forked from premiere/premiere-libtorrent
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
/*
|
|
|
|
Copyright (c) 2007, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_BROADCAST_SOCKET_HPP_INCLUDED
|
|
#define TORRENT_BROADCAST_SOCKET_HPP_INCLUDED
|
|
|
|
#include "libtorrent/socket.hpp"
|
|
#include <boost/shared_ptr.hpp>
|
|
#include <boost/function.hpp>
|
|
#include <list>
|
|
|
|
namespace libtorrent
|
|
{
|
|
|
|
bool is_local(address const& a);
|
|
bool is_loopback(address const& addr);
|
|
bool is_multicast(address const& addr);
|
|
bool is_any(address const& addr);
|
|
int cidr_distance(address const& a1, address const& a2);
|
|
|
|
int common_bits(unsigned char const* b1
|
|
, unsigned char const* b2, int n);
|
|
|
|
address guess_local_address(asio::io_service&);
|
|
|
|
typedef boost::function<void(udp::endpoint const& from
|
|
, char* buffer, int size)> receive_handler_t;
|
|
|
|
class broadcast_socket
|
|
{
|
|
public:
|
|
broadcast_socket(asio::io_service& ios, udp::endpoint const& multicast_endpoint
|
|
, receive_handler_t const& handler, bool loopback = true);
|
|
~broadcast_socket() { close(); }
|
|
|
|
void send(char const* buffer, int size, asio::error_code& ec);
|
|
void close();
|
|
|
|
private:
|
|
|
|
struct socket_entry
|
|
{
|
|
socket_entry(boost::shared_ptr<datagram_socket> const& s): socket(s) {}
|
|
boost::shared_ptr<datagram_socket> socket;
|
|
char buffer[1024];
|
|
udp::endpoint remote;
|
|
void close()
|
|
{
|
|
if (!socket) return;
|
|
asio::error_code ec;
|
|
socket->close(ec);
|
|
}
|
|
};
|
|
|
|
void on_receive(socket_entry* s, asio::error_code const& ec
|
|
, std::size_t bytes_transferred);
|
|
void open_unicast_socket(io_service& ios, address const& addr);
|
|
void open_multicast_socket(io_service& ios, address const& addr
|
|
, bool loopback);
|
|
|
|
// these sockets are used to
|
|
// join the multicast group (on each interface)
|
|
// and receive multicast messages
|
|
std::list<socket_entry> m_sockets;
|
|
// these sockets are not bound to any
|
|
// specific port and are used to
|
|
// send messages to the multicast group
|
|
// and receive unicast responses
|
|
std::list<socket_entry> m_unicast_sockets;
|
|
udp::endpoint m_multicast_endpoint;
|
|
receive_handler_t m_on_receive;
|
|
|
|
};
|
|
}
|
|
|
|
#endif
|
|
|