Core/Network: Socket refactors

* Devirtualize calls to Read and Update by marking concrete implementations as final
* Removed derived class template argument
* Specialize boost::asio::basic_stream_socket for boost::asio::io_context instead of type-erased any_io_executor
* Make socket initialization easier composable (before entering Read loop)
* Remove use of deprecated boost::asio::null_buffers and boost::beast::ssl_stream

src/server/worldserver/RemoteAccess/RASession.cpp

@@ -29,9 +29,11 @@
 
 void RASession::Start()
 {
+    _socket.non_blocking(false);
+
     // wait 1 second for active connections to send negotiation request
     for (int counter = 0; counter < 10 && _socket.available() == 0; counter++)
-        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        std::this_thread::sleep_for(100ms);
 
     // Check if there are bytes available, if they are, then the client is requesting the negotiation
     if (_socket.available() > 0)

src/server/worldserver/RemoteAccess/RASession.h

@@ -15,10 +15,11 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __RASESSION_H__
-#define __RASESSION_H__
+#ifndef TRINITYCORE_RA_SESSION_H
+#define TRINITYCORE_RA_SESSION_H
 
 #include "Define.h"
+#include "Socket.h"
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/asio/streambuf.hpp>
 #include <future>
@@ -29,7 +30,7 @@ const size_t bufferSize = 4096;
 class RASession : public std::enable_shared_from_this <RASession>
 {
 public:
-    RASession(boost::asio::ip::tcp::socket&& socket) : _socket(std::move(socket)), _commandExecuting(nullptr)
+    RASession(Trinity::Net::IoContextTcpSocket&& socket) : _socket(std::move(socket)), _commandExecuting(nullptr)
     {
     }
 
@@ -47,7 +48,7 @@ private:
     static void CommandPrint(void* callbackArg, std::string_view text);
     static void CommandFinished(void* callbackArg, bool);
 
-    boost::asio::ip::tcp::socket _socket;
+    Trinity::Net::IoContextTcpSocket _socket;
     boost::asio::streambuf _readBuffer;
     boost::asio::streambuf _writeBuffer;
     std::promise<void>* _commandExecuting;