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RYSEN/hblink.py
Simon f8bd5b00df Allow null passphrase for MASTER logins 
New config options for this in GLOBAL config section

If pashphrase is null and this option is set, login will always succeed
2021-01-23 11:43:56 +00:00

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#!/usr/bin/env python
#
###############################################################################
# Copyright (C) 2016-2019 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 its 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
from threading import Semaphore
# 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) 2016-2019 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._laststrid = {1: b'', 2: b''}
self._peer_sema = Semaphore(value=1)
# 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
elif self._config['MODE'] == 'XLXPEER':
self._stats = self._config['XLXSTATS']
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)
self._peer_sema.acquire(blocking=True)
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]
self._peer_sema.release()
if 'PEERS' not in self._CONFIG['SYSTEMS'][self._system] and 'OPTIONS' in self._CONFIG['SYSTEMS'][self._system]:
logger.info('(%s) Deleting HBP Options',self._system)
del self._CONFIG['SYSTEMS'][self._system]['OPTIONS']
# 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 send_xlxmaster(self, radio, xlx, mastersock):
radio3 = int.from_bytes(radio, 'big').to_bytes(3, 'big')
radio4 = int.from_bytes(radio, 'big').to_bytes(4, 'big')
xlx3 = xlx.to_bytes(3, 'big')
streamid = randint(0,255).to_bytes(1, 'big')+randint(0,255).to_bytes(1, 'big')+randint(0,255).to_bytes(1, 'big')+randint(0,255).to_bytes(1, 'big')
# Wait for .5 secs for the XLX to log us in
for packetnr in range(5):
if packetnr < 3:
# First 3 packets, voice start, stream type e1
strmtype = 225
payload = bytearray.fromhex('4f2e00b501ae3a001c40a0c1cc7dff57d75df5d5065026f82880bd616f13f185890000')
else:
# Last 2 packets, voice end, stream type e2
strmtype = 226
payload = bytearray.fromhex('4f410061011e3a781c30a061ccbdff57d75df5d2534425c02fe0b1216713e885ba0000')
packetnr1 = packetnr.to_bytes(1, 'big')
strmtype1 = strmtype.to_bytes(1, 'big')
_packet = b''.join([DMRD, packetnr1, radio3, xlx3, radio4, strmtype1, streamid, payload])
self.transport.write(_packet, mastersock)
# KEEP THE FOLLOWING COMMENTED OUT UNLESS YOU'RE DEBUGGING DEEPLY!!!!
#logger.debug('(%s) XLX Module Change Packet: %s', self._system, ahex(_packet))
return
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, _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[_slot] != _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))
self._laststrid[_slot] = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG1_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG2_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if self._config['USE_ACL']:
if not acl_check(_rf_src, self._config['SUB_ACL']):
if self._laststrid[_slot] != _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))
self._laststrid[_slot] = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._config['TG1_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._config['TG2_ACL']):
if self._laststrid[_slot]!= _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._laststrid[_slot] = _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'] or _peer_id in self._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._peer_sema.acquire(blocking=True)
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': '',
}})
self._peer_sema.release()
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 %s Radio ID: %s Denied by Registation ACL', self._system, _sockaddr[0], 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:
self._peer_sema.acquire(blocking=True)
_this_peer = self._peers[_peer_id]
_this_peer['LAST_PING'] = time()
self._peer_sema.release()
_sent_hash = _data[8:]
_salt_str = bytes_4(_this_peer['SALT'])
if self._CONFIG['GLOBAL']['ALLOW_NULL_PASSPHRASE'] and len(self._config['PASSPHRASE']) == 0:
_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:
_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)
self._peer_sema.acquire(blocking=True)
del self._peers[_peer_id]
self._peer_sema.release()
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)
self._peer_sema.acquire(blocking=True)
del self._peers[_peer_id]
self._peer_sema.release()
if 'OPTIONS' in self._CONFIG['SYSTEMS'][self._system]:
logger.info('(%s) Deleting HBP Options',self._system)
del self._CONFIG['SYSTEMS'][self._system]['OPTIONS']
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:
self._peer_sema.acquire(blocking=True)
_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._peer_sema.release()
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 == RPTO:
_peer_id = _data[4:8]
if _peer_id in self._peers and self._peers[_peer_id]['SOCKADDR'] == _sockaddr:
_this_peer = self._peers[_peer_id]
self._peer_sema.acquire(blocking=True)
_this_peer['OPTIONS'] = _data[8:]
self._peer_sema.release()
self.send_peer(_peer_id, b''.join([RPTACK, _peer_id]))
logger.info('(%s) Peer %s has sent options %s', self._system, _this_peer['CALLSIGN'], _this_peer['OPTIONS'])
self._CONFIG['SYSTEMS'][self._system]['OPTIONS'] = _this_peer['OPTIONS'].decode()
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._peer_sema.acquire(blocking=True)
self._peers[_peer_id]['PINGS_RECEIVED'] += 1
self._peers[_peer_id]['LAST_PING'] = time()
self._peer_sema.release()
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))
elif _command == DMRA:
_peer_id = _data[4:8]
logger.info('(%s) Peer has sent Talker Alias packet %s', self._system, _data)
else:
logger.error('(%s) Unrecognized command. Raw HBP PDU: %s', self._system, _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[_slot] != _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))
self._laststrid[_slot] = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG1_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._CONFIG['GLOBAL']['TG2_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if self._config['USE_ACL']:
if not acl_check(_rf_src, self._config['SUB_ACL']):
if self._laststrid[_slot] != _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))
self._laststrid[_slot] = _stream_id
return
if _slot == 1 and not acl_check(_dst_id, self._config['TG1_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _stream_id
return
if _slot == 2 and not acl_check(_dst_id, self._config['TG2_ACL']):
if self._laststrid[_slot] != _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._laststrid[_slot] = _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)
# If we are an XLX, send the XLX module request here.
if self._config['MODE'] == 'XLXPEER':
self.send_xlxmaster(self._config['RADIO_ID'], int(4000), self._config['MASTER_SOCKADDR'])
self.send_xlxmaster(self._config['RADIO_ID'], self._config['XLXMODULE'], self._config['MASTER_SOCKADDR'])
logger.info('(%s) Sending XLX Module request', 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)
logger.debug('(REPORT) Send config')
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, 2019\n\tThe Regents 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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