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DMRlink/ambe_audio.py
Cort Buffington 49d7c1f484 Bug Fix - message_types to const 
import of the constants naming convention didn’t get changed when the
global naming change occurred.
2017-03-20 07:51:39 -05:00

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#!/usr/bin/env python
#
###############################################################################
# Copyright (C) 2016 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 is a sample applicaiton that dumps all raw AMBE+2 voice frame data
# It is useful for things like, decoding the audio stream with a DVSI dongle, etc.
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
from dmr_utils.utils import int_id, hex_str_3, hex_str_4, get_alias
from time import time, sleep, clock, localtime, strftime
import csv
import struct
from random import randint
__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'
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):
_configFile='ambe_audio.cfg' # Name of the config file to over-ride these default values
_debug = False # Debug output for each VOICE frame
_outToFile = False # Write each AMBE frame to a file called ambe.bin
_outToUDP = True # Send each AMBE frame to the _sock object (turn on/off DMRGateway operation)
#_gateway = "192.168.1.184"
_gateway = "127.0.0.1" # IP address of DMRGateway app
_gateway_port = 31000 # Port DMRGateway is listening on for AMBE frames to decode
_remote_control_port = 31002 # Port that ambe_audio is listening on for remote control commands
_ambeRxPort = 31003 # Port to listen on for AMBE frames to transmit to all peers
_gateway_dmr_id = 0 # id to use when transmitting from the gateway
_tg_filter = [2,3,13,3174,3777215,3100,9,9998,3112] #set this to the tg to monitor
_no_tg = -99 # Flag (const) that defines a value for "no tg is currently active"
_busy_slots = [0,0,0] # Keep track of activity on each slot. Make sure app is polite
_sock = -1; # Socket object to send AMBE to DMRGateway
lastPacketTimeout = 0 # Time of last packet. Used to trigger an artifical TERM if one was not seen
_transmitStartTime = 0 # Used for info on transmission duration
_start_seq = 0 # Used to maintain error statistics for a transmission
_packet_count = 0 # Used to maintain error statistics for a transmission
_seq = 0 # Transmit frame sequence number (auto-increments for each frame)
_f = None # File handle for debug AMBE binary output
_tx_tg = hex_str_3(9998) # Hard code the destination TG. This ensures traffic will not show up on DMR-MARC
_tx_ts = 2 # Time Slot 2
_currentNetwork = ""
_dmrgui = ''
###### DEBUGDEBUGDEBUG
#_d = None
###### DEBUGDEBUGDEBUG
def __init__(self, _name, _config, _logger):
IPSC.__init__(self, _name, _config, _logger)
self.CALL_DATA = []
#
# Define default values for operation. These will be overridden by the .cfg file if found
#
self._currentTG = self._no_tg
self._currentNetwork = str(_name)
self.readConfigFile(self._configFile, None, self._currentNetwork)
logger.info('DMRLink ambe server')
if self._gateway_dmr_id == 0:
sys.exit( "Error: gatewayDmrId must be set (greater than zero)" )
#
# Open output sincs
#
if self._outToFile == True:
self._f = open('ambe.bin', 'wb')
logger.info('Opening output file: ambe.bin')
if self._outToUDP == True:
self._sock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
logger.info('Send UDP frames to DMR gateway {}:{}'.format(self._gateway, self._gateway_port))
###### DEBUGDEBUGDEBUG
#self._d = open('recordData.bin', 'wb')
###### DEBUGDEBUGDEBUG
try:
thread.start_new_thread( self.remote_control, (self._remote_control_port, ) ) # Listen for remote control commands
thread.start_new_thread( self.launchUDP, (_name, ) ) # Package AMBE into IPSC frames and send to all peers
except:
traceback.print_exc()
logger.error( "Error: unable to start thread" )
# Utility function to convert bytes to string of hex values (for debug)
def ByteToHex( self, byteStr ):
return ''.join( [ "%02X " % ord(x) for x in byteStr ] ).strip()
#
# 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.error('Section ' + sec + ' was not found, using DEFAULTS')
sec = 'DEFAULTS'
self._debug = bool(self.defaultOption(config, sec,'debug', self._debug) == 'True')
self._outToFile = bool(self.defaultOption(config, sec,'outToFile', self._outToFile) == 'True')
self._outToUDP = bool(self.defaultOption(config, sec,'outToUDP', self._outToUDP) == 'True')
self._gateway = self.defaultOption(config, sec,'gateway', self._gateway)
self._gateway_port = int(self.defaultOption(config, sec,'toGatewayPort', self._gateway_port))
self._remote_control_port = int(self.defaultOption(config, sec,'remoteControlPort', self._remote_control_port))
self._ambeRxPort = int(self.defaultOption(config, sec,'fromGatewayPort', self._ambeRxPort))
self._gateway_dmr_id = int(self.defaultOption(config, sec, 'gatewayDmrId', self._gateway_dmr_id))
_tgs = self.defaultOption(config, sec,'tgFilter', str(self._tg_filter).strip('[]'))
self._tg_filter = map(int, _tgs.split(','))
self._tx_tg = hex_str_3(int(self.defaultOption(config, sec, 'txTg', int_id(self._tx_tg))))
self._tx_ts = int(self.defaultOption(config, sec, 'txTs', self._tx_ts))
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...')
