ATT MTU exchange and handling of indications from the "Service Changed"
characteristic are now handled by shared/gatt-client, so this profile
should only deal with the GAP service.
---
profiles/gatt/gas.c | 248 ++--------------------------------------------------
1 file changed, 5 insertions(+), 243 deletions(-)
diff --git a/profiles/gatt/gas.c b/profiles/gatt/gas.c
index b51b4a8..75929c1 100644
--- a/profiles/gatt/gas.c
+++ b/profiles/gatt/gas.c
@@ -52,12 +52,8 @@
struct gas {
struct btd_device *device;
struct att_range gap; /* GAP Primary service range */
- struct att_range gatt; /* GATT Primary service range */
GAttrib *attrib;
guint attioid;
- guint changed_ind;
- uint16_t changed_handle;
- uint16_t mtu;
};
static GSList *devices = NULL;
@@ -80,68 +76,6 @@ static int cmp_device(gconstpointer a, gconstpointer b)
return (gas->device == device ? 0 : -1);
}
-static void write_ctp_handle(struct btd_device *device, uint16_t uuid,
- uint16_t handle)
-{
- char *filename, group[6], value[7];
- GKeyFile *key_file;
- char *data;
- gsize length = 0;
-
- filename = btd_device_get_storage_path(device, "gatt");
- if (!filename) {
- warn("Unable to get gatt storage path for device");
- return;
- }
-
- key_file = g_key_file_new();
- g_key_file_load_from_file(key_file, filename, 0, NULL);
-
- snprintf(group, sizeof(group), "%hu", uuid);
- snprintf(value, sizeof(value), "0x%4.4X", handle);
- g_key_file_set_string(key_file, group, "Value", value);
-
- data = g_key_file_to_data(key_file, &length, NULL);
- if (length > 0) {
- create_file(filename, S_IRUSR | S_IWUSR);
- g_file_set_contents(filename, data, length, NULL);
- }
-
- g_free(data);
- g_free(filename);
- g_key_file_free(key_file);
-}
-
-static int read_ctp_handle(struct btd_device *device, uint16_t uuid,
- uint16_t *value)
-{
- char *filename, group[6];
- GKeyFile *key_file;
- char *str;
- int err = 0;
-
- filename = btd_device_get_storage_path(device, "gatt");
- if (!filename) {
- warn("Unable to get gatt storage path for device");
- return -ENOENT;
- }
-
- snprintf(group, sizeof(group), "%hu", uuid);
-
- key_file = g_key_file_new();
- g_key_file_load_from_file(key_file, filename, 0, NULL);
-
- str = g_key_file_get_string(key_file, group, "Value", NULL);
- if (str == NULL || sscanf(str, "%hx", value) != 1)
- err = -ENOENT;
-
- g_free(str);
- g_free(filename);
- g_key_file_free(key_file);
-
- return err;
-}
-
static void gap_appearance_cb(guint8 status, const guint8 *pdu, guint16 plen,
gpointer user_data)
{
@@ -176,164 +110,16 @@ done:
att_data_list_free(list);
}
-static void indication_cb(const uint8_t *pdu, uint16_t len, gpointer user_data)
-{
- uint8_t bdaddr_type;
- struct gas *gas = user_data;
- uint16_t start, end, olen;
- size_t plen;
- uint8_t *opdu;
-
- if (len < 7) { /* 1-byte opcode + 2-byte handle + 4 range */
- error("Malformed ATT notification");
- return;
- }
-
- start = get_le16(&pdu[3]);
- end = get_le16(&pdu[5]);
-
- DBG("Service Changed start: 0x%04X end: 0x%04X", start, end);
-
- /* Confirming indication received */
- opdu = g_attrib_get_buffer(gas->attrib, &plen);
- olen = enc_confirmation(opdu, plen);
- g_attrib_send(gas->attrib, 0, opdu, olen, NULL, NULL, NULL);
-
- bdaddr_type = btd_device_get_bdaddr_type(gas->device);
- if (!device_is_bonded(gas->device, bdaddr_type)) {
- DBG("Ignoring Service Changed: device is not bonded");
- return;
- }
-
- btd_device_gatt_set_service_changed(gas->device, start, end);
-}
-
-static void ccc_written_cb(guint8 status, const guint8 *pdu, guint16 plen,
- gpointer user_data)
-{
- struct gas *gas = user_data;
-
- if (status) {
- error("Write Service Changed CCC failed: %s",
- att_ecode2str(status));
- return;
- }
-
- DBG("Service Changed indications enabled");
-
- gas->changed_ind = g_attrib_register(gas->attrib, ATT_OP_HANDLE_IND,
- gas->changed_handle,
- indication_cb, gas, NULL);
-
- write_ctp_handle(gas->device, GATT_CHARAC_SERVICE_CHANGED,
- gas->changed_handle);
-}
-
-static void write_ccc(GAttrib *attrib, uint16_t handle, gpointer user_data)
-{
- uint8_t value[2];
-
- put_le16(GATT_CLIENT_CHARAC_CFG_IND_BIT, value);
- gatt_write_char(attrib, handle, value, sizeof(value), ccc_written_cb,
- user_data);
-}
-
-static void discover_ccc_cb(uint8_t status, GSList *descs, void *user_data)
-{
- struct gas *gas = user_data;
