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sms-proxy.py
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/
sms-proxy.py
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################################################################################
#
# Copyright (c) 2013 Ivan Kluchnikov (kluchnikovi@gmail.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 2 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.
#
################################################################################
import sys
import string
import random
import binascii
import sip_parser
from twisted.internet import defer
from twisted.internet import protocol
from twisted.python import log
from twisted.protocols import sip
from smspdu import *
class SIPProxyClientProtocol(sip.Base):
dest_ip = "127.0.0.1"
dest_port = "5062"
src_ip = "127.0.0.1"
src_port = 5063
def __init__(self, sms_queue, sip_queue):
self.sms_queue = sms_queue
self.sip_queue = sip_queue
def __gen_string(self, length):
return ''.join(random.choice(string.letters) for i in xrange(length))
def startProtocol(self):
self.sip_queue.get().addCallback(self.smsServerDataReceived)
def smsServerDataReceived(self, sms):
destURL = sip.URL(self.dest_ip, self.dest_port)
r = sip.Request('MESSAGE', sip.URL(self.dest_ip, sms.recipient))
r.body = sms.user_data
r.addHeader('via', sip.Via(self.dest_ip).toString())
r.addHeader('from', "%s <sip:%s@%s:%s>;tag=%s" % (sms.sender, sms.sender, self.src_ip, self.dest_port, self.__gen_string(6)))
r.addHeader('to', "%s <sip:%s@%s>" % (sms.recipient, sms.recipient, self.dest_ip))
r.addHeader('call-id', (random.randint(100000, 10000000)))
r.addHeader('cseq', "18 MESSAGE")
r.addHeader('content-type', "text/plain")
r.addHeader('content-length', len(r.body))
self.transport.write(r.toString(), (destURL.host, self.src_port))
log.msg("\n[SIP:TX] [Proxy =================> SMSC]\n%s" % r.toString())
self.sip_queue.get().addCallback(self.smsServerDataReceived)
def datagramReceived(self, data, (host, port)):
log.msg("\n[SIP:RX] [Proxy <================ SMSC]\n%s" % data)
msgType, firstLine, headers, body = sip_parser.parseSipMessage(data);
if msgType == "MESSAGE":
hdr_from = headers["from"].split()
hdr_to = headers["to"].split()
sms = SMS_DELIVER.create(hdr_from[0], hdr_to[0], body)
log.msg("Create SMS_DELIVER:\n%s" % sms.dump())
self.sms_queue.put(sms)
# Send 200 OK to SMSC
r = sip.Response(200, "OK")
r.addHeader('via', headers["via"])
r.addHeader('from', headers["from"])
r.addHeader('to', headers["to"])
r.addHeader('call-id', headers["call-id"])
r.addHeader('cseq', headers["cseq"])
r.addHeader("Content-Length", "0")
destURL = sip.URL(self.dest_ip, self.dest_port)
self.transport.write(r.toString(), (destURL.host, self.src_port))
log.msg("\n[SIP:TX] [Proxy ================> SMSC]\n%s" % r.toString())
class SMSProxyServer(protocol.Protocol):
def connectionMade(self):
self.sms_queue = defer.DeferredQueue()
self.sip_queue = defer.DeferredQueue()
self.sms_queue.get().addCallback(self.sipClientDataReceived)
self.sip_client_factory = SIPProxyClientProtocol(self.sms_queue, self.sip_queue)
from twisted.internet import reactor
reactor.listenUDP(5062, self.sip_client_factory)
def sipClientDataReceived(self, sms):
hex_sms = sms.toPDU()
msg = sms.recipient.encode('hex')
addr_len = 30 - len(msg)
while addr_len > 0:
msg = msg + '0'
addr_len = addr_len - 1
msg = msg + hex_sms
data = binascii.a2b_hex(msg)
self.transport.write(data)
log.msg("\n[SMS:TX] [Proxy ===============> BSC]\n%s" % sms.dump())
self.sms_queue.get().addCallback(self.sipClientDataReceived)
def dataReceived(self, data):
data_hex = binascii.b2a_hex(data)
data_received = data_hex.strip()
originator = data_received[:30].decode('hex')
sms = SMS_SUBMIT.fromPDU(data_received[30:], originator.rstrip(' \t\r\n\0'))
log.msg("\n[SMS:RX] [Proxy <=============== BSC]\n%s" % sms.dump())
self.sip_queue.put(sms)
def connectionLost(self, why):
self.sip_queue.put(False)
class SMSProxyServerFactory(protocol.ClientFactory):
protocol = SMSProxyServer
if __name__ == "__main__":
log.startLogging(sys.stdout)
factory = SMSProxyServerFactory()
from twisted.internet import reactor
reactor.connectUNIX("/tmp/bsc_sms", factory)
reactor.run()