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SickGear/lib/socks/socks.py
SickGear e56303798c Change bump to major version 3.xx to signal that this branch supports Python3+ only. 
Initial SickGear for Python 3.
2023-02-09 13:41:15 +00:00

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from base64 import b64encode
try:
from collections.abc import Callable
except ImportError:
from collections import Callable
from errno import EOPNOTSUPP, EINVAL, EAGAIN
import functools
from io import BytesIO
import logging
import os
from os import SEEK_CUR
import socket
import struct
import sys
__version__ = "1.7.1"
if os.name == "nt" and sys.version_info < (3, 0):
try:
import win_inet_pton
except ImportError:
raise ImportError(
"To run PySocks on Windows you must install win_inet_pton")
log = logging.getLogger(__name__)
PROXY_TYPE_SOCKS4 = SOCKS4 = 1
PROXY_TYPE_SOCKS5 = SOCKS5 = 2
PROXY_TYPE_HTTP = HTTP = 3
PROXY_TYPES = {"SOCKS4": SOCKS4, "SOCKS5": SOCKS5, "HTTP": HTTP}
PRINTABLE_PROXY_TYPES = dict(zip(PROXY_TYPES.values(), PROXY_TYPES.keys()))
_orgsocket = _orig_socket = socket.socket
def set_self_blocking(function):
@functools.wraps(function)
def wrapper(*args, **kwargs):
self = args[0]
try:
_is_blocking = self.gettimeout()
if _is_blocking == 0:
self.setblocking(True)
return function(*args, **kwargs)
except Exception as e:
raise
finally:
# set orgin blocking
if _is_blocking == 0:
self.setblocking(False)
return wrapper
class ProxyError(IOError):
"""Socket_err contains original socket.error exception."""
def __init__(self, msg, socket_err=None):
self.msg = msg
self.socket_err = socket_err
if socket_err:
self.msg += ": {}".format(socket_err)
def __str__(self):
return self.msg
class GeneralProxyError(ProxyError):
pass
class ProxyConnectionError(ProxyError):
pass
class SOCKS5AuthError(ProxyError):
pass
class SOCKS5Error(ProxyError):
pass
class SOCKS4Error(ProxyError):
pass
class HTTPError(ProxyError):
pass
SOCKS4_ERRORS = {
0x5B: "Request rejected or failed",
0x5C: ("Request rejected because SOCKS server cannot connect to identd on"
" the client"),
0x5D: ("Request rejected because the client program and identd report"
" different user-ids")
}
SOCKS5_ERRORS = {
0x01: "General SOCKS server failure",
0x02: "Connection not allowed by ruleset",
0x03: "Network unreachable",
0x04: "Host unreachable",
0x05: "Connection refused",
0x06: "TTL expired",
0x07: "Command not supported, or protocol error",
0x08: "Address type not supported"
}
DEFAULT_PORTS = {SOCKS4: 1080, SOCKS5: 1080, HTTP: 8080}
def set_default_proxy(proxy_type=None, addr=None, port=None, rdns=True,
username=None, password=None):
"""Sets a default proxy.
All further socksocket objects will use the default unless explicitly
changed. All parameters are as for socket.set_proxy()."""
socksocket.default_proxy = (proxy_type, addr, port, rdns,
username.encode() if username else None,
password.encode() if password else None)
def setdefaultproxy(*args, **kwargs):
if "proxytype" in kwargs:
kwargs["proxy_type"] = kwargs.pop("proxytype")
return set_default_proxy(*args, **kwargs)
def get_default_proxy():
"""Returns the default proxy, set by set_default_proxy."""
return socksocket.default_proxy
getdefaultproxy = get_default_proxy
def wrap_module(module):
"""Attempts to replace a module's socket library with a SOCKS socket.
Must set a default proxy using set_default_proxy(...) 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 socksocket.default_proxy:
module.socket.socket = socksocket
else:
raise GeneralProxyError("No default proxy specified")
wrapmodule = wrap_module
def create_connection(dest_pair,
timeout=None, source_address=None,
proxy_type=None, proxy_addr=None,
proxy_port=None, proxy_rdns=True,
proxy_username=None, proxy_password=None,
socket_options=None):
"""create_connection(dest_pair, *[, timeout], **proxy_args) -> socket object
Like socket.create_connection(), but connects to proxy
before returning the socket object.
dest_pair - 2-tuple of (IP/hostname, port).
