tethering: Add possibility to configure the access point frequency

When the tethering mode is started, a WiFi AP is created using the fixed
channel 1 (2412 MHz). Add a way to configure the channel.

5 files changed, 52 insertions, 7 deletions

diff --git a/include/technology.h b/include/technology.h
index 381a48df..fcd658e8 100644
--- a/include/technology.h
+++ b/include/technology.h
@@ -46,7 +46,7 @@ enum connman_service_type connman_technology_get_type
 				(struct connman_technology *technology);
 
 bool connman_technology_get_wifi_tethering(const struct connman_technology *technology,
-					const char **ssid, const char **psk);
+					const char **ssid, const char **psk, int *freq);
 
 bool connman_technology_is_tethering_allowed(enum connman_service_type type);
 
diff --git a/plugins/iwd.c b/plugins/iwd.c
index 1c46c649..b0e17a4d 100644
--- a/plugins/iwd.c
+++ b/plugins/iwd.c
@@ -822,8 +822,9 @@ static int cm_tech_tethering(struct connman_technology *technology,
 	int err = 0, res;
 	const char *ssid;
 	const char *psk;
+	int freq;
 
-	connman_technology_get_wifi_tethering(technology, &ssid, &psk);
+	connman_technology_get_wifi_tethering(technology, &ssid, &psk, &freq);
 
 	g_hash_table_iter_init(&iter, devices);
 
diff --git a/plugins/neard.c b/plugins/neard.c
index 051978e9..caaea853 100644
--- a/plugins/neard.c
+++ b/plugins/neard.c
@@ -223,9 +223,9 @@ static DBusMessage *create_request_oob_reply(DBusMessage *message)
 	DBusMessageIter dict;
 	const char *ssid, *psk;
 	uint8_t *tlv_msg;
-	int length;
+	int length, freq;
 
-	if (!connman_technology_get_wifi_tethering(NULL, &ssid, &psk))
+	if (!connman_technology_get_wifi_tethering(NULL, &ssid, &psk, &freq))
 		return get_reply_on_error(message, ENOTSUP);
 
 	tlv_msg = encode_to_tlv(ssid, psk, &length);
diff --git a/plugins/wifi.c b/plugins/wifi.c
index de5356bf..e947b169 100644
--- a/plugins/wifi.c
+++ b/plugins/wifi.c
@@ -3337,6 +3337,7 @@ static GSupplicantSSID *ssid_ap_init(const struct connman_technology *technology
 {
 	GSupplicantSSID *ap;
 	const char *ssid, *passphrase;
+	int freq;
 	bool ret;
 
 	ap = g_try_malloc0(sizeof(GSupplicantSSID));
@@ -3344,7 +3345,8 @@ static GSupplicantSSID *ssid_ap_init(const struct connman_technology *technology
 		return NULL;
 
 	ret = connman_technology_get_wifi_tethering(technology,
-						&ssid, &passphrase);
+						&ssid, &passphrase,
+						&freq);
 	if (ret == false)
 		return NULL;
 
@@ -3352,7 +3354,10 @@ static GSupplicantSSID *ssid_ap_init(const struct connman_technology *technology
 	ap->ssid = ssid;
 	ap->ssid_len = strlen(ssid);
 	ap->scan_ssid = 0;
-	ap->freq = 2412;
+	if (freq)
+		ap->freq = freq;
+	else
+		ap->freq = 2412;
 
 	if (!passphrase || strlen(passphrase) == 0) {
 		ap->security = G_SUPPLICANT_SECURITY_NONE;
diff --git a/src/technology.c b/src/technology.c
index 8548f6d4..97419150 100644
--- a/src/technology.c
+++ b/src/technology.c
@@ -66,6 +66,7 @@ struct connman_technology {
 					      */
 	char *tethering_ident;
 	char *tethering_passphrase;
+	int tethering_freq;
 
 	bool enable_persistent; /* Save the tech state */
 
@@ -192,6 +193,13 @@ static void technology_save(struct connman_technology *technology)
 		g_free(enc);
 	}
 
+	if (technology->tethering_freq == 0)
+		technology->tethering_freq = 2412;
+
+	g_key_file_set_integer(keyfile, identifier,
+				"Tethering.Freq",
+				technology->tethering_freq);
+
 done:
 	g_free(identifier);
 
@@ -356,7 +364,8 @@ enum connman_service_type connman_technology_get_type
 }
 
 bool connman_technology_get_wifi_tethering(const struct connman_technology *technology,
-					const char **ssid, const char **psk)
+					const char **ssid, const char **psk,
+					int *freq)
 {
 	if (!ssid || !psk)
 		return false;
@@ -375,6 +384,7 @@ bool connman_technology_get_wifi_tethering(const struct connman_technology *tech
 
 	*ssid = technology->tethering_ident;
 	*psk = technology->tethering_passphrase;
+	*freq = technology->tethering_freq;
 
 	return true;
 }
@@ -443,6 +453,10 @@ static void technology_load(struct connman_technology *technology)
 				identifier, "Tethering.Passphrase", NULL);
 	if (enc)
 		technology->tethering_passphrase = g_strcompress(enc);
+
+	technology->tethering_freq = g_key_file_get_integer(keyfile,
+				identifier, "Tethering.Freq", NULL);
+
 done:
 	g_free(identifier);
 
@@ -554,6 +568,10 @@ static void append_properties(DBusMessageIter *iter,
 					DBUS_TYPE_STRING,
 					&technology->tethering_passphrase);
 
+	connman_dbus_dict_append_basic(&dict, "TetheringFreq",
+				DBUS_TYPE_INT32,
+				&technology->tethering_freq);
+
 	connman_dbus_dict_close(iter, &dict);
 }
 
@@ -968,6 +986,27 @@ static DBusMessage *set_property(DBusConnection *conn,
 					DBUS_TYPE_STRING,
 					&technology->tethering_passphrase);
 		}
+	} else if (g_str_equal(name, "TetheringFreq")) {
+		dbus_int32_t freq;
+
+		if (type != DBUS_TYPE_INT32)
+			return __connman_error_invalid_arguments(msg);
+
+		dbus_message_iter_get_basic(&value, &freq);
+
+		if (technology->type != CONNMAN_SERVICE_TYPE_WIFI)
+			return __connman_error_not_supported(msg);
+
+		if (freq >= 0) {
+			technology->tethering_freq = freq;
+			technology_save(technology);
+
+			connman_dbus_property_changed_basic(technology->path,
+					CONNMAN_TECHNOLOGY_INTERFACE,
+					"TetheringFreq",
+					DBUS_TYPE_INT32,
+					&technology->tethering_freq);
+		}
 	} else if (g_str_equal(name, "Powered")) {
 		dbus_bool_t enable;