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HBLink3/hblink.py

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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 program does very little on it's own. It is intended to be used as a module
to build applications on top of the HomeBrew Repeater Protocol. By itself, it
will only act as a peer or master for the systems specified in its configuration
file (usually hblink.cfg). It is ALWAYS best practice to ensure that this program
works stand-alone before troubleshooting any applications that use it. It has
sufficient logging to be used standalone as a troubleshooting application.
'''
# Specifig functions from modules we need
from binascii import b2a_hex as ahex
from binascii import a2b_hex as bhex
from random import randint
from hashlib import sha256, sha1
from hmac import new as hmac_new, compare_digest
from time import time
from collections import deque
# Twisted is pretty important, so I keep it separate
from twisted.internet.protocol import DatagramProtocol, Factory, Protocol
from twisted.protocols.basic import NetstringReceiver
from twisted.internet import reactor, task
# Other files we pull from -- this is mostly for readability and segmentation
import log
import config
from const import *
from dmr_utils3.utils import int_id, bytes_4, try_download, mk_id_dict
# Imports for the reporting server
import pickle
from reporting_const import *
# The module needs logging 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'
# Global variables used whether we are a module or __main__
systems = {}
# Timed loop used for reporting HBP status
def config_reports(_config, _factory):
def reporting_loop(_logger, _server):
_logger.debug('(GLOBAL) Periodic reporting loop started')
_server.send_config()
logger.info('(GLOBAL) 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
# Shut ourselves down gracefully by disconnecting from the masters and peers.
def hblink_handler(_signal, _frame):
for system in systems:
logger.info('(GLOBAL) SHUTDOWN: DE-REGISTER SYSTEM: %s', system)
systems[system].dereg()
# Check a supplied ID against the ACL provided. Returns action (True|False) based
# on matching and the action specified.
def acl_check(_id, _acl):
id = int_id(_id)
for entry in _acl[1]:
if entry[0] <= id <= entry[1]:
return _acl[0]
return not _acl[0]
#************************************************
# OPENBRIDGE CLASS
#************************************************
class OPENBRIDGE(DatagramProtocol):
def __init__(self, _name, _config, _report):
# Define a few shortcuts to make the rest of the class more readable
self._CONFIG = _config
self._system = _name
self._report = _report
self._config = self._CONFIG['SYSTEMS'][self._system]
self._laststrid = deque([], 20)
def dereg(self):
logger.info('(%s) is mode OPENBRIDGE. No De-Registration required, continuing shutdown', self._system)
def send_system(self, _packet):
if _packet[:4] == DMRD:
#_packet = _packet[:11] + self._config['NETWORK_ID'] + _packet[15:]
_packet = b''.join([_packet[:11], self._config['NETWORK_ID'], _packet[15:]])
#_packet += hmac_new(self._config['PASSPHRASE'],_packet,sha1).digest()
_packet = b''.join([_packet, (hmac_new(self._config['PASSPHRASE'],_packet,sha1).digest())])
self.transport.write(_packet, (self._config['TARGET_IP'], self._config['TARGET_PORT']))
# KEEP THE FOLLOWING COMMENTED OUT UNLESS YOU'RE DEBUGGING DEEPLY!!!!
# logger.debug('(%s) TX Packet to OpenBridge %s:%s -- %s', self._system, self._config['TARGET_IP'], self._config['TARGET_PORT'], ahex(_packet))
else:
logger.error('(%s) OpenBridge system was asked to send non DMRD packet: %s', self._system, _packet)
def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data):
pass
#print(int_id(_peer_id), int_id(_rf_src), int_id(_dst_id), int_id(_seq), _slot, _call_type, _frame_type, repr(_dtype_vseq), int_id(_stream_id))
def datagramReceived(self, _packet, _sockaddr):
