268 lines
8.1 KiB
C++
268 lines
8.1 KiB
C++
/*
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Copyright (c) 2003-2018, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_SOCKET_HPP_INCLUDED
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#define TORRENT_SOCKET_HPP_INCLUDED
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#include "libtorrent/config.hpp"
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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// if building as Objective C++, asio's template
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// parameters Protocol has to be renamed to avoid
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// colliding with keywords
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#ifdef __OBJC__
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#define Protocol Protocol_
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#endif
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#if defined TORRENT_WINDOWS || defined TORRENT_CYGWIN
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// asio assumes that the windows error codes are defined already
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#include <winsock2.h>
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#endif
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#include <boost/asio/ip/tcp.hpp>
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#include <boost/asio/ip/udp.hpp>
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#include <boost/asio/write.hpp>
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#include <boost/asio/read.hpp>
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#ifdef __OBJC__
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#undef Protocol
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#endif
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#if defined TORRENT_BUILD_SIMULATOR
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#include "simulator/simulator.hpp"
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#endif
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#if TORRENT_USE_NETLINK
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#include <linux/netlink.h>
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#ifndef SOL_NETLINK
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#define SOL_NETLINK 270
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#endif
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// NETLINK_NO_ENOBUFS exists at least since android 2.3, but is not exposed
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#if defined TORRENT_ANDROID && !defined NETLINK_NO_ENOBUFS
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#define NETLINK_NO_ENOBUFS 5
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#endif
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#endif
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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namespace libtorrent {
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#if defined TORRENT_BUILD_SIMULATOR
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using udp = sim::asio::ip::udp;
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using tcp = sim::asio::ip::tcp;
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using sim::asio::async_write;
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using sim::asio::async_read;
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using null_buffers = sim::asio::null_buffers;
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#else
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using tcp = boost::asio::ip::tcp;
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using udp = boost::asio::ip::udp;
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using boost::asio::async_write;
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using boost::asio::async_read;
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using null_buffers = boost::asio::null_buffers;
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#endif
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// internal
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inline udp::endpoint make_udp(tcp::endpoint const ep)
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{ return {ep.address(), ep.port()}; }
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// internal
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inline tcp::endpoint make_tcp(udp::endpoint const ep)
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{ return {ep.address(), ep.port()}; }
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#ifdef TORRENT_WINDOWS
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#ifndef PROTECTION_LEVEL_UNRESTRICTED
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#define PROTECTION_LEVEL_UNRESTRICTED 10
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#endif
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#ifndef IPV6_PROTECTION_LEVEL
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#define IPV6_PROTECTION_LEVEL 30
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#endif
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struct v6_protection_level
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{
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explicit v6_protection_level(int level): m_value(level) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_IPV6; }
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template<class Protocol>
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int name(Protocol const&) const { return IPV6_PROTECTION_LEVEL; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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struct exclusive_address_use
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{
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explicit exclusive_address_use(int enable): m_value(enable) {}
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template<class Protocol>
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int level(Protocol const&) const { return SOL_SOCKET; }
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template<class Protocol>
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int name(Protocol const&) const { return SO_EXCLUSIVEADDRUSE; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#endif // TORRENT_WINDOWS
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#ifdef IPV6_TCLASS
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struct traffic_class
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{
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explicit traffic_class(char val): m_value(val) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_IPV6; }
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template<class Protocol>
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int name(Protocol const&) const { return IPV6_TCLASS; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#endif
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struct type_of_service
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{
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#ifdef _WIN32
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using tos_t = DWORD;
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#else
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using tos_t = int;
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#endif
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explicit type_of_service(char val) : m_value(tos_t(val)) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_IP; }
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template<class Protocol>
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int name(Protocol const&) const { return IP_TOS; }
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template<class Protocol>
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tos_t const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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tos_t m_value;
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};
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#if defined IP_DONTFRAG || defined IP_MTU_DISCOVER || defined IP_DONTFRAGMENT
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#define TORRENT_HAS_DONT_FRAGMENT
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#endif
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#ifdef TORRENT_HAS_DONT_FRAGMENT
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// the order of these preprocessor tests matters. Windows defines both
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// IP_DONTFRAGMENT and IP_MTU_DISCOVER, but the latter is not supported
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// in general, the simple option of just setting the DF bit is preferred, if
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// it's available
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#if defined IP_DONTFRAG || defined IP_DONTFRAGMENT
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struct dont_fragment
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{
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explicit dont_fragment(bool val) : m_value(val) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_IP; }
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template<class Protocol>
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int name(Protocol const&) const
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#if defined IP_DONTFRAG
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{ return IP_DONTFRAG; }
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#else // defined IP_DONTFRAGMENT
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{ return IP_DONTFRAGMENT; }
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#endif
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#else
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// this is the fallback mechanism using the IP_MTU_DISCOVER option, which
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// does a little bit more than we want, it makes the kernel track an estimate
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// of the MTU and rejects packets immediately if they are believed to exceed
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// it.
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struct dont_fragment
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{
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explicit dont_fragment(bool val)
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: m_value(val ? IP_PMTUDISC_DO : IP_PMTUDISC_DONT) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_IP; }
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template<class Protocol>
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int name(Protocol const&) const { return IP_MTU_DISCOVER; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#endif // IP_DONTFRAG vs. IP_MTU_DISCOVER
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#endif // TORRENT_HAS_DONT_FRAGMENT
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#if TORRENT_USE_NETLINK
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struct no_enobufs
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{
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explicit no_enobufs(bool val) : m_value(val) {}
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template<class Protocol>
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int level(Protocol const&) const { return SOL_NETLINK; }
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template<class Protocol>
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int name(Protocol const&) const { return NETLINK_NO_ENOBUFS; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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std::size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#endif // TORRENT_USE_NETLINK
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#ifdef TCP_NOTSENT_LOWAT
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struct tcp_notsent_lowat
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{
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explicit tcp_notsent_lowat(int val) : m_value(val) {}
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template<class Protocol>
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int level(Protocol const&) const { return IPPROTO_TCP; }
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template<class Protocol>
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int name(Protocol const&) const { return TCP_NOTSENT_LOWAT; }
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template<class Protocol>
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int const* data(Protocol const&) const { return &m_value; }
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template<class Protocol>
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std::size_t size(Protocol const&) const { return sizeof(m_value); }
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int m_value;
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};
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#endif
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}
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#endif // TORRENT_SOCKET_HPP_INCLUDED
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