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proxy.py
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proxy.py
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import sys
import socket
import threading
def hexdump(src, length=16):
result = []
digits = 4 if isinstance(src, unicode) else 2
for i in xrange(0, len(src), length):
s = src[i:i+length]
hexa = b' '.join(["%0*X" % (digits, ord(x)) for x in s])
text = b''.join([x if 0x20 <= ord(x) < 0x7F else b'.' for x in s])
result.append( b"%04X %-*s %s" % (i, length*(digits + 1), hexa, text) )
print b'\n'.join(result)
def receive_from(connection):
buffer = ""
connection.settimeout(2)
try:
while True:
data = connection.recv(4096)
if not data:
break
buffer += data
except:
pass
return buffer
def request_handler(buffer):
return buffer
def response_handler(buffer):
return buffer
def proxy_handler(client_socket, remote_host, remote_port, receive_first):
remote_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
remote_socket.connect((remote_host, remote_port))
if receive_first:
remote_buffer = receive_from(remote_socket)
hexdump(remote_buffer)
remote_buffer = response_handler(remote_buffer)
if len(remote_buffer):
print "[<==] Sending %d bytes to localhost." % len(remote_buffer)
client_socket.send(remote_buffer)
while True:
local_buffer = receive_from(client_socket)
if len(local_buffer):
print "[==>] Received %d bytes from localhost." % len(local_buffer)
hexdump(local_buffer)
local_buffer = request_handler(local_buffer)
remote_socket.send(local_buffer)
print "[==>] Sent to remote."
remote_buffer = receive_from(remote_socket)
if len(remote_buffer):
print "[<==] Received %d bytes from remote." % len(remote_buffer)
hexdump(remote_buffer)
remote_buffer = response_handler(remote_buffer)
remote_socket.send(remote_buffer)
print "[<==] Sent to localhost."
if not len(local_buffer) or not len(remote_buffer):
client_socket.close()
remote_socket.close()
print "[*] No more data. Closing connections."
break
def server_loop(local_host, local_port, remote_host, remote_port, receive_first):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
server.bind((local_host, local_port))
except Exception as e:
print "[!!] Failed to listen on %s:%d" % (local_host, local_port)
print "[!!] Check for other listening sockets or correct permissions."
print "[!!] Exception: %s" % e
sys.exit(0)
server.listen(5)
while True:
client_socket, addr = server.accept()
proxy_thread = threading.Thread(target=proxy_handler, args=(client_socket, remote_host, remote_port, receive_first))
proxy_thread.start()
def main():
if len(sys.argv[1:]) != 5:
print "Usage: ./proxy.py [localhost] [localport] [remotehost] [remoteport] [receive_first]"
print "Example: ./proxy.py 127.0.0.1 9000 10.12.132.1 9000 True"
sys.exit(0)
local_host = sys.argv[1]
local_port = int(sys.argv[2])
remote_host = sys.argv[3]
remote_port = int(sys.argv[4])
receive_first = sys.argv[5]
if "True" in receive_first:
receive_first = True
else:
receive_first = False
server_loop(local_host, local_port, remote_host, remote_port, receive_first)
main()