/**************************************************************************** * net/netdev/netdev_ioctl.c * * SPDX-License-Identifier: Apache-2.0 * * 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 #include #include #include #include #include #ifdef CONFIG_NET_6LOWPAN # include #endif #include #include #ifdef CONFIG_NETDEV_WIRELESS_IOCTL # include #endif #ifdef CONFIG_WIRELESS_BLUETOOTH # include #endif #ifdef CONFIG_WIRELESS_IEEE802154 # include #endif #ifdef CONFIG_WIRELESS_PKTRADIO # include #endif #ifdef CONFIG_NET_CELLULAR # include #endif #ifdef CONFIG_NETDEV_MODEM_LTE_IOCTL # include #endif #include "arp/arp.h" #include "socket/socket.h" #include "netdev/netdev.h" #include "devif/devif.h" #include "igmp/igmp.h" #include "icmpv6/icmpv6.h" #include "route/route.h" #include "netlink/netlink.h" #include "utils/utils.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration */ #undef HAVE_WRITABLE_IPv4ROUTE #undef HAVE_WRITABLE_IPv6ROUTE #ifdef CONFIG_NET_ROUTE # if defined(CONFIG_NET_IPv4) && !defined(CONFIG_ROUTE_IPv4_ROMROUTE) # define HAVE_WRITABLE_IPv4ROUTE 1 # endif # if defined(CONFIG_NET_IPv6) && !defined(CONFIG_ROUTE_IPv6_ROMROUTE) # define HAVE_WRITABLE_IPv6ROUTE 1 # endif #endif #undef HAVE_IEEE802154_IOCTL #undef HAVE_PKTRADIO_IOCTL #undef HAVE_BLUETOOTH_IOCTL #ifdef CONFIG_NETDEV_IOCTL /* IEEE 802.15.4 6LoWPAN or raw packet support */ #if defined(CONFIG_NET_IEEE802154) || (defined(CONFIG_NET_6LOWPAN) && \ defined(CONFIG_WIRELESS_IEEE802154)) # define HAVE_IEEE802154_IOCTL 1 #endif /* pktradio raw packet support not implemented */ #if defined(CONFIG_NET_6LOWPAN) && defined(CONFIG_WIRELESS_PKTRADIO) # define HAVE_PKTRADIO_IOCTL 1 #endif /* Bluetooth 6LoWPAN support not implemented */ #if defined(CONFIG_NET_BLUETOOTH) # define HAVE_BLUETOOTH_IOCTL 1 #endif #endif /* CONFIG_NETDEV_IOCTL */ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: ioctl_add_ipv4route * * Description: * Add an IPv4 route to the routing table. * * Input Parameters: * rentry - Describes the route to be added * ****************************************************************************/ #ifdef HAVE_WRITABLE_IPv4ROUTE static int ioctl_add_ipv4route(FAR struct rtentry *rtentry) { FAR struct sockaddr_in *addr; in_addr_t target; in_addr_t netmask; in_addr_t router; addr = (FAR struct sockaddr_in *)&rtentry->rt_dst; target = (in_addr_t)addr->sin_addr.s_addr; addr = (FAR struct sockaddr_in *)&rtentry->rt_genmask; netmask = (in_addr_t)addr->sin_addr.s_addr; addr = (FAR struct sockaddr_in *)&rtentry->rt_gateway; router = (in_addr_t)addr->sin_addr.s_addr; return net_addroute_ipv4(target, netmask, router); } #endif /* HAVE_WRITABLE_IPv4ROUTE */ /**************************************************************************** * Name: ioctl_add_ipv6route * * Description: * Add an IPv6 route to the routing table. * * Input Parameters: * rentry - Describes the route to be added * ****************************************************************************/ #ifdef HAVE_WRITABLE_IPv6ROUTE static int ioctl_add_ipv6route(FAR struct rtentry *rtentry) { FAR struct sockaddr_in6 *target; FAR struct sockaddr_in6 *netmask; FAR struct sockaddr_in6 *gateway; net_ipv6addr_t router; target = (FAR struct sockaddr_in6 *)&rtentry->rt_dst; netmask = (FAR struct sockaddr_in6 *)&rtentry->rt_genmask; /* The router is an optional argument */ gateway = (FAR struct sockaddr_in6 *)&rtentry->rt_gateway; net_ipv6addr_copy(router, gateway->sin6_addr.s6_addr16); return net_addroute_ipv6(target->sin6_addr.s6_addr16, netmask->sin6_addr.s6_addr16, router); } #endif /* HAVE_WRITABLE_IPv6ROUTE */ /**************************************************************************** * Name: ioctl_del_ipv4route * * Description: * Delete an IPv4 route to the routing table. * * Input Parameters: * rentry - Describes the route to be deleted * ****************************************************************************/ #ifdef HAVE_WRITABLE_IPv4ROUTE static int ioctl_del_ipv4route(FAR struct rtentry *rtentry) { FAR struct sockaddr_in *addr; in_addr_t target; in_addr_t netmask; addr = (FAR struct sockaddr_in *)&rtentry->rt_dst; target = (in_addr_t)addr->sin_addr.s_addr; addr = (FAR struct sockaddr_in *)&rtentry->rt_genmask; netmask = (in_addr_t)addr->sin_addr.s_addr; return net_delroute_ipv4(target, netmask); } #endif /* HAVE_WRITABLE_IPv4ROUTE */ /**************************************************************************** * Name: ioctl_del_ipv6route * * Description: * Delete an IPv6 route to the routing table. * * Input Parameters: * rentry - Describes the route to be deleted * ****************************************************************************/ #ifdef HAVE_WRITABLE_IPv6ROUTE static int ioctl_del_ipv6route(FAR struct rtentry *rtentry) { FAR struct sockaddr_in6 *target; FAR struct sockaddr_in6 *netmask; target = (FAR struct sockaddr_in6 *)&rtentry->rt_dst; netmask = (FAR struct sockaddr_in6 *)&rtentry->rt_genmask; return net_delroute_ipv6(target->sin6_addr.s6_addr16, netmask->sin6_addr.s6_addr16); } #endif /* HAVE_WRITABLE_IPv6ROUTE */ /**************************************************************************** * Name: ioctl_get_ipv4addr * * Description: * Copy IP addresses from device structure to user memory. * * Input Parameters: * outaddr - Pointer to the user-provided memory to receive the address. * inaddr - The source IP address in the device structure. * ****************************************************************************/ #ifdef CONFIG_NET_IPv4 static void ioctl_get_ipv4addr(FAR struct sockaddr *outaddr, in_addr_t inaddr) { FAR struct sockaddr_in *dest = (FAR struct sockaddr_in *)outaddr; dest->sin_family = AF_INET; dest->sin_port = 0; dest->sin_addr.s_addr = inaddr; memset(dest->sin_zero, 0, sizeof(dest->sin_zero)); } #endif /**************************************************************************** * Name: ioctl_get_ipv4broadcast * * Description: * Return the sub-net broadcast address to user memory. * * Input Parameters: * outaddr - Pointer to the user-provided memory to receive the address. * inaddr - The source IP address in the device structure. * netmask - The netmask address mask in the device structure. * ****************************************************************************/ #ifdef CONFIG_NET_IPv4 static void ioctl_get_ipv4broadcast(FAR struct sockaddr *outaddr, in_addr_t inaddr, in_addr_t netmask) { FAR struct sockaddr_in *dest = (FAR struct sockaddr_in *)outaddr; dest->sin_family = AF_INET; dest->sin_port = 0; dest->sin_addr.s_addr = net_ipv4addr_broadcast(inaddr, netmask); memset(dest->sin_zero, 0, sizeof(dest->sin_zero)); } #endif /**************************************************************************** * Name: ioctl_get_ipv6addr * * Description: * Copy IP addresses from device structure to user memory. * * Input Parameters: * outaddr - Pointer to the user-provided memory to receive the address. * inaddr - The source IP address in the device structure. * ****************************************************************************/ #ifdef CONFIG_NET_IPv6 static void ioctl_get_ipv6addr(FAR struct sockaddr_storage *outaddr, FAR const net_ipv6addr_t inaddr) { FAR struct sockaddr_in6 *dest = (FAR struct sockaddr_in6 *)outaddr; dest->sin6_family = AF_INET6; dest->sin6_port = 0; memcpy(dest->sin6_addr.in6_u.u6_addr8, inaddr, 16); } #endif /**************************************************************************** * Name: ioctl_set_ipv4addr * * Description: * Copy IP addresses from user memory into the device structure * * Input Parameters: * outaddr - Pointer to the source IP address in the device structure. * inaddr - Pointer to the user-provided memory to containing the new IP * address. * ****************************************************************************/ #ifdef CONFIG_NET_IPv4 static void ioctl_set_ipv4addr(FAR in_addr_t *outaddr, FAR const struct sockaddr *inaddr) { FAR const struct sockaddr_in *src = (FAR const struct sockaddr_in *)inaddr; *outaddr = src->sin_addr.s_addr; } #endif /**************************************************************************** * Name: ioctl_set_ipv6addr * * Description: * Copy IP addresses from user memory into the device structure * * Input Parameters: * outaddr - Pointer to the source IP address in the device structure. * inaddr - Pointer to the user-provided memory to containing the new IP * address. * ****************************************************************************/ #ifdef CONFIG_NET_IPv6 static void ioctl_set_ipv6addr(FAR net_ipv6addr_t outaddr, FAR const struct sockaddr_storage *inaddr) { FAR const struct sockaddr_in6 *src = (FAR const struct sockaddr_in6 *)inaddr; memcpy(outaddr, src->sin6_addr.in6_u.u6_addr8, 16); } #endif /**************************************************************************** * Name: netdev_bluetooth_ioctl * * Description: * Perform Bluetooth network device specific operations. * * Input Parameters: * psock - Socket structure * dev - Ethernet driver device structure * cmd - The ioctl command * req - The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef HAVE_BLUETOOTH_IOCTL static int netdev_bluetooth_ioctl(FAR struct socket *psock, int cmd, unsigned long arg) { FAR struct net_driver_s *dev; FAR char *ifname; int ret = -EINVAL; if (arg != 0ul) { if (_BLUETOOTHIOCVALID(cmd)) { /* Get the name of the Bluetooth device to receive the IOCTL * command */ FAR struct btreq_s *btreq = (FAR struct btreq_s *)((uintptr_t)arg); ifname = btreq->btr_name; } else { /* Not a Bluetooth IOCTL command */ return -ENOTTY; } /* Find the device with this name */ dev = netdev_findbyname(ifname); ret = -ENODEV; if (dev != NULL && dev->d_lltype == NET_LL_BLUETOOTH) { /* Perform the device IOCTL */ ret = dev->d_ioctl(dev, cmd, arg); } } return ret; } #endif /**************************************************************************** * Name: netdev_iee802154_ioctl * * Description: * Perform IEEE802.15.4 network device specific operations. * * Input Parameters: * psock - Socket structure * dev - Ethernet driver device structure * cmd - The ioctl command * req - The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef HAVE_IEEE802154_IOCTL static int netdev_iee802154_ioctl(FAR struct socket *psock, int cmd, unsigned long arg) { FAR struct net_driver_s *dev; FAR char *ifname; int ret = -ENOTTY; if (arg != 0ul) { if (_MAC802154IOCVALID(cmd)) { /* Get the IEEE802.15.4 MAC device to receive the radio IOCTL * command */ FAR struct ieee802154_netmac_s *netmac = (FAR struct ieee802154_netmac_s *)((uintptr_t)arg); ifname = netmac->ifr_name; } else { /* Not an EEE802.15.4 MAC IOCTL command */ return -ENOTTY; } /* Find the device with this name */ dev = netdev_findbyname(ifname); if (dev != NULL && dev->d_lltype == NET_LL_IEEE802154) { /* Perform the device IOCTL */ ret = dev->d_ioctl(dev, cmd, arg); } } return ret; } #endif /* HAVE_IEEE802154_IOCTL */ /**************************************************************************** * Name: netdev_pktradio_ioctl * * Description: * Perform non-IEEE802.15.4 packet radio network device specific operation. * * Input Parameters: * psock - Socket structure * dev - Ethernet driver device structure * cmd - The ioctl command * req - The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef HAVE_PKTRADIO_IOCTL static int netdev_pktradio_ioctl(FAR struct socket *psock, int cmd, unsigned long arg) { FAR struct net_driver_s *dev; FAR char *ifname; int ret = -ENOTTY; if (arg != 0ul) { if (_PKRADIOIOCVALID(cmd)) { /* Get the packet radio device to receive the radio IOCTL * command */ FAR struct pktradio_ifreq_s *cmddata = (FAR struct pktradio_ifreq_s *)((uintptr_t)arg); ifname = cmddata->pifr_name; } else { /* Not a packet radio IOCTL command */ nwarn("WARNING: Not a packet radio IOCTL command: %d\n", cmd); return -ENOTTY; } /* Find the device with this name */ dev = netdev_findbyname(ifname); if (dev != NULL && dev->d_lltype == NET_LL_PKTRADIO) { /* Perform the device IOCTL */ ret = dev->d_ioctl(dev, cmd, arg); } } return ret; } #endif /* HAVE_PKTRADIO_IOCTL */ /**************************************************************************** * Name: netdev_cell_ioctl * * Description: * Perform cell ioctl operations. * * Parameters: * psock Socket structure * cmd The ioctl command * arg The argument of the ioctl cmd * * Return: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NET_CELLULAR) static int netdev_cell_ioctl(FAR struct socket *psock, int cmd, FAR struct icellreq *req) { FAR struct net_driver_s *dev = NULL; int ret = -ENOTTY; ninfo("cmd: %d\n", cmd); net_lock(); if (_CELLIOCVALID(cmd)) { dev = netdev_findbyname(req->ifr_name); if (dev && dev->d_ioctl) { ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)req); } } net_unlock(); return ret; } #endif /**************************************************************************** * Name: netdev_wifr_ioctl * * Description: * Perform wireless network device specific operations. * * Input Parameters: * psock Socket structure * dev Ethernet driver device structure * cmd The ioctl command * req The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NETDEV_WIRELESS_IOCTL) static int netdev_wifr_ioctl(FAR struct socket *psock, int cmd, FAR struct iwreq *req) { FAR struct net_driver_s *dev; int ret = -ENOTTY; /* Verify that this is a valid wireless network IOCTL command */ if (_WLIOCVALID(cmd)) { /* Get the wireless device associated with the IOCTL command */ dev = netdev_findbyname(req->ifr_name); if (cmd == SIOCGIWNAME) { if (dev == NULL) { ret = -ENODEV; } else { strcpy((FAR char *)&req->u, "IEEE 802.11"); ret = OK; } } if (dev != NULL && ret == -ENOTTY) { /* Just forward the IOCTL to the wireless driver */ ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)req); } } return ret; } #endif /**************************************************************************** * Name: netdev_ifr_split_idx * * Description: * Split the address index from device name like 'eth0:0'. * * Input Parameters: * req - The argument of the ioctl cmd * * Returned Value: * The address index from device name. * ****************************************************************************/ static unsigned int netdev_ifr_split_idx(FAR struct ifreq *req) { FAR char *colon = strchr(req->ifr_name, ':'); int idx; if (colon) { *colon++ = '\0'; /* Remove suffix from device name */ idx = atoi(colon); return idx >= 0 ? idx + 1 : 0; /* eth0:0 represents the second addr */ } return 0; } /**************************************************************************** * Name: net_ioctl_ifreq_arglen * * Description: * Calculate the ioctl argument buffer length of ifreq. * * Input Parameters: * domain The socket domain * cmd The ioctl command * * Returned Value: * The argument buffer length, or error code. * ****************************************************************************/ static ssize_t net_ioctl_ifreq_arglen(uint8_t domain, int cmd) { switch (cmd) { case SIOCGIFADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCSIFMTU: case SIOCGIFMTU: case