Peter Surda
e309a1edb3
- separate queue for processing blocking stuff on reception - rewrote write buffer as a queue - some addr handling - number of half open connections correct
105 lines
3.7 KiB
Python
105 lines
3.7 KiB
Python
import socket
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import struct
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from advanceddispatcher import AdvancedDispatcher
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import asyncore_pollchoose as asyncore
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from proxy import Proxy, ProxyError, GeneralProxyError
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class Socks4aError(ProxyError): pass
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class Socks4a(Proxy):
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def __init__(self, address=None):
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Proxy.__init__(self, address)
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self.ipaddr = None
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self.destport = address[1]
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def state_init(self):
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self.set_state("auth_done", 0)
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def state_pre_connect(self):
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if not self.read_buf_sufficient(8):
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return False
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# Get the response
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if self.read_buf[0:1] != chr(0x00).encode():
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# bad data
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self.close()
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raise Socks4aError
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elif self.read_buf[1:2] != chr(0x5A).encode():
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# Connection failed
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self.close()
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if ord(self.read_buf[1:2]) in (91, 92, 93):
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# socks 4 erro
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raise Socks4aError
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#raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])-90]))
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else:
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raise Socks4aError
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#raise Socks4aError((94, _socks4aerrors[4]))
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# Get the bound address/port
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self.boundport = struct.unpack(">H", self.read_buf[2:4])[0]
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self.boundaddr = self.read_buf[4:]
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self.__proxysockname = (self.boundaddr, self.boundport)
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if self.ipaddr != None:
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self.__proxypeername = (socket.inet_ntoa(self.ipaddr), self.destination[1])
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else:
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self.__proxypeername = (self.destination[0], self.destport)
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self.set_state("socks_handshake_done", 8)
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def proxy_sock_name(self):
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return socket.inet_ntoa(self.__proxysockname[0])
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def state_socks_handshake_done(self):
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return False
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class Socks4aConnection(Socks4a):
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def __init__(self, address):
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Socks4a.__init__(self, address=address)
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def state_auth_done(self):
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# Now we can request the actual connection
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rmtrslv = False
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self.writeQueue.put(struct.pack('>BBH', 0x04, 0x01, self.destination[1]))
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# If the given destination address is an IP address, we'll
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# use the IPv4 address request even if remote resolving was specified.
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try:
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self.ipaddr = socket.inet_aton(self.destination[0])
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self.writeQueue.put(self.ipaddr)
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except socket.error:
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# Well it's not an IP number, so it's probably a DNS name.
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if Proxy._remote_dns:
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# Resolve remotely
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rmtrslv = True
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self.ipaddr = None
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self.writeQueue.put(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
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else:
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# Resolve locally
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self.ipaddr = socket.inet_aton(socket.gethostbyname(self.destination[0]))
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self.writeQueue.put(self.ipaddr)
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if self._auth:
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self.writeQueue.put(self._auth[0])
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self.writeQueue.put(chr(0x00).encode())
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if rmtrslv:
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self.writeQueue.put(self.destination[0] + chr(0x00).encode())
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self.set_state("pre_connect", 0)
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class Socks4aResolver(Socks4a):
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def __init__(self, host):
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self.host = host
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self.port = 8444
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Socks4a.__init__(self, address=(self.host, self.port))
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def state_auth_done(self):
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# Now we can request the actual connection
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self.writeQueue.put(struct.pack('>BBH', 0x04, 0xF0, self.destination[1]))
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self.writeQueue.put(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
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if self._auth:
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self.writeQueue.put(self._auth[0])
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self.writeQueue.put(chr(0x00).encode())
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self.writeQueue.put(self.host + chr(0x00).encode())
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self.set_state("pre_connect", 0)
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def resolved(self):
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print "Resolved %s as %s" % (self.host, self.proxy_sock_name())
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