P2P: Allow configuring CTWindow when working as GO

Read p2p_go_ctwindow (0-127 TUs) from the config file, and pass it to
the driver on GO start.

Use p2p_go_ctwindow=0 (no CTWindow) by default.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>

src/ap/ap_config.h

@@ -629,6 +629,10 @@ struct hostapd_config {
 	u8 vht_oper_centr_freq_seg0_idx;
 	u8 vht_oper_centr_freq_seg1_idx;
 
+#ifdef CONFIG_P2P
+	u8 p2p_go_ctwindow;
+#endif /* CONFIG_P2P */
+
 #ifdef CONFIG_TESTING_OPTIONS
 	double ignore_probe_probability;
 	double ignore_auth_probability;

src/ap/beacon.c

@@ -1008,6 +1008,9 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 		params->hessid = hapd->conf->hessid;
 	params->access_network_type = hapd->conf->access_network_type;
 	params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
+#ifdef CONFIG_P2P
+	params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
+#endif /* CONFIG_P2P */
 #ifdef CONFIG_HS20
 	params->disable_dgaf = hapd->conf->disable_dgaf;
 	if (hapd->conf->osen) {

src/drivers/driver.h

@@ -1017,6 +1017,11 @@ struct wpa_driver_ap_params {
 	 */
 	int ap_max_inactivity;
 
+	/**
+	 * ctwindow - Client Traffic Window (in TUs)
+	 */
+	u8 p2p_go_ctwindow;
+
 	/**
 	 * smps_mode - SMPS mode
 	 *

wpa_supplicant/ap.c

@@ -265,6 +265,17 @@ static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 	else if (wpa_s->conf->beacon_int)
 		conf->beacon_int = wpa_s->conf->beacon_int;
 
+#ifdef CONFIG_P2P
+	if (wpa_s->conf->p2p_go_ctwindow > conf->beacon_int) {
+		wpa_printf(MSG_INFO,
+			   "CTWindow (%d) is bigger than beacon interval (%d) - avoid configuring it",
+			   wpa_s->conf->p2p_go_ctwindow, conf->beacon_int);
+		conf->p2p_go_ctwindow = 0;
+	} else {
+		conf->p2p_go_ctwindow = wpa_s->conf->p2p_go_ctwindow;
+	}
+#endif /* CONFIG_P2P */
+
 	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,

wpa_supplicant/config.c

@@ -3504,6 +3504,7 @@ struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
 	config->p2p_intra_bss = DEFAULT_P2P_INTRA_BSS;
 	config->p2p_go_max_inactivity = DEFAULT_P2P_GO_MAX_INACTIVITY;
 	config->p2p_optimize_listen_chan = DEFAULT_P2P_OPTIMIZE_LISTEN_CHAN;
+	config->p2p_go_ctwindow = DEFAULT_P2P_GO_CTWINDOW;
 	config->bss_max_count = DEFAULT_BSS_MAX_COUNT;
 	config->bss_expiration_age = DEFAULT_BSS_EXPIRATION_AGE;
 	config->bss_expiration_scan_count = DEFAULT_BSS_EXPIRATION_SCAN_COUNT;
@@ -4136,6 +4137,7 @@ static const struct global_parse_data global_fields[] = {
 	{ INT(p2p_go_ht40), 0 },
 	{ INT(p2p_go_vht), 0 },
 	{ INT(p2p_disabled), 0 },
+	{ INT_RANGE(p2p_go_ctwindow, 0, 127), 0 },
 	{ INT(p2p_no_group_iface), 0 },
 	{ INT_RANGE(p2p_ignore_shared_freq, 0, 1), 0 },
 	{ IPV4(ip_addr_go), 0 },

wpa_supplicant/config.h

@@ -33,6 +33,7 @@
 #define DEFAULT_RAND_ADDR_LIFETIME 60
 #define DEFAULT_KEY_MGMT_OFFLOAD 1
 #define DEFAULT_CERT_IN_CB 1
+#define DEFAULT_P2P_GO_CTWINDOW 0
 
 #include "config_ssid.h"
 #include "wps/wps.h"
@@ -941,6 +942,14 @@ struct wpa_config {
 	 */
 	int p2p_go_vht;
 
+	/**
+	 * p2p_go_ctwindow - CTWindow to use when operating as GO
+	 *
+	 * By default: 0 (no CTWindow). Values 0-127 can be used to indicate
+	 * the length of the CTWindow in TUs.
+	 */
+	int p2p_go_ctwindow;
+
 	/**
 	 * p2p_disabled - Whether P2P operations are disabled for this interface
 	 */

wpa_supplicant/config_file.c

@@ -1115,6 +1115,8 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
 	if (config->p2p_go_vht)
 		fprintf(f, "p2p_go_vht=%u\n", config->p2p_go_vht);
+	if (config->p2p_go_ctwindow != DEFAULT_P2P_GO_CTWINDOW)
+		fprintf(f, "p2p_go_ctwindow=%u\n", config->p2p_go_ctwindow);
 	if (config->p2p_disabled)
 		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
 	if (config->p2p_no_group_iface)

wpa_supplicant/p2p_supplicant.c

@@ -1852,6 +1852,7 @@ static void wpas_p2p_clone_config(struct wpa_supplicant *dst,
 	d->ignore_old_scan_res = s->ignore_old_scan_res;
 	d->beacon_int = s->beacon_int;
 	d->dtim_period = s->dtim_period;
+	d->p2p_go_ctwindow = s->p2p_go_ctwindow;
 	d->disassoc_low_ack = s->disassoc_low_ack;
 	d->disable_scan_offload = s->disable_scan_offload;
 	d->passive_scan = s->passive_scan;