Merge pull request #169 from SeyZ/develop

xep_0065 plugin (Socks5 Bytestreams)

7 files changed, 816 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 2c491a83..e7f6bd09 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ docs/_build/
 .tox/
 .coverage
 sleekxmpp.egg-info/
+.ropeproject/
diff --git a/LICENSE b/LICENSE
index a868b337..8809b2d2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -69,8 +69,8 @@ modification, are permitted provided that the following conditions are met:
     * Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
-    * Neither the name of Red Innovation nor the names of its contributors 
-      may be used to endorse or promote products derived from this software 
+    * Neither the name of Red Innovation nor the names of its contributors
+      may be used to endorse or promote products derived from this software
       without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY RED INNOVATION ``AS IS'' AND ANY
@@ -167,3 +167,28 @@ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+socksipy: A Python SOCKS client module.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Copyright 2006 Dan-Haim. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+3. Neither the name of Dan Haim nor the names of his contributors may be used
+   to endorse or promote products derived from this software without specific
+   prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY DAN HAIM "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL DAN HAIM OR HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMANGE.
diff --git a/sleekxmpp/plugins/xep_0065/__init__.py b/sleekxmpp/plugins/xep_0065/__init__.py
new file mode 100644
index 00000000..e1066005
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0065/__init__.py
@@ -0,0 +1,5 @@
+from sleekxmpp.plugins.base import register_plugin
+from sleekxmpp.plugins.xep_0065.proxy import xep_0065
+
+
+register_plugin(xep_0065)
diff --git a/sleekxmpp/plugins/xep_0065/proxy.py b/sleekxmpp/plugins/xep_0065/proxy.py
new file mode 100644
index 00000000..4fdd2ad8
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0065/proxy.py
@@ -0,0 +1,359 @@
+import sys
+import logging
+import struct
+
+from threading import Thread, Event
+from hashlib import sha1
+from select import select
+from uuid import uuid4
+
+import stanza
+
+from sleekxmpp.plugins.base import base_plugin
+from sleekxmpp.xmlstream.handler import Callback
+from sleekxmpp.xmlstream.matcher import StanzaPath
+from sleekxmpp.thirdparty.socks import socksocket, PROXY_TYPE_SOCKS5
+
+# Registers the sleekxmpp logger
+log = logging.getLogger(__name__)
+
+
+class xep_0065(base_plugin):
+    """
+    XEP-0065 Socks5 Bytestreams
+    """
+
+    description = "Socks5 Bytestreams"
+    dependencies = set(['xep_0030', ])
+    xep = '0065'
+    name = 'xep_0065'
+
+    # A dict contains for each SID, the proxy thread currently
+    # running.
+    proxy_threads = {}
+
+    def plugin_init(self):
+        """ Initializes the xep_0065 plugin and all event callbacks.
+        """
+
+        # Shortcuts to access to the xep_0030 plugin.
+        self.disco = self.xmpp['xep_0030']
+
+        # Handler for the streamhost stanza.
+        self.xmpp.registerHandler(
+            Callback('Socks5 Bytestreams',
+                     StanzaPath('iq@type=set/socks/streamhost'),
+                     self._handle_streamhost))
+
+        # Handler for the streamhost-used stanza.
+        self.xmpp.registerHandler(
+            Callback('Socks5 Bytestreams',
+                     StanzaPath('iq@type=result/socks/streamhost-used'),
+                     self._handle_streamhost_used))
+
+    def get_socket(self, sid):
+        """ Returns the socket associated to the SID.
+        """
+
+        proxy = self.proxy_threads.get(sid)
+        if proxy:
+            return proxy.s
+
+    def handshake(self, to, streamer=None):
+        """ Starts the handshake to establish the socks5 bytestreams
+        connection.
+        """
+
+        # Discovers the proxy.
+        self.streamer = streamer or self.discover_proxy()
+
+        # Requester requests network address from the proxy.
+        streamhost = self.get_network_address(self.streamer)
+        self.proxy_host = streamhost['socks']['streamhost']['host']
+        self.proxy_port = streamhost['socks']['streamhost']['port']
+
+        # Generates the SID for this new handshake.
+        sid = uuid4().hex
+
+        # Requester initiates S5B negotation with Target by sending
+        # IQ-set that includes the JabberID and network address of
+        # StreamHost as well as the StreamID (SID) of the proposed
+        # bytestream.
