This patch rewrites the GAP profile to use the shared GATT stack instead
of GAttrib. The profile now also handles the Device Name characteristic.
---
profiles/gap/gas.c | 226 +++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 167 insertions(+), 59 deletions(-)
diff --git a/profiles/gap/gas.c b/profiles/gap/gas.c
index a4028dd..0b5e6ee 100644
--- a/profiles/gap/gas.c
+++ b/profiles/gap/gas.c
@@ -19,6 +19,7 @@
#include <config.h>
#endif
+#include <ctype.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/types.h>
@@ -36,30 +37,34 @@
#include "src/profile.h"
#include "src/service.h"
#include "src/shared/util.h"
-#include "attrib/att.h"
-#include "attrib/gattrib.h"
-#include "src/attio.h"
-#include "attrib/gatt.h"
#include "src/log.h"
#include "src/textfile.h"
+#include "src/shared/att.h"
+#include "src/shared/queue.h"
+#include "src/shared/gatt-db.h"
+#include "src/shared/gatt-client.h"
+#include "src/gatt-callbacks.h"
/* Generic Attribute/Access Service */
struct gas {
struct btd_device *device;
- struct att_range gap; /* GAP Primary service range */
- GAttrib *attrib;
- guint attioid;
+ struct gatt_db *db;
+ struct bt_gatt_client *client;
+ uint16_t start_handle, end_handle;
+ unsigned int gatt_cb_id;
};
static GSList *devices;
static void gas_free(struct gas *gas)
{
- if (gas->attioid)
- btd_device_remove_attio_callback(gas->device, gas->attioid);
+ if (gas->gatt_cb_id)
+ btd_device_remove_gatt_callbacks(gas->device,
+ gas->gatt_cb_id);
- g_attrib_unref(gas->attrib);
btd_device_unref(gas->device);
+ gatt_db_unref(gas->db);
+ bt_gatt_client_unref(gas->client);
g_free(gas);
}
@@ -71,83 +76,194 @@ static int cmp_device(gconstpointer a, gconstpointer b)
return gas->device == device ? 0 : -1;
}
-static void gap_appearance_cb(guint8 status, const guint8 *pdu, guint16 plen,
- gpointer user_data)
+static char *name2utf8(const uint8_t *name, uint8_t len)
+{
+ char utf8_name[HCI_MAX_NAME_LENGTH + 2];
+ int i;
+
+ if (g_utf8_validate((const char *) name, len, NULL))
+ return g_strndup((char *) name, len);
+
+ memset(utf8_name, 0, sizeof(utf8_name));
+ strncpy(utf8_name, (char *) name, len);
+
+ /* Assume ASCII, and replace all non-ASCII with spaces */
+ for (i = 0; utf8_name[i] != '\0'; i++) {
+ if (!isascii(utf8_name[i]))
+ utf8_name[i] = ' ';
+ }
+
+ /* Remove leading and trailing whitespace characters */
+ g_strstrip(utf8_name);
+
+ return g_strdup(utf8_name);
+}
+
+static void read_device_name_cb(bool success, uint8_t att_ecode,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
{
struct gas *gas = user_data;
- struct att_data_list *list = NULL;
- uint16_t app;
- uint8_t *atval;
+ char *name = name2utf8(value, length);
- if (status != 0) {
- error("Read characteristics by UUID failed: %s",
- att_ecode2str(status));
+ DBG("GAP Device Name: %s", name);
+
+ btd_device_device_set_name(gas->device, name);
+}
+
+static void handle_device_name(struct gas *gas, uint16_t value_handle)
+{
+ if (!bt_gatt_client_read_long_value(gas->client, value_handle, 0,
+ read_device_name_cb, gas, NULL))
+ DBG("Failed to send request to read device name");
+}
+
+static void read_appearance_cb(bool success, uint8_t att_ecode,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
+{
+ struct gas *gas = user_data;
+ uint16_t appearance;
+
+ if (!success) {
+ DBG("Reading appearance failed with ATT error: %u", att_ecode);
return;
}
- list = dec_read_by_type_resp(pdu, plen);
- if (list == NULL)
+ /* The appearance value is a 16-bit unsigned integer */
+ if (length != 2) {
+ DBG("Malformed appearance value");
return;
-
- if (list->len != 4) {
- error("GAP Appearance value: invalid data");
- goto done;
}
- atval = list->data[0] + 2; /* skip handle value */
- app = get_le16(atval);
+ appearance = get_le16(value);
- DBG("GAP Appearance: 0x%04x", app);
+ DBG("GAP Appearance: 0x%04x", appearance);
- device_set_appearance(gas->device, app);
+ device_set_appearance(gas->device, appearance);
+}
-done:
- att_data_list_free(list);
+static void handle_appearance(struct gas *gas, uint16_t value_handle)
+{
+ if (!bt_gatt_client_read_value(gas->client, value_handle,
+ read_appearance_cb, gas, NULL))
