sta_info.c

最新的Host AP 新添加了许多pcmcia 的驱动

	case STA_DEAUTH:
	case STA_REMOVE:
		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_INFO, "deauthenticated due to "
			       "inactivity");
		if (!sta->acct_terminate_cause)
			sta->acct_terminate_cause =
				RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
		mlme_deauthenticate_indication(
			hapd, sta,
			WLAN_REASON_PREV_AUTH_NOT_VALID);
		ap_free_sta(hapd, sta);
		break;
	}
}


static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
{
	struct hostapd_data *hapd = eloop_ctx;
	struct sta_info *sta = timeout_ctx;
	u8 addr[ETH_ALEN];

	if (!(sta->flags & WLAN_STA_AUTH))
		return;

	mlme_deauthenticate_indication(hapd, sta,
				       WLAN_REASON_PREV_AUTH_NOT_VALID);
	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "deauthenticated due to "
		       "session timeout");
	sta->acct_terminate_cause =
		RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
	os_memcpy(addr, sta->addr, ETH_ALEN);
	ap_free_sta(hapd, sta);
	hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
}


void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
			    u32 session_timeout)
{
	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
		       "seconds", session_timeout);
	eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
	eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
			       hapd, sta);
}


void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
{
	eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
}


struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
{
	struct sta_info *sta;

	sta = ap_get_sta(hapd, addr);
	if (sta)
		return sta;

	wpa_printf(MSG_DEBUG, "  New STA");
	if (hapd->num_sta >= hapd->conf->max_num_sta) {
		/* FIX: might try to remove some old STAs first? */
		wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
			   hapd->num_sta, hapd->conf->max_num_sta);
		return NULL;
	}

	sta = os_zalloc(sizeof(struct sta_info));
	if (sta == NULL) {
		wpa_printf(MSG_ERROR, "malloc failed");
		return NULL;
	}
	sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;

	/* initialize STA info data */
	eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
			       ap_handle_timer, hapd, sta);
	os_memcpy(sta->addr, addr, ETH_ALEN);
	sta->next = hapd->sta_list;
	hapd->sta_list = sta;
	hapd->num_sta++;
	ap_sta_hash_add(hapd, sta);
	sta->ssid = &hapd->conf->ssid;

	return sta;
}


static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
{
	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);

	wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
		   MAC2STR(sta->addr));
	if (hostapd_sta_remove(hapd, sta->addr) &&
	    sta->flags & WLAN_STA_ASSOC) {
		wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
			   " from kernel driver.", MAC2STR(sta->addr));
		return -1;
	}
	return 0;
}


static int ap_sta_in_other_bss(struct hostapd_data *hapd,
			       struct sta_info *sta, u32 flags)
{
	struct hostapd_iface *iface = hapd->iface;
	size_t i;

	for (i = 0; i < iface->num_bss; i++) {
		struct hostapd_data *bss = iface->bss[i];
		struct sta_info *sta2;
		/* bss should always be set during operation, but it may be
		 * NULL during reconfiguration. Assume the STA is not
		 * associated to another BSS in that case to avoid NULL pointer
		 * dereferences. */
		if (bss == hapd || bss == NULL)
			continue;
		sta2 = ap_get_sta(bss, sta->addr);
		if (sta2 && ((sta2->flags & flags) == flags))
			return 1;
	}

	return 0;
}


void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
			 u16 reason)
{
	wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
		   hapd->conf->iface, MAC2STR(sta->addr));
	sta->flags &= ~WLAN_STA_ASSOC;
	if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
		ap_sta_remove(hapd, sta);
	sta->timeout_next = STA_DEAUTH;
	eloop_cancel_timeout(ap_handle_timer, hapd, sta);
	eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
			       ap_handle_timer, hapd, sta);
	accounting_sta_stop(hapd, sta);
	ieee802_1x_free_station(sta);

	mlme_disassociate_indication(hapd, sta, reason);
}


void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
			   u16 reason)
{
	wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
		   hapd->conf->iface, MAC2STR(sta->addr));
	sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
	if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
		ap_sta_remove(hapd, sta);
	sta->timeout_next = STA_REMOVE;
	eloop_cancel_timeout(ap_handle_timer, hapd, sta);
	eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
			       ap_handle_timer, hapd, sta);
	accounting_sta_stop(hapd, sta);
	ieee802_1x_free_station(sta);

	mlme_deauthenticate_indication(hapd, sta, reason);
}


int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
		     int old_vlanid)
{
	const char *iface;
	struct hostapd_vlan *vlan = NULL;

	/*
	 * Do not proceed furthur if the vlan id remains same. We do not want
	 * duplicate dynamic vlan entries.
	 */
	if (sta->vlan_id == old_vlanid)
		return 0;

