Current implementation was tested with PTS GATT test case
TC_GAD_CL_BV_03_C.
v3:
In this version after primary service discovery,
secondary services are discovered. Next included
services are resolved. With this approach we
don't have recursively search for included service,
like it was TODO in previous proposal.
There is also small coding style fix suggested by Arman.
v4:
If no secondary services found, continue include services search (fixed
in gatt-client.c).
Fixed wrong debug logs (primary->secondary).
Fixed searching descriptors
Marcin Kraglak (14):
shared/gatt: Add discover_secondary_services()
shared/gatt: Add initial implementation of discover_included_services
shared/gatt: Discover included services 128 bit UUIDS
shared/gatt: Add extra check in characteristic iterator
shared/gatt: Add included service iterator
shared/gatt: Remove not needed function parameter
shared/gatt: Add function bt_gatt_result_included_count()
shared/gatt: Distinguish Primary from Secondary services
tools/btgatt-client: Print type of service
shared/gatt: Discover secondary services
shared/gatt: Discover included services
shared/gatt: Add gatt-client include service iterator
tools/btgatt-client: Print found include services
shared/gatt: Fix searching descriptors
src/shared/gatt-client.c | 259 ++++++++++++++++++++++++++--
src/shared/gatt-client.h | 18 ++
src/shared/gatt-helpers.c | 418 +++++++++++++++++++++++++++++++++++++++++++---
src/shared/gatt-helpers.h | 10 +-
tools/btgatt-client.c | 17 +-
5 files changed, 686 insertions(+), 36 deletions(-)
--
1.9.3
It will allow user to take value, handle, start and end handle
of included service.
---
src/shared/gatt-client.c | 30 ++++++++++++++++++++++++++++++
src/shared/gatt-client.h | 10 ++++++++++
2 files changed, 40 insertions(+)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 80d7a1a..679242c 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -1673,6 +1673,36 @@ bool bt_gatt_characteristic_iter_next(struct bt_gatt_characteristic_iter *iter,
return true;
}
+bool bt_gatt_include_service_iter_init(struct bt_gatt_incl_service_iter *iter,
+ const bt_gatt_service_t *service)
+{
+ if (!iter || !service)
+ return false;
+
+ memset(iter, 0, sizeof(*iter));
+ iter->service = (struct service_list *) service;
+
+ return true;
+}
+
+bool bt_gatt_include_service_iter_next(struct bt_gatt_incl_service_iter *iter,
+ const bt_gatt_included_service_t **incl)
+{
+ struct service_list *service;
+
+ if (!iter || !incl)
+ return false;
+
+ service = iter->service;
+
+ if (iter->pos >= service->num_includes)
+ return false;
+
+ *incl = &service->includes[iter->pos++];
+
+ return true;
+}
+
struct read_op {
bt_gatt_client_read_callback_t callback;
void *user_data;
diff --git a/src/shared/gatt-client.h b/src/shared/gatt-client.h
index 05b4838..bf4e7bb 100644
--- a/src/shared/gatt-client.h
+++ b/src/shared/gatt-client.h
@@ -113,6 +113,11 @@ struct bt_gatt_characteristic_iter {
size_t pos;
};
+struct bt_gatt_incl_service_iter {
+ void *service;
+ size_t pos;
+};
+
bool bt_gatt_service_iter_init(struct bt_gatt_service_iter *iter,
struct bt_gatt_client *client);
bool bt_gatt_service_iter_next(struct bt_gatt_service_iter *iter,
@@ -129,6 +134,11 @@ bool bt_gatt_characteristic_iter_init(struct bt_gatt_characteristic_iter *iter,
bool bt_gatt_characteristic_iter_next(struct bt_gatt_characteristic_iter *iter,
const bt_gatt_characteristic_t **chrc);
+bool bt_gatt_include_service_iter_init(struct bt_gatt_incl_service_iter *iter,
+ const bt_gatt_service_t *service);
+bool bt_gatt_include_service_iter_next(struct bt_gatt_incl_service_iter *iter,
+ const bt_gatt_included_service_t **inc);
+
typedef void (*bt_gatt_client_read_callback_t)(bool success, uint8_t att_ecode,
const uint8_t *value, uint16_t length,
void *user_data);
--
1.9.3
Descriptor discovery range started from characteristic value handle + 1
and end with characteristic end handle. If characteristic value handle
is 0xffff, then discovery range was set to 0x0000-0xffff.