SIOCGIFHWADDR: case SIOCSIFHWADDR: case SIOCGIFCOUNT: case SIOCSIFFLAGS: case SIOCGIFFLAGS: case SIOCMIINOTIFY: case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: case SIOCGCANBITRATE: case SIOCSCANBITRATE: case SIOCACANEXTFILTER: case SIOCDCANEXTFILTER: case SIOCACANSTDFILTER: case SIOCDCANSTDFILTER: case SIOCCANRECOVERY: case SIOCSIFNAME: case SIOCGIFNAME: case SIOCGIFINDEX: return sizeof(struct ifreq); case SIOCSIFADDR: case SIOCDIFADDR: return domain == PF_INET6 ? sizeof(struct in6_ifreq) : sizeof(struct ifreq); case SIOCGLIFADDR: case SIOCSLIFADDR: case SIOCGLIFDSTADDR: case SIOCSLIFDSTADDR: case SIOCGLIFBRDADDR: case SIOCSLIFBRDADDR: case SIOCGLIFNETMASK: case SIOCSLIFNETMASK: case SIOCGLIFMTU: case SIOCIFAUTOCONF: return sizeof(struct lifreq); default: break; } return -ENOTTY; } /**************************************************************************** * Name: netdev_ifr_ioctl * * Description: * Perform network device specific operations. * * Input Parameters: * psock Socket structure * cmd The ioctl command * req The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ static int netdev_ifr_ioctl(FAR struct socket *psock, int cmd, FAR struct ifreq *req) { FAR struct net_driver_s *dev = NULL; unsigned int idx = 0; int ret = OK; ninfo("cmd: %d\n", cmd); net_lock(); /* Execute commands that do not need ifr_name or lifr_name */ switch (cmd) { case SIOCGIFCOUNT: /* Get number of devices */ req->ifr_count = netdev_count(); break; #ifdef CONFIG_NET_IPv4 case SIOCGIFCONF: /* Return an interface list (IPv4) */ ret = netdev_ipv4_ifconf((FAR struct ifconf *)req); break; #endif #ifdef CONFIG_NET_IPv6 case SIOCGLIFCONF: /* Return an interface list (IPv6) */ ret = netdev_ipv6_ifconf((FAR struct lifconf *)req); break; #endif #ifdef CONFIG_NETDEV_IFINDEX case SIOCSIFNAME: /* Set interface name */ { FAR struct net_driver_s *tmpdev; tmpdev = netdev_findbyindex(req->ifr_ifindex); if (tmpdev != NULL) { strlcpy(tmpdev->d_ifname, req->ifr_name, IFNAMSIZ); } else { ret = -ENODEV; } } break; case SIOCGIFNAME: /* Get interface name */ { FAR struct net_driver_s *tmpdev; tmpdev = netdev_findbyindex(req->ifr_ifindex); if (tmpdev != NULL) { strlcpy(req->ifr_name, tmpdev->d_ifname, IFNAMSIZ); } else { ret = -ENODEV; } } break; #endif default: if (req == NULL) { net_unlock(); return -ENOTTY; } if (net_ioctl_ifreq_arglen(psock->s_domain, cmd) >= (ssize_t)sizeof(struct ifreq)) { idx = netdev_ifr_split_idx(req); UNUSED(idx); dev = netdev_findbyname(req->ifr_name); } else if (net_ioctl_ifreq_arglen(psock->s_domain, cmd) == (ssize_t)sizeof(struct in6_ifreq)) { FAR struct in6_ifreq *ifr6 = (FAR struct in6_ifreq *)req; dev = netdev_findbyindex(ifr6->ifr6_ifindex); } if (dev == NULL) { ret = -ENOTTY; } break; } if (dev == NULL) { net_unlock(); return ret; } /* Execute commands that need ifr_name or lifr_name */ switch (cmd) { #ifdef CONFIG_NET_IPv4 case SIOCGIFADDR: /* Get IP address */ ioctl_get_ipv4addr(&req->ifr_addr, dev->d_ipaddr); break; case SIOCGIFDSTADDR: /* Get P-to-P address */ ioctl_get_ipv4addr(&req->ifr_dstaddr, dev->d_draddr); break; case SIOCSIFDSTADDR: /* Set P-to-P address */ ioctl_set_ipv4addr(&dev->d_draddr, &req->ifr_dstaddr); break; case SIOCGIFBRDADDR: /* Get broadcast IP address */ ioctl_get_ipv4broadcast(&req->ifr_broadaddr, dev->d_ipaddr, dev->d_netmask); break; case SIOCSIFBRDADDR: /* Set broadcast IP address */ ret = -ENOSYS; break; case SIOCGIFNETMASK: /* Get network mask */ ioctl_get_ipv4addr(&req->ifr_addr, dev->d_netmask); break; case SIOCSIFNETMASK: /* Set network mask */ ioctl_set_ipv4addr(&dev->d_netmask, &req->ifr_addr); break; #endif #ifdef CONFIG_NET_IPv6 case SIOCGLIFADDR: /* Get IP address */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; idx = MIN(idx, CONFIG_NETDEV_MAX_IPv6_ADDR - 1); ioctl_get_ipv6addr(&lreq->lifr_addr, dev->d_ipv6[idx].addr); } break; case SIOCSLIFADDR: /* Set IP address */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; idx = MIN(idx, CONFIG_NETDEV_MAX_IPv6_ADDR - 1); netdev_ipv6_removemcastmac(dev, dev->d_ipv6[idx].addr); ioctl_set_ipv6addr(dev->d_ipv6[idx].addr, &lreq->lifr_addr); netdev_ipv6_addmcastmac(dev, dev->d_ipv6[idx].addr); netlink_device_notify_ipaddr(dev, RTM_NEWADDR, AF_INET6, dev->d_ipv6[idx].addr, net_ipv6_mask2pref(dev->d_ipv6[idx].mask)); } break; case SIOCGLIFDSTADDR: /* Get P-to-P address */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; ioctl_get_ipv6addr(&lreq->lifr_dstaddr, dev->d_ipv6draddr); } break; case SIOCSLIFDSTADDR: /* Set P-to-P address */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; ioctl_set_ipv6addr(dev->d_ipv6draddr, &lreq->lifr_dstaddr); } break; case SIOCGLIFBRDADDR: /* Get broadcast IP address */ case SIOCSLIFBRDADDR: /* Set broadcast IP address */ ret = -ENOSYS; break; case SIOCGLIFNETMASK: /* Get network mask */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; idx = MIN(idx, CONFIG_NETDEV_MAX_IPv6_ADDR - 1); ioctl_get_ipv6addr(&lreq->lifr_addr, dev->d_ipv6[idx].mask); } break; case SIOCSLIFNETMASK: /* Set