/* * hostapd / VLAN initialization * Copyright 2003, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright (c) 2009, Jouni Malinen <j@w1.fi> * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #include "utils/common.h" #include "hostapd.h" #include "ap_config.h" #include "ap_drv_ops.h" #include "wpa_auth.h" #include "vlan_init.h" #include "vlan_util.h" static int vlan_if_add(struct hostapd_data *hapd, struct hostapd_vlan *vlan, int existsok) { int ret, i; for (i = 0; i < NUM_WEP_KEYS; i++) { if (!hapd->conf->ssid.wep.key[i]) continue; wpa_printf(MSG_ERROR, "VLAN: Refusing to set up VLAN iface %s with WEP", vlan->ifname); return -1; } if (!iface_exists(vlan->ifname)) ret = hostapd_vlan_if_add(hapd, vlan->ifname); else if (!existsok) return -1; else ret = 0; if (ret) return ret; ifconfig_up(vlan->ifname); /* else wpa group will fail fatal */ if (hapd->wpa_auth) ret = wpa_auth_ensure_group(hapd->wpa_auth, vlan->vlan_id); if (ret == 0) return ret; wpa_printf(MSG_ERROR, "WPA initialization for VLAN %d failed (%d)", vlan->vlan_id, ret); if (wpa_auth_release_group(hapd->wpa_auth, vlan->vlan_id)) wpa_printf(MSG_ERROR, "WPA deinit of %s failed", vlan->ifname); /* group state machine setup failed */ if (hostapd_vlan_if_remove(hapd, vlan->ifname)) wpa_printf(MSG_ERROR, "Removal of %s failed", vlan->ifname); return ret; } int vlan_if_remove(struct hostapd_data *hapd, struct hostapd_vlan *vlan) { int ret; ret = wpa_auth_release_group(hapd->wpa_auth, vlan->vlan_id); if (ret) wpa_printf(MSG_ERROR, "WPA deinitialization for VLAN %d failed (%d)", vlan->vlan_id, ret); return hostapd_vlan_if_remove(hapd, vlan->ifname); } static int vlan_dynamic_add(struct hostapd_data *hapd, struct hostapd_vlan *vlan) { while (vlan) { if (vlan->vlan_id != VLAN_ID_WILDCARD) { if (vlan_if_add(hapd, vlan, 1)) { wpa_printf(MSG_ERROR, "VLAN: Could not add VLAN %s: %s", vlan->ifname, strerror(errno)); return -1; } #ifdef CONFIG_FULL_DYNAMIC_VLAN vlan_newlink(vlan->ifname, hapd); #endif /* CONFIG_FULL_DYNAMIC_VLAN */ } vlan = vlan->next; } return 0; } static void vlan_dynamic_remove(struct hostapd_data *hapd, struct hostapd_vlan *vlan) { struct hostapd_vlan *next; while (vlan) { next = vlan->next; #ifdef CONFIG_FULL_DYNAMIC_VLAN /* vlan_dellink() takes care of cleanup and interface removal */ if (vlan->vlan_id != VLAN_ID_WILDCARD) vlan_dellink(vlan->ifname, hapd); #else /* CONFIG_FULL_DYNAMIC_VLAN */ if (vlan->vlan_id != VLAN_ID_WILDCARD && vlan_if_remove(hapd, vlan)) { wpa_printf(MSG_ERROR, "VLAN: Could not remove VLAN " "iface: %s: %s", vlan->ifname, strerror(errno)); } #endif /* CONFIG_FULL_DYNAMIC_VLAN */ vlan = next; } } int vlan_init(struct hostapd_data *hapd) { #ifdef CONFIG_FULL_DYNAMIC_VLAN hapd->full_dynamic_vlan = full_dynamic_vlan_init(hapd); #endif /* CONFIG_FULL_DYNAMIC_VLAN */ if ((hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED || hapd->conf->ssid.per_sta_vif) && !hapd->conf->vlan) { /* dynamic vlans enabled but no (or empty) vlan_file given */ struct hostapd_vlan *vlan; int ret; vlan = os_zalloc(sizeof(*vlan)); if (vlan == NULL) { wpa_printf(MSG_ERROR, "Out of memory while assigning " "VLAN interfaces"); return -1; } vlan->vlan_id = VLAN_ID_WILDCARD; ret = os_snprintf(vlan->ifname, sizeof(vlan->ifname), "%s.#", hapd->conf->iface); if (ret >= (int) sizeof(vlan->ifname)) { wpa_printf(MSG_WARNING, "VLAN: Interface name was truncated to %s", vlan->ifname); } else if (ret < 0) { os_free(vlan); return ret; } vlan->next = hapd->conf->vlan; hapd->conf->vlan = vlan; } if (vlan_dynamic_add(hapd, hapd->conf->vlan)) return -1; return 0; } void vlan_deinit(struct hostapd_data *hapd) { vlan_dynamic_remove(hapd, hapd->conf->vlan); #ifdef CONFIG_FULL_DYNAMIC_VLAN full_dynamic_vlan_deinit(hapd->full_dynamic_vlan); hapd->full_dynamic_vlan = NULL; #endif /* CONFIG_FULL_DYNAMIC_VLAN */ } struct hostapd_vlan * vlan_add_dynamic(struct hostapd_data *hapd, struct hostapd_vlan *vlan, int vlan_id, struct vlan_description *vlan_desc) { struct hostapd_vlan *n; char ifname[IFNAMSIZ + 1], *pos; int ret; if (vlan == NULL || vlan->vlan_id != VLAN_ID_WILDCARD) return NULL; wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d ifname=%s)", __func__, vlan_id, vlan->ifname); os_strlcpy(ifname, vlan->ifname, sizeof(ifname)); pos = os_strchr(ifname, '#'); if (pos == NULL) return NULL; *pos++ = '\0'; n = os_zalloc(sizeof(*n)); if (n == NULL) return NULL; n->vlan_id = vlan_id; if (vlan_desc) n->vlan_desc = *vlan_desc; n->dynamic_vlan = 1; ret = os_snprintf(n->ifname, sizeof(n->ifname), "%s%d%s", ifname, vlan_id, pos); if (os_snprintf_error(sizeof(n->ifname), ret)) { os_free(n); return NULL; } os_strlcpy(n->bridge, vlan->bridge, sizeof(n->bridge)); n->next = hapd->conf->vlan; hapd->conf->vlan = n; /* hapd->conf->vlan needs this new VLAN here for WPA setup */ if (vlan_if_add(hapd, n, 0)) { hapd->conf->vlan = n->next; os_free(n); n = NULL; } return n; } int vlan_remove_dynamic(struct hostapd_data *hapd, int vlan_id) { struct hostapd_vlan *vlan; if (vlan_id <= 0) return 1; wpa_printf(MSG_DEBUG, "VLAN: %s(ifname=%s vlan_id=%d)", __func__, hapd->conf->iface, vlan_id); vlan = hapd->conf->vlan; while (vlan) { if (vlan->vlan_id == vlan_id && vlan->dynamic_vlan > 0) { vlan->dynamic_vlan--; break; } vlan = vlan->next; } if (vlan == NULL) return 1; if (vlan->dynamic_vlan == 0) { vlan_if_remove(hapd, vlan); #ifdef CONFIG_FULL_DYNAMIC_VLAN vlan_dellink(vlan->ifname, hapd); #endif /* CONFIG_FULL_DYNAMIC_VLAN */ } return 0; }