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socks5.py
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socks5.py
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# -*- coding: utf-8 -*-
# requirement:python2
# Author: Youchao Feng
# Last modified:
# Email:
# Filename: main
# Description:
# ******************************************************
from SocketServer import BaseServer, ThreadingTCPServer, StreamRequestHandler
from socket import socket, AF_INET, SOCK_STREAM
import logging
import signal
import struct
import sys
import thread
import os
import platform
__author__ = 'Youchao Feng'
support_os = ('Darwin', 'Linux')
current_os = platform.system()
def byte_to_int(b):
"""
Convert Unsigned byte to int
:param b: byte value
:return: int value
"""
return b & 0xFF
def port_from_byte(b1, b2):
"""
:param b1: First byte of port
:param b2: Second byte of port
:return: Port in Int
"""
return byte_to_int(b1) << 8 | byte_to_int(b2)
def host_from_ip(a, b, c, d):
a = byte_to_int(a)
b = byte_to_int(b)
c = byte_to_int(c)
d = byte_to_int(d)
return "%d.%d.%d.%d" % (a, b, c, d)
def get_command_name(value):
"""
Gets command name by value
:param value: value of Command
:return: Command Name
"""
if value == 1:
return 'CONNECT'
elif value == 2:
return 'BIND'
elif value == 3:
return 'UDP_ASSOCIATE'
else:
return None
def build_command_response(reply):
start = b'\x05%s\x00\x01\x00\x00\x00\x00\x00\x00'
return start % reply.get_byte_string()
def close_session(session):
session.get_client_socket().close()
logging.info("Session[%s] closed" % session.get_id())
def run_daemon_process(stdout='/dev/null', stderr=None, stdin='/dev/null',
pid_file=None, start_msg='started with pid %s'):
"""
This forks the current process into a daemon.
The stdin, stdout, and stderr arguments are file names that
will be opened and be used to replace the standard file descriptors
in sys.stdin, sys.stdout, and sys.stderr.
These arguments are optional and default to /dev/null.
Note that stderr is opened unbuffered, so
if it shares a file with stdout then interleaved output
may not appear in the order that you expect.
"""
# flush io
sys.stdout.flush()
sys.stderr.flush()
# Do first fork.
try:
if os.fork() > 0:
sys.exit(0) # Exit first parent.
except OSError, e:
sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror))
sys.exit(1)
# Decouple from parent environment.
os.chdir("/")
os.umask(0)
os.setsid()
# Do second fork.
try:
if os.fork() > 0:
sys.exit(0) # Exit second parent.
except OSError, e:
sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror))
sys.exit(1)
# Open file descriptors and print start message
if not stderr:
stderr = stdout
si = file(stdin, 'r')
so = file(stdout, 'a+')
se = file(stderr, 'a+', 0) # unbuffered
pid = str(os.getpid())
sys.stderr.write(start_msg % pid)
sys.stderr.flush()
if pid_file:
file(pid_file, 'w+').write("%s\n" % pid)
# Redirect standard file descriptors.
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
class Session(object):
index = 0
def __init__(self, client_socket):
Session.index += 1
self.__id = Session.index
self.__client_socket = client_socket
self._attr = {}
def get_id(self):
return self.__id
def set_attr(self, key, value):
self._attr[key] = value
def get_client_socket(self):
return self.__client_socket
class AddressType(object):
IPV4 = 1
DOMAIN_NAME = 3
IPV6 = 4
class SocksCommand(object):
CONNECT = 1
BIND = 2
UDP_ASSOCIATE = 3
class SocksMethod(object):
NO_AUTHENTICATION_REQUIRED = 0
GSS_API = 1
USERNAME_PASSWORD = 2
class ServerReply(object):
def __init__(self, value):
self.__value = value
def get_byte_string(self):
if self.__value == 0:
return b'\x00'
elif self.__value == 1:
return b'\x01'
elif self.__value == 2:
return b'\x02'
elif self.__value == 3:
return b'\x03'
elif self.__value == 4:
return b'\x04'
elif self.__value == 5:
return b'\x05'
elif self.__value == 6:
return b'\x06'
elif self.__value == 7:
return b'\x07'
elif self.__value == 8:
return b'\x08'
def get_value(self):
return self.__value
class ReplyType(object):
SUCCEEDED = ServerReply(0)
GENERAL_SOCKS_SERVER_FAILURE = ServerReply(1)
CONNECTION_NOT_ALLOWED_BY_RULESET = ServerReply(2)
NETWORK_UNREACHABLE = ServerReply(3)
HOST_UNREACHABLE = ServerReply(4)
CONNECTION_REFUSED = ServerReply(5)
TTL_EXPIRED = ServerReply(6)
COMMAND_NOT_SUPPORTED = ServerReply(7)
ADDRESS_TYPE_NOT_SUPPORTED = ServerReply(8)
class SocketPipe(object):
BUFFER_SIZE = 1024 * 1024
