This patch populates the GATT database with the GAP and GATT services.
---
tools/btgatt-server.c | 259 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 259 insertions(+)
diff --git a/tools/btgatt-server.c b/tools/btgatt-server.c
index e185413..545c8c4 100644
--- a/tools/btgatt-server.c
+++ b/tools/btgatt-server.c
@@ -42,12 +42,18 @@
#define ATT_CID 4
+#define UUID_GAP 0x1800
+
#define PRLOG(...) \
do { \
printf(__VA_ARGS__); \
print_prompt(); \
} while (0)
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
#define COLOR_OFF "\x1B[0m"
#define COLOR_RED "\x1B[0;91m"
#define COLOR_GREEN "\x1B[0;92m"
@@ -57,12 +63,19 @@
#define COLOR_BOLDGRAY "\x1B[1;30m"
#define COLOR_BOLDWHITE "\x1B[1;37m"
+static const char test_device_name[] = "Very Long Test Device Name For Testing "
+ "ATT Protocol Operations On GATT Server";
static bool verbose = false;
struct server {
int fd;
struct gatt_db *db;
struct bt_gatt_server *gatt;
+
+ uint8_t *device_name;
+ size_t name_len;
+
+ bool svc_chngd_enabled;
};
static void print_prompt(void)
@@ -93,10 +106,243 @@ static void gatt_debug_cb(const char *str, void *user_data)
PRLOG(COLOR_GREEN "%s%s\n" COLOR_OFF, prefix, str);
}
+static void gap_device_name_read_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ struct server *server = user_data;
+ uint8_t error = 0;
+ size_t len = 0;
+ const uint8_t *value = NULL;
+
+ PRLOG("GAP Device Name Read called\n");
+
+ len = server->name_len;
+
+ if (offset > len) {
+ error = BT_ATT_ERROR_INVALID_OFFSET;
+ goto done;
+ }
+
+ len -= offset;
+ value = len ? &server->device_name[offset] : NULL;
+
+done:
+ gatt_db_attribute_read_result(attrib, id, error, value, len);
+}
+
+static void gap_device_name_write_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ const uint8_t *value, size_t len,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ struct server *server = user_data;
+ uint8_t error = 0;
+
+ PRLOG("GAP Device Name Write called\n");
+
+ /* Implement this as a variable length attribute value. */
+ if (offset > server->name_len) {
+ error = BT_ATT_ERROR_INVALID_OFFSET;
+ goto done;
+ }
+
+ if (offset + len != server->name_len) {
+ uint8_t *name;
+
+ name = realloc(server->device_name, offset + len);
+ if (!name) {
+ error = BT_ATT_ERROR_INSUFFICIENT_RESOURCES;
+ goto done;
+ }
+
+ memcpy(name, server->device_name,
+ MIN(offset + len, server->name_len));
+ server->device_name = name;
+ server->name_len = offset + len;
+ }
+
+ if (value)
+ memcpy(server->device_name + offset, value, len);
+
+done:
+ gatt_db_attribute_write_result(attrib, id, error);
+}
+
+static void gap_device_name_ext_prop_read_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ uint8_t value[2];
+
+ PRLOG("Device Name Extended Properties Read called\n");
+
+ value[0] = BT_GATT_CHRC_EXT_PROP_RELIABLE_WRITE;
+ value[1] = 0;
+
+ gatt_db_attribute_read_result(attrib, id, 0, value, sizeof(value));
+}
+
+static void gatt_service_changed_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ PRLOG("Service Changed Read called\n");
+
+ gatt_db_attribute_read_result(attrib, id, 0, NULL, 0);
+}
+
+static void gatt_svc_chngd_ccc_read_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ struct server *server = user_data;
+ uint8_t value[2];
+
+ PRLOG("Service Changed CCC Read called\n");
+
+ value[0] = server->svc_chngd_enabled ? 0x02 : 0x00;
+ value[1] = 0x00;
+
+ gatt_db_attribute_read_result(attrib, id, 0, value, sizeof(value));
+}
+
+static void gatt_svc_chngd_ccc_write_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ const uint8_t *value, size_t len,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ void *user_data)
+{
+ struct server *server = user_data;
+ uint8_t ecode = 0;
+
+ PRLOG("Service Changed CCC Write called\n");
+
+ if (!value || len != 2) {
+ ecode = BT_ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LEN;
+ goto done;
+ }
+
+ if (offset) {
+ ecode = BT_ATT_ERROR_INVALID_OFFSET;
+ goto done;
+ }
+
+ if (value[0] == 0x00)
+ server->svc_chngd_enabled = false;
+ else if (value[0] == 0x02)
+ server->svc_chngd_enabled = true;
+ else
+ ecode = 0x80;
+
+ PRLOG("Service Changed Enabled: %s\n",
+ server->svc_chngd_enabled ? "true" : "false");
+
+done:
+ gatt_db_attribute_write_result(attrib, id, ecode);
+}
+
+static void confirm_write(struct gatt_db_attribute *attr, int err,
+ void *user_data)
+{
+ if (!err)
+ return;
+
+ fprintf(stderr, "Error caching attribute %p - err: %d\n", attr, err);
+ exit(1);
+}
+
+static void populate_gap_service(struct server *server)
+{
+ bt_uuid_t uuid;
+ struct gatt_db_attribute *service, *tmp;
+ uint16_t appearance;
+
+ /* Add the GAP service */
+ bt_uuid16_create(&uuid, UUID_GAP);
+ service = gatt_db_add_service(server->db, &uuid, true, 6);
+
+ /*
+ * Device Name characteristic. Make the value dynamically read and
+ * written via callbacks.
