Adds support for new Bridge Control OPCODE - BCSQ

BCSQ is Source Quench or Squelch

When a stream id is received from more than one source on a TG
the system sends a BCSQ to all of the non-first systems to ask them
to stop sending this stream ID. This reduces network and CPU load. Also
packets can't loop of they arent even received!

Squashed commit of the following:

commit e5ba9ece5d84e56096c459139fb39eba16249f96
Author: Simon <simon@gb7fr.org.uk>
Date:   Mon Apr 12 23:16:30 2021 +0100

    Tidy up log handling for streams

commit fc1e4bd91f0e576e8c58e84cf4b96f00ce6ec933
Author: Simon <simon@gb7fr.org.uk>
Date:   Mon Apr 12 22:56:45 2021 +0100

    Fix target port (BCKA)

commit 27e046e5efe744679c7652f65135cf3129481092
Author: Simon <simon@gb7fr.org.uk>
Date:   Mon Apr 12 22:50:35 2021 +0100

    Handle keyerror

commit 99c660fa813a300940b16e55d840218f1868cadb
Author: Simon <simon@gb7fr.org.uk>
Date:   Mon Apr 12 22:45:05 2021 +0100

    Stream trimmer for BCSQ

commit 9d6102be13813b27b752192e29e94d5eafbbb934
Author: Simon <simon@gb7fr.org.uk>
Date:   Mon Apr 12 21:32:54 2021 +0100

    Brack

commit 2f8a8cf620153cb0138e970c0dcd85328a47521c
Merge: f77a68a 17b6968
Author: Simon <simon@gb7fr.org.uk>
Date:   Sun Apr 11 22:16:38 2021 +0100

    Merge branch 'master' into bcsq

commit f77a68a96297fe050609b8ee5fb56b0866ec78f4
Merge: 7f4c6f5 9a3e5fb
Author: Simon <simon@gb7fr.org.uk>
Date:   Fri Apr 9 01:39:54 2021 +0100

    Merge branch 'master' into bcsq

commit 7f4c6f5375b589aa78e74f0002448afe95a625a2
Author: Simon <simon@gb7fr.org.uk>
Date:   Thu Apr 8 18:35:08 2021 +0100

    c

commit c0904242e0f532c26e33bdd9cba8d1bea5329abc
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 19:05:40 2021 +0100

    only try to quench the source once

commit 2748d0cf7c5557522a5b2d0d9e3b37e294711910
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:56:05 2021 +0100

    Comment out check for enahnced to tes

commit fa43a09db73862343f0f70a367786c4d77aaf9b9
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:51:19 2021 +0100

    Dst id not tgid

commit f02df6edf10cfa936147b0862671ed949a820785
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:48:44 2021 +0100

    More BCSQ

commit adf3bb4059f0710848f8e3349722141836889c41
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:44:15 2021 +0100

    more BCKA fixes

commit b4dc518d9b74a0d8c83b3b1bb17d7de4d04b9915
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:42:13 2021 +0100

    Fix broken BKCA

commit 637d772dbadb346ad49d5b80d8299c13b0fbfc79
Author: Simon <simon@gb7fr.org.uk>
Date:   Tue Apr 6 18:38:17 2021 +0100

    More work on BCSQ

bridge_master.py

@@ -366,17 +366,18 @@ def stream_trimmer_loop():
                 _slot  = systems[system].STATUS[slot]
 
                 # RX slot check
-                if _slot['RX_TYPE'] != HBPF_SLT_VTERM and _slot['RX_TIME'] <  _now - 60:
+                if _slot['RX_TYPE'] != HBPF_SLT_VTERM and _slot['RX_TIME'] <  _now - 5:
                     _slot['RX_TYPE'] = HBPF_SLT_VTERM
                     logger.info('(%s) *TIME OUT*  RX STREAM ID: %s SUB: %s TGID %s, TS %s, Duration: %.2f', \
                         system, int_id(_slot['RX_STREAM_ID']), int_id(_slot['RX_RFS']), int_id(_slot['RX_TGID']), slot, _slot['RX_TIME'] - _slot['RX_START'])
                     if CONFIG['REPORTS']['REPORT']:
                         systems[system]._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(system, int_id(_slot['RX_STREAM_ID']), int_id(_slot['RX_PEER']), int_id(_slot['RX_RFS']), slot, int_id(_slot['RX_TGID']), _slot['RX_TIME'] - _slot['RX_START']).encode(encoding='utf-8', errors='ignore'))
-                    #Null stream_id - for loop control 
+                #Null stream_id - for loop control 
+                if _slot['RX_TIME'] < _now - 60:
                     _slot['RX_STREAM_ID'] = b'\x00'
 