# Keep This Line Commented Unless HEAVILY Debugging!
#logger.debug('(%s) RX packet from %s -- %s', self._system, _sockaddr, ahex(_packet))
if _packet[:4] == DMRD: # DMRData -- encapsulated DMR data frame
_data = _packet[:53]
_hash = _packet[53:]
_ckhs = hmac_new(self._config['PASSPHRASE'],_data,sha1).digest()
if compare_digest(_hash, _ckhs) and _sockaddr == self._config['TARGET_SOCK']:
_peer_id = _data[11:15]
_seq = _data[4]
_rf_src = _data[5:8]
_dst_id = _data[8:11]
_bits = _data[15]
_slot = 2 if (_bits & 0x80) else 1
#_call_type = 'unit' if (_bits & 0x40) else 'group'
if _bits & 0x40:
_call_type = 'unit'
elif (_bits & 0x23) == 0x23:
_call_type = 'vcsbk'
else:
_call_type = 'group'
_frame_type = (_bits & 0x30) >> 4
_dtype_vseq = (_bits & 0xF) # data, 1=voice header, 2=voice terminator; voice, 0=burst A ... 5=burst F
_stream_id = _data[16:20]
#logger.debug('(%s) DMRD - Seqence: %s, RF Source: %s, Destination ID: %s', self._system, int_id(_seq), int_id(_rf_src), int_id(_dst_id))
# Sanity check for OpenBridge -- all calls must be on Slot 1
if _slot != 1:
logger.error('(%s) OpenBridge packet discarded because it was not received on slot 1. SID: %s, TGID %s', self._system, int_id(_rf_src), int_id(_dst_id))
return
# ACL Processing
if self._CONFIG['GLOBAL']['USE_ACL']:
if not acl_check(_rf_src, self._CONFIG['GLOBAL']['SUB_ACL']):
if _stream_id not in self._laststrid:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY GLOBAL ACL', self._system, int_id(_stream_id), int_id(_rf_src))
self._laststrid.append(_stream_id)
return
if _slot == 1 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG1_ACL']):
if _stream_id not in self._laststrid:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY GLOBAL TS1 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid.append(_stream_id)
return
if self._config['USE_ACL']:
if not acl_check(_rf_src, self._config['SUB_ACL']):
if _stream_id not in self._laststrid:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY SYSTEM ACL', self._system, int_id(_stream_id), int_id(_rf_src))
self._laststrid.append(_stream_id)
return
if not acl_check(_dst_id, self._config['TG1_ACL']):
if _stream_id not in self._laststrid:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY SYSTEM ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid.append(_stream_id)
return
# Userland actions -- typically this is the function you subclass for an application
self.dmrd_received(_peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data)
else:
logger.info('(%s) OpenBridge HMAC failed, packet discarded - OPCODE: %s DATA: %s HMAC LENGTH: %s HMAC: %s', self._system, _packet[:4], repr(_packet[:53]), len(_packet[53:]), repr(_packet[53:]))
#************************************************
# HB MASTER CLASS
#************************************************
class HBSYSTEM(DatagramProtocol):
def __init__(self, _name, _config, _report):
# Define a few shortcuts to make the rest of the class more readable
self._CONFIG = _config
self._system = _name
self._report = _report
self._config = self._CONFIG['SYSTEMS'][self._system]
self._laststrid1 = ''
self._laststrid2 = ''
# Define shortcuts and generic function names based on the type of system we are
if self._config['MODE'] == 'MASTER':
self._peers = self._CONFIG['SYSTEMS'][self._system]['PEERS']
self.send_system = self.send_peers
self.maintenance_loop = self.master_maintenance_loop
self.datagramReceived = self.master_datagramReceived
self.dereg = self.master_dereg
elif self._config['MODE'] == 'PEER':
self._stats = self._config['STATS']
self.send_system = self.send_master
self.maintenance_loop = self.peer_maintenance_loop
self.datagramReceived = self.peer_datagramReceived
self.dereg = self.peer_dereg
def startProtocol(self):