- struct gatt_desc *desc;
-
- if (status != 0) {
- error("Discover Service Changed CCC failed: %s",
- att_ecode2str(status));
- return;
- }
-
- /* There will be only one descriptor on list and it will be CCC */
- desc = descs->data;
-
- DBG("CCC: 0x%04x", desc->handle);
- write_ccc(gas->attrib, desc->handle, user_data);
-}
-
-static void gatt_characteristic_cb(uint8_t status, GSList *characteristics,
- void *user_data)
-{
- struct gas *gas = user_data;
- struct gatt_char *chr;
- uint16_t start, end;
- bt_uuid_t uuid;
-
- if (status) {
- error("Discover Service Changed handle: %s", att_ecode2str(status));
- return;
- }
-
- chr = characteristics->data;
-
- start = chr->value_handle + 1;
- end = gas->gatt.end;
-
- if (start > end) {
- error("Inconsistent database: Service Changed CCC missing");
- return;
- }
-
- gas->changed_handle = chr->value_handle;
-
- bt_uuid16_create(&uuid, GATT_CLIENT_CHARAC_CFG_UUID);
-
- gatt_discover_desc(gas->attrib, start, end, &uuid, discover_ccc_cb,
- gas);
-}
-
-static void exchange_mtu_cb(guint8 status, const guint8 *pdu, guint16 plen,
- gpointer user_data)
-{
- struct gas *gas = user_data;
- uint16_t rmtu;
-
- if (status) {
- error("MTU exchange: %s", att_ecode2str(status));
- return;
- }
-
- if (!dec_mtu_resp(pdu, plen, &rmtu)) {
- error("MTU exchange: protocol error");
- return;
- }
-
- gas->mtu = MIN(rmtu, gas->mtu);
- if (g_attrib_set_mtu(gas->attrib, gas->mtu))
- DBG("MTU exchange succeeded: %d", gas->mtu);
- else
- DBG("MTU exchange failed");
-}
-
static void attio_connected_cb(GAttrib *attrib, gpointer user_data)
{
struct gas *gas = user_data;
GIOChannel *io;
GError *gerr = NULL;
- uint16_t cid, imtu;
uint16_t app;
gas->attrib = g_attrib_ref(attrib);
io = g_attrib_get_channel(attrib);
- if (bt_io_get(io, &gerr, BT_IO_OPT_IMTU, &imtu,
- BT_IO_OPT_CID, &cid, BT_IO_OPT_INVALID) &&
- cid == ATT_CID) {
- gatt_exchange_mtu(gas->attrib, imtu, exchange_mtu_cb, gas);
- gas->mtu = imtu;
- DBG("MTU Exchange: Requesting %d", imtu);
- }
-
- if (gerr) {
- error("Could not acquire att imtu and cid: %s", gerr->message);
- g_error_free(gerr);
- }
-
if (device_get_appearance(gas->device, &app) < 0) {
bt_uuid_t uuid;
@@ -345,43 +131,23 @@ static void attio_connected_cb(GAttrib *attrib, gpointer user_data)
}
/* TODO: Read other GAP characteristics - See Core spec page 1739 */
-
- /*
- * When re-connecting <<Service Changed>> handle and characteristic
- * value doesn't need to read again: known information from the
- * previous interaction.
- */
- if (gas->changed_handle == 0) {
- bt_uuid_t uuid;
-
- bt_uuid16_create(&uuid, GATT_CHARAC_SERVICE_CHANGED);
-
- gatt_discover_char(gas->attrib, gas->gatt.start, gas->gatt.end,
- &uuid, gatt_characteristic_cb, gas);
- }
}
static void attio_disconnected_cb(gpointer user_data)
{
struct gas *gas = user_data;
- g_attrib_unregister(gas->attrib, gas->changed_ind);
- gas->changed_ind = 0;
-
g_attrib_unref(gas->attrib);
gas->attrib = NULL;
}
-static int gas_register(struct btd_device *device, struct att_range *gap,
- struct att_range *gatt)
+static int gas_register(struct btd_device *device, struct att_range *gap)
{
struct gas *gas;
gas = g_new0(struct gas, 1);
gas->gap.start = gap->start;
gas->gap.end = gap->end;
- gas->gatt.start = gatt->start;
- gas->gatt.end = gatt->end;
gas->device = btd_device_ref(device);
@@ -391,9 +157,6 @@ static int gas_register(struct btd_device *device, struct att_range *gap,
attio_connected_cb,
attio_disconnected_cb, gas);
- read_ctp_handle(gas->device, GATT_CHARAC_SERVICE_CHANGED,
- &gas->changed_handle);
-
return 0;
}
@@ -414,17 +177,16 @@ static void gas_unregister(struct btd_device *device)
static int gatt_driver_probe(struct btd_service *service)
{
struct btd_device *device = btd_service_get_device(service);
- struct gatt_primary *gap, *gatt;
+ struct gatt_primary *gap;
gap = btd_device_get_primary(device, GAP_UUID);
- gatt = btd_device_get_primary(device, GATT_UUID);
- if (gap == NULL || gatt == NULL) {
- error("GAP and GATT are mandatory");
+ if (gap == NULL) {
+ error("GAP service is mandatory");
return -EINVAL;
}
- return gas_register(device, &gap->range, &gatt->range);
+ return gas_register(device, &gap->range);
}
static void gatt_driver_remove(struct btd_service *service)
--
2.1.0.rc2.206.gedb03e5
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