**proxy_args - Same args passed to socksocket.set_proxy() if present.
timeout - Optional socket timeout value, in seconds.
source_address - tuple (host, port) for the socket to bind to as its source
address before connecting (only for compatibility)
"""
# Remove IPv6 brackets on the remote address and proxy address.
remote_host, remote_port = dest_pair
if remote_host.startswith("["):
remote_host = remote_host.strip("[]")
if proxy_addr and proxy_addr.startswith("["):
proxy_addr = proxy_addr.strip("[]")
err = None
# Allow the SOCKS proxy to be on IPv4 or IPv6 addresses.
for r in socket.getaddrinfo(proxy_addr, proxy_port, 0, socket.SOCK_STREAM):
family, socket_type, proto, canonname, sa = r
sock = None
try:
sock = socksocket(family, socket_type, proto)
if socket_options:
for opt in socket_options:
sock.setsockopt(*opt)
if isinstance(timeout, (int, float)):
sock.settimeout(timeout)
if proxy_type:
sock.set_proxy(proxy_type, proxy_addr, proxy_port, proxy_rdns,
proxy_username, proxy_password)
if source_address:
sock.bind(source_address)
sock.connect((remote_host, remote_port))
return sock
except (socket.error, ProxyError) as e:
err = e
if sock:
sock.close()
sock = None
if err:
raise err
raise socket.error("gai returned empty list.")
class _BaseSocket(socket.socket):
"""Allows Python 2 delegated methods such as send() to be overridden."""
def __init__(self, *pos, **kw):
_orig_socket.__init__(self, *pos, **kw)
self._savedmethods = dict()
for name in self._savenames:
self._savedmethods[name] = getattr(self, name)
delattr(self, name) # Allows normal overriding mechanism to work
_savenames = list()
def _makemethod(name):
return lambda self, *pos, **kw: self._savedmethods[name](*pos, **kw)
for name in ("sendto", "send", "recvfrom", "recv"):
method = getattr(_BaseSocket, name, None)
# Determine if the method is not defined the usual way
# as a function in the class.
# Python 2 uses __slots__, so there are descriptors for each method,
# but they are not functions.
if not isinstance(method, Callable):
_BaseSocket._savenames.append(name)
setattr(_BaseSocket, name, _makemethod(name))
class socksocket(_BaseSocket):
"""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 and proto=0.
The "type" argument must be either SOCK_STREAM or SOCK_DGRAM.
"""
default_proxy = None
def __init__(self, family=socket.AF_INET, type=socket.SOCK_STREAM,
proto=0, *args, **kwargs):
if type not in (socket.SOCK_STREAM, socket.SOCK_DGRAM):
msg = "Socket type must be stream or datagram, not {!r}"
raise ValueError(msg.format(type))
super(socksocket, self).__init__(family, type, proto, *args, **kwargs)
self._proxyconn = None # TCP connection to keep UDP relay alive
if self.default_proxy:
self.proxy = self.default_proxy
else:
self.proxy = (None, None, None, None, None, None)
self.proxy_sockname = None
self.proxy_peername = None
self._timeout = None
def _readall(self, file, count):
"""Receive EXACTLY the number of bytes requested from the file object.
Blocks until the required number of bytes have been received."""
data = b""
while len(data) < count:
d = file.read(count - len(data))
if not d:
raise GeneralProxyError("Connection closed unexpectedly")
data += d
return data
def settimeout(self, timeout):
self._timeout = timeout
try:
# test if we're connected, if so apply timeout
peer = self.get_proxy_peername()
super(socksocket, self).settimeout(self._timeout)
except socket.error:
pass
def gettimeout(self):
return self._timeout
def setblocking(self, v):
if v:
self.settimeout(None)
else:
self.settimeout(0.0)
def set_proxy(self, proxy_type=None, addr=None, port=None, rdns=True,
username=None, password=None):
""" Sets the proxy to be used.
proxy_type - 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 performed 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 = (proxy_type, addr, port, rdns,
username.encode() if username else None,
password.encode() if password else None)
def setproxy(self, *args, **kwargs):
if "proxytype" in kwargs:
kwargs["proxy_type"] = kwargs.pop("proxytype")
return self.set_proxy(*args, **kwargs)
def bind(self, *pos, **kw):
"""Implements proxy connection for UDP sockets.