# Set up periodic loop for tracking pings from peers. Run every 'PING_TIME' seconds
self._system_maintenance = task.LoopingCall(self.maintenance_loop)
self._system_maintenance_loop = self._system_maintenance.start(self._CONFIG['GLOBAL']['PING_TIME'])
# Aliased in __init__ to maintenance_loop if system is a master
def master_maintenance_loop(self):
logger.debug('(%s) Master maintenance loop started', self._system)
remove_list = []
for peer in self._peers:
_this_peer = self._peers[peer]
# Check to see if any of the peers have been quiet (no ping) longer than allowed
if _this_peer['LAST_PING']+(self._CONFIG['GLOBAL']['PING_TIME']*self._CONFIG['GLOBAL']['MAX_MISSED']) < time():
remove_list.append(peer)
for peer in remove_list:
logger.info('(%s) Peer %s (%s) has timed out and is being removed', self._system, self._peers[peer]['CALLSIGN'], self._peers[peer]['RADIO_ID'])
# Remove any timed out peers from the configuration
del self._CONFIG['SYSTEMS'][self._system]['PEERS'][peer]
# Aliased in __init__ to maintenance_loop if system is a peer
def peer_maintenance_loop(self):
logger.debug('(%s) Peer maintenance loop started', self._system)
if self._stats['PING_OUTSTANDING']:
self._stats['NUM_OUTSTANDING'] += 1
# If we're not connected, zero out the stats and send a login request RPTL
if self._stats['CONNECTION'] != 'YES' or self._stats['NUM_OUTSTANDING'] >= self._CONFIG['GLOBAL']['MAX_MISSED']:
self._stats['PINGS_SENT'] = 0
self._stats['PINGS_ACKD'] = 0
self._stats['NUM_OUTSTANDING'] = 0
self._stats['PING_OUTSTANDING'] = False
self._stats['CONNECTION'] = 'RPTL_SENT'
self.send_master(b''.join([RPTL, self._config['RADIO_ID']]))
logger.info('(%s) Sending login request to master %s:%s', self._system, self._config['MASTER_IP'], self._config['MASTER_PORT'])
# If we are connected, sent a ping to the master and increment the counter
if self._stats['CONNECTION'] == 'YES':
self.send_master(b''.join([RPTPING, self._config['RADIO_ID']]))
logger.debug('(%s) RPTPING Sent to Master. Total Sent: %s, Total Missed: %s, Currently Outstanding: %s', self._system, self._stats['PINGS_SENT'], self._stats['PINGS_SENT'] - self._stats['PINGS_ACKD'], self._stats['NUM_OUTSTANDING'])
self._stats['PINGS_SENT'] += 1
self._stats['PING_OUTSTANDING'] = True
def send_peers(self, _packet):
for _peer in self._peers:
self.send_peer(_peer, _packet)
#logger.debug('(%s) Packet sent to peer %s', self._system, self._peers[_peer]['RADIO_ID'])
def send_peer(self, _peer, _packet):
if _packet[:4] == DMRD:
_packet = b''.join([_packet[:11], _peer, _packet[15:]])
self.transport.write(_packet, self._peers[_peer]['SOCKADDR'])
# KEEP THE FOLLOWING COMMENTED OUT UNLESS YOU'RE DEBUGGING DEEPLY!!!!
#logger.debug('(%s) TX Packet to %s on port %s: %s', self._peers[_peer]['RADIO_ID'], self._peers[_peer]['IP'], self._peers[_peer]['PORT'], ahex(_packet))
def send_master(self, _packet):
if _packet[:4] == DMRD:
_packet = b''.join([_packet[:11], self._config['RADIO_ID'], _packet[15:]])
self.transport.write(_packet, self._config['MASTER_SOCKADDR'])
# KEEP THE FOLLOWING COMMENTED OUT UNLESS YOU'RE DEBUGGING DEEPLY!!!!
# logger.debug('(%s) TX Packet to %s:%s -- %s', self._system, self._config['MASTER_IP'], self._config['MASTER_PORT'], ahex(_packet))
def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data):
pass
def master_dereg(self):
for _peer in self._peers:
self.send_peer(_peer, MSTCL + _peer)
logger.info('(%s) De-Registration sent to Peer: %s (%s)', self._system, self._peers[_peer]['CALLSIGN'], self._peers[_peer]['RADIO_ID'])
def peer_dereg(self):
self.send_master(RPTCL + self._config['RADIO_ID'])
logger.info('(%s) De-Registration sent to Master: %s:%s', self._system, self._config['MASTER_SOCKADDR'][0], self._config['MASTER_SOCKADDR'][1])
# Aliased in __init__ to datagramReceived if system is a master
def master_datagramReceived(self, _data, _sockaddr):