Found during PTS test case TC_GAD_CL_BV_03_C.
---
src/shared/gatt-client.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 679242c..045f9f9 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -714,8 +714,8 @@ static void discover_chrcs_cb(bool success, uint8_t att_ecode,
for (i = 0; i < chrc_count; i++) {
op->cur_chrc_index = i;
op->cur_chrc = chrcs + i;
- desc_start = chrcs[i].chrc_external.value_handle + 1;
- if (desc_start > chrcs[i].chrc_external.end_handle)
+ desc_start = chrcs[i].chrc_external.value_handle;
+ if (desc_start++ == chrcs[i].chrc_external.end_handle)
continue;
if (bt_gatt_discover_descriptors(client->att, desc_start,
--
1.9.3
---
src/shared/gatt-client.c | 114 +++++++++++++++++++++++++++++++++++++++++++++--
src/shared/gatt-client.h | 7 +++
2 files changed, 117 insertions(+), 4 deletions(-)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 9a0ec35..80d7a1a 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -69,6 +69,8 @@ struct service_list {
bt_gatt_service_t service;
struct chrc_data *chrcs;
size_t num_chrcs;
+ bt_gatt_included_service_t *includes;
+ size_t num_includes;
struct service_list *next;
};
@@ -253,6 +255,14 @@ static void service_destroy_characteristics(struct service_list *service)
free(service->chrcs);
}
+static void service_destroy_includes(struct service_list *service)
+{
+ free(service->includes);
+
+ service->includes = NULL;
+ service->num_includes = 0;
+}
+
static void service_list_clear(struct service_list **head,
struct service_list **tail)
{
@@ -265,6 +275,7 @@ static void service_list_clear(struct service_list **head,
while (l) {
service_destroy_characteristics(l);
+ service_destroy_includes(l);
tmp = l;
l = tmp->next;
free(tmp);
@@ -293,6 +304,7 @@ static void service_list_clear_range(struct service_list **head,
}
service_destroy_characteristics(cur);
+ service_destroy_includes(cur);
if (!prev)
*head = cur->next;
@@ -428,6 +440,99 @@ static int uuid_cmp(const uint8_t uuid128[16], uint16_t uuid16)
return memcmp(uuid128, rhs_uuid, sizeof(rhs_uuid));
}
+static void discover_incl_cb(bool success, uint8_t att_ecode,
+ struct bt_gatt_result *result,
+ void *user_data)
+{
+ struct discovery_op *op = user_data;
+ struct bt_gatt_client *client = op->client;
+ struct bt_gatt_iter iter;
+ char uuid_str[MAX_LEN_UUID_STR];
+ bt_gatt_included_service_t *includes;
+ unsigned int includes_count, i;
+
+ if (!success) {
+ if (att_ecode == BT_ATT_ERROR_ATTRIBUTE_NOT_FOUND) {
+ success = true;
+ goto next;
+ }
+
+ goto done;
+ }
+
+ if (!result || !bt_gatt_iter_init(&iter, result)) {
+ success = false;
+ goto done;
+ }
+
+ includes_count = bt_gatt_result_included_count(result);
+ if (includes_count == 0) {
+ success = false;
+ goto done;
+ }
+
+ includes = new0(bt_gatt_included_service_t, includes_count);
+ if (!includes) {
+ success = false;
+ goto done;
+ }
+
+ util_debug(client->debug_callback, client->debug_data,
+ "Included services found: %u",
+ includes_count);
+
+ i = 0;
+ while (bt_gatt_iter_next_included_service(&iter, &includes[i].handle,
+ &includes[i].start_handle,
+ &includes[i].end_handle,
+ includes[i].uuid)) {
+ uuid_to_string(includes[i].uuid, uuid_str);
+ util_debug(client->debug_callback, client->debug_data,
+ "handle: 0x%04x, start: 0x%04x, end: 0x%04x,"
+ "uuid: %s", includes[i].handle,
+ includes[i].start_handle,
+ includes[i].end_handle, uuid_str);
+ i++;
+ }
+
+ op->cur_service->includes = includes;
+ op->cur_service->num_includes = includes_count;
+
+next:
+ if (!op->cur_service->next) {
+ op->cur_service = op->result_head;
+ if (bt_gatt_discover_characteristics(client->att,
+ op->cur_service->service.start_handle,
+ op->cur_service->service.end_handle,
+ discover_chrcs_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
+ return;
+
+ util_debug(client->debug_callback, client->debug_data,
+ "Failed to start characteristic discovery");
+ discovery_op_unref(op);
+ success = false;
+ goto done;
+ }
+
+ op->cur_service = op->cur_service->next;
+ if (bt_gatt_discover_included_services(client->att,
