBUGDEBUGDEBUG
#_d = None
###### DEBUGDEBUGDEBUG
def __init__(self, _name, _config, _logger, _report):
IPSC.__init__(self, _name, _config, _logger, _report)
#
# Define default values for operation. These will be overridden by the .cfg file if found
#
self._configFile=cli_args.BRIDGE_CONFIG_FILE
self._currentNetwork = str(_name)
self.readConfigFile(self._configFile, None, self._currentNetwork)
logger.info('DMRLink IPSC Bridge')
self.ipsc_ambe = AMBE_IPSC(self, _name, _config, _logger, self._ambeRxPort)
def get_globals(self):
return (subscriber_ids, talkgroup_ids, peer_ids)
def get_repeater_id(self, import_id):
return self._config['LOCAL']['RADIO_ID']
#
# Now read the configuration file and parse out the values we need
#
def defaultOption( self, config, sec, opt, defaultValue ):
try:
_value = config.get(sec, opt).split(None)[0] # Get the value from the named section
except ConfigParser.NoOptionError as e:
try:
_value = config.get('DEFAULTS', opt).split(None)[0] # Try the global DEFAULTS section
except ConfigParser.NoOptionError as e:
_value = defaultValue # Not found anywhere, use the default value
logger.info(opt + ' = ' + str(_value))
return _value
def readConfigFile(self, configFileName, sec, networkName='DEFAULTS'):
config = ConfigParser.ConfigParser()
try:
config.read(configFileName)
if sec == None:
sec = self.defaultOption(config, 'DEFAULTS', 'section', networkName)
if config.has_section(sec) == False:
logger.info('Section ' + sec + ' was not found, using DEFAULTS')
sec = 'DEFAULTS'
self._gateway = self.defaultOption(config, sec,'gateway', self._gateway)
self._gateway_port = int(self.defaultOption(config, sec,'toGatewayPort', self._gateway_port))
self._ambeRxPort = int(self.defaultOption(config, sec,'fromGatewayPort', self._ambeRxPort))
except ConfigParser.NoOptionError as e:
print('Using a default value:', e)
except:
traceback.print_exc()
sys.exit('Configuration file \''+configFileName+'\' is not a valid configuration file! Exiting...')
#************************************************
# CALLBACK FUNCTIONS FOR USER PACKET TYPES
#************************************************
#
def group_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
_tx_slot = self.ipsc_ambe.tx[_ts]
_payload_type = _data[30:31]
_seq = int_id(_data[20:22])
_tx_slot.frame_count += 1
if _payload_type == BURST_DATA_TYPE['VOICE_HEAD']:
_stream_id = int_id(_data[5:6]) # int8 looks like a sequence number for a packet
if (_stream_id != _tx_slot.stream_id):
self.ipsc_ambe.begin_call(_ts, _src_sub, _dst_sub, _peerid, self.cc, _seq, _stream_id)
_tx_slot.lastSeq = _seq
if _payload_type == BURST_DATA_TYPE['VOICE_TERM']:
self.ipsc_ambe.end_call(_tx_slot)
if (_payload_type == BURST_DATA_TYPE['SLOT1_VOICE']) or (_payload_type == BURST_DATA_TYPE['SLOT2_VOICE']):
_ambe_frames = BitArray('0x'+h(_data[33:52]))
_ambe_frame1 = _ambe_frames[0:49]
_ambe_frame2 = _ambe_frames[50:99]
_ambe_frame3 = _ambe_frames[100:149]
self.ipsc_ambe.export_voice(_tx_slot, _seq, _ambe_frame1.tobytes() + _ambe_frame2.tobytes() + _ambe_frame3.tobytes())
def private_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
print('private voice')
#************************************************
# Debug: print IPSC frame on console
#************************************************
def dumpIPSCFrame( self, _frame ):
_packettype = int_id(_frame[0:1]) # int8 GROUP_VOICE, PVT_VOICE, GROUP_DATA, PVT_DATA, CALL_MON_STATUS, CALL_MON_RPT, CALL_MON_NACK, XCMP_XNL, RPT_WAKE_UP, DE_REG_REQ
_peerid = int_id(_frame[1:5]) # int32 peer who is sending us a packet
_ipsc_seq = int_id(_frame[5:6]) # int8 looks like a sequence number for a packet
_src_sub = int_id(_frame[6:9]) # int32 Id of source
_dst_sub = int_id(_frame[9:12]) # int32 Id of destination
_call_type = int_id(_frame[12:13]) # int8 Priority Voice/Data
_call_ctrl_info = int_id(_frame[13:17]) # int32
_call_info = int_id(_frame[17:18]) # int8 Bits 6 and 7 defined as TS and END
# parse out the RTP values
_rtp_byte_1 = int_id(_frame[18:19]) # Call Ctrl Src
_rtp_byte_2 = int_id(_frame[19:20]) # Type
_rtp_seq = int_id(_frame[20:22]) # Call Seq No
_rtp_tmstmp = int_id(_frame[22:26]) # Timestamp
_rtp_ssid = int_id(_frame[26:30]) # Sync Src Id
_payload_type = _frame[30] # int8 VOICE_HEAD, VOICE_TERM, SLOT1_VOICE, SLOT2_VOICE
_ts = bool(_call_info & TS_CALL_MSK)
_end = bool(_call_info & END_MSK)
