zhhyu7 commented on code in PR #7571: URL: https://github.com/apache/incubator-nuttx/pull/7571#discussion_r1019789668
########## net/utils/net_bounddev.c: ########## @@ -0,0 +1,84 @@ +/**************************************************************************** + * net/utils/net_bounddev.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ +#include <nuttx/config.h> + +#include <nuttx/net/netdev.h> +#include <nuttx/net/net.h> + +#include "netdev/netdev.h" + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: net_bound_device + * + * Description: + * If the socket is bound to a device, return the reference to the + * bound device. + * + * Input Parameters: + * sconn - Socket connection structure (not currently used). + * + * Returned Value: + * A reference to the bound device. If the retained interface index no + * longer refers to a valid device, this function will unbind the device + * and return an arbitrary network device at the head of the list of + * registered devices. This supports legacy IPv4 DHCPD behavior when + * there is only a single registered network device. + * + ****************************************************************************/ + +#ifdef CONFIG_NET_BINDTODEVICE +FAR struct net_driver_s *net_bound_device(FAR struct socket_conn_s *sconn) +{ + FAR struct net_driver_s *dev = NULL; + + /* Is the socket bound to a device? */ + + if (sconn->s_boundto != 0) + { + /* Yes..This socket has been bound to an interface. Convert the + * interface index into a device structure reference. + */ + + dev = netdev_findbyindex(sconn->s_boundto); + if (dev == NULL) + { + /* No device? It must have been unregistered. Un-bind the + * socket. + */ + + sconn->s_boundto = 0; + } + } + + /* If no device was bound or the bound device is no longer valid, + * then let's try the default network device. + */ + + return dev == NULL ? netdev_default() : dev; Review Comment: If sconn->s_boundto == 0, the semantics will be different. I just move this code from udp field to common, I wonder if this suggestion can be kept for now? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
