| /*! \file macaddr.c |
| * MAC address utility routines. */ |
| /* |
| * (C) 2013-2014 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2014 by Holger Hans Peter Freyther |
| * |
| * All Rights Reserved |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| /*! \addtogroup utils |
| * @{ |
| * \file macaddr.c */ |
| |
| #include "config.h" |
| |
| #include <stdint.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| |
| /*! Parse a MAC address from human-readable notation |
| * This function parses an ethernet MAC address in the commonly-used |
| * hex/colon notation (00:00:00:00:00:00) and generates the binary |
| * representation from it. |
| * \param[out] out pointer to caller-allocated buffer of 6 bytes |
| * \param[in] in pointer to input data as string with hex/colon notation |
| */ |
| int osmo_macaddr_parse(uint8_t *out, const char *in) |
| { |
| /* 00:00:00:00:00:00 */ |
| char tmp[18]; |
| char *tok; |
| unsigned int i = 0; |
| |
| if (strlen(in) < 17) |
| return -1; |
| |
| strncpy(tmp, in, sizeof(tmp)-1); |
| tmp[sizeof(tmp)-1] = '\0'; |
| |
| for (tok = strtok(tmp, ":"); tok && (i < 6); tok = strtok(NULL, ":")) { |
| unsigned long ul = strtoul(tok, NULL, 16); |
| out[i++] = ul & 0xff; |
| } |
| |
| return 0; |
| } |
| |
| #if defined(__FreeBSD__) || defined(__APPLE__) |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <ifaddrs.h> |
| #include <net/if_dl.h> |
| #include <net/if_types.h> |
| |
| /*! Obtain the MAC address of a given network device |
| * \param[out] mac_out pointer to caller-allocated buffer of 6 bytes |
| * \param[in] dev_name string name of the network device |
| * \returns 0 in case of success; negative otherwise |
| */ |
| int osmo_get_macaddr(uint8_t *mac_out, const char *dev_name) |
| { |
| struct ifaddrs *ifa, *ifaddr; |
| int rc = -ENODEV; |
| |
| if (getifaddrs(&ifaddr) != 0) |
| return -errno; |
| |
| for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
| struct sockaddr_dl *sdl; |
| |
| sdl = (struct sockaddr_dl *) ifa->ifa_addr; |
| if (!sdl) |
| continue; |
| if (sdl->sdl_family != AF_LINK) |
| continue; |
| if (sdl->sdl_type != IFT_ETHER) |
| continue; |
| if (strcmp(ifa->ifa_name, dev_name) != 0) |
| continue; |
| |
| memcpy(mac_out, LLADDR(sdl), 6); |
| rc = 0; |
| break; |
| } |
| |
| freeifaddrs(ifaddr); |
| return rc; |
| } |
| |
| #else |
| |
| #if (!EMBEDDED) |
| |
| #include <sys/ioctl.h> |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <netinet/ip.h> |
| #include <errno.h> |
| |
| /*! Obtain the MAC address of a given network device |
| * \param[out] mac_out pointer to caller-allocated buffer of 6 bytes |
| * \param[in] dev_name string name of the network device |
| * \returns 0 in case of success; negative otherwise |
| */ |
| int osmo_get_macaddr(uint8_t *mac_out, const char *dev_name) |
| { |
| int fd, rc, dev_len; |
| struct ifreq ifr; |
| |
| dev_len = strlen(dev_name); |
| if (dev_len >= sizeof(ifr.ifr_name)) |
| return -EINVAL; |
| |
| fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); |
| if (fd < 0) |
| return fd; |
| |
| memset(&ifr, 0, sizeof(ifr)); |
| memcpy(&ifr.ifr_name, dev_name, dev_len + 1); |
| rc = ioctl(fd, SIOCGIFHWADDR, &ifr); |
| close(fd); |
| |
| if (rc < 0) |
| return rc; |
| |
| memcpy(mac_out, ifr.ifr_hwaddr.sa_data, 6); |
| |
| return 0; |
| } |
| #endif /* !EMBEDDED */ |
| |
| #endif |
| |
| /*! @} */ |