if _payload_type == BURST_DATA_TYPE['VOICE_HEAD']:
print('HEAD:', h(_frame))
if _payload_type == BURST_DATA_TYPE['VOICE_TERM']:
_ipsc_rssi_threshold_and_parity = int_id(_frame[31])
_ipsc_length_to_follow = int_id(_frame[32:34])
_ipsc_rssi_status = int_id(_frame[34])
_ipsc_slot_type_sync = int_id(_frame[35])
_ipsc_data_size = int_id(_frame[36:38])
_ipsc_data = _frame[38:38+(_ipsc_length_to_follow * 2)-4]
_ipsc_full_lc_byte1 = int_id(_frame[38])
_ipsc_full_lc_fid = int_id(_frame[39])
_ipsc_voice_pdu_service_options = int_id(_frame[40])
_ipsc_voice_pdu_dst = int_id(_frame[41:44])
_ipsc_voice_pdu_src = int_id(_frame[44:47])
print('{} {} {} {} {} {} {} {} {} {} {}'.format(_ipsc_rssi_threshold_and_parity,_ipsc_length_to_follow,_ipsc_rssi_status,_ipsc_slot_type_sync,_ipsc_data_size,h(_ipsc_data),_ipsc_full_lc_byte1,_ipsc_full_lc_fid,_ipsc_voice_pdu_service_options,_ipsc_voice_pdu_dst,_ipsc_voice_pdu_src))
print('TERM:', h(_frame))
if _payload_type == BURST_DATA_TYPE['SLOT1_VOICE']:
_rtp_len = _frame[31:32]
_ambe = _frame[33:52]
print('SLOT1:', h(_frame))
if _payload_type == BURST_DATA_TYPE['SLOT2_VOICE']:
_rtp_len = _frame[31:32]
_ambe = _frame[33:52]
print('SLOT2:', h(_frame))
print("pt={:02X} pid={} seq={:02X} src={} dst={} ct={:02X} uk={} ci={} rsq={}".format(_packettype, _peerid,_ipsc_seq, _src_sub,_dst_sub,_call_type,_call_ctrl_info,_call_info,_rtp_seq))
if __name__ == '__main__':
import argparse
import os
import sys
import signal
from dmr_utils.utils import try_download, mk_id_dict
from ipsc.dmrlink_log import config_logging
from ipsc.dmrlink_config import build_config
# 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.')
parser.add_argument('-b','--bridge_config', action='store', dest='BRIDGE_CONFIG_FILE', help='/full/path/to/bridgeconfig.cfg (default HB_Bridge.cfg)')
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.CFG_FILE:
cli_args.CFG_FILE = os.path.dirname(os.path.abspath(__file__))+'/dmrlink.cfg'
# Ensure we have a path for the bridge config file, if one wasn't specified, then use the default (top of file)
if not cli_args.BRIDGE_CONFIG_FILE:
cli_args.BRIDGE_CONFIG_FILE = os.path.dirname(os.path.abspath(__file__))+'/IPSC_Bridge.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 \'IPSC_Bridge.py\' (c) 2015 N0MJS & the K0USY Group - SYSTEM STARTING...')
logger.info('Version %s', __version__)
# ID ALIAS CREATION
# Download
if CONFIG['ALIASES']['TRY_DOWNLOAD'] == True:
# Try updating peer aliases file
result = try_download(CONFIG['ALIASES']['PATH'], CONFIG['ALIASES']['PEER_FILE'], CONFIG['ALIASES']['PEER_URL'], CONFIG['ALIASES']['STALE_TIME'])
logger.info(result)
# Try updating subscriber aliases file
result = try_download(CONFIG['ALIASES']['PATH'], CONFIG['ALIASES']['SUBSCRIBER_FILE'], CONFIG['ALIASES']['SUBSCRIBER_URL'], CONFIG['ALIASES']['STALE_TIME'])
logger.info(result)
# Make Dictionaries
peer_ids = mk_id_dict(CONFIG['ALIASES']['PATH'], CONFIG['ALIASES']['PEER_FILE'])
if peer_ids:
logger.info('ID ALIAS MAPPER: peer_ids dictionary is available')
subscriber_ids = mk_id_dict(CONFIG['ALIASES']['PATH'], CONFIG['ALIASES']['SUBSCRIBER_FILE'])
if subscriber_ids:
logger.info('ID ALIAS MAPPER: subscriber_ids dictionary is available')
talkgroup_ids = mk_id_dict(CONFIG['ALIASES']['PATH'], CONFIG['ALIASES']['TGID_FILE'])
if talkgroup_ids:
logger.info('ID ALIAS MAPPER: talkgroup_ids dictionary is available')
# Shut ourselves down gracefully with the IPSC peers.
def sig_handler(_signal, _frame):
logger.info('*** DMRLINK IS TERMINATING WITH SIGNAL %s ***', str(_signal))
for system in systems:
this_ipsc = systems[system]
logger.info('De-Registering from IPSC %s', system)
de_reg_req_pkt = this_ipsc.hashed_packet(this_ipsc._local['AUTH_KEY'], this_ipsc.DE_REG_REQ_PKT)
this_ipsc.send_to_ipsc(de_reg_req_pkt)
reactor.stop()
# Set signal handers so that we can gracefully exit if need be
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)
# INITIALIZE AN IPSC OBJECT (SELF SUSTAINING) FOR EACH CONFIGUED IPSC
for system in CONFIG['SYSTEMS']:
if CONFIG['SYSTEMS'][system]['LOCAL']['ENABLED']:
systems[system] = ambeIPSC(system, CONFIG, logger, report_server)
reactor.listenUDP(CONFIG['SYSTEMS'][system]['LOCAL']['PORT'], systems[system], interface=CONFIG['SYSTEMS'][system]['LOCAL']['IP'])
reactor.run()
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