/usr/lib/python2.7/dist-packages/linkcheck/socketutil.py is in linkchecker 9.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | # -*- coding: iso-8859-1 -*-
# Copyright (C) 2008-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import socket
# test for IPv6, both in Python build and in kernel build
has_ipv6 = False
if socket.has_ipv6:
# python has ipv6 compiled in, but the operating system also
# has to support it.
try:
socket.socket(socket.AF_INET6, socket.SOCK_STREAM).close()
has_ipv6 = True
except socket.error as msg:
# only catch these one:
# socket.error: (97, 'Address family not supported by protocol')
# socket.error: (10047, 'Address family not supported by protocol')
# socket.error: (43, 'Protocol not supported')
if msg.args[0] not in (97, 10047, 43):
raise
def create_socket (family, socktype, proto=0, timeout=60):
"""
Create a socket with given family and type. If SSL context
is given an SSL socket is created.
"""
sock = socket.socket(family, socktype, proto=proto)
sock.settimeout(timeout)
socktypes_inet = [socket.AF_INET]
if has_ipv6:
socktypes_inet.append(socket.AF_INET6)
if family in socktypes_inet and socktype == socket.SOCK_STREAM:
# disable NAGLE algorithm, which means sending pending data
# immediately, possibly wasting bandwidth but improving
# responsiveness for fast networks
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
return sock
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