def __init__(self, socket1, socket2):
self._socket1 = socket1
self._socket2 = socket2
self.__running = False
def __transfer(self, socket1, socket2):
while self.__running:
try:
data = socket1.recv(self.BUFFER_SIZE)
if len(data) > 0:
socket2.sendall(data)
else:
break
except IOError:
self.stop()
self.stop()
def start(self):
self.__running = True
thread.start_new_thread(self.__transfer, (self._socket1, self._socket2))
thread.start_new_thread(self.__transfer, (self._socket2, self._socket1))
def stop(self):
self._socket1.close()
self._socket2.close()
self.__running = False
def is_running(self):
return self.__running
class CommandExecutor(object):
def __init__(self, remote_server_host, remote_server_port, session):
self.__proxy_socket = socket(AF_INET, SOCK_STREAM)
self.__remote_server_host = remote_server_host
self.__remote_server_port = remote_server_port
self.__client = session.get_client_socket()
self.__session = session
def do_connect(self):
"""
Do SOCKS CONNECT method
:return: None
"""
result = self.__proxy_socket.connect_ex(self.__get_address())
if result == 0:
self.__client.send(build_command_response(ReplyType.SUCCEEDED))
socket_pipe = SocketPipe(self.__client, self.__proxy_socket)
socket_pipe.start()
while socket_pipe.is_running():
pass
elif result == 60:
self.__client.send(build_command_response(ReplyType.TTL_EXPIRED))
elif result == 61:
self.__client.send(build_command_response(ReplyType.NETWORK_UNREACHABLE))
else:
logging.error('Connection Error:[%s] is unknown' % result)
self.__client.send(build_command_response(ReplyType.NETWORK_UNREACHABLE))
def do_bind(self):
pass
def do_udp_associate(self):
pass
def __get_address(self):
return self.__remote_server_host, self.__remote_server_port
class User(object):
def __init__(self, username, password):
self.__username = username
self.__password = password
def get_username(self):
return self.__username
def get_password(self):
return self.__password
def __repr__(self):
return '<user: username=%s, password=%s>' % (self.get_username(), self.__password)
class UserManager(object):
def __init__(self):
self.__users = {}
def add_user(self, user):
self.__users[user.get_username()] = user
def remove_user(self, username):
if username in self.__users:
del self.__users[username]
def check(self, username, password):
if username in self.__users and self.__users[username].get_password() == password:
return True
else:
return False
def get_user(self, username):
return self.__users[username]
def get_users(self):
return self.__users
class Socks5RequestHandler(StreamRequestHandler):
def __init__(self, request, client_address, server):
StreamRequestHandler.__init__(self, request, client_address, server)
def handle(self):
session = Session(self.connection)
logging.info('Create session[%s] for %s:%d' % (
1, self.client_address[0], self.client_address[1]))
print self.server.allowed
if self.server.allowed and self.client_address[0] not in self.server.allowed:
close_session(session)
return
client = self.connection
client.recv(1)
method_num, = struct.unpack('b', client.recv(1))
methods = struct.unpack('b' * method_num, client.recv(method_num))
auth = self.server.is_auth()
if methods.__contains__(SocksMethod.NO_AUTHENTICATION_REQUIRED) and not auth:
client.send(b"\x05\x00")
elif methods.__contains__(SocksMethod.USERNAME_PASSWORD) and auth:
client.send(b"\x05\x02")
if not self.__do_username_password_auth():
logging.info('Session[%d] authentication failed' % session.get_id())
close_session(session)
return
else:
client.send(b"\x05\xFF")
return
version, command, reserved, address_type = struct.unpack('b' * 4, client.recv(4))
host = None
port = None
if address_type == AddressType.IPV4:
ip_a, ip_b, ip_c, ip_d, p1, p2 = struct.unpack('b' * 6, client.recv(6))
host = host_from_ip(ip_a, ip_b, ip_c, ip_d)
port = port_from_byte(p1, p2)
elif address_type == AddressType.DOMAIN_NAME:
host_length, = struct.unpack('b', client.recv(1))
host = client.recv(host_length)
p1, p2 = struct.unpack('b' * 2, client.recv(2))
port = port_from_byte(p1, p2)
else: # address type not support
client.send(build_command_response(ReplyType.ADDRESS_TYPE_NOT_SUPPORTED))
command_executor = CommandExecutor(host, port, session)
if command == SocksCommand.CONNECT:
logging.info("Session[%s] Request connect %s:%d" % (session.get_id(), host, port))
command_executor.do_connect()
close_session(session)
def __do_username_password_auth(self):