network mask */ { FAR struct lifreq *lreq = (FAR struct lifreq *)req; idx = MIN(idx, CONFIG_NETDEV_MAX_IPv6_ADDR - 1); ioctl_set_ipv6addr(dev->d_ipv6[idx].mask, &lreq->lifr_addr); } break; #endif case SIOCGLIFMTU: /* Get MTU size */ case SIOCGIFMTU: /* Get MTU size */ req->ifr_mtu = NETDEV_PKTSIZE(dev) - dev->d_llhdrlen; break; case SIOCSIFMTU: /* Set MTU size */ NETDEV_PKTSIZE(dev) = req->ifr_mtu + dev->d_llhdrlen; break; #ifdef CONFIG_NET_ICMPv6_AUTOCONF case SIOCIFAUTOCONF: /* Perform ICMPv6 auto-configuration */ ret = icmpv6_autoconfig(dev); break; #endif case SIOCSIFFLAGS: /* Sets the interface flags */ /* Is this a request to bring the interface up? */ if ((req->ifr_flags & IFF_UP) != 0) { /* Yes.. bring the interface up */ ret = netdev_ifup(dev); #ifdef CONFIG_NET_ARP_ACD /* having address then start acd */ arp_acd_setup(dev); #endif /* CONFIG_NET_ARP_ACD */ } else { /* Yes.. take the interface down */ ret = netdev_ifdown(dev); } break; case SIOCGIFFLAGS: /* Gets the interface flags */ req->ifr_flags = dev->d_flags; break; /* MAC address operations only make sense if Ethernet or 6LoWPAN are * supported. */ #if defined(CONFIG_NET_ETHERNET) || defined(CONFIG_NET_6LOWPAN) case SIOCGIFHWADDR: /* Get hardware address */ #ifdef CONFIG_NET_ETHERNET if (dev->d_lltype == NET_LL_ETHERNET || dev->d_lltype == NET_LL_IEEE80211) { req->ifr_hwaddr.sa_family = ARPHRD_ETHER; memcpy(req->ifr_hwaddr.sa_data, dev->d_mac.ether.ether_addr_octet, IFHWADDRLEN); } else #endif #ifdef CONFIG_NET_6LOWPAN if (dev->d_lltype == NET_LL_IEEE802154 || dev->d_lltype == NET_LL_PKTRADIO) { req->ifr_hwaddr.sa_family = ARPHRD_IEEE802154; memcpy(req->ifr_hwaddr.sa_data, dev->d_mac.radio.nv_addr, dev->d_mac.radio.nv_addrlen); } else #endif { nwarn("WARNING: Unsupported link layer\n"); ret = -EAFNOSUPPORT; } break; case SIOCSIFHWADDR: /* Set hardware address -- will not take effect until ifup */ #ifdef CONFIG_NET_ETHERNET if (dev->d_lltype == NET_LL_ETHERNET || dev->d_lltype == NET_LL_IEEE80211) { memcpy(dev->d_mac.ether.ether_addr_octet, req->ifr_hwaddr.sa_data, IFHWADDRLEN); } else #endif #ifdef CONFIG_NET_6LOWPAN if (dev->d_lltype == NET_LL_IEEE802154 || dev->d_lltype == NET_LL_PKTRADIO) { FAR struct radio_driver_s *radio; struct radiodev_properties_s properties; /* Get the radio properties */ radio = (FAR struct radio_driver_s *)dev; DEBUGASSERT(radio->r_properties != NULL); ret = radio->r_properties(radio, &properties); if (ret >= 0) { dev->d_mac.radio.nv_addrlen = properties.sp_addrlen; DEBUGASSERT(dev->d_mac.radio.nv_addrlen <= sizeof(dev->d_mac.radio.nv_addr)); DEBUGASSERT(dev->d_mac.radio.nv_addrlen <= sizeof(req->ifr_hwaddr.sa_data)); memcpy(dev->d_mac.radio.nv_addr, req->ifr_hwaddr.sa_data, dev->d_mac.radio.nv_addrlen); } } else #endif { nerr("Unsupported link layer\n"); ret = -EAFNOSUPPORT; } break; #endif case SIOCSIFADDR: /* Set IP address */ #ifdef CONFIG_NET_IPv4 if (psock->s_domain != PF_INET6) { if (net_ipv4addr_cmp(dev->d_ipaddr, ((FAR struct sockaddr_in *)&req->ifr_addr)->sin_addr.s_addr)) { break; } ioctl_set_ipv4addr(&dev->d_ipaddr, &req->ifr_addr); netlink_device_notify_ipaddr(dev, RTM_NEWADDR, AF_INET, &dev->d_ipaddr, net_ipv4_mask2pref(dev->d_netmask)); #ifdef CONFIG_NET_ARP_ACD arp_acd_set_addr(dev); #endif /* CONFIG_NET_ARP_ACD */ } #endif #ifdef CONFIG_NET_IPv6 if (psock->s_domain == PF_INET6) { FAR struct in6_ifreq *ifr6 = (FAR struct in6_ifreq *)req; ret = netdev_ipv6_add(dev, ifr6->ifr6_addr.in6_u.u6_addr16, ifr6->ifr6_prefixlen); if (ret == OK) { netlink_device_notify_ipaddr(dev, RTM_NEWADDR, AF_INET6, ifr6->ifr6_addr.in6_u.u6_addr16, ifr6->ifr6_prefixlen); } } #endif break; case SIOCDIFADDR: /* Delete IP address */ #ifdef CONFIG_NET_IPv4 if (psock->s_domain != PF_INET6) { netlink_device_notify_ipaddr(dev, RTM_DELADDR, AF_INET, &dev->d_ipaddr, net_ipv4_mask2pref(dev->d_netmask)); dev->d_ipaddr = 0; } #endif #ifdef CONFIG_NET_IPv6 if (psock->s_domain == PF_INET6) { FAR struct in6_ifreq *ifr6 = (FAR struct in6_ifreq *)req; ret = netdev_ipv6_del(dev, ifr6->ifr6_addr.in6_u.u6_addr16, ifr6->ifr6_prefixlen); if (ret == OK) { netlink_device_notify_ipaddr(dev, RTM_DELADDR, AF_INET6, ifr6->ifr6_addr.in6_u.u6_addr16, ifr6->ifr6_prefixlen); } } #endif break; #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NETDEV_PHY_IOCTL) #ifdef CONFIG_ARCH_PHY_INTERRUPT case SIOCMIINOTIFY: /* Set up for PHY event notifications */ if (dev->d_ioctl) { FAR struct mii_ioctl_notify_s *notify = &req->ifr_ifru.ifru_mii_notify; ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)notify); } else { ret = -ENOSYS; } break; #endif case SIOCGMIIPHY: /* Get address of MII PHY in use */ case SIOCGMIIREG: /* Get MII register via MDIO */ case SIOCSMIIREG: /* Set MII register via MDIO */ if (dev->d_ioctl) { FAR struct mii_ioctl_data_s *mii_data = &req->ifr_ifru.ifru_mii_data; ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)mii_data); } else { ret = -ENOSYS; } break; #endif #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NETDEV_CAN_BITRATE_IOCTL) case