mirror of
https://github.com/sshuttle/sshuttle.git
synced 2024-11-22 07:53:43 +01:00
87 lines
2.5 KiB
Python
Executable File
87 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python
|
|
import sys, os, socket, select, struct, time
|
|
|
|
listener = socket.socket()
|
|
listener.bind(('127.0.0.1', 0))
|
|
listener.listen(500)
|
|
|
|
servers = []
|
|
clients = []
|
|
remain = {}
|
|
|
|
NUMCLIENTS = 50
|
|
count = 0
|
|
|
|
|
|
while 1:
|
|
if len(clients) < NUMCLIENTS:
|
|
c = socket.socket()
|
|
c.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
c.bind(('0.0.0.0', 0))
|
|
c.connect(listener.getsockname())
|
|
count += 1
|
|
if count >= 16384:
|
|
count = 1
|
|
print 'cli CREATING %d' % count
|
|
b = struct.pack('I', count) + 'x'*count
|
|
remain[c] = count
|
|
print 'cli >> %r' % len(b)
|
|
c.send(b)
|
|
c.shutdown(socket.SHUT_WR)
|
|
clients.append(c)
|
|
r = [listener]
|
|
time.sleep(0.1)
|
|
else:
|
|
r = [listener]+servers+clients
|
|
print 'select(%d)' % len(r)
|
|
r,w,x = select.select(r, [], [], 5)
|
|
assert(r)
|
|
for i in r:
|
|
if i == listener:
|
|
s,addr = listener.accept()
|
|
servers.append(s)
|
|
elif i in servers:
|
|
b = i.recv(4096)
|
|
print 'srv << %r' % len(b)
|
|
if not i in remain:
|
|
assert(len(b) >= 4)
|
|
want = struct.unpack('I', b[:4])[0]
|
|
b = b[4:]
|
|
#i.send('y'*want)
|
|
else:
|
|
want = remain[i]
|
|
if want < len(b):
|
|
print 'weird wanted %d bytes, got %d: %r' % (want, len(b), b)
|
|
assert(want >= len(b))
|
|
want -= len(b)
|
|
remain[i] = want
|
|
if not b: # EOF
|
|
if want:
|
|
print 'weird: eof but wanted %d more' % want
|
|
assert(want == 0)
|
|
i.close()
|
|
servers.remove(i)
|
|
del remain[i]
|
|
else:
|
|
print 'srv >> %r' % len(b)
|
|
i.send('y'*len(b))
|
|
if not want:
|
|
i.shutdown(socket.SHUT_WR)
|
|
elif i in clients:
|
|
b = i.recv(4096)
|
|
print 'cli << %r' % len(b)
|
|
want = remain[i]
|
|
if want < len(b):
|
|
print 'weird wanted %d bytes, got %d: %r' % (want, len(b), b)
|
|
assert(want >= len(b))
|
|
want -= len(b)
|
|
remain[i] = want
|
|
if not b: # EOF
|
|
if want:
|
|
print 'weird: eof but wanted %d more' % want
|
|
assert(want == 0)
|
|
i.close()
|
|
clients.remove(i)
|
|
del remain[i]
|
|
listener.accept()
|