+        iq = self.xmpp.Iq(sto=to, stype='set')
+        iq['socks']['sid'] = sid
+        iq['socks']['streamhost']['jid'] = self.streamer
+        iq['socks']['streamhost']['host'] = self.proxy_host
+        iq['socks']['streamhost']['port'] = self.proxy_port
+
+        # Sends the new IQ.
+        return iq.send()
+
+    def discover_proxy(self):
+        """ Auto-discovers (using XEP 0030) the available bytestream
+        proxy on the XMPP server.
+
+        Returns the JID of the proxy.
+        """
+
+        # Gets all disco items.
+        disco_items = self.disco.get_items(self.xmpp.server)
+
+        for item in disco_items['disco_items']['items']:
+            # For each items, gets the disco info.
+            disco_info = self.disco.get_info(item[0])
+
+            # Gets and verifies if the identity is a bytestream proxy.
+            identities = disco_info['disco_info']['identities']
+            for identity in identities:
+                if identity[0] == 'proxy' and identity[1] == 'bytestreams':
+                    # Returns when the first occurence is found.
+                    return '%s' % disco_info['from']
+
+    def get_network_address(self, streamer):
+        """ Gets the streamhost information of the proxy.
+
+        streamer : The jid of the proxy.
+        """
+
+        iq = self.xmpp.Iq(sto=streamer, stype='get')
+        iq['socks']  # Adds the query eleme to the iq.
+
+        return iq.send()
+
+    def _handle_streamhost(self, iq):
+        """ Handles all streamhost stanzas.
+        """
+
+        # Registers the streamhost info.
+        self.streamer = iq['socks']['streamhost']['jid']
+        self.proxy_host = iq['socks']['streamhost']['host']
+        self.proxy_port = iq['socks']['streamhost']['port']
+
+        # Sets the SID, the requester and the target.
+        sid = iq['socks']['sid']
+        requester = '%s' % iq['from']
+        target = '%s' % self.xmpp.boundjid
+
+        # Next the Target attempts to open a standard TCP socket on
+        # the network address of the Proxy.
+        self.proxy_thread = Proxy(sid, requester, target, self.proxy_host,
+                                  self.proxy_port, self.on_recv)
+        self.proxy_thread.start()
+
+        # Registers the new thread in the proxy_thread dict.
+        self.proxy_threads[sid] = self.proxy_thread
+
+        # Wait until the proxy is connected
+        self.proxy_thread.connected.wait()
+
+        # Replies to the incoming iq with a streamhost-used stanza.
+        res_iq = iq.reply()
+        res_iq['socks']['sid'] = sid
+        res_iq['socks']['streamhost-used']['jid'] = self.streamer
+
+        # Sends the IQ
+        return res_iq.send()
+
+    def _handle_streamhost_used(self, iq):
+        """ Handles all streamhost-used stanzas.
+        """
+
+        # Sets the SID, the requester and the target.
+        sid = iq['socks']['sid']
+        requester = '%s' % self.xmpp.boundjid
+        target  = '%s' % iq['from']
+
+        # The Requester will establish a connection to the SOCKS5
+        # proxy in the same way the Target did.
+        self.proxy_thread = Proxy(sid, requester, target, self.proxy_host,
+                                  self.proxy_port, self.on_recv)
+        self.proxy_thread.start()
+
+        # Registers the new thread in the proxy_thread dict.
+        self.proxy_threads[sid] = self.proxy_thread
+
+        # Wait until the proxy is connected
+        self.proxy_thread.connected.wait()
+
+        # Requester sends IQ-set to StreamHost requesting that
+        # StreamHost activate the bytestream associated with the
+        # StreamID.
+        self.activate(iq['socks']['sid'], target)
+
+    def activate(self, sid, to):
+        """ IQ-set to StreamHost requesting that StreamHost activate
+        the bytestream associated with the StreamID.
+        """
+
+        # Creates the activate IQ.
+        act_iq = self.xmpp.Iq(sto=self.streamer, stype='set')
+        act_iq['socks']['sid'] = sid
+        act_iq['socks']['activate'] = to
+
+        # Send the IQ.
+        act_iq.send()
+
+    def deactivate(self, sid):
+        """ Closes the Proxy thread associated to this SID.
+        """
+
+        proxy = self.proxy_threads.get(sid)
+        if proxy:
+            proxy.s.close()
+            del self.proxy_threads[sid]
+
+    def close(self):
+        """ Closes all Proxy threads.