def rewriteFrame( self, _frame, _newSlot, _newGroup, _newSouceID, _newPeerID ):
_peerid = _frame[1:5] # int32 peer who is sending us a packet
_src_sub = _frame[6:9] # int32 Id of source
_burst_data_type = _frame[30]
########################################################################
# re-Write the peer radio ID to that of this program
_frame = _frame.replace(_peerid, _newPeerID)
# re-Write the source subscriber ID to that of this program
_frame = _frame.replace(_src_sub, _newSouceID)
# Re-Write the destination Group ID
_frame = _frame.replace(_frame[9:12], _newGroup)
# Re-Write IPSC timeslot value
_call_info = int_id(_frame[17:18])
if _newSlot == 1:
_call_info &= ~(1 << 5)
elif _newSlot == 2:
_call_info |= 1 << 5
_call_info = chr(_call_info)
_frame = _frame[:17] + _call_info + _frame[18:]
_x = struct.pack("i", self._seq)
_frame = _frame[:20] + _x[1] + _x[0] + _frame[22:]
self._seq = self._seq + 1
# Re-Write DMR timeslot value
# Determine if the slot is present, so we can translate if need be
if _burst_data_type == BURST_DATA_TYPE['SLOT1_VOICE'] or _burst_data_type == BURST_DATA_TYPE['SLOT2_VOICE']:
# Re-Write timeslot if necessary...
if _newSlot == 1:
_burst_data_type = BURST_DATA_TYPE['SLOT1_VOICE']
elif _newSlot == 2:
_burst_data_type = BURST_DATA_TYPE['SLOT2_VOICE']
_frame = _frame[:30] + _burst_data_type + _frame[31:]
if (time() - self._busy_slots[_newSlot]) >= 0.10 : # slot is not busy so it is safe to transmit
# Send the packet to all peers in the target IPSC
self.send_to_ipsc(_frame)
else:
logger.info('Slot {} is busy, will not transmit packet from gateway'.format(_newSlot))
########################################################################
# Read a record from the captured IPSC file looking for a payload type that matches the filter
def readRecord(self, _file, _match_type):
_notEOF = True
# _file.seek(0)
while (_notEOF):
_data = ""
_bLen = _file.read(4)
if _bLen:
_len, = struct.unpack("i", _bLen)
if _len > 0:
_data = _file.read(_len)
_payload_type = _data[30]
if _payload_type == _match_type:
return _data
else:
_notEOF = False
else:
_notEOF = False
return _data
# Read bytes from the socket with "timeout" I hate this code.
def readSock( self, _sock, len ):
counter = 0
while(counter < 3):
_ambe = _sock.recv(len)
if _ambe: break
sleep(0.1)
counter = counter + 1
return _ambe
# Concatenate 3 frames from the stream into a bit array and return the bytes
def readAmbeFrameFromUDP( self, _sock ):
_ambeAll = BitArray() # Start with an empty array
for i in range(0, 3):
_ambe = self.readSock(_sock,7) # Read AMBE from the socket
if _ambe:
_ambe1 = BitArray('0x'+h(_ambe[0:49]))
_ambeAll += _ambe1[0:50] # Append the 49 bits to the string
else:
break
return _ambeAll.tobytes() # Return the 49 * 3 as an array of bytes
# Set up the socket and run the method to gather the AMBE. Sending it to all peers
def launchUDP(self):
s = socket.socket() # Create a socket object
s.bind(('', self._ambeRxPort)) # Bind to the port
while (1): # Forever!
s.listen(5) # Now wait for client connection.
