diff options
Diffstat (limited to 'sleekxmpp')
| -rw-r--r-- | sleekxmpp/plugins/__init__.py | 1 | ||||
| -rw-r--r-- | sleekxmpp/plugins/xep_0065/__init__.py | 5 | ||||
| -rw-r--r-- | sleekxmpp/plugins/xep_0065/proxy.py | 359 | ||||
| -rw-r--r-- | sleekxmpp/plugins/xep_0065/stanza.py | 41 | ||||
| -rw-r--r-- | sleekxmpp/thirdparty/__init__.py | 1 | ||||
| -rw-r--r-- | sleekxmpp/thirdparty/socks.py | 382 |
6 files changed, 789 insertions, 0 deletions
diff --git a/sleekxmpp/plugins/__init__.py b/sleekxmpp/plugins/__init__.py index 59d716eb..c6617a87 100644 --- a/sleekxmpp/plugins/__init__.py +++ b/sleekxmpp/plugins/__init__.py @@ -30,6 +30,7 @@ __all__ = [ 'xep_0054', # vcard-temp 'xep_0059', # Result Set Management 'xep_0060', # Pubsub (Client) + 'xep_0065', # SOCKS5 Bytestreams 'xep_0066', # Out of Band Data 'xep_0077', # In-Band Registration # 'xep_0078', # Non-SASL auth. Don't automatically load diff --git a/sleekxmpp/plugins/xep_0065/__init__.py b/sleekxmpp/plugins/xep_0065/__init__.py new file mode 100644 index 00000000..c577d859 --- /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..b027e4e0 --- /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 + +from sleekxmpp.plugins.xep_0065 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 as 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 502be6b6..2a1db717 100644 --- a/sleekxmpp/thirdparty/__init__.py +++ b/sleekxmpp/thirdparty/__init__.py @@ -8,4 +8,5 @@ try: except: from sleekxmpp.thirdparty.gnupg import GPG +from sleekxmpp.thirdparty import 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])) |