added select() support to packet capturing

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20570 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/network/stack/link.cpp

@@ -45,7 +45,14 @@ link_monitor_data(void *cookie, net_buffer *packet)
 	if (buffer == NULL)
 		return B_NO_MEMORY;
 
-	return fifo_enqueue_buffer(&protocol->fifo, buffer);
+	status_t status = fifo_enqueue_buffer(&protocol->fifo, buffer);
+	if (status >= B_OK)
+		notify_socket(protocol->socket, B_SELECT_READ,
+						protocol->fifo.current_bytes);
+	else
+		gNetBufferModule.free(buffer);
+
+	return status;
 }