Happens during the bind() phase."""
(proxy_type, proxy_addr, proxy_port, rdns, username,
password) = self.proxy
if not proxy_type or self.type != socket.SOCK_DGRAM:
return _orig_socket.bind(self, *pos, **kw)
if self._proxyconn:
raise socket.error(EINVAL, "Socket already bound to an address")
if proxy_type != SOCKS5:
msg = "UDP only supported by SOCKS5 proxy type"
raise socket.error(EOPNOTSUPP, msg)
super(socksocket, self).bind(*pos, **kw)
# Need to specify actual local port because
# some relays drop packets if a port of zero is specified.
# Avoid specifying host address in case of NAT though.
_, port = self.getsockname()
dst = ("0", port)
self._proxyconn = _orig_socket()
proxy = self._proxy_addr()
self._proxyconn.connect(proxy)
UDP_ASSOCIATE = b"\x03"
_, relay = self._SOCKS5_request(self._proxyconn, UDP_ASSOCIATE, dst)
# The relay is most likely on the same host as the SOCKS proxy,
# but some proxies return a private IP address (10.x.y.z)
host, _ = proxy
_, port = relay
super(socksocket, self).connect((host, port))
super(socksocket, self).settimeout(self._timeout)
self.proxy_sockname = ("0.0.0.0", 0) # Unknown
def sendto(self, bytes, *args, **kwargs):
if self.type != socket.SOCK_DGRAM:
return super(socksocket, self).sendto(bytes, *args, **kwargs)
if not self._proxyconn:
self.bind(("", 0))
address = args[-1]
flags = args[:-1]
header = BytesIO()
RSV = b"\x00\x00"
header.write(RSV)
STANDALONE = b"\x00"
header.write(STANDALONE)
self._write_SOCKS5_address(address, header)
sent = super(socksocket, self).send(header.getvalue() + bytes, *flags,
**kwargs)
return sent - header.tell()
def send(self, bytes, flags=0, **kwargs):
if self.type == socket.SOCK_DGRAM:
return self.sendto(bytes, flags, self.proxy_peername, **kwargs)
else:
return super(socksocket, self).send(bytes, flags, **kwargs)
def recvfrom(self, bufsize, flags=0):
if self.type != socket.SOCK_DGRAM:
return super(socksocket, self).recvfrom(bufsize, flags)
if not self._proxyconn:
self.bind(("", 0))
buf = BytesIO(super(socksocket, self).recv(bufsize + 1024, flags))
buf.seek(2, SEEK_CUR)
frag = buf.read(1)
if ord(frag):
raise NotImplementedError("Received UDP packet fragment")
fromhost, fromport = self._read_SOCKS5_address(buf)
if self.proxy_peername:
peerhost, peerport = self.proxy_peername
if fromhost != peerhost or peerport not in (0, fromport):
raise socket.error(EAGAIN, "Packet filtered")
return (buf.read(bufsize), (fromhost, fromport))
def recv(self, *pos, **kw):
bytes, _ = self.recvfrom(*pos, **kw)
return bytes
def close(self):
if self._proxyconn:
self._proxyconn.close()
return super(socksocket, self).close()
def get_proxy_sockname(self):
"""Returns the bound IP address and port number at the proxy."""
return self.proxy_sockname
getproxysockname = get_proxy_sockname
def get_proxy_peername(self):
"""
Returns the IP and port number of the proxy.
"""
return self.getpeername()
getproxypeername = get_proxy_peername
def get_peername(self):
"""Returns the IP address and port number of the destination machine.
Note: get_proxy_peername returns the proxy."""
return self.proxy_peername
getpeername = get_peername
def _negotiate_SOCKS5(self, *dest_addr):
"""Negotiates a stream connection through a SOCKS5 server."""
CONNECT = b"\x01"
self.proxy_peername, self.proxy_sockname = self._SOCKS5_request(
self, CONNECT, dest_addr)
def _SOCKS5_request(self, conn, cmd, dst):
"""
Send SOCKS5 request with given command (CMD field) and
address (DST field). Returns resolved DST address that was used.
