1 /* 2 * hostapd / VLAN ifconfig helpers 3 * Copyright 2003, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright (c) 2009, Jouni Malinen <j@w1.fi> 6 * 7 * This software may be distributed under the terms of the BSD license. 8 * See README for more details. 9 */ 10 11 #include "utils/includes.h" 12 #include <net/if.h> 13 #include <sys/ioctl.h> 14 15 #include "utils/common.h" 16 #include "vlan_util.h" 17 18 19 int ifconfig_helper(const char *if_name, int up) 20 { 21 int fd; 22 struct ifreq ifr; 23 24 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 25 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 26 "failed: %s", __func__, strerror(errno)); 27 return -1; 28 } 29 30 os_memset(&ifr, 0, sizeof(ifr)); 31 os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ); 32 33 if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) { 34 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCGIFFLAGS) failed " 35 "for interface %s: %s", 36 __func__, if_name, strerror(errno)); 37 close(fd); 38 return -1; 39 } 40 41 if (up) 42 ifr.ifr_flags |= IFF_UP; 43 else 44 ifr.ifr_flags &= ~IFF_UP; 45 46 if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) { 47 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCSIFFLAGS) failed " 48 "for interface %s (up=%d): %s", 49 __func__, if_name, up, strerror(errno)); 50 close(fd); 51 return -1; 52 } 53 54 close(fd); 55 return 0; 56 } 57 58 59 int ifconfig_up(const char *if_name) 60 { 61 wpa_printf(MSG_DEBUG, "VLAN: Set interface %s up", if_name); 62 return ifconfig_helper(if_name, 1); 63 } 64 65 66 int iface_exists(const char *ifname) 67 { 68 return if_nametoindex(ifname); 69 } 70