Always use non-blocking sockets

include/sockets.h

@@ -92,6 +92,16 @@ class CoreExport Socket : public Flags<SocketFlag, 1>
 	 */
 	int GetSock() const;
 
+	/** Mark a socket as blockig
+	 * @return true if the socket is now blocking
+	 */
+	bool SetBlocking();
+
+	/** Mark a socket as non-blocking
+	 * @return true if the socket is now non-blocking
+	 */
+	bool SetNonBlocking();
+
 	/** Check if this socket is IPv6
 	 * @return true or false
 	 */

modules/extra/m_ssl.cpp

@@ -31,6 +31,8 @@ class SSLSocket : public ClientSocket
  public:
 	SSLSocket(const std::string &nTargetHost, int nPort, const std::string &nBindHost = "", bool nIPv6 = false) : ClientSocket(nTargetHost, nPort, nBindHost, nIPv6)
 	{
+		this->SetBlocking();
+
 		sslsock = SSL_new(ctx);
 
 		if (!sslsock)
@@ -41,6 +43,8 @@ class SSLSocket : public ClientSocket
 		SSL_connect(sslsock);
 
 		UplinkSock = this;
+
+		this->SetNonBlocking();
 	}
 
 	~SSLSocket()

src/sockets.cpp

@@ -65,6 +65,34 @@ int Socket::GetSock() const
 	return sock;
 }
 
+/** Mark a socket as blockig
+ * @return true if the socket is now blocking
+ */
+bool Socket::SetBlocking()
+{
+#ifdef _WIN32
+	unsigned long opt = 0;
+	return !ioctlsocket(this->GetSock(), FIONBIO, &opt);
+#else
+	int flags = fcntl(this->GetSock(), F_GETFL, 0);
+	return !fcntl(this->GetSock(), F_SETFL, flags & ~O_NONBLOCK);
+#endif
+}
+
+/** Mark a socket as non-blocking
+ * @return true if the socket is now non-blocking
+ */
+bool Socket::SetNonBlocking()
+{
+#ifdef _WIN32
+	unsigned long opt = 0;
+	return !ioctlsocket(this->GetSock(), FIONBIO, &opt);
+#else
+	int flags = fcntl(this->GetSock(), F_GETFL, 0);
+	return !fcntl(this->GetSock(), F_SETFL, flags | O_NONBLOCK);
+#endif
+}
+
 /** Check if this socket is IPv6
  * @return true or false
  */
@@ -305,6 +333,8 @@ ClientSocket::ClientSocket(const std::string &nTargetHost, int nPort, const std:
 			throw SocketException("Error connecting to server: " + std::string(strerror(errno)));
 		}
 	}
+
+	this->SetNonBlocking();
 }
 
 /** Default destructor
@@ -375,6 +405,8 @@ ListenSocket::ListenSocket(const std::string &bindip, int port) : Socket(0, (bin
 	{
 		throw SocketException("Unable to listen: " + std::string(strerror(errno)));
 	}
+
+	this->SetNonBlocking();
 }
 
 /** Destructor