+        """
+
+        for sid, proxy in self.proxy_threads.items():
+            proxy.s.close()
+            del self.proxy_threads[sid]
+
+    def send(self, sid, data):
+        """ Sends the data over the Proxy socket associated to the
+        SID.
+        """
+
+        proxy = self.proxy_threads.get(sid)
+        if proxy:
+            proxy.s.sendall(data)
+
+    def on_recv(self, sid, data):
+        """ Calls when data is recv from the Proxy socket associated
+        to the SID.
+
+        Triggers a socks_closed event if the socket is closed. The sid
+        is passed to this event.
+
+        Triggers a socks_recv event if there's available data. A dict
+        that contains the sid and the data is passed to this event.
+        """
+
+        proxy = self.proxy_threads.get(sid)
+        if proxy:
+            if not data:
+                self.xmpp.event('socks_closed', sid)
+            else:
+                self.xmpp.event('socks_recv', {'sid': sid, 'data': data})
+
+
+class Proxy(Thread):
+    """ Establishes in a thread a connection between the client and
+    the server-side Socks5 proxy.
+    """
+
+    def __init__(self, sid, requester, target, proxy, proxy_port,
+                 on_recv):
+        """ Initializes the proxy thread.
+
+        sid        : The StreamID. <str>
+        requester  : The JID of the requester. <str>
+        target     : The JID of the target. <str>
+        proxy_host : The hostname or the IP of the proxy. <str>
+        proxy_port : The port of the proxy. <str> or <int>
+        on_recv    : A callback called when data are received from the
+                     socket. <Callable>
+        """
+
+        # Initializes the thread.
+        Thread.__init__(self)
+
+        # Because the xep_0065 plugin uses the proxy_port as string,
+        # the Proxy class accepts the proxy_port argument as a string
+        # or an integer. Here, we force to use the port as an integer.
+        proxy_port = int(proxy_port)
+
+        # Creates a connected event to warn when to proxy is
+        # connected.
+        self.connected = Event()
+
+        # Registers the arguments.
+        self.sid = sid
+        self.requester = requester
+        self.target = target
+        self.proxy = proxy
+        self.proxy_port = proxy_port
+        self.on_recv = on_recv
+
+    def run(self):
+        """ Starts the thread.
+        """
+
+        # Creates the socks5 proxy socket
+        self.s = socksocket()
+        self.s.setproxy(PROXY_TYPE_SOCKS5, self.proxy, port=self.proxy_port)
+
+        # The hostname MUST be SHA1(SID + Requester JID + Target JID)
+        # where the output is hexadecimal-encoded (not binary).
+        digest = sha1()
+        digest.update(self.sid)  # SID
+        digest.update(self.requester)  # Requester JID
+        digest.update(self.target)  # Target JID
+
+        # Computes the digest in hex.
+        dest = '%s' % digest.hexdigest()
+
+        # The port MUST be 0.
+        self.s.connect((dest, 0))
+        log.info('Socket connected.')
+        self.connected.set()
+
+        # Blocks until the socket need to be closed.
+        self.listen()
+
+        # Closes the socket.
+        self.s.close()
+        log.info('Socket closed.')
+
+    def listen(self):
+        """ Listen for data on the socket. When receiving data, call
+        the callback on_recv callable.
+        """
+
+        socket_open = True
+        while socket_open:
+            ins = []
+            try:
+                # Wait any read available data on socket. Timeout
+                # after 5 secs.
+                ins, out, err = select([self.s, ], [], [], 5)
+            except Exception, e:
+                # There's an error with the socket (maybe the socket
+                # has been closed and the file descriptor is bad).
+                log.debug('Socket error: %s' % e)
+                break
+
+            for s in ins:
+                data = self.recv_size(self.s)
+                if not data:
+                    socket_open = False
+
+                self.on_recv(self.sid, data)
+
+    def recv_size(self, the_socket):
+        total_len = 0
+        total_data = []
+        size = sys.maxint
+        size_data = sock_data = ''
+        recv_size = 8192
+
+        while total_len < size:
+            sock_data = the_socket.recv(recv_size)
+            if not sock_data:
+                return ''.join(total_data)
+
+            if not total_data:
+                if len(sock_data) > 4:
+                    size_data += sock_data
+                    size = struct.unpack('>i', size_data[:4])[0]
+                    recv_size = size
+                    if recv_size > 524288:
+                        recv_size = 524288
+                    total_data.append(size_data[4:])
+                else:
+                    size_data += sock_data
+            else:
+                total_data.append(sock_data)
+            total_len = sum([len(i) for i in total_data])
+        return ''.join(total_data)
diff --git a/sleekxmpp/plugins/xep_0065/stanza.py b/sleekxmpp/plugins/xep_0065/stanza.py
new file mode 100644
index 00000000..ae57aba8
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0065/stanza.py
@@ -0,0 +1,41 @@
+from sleekxmpp import Iq
+from sleekxmpp.xmlstream import ElementBase, register_stanza_plugin
+
+
+# The protocol namespace defined in the Socks5Bytestream (0065) spec.
