195 lines
7.9 KiB
C++
195 lines
7.9 KiB
C++
/*
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* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
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*
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* The MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#pragma once
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#include <graphene/p2p/node.hpp>
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#include <graphene/p2p/message.hpp>
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#include <graphene/p2p/message_oriented_connection.hpp>
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#include <graphene/p2p/stcp_socket.hpp>
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#include <boost/tuple/tuple.hpp>
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#include <boost/multi_index_container.hpp>
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#include <boost/multi_index/ordered_index.hpp>
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#include <boost/multi_index/mem_fun.hpp>
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#include <boost/multi_index/member.hpp>
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#include <boost/multi_index/random_access_index.hpp>
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#include <boost/multi_index/tag.hpp>
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#include <boost/multi_index/sequenced_index.hpp>
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#include <boost/multi_index/hashed_index.hpp>
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#include <queue>
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#include <boost/container/deque.hpp>
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#include <fc/thread/future.hpp>
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namespace graphene { namespace p2p {
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class peer_connection;
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class peer_connection_delegate
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{
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public:
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virtual void on_message(peer_connection* originating_peer, const message& received_message) = 0;
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virtual void on_connection_closed(peer_connection* originating_peer) = 0;
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};
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class peer_connection;
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typedef std::shared_ptr<peer_connection> peer_connection_ptr;
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/**
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* Each connection maintains its own queue of messages to be sent, when an item
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* is first pushed to the queue it starts an async fiber that will sequentially write
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* all items until there is nothing left to be sent.
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*
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* If a particular connection is unable to keep up with the real-time stream of
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* messages to be sent then it will be disconnected. The backlog will be measured in
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* seconds.
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*
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* A multi-index container that tracks the
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*/
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class peer_connection : public message_oriented_connection_delegate,
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public std::enable_shared_from_this<peer_connection>
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{
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public:
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enum direction_type { inbound, outbound };
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enum connection_state {
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connecting = 0,
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syncing = 1,
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synced = 2
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};
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fc::time_point connection_initiation_time;
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fc::time_point connection_closed_time;
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fc::time_point connection_terminated_time;
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direction_type direction = outbound;
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connection_state state = connecting;
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bool is_firewalled = true
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//connection_state state;
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fc::microseconds clock_offset;
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fc::microseconds round_trip_delay;
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/// data about the peer node
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/// @{
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/** the unique identifier we'll use to refer to the node with. zero-initialized before
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* we receive the hello message, at which time it will be filled with either the "node_id"
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* from the user_data field of the hello, or if none is present it will be filled with a
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* copy of node_public_key */
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public_key_type node_id;
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uint32_t core_protocol_version;
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std::string user_agent;
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fc::optional<std::string> graphene_git_revision_sha;
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fc::optional<fc::time_point_sec> graphene_git_revision_unix_timestamp;
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fc::optional<std::string> fc_git_revision_sha;
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fc::optional<fc::time_point_sec> fc_git_revision_unix_timestamp;
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fc::optional<std::string> platform;
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fc::optional<uint32_t> bitness;
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// for inbound connections, these fields record what the peer sent us in
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// its hello message. For outbound, they record what we sent the peer
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// in our hello message
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fc::ip::address inbound_address;
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uint16_t inbound_port;
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uint16_t outbound_port;
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/// @}
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void send( transaction_message_ptr msg )
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{
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// if not in sent_or_received then insert into _pending_send
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// if process_send_queue is invalid or complete then
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// async process_send_queue
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}
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void received_transaction( const transaction_id_type& id )
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{
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_sent_or_received.insert(id);
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}
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void process_send_queue()
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{
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// while _pending_send.size() || _pending_blocks.size()
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// while there are pending blocks, then take the oldest
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// for each transaction id, verify that it exists in _sent_or_received
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// else find it in the _pending_send queue and send it
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// send one from _pending_send
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}
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std::unordered_map<transaction_id_type, transaction_message_ptr> _pending_send;
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/// todo: make multi-index that tracks how long items have been cached and removes them
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/// after a resasonable period of time (say 10 seconds)
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std::unordered_set<transaction_id_type> _sent_or_received;
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std::map<uint32_t,block_message_ptr> _pending_blocks;
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fc::ip::endpoint get_remote_endpoint()const
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{ return get_socket().get_remote_endpoint(); }
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void on_message(message_oriented_connection* originating_connection,
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const message& received_message) override
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{
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switch( core_message_type_enum( received_message.type ) )
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{
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case hello_message_type:
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_node->on_hello( shared_from_this(),
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received_message.as<hello_message>() );
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break;
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case transaction_message_type:
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_node->on_transaction( shared_from_this(),
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received_message.as<transaction_message>() );
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break;
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case block_message_type:
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_node->on_block( shared_from_this(),
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received_message.as<block_message>() );
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break;
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case peer_message_type:
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_node->on_peers( shared_from_this(),
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received_message.as<peers_message>() );
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break;
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}
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}
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void on_connection_closed(message_oriented_connection* originating_connection) override
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{
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_node->on_close( shared_from_this() );
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}
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fc::tcp_socket& get_socket() { return _message_connection.get_socket(); }
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private:
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peer_connection_delegate* _node;
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fc::optional<fc::ip::endpoint> _remote_endpoint;
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message_oriented_connection _message_connection;
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};
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typedef std::shared_ptr<peer_connection> peer_connection_ptr;
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} } // end namespace graphene::p2p
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// not sent over the wire, just reflected for logging
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FC_REFLECT_ENUM(graphene::p2p::peer_connection::connection_state, (connecting)(syncing)(synced) )
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FC_REFLECT_ENUM(graphene::p2p::peer_connection::direction_type, (inbound)(outbound) )
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