+ op->cur_service->service.start_handle,
+ op->cur_service->service.end_handle,
+ discover_incl_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
+ return;
+ util_debug(client->debug_callback, client->debug_data,
+ "Failed to start included discovery");
+ discovery_op_unref(op);
+ success = false;
+
+done:
+ op->complete_func(op, success, att_ecode);
+}
+
static void discover_descs_cb(bool success, uint8_t att_ecode,
struct bt_gatt_result *result,
void *user_data)
@@ -532,6 +637,7 @@ done:
op->complete_func(op, success, att_ecode);
}
+
static void discover_chrcs_cb(bool success, uint8_t att_ecode,
struct bt_gatt_result *result,
void *user_data)
@@ -702,18 +808,18 @@ static void discover_secondary_cb(bool success, uint8_t att_ecode,
}
next:
- /* Sequentially discover the characteristics of all services */
+ /* Sequentially discover included services */
op->cur_service = op->result_head;
- if (bt_gatt_discover_characteristics(client->att,
+ if (bt_gatt_discover_included_services(client->att,
op->cur_service->service.start_handle,
op->cur_service->service.end_handle,
- discover_chrcs_cb,
+ discover_incl_cb,
discovery_op_ref(op),
discovery_op_unref))
return;
util_debug(client->debug_callback, client->debug_data,
- "Failed to start characteristic discovery");
+ "Failed to start included services discovery");
discovery_op_unref(op);
success = false;
diff --git a/src/shared/gatt-client.h b/src/shared/gatt-client.h
index 22d4dc0..05b4838 100644
--- a/src/shared/gatt-client.h
+++ b/src/shared/gatt-client.h
@@ -96,6 +96,13 @@ typedef struct {
size_t num_descs;
} bt_gatt_characteristic_t;
+typedef struct {
+ uint16_t handle;
+ uint16_t start_handle;
+ uint16_t end_handle;
+ uint8_t uuid[BT_GATT_UUID_SIZE];
+} bt_gatt_included_service_t;
+
struct bt_gatt_service_iter {
struct bt_gatt_client *client;
void *ptr;
--
1.9.3
Add searching of secondary services in gatt-client.
---
src/shared/gatt-client.c | 116 +++++++++++++++++++++++++++++++++++++++++------
1 file changed, 103 insertions(+), 13 deletions(-)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 724fde2..9a0ec35 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -200,23 +200,36 @@ static void mark_notify_data_invalid_if_in_range(void *data, void *user_data)
notify_data->invalid = true;
}
-static bool service_list_add_service(struct service_list **head,
- struct service_list **tail,
- bool primary, uint16_t start,
- uint16_t end,
+static struct service_list *new_service_list(uint16_t start, uint16_t end,
+ bool primary,
uint8_t uuid[BT_GATT_UUID_SIZE])
{
struct service_list *list;
list = new0(struct service_list, 1);
if (!list)
- return false;
+ return NULL;
list->service.primary = primary;
list->service.start_handle = start;
list->service.end_handle = end;
memcpy(list->service.uuid, uuid, UUID_BYTES);
+ return list;
+}
+
+static bool service_list_add_service(struct service_list **head,
+ struct service_list **tail,
+ bool primary, uint16_t start,
+ uint16_t end,
+ uint8_t uuid[BT_GATT_UUID_SIZE])
+{
+ struct service_list *list;
+
+ list = new_service_list(start, end, primary, uuid);
+ if (!list)
+ return false;
+
if (!(*head))
*head = *tail = list;
else {
@@ -364,6 +377,8 @@ struct discovery_op {
struct bt_gatt_client *client;
struct service_list *result_head, *result_tail, *cur_service;
struct chrc_data *cur_chrc;
+ uint16_t start;
+ uint16_t end;
int cur_chrc_index;
int ref_count;
void (*complete_func)(struct discovery_op *op, bool success,
@@ -634,6 +649,78 @@ done:
op->complete_func(op, success, att_ecode);
}
+static void discover_secondary_cb(bool success, uint8_t att_ecode,
+ struct bt_gatt_result *result,
+ void *user_data)
+{
+ struct discovery_op *op = user_data;
+ struct bt_gatt_client *client = op->client;
+ struct bt_gatt_iter iter;
+ uint16_t start, end;
+ uint8_t uuid[BT_GATT_UUID_SIZE];
+ char uuid_str[MAX_LEN_UUID_STR];
+ struct service_list *service;
+
+ if (!success) {
+ util_debug(client->debug_callback, client->debug_data,
+ "Secondary service discovery failed."