SIOCGCANBITRATE: /* Get bitrate from a CAN controller */ case SIOCSCANBITRATE: /* Set bitrate of a CAN controller */ if (dev->d_ioctl) { FAR struct can_ioctl_data_s *can_bitrate_data = &req->ifr_ifru.ifru_can_data; ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)can_bitrate_data); } else { ret = -ENOSYS; } break; #endif #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NETDEV_CAN_FILTER_IOCTL) case SIOCACANEXTFILTER: /* Add an extended-ID filter */ case SIOCDCANEXTFILTER: /* Delete an extended-ID filter */ case SIOCACANSTDFILTER: /* Add a standard-ID filter */ case SIOCDCANSTDFILTER: /* Delete a standard-ID filter */ case SIOCCANRECOVERY: /* Recovery can controller when bus-off */ if (dev->d_ioctl) { FAR struct can_ioctl_filter_s *can_filter = &req->ifr_ifru.ifru_can_filter; ret = dev->d_ioctl(dev, cmd, (unsigned long)(uintptr_t)can_filter); } else { ret = -ENOSYS; } break; #endif #ifdef CONFIG_NETDEV_IFINDEX case SIOCGIFINDEX: /* Index to name mapping */ req->ifr_ifindex = dev->d_ifindex; break; #endif default: ret = -ENOTTY; break; } net_unlock(); return ret; } /**************************************************************************** * Name: netdev_imsfdev * * Description: * Verify the struct ip_msfilter and get the Ethernet device. * * Input Parameters: * req - The argument of the ioctl cmd * * Returned Value: * A pointer to the driver structure on success; NULL on failure. * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static FAR struct net_driver_s *netdev_imsfdev(FAR struct ip_msfilter *imsf) { if (imsf == NULL) { return NULL; } /* Find the network device associated with the address of the IP address * of the local device. */ return netdev_findby_lipv4addr(imsf->imsf_interface.s_addr); } #endif /**************************************************************************** * Name: netdev_imsf_ioctl * * Description: * Perform network device specific operations. * * Input Parameters: * psock Socket structure * dev Ethernet driver device structure * cmd The ioctl command * imsf The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static int netdev_imsf_ioctl(FAR struct socket *psock, int cmd, FAR struct ip_msfilter *imsf) { FAR struct net_driver_s *dev; int ret = -EINVAL; ninfo("cmd: %d\n", cmd); net_lock(); /* Execute the command */ switch (cmd) { case SIOCSIPMSFILTER: /* Set source filter content */ { dev = netdev_imsfdev(imsf); if (dev) { if (imsf->imsf_fmode == MCAST_INCLUDE) { ret = igmp_joingroup(dev, &imsf->imsf_multiaddr); } else { DEBUGASSERT(imsf->imsf_fmode == MCAST_EXCLUDE); ret = igmp_leavegroup(dev, &imsf->imsf_multiaddr); } } } break; case SIOCGIPMSFILTER: /* Retrieve source filter addresses */ default: ret = -ENOTTY; break; } net_unlock(); return ret; } #endif /**************************************************************************** * Name: ioctl_arpreq_parse * * Description: * Parse arpreq into netdev and sockaddr. * * Input Parameters: * req The argument of the ioctl cmd * dev The pointer to get ethernet driver device structure * addr The pointer to get address in the request * * Returned Value: * true on success and false on failure. * ****************************************************************************/ #ifdef CONFIG_NET_ARP static bool ioctl_arpreq_parse(FAR struct arpreq *req, FAR struct net_driver_s **dev, FAR struct sockaddr_in **addr) { if (req != NULL) { *addr = (FAR struct sockaddr_in *)&req->arp_pa; *dev = req->arp_dev[0] != '\0' ? netdev_findbyname((FAR const char *)req->arp_dev) : netdev_findby_ripv4addr(INADDR_ANY, (*addr)->sin_addr.s_addr); return true; } return false; } #endif /**************************************************************************** * Name: netdev_arp_ioctl * * Description: * Perform ARP table specific operations. * * Input Parameters: * psock Socket structure * dev Ethernet driver device structure * cmd The ioctl command * req The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef CONFIG_NET_ARP static int netdev_arp_ioctl(FAR struct socket *psock, int cmd, FAR struct arpreq *req) { FAR struct net_driver_s *dev; FAR struct sockaddr_in *addr; int ret; /* Execute the command */ switch (cmd) { case SIOCSARP: /* Set an ARP mapping */ { if (ioctl_arpreq_parse(req, &dev, &addr) && dev != NULL && req->arp_pa.sa_family == AF_INET && req->arp_ha.sa_family == ARPHRD_ETHER) { /* Update any existing ARP table entry for this protocol * address -OR- add a new ARP table entry if there is not. */ ret = arp_update(dev, addr->sin_addr.s_addr, (FAR const uint8_t *)req->arp_ha.sa_data); } else { ret = -EINVAL; } } break; case SIOCDARP: /* Delete an ARP mapping */ { if (ioctl_arpreq_parse(req, &dev, &addr) && dev != NULL && req->arp_pa.sa_family == AF_INET) { /* Delete the ARP entry for this protocol address. */ ret = arp_delete(addr->sin_addr.s_addr, dev); } else { ret = -EINVAL; } } break; case SIOCGARP: /* Get an ARP mapping */ { if (ioctl_arpreq_parse(req, &dev, &addr) && req->arp_pa.sa_family == AF_INET) { ret = arp_find(addr->sin_addr.s_addr, (FAR uint8_t *)req->arp_ha.sa_data, dev); if (ret >= 0) { /* Return the mapped hardware address. */ req->arp_ha.sa_family = ARPHRD_ETHER; ret = OK; } } else { ret = -EINVAL; } } break; default: ret = -ENOTTY; break; } return ret; } #endif /**************************************************************************** * Name: netdev_rt_ioctl * * Description: * Perform routing table specific operations. * * Input Parameters: * psock Socket structure * dev Ethernet driver device structure * cmd The ioctl command * rtentry The argument of the ioctl cmd * * Returned Value: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ #ifdef CONFIG_NET_ROUTE static int netdev_rt_ioctl(FAR struct socket *psock, int cmd, FAR struct rtentry *rtentry) { int ret = -EAFNOSUPPORT; /* Execute the command */ switch (cmd) { case SIOCADDRT: /* Add an entry to the routing table */ { /* The target address and the netmask are required values */ if (rtentry == NULL) { return -EINVAL; } #ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv6 if (rtentry->rt_dst.ss_family == AF_INET) #endif { #ifdef HAVE_WRITABLE_IPv4ROUTE ret = ioctl_add_ipv4route(rtentry); #else ret = -EACCES; #endif } #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv4 else #endif { #ifdef HAVE_WRITABLE_IPv6ROUTE ret = ioctl_add_ipv6route(rtentry); #else ret = -EACCES; #endif } #endif /* CONFIG_NET_IPv6 */ } break; case SIOCDELRT: /* Delete an entry from the routing table */ { /* The target address and the netmask are required values */ if (rtentry == NULL) { return -EINVAL; } #ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv6 if (rtentry->rt_dst.ss_family == AF_INET) #endif { #ifdef HAVE_WRITABLE_IPv4ROUTE ret = ioctl_del_ipv4route(rtentry); #else ret = -EACCES; #endif } #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv4 else #endif { #ifdef HAVE_WRITABLE_IPv6ROUTE ret = ioctl_del_ipv6route(rtentry); #else ret = -EACCES; #endif } #endif /* CONFIG_NET_IPv6 */ } break; default: ret = -ENOTTY; break; } return ret; } #endif /**************************************************************************** * Name: netdev_ioctl * * Description: * Perform user private ioctl operations. * * Parameters: * psock Socket structure * cmd The ioctl command * arg The argument of the ioctl cmd * * Return: * >=0 on success (positive non-zero values are cmd-specific) * Negated errno returned on failure. * ****************************************************************************/ static int netdev_ioctl(FAR struct socket *psock, int cmd, unsigned long arg) { int ret = -ENOTTY; if (psock->s_sockif && psock->s_sockif->si_ioctl) { ret = psock->s_sockif->si_ioctl(psock, cmd, arg); } if (ret != OK && ret != -ENOTTY) { return ret; } switch (cmd) { case FIONBIO: { FAR struct socket_conn_s *conn = psock->s_conn; FAR int *nonblock = (FAR int *)(uintptr_t)arg; sockcaps_t sockcaps; /* Non-blocking is the only configurable option. And it applies * only Unix domain sockets and to read operations on TCP/IP * and UDP/IP sockets when read-ahead is enabled. */ DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_sockcaps != NULL); sockcaps = psock->s_sockif->si_sockcaps(psock); if ((sockcaps & SOCKCAP_NONBLOCKING) != 0) { if (nonblock && *nonblock) { conn->s_flags |= _SF_NONBLOCK; } else { conn->s_flags &= ~_SF_NONBLOCK; } ret = OK; } else { nerr("ERROR: Non-blocking not supported for this socket\n"); ret = -ENOSYS; } } break; case FIOC_FILEPATH: if (ret == -ENOTTY) { snprintf((FAR char *)(uintptr_t)arg, PATH_MAX, "socket:[" "domain %" PRIu8 ", type %" PRIu8 ", proto %" PRIu8 "]", psock->s_domain, psock->s_type, psock->s_proto); ret = OK; } break; default: break; } return ret; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: net_ioctl_arglen * * Description: * Calculate the ioctl argument buffer length. * * Input Parameters: * domain The socket domain * cmd The ioctl command * * Returned Value: * The argument buffer length, or error code. * ****************************************************************************/ ssize_t net_ioctl_arglen(uint8_t domain, int cmd) { ssize_t arglen; arglen = net_ioctl_ifreq_arglen(domain, cmd); if (arglen > 0) { return arglen; } switch (cmd) { case FIONBIO: case FIONSPACE: case FIONREAD: return sizeof(int); case FIOC_FILEPATH: return PATH_MAX; case SIOCGIFCONF: return sizeof(struct ifconf); case SIOCGLIFCONF: return sizeof(struct lifconf); case SIOCGIPMSFILTER: case SIOCSIPMSFILTER: return sizeof(struct ip_msfilter); case SIOCSARP: case SIOCDARP: case SIOCGARP: return sizeof(struct arpreq); case SIOCADDRT: case SIOCDELRT: return sizeof(struct rtentry); case SIOCDENYINETSOCK: return sizeof(uint8_t); default: #ifdef CONFIG_NETDEV_IOCTL # ifdef CONFIG_NETDEV_WIRELESS_IOCTL if (_WLIOCVALID(cmd)) { return sizeof(struct iwreq); } # endif # ifdef CONFIG_WIRELESS_IEEE802154 if (_MAC802154IOCVALID(cmd)) { return sizeof(struct ieee802154_netmac_s); } # endif # ifdef CONFIG_WIRELESS_PKTRADIO if (_PKRADIOIOCVALID(cmd)) { return sizeof(struct