hostapd: Move CSA parameters to hostapd_data

This prepares CSA structure and logic in hostapd for multi-BSS channel
switching.

Signed-hostap: Michal Kazior <michal.kazior@tieto.com>

src/ap/beacon.c

@@ -265,18 +265,18 @@ static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 {
 	u8 chan;
 
-	if (!hapd->iface->cs_freq_params.freq)
+	if (!hapd->cs_freq_params.freq)
 		return eid;
 
-	if (ieee80211_freq_to_chan(hapd->iface->cs_freq_params.freq, &chan) ==
+	if (ieee80211_freq_to_chan(hapd->cs_freq_params.freq, &chan) ==
 	    NUM_HOSTAPD_MODES)
 		return eid;
 
 	*eid++ = WLAN_EID_CHANNEL_SWITCH;
 	*eid++ = 3;
-	*eid++ = hapd->iface->cs_block_tx;
+	*eid++ = hapd->cs_block_tx;
 	*eid++ = chan;
-	*eid++ = hapd->iface->cs_count;
+	*eid++ = hapd->cs_count;
 
 	return eid;
 }
@@ -286,12 +286,12 @@ static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 {
 	u8 sec_ch;
 
-	if (!hapd->iface->cs_freq_params.sec_channel_offset)
+	if (!hapd->cs_freq_params.sec_channel_offset)
 		return eid;
 
-	if (hapd->iface->cs_freq_params.sec_channel_offset == -1)
+	if (hapd->cs_freq_params.sec_channel_offset == -1)
 		sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
-	else if (hapd->iface->cs_freq_params.sec_channel_offset == 1)
+	else if (hapd->cs_freq_params.sec_channel_offset == 1)
 		sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
 	else
 		return eid;
@@ -409,7 +409,7 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 	pos = hostapd_eid_roaming_consortium(hapd, pos);
 
 	pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
-				    &hapd->iface->cs_c_off_proberesp);
+				    &hapd->cs_c_off_proberesp);
 #ifdef CONFIG_IEEE80211AC
 	pos = hostapd_eid_vht_capabilities(hapd, pos);
 	pos = hostapd_eid_vht_operation(hapd, pos);
@@ -824,7 +824,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 	tailpos = hostapd_eid_adv_proto(hapd, tailpos);
 	tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
 	tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
-					&hapd->iface->cs_c_off_beacon);
+					&hapd->cs_c_off_beacon);
 #ifdef CONFIG_IEEE80211AC
 	tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
 	tailpos = hostapd_eid_vht_operation(hapd, tailpos);
@@ -957,7 +957,7 @@ int ieee802_11_set_beacon(struct hostapd_data *hapd)
 	struct wpabuf *beacon, *proberesp, *assocresp;
 	int res, ret = -1;
 
-	if (hapd->iface->csa_in_progress) {
+	if (hapd->csa_in_progress) {
 		wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
 		return -1;
 	}

src/ap/dfs.c

@@ -756,6 +756,16 @@ static int hostapd_dfs_start_channel_switch_cac(struct hostapd_iface *iface)
 }
 
 
+static int hostapd_csa_in_progress(struct hostapd_iface *iface)
+{
+	unsigned int i;
+	for (i = 0; i < iface->num_bss; i++)
+		if (iface->bss[i]->csa_in_progress)
+			return 1;
+	return 0;
+}
+
+
 static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
 {
 	struct hostapd_channel_data *channel;
@@ -769,10 +779,10 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
 
 	wpa_printf(MSG_DEBUG, "%s called (CAC active: %s, CSA active: %s)",
 		   __func__, iface->cac_started ? "yes" : "no",
-		   iface->csa_in_progress ? "yes" : "no");
+		   hostapd_csa_in_progress(iface) ? "yes" : "no");
 
 	/* Check if CSA in progress */
-	if (iface->csa_in_progress)
+	if (hostapd_csa_in_progress(iface))
 		return 0;
 
 	/* Check if active CAC */

src/ap/drv_callbacks.c

@@ -489,9 +489,10 @@ void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
 	hapd->iconf->vht_oper_centr_freq_seg0_idx = seg0_idx;
 	hapd->iconf->vht_oper_centr_freq_seg1_idx = seg1_idx;
 
-	if (hapd->iface->csa_in_progress &&
-	    freq == hapd->iface->cs_freq_params.freq) {
+	if (hapd->csa_in_progress &&
+	    freq == hapd->cs_freq_params.freq) {
 		hostapd_cleanup_cs_params(hapd);
+		ieee802_11_set_beacon(hapd);
 
 		wpa_msg(hapd->msg_ctx, MSG_INFO, AP_CSA_FINISHED "freq=%d",
 			freq);

src/ap/hostapd.c

@@ -2175,13 +2175,12 @@ static void free_beacon_data(struct beacon_data *beacon)
 }
 
 
-static int hostapd_build_beacon_data(struct hostapd_iface *iface,
+static int hostapd_build_beacon_data(struct hostapd_data *hapd,
 				     struct beacon_data *beacon)
 {
 	struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
 	struct wpa_driver_ap_params params;
 	int ret;
-	struct hostapd_data *hapd = iface->bss[0];
 
 	os_memset(beacon, 0, sizeof(*beacon));
 	ret = ieee802_11_build_ap_params(hapd, &params);
@@ -2305,14 +2304,15 @@ static int hostapd_change_config_freq(struct hostapd_data *hapd,
 }
 
