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147 lines
3.6 KiB
C++
147 lines
3.6 KiB
C++
#pragma once
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/*
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Note:
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- this class is marked for destruction
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- functionality to be absorbed into llarp/link/link_manager.hpp
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- can be subdivided into multiple objects
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*/
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#include "rc_lookup_handler.hpp"
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#include <llarp/util/thread/threading.hpp>
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#include <llarp/util/types.hpp>
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#include <llarp/util/formattable.hpp>
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#include <llarp/profiling.hpp>
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#include <unordered_map>
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#include <list>
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#include <memory>
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namespace llarp
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{
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struct PendingSession;
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struct LinkManager;
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struct I_RCLookupHandler;
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enum class SessionResult
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{
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Establish,
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Timeout,
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RouterNotFound,
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InvalidRouter,
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NoLink,
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EstablishFail
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};
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constexpr std::string_view
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ToString(SessionResult sr)
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{
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return sr == llarp::SessionResult::Establish ? "success"sv
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: sr == llarp::SessionResult::Timeout ? "timeout"sv
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: sr == llarp::SessionResult::NoLink ? "no link"sv
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: sr == llarp::SessionResult::InvalidRouter ? "invalid router"sv
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: sr == llarp::SessionResult::RouterNotFound ? "not found"sv
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: sr == llarp::SessionResult::EstablishFail ? "establish failed"sv
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: "???"sv;
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}
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template <>
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constexpr inline bool IsToStringFormattable<SessionResult> = true;
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using RouterCallback = std::function<void(const RouterID&, const SessionResult)>;
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struct OutboundSessionMaker
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{
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using Work_t = std::function<void(void)>;
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using WorkerFunc_t = std::function<void(Work_t)>;
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using CallbacksQueue = std::list<RouterCallback>;
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public:
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~OutboundSessionMaker() = default;
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bool
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OnSessionEstablished(AbstractLinkSession* session);
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void
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OnConnectTimeout(AbstractLinkSession* session);
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void
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CreateSessionTo(const RouterID& router, RouterCallback on_result) EXCLUDES(_mutex);
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void
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CreateSessionTo(const RouterContact& rc, RouterCallback on_result) EXCLUDES(_mutex);
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bool
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HavePendingSessionTo(const RouterID& router) const EXCLUDES(_mutex);
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void
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ConnectToRandomRouters(int numDesired);
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util::StatusObject
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ExtractStatus() const;
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bool
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ShouldConnectTo(const RouterID& router) const EXCLUDES(_mutex);
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void
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Init(
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Router* router,
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LinkManager* linkManager,
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RCLookupHandler* rcLookup,
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Profiling* profiler,
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EventLoop_ptr loop,
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WorkerFunc_t work);
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void
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SetOurRouter(RouterID r)
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{
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us = std::move(r);
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}
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/// always maintain this many connections to other routers
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size_t minConnectedRouters = 4;
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/// hard upperbound limit on the number of router to router connections
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size_t maxConnectedRouters = 6;
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private:
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void
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GotRouterContact(const RouterID& router, const RouterContact& rc) EXCLUDES(_mutex);
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void
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InvalidRouter(const RouterID& router);
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void
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RouterNotFound(const RouterID& router);
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void
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OnRouterContactResult(
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const RouterID& router, const RouterContact* const rc, const RCRequestResult result);
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void
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VerifyRC(const RouterContact rc);
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void
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CreatePendingSession(const RouterID& router) EXCLUDES(_mutex);
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void
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FinalizeRequest(const RouterID& router, const SessionResult type) EXCLUDES(_mutex);
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mutable util::Mutex _mutex; // protects pendingCallbacks
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std::unordered_map<RouterID, CallbacksQueue> pendingCallbacks GUARDED_BY(_mutex);
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Router* _router = nullptr;
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LinkManager* _linkManager = nullptr;
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RCLookupHandler* _rcLookup = nullptr;
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Profiling* _profiler = nullptr;
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std::shared_ptr<NodeDB> _nodedb;
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EventLoop_ptr _loop;
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WorkerFunc_t work;
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RouterID us;
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};
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} // namespace llarp
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