+ " ATT ECODE: 0x%02x", att_ecode);
+ if (att_ecode == BT_ATT_ERROR_ATTRIBUTE_NOT_FOUND) {
+ success = true;
+ goto next;
+ }
+
+ goto done;
+ }
+
+ if (!result || !bt_gatt_iter_init(&iter, result)) {
+ success = false;
+ goto done;
+ }
+
+ util_debug(client->debug_callback, client->debug_data,
+ "Secondary services found: %u",
+ bt_gatt_result_service_count(result));
+
+ while (bt_gatt_iter_next_service(&iter, &start, &end, uuid)) {
+ uuid_to_string(uuid, uuid_str);
+ util_debug(client->debug_callback, client->debug_data,
+ "start: 0x%04x, end: 0x%04x, uuid: %s",
+ start, end, uuid_str);
+
+ /* Store the service */
+ service = new_service_list(start, end, false, uuid);
+ if (!service) {
+ util_debug(client->debug_callback, client->debug_data,
+ "Failed to create service");
+ success = false;
+ goto done;
+ }
+
+ service_list_insert_services(&op->result_head, &op->result_tail,
+ service, service);
+ }
+
+next:
+ /* Sequentially discover the characteristics of all services */
+ op->cur_service = op->result_head;
+ if (bt_gatt_discover_characteristics(client->att,
+ op->cur_service->service.start_handle,
+ op->cur_service->service.end_handle,
+ discover_chrcs_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
+ return;
+
+ util_debug(client->debug_callback, client->debug_data,
+ "Failed to start characteristic discovery");
+ discovery_op_unref(op);
+ success = false;
+
+done:
+ op->complete_func(op, success, att_ecode);
+}
+
static void discover_primary_cb(bool success, uint8_t att_ecode,
struct bt_gatt_result *result,
void *user_data)
@@ -686,18 +773,17 @@ static void discover_primary_cb(bool success, uint8_t att_ecode,
if (!op->result_head)
goto done;
- /* Sequentially discover the characteristics of all services */
+ /* Discover secondary services */
op->cur_service = op->result_head;
- if (bt_gatt_discover_characteristics(client->att,
- op->cur_service->service.start_handle,
- op->cur_service->service.end_handle,
- discover_chrcs_cb,
- discovery_op_ref(op),
- discovery_op_unref))
+ if (bt_gatt_discover_secondary_services(client->att, NULL,
+ op->start, op->end,
+ discover_secondary_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
return;
util_debug(client->debug_callback, client->debug_data,
- "Failed to start characteristic discovery");
+ "Failed to start secondary service discovery");
discovery_op_unref(op);
success = false;
@@ -870,6 +956,8 @@ static void process_service_changed(struct bt_gatt_client *client,
op->client = client;
op->complete_func = service_changed_complete;
+ op->start = start_handle;
+ op->end = end_handle;
if (!bt_gatt_discover_primary_services(client->att, NULL,
start_handle, end_handle,
@@ -1002,6 +1090,8 @@ static bool gatt_client_init(struct bt_gatt_client *client, uint16_t mtu)
op->client = client;
op->complete_func = init_complete;
+ op->start = 0x0001;
+ op->end = 0xffff;
/* Configure the MTU */
if (!bt_gatt_exchange_mtu(client->att, MAX(BT_ATT_DEFAULT_LE_MTU, mtu),
--
1.9.3
---
