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103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
// Copyright (c) 2020, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF 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 CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <functional>
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#include <limits>
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#include <map>
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#include <string>
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#include <utility>
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#include <boost/multi_index_container.hpp>
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#include <boost/multi_index/member.hpp>
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#include <boost/multi_index/ordered_index.hpp>
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#include <boost/optional/optional.hpp>
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#include "net/http_client.h"
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namespace cryptonote
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{
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namespace bootstrap_node
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{
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struct node_info
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{
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std::string address;
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boost::optional<epee::net_utils::http::login> credentials;
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};
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struct selector
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{
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virtual void handle_result(const std::string &address, bool success) = 0;
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virtual boost::optional<node_info> next_node() = 0;
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};
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class selector_auto : public selector
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{
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public:
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selector_auto(std::function<std::map<std::string, bool>()> get_nodes, size_t max_nodes = 1000)
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: m_get_nodes(std::move(get_nodes))
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, m_max_nodes(max_nodes)
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{}
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void handle_result(const std::string &address, bool success) final;
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boost::optional<node_info> next_node() final;
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private:
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bool has_at_least_one_good_node() const;
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void append_new_nodes();
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void truncate();
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private:
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struct node
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{
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std::string address;
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size_t fails;
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void handle_result(bool success);
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};
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struct by_address {};
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struct by_fails {};
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typedef boost::multi_index_container<
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node,
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boost::multi_index::indexed_by<
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boost::multi_index::ordered_unique<boost::multi_index::tag<by_address>, boost::multi_index::member<node, std::string, &node::address>>,
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boost::multi_index::ordered_non_unique<boost::multi_index::tag<by_fails>, boost::multi_index::member<node, size_t, &node::fails>>
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>
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> nodes_list;
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const std::function<std::map<std::string, bool>()> m_get_nodes;
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const size_t m_max_nodes;
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nodes_list m_nodes;
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};
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}
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}
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