+ DBG("Failed to send request to read appearance");
}
-static void attio_connected_cb(GAttrib *attrib, gpointer user_data)
+static bool uuid_cmp(uint16_t u16, const bt_uuid_t *uuid)
+{
+ bt_uuid_t lhs;
+
+ bt_uuid16_create(&lhs, u16);
+
+ return bt_uuid_cmp(&lhs, uuid) == 0;
+}
+
+static void handle_characteristic(struct gatt_db_attribute *attr,
+ void *user_data)
{
struct gas *gas = user_data;
- uint16_t app;
+ uint16_t value_handle;
+ bt_uuid_t uuid;
+
+ if (!gatt_db_attribute_get_char_data(attr, NULL, &value_handle, NULL,
+ &uuid)) {
+ error("Failed to obtain characteristic data");
+ return;
+ }
- gas->attrib = g_attrib_ref(attrib);
+ if (uuid_cmp(GATT_CHARAC_DEVICE_NAME, &uuid))
+ handle_device_name(gas, value_handle);
+ else if (uuid_cmp(GATT_CHARAC_APPEARANCE, &uuid))
+ handle_appearance(gas, value_handle);
+ else {
+ char uuid_str[MAX_LEN_UUID_STR];
- if (device_get_appearance(gas->device, &app) < 0) {
- bt_uuid_t uuid;
+ /* TODO: Support peripheral privacy feature */
- bt_uuid16_create(&uuid, GATT_CHARAC_APPEARANCE);
+ bt_uuid_to_string(&uuid, uuid_str, sizeof(uuid_str));
+ DBG("Unsupported characteristic: %s", uuid_str);
+ }
+}
+
+static void handle_service(struct gatt_db_attribute *attr, void *user_data)
+{
+ struct gas *gas = user_data;
- gatt_read_char_by_uuid(gas->attrib, gas->gap.start,
- gas->gap.end, &uuid,
- gap_appearance_cb, gas);
+ if (gas->start_handle) {
+ error("More than one GAP service exists on device");
+ return;
}
- /* TODO: Read other GAP characteristics - See Core spec page 1739 */
+ gatt_db_attribute_get_service_handles(attr, &gas->start_handle,
+ &gas->end_handle);
+ gatt_db_service_foreach_char(attr, handle_characteristic, gas);
}
-static void attio_disconnected_cb(gpointer user_data)
+static void handle_gap_service(struct gas *gas)
+{
+ bt_uuid_t uuid;
+
+ bt_string_to_uuid(&uuid, GAP_UUID);
+
+ gatt_db_foreach_service(gas->db, &uuid, handle_service, gas);
+}
+
+static void gatt_client_ready_cb(struct bt_gatt_client *client,
+ struct gatt_db *db, void *user_data)
{
struct gas *gas = user_data;
- g_attrib_unref(gas->attrib);
- gas->attrib = NULL;
+ gas->client = bt_gatt_client_ref(client);
+ gas->db = gatt_db_ref(db);
+
+ handle_gap_service(gas);
}
-static int gas_register(struct btd_device *device, struct att_range *gap)
+static void gatt_client_disconn_cb(void *user_data)
+{
+ struct gas *gas = user_data;
+
+ gatt_db_unref(gas->db);
+ bt_gatt_client_unref(gas->client);
+
+ gas->db = NULL;
+ gas->client = NULL;
+ gas->start_handle = gas->end_handle = 0;
+}
+
+static int gas_register(struct btd_device *device)
{
struct gas *gas;
+ GSList *l;
+
+ /*
+ * There can't be more than one instance of the GAP service on the same
+ * device.
+ */
+ l = g_slist_find_custom(devices, device, cmp_device);
+ if (l)
+ return 0;
gas = g_new0(struct gas, 1);
- gas->gap.start = gap->start;
- gas->gap.end = gap->end;
gas->device = btd_device_ref(device);
-
devices = g_slist_append(devices, gas);
- gas->attioid = btd_device_add_attio_callback(device,
- attio_connected_cb,
- attio_disconnected_cb, gas);
+ /*
+ * Simply register the callbacks. We will perform initialization during
+ * the ready callback once the gatt-client has been initialized for this
+ * device.
+ *
+ * Here we don't register the service removed handler since the
+ * GAP service is mandatory and should not get removed while the device
+ * is connected.
+ */
+ gas->gatt_cb_id = btd_device_add_gatt_callbacks(device,
+ gatt_client_ready_cb,
+ NULL,
+ gatt_client_disconn_cb,
+ gas);
return 0;
}
@@ -169,16 +285,8 @@ static void gas_unregister(struct btd_device *device)
static int gap_driver_probe(struct btd_service *service)
{
struct btd_device *device = btd_service_get_device(service);
- struct gatt_primary *gap;
-
- gap = btd_device_get_primary(device, GAP_UUID);
-
- if (gap == NULL) {
- error("GAP service is mandatory");
- return -EINVAL;
- }
- return gas_register(device, &gap->range);
+ return gas_register(device);
}
static void gap_driver_remove(struct btd_service *service)
--
2.2.0.rc0.207.ga3a616c
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