+namespace = 'http://jabber.org/protocol/bytestreams'
+
+
+class StreamHost(ElementBase):
+    """ The streamhost xml element.
+    """
+
+    namespace = namespace
+    name = 'streamhost'
+    plugin_attrib = 'streamhost'
+    interfaces = set(('host', 'jid', 'port'))
+
+
+class StreamHostUsed(ElementBase):
+    """ The streamhost-used xml element.
+    """
+
+    namespace = namespace
+    name = 'streamhost-used'
+    plugin_attrib = 'streamhost-used'
+    interfaces = set(('jid',))
+
+
+class Socks5(ElementBase):
+    """ The query xml element.
+    """
+
+    namespace = namespace
+    name = 'query'
+    plugin_attrib = 'socks'
+    interfaces = set(('sid', 'activate'))
+    sub_interfaces = set(('activate',))
+
+register_stanza_plugin(Iq, Socks5)
+register_stanza_plugin(Socks5, StreamHost)
+register_stanza_plugin(Socks5, StreamHostUsed)
diff --git a/sleekxmpp/thirdparty/__init__.py b/sleekxmpp/thirdparty/__init__.py
index b9c82a7f..7ec045a6 100644
--- a/sleekxmpp/thirdparty/__init__.py
+++ b/sleekxmpp/thirdparty/__init__.py
@@ -8,5 +8,5 @@ try:
 except:
     from sleekxmpp.thirdparty.gnupg import GPG
 
-from sleekxmpp.thirdparty import suelta
+from sleekxmpp.thirdparty import suelta, socks
 from sleekxmpp.thirdparty.mini_dateutil import tzutc, tzoffset, parse_iso
diff --git a/sleekxmpp/thirdparty/socks.py b/sleekxmpp/thirdparty/socks.py
new file mode 100644
index 00000000..a6c0d70e
--- /dev/null
+++ b/sleekxmpp/thirdparty/socks.py
@@ -0,0 +1,382 @@
+"""SocksiPy - Python SOCKS module.
+Version 1.00
+
+Copyright 2006 Dan-Haim. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+3. Neither the name of Dan Haim nor the names of his contributors may be used
+   to endorse or promote products derived from this software without specific
+   prior written permission.
+   
+THIS SOFTWARE IS PROVIDED BY DAN HAIM "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL DAN HAIM OR HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMANGE.
+
+
+This module provides a standard socket-like interface for Python
+for tunneling connections through SOCKS proxies.
+
+"""
+
+"""
+
+Minor modifications made by Christopher Gilbert (http://motomastyle.com/)
+for use in PyLoris (http://pyloris.sourceforge.net/)
+
+Minor modifications made by Mario Vilas (http://breakingcode.wordpress.com/)
+mainly to merge bug fixes found in Sourceforge
+
+"""
+
+import socket
+import struct
+import sys
+
+PROXY_TYPE_SOCKS4 = 1
+PROXY_TYPE_SOCKS5 = 2
+PROXY_TYPE_HTTP = 3
+
+_defaultproxy = None
+_orgsocket = socket.socket
+
+class ProxyError(Exception): pass
+class GeneralProxyError(ProxyError): pass
+class Socks5AuthError(ProxyError): pass
+class Socks5Error(ProxyError): pass
+class Socks4Error(ProxyError): pass
+class HTTPError(ProxyError): pass
+
+_generalerrors = ("success",
+    "invalid data",
+    "not connected",
+    "not available",
+    "bad proxy type",
+    "bad input")
+
+_socks5errors = ("succeeded",
+    "general SOCKS server failure",
+    "connection not allowed by ruleset",
+    "Network unreachable",
+    "Host unreachable",
+    "Connection refused",
+    "TTL expired",
+    "Command not supported",
+    "Address type not supported",
+    "Unknown error")
+
+_socks5autherrors = ("succeeded",
+    "authentication is required",
+    "all offered authentication methods were rejected",
+    "unknown username or invalid password",
+    "unknown error")
+
+_socks4errors = ("request granted",
+    "request rejected or failed",
+    "request rejected because SOCKS server cannot connect to identd on the client",
+    "request rejected because the client program and identd report different user-ids",
+    "unknown error")
+
+def setdefaultproxy(proxytype=None, addr=None, port=None, rdns=True, username=None, password=None):
+    """setdefaultproxy(proxytype, addr[, port[, rdns[, username[, password]]]])
+    Sets a default proxy which all further socksocket objects will use,
+    unless explicitly changed.
