xref: /external/wpa_supplicant_8/wpa_supplicant/ap.c

/*
 * WPA Supplicant - Basic AP mode support routines
 * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
 * Copyright (c) 2009, Atheros Communications
 *
 * 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 "utils/eloop.h"
#include "utils/uuid.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "crypto/dh_group5.h"
#include "ap/hostapd.h"
#include "ap/ap_config.h"
#include "ap/ap_drv_ops.h"
#ifdef NEED_AP_MLME
#include "ap/ieee802_11.h"
#endif /* NEED_AP_MLME */
#include "ap/beacon.h"
#include "ap/ieee802_1x.h"
#include "ap/wps_hostapd.h"
#include "ap/ctrl_iface_ap.h"
#include "wps/wps.h"
#include "common/ieee802_11_defs.h"
#include "config_ssid.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "p2p_supplicant.h"
#include "ap.h"
#include "ap/sta_info.h"
#include "notify.h"


#ifdef CONFIG_WPS
static void wpas_wps_ap_pin_timeout(void *eloop_data, void *user_ctx);
#endif /* CONFIG_WPS */


#ifdef CONFIG_IEEE80211N
static void wpas_conf_ap_vht(struct wpa_supplicant *wpa_s,
			     struct hostapd_config *conf,
			     struct hostapd_hw_modes *mode)
{
#ifdef CONFIG_P2P
	u8 center_chan = 0;
	u8 channel = conf->channel;

	if (!conf->secondary_channel)
		goto no_vht;

	center_chan = wpas_p2p_get_vht80_center(wpa_s, mode, channel);
	if (!center_chan)
		goto no_vht;

	/* Use 80 MHz channel */
	conf->vht_oper_chwidth = 1;
	conf->vht_oper_centr_freq_seg0_idx = center_chan;
	return;

no_vht:
	conf->vht_oper_centr_freq_seg0_idx =
		channel + conf->secondary_channel * 2;
#else /* CONFIG_P2P */
	conf->vht_oper_centr_freq_seg0_idx =
		conf->channel + conf->secondary_channel * 2;
#endif /* CONFIG_P2P */
}
#endif /* CONFIG_IEEE80211N */


static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
				  struct wpa_ssid *ssid,
				  struct hostapd_config *conf)
{
	struct hostapd_bss_config *bss = conf->bss[0];

	conf->driver = wpa_s->driver;

	os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));

	conf->hw_mode = ieee80211_freq_to_chan(ssid->frequency,
					       &conf->channel);
	if (conf->hw_mode == NUM_HOSTAPD_MODES) {
		wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
			   ssid->frequency);
		return -1;
	}

	/* TODO: enable HT40 if driver supports it;
	 * drop to 11b if driver does not support 11g */

#ifdef CONFIG_IEEE80211N
	/*
	 * Enable HT20 if the driver supports it, by setting conf->ieee80211n
	 * and a mask of allowed capabilities within conf->ht_capab.
	 * Using default config settings for: conf->ht_op_mode_fixed,
	 * conf->secondary_channel, conf->require_ht
	 */
	if (wpa_s->hw.modes) {
		struct hostapd_hw_modes *mode = NULL;
		int i, no_ht = 0;
		for (i = 0; i < wpa_s->hw.num_modes; i++) {
			if (wpa_s->hw.modes[i].mode == conf->hw_mode) {
				mode = &wpa_s->hw.modes[i];
				break;
			}
		}

#ifdef CONFIG_HT_OVERRIDES
		if (ssid->disable_ht) {
			conf->ieee80211n = 0;
			conf->ht_capab = 0;
			no_ht = 1;
		}
#endif /* CONFIG_HT_OVERRIDES */

		if (!no_ht && mode && mode->ht_capab) {
			conf->ieee80211n = 1;
#ifdef CONFIG_P2P
			if (conf->hw_mode == HOSTAPD_MODE_IEEE80211A &&
			    (mode->ht_capab &
			     HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
			    ssid->ht40)
				conf->secondary_channel =
					wpas_p2p_get_ht40_mode(wpa_s, mode,
							       conf->channel);
			if (conf->secondary_channel)
				conf->ht_capab |=
					HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
#endif /* CONFIG_P2P */