# Keep This Line Commented Unless HEAVILY Debugging!
# logger.debug('(%s) RX packet from %s -- %s', self._system, _sockaddr, ahex(_data))
# Extract the command, which is various length, all but one 4 significant characters -- RPTCL
_command = _data[:4]
if _command == DMRD: # DMRData -- encapsulated DMR data frame
_peer_id = _data[11:15]
if _peer_id in self._peers \
and self._peers[_peer_id]['CONNECTION'] == 'YES' \
and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
_seq = _data[4]
_rf_src = _data[5:8]
_dst_id = _data[8:11]
_bits = _data[15]
_slot = 2 if (_bits & 0x80) else 1
#_call_type = 'unit' if (_bits & 0x40) else 'group'
if _bits & 0x40:
_call_type = 'unit'
elif (_bits & 0x23) == 0x23:
_call_type = 'vcsbk'
else:
_call_type = 'group'
_frame_type = (_bits & 0x30) >> 4
_dtype_vseq = (_bits & 0xF) # data, 1=voice header, 2=voice terminator; voice, 0=burst A ... 5=burst F
_stream_id = _data[16:20]
#logger.debug('(%s) DMRD - Seqence: %s, RF Source: %s, Destination ID: %s', self._system, int_id(_seq), int_id(_rf_src), int_id(_dst_id))
# ACL Processing
if self._CONFIG['GLOBAL']['USE_ACL']:
if not acl_check(_rf_src, self._CONFIG['GLOBAL']['SUB_ACL']):
if self._laststrid != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY GLOBAL ACL', self._system, int_id(_stream_id), int_id(_rf_src))
if _slot == 1:
self._laststrid1 = _stream_id
else:
self._laststrid2 = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG1_ACL']):
if self._laststrid1 != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY GLOBAL TS1 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid1 = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG2_ACL']):
if self._laststrid2 != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY GLOBAL TS2 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid2 = _stream_id
return
if self._config['USE_ACL']:
if not acl_check(_rf_src, self._config['SUB_ACL']):
if self._laststrid != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY SYSTEM ACL', self._system, int_id(_stream_id), int_id(_rf_src))
if _slot == 1:
self._laststrid1 = _stream_id
else:
self._laststrid2 = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._config['TG1_ACL']):
if self._laststrid1 != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY SYSTEM TS1 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid1 = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._config['TG2_ACL']):
if self._laststrid2 != _stream_id:
logger.info('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY SYSTEM TS2 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid2 = _stream_id
return
# The basic purpose of a master is to repeat to the peers
if self._config['REPEAT'] == True:
pkt = [_data[:11], '', _data[15:]]
for _peer in self._peers:
if _peer != _peer_id:
pkt[1] = _peer
self.transport.write(b''.join(pkt), self._peers[_peer]['SOCKADDR'])
#logger.debug('(%s) Packet on TS%s from %s (%s) for destination ID %s repeated to peer: %s (%s) [Stream ID: %s]', self._system, _slot, self._peers[_peer_id]['CALLSIGN'], int_id(_peer_id), int_id(_dst_id), self._peers[_peer]['CALLSIGN'], int_id(_peer), int_id(_stream_id))
# Userland actions -- typically this is the function you subclass for an application
self.dmrd_received(_peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data)
elif _command == RPTL: # RPTLogin -- a repeater wants to login
_peer_id = _data[4:8]
# Check to see if we've reached the maximum number of allowed peers
if len(self._peers) < self._config['MAX_PEERS']:
# Check for valid Radio ID
if acl_check(_peer_id, self._CONFIG['GLOBAL']['REG_ACL']) and acl_check(_peer_id, self._config['REG_ACL']):
# Build the configuration data strcuture for the peer
self._peers.update({_peer_id: {
'CONNECTION': 'RPTL-RECEIVED',
'CONNECTED': time(),
'PINGS_RECEIVED': 0,
'LAST_PING': time(),
'SOCKADDR': _sockaddr,
'IP': _sockaddr[0],
'PORT': _sockaddr[1],
'SALT': randint(0,0xFFFFFFFF),
'RADIO_ID': str(int(ahex(_peer_id), 16)),
'CALLSIGN': '',
'RX_FREQ': '',
'TX_FREQ': '',
