Core/Network: Move to separate project

1 files changed, 146 insertions, 0 deletions

diff --git a/src/common/network/SocketMgr.h b/src/common/network/SocketMgr.h
new file mode 100644
index 00000000000..07252355308
--- /dev/null
+++ b/src/common/network/SocketMgr.h
@@ -0,0 +1,146 @@
+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TRINITYCORE_SOCKET_MGR_H
+#define TRINITYCORE_SOCKET_MGR_H
+
+#include "AsyncAcceptor.h"
+#include "Errors.h"
+#include "NetworkThread.h"
+#include "Socket.h"
+#include <boost/asio/ip/tcp.hpp>
+#include <memory>
+
+namespace Trinity::Net
+{
+template<class SocketType>
+class SocketMgr
+{
+public:
+    SocketMgr(SocketMgr const&) = delete;
+    SocketMgr(SocketMgr&&) = delete;
+    SocketMgr& operator=(SocketMgr const&) = delete;
+    SocketMgr& operator=(SocketMgr&&) = delete;
+
+    virtual ~SocketMgr()
+    {
+        ASSERT(!_threads && !_acceptor && !_threadCount, "StopNetwork must be called prior to SocketMgr destruction");
+    }
+
+    virtual bool StartNetwork(Asio::IoContext& ioContext, std::string const& bindIp, uint16 port, int threadCount)
+    {
+        ASSERT(threadCount > 0);
+
+        std::unique_ptr<AsyncAcceptor> acceptor = nullptr;
+        try
+        {
+            acceptor = std::make_unique<AsyncAcceptor>(ioContext, bindIp, port);
+        }
+        catch (boost::system::system_error const& err)
+        {
+            TC_LOG_ERROR("network", "Exception caught in SocketMgr.StartNetwork ({}:{}): {}", bindIp, port, err.what());
+            return false;
+        }
+
+        if (!acceptor->Bind())
+        {
+            TC_LOG_ERROR("network", "StartNetwork failed to bind socket acceptor");
+            return false;
+        }
+
+        _acceptor = std::move(acceptor);
+        _threadCount = threadCount;
+        _threads.reset(CreateThreads());
+
+        ASSERT(_threads);
+
+        for (int32 i = 0; i < _threadCount; ++i)
+            _threads[i].Start();
+
+        _acceptor->SetSocketFactory([this]() { return GetSocketForAccept(); });
+
+        return true;
+    }
+
+    virtual void StopNetwork()
+    {
+        _acceptor->Close();
+
+        for (int32 i = 0; i < _threadCount; ++i)
+            _threads[i].Stop();
+
+        Wait();
+
+        _acceptor = nullptr;
+        _threads = nullptr;
+        _threadCount = 0;
+    }
+
+    void Wait()
+    {
+        for (int32 i = 0; i < _threadCount; ++i)
+            _threads[i].Wait();
+    }
+
+    virtual void OnSocketOpen(IoContextTcpSocket&& sock, uint32 threadIndex)
+    {
+        try
+        {
+            std::shared_ptr<SocketType> newSocket = std::make_shared<SocketType>(std::move(sock));
+            newSocket->Start();
+
+            _threads[threadIndex].AddSocket(newSocket);
+        }
+        catch (boost::system::system_error const& err)
+        {
+            TC_LOG_WARN("network", "Failed to retrieve client's remote address {}", err.what());
+        }
+    }
+
+    int32 GetNetworkThreadCount() const { return _threadCount; }
+
+    uint32 SelectThreadWithMinConnections() const
+    {
+        uint32 min = 0;
+
+        for (int32 i = 1; i < _threadCount; ++i)
+            if (_threads[i].GetConnectionCount() < _threads[min].GetConnectionCount())
+                min = i;
+
+        return min;
+    }
+
+    std::pair<IoContextTcpSocket*, uint32> GetSocketForAccept()
+    {
+        uint32 threadIndex = SelectThreadWithMinConnections();
+        return std::make_pair(_threads[threadIndex].GetSocketForAccept(), threadIndex);
+    }
+
+protected:
+    SocketMgr() : _threadCount(0)
+    {
+    }
+
+    virtual NetworkThread<SocketType>* CreateThreads() const = 0;
+
+    std::unique_ptr<AsyncAcceptor> _acceptor;
+    std::unique_ptr<NetworkThread<SocketType>[]> _threads;
+    int32 _threadCount;
+};
+}
+
+#endif // TRINITYCORE_SOCKET_MGR_H