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/*
* 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;
#ifdef CONFIG_WEP
int 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;
}
#endif /* CONFIG_WEP */
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;
}
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