_sock, addr = s.accept() # Establish connection with client.
if int_id(self._tx_tg) > 0: # Test if we are allowed to transmit
self.playbackFromUDP(_sock, self._system)
else:
self.transmitDisabled(_sock, self._system) #tg is zero, so just eat the network trafic
_sock.close()
# This represents a full transmission (HEAD, VOICE and TERM)
def playbackFromUDP(self, _sock):
_delay = 0.055 # Yes, I know it should be 0.06, but there seems to be some latency, so this is a hack
_src_sub = hex_str_3(self._gateway_dmr_id) # DMR ID to sign this transmission with
_src_peer = NETWORK[self._system]['LOCAL']['RADIO_ID'] # Use this peers ID as the source repeater
logger.info('Transmit from gateway to TG {}:'.format(int_id(self._tx_tg)) )
try:
try:
_t = open('template.bin', 'rb') # Open the template file. This was recorded OTA
_tempHead = [0] * 3 # It appears that there 3 frames of HEAD (mostly the same)
for i in range(0, 3):
_tempHead[i] = self.readRecord(_t, BURST_DATA_TYPE['VOICE_HEAD'])
_tempVoice = [0] * 6
for i in range(0, 6): # Then there are 6 frames of AMBE. We will just use them in order
_tempVoice[i] = self.readRecord(_t, BURST_DATA_TYPE['SLOT2_VOICE'])
_tempTerm = self.readRecord(_t, BURST_DATA_TYPE['VOICE_TERM'])
_t.close()
except IOError:
logger.error('Can not open template.bin file')
return
logger.debug('IPSC templates loaded')
_eof = False
self._seq = randint(0,32767) # A transmission uses a random number to begin its sequence (16 bit)
for i in range(0, 3): # Output the 3 HEAD frames to our peers
self.rewriteFrame(_tempHead[i], self._system, self._tx_ts, self._tx_tg, _src_sub, _src_peer)
#self.group_voice(self._system, _src_sub, self._tx_tg, True, '', hex_str_3(0), _tempHead[i])
sleep(_delay)
i = 0 # Initialize the VOICE template index
while(_eof == False):
_ambe = self.readAmbeFrameFromUDP(_sock) # Read the 49*3 bit sample from the stream
if _ambe:
i = (i + 1) % 6 # Round robbin with the 6 VOICE templates
_frame = _tempVoice[i][:33] + _ambe + _tempVoice[i][52:] # Insert the 3 49 bit AMBE frames
self.rewriteFrame(_frame, self._system, self._tx_ts, self._tx_tg, _src_sub, _src_peer)
#self.group_voice(self._system, _src_sub, self._tx_tg, True, '', hex_str_3(0), _frame)
sleep(_delay) # Since this comes from a file we have to add delay between IPSC frames
else:
_eof = True # There are no more AMBE frames, so terminate the loop
self.rewriteFrame(_tempTerm, self._system, self._tx_ts, self._tx_tg, _src_sub, _src_peer)
#self.group_voice(self._system, _src_sub, self._tx_tg, True, '', hex_str_3(0), _tempTerm)
except IOError:
logger.error('Can not transmit to peers')
logger.info('Transmit complete')
def transmitDisabled(self, _sock):
_eof = False
logger.debug('Transmit disabled begin')
while(_eof == False):
if self.readAmbeFrameFromUDP(_sock):
pass
else:
_eof = True # There are no more AMBE frames, so terminate the loop
logger.debug('Transmit disabled end')
# Debug method used to test the AMBE code.
def playbackFromFile(self, _fileName):
_r = open(_fileName, 'rb')
_eof = False
host = socket.gethostbyname(socket.gethostname()) # Get local machine name
_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
_sock.connect((host, self._ambeRxPort))
while(_eof == False):
for i in range(0, 3):
_ambe = _r.read(7)
if _ambe:
_sock.send(_ambe)
else:
_eof = True
sleep(0.055)
logger.info('File playback complete')
def dumpTemplate(self, _fileName):
_file = open(_fileName, 'rb')
_eof = False
while(_eof == False):
_data = ""
_bLen = _file.read(4)
if _bLen:
_len, = struct.unpack("i", _bLen)
if _len > 0:
_data = _file.read(_len)
self.dumpIPSCFrame(_data)
else:
_eof = True
logger.info('File dump complete')
#************************************************
# CALLBACK FUNCTIONS FOR USER PACKET TYPES
#************************************************
#
def group_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
#self.dumpIPSCFrame(_data)