'TX_POWER': '',
'COLORCODE': '',
'LATITUDE': '',
'LONGITUDE': '',
'HEIGHT': '',
'LOCATION': '',
'DESCRIPTION': '',
'SLOTS': '',
'URL': '',
'SOFTWARE_ID': '',
'PACKAGE_ID': '',
}})
logger.info('(%s) Repeater Logging in with Radio ID: %s, %s:%s', self._system, int_id(_peer_id), _sockaddr[0], _sockaddr[1])
_salt_str = bytes_4(self._peers[_peer_id]['SALT'])
self.send_peer(_peer_id, b''.join([RPTACK, _salt_str]))
self._peers[_peer_id]['CONNECTION'] = 'CHALLENGE_SENT'
logger.info('(%s) Sent Challenge Response to %s for login: %s', self._system, int_id(_peer_id), self._peers[_peer_id]['SALT'])
else:
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
logger.warning('(%s) Invalid Login from Radio ID: %s Denied by Registation ACL', self._system, int_id(_peer_id))
else:
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
logger.warning('(%s) Registration denied from Radio ID: %s Maximum number of peers exceeded', self._system, int_id(_peer_id))
elif _command == RPTK: # Repeater has answered our login challenge
_peer_id = _data[4:8]
if _peer_id in self._peers \
and self._peers[_peer_id]['CONNECTION'] == 'CHALLENGE_SENT' \
and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
_this_peer = self._peers[_peer_id]
_this_peer['LAST_PING'] = time()
_sent_hash = _data[8:]
_salt_str = bytes_4(_this_peer['SALT'])
_calc_hash = bhex(sha256(_salt_str+self._config['PASSPHRASE']).hexdigest())
if _sent_hash == _calc_hash:
_this_peer['CONNECTION'] = 'WAITING_CONFIG'
self.send_peer(_peer_id, b''.join([RPTACK, _peer_id]))
logger.info('(%s) Peer %s has completed the login exchange successfully', self._system, _this_peer['RADIO_ID'])
else:
logger.info('(%s) Peer %s has FAILED the login exchange successfully', self._system, _this_peer['RADIO_ID'])
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
del self._peers[_peer_id]
else:
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
logger.warning('(%s) Login challenge from Radio ID that has not logged in: %s', self._system, int_id(_peer_id))
elif _command == RPTC: # Repeater is sending it's configuraiton OR disconnecting
if _data[:5] == RPTCL: # Disconnect command
_peer_id = _data[5:9]
if _peer_id in self._peers \
and self._peers[_peer_id]['CONNECTION'] == 'YES' \
and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
logger.info('(%s) Peer is closing down: %s (%s)', self._system, self._peers[_peer_id]['CALLSIGN'], int_id(_peer_id))
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
del self._peers[_peer_id]
else:
_peer_id = _data[4:8] # Configure Command
if _peer_id in self._peers \
and self._peers[_peer_id]['CONNECTION'] == 'WAITING_CONFIG' \
and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
_this_peer = self._peers[_peer_id]
_this_peer['CONNECTION'] = 'YES'
_this_peer['CONNECTED'] = time()
_this_peer['LAST_PING'] = time()
_this_peer['CALLSIGN'] = _data[8:16]
_this_peer['RX_FREQ'] = _data[16:25]
_this_peer['TX_FREQ'] = _data[25:34]
_this_peer['TX_POWER'] = _data[34:36]
_this_peer['COLORCODE'] = _data[36:38]
_this_peer['LATITUDE'] = _data[38:46]
_this_peer['LONGITUDE'] = _data[46:55]
_this_peer['HEIGHT'] = _data[55:58]
_this_peer['LOCATION'] = _data[58:78]
_this_peer['DESCRIPTION'] = _data[78:97]
_this_peer['SLOTS'] = _data[97:98]
_this_peer['URL'] = _data[98:222]
_this_peer['SOFTWARE_ID'] = _data[222:262]
_this_peer['PACKAGE_ID'] = _data[262:302]
self.send_peer(_peer_id, b''.join([RPTACK, _peer_id]))
logger.info('(%s) Peer %s (%s) has sent repeater configuration', self._system, _this_peer['CALLSIGN'], _this_peer['RADIO_ID'])
else:
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
logger.warning('(%s) Peer info from Radio ID that has not logged in: %s', self._system, int_id(_peer_id))
elif _command == RPTP: # RPTPing -- peer is pinging us
_peer_id = _data[7:11]
if _peer_id in self._peers \
and self._peers[_peer_id]['CONNECTION'] == "YES" \
and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
self._peers[_peer_id]['PINGS_RECEIVED'] += 1
self._peers[_peer_id]['LAST_PING'] = time()
