138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/*
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Copyright (c) 2016, 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_BIND_TO_DEVICE_HPP_INCLUDED
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#define TORRENT_BIND_TO_DEVICE_HPP_INCLUDED
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#include "libtorrent/config.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/error_code.hpp"
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#if TORRENT_USE_IFCONF || TORRENT_USE_NETLINK || TORRENT_USE_SYSCTL
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#include <sys/socket.h> // for SO_BINDTODEVICE
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#include <netinet/in.h>
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#endif
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namespace libtorrent { namespace aux {
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#if defined SO_BINDTODEVICE
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struct bind_to_device
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{
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explicit bind_to_device(char const* device): m_value(device) {}
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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_BINDTODEVICE; }
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template<class Protocol>
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char 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 strlen(m_value) + 1; }
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private:
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char const* m_value;
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};
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template <typename T>
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void bind_device(T& sock, char const* device, error_code& ec)
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{
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sock.set_option(bind_to_device(device), ec);
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}
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#define TORRENT_HAS_BINDTODEVICE 1
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#elif defined IP_BOUND_IF
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struct bind_to_device
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{
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explicit bind_to_device(unsigned int idx): m_value(idx) {}
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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_BOUND_IF; }
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template<class Protocol>
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char const* data(Protocol const&) const { return reinterpret_cast<char const*>(&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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private:
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unsigned int m_value;
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};
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template <typename T>
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void bind_device(T& sock, char const* device, error_code& ec)
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{
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unsigned int const if_idx = if_nametoindex(device);
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if (if_idx == 0)
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{
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ec.assign(errno, system_category());
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return;
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}
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sock.set_option(bind_to_device(if_idx), ec);
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}
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#define TORRENT_HAS_BINDTODEVICE 1
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#elif defined IP_FORCE_OUT_IFP
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struct bind_to_device
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{
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explicit bind_to_device(char const* device): m_value(device) {}
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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 IP_FORCE_OUT_IFP; }
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template<class Protocol>
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char 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 strlen(m_value) + 1; }
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private:
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char const* m_value;
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};
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template <typename T>
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void bind_device(T& sock, char const* device, error_code& ec)
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{
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sock.set_option(bind_to_device(device), ec);
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}
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#define TORRENT_HAS_BINDTODEVICE 1
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#else
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#define TORRENT_HAS_BINDTODEVICE 0
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#endif
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} }
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#endif
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