tools/btgatt-client.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index 5c692ff..5465d53 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
@@ -174,7 +174,9 @@ static void print_uuid(const uint8_t uuid[16])
static void print_service(const bt_gatt_service_t *service)
{
struct bt_gatt_characteristic_iter iter;
+ struct bt_gatt_incl_service_iter include_iter;
const bt_gatt_characteristic_t *chrc;
+ const bt_gatt_included_service_t *incl;
size_t i;
if (!bt_gatt_characteristic_iter_init(&iter, service)) {
@@ -182,12 +184,24 @@ static void print_service(const bt_gatt_service_t *service)
return;
}
+ if (!bt_gatt_include_service_iter_init(&include_iter, service)) {
+ PRLOG("Failed to initialize include service iterator\n");
+ return;
+ }
printf(COLOR_RED "service %s" COLOR_OFF " - start: 0x%04x, "
"end: 0x%04x, uuid: ",
service->primary ? "primary" : "second.",
service->start_handle, service->end_handle);
print_uuid(service->uuid);
+ while (bt_gatt_include_service_iter_next(&include_iter, &incl)) {
+ printf("\t " COLOR_GREEN "include" COLOR_OFF " - handle: "
+ "0x%04x, - start: 0x%04x, end: 0x%04x,"
+ "uuid: ", incl->handle,
+ incl->start_handle, incl->end_handle);
+ print_uuid(incl->uuid);
+ }
+
while (bt_gatt_characteristic_iter_next(&iter, &chrc)) {
printf("\t " COLOR_YELLOW "charac" COLOR_OFF
" - start: 0x%04x, end: 0x%04x, "
--
1.9.3
---
tools/btgatt-client.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index d900e08..5c692ff 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
@@ -182,8 +182,9 @@ static void print_service(const bt_gatt_service_t *service)
return;
}
- printf(COLOR_RED "service" COLOR_OFF " - start: 0x%04x, "
+ printf(COLOR_RED "service %s" COLOR_OFF " - start: 0x%04x, "
"end: 0x%04x, uuid: ",
+ service->primary ? "primary" : "second.",
service->start_handle, service->end_handle);
print_uuid(service->uuid);
--
1.9.3
According to SPEC 4.1 4.5.1 "Find Included Services" there is no need
to pass UUID to discover_included_services() function.
---
src/shared/gatt-helpers.c | 1 -
src/shared/gatt-helpers.h | 1 -
2 files changed, 2 deletions(-)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index fd8d06c..48e7379 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -1002,7 +1002,6 @@ done:
bool bt_gatt_discover_included_services(struct bt_att *att,
uint16_t start, uint16_t end,
- bt_uuid_t *uuid,
bt_gatt_discovery_callback_t callback,
void *user_data,
bt_gatt_destroy_func_t destroy)
diff --git a/src/shared/gatt-helpers.h b/src/shared/gatt-helpers.h
index 8c434c1..f2c7ec5 100644
--- a/src/shared/gatt-helpers.h
+++ b/src/shared/gatt-helpers.h
@@ -82,7 +82,6 @@ bool bt_gatt_discover_secondary_services(struct bt_att *att, bt_uuid_t *uuid,
bt_gatt_destroy_func_t destroy);
bool bt_gatt_discover_included_services(struct bt_att *att,
uint16_t start, uint16_t end,
- bt_uuid_t *uuid,
bt_gatt_discovery_callback_t callback,
void *user_data,
bt_gatt_destroy_func_t destroy);
--
1.9.3
It will return number of included services in result.