# THIS FUNCTION IS NOT COMPLETE!!!!
_payload_type = _data[30:31]
# _ambe_frames = _data[33:52]
_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]
_tg_id = int_id(_dst_sub)
self._busy_slots[_ts] = time()
###### DEBUGDEBUGDEBUG
# if _tg_id == 2:
# __iLen = len(_data)
# self._d.write(struct.pack("i", __iLen))
# self._d.write(_data)
# else:
# self.rewriteFrame(_data, self._system, 1, 9)
###### DEBUGDEBUGDEBUG
if _tg_id in self._tg_filter: #All TGs
_dst_sub = get_alias(_dst_sub, talkgroup_ids)
if _payload_type == BURST_DATA_TYPE['VOICE_HEAD']:
if self._currentTG == self._no_tg:
_src_sub = get_subscriber_info(_src_sub)
logger.info('Voice Transmission Start on TS {} and TG {} ({}) from {}'.format(_ts, _dst_sub, _tg_id, _src_sub))
self._sock.sendto('reply log2 {} {}'.format(_src_sub, _tg_id), (self._dmrgui, 34003))
self._currentTG = _tg_id
self._transmitStartTime = time()
self._start_seq = int_id(_data[20:22])
self._packet_count = 0
else:
if self._currentTG != _tg_id:
if time() > self.lastPacketTimeout:
self._currentTG = self._no_tg #looks like we never saw an EOT from the last stream
logger.warning('EOT timeout')
else:
logger.warning('Transmission in progress, will not decode stream on TG {}'.format(_tg_id))
if self._currentTG == _tg_id:
if _payload_type == BURST_DATA_TYPE['VOICE_TERM']:
_source_packets = ( int_id(_data[20:22]) - self._start_seq ) - 3 # the 3 is because the start and end are not part of the voice but counted in the RTP
if self._packet_count > _source_packets:
self._packet_count = _source_packets
if _source_packets > 0:
_lost_percentage = 100.0 - ((self._packet_count / float(_source_packets)) * 100.0)
else:
_lost_percentage = 0.0
_duration = (time() - self._transmitStartTime)
logger.info('Voice Transmission End {:.2f} seconds loss rate: {:.2f}% ({}/{})'.format(_duration, _lost_percentage, _source_packets - self._packet_count, _source_packets))
self._sock.sendto("reply log" +
strftime(" %m/%d/%y %H:%M:%S", localtime(self._transmitStartTime)) +
' {} {} "{}"'.format(get_subscriber_info(_src_sub), _ts, _dst_sub) +
' {:.2f}%'.format(_lost_percentage) +
' {:.2f}s'.format(_duration), (self._dmrgui, 34003))
self._currentTG = self._no_tg
if _payload_type == BURST_DATA_TYPE['SLOT1_VOICE']:
self.outputFrames(_ambe_frames, _ambe_frame1, _ambe_frame2, _ambe_frame3)
self._packet_count += 1
if _payload_type == BURST_DATA_TYPE['SLOT2_VOICE']:
self.outputFrames(_ambe_frames, _ambe_frame1, _ambe_frame2, _ambe_frame3)
self._packet_count += 1
self.lastPacketTimeout = time() + 10
else:
if _payload_type == BURST_DATA_TYPE['VOICE_HEAD']:
_dst_sub = get_alias(_dst_sub, talkgroup_ids)
logger.warning('Ignored Voice Transmission Start on TS {} and TG {}'.format(_ts, _dst_sub))
def outputFrames(self, _ambe_frames, _ambe_frame1, _ambe_frame2, _ambe_frame3):
if self._debug == True:
logger.debug(_ambe_frames)
logger.debug('Frame 1:', self.ByteToHex(_ambe_frame1.tobytes()))
logger.debug('Frame 2:', self.ByteToHex(_ambe_frame2.tobytes()))
logger.debug('Frame 3:', self.ByteToHex(_ambe_frame3.tobytes()))
if self._outToFile == True:
self._f.write( _ambe_frame1.tobytes() )
self._f.write( _ambe_frame2.tobytes() )
self._f.write( _ambe_frame3.tobytes() )
if self._outToUDP == True:
self._sock.sendto(_ambe_frame1.tobytes(), (self._gateway, self._gateway_port))
self._sock.sendto(_ambe_frame2.tobytes(), (self._gateway, self._gateway_port))
self._sock.sendto(_ambe_frame3.tobytes(), (self._gateway, self._gateway_port))
def private_voice(self, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
print('private voice')
# __iLen = len(_data)
# self._d.write(struct.pack("i", __iLen))
# self._d.write(_data)
#
# Remote control thread
# Use netcat to dynamically change ambe_audio without a restart
# echo -n "tgs=x,y,z" | nc 127.0.0.1 31002
# echo -n "reread_subscribers" | nc 127.0.0.1 31002
# echo -n "reread_config" | nc 127.0.0.1 31002
# echo -n "txTg=##" | nc 127.0.0.1 31002
# echo -n "txTs=#" | nc 127.0.0.1 31002
# echo -n "section=XX" | nc 127.0.0.1 31002
#
def remote_control(self, port):
s = socket.socket() # Create a socket object
s.bind(('', port)) # Bind to the port
s.listen(5) # Now wait for client connection.