pktradio_ifreq_s); } # endif # ifdef CONFIG_WIRELESS_BLUETOOTH if (_BLUETOOTHIOCVALID(cmd)) { return sizeof(struct btreq_s); } # endif # ifdef CONFIG_NETDEV_MODEM_LTE_IOCTL if (_LTEIOCVALID(cmd)) { switch (cmd) { case SIOCLTECMD: return sizeof(struct lte_ioctl_data_s); default: return sizeof(struct lte_smsreq_s); } } # endif #endif return -ENOTTY; } } /**************************************************************************** * Name: psock_ioctl and psock_vioctl * * Description: * Perform network device specific operations. * * Input Parameters: * psock A pointer to a NuttX-specific, internal socket structure * cmd The ioctl command * arg The argument of the ioctl cmd * * Returned Value: * A non-negative value is returned on success; a negated errno value is * returned on any failure to indicate the nature of the failure: * * EBADF * 'psock' is not a valid, connected socket structure. * EFAULT * 'arg' references an inaccessible memory area. * ENOTTY * 'cmd' not valid. * EINVAL * 'arg' is not valid. * ENOTTY * 'sockfd' is not associated with a network device. * ENOTTY * The specified request does not apply to the kind of object that the * descriptor 'sockfd' references. * ****************************************************************************/ int psock_vioctl(FAR struct socket *psock, int cmd, va_list ap) { unsigned long arg; int ret; /* Verify that the psock corresponds to valid, allocated socket */ if (psock == NULL || psock->s_conn == NULL) { return -EBADF; } arg = va_arg(ap, unsigned long); /* Check for socket specific ioctl command */ ret = netdev_ioctl(psock, cmd, arg); /* Check for a standard network IOCTL command. */ if (ret == -ENOTTY) { ret = netdev_ifr_ioctl(psock, cmd, (FAR struct ifreq *)(uintptr_t)arg); } #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NETDEV_WIRELESS_IOCTL) /* Check for a wireless network command */ if (ret == -ENOTTY) { FAR struct iwreq *wifrreq; wifrreq = (FAR struct iwreq *)((uintptr_t)arg); ret = netdev_wifr_ioctl(psock, cmd, wifrreq); } #endif #if defined(CONFIG_NETDEV_IOCTL) && defined(CONFIG_NET_CELLULAR) /* Check for a cellular network command */ if (ret == -ENOTTY) { ret = netdev_cell_ioctl(psock, cmd, (FAR struct icellreq *)(uintptr_t)arg); } #endif #ifdef HAVE_IEEE802154_IOCTL /* Check for a IEEE802.15.4 network device IOCTL command */ if (ret == -ENOTTY) { ret = netdev_iee802154_ioctl(psock, cmd, arg); } #endif #ifdef HAVE_PKTRADIO_IOCTL /* Check for a non-IEEE802.15.4 packet radio network device IOCTL command */ if (ret == -ENOTTY) { ret = netdev_pktradio_ioctl(psock, cmd, arg); } #endif #ifdef HAVE_BLUETOOTH_IOCTL /* Check for Bluetooth network device IOCTL command */ if (ret == -ENOTTY) { ret = netdev_bluetooth_ioctl(psock, cmd, arg); } #endif #ifdef CONFIG_NET_IGMP /* Check for address filtering commands */ if (ret == -ENOTTY) { ret = netdev_imsf_ioctl(psock, cmd, (FAR struct ip_msfilter *)(uintptr_t)arg); } #endif #ifdef CONFIG_NET_ARP /* Check for ARP table IOCTL commands */ if (ret == -ENOTTY) { ret = netdev_arp_ioctl(psock, cmd, (FAR struct arpreq *)(uintptr_t)arg); } #endif #ifdef CONFIG_NET_ROUTE /* Check for Routing table IOCTL commands */ if (ret == -ENOTTY) { ret = netdev_rt_ioctl(psock, cmd, (FAR struct rtentry *)(uintptr_t)arg); } #endif return ret; } int psock_ioctl(FAR struct socket *psock, int cmd, ...) { va_list ap; int ret; /* Setup to access the variable argument list */ va_start(ap, cmd); /* Let psock_vfcntl() do the real work. The errno is not set on * failures. */ ret = psock_vioctl(psock, cmd, ap); va_end(ap); return ret; } /**************************************************************************** * Name: netdev_ifup / netdev_ifdown * * Description: * Bring the interface up/down * ****************************************************************************/ int netdev_ifup(FAR struct net_driver_s *dev) { int ret = -ENOSYS; /* Make sure that the device supports the d_ifup() method */ if (dev->d_ifup != NULL) { /* Is the interface already up? */ if ((dev->d_flags & IFF_UP) == 0) { /* No, bring the interface up now */ if ((ret = dev->d_ifup(dev)) == OK) { /* Mark the interface as up */ dev->d_flags |= IFF_UP; /* Update the driver status */ netlink_device_notify(dev); } } else { ret = OK; } } return ret; } int netdev_ifdown(FAR struct net_driver_s *dev) { int ret = -ENOSYS; /* Check sure that the device supports the d_ifdown() method */ if (dev->d_ifdown != NULL) { /* Is the interface already down? */ if ((dev->d_flags & IFF_UP) != 0) { /* No, take the interface down now */ if ((ret = dev->d_ifdown(dev)) == OK) { /* Mark the interface as down */ dev->d_flags &= ~(IFF_UP | IFF_RUNNING); /* Update the driver status */ netlink_device_notify(dev); /* Notify clients that the network has been taken down */ devif_dev_event(dev, NETDEV_DOWN); #ifdef CONFIG_NETDOWN_NOTIFIER /* Provide signal notifications to threads that want to be * notified of the network down state via signal. */ netdown_notifier_signal(dev); #endif } } else { ret = OK; } } return ret; }