                 # TX slot check
-                if _slot['TX_TYPE'] != HBPF_SLT_VTERM and _slot['TX_TIME'] <  _now - 60:
+                if _slot['TX_TYPE'] != HBPF_SLT_VTERM and _slot['TX_TIME'] <  _now - 5:
                     _slot['TX_TYPE'] = HBPF_SLT_VTERM
                     logger.info('(%s) *TIME OUT*  TX STREAM ID: %s SUB: %s TGID %s, TS %s, Duration: %.2f', \
                         system, int_id(_slot['TX_STREAM_ID']), int_id(_slot['TX_RFS']), int_id(_slot['TX_TGID']), slot, _slot['TX_TIME'] - _slot['TX_START'])
@@ -417,6 +418,13 @@ def stream_trimmer_loop():
                     if CONFIG['REPORTS']['REPORT']:
                             systems[system]._report.send_bridgeEvent('GROUP VOICE,END,RX,{},{},{},{},{},{},{:.2f}'.format(system, int_id(stream_id), int_id(_sysconfig['NETWORK_ID']), int_id(_stream['RFS']), 1, int_id(_stream['TGID']), _stream['LAST'] - _stream['START']).encode(encoding='utf-8', errors='ignore'))
                     removed = systems[system].STATUS.pop(stream_id)
+                
+                    try:
+                        for tgid in _sysconfig['_bcsq']:
+                            if sysconfig['_bcsq'][tgid] == stream_id:
+                                removed = sysconfig['_bcsq'].pop(tgid)
+                    except KeyError:
+                        pass
                 else:
                     logger.error('(%s) Attemped to remove OpenBridge Stream ID %s not in the Stream ID list: %s', system, int_id(stream_id), [id for id in systems[system].STATUS])
 
@@ -1072,6 +1080,12 @@ class routerOBP(OPENBRIDGE):
                     #We want to ignore this system and TS combination if it's called again for this packet
                     _sysIgnore.append((_target['SYSTEM'],_target['TS']))
         
+                    if ('_bcsq' in _target_system) and (_dst_id in _target_system['_bcsq']) and (_target_system['_bcsq'][_dst_id] == _stream_id):
+                        #logger.info('(%s) Conference Bridge: %s, is Source Quenched for Stream ID: %s, skipping system: %s TS: %s, TGID: %s', self._system, _bridge, int_id(_stream_id), _target['SYSTEM'], _target['TS'], int_id(_target['TGID']))
+                        continue
+                        
+                        
+                    
                     # Is this a new call stream on the target?
                     if (_stream_id not in _target_status):
                         # This is a new call stream on the target
@@ -1261,8 +1275,9 @@ class routerOBP(OPENBRIDGE):
 
             else:
                 
-                if '_fin' in self.STATUS[_stream_id]:
+                if '_fin' in self.STATUS[_stream_id] and '_finlog' not in self.STATUS[_stream_id]:
                    logger.warning("(%s) OBP *LoopControl* STREAM ID: %s ALREADY FINISHED FROM THIS SOURCE, IGNORING",self._system, int_id(_stream_id))
+                   self.STATUS[_stream_id]['_finlog'] = True
                    return
                
                # Loop Control
@@ -1298,6 +1313,13 @@ class routerOBP(OPENBRIDGE):
                                 logger.warning("(%s) OBP *LoopControl* FIRST OBP %s, STREAM ID: %s, TG %s, IGNORE THIS SOURCE",self._system, system, int_id(_stream_id), int_id(_dst_id))
                                 self.STATUS[_stream_id]['LOOPLOG'] = True
                             self.STATUS[_stream_id]['LAST'] = pkt_time
+                            
+                            if CONFIG['SYSTEMS'][self._system]['ENHANCED_OBP'] and '_bcsq' not in self.STATUS[_stream_id]:
+                                systems[self._system].send_bcsq(_dst_id,_stream_id)
+                                logger.warning("(%s) OBP *BridgeControl* This system Sent BCSQ , STREAM ID: %s, TG %s",self._system, int_id(_stream_id), int_id(_dst_id))
+                                self.STATUS[_stream_id]['_bcsq'] = True
+                                
+                                
                             return
 
 
@@ -1317,6 +1339,7 @@ class routerOBP(OPENBRIDGE):
                 #if _bridge[0:1] != '#':
                 #if True:
                     for _system in BRIDGES[_bridge]:
+                        
                         if _system['SYSTEM'] == self._system and _system['TGID'] == _dst_id and _system['TS'] == _slot and _system['ACTIVE'] == True:
                             _sysIgnore = self.to_target(_peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data, pkt_time, dmrpkt, _bits,_bridge,_system,False,_sysIgnore)
 

const.py

@@ -72,6 +72,7 @@ DMRA    = b'DMRA'
 #Bridge Control commands
 BC      = b'BC'
 BCKA    = b'BCKA'
+BCSQ    = b'BCSQ'
 