+    """
+    global _defaultproxy
+    _defaultproxy = (proxytype, addr, port, rdns, username, password)
+
+def wrapmodule(module):
+    """wrapmodule(module)
+    Attempts to replace a module's socket library with a SOCKS socket. Must set
+    a default proxy using setdefaultproxy(...) first.
+    This will only work on modules that import socket directly into the namespace;
+    most of the Python Standard Library falls into this category.
+    """
+    if _defaultproxy != None:
+        module.socket.socket = socksocket
+    else:
+        raise GeneralProxyError((4, "no proxy specified"))
+
+class socksocket(socket.socket):
+    """socksocket([family[, type[, proto]]]) -> socket object
+    Open a SOCKS enabled socket. The parameters are the same as
+    those of the standard socket init. In order for SOCKS to work,
+    you must specify family=AF_INET, type=SOCK_STREAM and proto=0.
+    """
+
+    def __init__(self, family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0, _sock=None):
+        _orgsocket.__init__(self, family, type, proto, _sock)
+        if _defaultproxy != None:
+            self.__proxy = _defaultproxy
+        else:
+            self.__proxy = (None, None, None, None, None, None)
+        self.__proxysockname = None
+        self.__proxypeername = None
+
+    def __recvall(self, count):
+        """__recvall(count) -> data
+        Receive EXACTLY the number of bytes requested from the socket.
+        Blocks until the required number of bytes have been received.
+        """
+        data = self.recv(count)
+        while len(data) < count:
+            d = self.recv(count-len(data))
+            if not d: raise GeneralProxyError((0, "connection closed unexpectedly"))
+            data = data + d
+        return data
+
+    def setproxy(self, proxytype=None, addr=None, port=None, rdns=True, username=None, password=None):
+        """setproxy(proxytype, addr[, port[, rdns[, username[, password]]]])
+        Sets the proxy to be used.
+        proxytype -    The type of the proxy to be used. Three types
+                are supported: PROXY_TYPE_SOCKS4 (including socks4a),
+                PROXY_TYPE_SOCKS5 and PROXY_TYPE_HTTP
+        addr -        The address of the server (IP or DNS).
+        port -        The port of the server. Defaults to 1080 for SOCKS
+                servers and 8080 for HTTP proxy servers.
+        rdns -        Should DNS queries be preformed on the remote side
+                (rather than the local side). The default is True.
+                Note: This has no effect with SOCKS4 servers.
+        username -    Username to authenticate with to the server.
+                The default is no authentication.
+        password -    Password to authenticate with to the server.
+                Only relevant when username is also provided.
+        """
+        self.__proxy = (proxytype, addr, port, rdns, username, password)
+
+    def __negotiatesocks5(self, destaddr, destport):
+        """__negotiatesocks5(self,destaddr,destport)
+        Negotiates a connection through a SOCKS5 server.
+        """
+        # First we'll send the authentication packages we support.
+        if (self.__proxy[4]!=None) and (self.__proxy[5]!=None):
+            # The username/password details were supplied to the
+            # setproxy method so we support the USERNAME/PASSWORD
+            # authentication (in addition to the standard none).
+            self.sendall(struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02))
+        else:
+            # No username/password were entered, therefore we
+            # only support connections with no authentication.
+            self.sendall(struct.pack('BBB', 0x05, 0x01, 0x00))
+        # We'll receive the server's response to determine which
+        # method was selected
+        chosenauth = self.__recvall(2)
+        if chosenauth[0:1] != chr(0x05).encode():
+            self.close()
+            raise GeneralProxyError((1, _generalerrors[1]))
+        # Check the chosen authentication method
+        if chosenauth[1:2] == chr(0x00).encode():
+            # No authentication is required
+            pass
+        elif chosenauth[1:2] == chr(0x02).encode():
+            # Okay, we need to perform a basic username/password
+            # authentication.