			/*
			 * white-list capabilities that won't cause issues
			 * to connecting stations, while leaving the current
			 * capabilities intact (currently disabled SMPS).
			 */
			conf->ht_capab |= mode->ht_capab &
				(HT_CAP_INFO_GREEN_FIELD |
				 HT_CAP_INFO_SHORT_GI20MHZ |
				 HT_CAP_INFO_SHORT_GI40MHZ |
				 HT_CAP_INFO_RX_STBC_MASK |
				 HT_CAP_INFO_MAX_AMSDU_SIZE);

			if (mode->vht_capab && ssid->vht) {
				conf->ieee80211ac = 1;
				wpas_conf_ap_vht(wpa_s, conf, mode);
			}
		}
	}
#endif /* CONFIG_IEEE80211N */

#ifdef CONFIG_P2P
	if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G &&
	    (ssid->mode == WPAS_MODE_P2P_GO ||
	     ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION)) {
		/* Remove 802.11b rates from supported and basic rate sets */
		int *list = os_malloc(4 * sizeof(int));
		if (list) {
			list[0] = 60;
			list[1] = 120;
			list[2] = 240;
			list[3] = -1;
		}
		conf->basic_rates = list;

		list = os_malloc(9 * sizeof(int));
		if (list) {
			list[0] = 60;
			list[1] = 90;
			list[2] = 120;
			list[3] = 180;
			list[4] = 240;
			list[5] = 360;
			list[6] = 480;
			list[7] = 540;
			list[8] = -1;
		}
		conf->supported_rates = list;
	}

	bss->isolate = !wpa_s->conf->p2p_intra_bss;
	bss->force_per_enrollee_psk = wpa_s->global->p2p_per_sta_psk;

	if (ssid->p2p_group) {
		os_memcpy(bss->ip_addr_go, wpa_s->parent->conf->ip_addr_go, 4);
		os_memcpy(bss->ip_addr_mask, wpa_s->parent->conf->ip_addr_mask,
			  4);
		os_memcpy(bss->ip_addr_start,
			  wpa_s->parent->conf->ip_addr_start, 4);
		os_memcpy(bss->ip_addr_end, wpa_s->parent->conf->ip_addr_end,
			  4);
	}
#endif /* CONFIG_P2P */

	if (ssid->ssid_len == 0) {
		wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
		return -1;
	}
	os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
	bss->ssid.ssid_len = ssid->ssid_len;
	bss->ssid.ssid_set = 1;

	bss->ignore_broadcast_ssid = ssid->ignore_broadcast_ssid;

	if (ssid->auth_alg)
		bss->auth_algs = ssid->auth_alg;

	if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
		bss->wpa = ssid->proto;
	bss->wpa_key_mgmt = ssid->key_mgmt;
	bss->wpa_pairwise = ssid->pairwise_cipher;
	if (ssid->psk_set) {
		os_free(bss->ssid.wpa_psk);
		bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
		if (bss->ssid.wpa_psk == NULL)
			return -1;
		os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
		bss->ssid.wpa_psk->group = 1;
	} else if (ssid->passphrase) {
		bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
	} else if (ssid->wep_key_len[0] || ssid->wep_key_len[1] ||
		   ssid->wep_key_len[2] || ssid->wep_key_len[3]) {
		struct hostapd_wep_keys *wep = &bss->ssid.wep;
		int i;
		for (i = 0; i < NUM_WEP_KEYS; i++) {
			if (ssid->wep_key_len[i] == 0)
				continue;
			wep->key[i] = os_malloc(ssid->wep_key_len[i]);
			if (wep->key[i] == NULL)
				return -1;
			os_memcpy(wep->key[i], ssid->wep_key[i],
				  ssid->wep_key_len[i]);
			wep->len[i] = ssid->wep_key_len[i];
		}
		wep->idx = ssid->wep_tx_keyidx;
		wep->keys_set = 1;
	}

	if (ssid->ap_max_inactivity)
		bss->ap_max_inactivity = ssid->ap_max_inactivity;

	if (ssid->dtim_period)
		bss->dtim_period = ssid->dtim_period;
	else if (wpa_s->conf->dtim_period)
		bss->dtim_period = wpa_s->conf->dtim_period;

	if (ssid->beacon_int)
		conf->beacon_int = ssid->beacon_int;
	else if (wpa_s->conf->beacon_int)
		conf->beacon_int = wpa_s->conf->beacon_int;

	if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
		bss->rsn_pairwise = bss->wpa_pairwise;
	bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
						    bss->rsn_pairwise);