---
src/shared/gatt-helpers.c | 21 +++++++++++++++++++++
src/shared/gatt-helpers.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index 48e7379..92d0696 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -140,6 +140,27 @@ unsigned int bt_gatt_result_descriptor_count(struct bt_gatt_result *result)
return result_element_count(result);
}
+unsigned int bt_gatt_result_included_count(struct bt_gatt_result *result)
+{
+ struct bt_gatt_result *cur;
+ unsigned int count = 0;
+
+ if (!result)
+ return 0;
+
+ if (result->opcode != BT_ATT_OP_READ_BY_TYPE_RSP)
+ return 0;
+
+ if (result->data_len != 6 && result->data_len != 8)
+ return 0;
+
+ for (cur = result; cur; cur = cur->next)
+ if (cur->opcode == BT_ATT_OP_READ_BY_TYPE_RSP)
+ count += cur->pdu_len / cur->data_len;
+
+ return count;
+}
+
bool bt_gatt_iter_init(struct bt_gatt_iter *iter, struct bt_gatt_result *result)
{
if (!iter || !result)
diff --git a/src/shared/gatt-helpers.h b/src/shared/gatt-helpers.h
index f2c7ec5..07c145d 100644
--- a/src/shared/gatt-helpers.h
+++ b/src/shared/gatt-helpers.h
@@ -38,6 +38,7 @@ struct bt_gatt_iter {
unsigned int bt_gatt_result_service_count(struct bt_gatt_result *result);
unsigned int bt_gatt_result_characteristic_count(struct bt_gatt_result *result);
unsigned int bt_gatt_result_descriptor_count(struct bt_gatt_result *result);
+unsigned int bt_gatt_result_included_count(struct bt_gatt_result *result);
bool bt_gatt_iter_init(struct bt_gatt_iter *iter, struct bt_gatt_result *result);
bool bt_gatt_iter_next_service(struct bt_gatt_iter *iter,
--
1.9.3
It will fetch included services from result.
---
src/shared/gatt-helpers.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
src/shared/gatt-helpers.h | 3 +++
2 files changed, 61 insertions(+)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index 58104d9..fd8d06c 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -186,6 +186,64 @@ struct discovery_op {
bt_gatt_destroy_func_t destroy;
};
+bool bt_gatt_iter_next_included_service(struct bt_gatt_iter *iter,
+ uint16_t *handle, uint16_t *start_handle,
+ uint16_t *end_handle, uint8_t uuid[16])
+{
+ struct bt_gatt_result *read_result;
+ const void *pdu_ptr;
+ int i = 0;
+
+ if (!iter || !iter->result || !handle || !start_handle || !end_handle
+ || !uuid)
+ return false;
+
+ if (iter->result->opcode != BT_ATT_OP_READ_BY_TYPE_RSP)
+ return false;
+
+ if (iter->result->data_len != 8 && iter->result->data_len != 6)
+ return false;
+
+ pdu_ptr = iter->result->pdu + iter->pos;
+
+ if (iter->result->data_len == 8) {
+ *handle = get_le16(pdu_ptr);
+ *start_handle = get_le16(pdu_ptr + 2);
+ *end_handle = get_le16(pdu_ptr + 4);
+ convert_uuid_le(pdu_ptr + 6, 2, uuid);
+
+ iter->pos += iter->result->data_len;
+
+ if (iter->pos == iter->result->pdu_len) {
+ iter->result = iter->result->next;
+ iter->pos = 0;
+ }
+
+ return true;
+ }
+
+ *handle = get_le16(pdu_ptr);
+ *start_handle = get_le16(pdu_ptr + 2);
+ *end_handle = get_le16(pdu_ptr + 4);
+ read_result = iter->result;
+
+ do {
+ read_result = read_result->next;
+ } while (read_result && i++ < (iter->pos / iter->result->data_len));
+
+ if (!read_result)
+ return false;
+
+ convert_uuid_le(read_result->pdu, read_result->data_len, uuid);
+ iter->pos += iter->result->data_len;
+ if (iter->pos == iter->result->pdu_len) {
+ iter->result = read_result->next;
+ iter->pos = 0;
+ }
+
+ return true;
+}
+
bool bt_gatt_iter_next_service(struct bt_gatt_iter *iter,
uint16_t *start_handle, uint16_t *end_handle,
uint8_t uuid[16])
diff --git a/src/shared/gatt-helpers.h b/src/shared/gatt-helpers.h
index 8a25dea..8c434c1 100644
--- a/src/shared/gatt-helpers.h
+++ b/src/shared/gatt-helpers.h
@@ -49,6 +49,9 @@ bool bt_gatt_iter_next_characteristic(struct bt_gatt_iter *iter,
uint8_t uuid[16]);
bool bt_gatt_iter_next_descriptor(struct bt_gatt_iter *iter, uint16_t *handle,
uint8_t uuid[16]);
+bool bt_gatt_iter_next_included_service(struct bt_gatt_iter *iter,
+ uint16_t *handle, uint16_t *start_handle,
+ uint16_t *end_handle, uint8_t uuid[16]);
typedef void (*bt_gatt_destroy_func_t)(void *user_data);
--
1.9.3
Add flag primary to distinguish service as primary or secondary.
