int hostapd_vlan_valid(struct hostapd_vlan *vlan,
struct vlan_description *vlan_desc)
{
struct hostapd_vlan *v = vlan;
int i;
if (!vlan_desc->notempty || vlan_desc->untagged < 0 ||
vlan_desc->untagged > MAX_VLAN_ID)
return 0;
for (i = 0; i < MAX_NUM_TAGGED_VLAN; i++) {
if (vlan_desc->tagged[i] < 0 ||
vlan_desc->tagged[i] > MAX_VLAN_ID)
return 0;
}
if (!vlan_desc->untagged && !vlan_desc->tagged[0])
return 0;
while (v) {
if (!vlan_compare(&v->vlan_desc, vlan_desc) ||
v->vlan_id == VLAN_ID_WILDCARD)
return 1;
v = v->next;
}
return 0;
}
int ap_sta_set_vlan(struct hostapd_data *hapd, struct sta_info *sta,
struct vlan_description *vlan_desc)
{
struct hostapd_vlan *vlan = NULL, *wildcard_vlan = NULL;
int old_vlan_id, vlan_id = 0, ret = 0;
if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_DISABLED)
vlan_desc = NULL;
/* Check if there is something to do */
if (hapd->conf->ssid.per_sta_vif && !sta->vlan_id) {
/* This sta is lacking its own vif */
} else if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_DISABLED &&
!hapd->conf->ssid.per_sta_vif && sta->vlan_id) {
/* sta->vlan_id needs to be reset */
} else if (!vlan_compare(vlan_desc, sta->vlan_desc)) {
return 0; /* nothing to change */
}
/* Now the real VLAN changed or the STA just needs its own vif */
if (hapd->conf->ssid.per_sta_vif) {
/* Assign a new vif, always */
/* find a free vlan_id sufficiently big */
vlan_id = ap_sta_get_free_vlan_id(hapd);
/* Get wildcard VLAN */
for (vlan = hapd->conf->vlan; vlan; vlan = vlan->next) {
if (vlan->vlan_id == VLAN_ID_WILDCARD)
break;
}
if (!vlan) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"per_sta_vif missing wildcard");
vlan_id = 0;
ret = -1;
goto done;
}
} else if (vlan_desc && vlan_desc->notempty) {
for (vlan = hapd->conf->vlan; vlan; vlan = vlan->next) {
if (!vlan_compare(&vlan->vlan_desc, vlan_desc))
break;
if (vlan->vlan_id == VLAN_ID_WILDCARD)
wildcard_vlan = vlan;
}
if (vlan) {
vlan_id = vlan->vlan_id;
} else if (wildcard_vlan) {
vlan = wildcard_vlan;
vlan_id = vlan_desc->untagged;
if (vlan_desc->tagged[0]) {
/* Tagged VLAN configuration */
vlan_id = ap_sta_get_free_vlan_id(hapd);
}
} else {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"missing vlan and wildcard for vlan=%d%s",
vlan_desc->untagged,
vlan_desc->tagged[0] ? "+" : "");
vlan_id = 0;
ret = -1;
goto done;
}
}
if (vlan && vlan->vlan_id == VLAN_ID_WILDCARD) {
vlan = vlan_add_dynamic(hapd, vlan, vlan_id, vlan_desc);
if (vlan == NULL) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"could not add dynamic VLAN interface for vlan=%d%s",
vlan_desc ? vlan_desc->untagged : -1,
(vlan_desc && vlan_desc->tagged[0]) ?
"+" : "");
vlan_id = 0;
ret = -1;
goto done;
}
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"added new dynamic VLAN interface '%s'",
vlan->ifname);
} else if (vlan && vlan->dynamic_vlan > 0) {
vlan->dynamic_vlan++;
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG,
"updated existing dynamic VLAN interface '%s'",
vlan->ifname);
}
done:
old_vlan_id = sta->vlan_id;
sta->vlan_id = vlan_id;
sta->vlan_desc = vlan ? &vlan->vlan_desc : NULL;
if (vlan_id != old_vlan_id && old_vlan_id)
vlan_remove_dynamic(hapd, old_vlan_id);
return ret;
}