	if (bss->wpa && bss->ieee802_1x)
		bss->ssid.security_policy = SECURITY_WPA;
	else if (bss->wpa)
		bss->ssid.security_policy = SECURITY_WPA_PSK;
	else if (bss->ieee802_1x) {
		int cipher = WPA_CIPHER_NONE;
		bss->ssid.security_policy = SECURITY_IEEE_802_1X;
		bss->ssid.wep.default_len = bss->default_wep_key_len;
		if (bss->default_wep_key_len)
			cipher = bss->default_wep_key_len >= 13 ?
				WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
		bss->wpa_group = cipher;
		bss->wpa_pairwise = cipher;
		bss->rsn_pairwise = cipher;
	} else if (bss->ssid.wep.keys_set) {
		int cipher = WPA_CIPHER_WEP40;
		if (bss->ssid.wep.len[0] >= 13)
			cipher = WPA_CIPHER_WEP104;
		bss->ssid.security_policy = SECURITY_STATIC_WEP;
		bss->wpa_group = cipher;
		bss->wpa_pairwise = cipher;
		bss->rsn_pairwise = cipher;
	} else {
		bss->ssid.security_policy = SECURITY_PLAINTEXT;
		bss->wpa_group = WPA_CIPHER_NONE;
		bss->wpa_pairwise = WPA_CIPHER_NONE;
		bss->rsn_pairwise = WPA_CIPHER_NONE;
	}

	if (bss->wpa_group_rekey < 86400 && (bss->wpa & 2) &&
	    (bss->wpa_group == WPA_CIPHER_CCMP ||
	     bss->wpa_group == WPA_CIPHER_GCMP ||
	     bss->wpa_group == WPA_CIPHER_CCMP_256 ||
	     bss->wpa_group == WPA_CIPHER_GCMP_256)) {
		/*
		 * Strong ciphers do not need frequent rekeying, so increase
		 * the default GTK rekeying period to 24 hours.
		 */
		bss->wpa_group_rekey = 86400;
	}

#ifdef CONFIG_IEEE80211W
	if (ssid->ieee80211w != MGMT_FRAME_PROTECTION_DEFAULT)
		bss->ieee80211w = ssid->ieee80211w;
#endif /* CONFIG_IEEE80211W */

#ifdef CONFIG_WPS
	/*
	 * Enable WPS by default for open and WPA/WPA2-Personal network, but
	 * require user interaction to actually use it. Only the internal
	 * Registrar is supported.
	 */
	if (bss->ssid.security_policy != SECURITY_WPA_PSK &&
	    bss->ssid.security_policy != SECURITY_PLAINTEXT)
		goto no_wps;
	if (bss->ssid.security_policy == SECURITY_WPA_PSK &&
	    (!(bss->rsn_pairwise & WPA_CIPHER_CCMP) || !(bss->wpa & 2)))
		goto no_wps; /* WPS2 does not allow WPA/TKIP-only
			      * configuration */
	bss->eap_server = 1;

	if (!ssid->ignore_broadcast_ssid)
		bss->wps_state = 2;

	bss->ap_setup_locked = 2;
	if (wpa_s->conf->config_methods)
		bss->config_methods = os_strdup(wpa_s->conf->config_methods);
	os_memcpy(bss->device_type, wpa_s->conf->device_type,
		  WPS_DEV_TYPE_LEN);
	if (wpa_s->conf->device_name) {
		bss->device_name = os_strdup(wpa_s->conf->device_name);
		bss->friendly_name = os_strdup(wpa_s->conf->device_name);
	}
	if (wpa_s->conf->manufacturer)
		bss->manufacturer = os_strdup(wpa_s->conf->manufacturer);
	if (wpa_s->conf->model_name)
		bss->model_name = os_strdup(wpa_s->conf->model_name);
	if (wpa_s->conf->model_number)
		bss->model_number = os_strdup(wpa_s->conf->model_number);
	if (wpa_s->conf->serial_number)
		bss->serial_number = os_strdup(wpa_s->conf->serial_number);
	if (is_nil_uuid(wpa_s->conf->uuid))
		os_memcpy(bss->uuid, wpa_s->wps->uuid, WPS_UUID_LEN);
	else
		os_memcpy(bss->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
	os_memcpy(bss->os_version, wpa_s->conf->os_version, 4);
	bss->pbc_in_m1 = wpa_s->conf->pbc_in_m1;
no_wps:
#endif /* CONFIG_WPS */

	if (wpa_s->max_stations &&
	    wpa_s->max_stations < wpa_s->conf->max_num_sta)
		bss->max_num_sta = wpa_s->max_stations;
	else
		bss->max_num_sta = wpa_s->conf->max_num_sta;

	bss->disassoc_low_ack = wpa_s->conf->disassoc_low_ack;

	if (wpa_s->conf->ap_vendor_elements) {