Ensured system socket binding is retried

If the process has just stopped when it restarts, the socket might not be able to bind straight away. It reattepts the bind every 10 seconds until the socket gets free'd for us again.

Author: Chris Board

MySQLManager-TunnelPlugin_C++/SocketListener.cpp

@@ -30,23 +30,32 @@ void SocketListener::startSocketListener()
 {
     try
     {
-	if (!this->socketManager.createSocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,
-		StaticSettings::AppSettings::listenSocket, 1024, "127.0.0.1"))
-	{
-	}
-	if (!this->socketManager.bindAndStartListening())
-	{
-	}
-        this->threadStarted = true;
-	this->threadSocketListener = thread(&SocketListener::socketListenerThread, this);
+		if (!this->socketManager.createSocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,
+			StaticSettings::AppSettings::listenSocket, 1024, "127.0.0.1"))
+		{
+			this->logger->writeToLog("Failed to prepare socket. Cannot continue");
+			return;
+		}
+	
+		if (!this->socketManager.bindAndStartListening())
+		{
+			this->logger->writeToLog("Failed to bind socket. Retrying in 10 seconds");
+			this_thread::sleep_for(chrono::seconds(10));
+			this->startSocketListener();
+		}
+		this->threadStarted = true;
+		this->threadSocketListener = thread(&SocketListener::socketListenerThread, this);
 
-	this->logger->writeToLog("Server socket has been successfully opened", "SocketListener", "startSocketListener");
+		this->logger->writeToLog("Server socket has been successfully opened", "SocketListener", "startSocketListener");
     }
     catch (SocketException ex)
     {
         stringstream logstream;
         logstream << "Failed to start socket listener. Error: " << ex.what();
         this->logger->writeToLog(logstream.str(), "SocketListener", "startSocketListener");
+		this->logger->writeToLog("Failed to bind socket. Retrying in 10 seconds");
+		this_thread::sleep_for(chrono::seconds(10));
+		this->startSocketListener();
     }
     catch (std::exception ex)
     {