Added fr::TcpSocket::shutdown to shutdown a socket

include/frnetlib/TcpSocket.h

@@ -91,6 +91,16 @@ public:
      */
     int32_t get_socket_descriptor() const override;
 
+    /*!
+     * Calls the shutdown syscall on the socket.
+     * So you can receive data but not send.
+     *
+     * This can be called on a blocking socket to force
+     * it to immediately return (you might want to do this if
+     * you're exiting and need the blocking socket to return).
+     */
+    void shutdown();
+
 protected:
     std::string unprocessed_buffer;
     std::unique_ptr<char[]> recv_buffer;

src/TcpSocket.cpp

@@ -157,4 +157,9 @@ namespace fr
         return socket_descriptor;
     }
 
+    void TcpSocket::shutdown()
+    {
+        ::shutdown(socket_descriptor, 0);
+    }
+
 }