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import sys | ||
import optparse | ||
import socket | ||
import select | ||
import errno | ||
import pytun | ||
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class TunnelServer(object): | ||
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def __init__(self, taddr, tmask, tmtu, laddr, lport, raddr, rport): | ||
self._tap = pytun.TunTapDevice(flags=pytun.IFF_TAP|pytun.IFF_NO_PI) | ||
self._tap.addr = taddr | ||
self._tap.netmask = tmask | ||
self._tap.mtu = tmtu | ||
self._tap.up() | ||
self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | ||
self._sock.bind((laddr, lport)) | ||
self._raddr = raddr | ||
self._rport = rport | ||
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def run(self): | ||
mtu = self._tap.mtu | ||
r = [self._tap, self._sock]; w = []; x = [] | ||
to_tap = '' | ||
to_sock = '' | ||
while True: | ||
try: | ||
r, w, x = select.select(r, w, x) | ||
if self._tap in r: | ||
to_sock = self._tap.read(mtu) | ||
if self._sock in r: | ||
to_tap, addr = self._sock.recvfrom(65535) | ||
if addr[0] != self._raddr or addr[1] != self._rport: | ||
to_tap = '' # drop packet | ||
if self._tap in w: | ||
self._tap.write(to_tap) | ||
to_tap = '' | ||
if self._sock in w: | ||
self._sock.sendto(to_sock, (self._raddr, self._rport)) | ||
to_sock = '' | ||
r = []; w = [] | ||
if to_tap: | ||
w.append(self._tap) | ||
else: | ||
r.append(self._sock) | ||
if to_sock: | ||
w.append(self._sock) | ||
else: | ||
r.append(self._tap) | ||
except (select.error, socket.error, pytun.Error), e: | ||
if e[0] == errno.EINTR: | ||
continue | ||
print >> sys.stderr, str(e) | ||
break | ||
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def main(): | ||
parser = optparse.OptionParser() | ||
parser.add_option('--tap-addr', dest='taddr', | ||
help='set tunnel local address') | ||
parser.add_option('--tap-netmask', default='255.255.255.0',dest='tmask', | ||
help='set tunnel netmask') | ||
parser.add_option('--tap-mtu', type='int', default=1500,dest='tmtu', | ||
help='set tunnel MTU') | ||
parser.add_option('--local-addr', default='0.0.0.0', dest='laddr', | ||
help='set local address [%default]') | ||
parser.add_option('--local-port', type='int', default=12000, dest='lport', | ||
help='set local port [%default]') | ||
parser.add_option('--remote-addr', dest='raddr', | ||
help='set remote address') | ||
parser.add_option('--remote-port', type='int', dest='rport', | ||
help='set remote port') | ||
opt, args = parser.parse_args() | ||
if not (opt.taddr and opt.raddr and opt.rport): | ||
parser.print_help() | ||
return 1 | ||
try: | ||
server = TunnelServer(opt.taddr, opt.tmask, opt.tmtu, opt.laddr, | ||
opt.lport, opt.raddr, opt.rport) | ||
except (pytun.Error, socket.error), e: | ||
print >> sys.stderr, str(e) | ||
return 1 | ||
server.run() | ||
return 0 | ||
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if __name__ == '__main__': | ||
sys.exit(main()) | ||
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,90 @@ | ||
import sys | ||
import optparse | ||
import socket | ||
import select | ||
import errno | ||
import pytun | ||
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||
class TunnelServer(object): | ||
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def __init__(self, taddr, tdstaddr, tmask, tmtu, laddr, lport, raddr, rport): | ||
self._tun = pytun.TunTapDevice(flags=pytun.IFF_TUN|pytun.IFF_NO_PI) | ||
self._tun.addr = taddr | ||
self._tun.dstaddr = tdstaddr | ||
self._tun.netmask = tmask | ||
self._tun.mtu = tmtu | ||
self._tun.up() | ||
self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | ||
self._sock.bind((laddr, lport)) | ||
self._raddr = raddr | ||
self._rport = rport | ||
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def run(self): | ||
mtu = self._tun.mtu | ||
r = [self._tun, self._sock]; w = []; x = [] | ||
to_tun = '' | ||
to_sock = '' | ||
while True: | ||
try: | ||
r, w, x = select.select(r, w, x) | ||
if self._tun in r: | ||
to_sock = self._tun.read(mtu) | ||
if self._sock in r: | ||
to_tun, addr = self._sock.recvfrom(65535) | ||
if addr[0] != self._raddr or addr[1] != self._rport: | ||
to_tun = '' # drop packet | ||
if self._tun in w: | ||
self._tun.write(to_tun) | ||
to_tun = '' | ||
if self._sock in w: | ||
self._sock.sendto(to_sock, (self._raddr, self._rport)) | ||
to_sock = '' | ||
r = []; w = [] | ||
if to_tun: | ||
w.append(self._tun) | ||
else: | ||
r.append(self._sock) | ||
if to_sock: | ||
w.append(self._sock) | ||
else: | ||
r.append(self._tun) | ||
except (select.error, socket.error, pytun.Error), e: | ||
if e[0] == errno.EINTR: | ||
continue | ||
print >> sys.stderr, str(e) | ||
break | ||
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def main(): | ||
parser = optparse.OptionParser() | ||
parser.add_option('--tun-addr', dest='taddr', | ||
help='set tunnel local address') | ||
parser.add_option('--tun-dstaddr', dest='tdstaddr', | ||
help='set tunnel destination address') | ||
parser.add_option('--tun-netmask', default='255.255.255.0',dest='tmask', | ||
help='set tunnel netmask') | ||
parser.add_option('--tun-mtu', type='int', default=1500,dest='tmtu', | ||
help='set tunnel MTU') | ||
parser.add_option('--local-addr', default='0.0.0.0', dest='laddr', | ||
help='set local address [%default]') | ||
parser.add_option('--local-port', type='int', default=12000, dest='lport', | ||
help='set local port [%default]') | ||
parser.add_option('--remote-addr', dest='raddr', | ||
help='set remote address') | ||
parser.add_option('--remote-port', type='int', dest='rport', | ||
help='set remote port') | ||
opt, args = parser.parse_args() | ||
if not (opt.taddr and opt.tdstaddr and opt.raddr and opt.rport): | ||
parser.print_help() | ||
return 1 | ||
try: | ||
server = TunnelServer(opt.taddr, opt.tdstaddr, opt.tmask, opt.tmtu, | ||
opt.laddr, opt.lport, opt.raddr, opt.rport) | ||
except (pytun.Error, socket.error), e: | ||
print >> sys.stderr, str(e) | ||
return 1 | ||
server.run() | ||
return 0 | ||
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if __name__ == '__main__': | ||
sys.exit(main()) | ||
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