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tcprelay.py
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tcprelay.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# tcprelay.py - TCP connection relay for usbmuxd
#
# Copyright (C) 2009 Hector Martin "marcan" <[email protected]>
#
# 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 or version 3.
#
# 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 usbmux
import SocketServer
import select
from optparse import OptionParser
import sys
import threading
class SocketRelay(object):
def __init__(self, a, b, maxbuf=65535):
self.a = a
self.b = b
self.atob = ""
self.btoa = ""
self.maxbuf = maxbuf
def handle(self):
while True:
rlist = []
wlist = []
xlist = [self.a, self.b]
if self.atob:
wlist.append(self.b)
if self.btoa:
wlist.append(self.a)
if len(self.atob) < self.maxbuf:
rlist.append(self.a)
if len(self.btoa) < self.maxbuf:
rlist.append(self.b)
rlo, wlo, xlo = select.select(rlist, wlist, xlist)
if xlo:
return
if self.a in wlo:
n = self.a.send(self.btoa)
self.btoa = self.btoa[n:]
if self.b in wlo:
n = self.b.send(self.atob)
self.atob = self.atob[n:]
if self.a in rlo:
s = self.a.recv(self.maxbuf - len(self.atob))
if not s:
return
self.atob += s
if self.b in rlo:
s = self.b.recv(self.maxbuf - len(self.btoa))
if not s:
return
self.btoa += s
#print "Relay iter: %8d atob, %8d btoa, lists: %r %r %r"%(len(self.atob), len(self.btoa), rlo, wlo, xlo)
class TCPRelay(SocketServer.BaseRequestHandler):
def handle(self):
print "Incoming connection to %d"%self.server.server_address[1]
mux = usbmux.USBMux(options.sockpath)
print "Discovering devices..."
devcount = len(mux.devices)
while True:
mux.process(0.1)
cnt = len(mux.devices)
if cnt > devcount:
devcount = cnt
else:
break
if not mux.devices:
print "No devices found"
self.request.close()
return
# select a device
dev=None
if self.server.device:
for d in mux.devices:
if d.serial == self.server.device:
dev = d
break
if not dev:
print "Unable to find device: %s" % self.server.device
self.request.close()
return
else:
dev = mux.devices[0]
print "Connecting to device %s"%str(dev)
dsock = mux.connect(dev, self.server.rport)
lsock = self.request
print "Connection established, relaying data"
try:
fwd = SocketRelay(dsock, lsock, self.server.bufsize * 1024)
fwd.handle()
finally:
dsock.close()
lsock.close()
print "Connection closed"
class TCPServer(SocketServer.TCPServer):
allow_reuse_address = True
device = None
class ThreadedTCPServer(SocketServer.ThreadingMixIn, TCPServer):
pass
def do_list():
mux = usbmux.USBMux()
print "Listing devices..."
devcount = len(mux.devices)
while True:
mux.process(0.1)
cnt = len(mux.devices)
if cnt > devcount:
devcount = cnt
else:
break
for dev in mux.devices:
print dev
HOST = "localhost"
parser = OptionParser(usage="usage: %prog [OPTIONS] RemotePort[:LocalPort][-UDID] [RemotePort[:LocalPort][-UDID]...")
parser.add_option("-t", "--threaded", dest='threaded', action='store_true', default=False, help="use threading to handle multiple connections at once")
parser.add_option("-l", "--list", dest='list', action='store_true', default=False, help="list attached devices")
parser.add_option("-b", "--bufsize", dest='bufsize', action='store', metavar='KILOBYTES', type='int', default=128, help="specify buffer size for socket forwarding")
parser.add_option("-s", "--socket", dest='sockpath', action='store', metavar='PATH', type='str', default=None, help="specify the path of the usbmuxd socket")
parser.add_option("-c", "--config", dest='config', action='store', metavar='CONFIG', type='str', default=None, help="specify config file for relays")
options, args = parser.parse_args()
serverclass = TCPServer
if options.threaded:
serverclass = ThreadedTCPServer
if options.list:
do_list()
sys.exit(0)
if options.config:
f = open(options.config)
args += f.readlines()
f.close
if len(args) == 0:
parser.print_help()
sys.exit(1)
ports = []
for arg in args:
arg = arg.rstrip("\n")
try:
dev = None
if '-' in arg:
arg, dev = arg.split('-')
if ':' in arg:
rport, lport = arg.split(":")
rport = int(rport)
lport = int(lport)
ports.append((rport, lport, dev))
else:
ports.append((int(arg), int(arg)))
except:
parser.print_help()
sys.exit(1)
servers=[]
for rport, lport, dev in ports:
print "Forwarding local port %d to remote port %d on device %s"%(lport, rport, dev)
server = serverclass((HOST, lport), TCPRelay)
server.rport = rport
server.device = dev
server.bufsize = options.bufsize
servers.append(server)
alive = True
while alive:
try:
rl, wl, xl = select.select(servers, [], [])
for server in rl:
server.handle_request()
except:
alive = False