/**************************************************************************** * apps/netutils/netlib/netlib_getessid.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 #include #include #include #include #include #include #include #include #include #include "netutils/netlib.h" #ifdef CONFIG_NET /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: netlib_getessid * * Description: * Get the wireless access point ESSID * * Parameters: * ifname The name of the interface to use * essid Location to store the returned ESSID, size must be * IW_ESSID_MAX_SIZE + 1 or larger * idlen size of memory set asdie for the ESSID. * * Return: * 0 on success; -1 on failure (errno may not be set) * ****************************************************************************/ int netlib_getessid(FAR const char *ifname, FAR char *essid, size_t idlen) { int ret = ERROR; if (ifname != NULL && essid != NULL && idlen > IW_ESSID_MAX_SIZE) { /* Get a socket (only so that we get access to the INET subsystem) */ int sockfd = socket(NET_SOCK_FAMILY, NET_SOCK_TYPE, NET_SOCK_PROTOCOL); if (sockfd >= 0) { struct iwreq req; /* Put the driver name into the request */ memset(&req, 0, sizeof(struct iwreq)); strncpy(req.ifr_name, ifname, IFNAMSIZ); /* Put pointer to receive the ESSID into the request */ req.u.essid.pointer = (FAR void *)essid; /* Perform the ioctl to get the ESSID */ ret = ioctl(sockfd, SIOCGIWESSID, (unsigned long)&req); close(sockfd); } } return ret; } #endif /* CONFIG_NET */