+            self.sendall(chr(0x01).encode() + chr(len(self.__proxy[4])) + self.__proxy[4] + chr(len(self.__proxy[5])) + self.__proxy[5])
+            authstat = self.__recvall(2)
+            if authstat[0:1] != chr(0x01).encode():
+                # Bad response
+                self.close()
+                raise GeneralProxyError((1, _generalerrors[1]))
+            if authstat[1:2] != chr(0x00).encode():
+                # Authentication failed
+                self.close()
+                raise Socks5AuthError((3, _socks5autherrors[3]))
+            # Authentication succeeded
+        else:
+            # Reaching here is always bad
+            self.close()
+            if chosenauth[1] == chr(0xFF).encode():
+                raise Socks5AuthError((2, _socks5autherrors[2]))
+            else:
+                raise GeneralProxyError((1, _generalerrors[1]))
+        # Now we can request the actual connection
+        req = struct.pack('BBB', 0x05, 0x01, 0x00)
+        # If the given destination address is an IP address, we'll
+        # use the IPv4 address request even if remote resolving was specified.
+        try:
+            ipaddr = socket.inet_aton(destaddr)
+            req = req + chr(0x01).encode() + ipaddr
+        except socket.error:
+            # Well it's not an IP number,  so it's probably a DNS name.
+            if self.__proxy[3]:
+                # Resolve remotely
+                ipaddr = None
+                req = req + chr(0x03).encode() + chr(len(destaddr)).encode() + destaddr
+            else:
+                # Resolve locally
+                ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
+                req = req + chr(0x01).encode() + ipaddr
+        req = req + struct.pack(">H", destport)
+        self.sendall(req)
+        # Get the response
+        resp = self.__recvall(4)
+        if resp[0:1] != chr(0x05).encode():
+            self.close()
+            raise GeneralProxyError((1, _generalerrors[1]))
+        elif resp[1:2] != chr(0x00).encode():
+            # Connection failed
+            self.close()
+            if ord(resp[1:2])<=8:
+                raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])]))
+            else:
+                raise Socks5Error((9, _socks5errors[9]))
+        # Get the bound address/port
+        elif resp[3:4] == chr(0x01).encode():
+            boundaddr = self.__recvall(4)
+        elif resp[3:4] == chr(0x03).encode():
+            resp = resp + self.recv(1)
+            boundaddr = self.__recvall(ord(resp[4:5]))
+        else:
+            self.close()
+            raise GeneralProxyError((1,_generalerrors[1]))
+        boundport = struct.unpack(">H", self.__recvall(2))[0]
+        self.__proxysockname = (boundaddr, boundport)
+        if ipaddr != None:
+            self.__proxypeername = (socket.inet_ntoa(ipaddr), destport)
+        else:
+            self.__proxypeername = (destaddr, destport)
+
+    def getproxysockname(self):
+        """getsockname() -> address info
+        Returns the bound IP address and port number at the proxy.
+        """
+        return self.__proxysockname
+
+    def getproxypeername(self):
+        """getproxypeername() -> address info
+        Returns the IP and port number of the proxy.
+        """
+        return _orgsocket.getpeername(self)
+
+    def getpeername(self):
+        """getpeername() -> address info
+        Returns the IP address and port number of the destination
+        machine (note: getproxypeername returns the proxy)
+        """
+        return self.__proxypeername
+
+    def __negotiatesocks4(self,destaddr,destport):
+        """__negotiatesocks4(self,destaddr,destport)
+        Negotiates a connection through a SOCKS4 server.
+        """
+        # Check if the destination address provided is an IP address
+        rmtrslv = False
+        try:
+            ipaddr = socket.inet_aton(destaddr)
+        except socket.error:
+            # It's a DNS name. Check where it should be resolved.
+            if self.__proxy[3]:
+                ipaddr = struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01)
+                rmtrslv = True
+            else:
+                ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
+        # Construct the request packet
+        req = struct.pack(">BBH", 0x04, 0x01, destport) + ipaddr
+        # The username parameter is considered userid for SOCKS4
+        if self.__proxy[4] != None:
+            req = req + self.__proxy[4]
+        req = req + chr(0x00).encode()
+        # DNS name if remote resolving is required
+        # NOTE: This is actually an extension to the SOCKS4 protocol
+        # called SOCKS4A and may not be supported in all cases.