---
src/shared/gatt-client.c | 7 +++++--
src/shared/gatt-client.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 03d722f..724fde2 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -202,7 +202,8 @@ static void mark_notify_data_invalid_if_in_range(void *data, void *user_data)
static bool service_list_add_service(struct service_list **head,
struct service_list **tail,
- uint16_t start, uint16_t end,
+ bool primary, uint16_t start,
+ uint16_t end,
uint8_t uuid[BT_GATT_UUID_SIZE])
{
struct service_list *list;
@@ -211,6 +212,7 @@ static bool service_list_add_service(struct service_list **head,
if (!list)
return false;
+ list->service.primary = primary;
list->service.start_handle = start;
list->service.end_handle = end;
memcpy(list->service.uuid, uuid, UUID_BYTES);
@@ -668,7 +670,8 @@ static void discover_primary_cb(bool success, uint8_t att_ecode,
/* Store the service */
if (!service_list_add_service(&op->result_head,
- &op->result_tail, start, end, uuid)) {
+ &op->result_tail, true, start, end,
+ uuid)) {
util_debug(client->debug_callback, client->debug_data,
"Failed to store service");
success = false;
diff --git a/src/shared/gatt-client.h b/src/shared/gatt-client.h
index 6807f6b..22d4dc0 100644
--- a/src/shared/gatt-client.h
+++ b/src/shared/gatt-client.h
@@ -75,6 +75,7 @@ bool bt_gatt_client_set_debug(struct bt_gatt_client *client,
bt_gatt_client_destroy_func_t destroy);
typedef struct {
+ bool primary;
uint16_t start_handle;
uint16_t end_handle;
uint8_t uuid[BT_GATT_UUID_SIZE];
--
1.9.3
Avoid incorrect reading of included service discovery results.
---
src/shared/gatt-helpers.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index c18f738..58104d9 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -123,6 +123,9 @@ unsigned int bt_gatt_result_characteristic_count(struct bt_gatt_result *result)
if (result->opcode != BT_ATT_OP_READ_BY_TYPE_RSP)
return 0;
+ if (result->data_len != 21 && result->data_len != 7)
+ return 0;
+
return result_element_count(result);
}
@@ -239,6 +242,9 @@ bool bt_gatt_iter_next_characteristic(struct bt_gatt_iter *iter,
if (iter->result->opcode != BT_ATT_OP_READ_BY_TYPE_RSP)
return false;
+ if (iter->result->data_len != 21 && iter->result->data_len != 7)
+ return false;
+
op = iter->result->op;
pdu_ptr = iter->result->pdu + iter->pos;
--
1.9.3
If included services has 128 bit UUID, it won't be returned in
READ_BY_TYPE_RSP. To get UUID READ_REQUEST is used.
This procedure is described in CORE SPEC 4.5.1 "Find Included Services".
