| /** |
| * @file |
| * Interface Identification APIs from: |
| * RFC 3493: Basic Socket Interface Extensions for IPv6 |
| * Section 4: Interface Identification |
| * |
| * @defgroup if_api Interface Identification API |
| * @ingroup socket |
| */ |
| |
| /* |
| * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| * OF SUCH DAMAGE. |
| * |
| * This file is part of the lwIP TCP/IP stack. |
| * |
| * Author: Joel Cunningham <joel.cunningham@me.com> |
| * |
| */ |
| #include "lwip/opt.h" |
| |
| #if LWIP_SOCKET |
| |
| #include "lwip/errno.h" |
| #include "lwip/if_api.h" |
| #include "lwip/netifapi.h" |
| #include "lwip/priv/sockets_priv.h" |
| |
| /** |
| * @ingroup if_api |
| * Maps an interface index to its corresponding name. |
| * @param ifindex interface index |
| * @param ifname shall point to a buffer of at least {IF_NAMESIZE} bytes |
| * @return If ifindex is an interface index, then the function shall return the |
| * value supplied in ifname, which points to a buffer now containing the interface name. |
| * Otherwise, the function shall return a NULL pointer. |
| */ |
| char * |
| lwip_if_indextoname(unsigned int ifindex, char *ifname) |
| { |
| #if LWIP_NETIF_API |
| if (ifindex <= 0xff) { |
| err_t err = netifapi_netif_index_to_name((u8_t)ifindex, ifname); |
| if (!err && ifname[0] != '\0') { |
| return ifname; |
| } |
| } |
| #else /* LWIP_NETIF_API */ |
| LWIP_UNUSED_ARG(ifindex); |
| LWIP_UNUSED_ARG(ifname); |
| #endif /* LWIP_NETIF_API */ |
| set_errno(ENXIO); |
| return NULL; |
| } |
| |
| /** |
| * @ingroup if_api |
| * Returs the interface index corresponding to name ifname. |
| * @param ifname Interface name |
| * @return The corresponding index if ifname is the name of an interface; |
| * otherwise, zero. |
| */ |
| unsigned int |
| lwip_if_nametoindex(const char *ifname) |
| { |
| #if LWIP_NETIF_API |
| err_t err; |
| u8_t idx; |
| |
| err = netifapi_netif_name_to_index(ifname, &idx); |
| if (!err) { |
| return idx; |
| } |
| #else /* LWIP_NETIF_API */ |
| LWIP_UNUSED_ARG(ifname); |
| #endif /* LWIP_NETIF_API */ |
| return 0; /* invalid index */ |
| } |
| |
| #endif /* LWIP_SOCKET */ |