self.send_peer(_peer_id, b''.join([MSTPONG, _peer_id]))
logger.debug('(%s) Received and answered RPTPING from peer %s (%s)', self._system, self._peers[_peer_id]['CALLSIGN'], int_id(_peer_id))
else:
self.transport.write(b''.join([MSTNAK, _peer_id]), _sockaddr)
logger.warning('(%s) Ping from Radio ID that is not logged in: %s', self._system, int_id(_peer_id))
else:
logger.error('(%s) Unrecognized command. Raw HBP PDU: %s', self._system, ahex(_data))
# Aliased in __init__ to datagramReceived if system is a peer
def peer_datagramReceived(self, _data, _sockaddr):
# Keep This Line Commented Unless HEAVILY Debugging!
# logger.debug('(%s) RX packet from %s -- %s', self._system, _sockaddr, ahex(_data))
# Validate that we receveived this packet from the master - security check!
if self._config['MASTER_SOCKADDR'] == _sockaddr:
# Extract the command, which is various length, but only 4 significant characters
_command = _data[:4]
if _command == DMRD: # DMRData -- encapsulated DMR data frame
_peer_id = _data[11:15]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
_seq = _data[4:5]
_rf_src = _data[5:8]
_dst_id = _data[8:11]
_bits = _data[15]
_slot = 2 if (_bits & 0x80) else 1
#_call_type = 'unit' if (_bits & 0x40) else 'group'
if _bits & 0x40:
_call_type = 'unit'
elif (_bits & 0x23) == 0x23:
_call_type = 'vcsbk'
else:
_call_type = 'group'
_frame_type = (_bits & 0x30) >> 4
_dtype_vseq = (_bits & 0xF) # data, 1=voice header, 2=voice terminator; voice, 0=burst A ... 5=burst F
_stream_id = _data[16:20]
#logger.debug('(%s) DMRD - Sequence: %s, RF Source: %s, Destination ID: %s', self._system, int_id(_seq), int_id(_rf_src), int_id(_dst_id))
# ACL Processing
if self._CONFIG['GLOBAL']['USE_ACL']:
if not acl_check(_rf_src, self._CONFIG['GLOBAL']['SUB_ACL']):
if self._laststrid != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY GLOBAL ACL', self._system, int_id(_stream_id), int_id(_rf_src))
if _slot == 1:
self._laststrid1 = _stream_id
else:
self._laststrid2 = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG1_ACL']):
if self._laststrid1 != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY GLOBAL TS1 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid1 = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG2_ACL']):
if self._laststrid2 != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY GLOBAL TS2 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid2 = _stream_id
return
if self._config['USE_ACL']:
if not acl_check(_rf_src, self._config['SUB_ACL']):
if self._laststrid != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s FROM SUBSCRIBER %s BY SYSTEM ACL', self._system, int_id(_stream_id), int_id(_rf_src))
if _slot == 1:
self._laststrid1 = _stream_id
else:
self._laststrid2 = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._config['TG1_ACL']):
if self._laststrid1 != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY SYSTEM TS1 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid1 = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._config['TG2_ACL']):
if self._laststrid2 != _stream_id:
logger.debug('(%s) CALL DROPPED WITH STREAM ID %s ON TGID %s BY SYSTEM TS2 ACL', self._system, int_id(_stream_id), int_id(_dst_id))
self._laststrid2 = _stream_id
return
# Userland actions -- typically this is the function you subclass for an application
self.dmrd_received(_peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data)
elif _command == MSTN: # Actually MSTNAK -- a NACK from the master
_peer_id = _data[6:10]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
logger.warning('(%s) MSTNAK Received. Resetting connection to the Master.', self._system)
self._stats['CONNECTION'] = 'NO' # Disconnect ourselves and re-register
self._stats['CONNECTED'] = time()
elif _command == RPTA: # Actually RPTACK -- an ACK from the master
# Depending on the state, an RPTACK means different things, in each clause, we check and/or set the state
if self._stats['CONNECTION'] == 'RPTL_SENT': # If we've sent a login request...