+ */
+ bt_uuid16_create(&uuid, GATT_CHARAC_DEVICE_NAME);
+ gatt_db_service_add_characteristic(service, &uuid,
+ BT_ATT_PERM_READ | BT_ATT_PERM_WRITE,
+ BT_GATT_CHRC_PROP_READ,
+ gap_device_name_read_cb,
+ gap_device_name_write_cb,
+ server);
+
+ bt_uuid16_create(&uuid, GATT_CHARAC_EXT_PROPER_UUID);
+ gatt_db_service_add_descriptor(service, &uuid, BT_ATT_PERM_READ,
+ gap_device_name_ext_prop_read_cb,
+ NULL, server);
+
+ /*
+ * Appearance characteristic. Reads and writes should obtain the value
+ * from the database.
+ */
+ bt_uuid16_create(&uuid, GATT_CHARAC_APPEARANCE);
+ tmp = gatt_db_service_add_characteristic(service, &uuid,
+ BT_ATT_PERM_READ,
+ BT_GATT_CHRC_PROP_READ,
+ NULL, NULL, server);
+
+ /*
+ * Write the appearance value to the database, since we're not using a
+ * callback.
+ */
+ put_le16(128, &appearance);
+ gatt_db_attribute_write(tmp, 0, (void *) &appearance,
+ sizeof(appearance),
+ BT_ATT_OP_WRITE_REQ,
+ NULL, confirm_write,
+ NULL);
+
+ gatt_db_service_set_active(service, true);
+}
+
+static void populate_gatt_service(struct server *server)
+{
+ bt_uuid_t uuid;
+ struct gatt_db_attribute *service;
+
+ /* Add the GATT service */
+ bt_uuid16_create(&uuid, 0x1801);
+ service = gatt_db_add_service(server->db, &uuid, true, 4);
+
+ bt_uuid16_create(&uuid, GATT_CHARAC_SERVICE_CHANGED);
+ gatt_db_service_add_characteristic(service, &uuid, BT_ATT_PERM_READ,
+ BT_GATT_CHRC_PROP_READ | BT_GATT_CHRC_PROP_INDICATE,
+ gatt_service_changed_cb,
+ NULL, server);
+
+ bt_uuid16_create(&uuid, GATT_CLIENT_CHARAC_CFG_UUID);
+ gatt_db_service_add_descriptor(service, &uuid,
+ BT_ATT_PERM_READ | BT_ATT_PERM_WRITE,
+ gatt_svc_chngd_ccc_read_cb,
+ gatt_svc_chngd_ccc_write_cb, server);
+
+ gatt_db_service_set_active(service, true);
+}
+
+static void populate_db(struct server *server)
+{
+ populate_gap_service(server);
+ populate_gatt_service(server);
+}
+
static struct server *server_create(int fd, uint16_t mtu)
{
struct server *server;
struct bt_att *att;
+ size_t name_len = strlen(test_device_name);
server = new0(struct server, 1);
if (!server) {
@@ -120,6 +366,16 @@ static struct server *server_create(int fd, uint16_t mtu)
goto fail;
}
+ server->name_len = name_len + 1;
+ server->device_name = malloc(name_len + 1);
+ if (!server->device_name) {
+ fprintf(stderr, "Failed to allocate memory for device name\n");
+ goto fail;
+ }
+
+ memcpy(server->device_name, test_device_name, name_len);
+ server->device_name[name_len] = '\0';
+
server->fd = fd;
server->db = gatt_db_new();
if (!server->db) {
@@ -142,10 +398,13 @@ static struct server *server_create(int fd, uint16_t mtu)
/* bt_gatt_server already holds a reference */
bt_att_unref(att);
+ populate_db(server);
+
return server;
fail:
gatt_db_destroy(server->db);
+ free(server->device_name);
bt_att_unref(att);
free(server);
--
2.1.0.rc2.206.gedb03e5
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