"""
proxy_type, addr, port, rdns, username, password = self.proxy
writer = conn.makefile("wb")
reader = conn.makefile("rb", 0) # buffering=0 renamed in Python 3
try:
# First we'll send the authentication packages we support.
if username and password:
# The username/password details were supplied to the
# set_proxy method so we support the USERNAME/PASSWORD
# authentication (in addition to the standard none).
writer.write(b"\x05\x02\x00\x02")
else:
# No username/password were entered, therefore we
# only support connections with no authentication.
writer.write(b"\x05\x01\x00")
# We'll receive the server's response to determine which
# method was selected
writer.flush()
chosen_auth = self._readall(reader, 2)
if chosen_auth[0:1] != b"\x05":
# Note: string[i:i+1] is used because indexing of a bytestring
# via bytestring[i] yields an integer in Python 3
raise GeneralProxyError(
"SOCKS5 proxy server sent invalid data")
# Check the chosen authentication method
if chosen_auth[1:2] == b"\x02":
# Okay, we need to perform a basic username/password
# authentication.
if not (username and password):
# Although we said we don't support authentication, the
# server may still request basic username/password
# authentication
raise SOCKS5AuthError("No username/password supplied. "
"Server requested username/password"
" authentication")
writer.write(b"\x01" + chr(len(username)).encode()
+ username
+ chr(len(password)).encode()
+ password)
writer.flush()
auth_status = self._readall(reader, 2)
if auth_status[0:1] != b"\x01":
# Bad response
raise GeneralProxyError(
"SOCKS5 proxy server sent invalid data")
if auth_status[1:2] != b"\x00":
# Authentication failed
raise SOCKS5AuthError("SOCKS5 authentication failed")
# Otherwise, authentication succeeded
# No authentication is required if 0x00
elif chosen_auth[1:2] != b"\x00":
# Reaching here is always bad
if chosen_auth[1:2] == b"\xFF":
raise SOCKS5AuthError(
"All offered SOCKS5 authentication methods were"
" rejected")
else:
raise GeneralProxyError(
"SOCKS5 proxy server sent invalid data")
# Now we can request the actual connection
writer.write(b"\x05" + cmd + b"\x00")
resolved = self._write_SOCKS5_address(dst, writer)
writer.flush()
# Get the response
resp = self._readall(reader, 3)
if resp[0:1] != b"\x05":
raise GeneralProxyError(
"SOCKS5 proxy server sent invalid data")
status = ord(resp[1:2])
if status != 0x00:
# Connection failed: server returned an error
error = SOCKS5_ERRORS.get(status, "Unknown error")
raise SOCKS5Error("{:#04x}: {}".format(status, error))
# Get the bound address/port
bnd = self._read_SOCKS5_address(reader)
super(socksocket, self).settimeout(self._timeout)
return (resolved, bnd)
finally:
reader.close()
writer.close()
def _write_SOCKS5_address(self, addr, file):
"""
Return the host and port packed for the SOCKS5 protocol,
and the resolved address as a tuple object.
"""
host, port = addr
proxy_type, _, _, rdns, username, password = self.proxy
family_to_byte = {socket.AF_INET: b"\x01", socket.AF_INET6: b"\x04"}
# If the given destination address is an IP address, we'll
# use the IP address request even if remote resolving was specified.
# Detect whether the address is IPv4/6 directly.
for family in (socket.AF_INET, socket.AF_INET6):
try:
addr_bytes = socket.inet_pton(family, host)
file.write(family_to_byte[family] + addr_bytes)
host = socket.inet_ntop(family, addr_bytes)
file.write(struct.pack(">H", port))
return host, port
except socket.error:
continue
# Well it's not an IP number, so it's probably a DNS name.
if rdns:
# Resolve remotely
host_bytes = host.encode("idna")
file.write(b"\x03" + chr(len(host_bytes)).encode() + host_bytes)
else:
# Resolve locally
addresses = socket.getaddrinfo(host, port, socket.AF_UNSPEC,
socket.SOCK_STREAM,
socket.IPPROTO_TCP,
socket.AI_ADDRCONFIG)