_login_int32 = _data[6:10]
logger.info('(%s) Repeater Login ACK Received with 32bit ID: %s', self._system, int_id(_login_int32))
_pass_hash = sha256(b''.join([_login_int32, self._config['PASSPHRASE']])).hexdigest()
_pass_hash = bhex(_pass_hash)
self.send_master(b''.join([RPTK, self._config['RADIO_ID'], _pass_hash]))
self._stats['CONNECTION'] = 'AUTHENTICATED'
elif self._stats['CONNECTION'] == 'AUTHENTICATED': # If we've sent the login challenge...
_peer_id = _data[6:10]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
logger.info('(%s) Repeater Authentication Accepted', self._system)
_config_packet = b''.join([\
self._config['RADIO_ID'],\
self._config['CALLSIGN'],\
self._config['RX_FREQ'],\
self._config['TX_FREQ'],\
self._config['TX_POWER'],\
self._config['COLORCODE'],\
self._config['LATITUDE'],\
self._config['LONGITUDE'],\
self._config['HEIGHT'],\
self._config['LOCATION'],\
self._config['DESCRIPTION'],\
self._config['SLOTS'],\
self._config['URL'],\
self._config['SOFTWARE_ID'],\
self._config['PACKAGE_ID']\
])
self.send_master(b''.join([RPTC, _config_packet]))
self._stats['CONNECTION'] = 'CONFIG-SENT'
logger.info('(%s) Repeater Configuration Sent', self._system)
else:
self._stats['CONNECTION'] = 'NO'
logger.error('(%s) Master ACK Contained wrong ID - Connection Reset', self._system)
elif self._stats['CONNECTION'] == 'CONFIG-SENT': # If we've sent out configuration to the master
_peer_id = _data[6:10]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
logger.info('(%s) Repeater Configuration Accepted', self._system)
if self._config['OPTIONS']:
self.send_master(b''.join([RPTO, self._config['RADIO_ID'], self._config['OPTIONS']]))
self._stats['CONNECTION'] = 'OPTIONS-SENT'
logger.info('(%s) Sent options: (%s)', self._system, self._config['OPTIONS'])
else:
self._stats['CONNECTION'] = 'YES'
self._stats['CONNECTED'] = time()
logger.info('(%s) Connection to Master Completed', self._system)
else:
self._stats['CONNECTION'] = 'NO'
logger.error('(%s) Master ACK Contained wrong ID - Connection Reset', self._system)
elif self._stats['CONNECTION'] == 'OPTIONS-SENT': # If we've sent out options to the master
_peer_id = _data[6:10]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
logger.info('(%s) Repeater Options Accepted', self._system)
self._stats['CONNECTION'] = 'YES'
self._stats['CONNECTED'] = time()
logger.info('(%s) Connection to Master Completed with options', self._system)
else:
self._stats['CONNECTION'] = 'NO'
logger.error('(%s) Master ACK Contained wrong ID - Connection Reset', self._system)
elif _command == MSTP: # Actually MSTPONG -- a reply to RPTPING (send by peer)
_peer_id = _data[7:11]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
self._stats['PING_OUTSTANDING'] = False
self._stats['NUM_OUTSTANDING'] = 0
self._stats['PINGS_ACKD'] += 1
logger.debug('(%s) MSTPONG Received. Pongs Since Connected: %s', self._system, self._stats['PINGS_ACKD'])
elif _command == MSTC: # Actually MSTCL -- notify us the master is closing down
_peer_id = _data[5:9]
if self._config['LOOSE'] or _peer_id == self._config['RADIO_ID']: # Validate the Radio_ID unless using loose validation
self._stats['CONNECTION'] = 'NO'
logger.info('(%s) MSTCL Recieved', self._system)
else:
logger.error('(%s) Received an invalid command in packet: %s', self._system, ahex(_data))
