Re: [gentoo-portage-dev] [PATCH v2] Support escaping network-sandbox through SOCKSv5 proxy

[Zac Medico <zmedico@gentoo.org>]

On 01/25/2015 06:00 AM, Michał Górny wrote:
> diff --git a/bin/socks5-server.py b/bin/socks5-server.py
> new file mode 100644
> index 0000000..c079018
> --- /dev/null
> +++ b/bin/socks5-server.py
> @@ -0,0 +1,218 @@
> +#!/usr/bin/env python
> +# SOCKSv5 proxy server for network-sandbox
> +# Copyright 2015 Gentoo Foundation
> +# Distributed under the terms of the GNU General Public License v2
> +
> +import asyncore
> +import errno
> +import socket
> +import struct
> +import sys
> +
> +
> +class ProxyConnection(asyncore.dispatcher_with_send):
> +	_addr = None
> +	_connected = False
> +	_family = socket.AF_INET
> +	_proxy_conn = None
> +
> +	def __init__(self, proxy_conn):
> +		self._proxy_conn = proxy_conn
> +		asyncore.dispatcher_with_send.__init__(self)
> +		self.create_socket(self._family, socket.SOCK_STREAM)
> +
> +	def start_connection(self, host, port):
> +		try:
> +			self.connect((host, port))
> +		except:
> +			self.handle_error()
> +
> +	def handle_read(self):
> +		buf = self.recv(4096)
> +		self._proxy_conn.send(buf)

The self.recv calls should probably handle BlockingIOError, since the
docs say it can be raised "even though select.select() or select.poll()
has reported the socket ready for reading".
-- 
Thanks,
Zac