+        if rmtrslv:
+            req = req + destaddr + chr(0x00).encode()
+        self.sendall(req)
+        # Get the response from the server
+        resp = self.__recvall(8)
+        if resp[0:1] != chr(0x00).encode():
+            # Bad data
+            self.close()
+            raise GeneralProxyError((1,_generalerrors[1]))
+        if resp[1:2] != chr(0x5A).encode():
+            # Server returned an error
+            self.close()
+            if ord(resp[1:2]) in (91, 92, 93):
+                self.close()
+                raise Socks4Error((ord(resp[1:2]), _socks4errors[ord(resp[1:2]) - 90]))
+            else:
+                raise Socks4Error((94, _socks4errors[4]))
+        # Get the bound address/port
+        self.__proxysockname = (socket.inet_ntoa(resp[4:]), struct.unpack(">H", resp[2:4])[0])
+        if rmtrslv != None:
+            self.__proxypeername = (socket.inet_ntoa(ipaddr), destport)
+        else:
+            self.__proxypeername = (destaddr, destport)
+
+    def __negotiatehttp(self, destaddr, destport):
+        """__negotiatehttp(self,destaddr,destport)
+        Negotiates a connection through an HTTP server.
+        """
+        # If we need to resolve locally, we do this now
+        if not self.__proxy[3]:
+            addr = socket.gethostbyname(destaddr)
+        else:
+            addr = destaddr
+        self.sendall(("CONNECT " + addr + ":" + str(destport) + " HTTP/1.1\r\n" + "Host: " + destaddr + "\r\n\r\n").encode())
+        # We read the response until we get the string "\r\n\r\n"
+        resp = self.recv(1)
+        while resp.find("\r\n\r\n".encode()) == -1:
+            resp = resp + self.recv(1)
+        # We just need the first line to check if the connection
+        # was successful
+        statusline = resp.splitlines()[0].split(" ".encode(), 2)
+        if statusline[0] not in ("HTTP/1.0".encode(), "HTTP/1.1".encode()):
+            self.close()
+            raise GeneralProxyError((1, _generalerrors[1]))
+        try:
+            statuscode = int(statusline[1])
+        except ValueError:
+            self.close()
+            raise GeneralProxyError((1, _generalerrors[1]))
+        if statuscode != 200:
+            self.close()
+            raise HTTPError((statuscode, statusline[2]))
+        self.__proxysockname = ("0.0.0.0", 0)
+        self.__proxypeername = (addr, destport)
+
+    def connect(self, destpair):
+        """connect(self, despair)
+        Connects to the specified destination through a proxy.
+        destpar - A tuple of the IP/DNS address and the port number.
+        (identical to socket's connect).
+        To select the proxy server use setproxy().
+        """
+        # Do a minimal input check first
+        if (not type(destpair) in (list,tuple)) or (len(destpair) < 2) or (type(destpair[0]) != type('')) or (type(destpair[1]) != int):
+            raise GeneralProxyError((5, _generalerrors[5]))
+        if self.__proxy[0] == PROXY_TYPE_SOCKS5:
+            if self.__proxy[2] != None:
+                portnum = self.__proxy[2]
+            else:
+                portnum = 1080
+            _orgsocket.connect(self, (self.__proxy[1], portnum))
+            self.__negotiatesocks5(destpair[0], destpair[1])
+        elif self.__proxy[0] == PROXY_TYPE_SOCKS4:
+            if self.__proxy[2] != None:
+                portnum = self.__proxy[2]
+            else:
+                portnum = 1080
+            _orgsocket.connect(self,(self.__proxy[1], portnum))
+            self.__negotiatesocks4(destpair[0], destpair[1])
+        elif self.__proxy[0] == PROXY_TYPE_HTTP:
+            if self.__proxy[2] != None:
+                portnum = self.__proxy[2]
+            else:
+                portnum = 8080
+            _orgsocket.connect(self,(self.__proxy[1], portnum))
+            self.__negotiatehttp(destpair[0], destpair[1])
+        elif self.__proxy[0] == None:
+            _orgsocket.connect(self, (destpair[0], destpair[1]))
+        else:
+            raise GeneralProxyError((4, _generalerrors[4]))