124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
/*
|
|
|
|
Copyright (c) 2006, Arvid Norberg & Daniel Wallin
|
|
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 TRAVERSAL_ALGORITHM_050324_HPP
|
|
#define TRAVERSAL_ALGORITHM_050324_HPP
|
|
|
|
#include <vector>
|
|
#include <set>
|
|
|
|
#include <libtorrent/kademlia/node_id.hpp>
|
|
#include <libtorrent/kademlia/routing_table.hpp>
|
|
#include <libtorrent/kademlia/logging.hpp>
|
|
#include <libtorrent/kademlia/observer.hpp>
|
|
#include <libtorrent/address.hpp>
|
|
|
|
#include <boost/noncopyable.hpp>
|
|
#include <boost/intrusive_ptr.hpp>
|
|
#include <boost/bind.hpp>
|
|
#include <boost/pool/pool.hpp>
|
|
|
|
namespace libtorrent { struct dht_lookup; }
|
|
namespace libtorrent { namespace dht
|
|
{
|
|
#ifdef TORRENT_DHT_VERBOSE_LOGGING
|
|
TORRENT_DECLARE_LOG(traversal);
|
|
#endif
|
|
|
|
class rpc_manager;
|
|
class node_impl;
|
|
|
|
// this class may not be instantiated as a stack object
|
|
struct traversal_algorithm : boost::noncopyable
|
|
{
|
|
void traverse(node_id const& id, udp::endpoint addr);
|
|
void finished(observer_ptr o);
|
|
|
|
enum flags_t { prevent_request = 1, short_timeout = 2 };
|
|
void failed(observer_ptr o, int flags = 0);
|
|
virtual ~traversal_algorithm();
|
|
void status(dht_lookup& l);
|
|
|
|
void* allocate_observer();
|
|
void free_observer(void* ptr);
|
|
|
|
virtual char const* name() const { return "traversal_algorithm"; }
|
|
virtual void start();
|
|
|
|
node_id const& target() const { return m_target; }
|
|
|
|
void add_entry(node_id const& id, udp::endpoint addr, unsigned char flags);
|
|
|
|
traversal_algorithm(node_impl& node, node_id target);
|
|
|
|
protected:
|
|
|
|
void add_requests();
|
|
void add_router_entries();
|
|
void init();
|
|
|
|
virtual void done();
|
|
// should construct an algorithm dependent
|
|
// observer in ptr.
|
|
virtual observer_ptr new_observer(void* ptr
|
|
, udp::endpoint const& ep, node_id const& id);
|
|
|
|
virtual bool invoke(observer_ptr o) { return false; }
|
|
|
|
friend void intrusive_ptr_add_ref(traversal_algorithm* p)
|
|
{
|
|
p->m_ref_count++;
|
|
}
|
|
|
|
friend void intrusive_ptr_release(traversal_algorithm* p)
|
|
{
|
|
if (--p->m_ref_count == 0)
|
|
delete p;
|
|
}
|
|
|
|
int m_ref_count;
|
|
|
|
node_impl& m_node;
|
|
node_id m_target;
|
|
std::vector<observer_ptr> m_results;
|
|
int m_invoke_count;
|
|
int m_branch_factor;
|
|
int m_responses;
|
|
int m_timeouts;
|
|
int m_num_target_nodes;
|
|
};
|
|
|
|
} } // namespace libtorrent::dht
|
|
|
|
#endif // TRAVERSAL_ALGORITHM_050324_HPP
|
|
|