mesh: Make BSSBasicRateSet configurable

STAs that have different BSSBasicRateSet cannot connect to each other
as per IEEE 802.11s-2011 9.6.0c1:

"A mesh STA shall not establish a mesh peering with a mesh STA using a
different BSSBasicRateSet."

Make BSSBasicRateSet configurable to improve interoperability with other
stations.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>

wpa_supplicant/config.c

@@ -1617,7 +1617,31 @@ static int wpa_config_parse_mesh_ht_mode(const struct parse_data *data,
 }
 
 
+static int wpa_config_parse_mesh_basic_rates(const struct parse_data *data,
+					     struct wpa_ssid *ssid, int line,
+					     const char *value)
+{
+	int *rates = wpa_config_parse_int_array(value);
+
+	if (rates == NULL) {
+		wpa_printf(MSG_ERROR, "Line %d: Invalid mesh_basic_rates '%s'",
+			   line, value);
+		return -1;
+	}
+	if (rates[0] == 0) {
+		os_free(rates);
+		rates = NULL;
+	}
+
+	os_free(ssid->mesh_basic_rates);
+	ssid->mesh_basic_rates = rates;
+
+	return 0;
+}
+
+
 #ifndef NO_CONFIG_WRITE
+
 static char * wpa_config_write_mesh_ht_mode(const struct parse_data *data,
 					    struct wpa_ssid *ssid)
 {
@@ -1643,6 +1667,13 @@ static char * wpa_config_write_mesh_ht_mode(const struct parse_data *data,
 	return val ? os_strdup(val) : NULL;
 }
 
+
+static char * wpa_config_write_mesh_basic_rates(const struct parse_data *data,
+						struct wpa_ssid *ssid)
+{
+	return wpa_config_write_freqs(data, ssid->mesh_basic_rates);
+}
+
 #endif /* NO_CONFIG_WRITE */
 
 #endif /* CONFIG_MESH */
@@ -1819,6 +1850,7 @@ static const struct parse_data ssid_fields[] = {
 	{ INT_RANGE(frequency, 0, 65000) },
 #ifdef CONFIG_MESH
 	{ FUNC(mesh_ht_mode) },
+	{ FUNC(mesh_basic_rates) },
 #endif /* CONFIG_MESH */
 	{ INT(wpa_ptk_rekey) },
 	{ STR(bgscan) },
@@ -2049,6 +2081,9 @@ void wpa_config_free_ssid(struct wpa_ssid *ssid)
 #ifdef CONFIG_HT_OVERRIDES
 	os_free(ssid->ht_mcs);
 #endif /* CONFIG_HT_OVERRIDES */
+#ifdef CONFIG_MESH
+	os_free(ssid->mesh_basic_rates);
+#endif /* CONFIG_MESH */
 	while ((psk = dl_list_first(&ssid->psk_list, struct psk_list_entry,
 				    list))) {
 		dl_list_del(&psk->list);

wpa_supplicant/config_file.c

@@ -743,7 +743,10 @@ static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 	INT(update_identifier);
 #endif /* CONFIG_HS20 */
 	write_int(f, "mac_addr", ssid->mac_addr, -1);
+#ifdef CONFIG_MESH
 	STR(mesh_ht_mode);
+	STR(mesh_basic_rates);
+#endif /* CONFIG_MESH */
 
 #undef STR
 #undef INT

wpa_supplicant/config_ssid.h

@@ -413,6 +413,12 @@ struct wpa_ssid {
 	 */
 	int mesh_ht_mode;
 
+	/**
+	 * mesh_basic_rates - BSS Basic rate set for mesh network
+	 *
+	 */
+	int *mesh_basic_rates;
+
 	int ht40;
 
 	int vht;

wpa_supplicant/mesh.c

@@ -122,6 +122,7 @@ static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
 	int basic_rates_erp[] = { 10, 20, 55, 60, 110, 120, 240, -1 };
 	static int default_groups[] = { 19, 20, 21, 25, 26, -1 };
 	size_t len;
+	int rate_len;
 
 	if (!wpa_s->conf->user_mpm) {
 		/* not much for us to do here */
@@ -186,12 +187,13 @@ static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
 		goto out_free;
 	}
 
+	if (ssid->mesh_basic_rates == NULL) {
 		/*
-	 * XXX: Hack! This is so an MPM which correctly sets the ERP mandatory
+		 * XXX: Hack! This is so an MPM which correctly sets the ERP
-	 * rates as BSSBasicRateSet doesn't reject us. We could add a new
+		 * mandatory rates as BSSBasicRateSet doesn't reject us. We
-	 * hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but this is way easier. This
+		 * could add a new hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but
-	 * also makes our BSSBasicRateSet advertised in Beacon frames match the
+		 * this is way easier. This also makes our BSSBasicRateSet
-	 * one in peering frames, sigh.
+		 * advertised in beacons match the one in peering frames, sigh.
 		 */
 		if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
 			conf->basic_rates = os_malloc(sizeof(basic_rates_erp));
@@ -200,6 +202,20 @@ static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
 			os_memcpy(conf->basic_rates, basic_rates_erp,
 				  sizeof(basic_rates_erp));
 		}
+	} else {
+		rate_len = 0;
+		while (1) {
+			if (ssid->mesh_basic_rates[rate_len] < 1)
+				break;
+			rate_len++;
+		}
+		conf->basic_rates = os_calloc(rate_len + 1, sizeof(int));
+		if (conf->basic_rates == NULL)
+			goto out_free;
+		os_memcpy(conf->basic_rates, ssid->mesh_basic_rates,
+			  rate_len * sizeof(int));
+		conf->basic_rates[rate_len] = -1;
+	}
 
 	if (hostapd_setup_interface(ifmsh)) {
 		wpa_printf(MSG_ERROR,