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add hotspot proxy from FreeDMR

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KF7EEL 2021-05-28 11:10:24 -07:00
parent 979fedb218
commit 20444b7de0
2 changed files with 222 additions and 0 deletions
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16
full_bridge-SAMPLE.cfg
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@ -301,6 +301,22 @@ SUB_ACL: DENY:1
TGID_TS1_ACL: PERMIT:ALL
TGID_TS2_ACL: PERMIT:ALL
# Utilizing the hotspot proxy from FreeDMR
##[PROXY_TEMPLATE]
##STATIC_APRS_POSITION_ENABLED: False
##REPEAT: True
##PASSPHRASE: password
##GROUP_HANGTIME: 5
##USE_ACL: True
##REG_ACL: DENY:1
##SUB_ACL: DENY:1
##TGID_TS1_ACL: PERMIT:ALL
##TGID_TS2_ACL: PERMIT:ALL
# PEER INSTANCES - DUPLICATE SECTION FOR MULTIPLE PEERS
# There are a LOT of errors in the HB Protocol specifications on this one!
# MOST of these items are just strings and will be properly dealt with by the program

206
hotspot_proxy_v2.py Normal file
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@ -0,0 +1,206 @@
from twisted.internet.protocol import DatagramProtocol
from twisted.internet import reactor, task
from time import time
from resettabletimer import ResettableTimer
from dmr_utils3.utils import int_id
import random
# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
__author__ = 'Simon Adlem - G7RZU'
__copyright__ = 'Copyright (c) Simon Adlem, G7RZU 2020,2021'
__credits__ = 'Jon Lee, G4TSN; Norman Williams, M6NBP'
__license__ = 'GNU GPLv3'
__maintainer__ = 'Simon Adlem G7RZU'
__email__ = 'simon@gb7fr.org.uk'
class Proxy(DatagramProtocol):
def __init__(self,Master,ListenPort,connTrack,blackList,Timeout,Debug,DestportStart,DestPortEnd):
self.master = Master
self.connTrack = connTrack
self.peerTrack = {}
self.timeout = Timeout
self.debug = Debug
self.blackList = blackList
self.destPortStart = DestportStart
self.destPortEnd = DestPortEnd
self.numPorts = DestPortEnd - DestportStart
def reaper(self,_peer_id):
if self.debug:
print("dead",_peer_id)
self.transport.write(b'RPTCL'+_peer_id, ('127.0.0.1',self.peerTrack[_peer_id]['dport']))
self.connTrack[self.peerTrack[_peer_id]['dport']] = False
del self.peerTrack[_peer_id]
def datagramReceived(self, data, addr):
# HomeBrew Protocol Commands
DMRD = b'DMRD'
DMRA = b'DMRA'
MSTCL = b'MSTCL'
MSTNAK = b'MSTNAK'
MSTPONG = b'MSTPONG'
MSTN = b'MSTN'
MSTP = b'MSTP'
MSTC = b'MSTC'
RPTL = b'RPTL'
RPTPING = b'RPTPING'
RPTCL = b'RPTCL'
RPTL = b'RPTL'
RPTACK = b'RPTACK'
RPTK = b'RPTK'
RPTC = b'RPTC'
RPTP = b'RPTP'
RPTA = b'RPTA'
RPTO = b'RPTO'
host,port = addr
nowtime = time()
Debug = self.debug
print(host)
print(self.master)
#If the packet comes from the master
if host == self.master:
_command = data[:4]
if _command == DMRD:
_peer_id = data[11:15]
elif _command == RPTA:
if data[6:10] in self.peerTrack:
_peer_id = data[6:10]
else:
_peer_id = self.connTrack[port]
elif _command == MSTN:
_peer_id = data[6:10]
self.peerTrack[_peer_id]['timer'].cancel()
self.reaper(_peer_id)
return
elif _command == MSTP:
_peer_id = data[7:11]
elif _command == MSTC:
_peer_id = data[5:9]
self.peerTrack[_peer_id]['timer'].cancel()
self.reaper(_peer_id)
return
# _peer_id = self.connTrack[port]
if self.debug:
print(data)
if _peer_id and _peer_id in self.peerTrack:
self.transport.write(data,(self.peerTrack[_peer_id]['shost'],self.peerTrack[_peer_id]['sport']))
#self.peerTrack[_peer_id]['timer'].reset()
return
else:
_command = data[:4]
if _command == DMRD: # DMRData -- encapsulated DMR data frame
_peer_id = data[11:15]
elif _command == DMRA: # DMRAlias -- Talker Alias information
_peer_id = _data[4:8]
elif _command == RPTL: # RPTLogin -- a repeater wants to login
_peer_id = data[4:8]
elif _command == RPTK: # Repeater has answered our login challenge
_peer_id = data[4:8]
elif _command == RPTC: # Repeater is sending it's configuraiton OR disconnecting
if data[:5] == RPTCL: # Disconnect command
_peer_id = data[5:9]
else:
_peer_id = data[4:8] # Configure Command
elif _command == RPTO: # options
_peer_id = data[4:8]
elif _command == RPTP: # RPTPing -- peer is pinging us
_peer_id = data[7:11]
else:
return
if _peer_id in self.peerTrack:
_dport = self.peerTrack[_peer_id]['dport']
self.peerTrack[_peer_id]['sport'] = port
self.peerTrack[_peer_id]['shost'] = host
self.transport.write(data, ('127.0.0.1',_dport))
self.peerTrack[_peer_id]['timer'].reset()
if self.debug:
print(data)
print(_dport)
return
else:
if int_id(_peer_id) in self.blackList:
return
#for _dport in self.connTrack:
while True:
_dport = random.randint(1,(self.numPorts - 1))
_dport = _dport + self.destPortStart
if not self.connTrack[_dport]:
break
self.connTrack[_dport] = _peer_id
self.peerTrack[_peer_id] = {}
self.peerTrack[_peer_id]['dport'] = _dport
self.peerTrack[_peer_id]['sport'] = port
self.peerTrack[_peer_id]['shost'] = host
self.peerTrack[_peer_id]['timer'] = ResettableTimer(self.timeout,self.reaper,[_peer_id])
self.peerTrack[_peer_id]['timer'].start()
self.transport.write(data, (self.master,_dport))
if self.debug:
print(data)
return
if __name__ == '__main__':
#*** CONFIG HERE ***
Master = "127.0.0.1"
ListenPort = 62031
DestportStart = 54000
DestPortEnd = 54002
Timeout = 30
Stats = True
Debug = True
BlackList = [1234567]
#*******************
CONNTRACK = {}
for port in range(DestportStart,DestPortEnd+1,1):
CONNTRACK[port] = False
reactor.listenUDP(ListenPort,Proxy(Master,ListenPort,CONNTRACK,BlackList,Timeout,Debug,DestportStart,DestPortEnd))
def loopingErrHandle(failure):
print('(GLOBAL) STOPPING REACTOR TO AVOID MEMORY LEAK: Unhandled error innowtimed loop.\n {}'.format(failure))
reactor.stop()
def stats():
count = 0
nowtime = time()
for port in CONNTRACK:
if CONNTRACK[port]:
count = count+1
totalPorts = DestPortEnd - DestportStart
freePorts = totalPorts - count
print("{} ports out of {} in use ({} free)".format(count,totalPorts,freePorts))
if Stats == True:
stats_task = task.LoopingCall(stats)
statsa = stats_task.start(30)
statsa.addErrback(loopingErrHandle)
reactor.run()