mirror of
https://github.com/oxen-io/lokinet.git
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b4440094b0
- util::Mutex is now a std::shared_timed_mutex, which is capable of
exclusive and shared locks.
- util::Lock is still present as a std::lock_guard<util::Mutex>.
- the locking annotations are preserved, but updated to the latest
supported by clang rather than using abseil's older/deprecated ones.
- ACQUIRE_LOCK macro is gone since we don't pass mutexes by pointer into
locks anymore (WTF abseil).
- ReleasableLock is gone. Instead there are now some llarp::util helper
methods to obtain unique and/or shared locks:
- `auto lock = util::unique_lock(mutex);` gets an RAII-but-also
unlockable object (std::unique_lock<T>, with T inferred from
`mutex`).
- `auto lock = util::shared_lock(mutex);` gets an RAII shared (i.e.
"reader") lock of the mutex.
- `auto lock = util::unique_locks(mutex1, mutex2, mutex3);` can be
used to atomically lock multiple mutexes at once (returning a
tuple of the locks).
This are templated on the mutex which makes them a bit more flexible
than using a concrete type: they can be used for any type of lockable
mutex, not only util::Mutex. (Some of the code here uses them for
getting locks around a std::mutex). Until C++17, using the RAII types
is painfully verbose:
```C++
// pre-C++17 - needing to figure out the mutex type here is annoying:
std::unique_lock<util::Mutex> lock(mutex);
// pre-C++17 and even more verbose (but at least the type isn't needed):
std::unique_lock<decltype(mutex)> lock(mutex);
// our compromise:
auto lock = util::unique_lock(mutex);
// C++17:
std::unique_lock lock(mutex);
```
All of these functions will also warn (under gcc or clang) if you
discard the return value. You can also do fancy things like
`auto l = util::unique_lock(mutex, std::adopt_lock)` (which lets a
lock take over an already-locked mutex).
- metrics code is gone, which also removes a big pile of code that was
only used by metrics:
- llarp::util::Scheduler
- llarp:🧵:TimerQueue
- llarp::util::Stopwatch
126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
#ifndef LLARP_RC_LOOKUP_HANDLER_HPP
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#define LLARP_RC_LOOKUP_HANDLER_HPP
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#include <chrono>
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#include <router/i_rc_lookup_handler.hpp>
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#include <util/thread/threading.hpp>
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#include <util/thread/thread_pool.hpp>
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#include <unordered_map>
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#include <set>
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#include <list>
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struct llarp_nodedb;
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struct llarp_dht_context;
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namespace llarp
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{
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namespace service
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{
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struct Context;
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} // namespace service
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struct ILinkManager;
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struct RCLookupHandler final : public I_RCLookupHandler
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{
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public:
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using CallbacksQueue = std::list< RCRequestCallback >;
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~RCLookupHandler() override = default;
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void
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AddValidRouter(const RouterID &router) override EXCLUDES(_mutex);
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void
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RemoveValidRouter(const RouterID &router) override EXCLUDES(_mutex);
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void
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SetRouterWhitelist(const std::vector< RouterID > &routers) override
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EXCLUDES(_mutex);
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bool
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HaveReceivedWhitelist();
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void
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GetRC(const RouterID &router, RCRequestCallback callback,
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bool forceLookup = false) override EXCLUDES(_mutex);
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bool
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RemoteIsAllowed(const RouterID &remote) const override EXCLUDES(_mutex);
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bool
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CheckRC(const RouterContact &rc) const override;
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bool
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GetRandomWhitelistRouter(RouterID &router) const override EXCLUDES(_mutex);
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bool
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CheckRenegotiateValid(RouterContact newrc, RouterContact oldrc) override;
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void
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PeriodicUpdate(llarp_time_t now) override;
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void
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ExploreNetwork() override;
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size_t
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NumberOfStrictConnectRouters() const override;
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void
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Init(llarp_dht_context *dht, llarp_nodedb *nodedb,
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std::shared_ptr< llarp::thread::ThreadPool > threadpool,
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ILinkManager *linkManager, service::Context *hiddenServiceContext,
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const std::set< RouterID > &strictConnectPubkeys,
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const std::set< RouterContact > &bootstrapRCList,
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bool useWhitelist_arg, bool isServiceNode_arg);
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private:
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void
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HandleDHTLookupResult(RouterID remote,
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const std::vector< RouterContact > &results);
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bool
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HavePendingLookup(RouterID remote) const EXCLUDES(_mutex);
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bool
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RemoteInBootstrap(const RouterID &remote) const;
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void
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FinalizeRequest(const RouterID &router, const RouterContact *const rc,
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RCRequestResult result) EXCLUDES(_mutex);
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mutable util::Mutex _mutex; // protects pendingCallbacks, whitelistRouters
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llarp_dht_context *_dht = nullptr;
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llarp_nodedb *_nodedb = nullptr;
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std::shared_ptr< llarp::thread::ThreadPool > _threadpool = nullptr;
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service::Context *_hiddenServiceContext = nullptr;
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ILinkManager *_linkManager = nullptr;
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/// explicit whitelist of routers we will connect to directly (not for
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/// service nodes)
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std::set< RouterID > _strictConnectPubkeys;
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std::set< RouterContact > _bootstrapRCList;
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std::set< RouterID > _bootstrapRouterIDList;
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std::unordered_map< RouterID, CallbacksQueue, RouterID::Hash >
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pendingCallbacks GUARDED_BY(_mutex);
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bool useWhitelist = false;
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bool isServiceNode = false;
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std::set< RouterID > whitelistRouters GUARDED_BY(_mutex);
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using TimePoint = std::chrono::steady_clock::time_point;
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std::unordered_map< RouterID, TimePoint, RouterID::Hash >
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_routerLookupTimes;
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};
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} // namespace llarp
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#endif // LLARP_RC_LOOKUP_HANDLER_HPP
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