client = self.connection
client.recv(1)
length = byte_to_int(struct.unpack('b', client.recv(1))[0])
username = client.recv(length)
length = byte_to_int(struct.unpack('b', client.recv(1))[0])
password = client.recv(length)
user_manager = self.server.get_user_manager()
if user_manager.check(username, password):
client.send(b"\x01\x00")
return True
else:
client.send(b"\x01\x01")
return False
class Socks5Server(ThreadingTCPServer):
"""
SOCKS5 proxy server
"""
def __init__(self, port, auth=False, user_manager=UserManager(), allowed=None):
ThreadingTCPServer.__init__(self, ('', port), Socks5RequestHandler)
self.__port = port
self.__users = {}
self.__auth = auth
self.__user_manager = user_manager
self.__sessions = {}
self.allowed = allowed
def serve_forever(self, poll_interval=0.5):
logging.info("Create SOCKS5 server at port %d" % self.__port)
ThreadingTCPServer.serve_forever(self, poll_interval)
def finish_request(self, request, client_address):
BaseServer.finish_request(self, request, client_address)
def is_auth(self):
return self.__auth
def set_auth(self, auth):
self.__auth = auth
def get_all_managed_session(self):
return self.__sessions
def get_bind_port(self):
return self.__port
def get_user_manager(self):
return self.__user_manager
def set_user_manager(self, user_manager):
self.__user_manager = user_manager
def show_help():
print 'Usage: start|stop|restart|status [options]'
print 'Options:'
print ' --port=<val> Sets server port, default 1080'
print ' --log=true|false Logging on, default true'
print ' --allowed=IP set allowed IP list'
print ' --auth:<user:pwd> Use username/password authentication'
print ' Example:'
print ' Create user \"admin\" with password \"1234\":'
print ' --auth=admin:1234 '
print ' Create tow users:'
print ' --auth=admin:1234,root:1234'
print ' -h Show Help'
def check_os_support():
if not support_os.__contains__(current_os):
print 'Not support in %s' % current_os
sys.exit()
def stop(pid_file):
check_os_support()
print 'Stopping server...',
try:
f = open(pid_file, 'r')
pid = int(f.readline())
os.kill(pid, signal.SIGTERM)
os.remove(pid_file)
print " [OK]"
except IOError:
print "pysocks is not running"
except OSError:
print "pysocks is not running"
def status(pid_file):
check_os_support()
try:
f = open(pid_file, 'r')
pid = int(f.readline())
print 'pysocks(pid %d) is running...' % pid
except IOError:
print "pysocks is stopped"
def main():
port = 1080
enable_log = True
log_file = 'socks.log'
auth = False
user_home = os.path.expanduser('~')
pid_file = user_home + '/.pysocks.pid'
user_manager = UserManager()
allowed_ips = None
if sys.argv.__len__() < 2:
show_help()
sys.exit()
command = sys.argv[1]
if command == 'start':
pass
elif command == 'stop':
stop(pid_file)
sys.exit()
elif command == 'restart':
stop(pid_file)
elif command == 'status':
status(pid_file)
sys.exit()
else:
show_help()
sys.exit()
for arg in sys.argv[2:]:
if arg.startswith('--port='):
try:
port = int(arg.split('=')[1])
except ValueError:
print '--port=<val> <val> should be a number'
sys.exit()
elif arg.startswith('--auth'):
auth = True
users = arg.split('=')[1]
for user in users.split(','):
user_pwd = user.split(':')
user_manager.add_user(User(user_pwd[0], user_pwd[1]))
elif arg == '-h':
show_help()
sys.exit()
elif arg.startswith('--log='):
value = arg.split('=')[1]
if value == 'true':
enable_log = True
elif value == 'false':
enable_log = False
else:
print '--log=<val> <val> should be true or false'
sys.exit()
elif arg.startswith('--allowed='):
value = arg.split('=')[1]
allowed_ips = value.split(',')
else:
print 'Unknown argument:%s' % arg
sys.exit()
if enable_log:
logging.basicConfig(level=logging.INFO,
format='%(asctime)s %(levelname)s - %(message)s',
filename=log_file,
filemode='a')
console = logging.StreamHandler(sys.stdout)
console.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s %(levelname)-5s %(lineno)-3d - %(message)s')
console.setFormatter(formatter)
logging.getLogger().addHandler(console)
Socks5Server.allow_reuse_address = True
socks5_server = Socks5Server(port, auth, user_manager, allowed=allowed_ips)
try:
if support_os.__contains__(current_os):
run_daemon_process(pid_file=pid_file, start_msg='Start SOCKS5 server at pid %s\n')
socks5_server.serve_forever()
except KeyboardInterrupt:
socks5_server.server_close()
socks5_server.shutdown()
logging.info("SOCKS5 server shutdown")
if __name__ == '__main__':
main()