logger.info('Remote control is listening on {}:{}'.format(socket.getfqdn(), port))
while True:
c, addr = s.accept() # Establish connection with client.
logger.info( 'Got connection from {}'.format(addr) )
self._dmrgui = addr[0]
_tmp = c.recv(1024)
_tmp = _tmp.split(None)[0] #first get rid of whitespace
_cmd = _tmp.split('=')[0]
logger.info('Command:"{}"'.format(_cmd))
if _cmd:
if _cmd == 'reread_subscribers':
reread_subscribers()
elif _cmd == 'reread_config':
self.readConfigFile(self._configFile, None, self._currentNetwork)
elif _cmd == 'txTg':
self._tx_tg = hex_str_3(int(_tmp.split('=')[1]))
print('New txTg = ' + str(int_id(self._tx_tg)))
elif _cmd == 'txTs':
self._tx_ts = int(_tmp.split('=')[1])
print('New txTs = ' + str(self._tx_ts))
elif _cmd == 'section':
self.readConfigFile(self._configFile, _tmp.split('=')[1])
elif _cmd == 'gateway_dmr_id':
self._gateway_dmr_id = int(_tmp.split('=')[1])
print('New gateway_dmr_id = ' + str(self._gateway_dmr_id))
elif _cmd == 'gateway_peer_id':
peerID = int(_tmp.split('=')[1])
self._config['LOCAL']['RADIO_ID'] = hex_str_3(peerID)
print('New peer_id = ' + str(peerID))
elif _cmd == 'restart':
reactor.callFromThread(reactor.stop)
elif _cmd == 'playbackFromFile':
self.playbackFromFile('ambe.bin')
elif _cmd == 'tgs':
_args = _tmp.split('=')[1]
self._tg_filter = map(int, _args.split(','))
logger.info( 'New TGs={}'.format(self._tg_filter) )
elif _cmd == 'dump_template':
self.dumpTemplate('PrivateVoice.bin')
elif _cmd == 'get_alias':
self._sock.sendto('reply dmr_info {} {} {} {}'.format(self._currentNetwork,
int_id(self._CONFIG[self._currentNetwork]['LOCAL']['RADIO_ID']),
self._gateway_dmr_id,
get_subscriber_info(hex_str_3(self._gateway_dmr_id))), (self._dmrgui, 34003))
elif _cmd == 'eval':
_sz = len(_tmp)-5
_evalExpression = _tmp[-_sz:]
_evalResult = eval(_evalExpression)
print("eval of {} is {}".format(_evalExpression, _evalResult))
self._sock.sendto('reply eval {}'.format(_evalResult), (self._dmrgui, 34003))
elif _cmd == 'exec':
_sz = len(_tmp)-5
_evalExpression = _tmp[-_sz:]
exec(_evalExpression)
print("exec of {}".format(_evalExpression))
else:
logger.error('Unknown command')
c.close() # Close the connection
#************************************************
# 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
import dmrlink_log
import dmrlink_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)')
cli_args = parser.parse_args()
if not cli_args.CFG_FILE:
cli_args.CFG_FILE = os.path.dirname(os.path.abspath(__file__))+'/dmrlink.cfg'
# Call the external routine to build the configuration dictionary
CONFIG = dmrlink_config.build_config(cli_args.CFG_FILE)
# Call the external routing to start the system logger
logger = dmrlink_log.config_logging(CONFIG['LOGGER'])
logger.info('DMRlink \'ambe_audio.py\' (c) 2015 N0MJS & the K0USY Group - SYSTEM STARTING...')
# 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 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)
reactor.listenUDP(CONFIG['SYSTEMS'][system]['LOCAL']['PORT'], systems[system], interface=CONFIG['SYSTEMS'][system]['LOCAL']['IP'])
reactor.run()
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