#
# Socket-based reporting section
#
class report(NetstringReceiver):
def __init__(self, factory):
self._factory = factory
def connectionMade(self):
self._factory.clients.append(self)
logger.info('(REPORT) HBlink reporting client connected: %s', self.transport.getPeer())
def connectionLost(self, reason):
logger.info('(REPORT) HBlink reporting client disconnected: %s', self.transport.getPeer())
self._factory.clients.remove(self)
def stringReceived(self, data):
self.process_message(data)
def process_message(self, _message):
opcode = _message[:1]
if opcode == REPORT_OPCODES['CONFIG_REQ']:
logger.info('(REPORT) HBlink reporting client sent \'CONFIG_REQ\': %s', self.transport.getPeer())
self.send_config()
else:
logger.error('(REPORT) got unknown opcode')
class reportFactory(Factory):
def __init__(self, config):
self._config = config
def buildProtocol(self, addr):
if (addr.host) in self._config['REPORTS']['REPORT_CLIENTS'] or '*' in self._config['REPORTS']['REPORT_CLIENTS']:
logger.debug('(REPORT) Permitting report server connection attempt from: %s:%s', addr.host, addr.port)
return report(self)
else:
logger.error('(REPORT) Invalid report server connection attempt from: %s:%s', addr.host, addr.port)
return None
def send_clients(self, _message):
for client in self.clients:
client.sendString(_message)
def send_config(self):
serialized = pickle.dumps(self._config['SYSTEMS'], protocol=2) #.decode('utf-8', errors='ignore') #pickle.HIGHEST_PROTOCOL)
self.send_clients(b''.join([REPORT_OPCODES['CONFIG_SND'], serialized]))
# ID ALIAS CREATION
# Download
def mk_aliases(_config):
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('(GLOBAL) %s', 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('(GLOBAL) %s', result)
# Make Dictionaries
peer_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'])
if peer_ids:
logger.info('(GLOBAL) 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('(GLOBAL) 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('(GLOBAL) ID ALIAS MAPPER: talkgroup_ids dictionary is available')
return peer_ids, subscriber_ids, talkgroup_ids
#************************************************
# MAIN PROGRAM LOOP STARTS HERE
#************************************************
if __name__ == '__main__':
# Python modules we need
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 execution directory
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)
# Call the external routing to 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: HBLINK 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.SIGTERM, signal.SIGINT]:
signal.signal(sig, sig_handler)
peer_ids, subscriber_ids, talkgroup_ids = mk_aliases(CONFIG)
# INITIALIZE THE REPORTING LOOP
if CONFIG['REPORTS']['REPORT']:
report_server = config_reports(CONFIG, reportFactory)
else:
report_server = None
logger.info('(REPORT) TCP Socket reporting not configured')
# HBlink instance creation
logger.info('(GLOBAL) HBlink \'HBlink.py\' -- SYSTEM STARTING...')
for system in CONFIG['SYSTEMS']:
if CONFIG['SYSTEMS'][system]['ENABLED']:
if CONFIG['SYSTEMS'][system]['MODE'] == 'OPENBRIDGE':
systems[system] = OPENBRIDGE(system, CONFIG, report_server)
else:
systems[system] = HBSYSTEM(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])
reactor.run()
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