	/*
	 * During 1x reauth, if the vlan id changes, then remove the old id and
	 * proceed furthur to add the new one.
	 */
	if (old_vlanid > 0)
		vlan_remove_dynamic(hapd, old_vlanid);

	iface = hapd->conf->iface;
	if (sta->ssid->vlan[0])
		iface = sta->ssid->vlan;

	if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
		sta->vlan_id = 0;
	else if (sta->vlan_id > 0) {
		vlan = hapd->conf->vlan;
		while (vlan) {
			if (vlan->vlan_id == sta->vlan_id ||
			    vlan->vlan_id == VLAN_ID_WILDCARD) {
				iface = vlan->ifname;
				break;
			}
			vlan = vlan->next;
		}
	}

	if (sta->vlan_id > 0 && vlan == NULL) {
		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
			       "binding station to (vlan_id=%d)",
			       sta->vlan_id);
		return -1;
	} else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
		vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
		if (vlan == NULL) {
			hostapd_logger(hapd, sta->addr,
				       HOSTAPD_MODULE_IEEE80211,
				       HOSTAPD_LEVEL_DEBUG, "could not add "
				       "dynamic VLAN interface for vlan_id=%d",
				       sta->vlan_id);
			return -1;
		}

		iface = vlan->ifname;
		if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
			hostapd_logger(hapd, sta->addr,
				       HOSTAPD_MODULE_IEEE80211,
				       HOSTAPD_LEVEL_DEBUG, "could not "
				       "configure encryption for dynamic VLAN "
				       "interface for vlan_id=%d",
				       sta->vlan_id);
		}

		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
			       "interface '%s'", iface);
	} else if (vlan && vlan->vlan_id == sta->vlan_id) {
		if (sta->vlan_id > 0) {
			vlan->dynamic_vlan++;
			hostapd_logger(hapd, sta->addr,
				       HOSTAPD_MODULE_IEEE80211,
				       HOSTAPD_LEVEL_DEBUG, "updated existing "
				       "dynamic VLAN interface '%s'", iface);
		}

		/*
		 * Update encryption configuration for statically generated
		 * VLAN interface. This is only used for static WEP
		 * configuration for the case where hostapd did not yet know
		 * which keys are to be used when the interface was added.
		 */
		if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
			hostapd_logger(hapd, sta->addr,
				       HOSTAPD_MODULE_IEEE80211,
				       HOSTAPD_LEVEL_DEBUG, "could not "
				       "configure encryption for VLAN "
				       "interface for vlan_id=%d",
				       sta->vlan_id);
		}
	}

	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_DEBUG, "binding station to interface "
		       "'%s'", iface);

	if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
		wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");

	return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
}


#ifdef CONFIG_IEEE80211W

int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
{
	u32 tu;
	struct os_time now, passed;
	os_get_time(&now);
	os_time_sub(&now, &sta->sa_query_start, &passed);
	tu = (passed.sec * 1000000 + passed.usec) / 1024;
	if (hapd->conf->assoc_sa_query_max_timeout < tu) {
		hostapd_logger(hapd, sta->addr,
			       HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_DEBUG,
			       "association SA Query timed out");
		sta->sa_query_timed_out = 1;
		os_free(sta->sa_query_trans_id);
		sta->sa_query_trans_id = NULL;
		sta->sa_query_count = 0;
		eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
		return 1;
	}

	return 0;
}


static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
{
	struct hostapd_data *hapd = eloop_ctx;
	struct sta_info *sta = timeout_ctx;
	unsigned int timeout, sec, usec;
	u8 *trans_id, *nbuf;

	if (sta->sa_query_count > 0 &&
	    ap_check_sa_query_timeout(hapd, sta))
		return;

	nbuf = os_realloc(sta->sa_query_trans_id,
			  (sta->sa_query_count + 1) * WLAN_SA_QUERY_TR_ID_LEN);
	if (nbuf == NULL)
		return;
	if (sta->sa_query_count == 0) {
		/* Starting a new SA Query procedure */
		os_get_time(&sta->sa_query_start);
	}
	trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
	sta->sa_query_trans_id = nbuf;
	sta->sa_query_count++;

	os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);

	timeout = hapd->conf->assoc_sa_query_retry_timeout;
	sec = ((timeout / 1000) * 1024) / 1000;
	usec = (timeout % 1000) * 1024;
	eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);

	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_DEBUG,
		       "association SA Query attempt %d", sta->sa_query_count);

	ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
}


void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
{
	ap_sa_query_timer(hapd, sta);
}


void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
{
	eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
	os_free(sta->sa_query_trans_id);
	sta->sa_query_trans_id = NULL;
	sta->sa_query_count = 0;
}

#endif /* CONFIG_IEEE80211W */