 
-static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
+static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
 				     struct csa_settings *settings)
 {
+	struct hostapd_iface *iface = hapd->iface;
 	struct hostapd_freq_params old_freq;
 	int ret;
 
 	os_memset(&old_freq, 0, sizeof(old_freq));
-	if (!iface || !iface->freq || iface->csa_in_progress)
+	if (!iface || !iface->freq || hapd->csa_in_progress)
 		return -1;
 
 	ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
@@ -2321,7 +2321,7 @@ static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
 	if (ret)
 		return ret;
 
-	ret = hostapd_build_beacon_data(iface, &settings->beacon_after);
+	ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
 
 	/* change back the configuration */
 	hostapd_change_config_freq(iface->bss[0], iface->conf,
@@ -2331,18 +2331,18 @@ static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
 		return ret;
 
 	/* set channel switch parameters for csa ie */
-	iface->cs_freq_params = settings->freq_params;
-	iface->cs_count = settings->cs_count;
-	iface->cs_block_tx = settings->block_tx;
+	hapd->cs_freq_params = settings->freq_params;
+	hapd->cs_count = settings->cs_count;
+	hapd->cs_block_tx = settings->block_tx;
 
-	ret = hostapd_build_beacon_data(iface, &settings->beacon_csa);
+	ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
 	if (ret) {
 		free_beacon_data(&settings->beacon_after);
 		return ret;
 	}
 
-	settings->counter_offset_beacon = iface->cs_c_off_beacon;
-	settings->counter_offset_presp = iface->cs_c_off_proberesp;
+	settings->counter_offset_beacon = hapd->cs_c_off_beacon;
+	settings->counter_offset_presp = hapd->cs_c_off_proberesp;
 
 	return 0;
 }
@@ -2350,13 +2350,12 @@ static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
 
 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
 {
-	os_memset(&hapd->iface->cs_freq_params, 0,
-		  sizeof(hapd->iface->cs_freq_params));
-	hapd->iface->cs_count = 0;
-	hapd->iface->cs_block_tx = 0;
-	hapd->iface->cs_c_off_beacon = 0;
-	hapd->iface->cs_c_off_proberesp = 0;
-	hapd->iface->csa_in_progress = 0;
+	os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
+	hapd->cs_count = 0;
+	hapd->cs_block_tx = 0;
+	hapd->cs_c_off_beacon = 0;
+	hapd->cs_c_off_proberesp = 0;
+	hapd->csa_in_progress = 0;
 }
 
 
@@ -2364,7 +2363,7 @@ int hostapd_switch_channel(struct hostapd_data *hapd,
 			   struct csa_settings *settings)
 {
 	int ret;
-	ret = hostapd_fill_csa_settings(hapd->iface, settings);
+	ret = hostapd_fill_csa_settings(hapd, settings);
 	if (ret)
 		return ret;
 
@@ -2378,7 +2377,7 @@ int hostapd_switch_channel(struct hostapd_data *hapd,
 		return ret;
 	}
 
-	hapd->iface->csa_in_progress = 1;
+	hapd->csa_in_progress = 1;
 	return 0;
 }
 

src/ap/hostapd.h

@@ -210,6 +210,14 @@ struct hostapd_data {
 			   size_t psk_len);
 	void *new_psk_cb_ctx;
 
+	/* channel switch parameters */
+	struct hostapd_freq_params cs_freq_params;
+	u8 cs_count;
+	int cs_block_tx;
+	unsigned int cs_c_off_beacon;
+	unsigned int cs_c_off_proberesp;
+	int csa_in_progress;
+
 #ifdef CONFIG_P2P
 	struct p2p_data *p2p;
 	struct p2p_group *p2p_group;
@@ -343,14 +351,6 @@ struct hostapd_iface {
 	/* lowest observed noise floor in dBm */
 	s8 lowest_nf;
 
-	/* channel switch parameters */
-	struct hostapd_freq_params cs_freq_params;
-	u8 cs_count;
-	int cs_block_tx;
-	unsigned int cs_c_off_beacon;
-	unsigned int cs_c_off_proberesp;
-	int csa_in_progress;
-
 	unsigned int dfs_cac_ms;
 	struct os_reltime dfs_cac_start;
 

src/drivers/driver_nl80211.c

@@ -1680,7 +1680,7 @@ static void mlme_event_ch_switch(struct wpa_driver_nl80211_data *drv,
 
 	bss->freq = data.ch_switch.freq;
 
-	wpa_supplicant_event(drv->ctx, EVENT_CH_SWITCH, &data);
+	wpa_supplicant_event(bss->ctx, EVENT_CH_SWITCH, &data);
 }
 
 
@@ -12118,7 +12118,7 @@ static int nl80211_switch_channel(void *priv, struct csa_settings *settings)
 		return -ENOMEM;
 
 	nl80211_cmd(drv, msg, 0, NL80211_CMD_CHANNEL_SWITCH);
-	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
 	NLA_PUT_U32(msg, NL80211_ATTR_CH_SWITCH_COUNT, settings->cs_count);
 	ret = nl80211_put_freq_params(msg, &settings->freq_params);
 	if (ret)