# We can't really work out what IP is reachable, so just pick the
# first.
target_addr = addresses[0]
family = target_addr[0]
host = target_addr[4][0]
addr_bytes = socket.inet_pton(family, host)
file.write(family_to_byte[family] + addr_bytes)
host = socket.inet_ntop(family, addr_bytes)
file.write(struct.pack(">H", port))
return host, port
def _read_SOCKS5_address(self, file):
atyp = self._readall(file, 1)
if atyp == b"\x01":
addr = socket.inet_ntoa(self._readall(file, 4))
elif atyp == b"\x03":
length = self._readall(file, 1)
addr = self._readall(file, ord(length))
elif atyp == b"\x04":
addr = socket.inet_ntop(socket.AF_INET6, self._readall(file, 16))
else:
raise GeneralProxyError("SOCKS5 proxy server sent invalid data")
port = struct.unpack(">H", self._readall(file, 2))[0]
return addr, port
def _negotiate_SOCKS4(self, dest_addr, dest_port):
"""Negotiates a connection through a SOCKS4 server."""
proxy_type, addr, port, rdns, username, password = self.proxy
writer = self.makefile("wb")
reader = self.makefile("rb", 0) # buffering=0 renamed in Python 3
try:
# Check if the destination address provided is an IP address
remote_resolve = False
try:
addr_bytes = socket.inet_aton(dest_addr)
except socket.error:
# It's a DNS name. Check where it should be resolved.
if rdns:
addr_bytes = b"\x00\x00\x00\x01"
remote_resolve = True
else:
addr_bytes = socket.inet_aton(
socket.gethostbyname(dest_addr))
# Construct the request packet
writer.write(struct.pack(">BBH", 0x04, 0x01, dest_port))
writer.write(addr_bytes)
# The username parameter is considered userid for SOCKS4
if username:
writer.write(username)
writer.write(b"\x00")
# 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 remote_resolve:
writer.write(dest_addr.encode("idna") + b"\x00")
writer.flush()
# Get the response from the server
resp = self._readall(reader, 8)
if resp[0:1] != b"\x00":
# Bad data
raise GeneralProxyError(
"SOCKS4 proxy server sent invalid data")
status = ord(resp[1:2])
if status != 0x5A:
# Connection failed: server returned an error
error = SOCKS4_ERRORS.get(status, "Unknown error")
raise SOCKS4Error("{:#04x}: {}".format(status, error))
# Get the bound address/port
self.proxy_sockname = (socket.inet_ntoa(resp[4:]),
struct.unpack(">H", resp[2:4])[0])
if remote_resolve:
self.proxy_peername = socket.inet_ntoa(addr_bytes), dest_port
else:
self.proxy_peername = dest_addr, dest_port
finally:
reader.close()
writer.close()
def _negotiate_HTTP(self, dest_addr, dest_port):
"""Negotiates a connection through an HTTP server.
NOTE: This currently only supports HTTP CONNECT-style proxies."""
proxy_type, addr, port, rdns, username, password = self.proxy
# If we need to resolve locally, we do this now
addr = dest_addr if rdns else socket.gethostbyname(dest_addr)
http_headers = [
(b"CONNECT " + addr.encode("idna") + b":"
+ str(dest_port).encode() + b" HTTP/1.1"),
b"Host: " + dest_addr.encode("idna")
]
if username and password:
http_headers.append(b"Proxy-Authorization: basic "
+ b64encode(username + b":" + password))
http_headers.append(b"\r\n")
self.sendall(b"\r\n".join(http_headers))
# We just need the first line to check if the connection was successful
fobj = self.makefile()
status_line = fobj.readline()
fobj.close()
if not status_line:
raise GeneralProxyError("Connection closed unexpectedly")
try:
proto, status_code, status_msg = status_line.split(" ", 2)
except ValueError:
raise GeneralProxyError("HTTP proxy server sent invalid response")
if not proto.startswith("HTTP/"):
raise GeneralProxyError(
"Proxy server does not appear to be an HTTP proxy")
try:
status_code = int(status_code)
except ValueError:
raise HTTPError(
"HTTP proxy server did not return a valid HTTP status")
if status_code != 200:
error = "{}: {}".format(status_code, status_msg)
if status_code in (400, 403, 405):
# It's likely that the HTTP proxy server does not support the
# CONNECT tunneling method
error += ("\n[*] Note: The HTTP proxy server may not be"
" supported by PySocks (must be a CONNECT tunnel"
" proxy)")
raise HTTPError(error)
self.proxy_sockname = (b"0.0.0.0", 0)
self.proxy_peername = addr, dest_port
_proxy_negotiators = {
SOCKS4: _negotiate_SOCKS4,
SOCKS5: _negotiate_SOCKS5,
HTTP: _negotiate_HTTP
}
@set_self_blocking
def connect(self, dest_pair, catch_errors=None):
"""
Connects to the specified destination through a proxy.