 # Higheset peer ID permitted by HBP
 PEER_MAX = 4294967295

hblink.py

@@ -116,7 +116,7 @@ class OPENBRIDGE(DatagramProtocol):
 
     def startProtocol(self):
         if self._config['ENHANCED_OBP']:
-            self._bcka = task.LoopingCall(self.send_bcka)
+            self._bcka = task.LoopingCall(self.send_bcka())
             self._bcka = self._bcka.start(10)
 
     def dereg(self):
@@ -132,7 +132,7 @@ class OPENBRIDGE(DatagramProtocol):
             # 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)
+            logger.error('(%s) OpenBridge system was asked to send non DMRD packet with send_system(): %s', self._system, _packet)
             
     def send_bcka(self):
         _packet = BCKA
@@ -140,6 +140,13 @@ class OPENBRIDGE(DatagramProtocol):
         self.transport.write(_packet, (self._config['TARGET_IP'], self._config['TARGET_PORT']))
         logger.debug('(%s) *BridgeControl* sent Keep Alive',self._system)
         
+    def send_bcsq(self,_tgid,_stream_id):
+        _packet = b''.join([BCSQ, _tgid, _stream_id])
+        _packet = b''.join([_packet, (hmac_new(self._config['PASSPHRASE'],_packet,sha1).digest())])
+        self.transport.write(_packet, (self._config['TARGET_IP'], self._config['TARGET_PORT']))
+        logger.debug('(%s) *BridgeControl* sent Source Quench, TG: %s, Stream ID: %s',self._system,int_id(_tgid), int_id(_stream_id))
+    
+
     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))
@@ -209,6 +216,7 @@ class OPENBRIDGE(DatagramProtocol):
 
         if self._config['ENHANCED_OBP']:
             if _packet[:2] == BC:    # Bridge Control packet (Extended OBP)
+                #Keep Alive
                 if _packet[:4] == BCKA:
                     #_data = _packet[:53]
                     _hash = _packet[4:]
@@ -218,7 +226,7 @@ class OPENBRIDGE(DatagramProtocol):
                         self._config['_bcka'] = time()
                         if _sockaddr != self._config['TARGET_SOCK']:
                             h,p =  _sockaddr
-                            logger.info('(%s) *BridgeControl* Source IP and Port has changed for OBP from %s:%s to %s:%s,  updating',self._system,self._config['TARGET_IP'],self._config['TARGET_port'],h,p)
+                            logger.info('(%s) *BridgeControl* Source IP and Port has changed for OBP from %s:%s to %s:%s,  updating',self._system,self._config['TARGET_IP'],self._config['TARGET_PORT'],h,p)
                             self._config['TARGET_IP'] = h
                             self._config['TARGET_PORT'] = p
                             self._config['TARGET_SOCK'] = (h,p)
@@ -226,6 +234,23 @@ class OPENBRIDGE(DatagramProtocol):
                     else:
                         h,p = _sockaddr
                         logger.info('(%s) *BridgeControl* BCKA invalid KeepAlive, packet discarded - OPCODE: %s DATA: %s HMAC LENGTH: %s HMAC: %s SRC IP: %s SRC PORT: %s', self._system, _packet[:4], repr(_packet[:53]), len(_packet[53:]), repr(_packet[53:]),h,p) 
+                #Source Quench
+                if _packet[:4] == BCSQ:
+                    #_data = _packet[:11]
+                    _hash = _packet[11:]
+                    _tgid = _packet[4:7]
+                    _stream_id = _packet[7:11]
+                    _ckhs = hmac_new(self._config['PASSPHRASE'],_packet[:11],sha1).digest()
+                    if compare_digest(_hash, _ckhs):
+                        logger.info('(%s) *BridgeControl* Source Quench request received for TGID: %s, Stream ID: %s',self._system,int_id(_tgid), int_id(_stream_id))
+                        if '_bcsq' not in self._config:
+                            self._config['_bcsq'] = {}
+                        self._config['_bcsq'][_tgid] = _stream_id
+                    else:
+                        h,p = _sockaddr
+                        logger.info('(%s) *BridgeControl* BCSQ invalid Source Quench, packet discarded - OPCODE: %s DATA: %s HMAC LENGTH: %s HMAC: %s SRC IP: %s SRC PORT: %s', self._system, _packet[:4], repr(_packet[:53]), len(_packet[53:]), repr(_packet[53:]),h,p)  
+                
+                    
       
 #************************************************
 #     HB MASTER CLASS