Uses the same API as socket's connect().
To select the proxy server, use set_proxy().
dest_pair - 2-tuple of (IP/hostname, port).
"""
if len(dest_pair) != 2 or dest_pair[0].startswith("["):
# Probably IPv6, not supported -- raise an error, and hope
# Happy Eyeballs (RFC6555) makes sure at least the IPv4
# connection works...
raise socket.error("PySocks doesn't support IPv6: %s"
% str(dest_pair))
dest_addr, dest_port = dest_pair
if self.type == socket.SOCK_DGRAM:
if not self._proxyconn:
self.bind(("", 0))
dest_addr = socket.gethostbyname(dest_addr)
# If the host address is INADDR_ANY or similar, reset the peer
# address so that packets are received from any peer
if dest_addr == "0.0.0.0" and not dest_port:
self.proxy_peername = None
else:
self.proxy_peername = (dest_addr, dest_port)
return
(proxy_type, proxy_addr, proxy_port, rdns, username,
password) = self.proxy
# Do a minimal input check first
if (not isinstance(dest_pair, (list, tuple))
or len(dest_pair) != 2
or not dest_addr
or not isinstance(dest_port, int)):
# Inputs failed, raise an error
raise GeneralProxyError(
"Invalid destination-connection (host, port) pair")
# We set the timeout here so that we don't hang in connection or during
# negotiation.
super(socksocket, self).settimeout(self._timeout)
if proxy_type is None:
# Treat like regular socket object
self.proxy_peername = dest_pair
super(socksocket, self).settimeout(self._timeout)
super(socksocket, self).connect((dest_addr, dest_port))
return
proxy_addr = self._proxy_addr()
try:
# Initial connection to proxy server.
super(socksocket, self).connect(proxy_addr)
except socket.error as error:
# Error while connecting to proxy
self.close()
if not catch_errors:
proxy_addr, proxy_port = proxy_addr
proxy_server = "{}:{}".format(proxy_addr, proxy_port)
printable_type = PRINTABLE_PROXY_TYPES[proxy_type]
msg = "Error connecting to {} proxy {}".format(printable_type,
proxy_server)
log.debug("%s due to: %s", msg, error)
raise ProxyConnectionError(msg, error)
else:
raise error
else:
# Connected to proxy server, now negotiate
try:
# Calls negotiate_{SOCKS4, SOCKS5, HTTP}
negotiate = self._proxy_negotiators[proxy_type]
negotiate(self, dest_addr, dest_port)
except socket.error as error:
if not catch_errors:
# Wrap socket errors
self.close()
raise GeneralProxyError("Socket error", error)
else:
raise error
except ProxyError:
# Protocol error while negotiating with proxy
self.close()
raise
@set_self_blocking
def connect_ex(self, dest_pair):
""" https://docs.python.org/3/library/socket.html#socket.socket.connect_ex
Like connect(address), but return an error indicator instead of raising an exception for errors returned by the C-level connect() call (other problems, such as "host not found" can still raise exceptions).
"""
try:
self.connect(dest_pair, catch_errors=True)
return 0
except OSError as e:
# If the error is numeric (socket errors are numeric), then return number as
# connect_ex expects. Otherwise raise the error again (socket timeout for example)
if e.errno:
return e.errno
else:
raise
def _proxy_addr(self):
"""
Return proxy address to connect to as tuple object
"""
(proxy_type, proxy_addr, proxy_port, rdns, username,
password) = self.proxy
proxy_port = proxy_port or DEFAULT_PORTS.get(proxy_type)
if not proxy_port:
raise GeneralProxyError("Invalid proxy type")
return proxy_addr, proxy_port
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