---
src/shared/gatt-helpers.c | 170 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 169 insertions(+), 1 deletion(-)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index dcb2a2f..c18f738 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -692,6 +692,160 @@ bool bt_gatt_discover_secondary_services(struct bt_att *att, bt_uuid_t *uuid,
destroy, false);
}
+struct read_incl_data {
+ struct discovery_op *op;
+ struct bt_gatt_result *result;
+ int pos;
+ int ref_count;
+};
+
+static struct read_incl_data *new_read_included(struct bt_gatt_result *res)
+{
+ struct read_incl_data *data;
+
+ data = new0(struct read_incl_data, 1);
+ if (!data)
+ return NULL;
+
+ data->op = discovery_op_ref(res->op);
+ data->result = res;
+
+ return data;
+};
+
+static struct read_incl_data *read_included_ref(struct read_incl_data *data)
+{
+ __sync_fetch_and_add(&data->ref_count, 1);
+
+ return data;
+}
+
+static void read_included_unref(void *data)
+{
+ struct read_incl_data *read_data = data;
+
+ if (__sync_sub_and_fetch(&read_data->ref_count, 1))
+ return;
+
+ discovery_op_unref(read_data->op);
+
+ free(read_data);
+}
+
+static void discover_included_cb(uint8_t opcode, const void *pdu,
+ uint16_t length, void *user_data);
+
+static void read_included_cb(uint8_t opcode, const void *pdu,
+ uint16_t length, void *user_data)
+{
+ struct read_incl_data *data = user_data;
+ struct bt_gatt_result *final_result = NULL;
+ struct discovery_op *op = data->op;
+ struct bt_gatt_result *cur_result;
+ uint8_t att_ecode = 0;
+ uint16_t handle;
+ uint8_t read_pdu[2];
+ bool success;
+
+ if (opcode == BT_ATT_OP_ERROR_RSP) {
+ success = false;
+ att_ecode = process_error(pdu, length);
+ goto done;
+ }
+
+ if (opcode != BT_ATT_OP_READ_RSP || (!pdu && length)) {
+ success = false;
+ goto done;
+ }
+
+ if (length != 16) {
+ success = false;
+ goto done;
+ }
+ cur_result = result_create(opcode, pdu, length, length, op);
+ if (!cur_result) {
+ success = false;
+ goto done;
+ }
+
+ if (!op->result_head)
+ op->result_head = op->result_tail = cur_result;
+ else {
+ op->result_tail->next = cur_result;
+ op->result_tail = cur_result;
+ }
+
+ if (data->pos == data->result->pdu_len) {
+ uint16_t last_handle, data_len;
+ uint8_t pdu[6];
+
+ data_len = data->result->data_len;
+ last_handle = get_le16(data->result->pdu + data->pos -
+ data_len);
+ if (last_handle == op->end_handle) {
+ final_result = op->result_head;
+ success = true;
+ goto done;
+ }
+
+ put_le16(last_handle + 1, pdu);
+ put_le16(op->end_handle, pdu + 2);
+ put_le16(GATT_INCLUDE_UUID, pdu + 4);
+
+ if (bt_att_send(op->att, BT_ATT_OP_READ_BY_TYPE_REQ,
+ pdu, sizeof(pdu),
+ discover_included_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
+ return;
+
+ discovery_op_unref(op);
+ success = false;
+ goto done;
+ }
+
+ handle = get_le16(data->result->pdu + data->pos + 2);
+ put_le16(handle, read_pdu);
+
+ data->pos += data->result->data_len;
+
+ if (bt_att_send(op->att, BT_ATT_OP_READ_REQ, read_pdu, sizeof(read_pdu),
+ read_included_cb,
+ read_included_ref(data),
+ read_included_unref))
+ return;
+
+ read_included_unref(data);
+ success = false;
+
+done:
+ if (op->callback)
+ op->callback(success, att_ecode, final_result, op->user_data);
+}
+
+static void read_included(struct read_incl_data *data)
+{
+ struct discovery_op *op = data->op;
+ uint16_t handle;
+ uint8_t pdu[2];
+
+ handle = get_le16(data->result->pdu + 2);
+ put_le16(handle, pdu);
+
+ data->pos += data->result->data_len;
+
+ if (bt_att_send(op->att, BT_ATT_OP_READ_REQ, pdu, sizeof(pdu),
+ read_included_cb,
+ read_included_ref(data),
+ read_included_unref))
+ return;
+
+ read_included_unref(data);
+
+ if (op->callback)
+ op->callback(false, 0, NULL, data->op->user_data);
+}
+
static void discover_included_cb(uint8_t opcode, const void *pdu,
uint16_t length, void *user_data)
{
@@ -721,7 +875,8 @@ static void discover_included_cb(uint8_t opcode, const void *pdu,
data_length = ((uint8_t *) pdu)[0];
- if ((length - 1) % data_length || data_length != 8) {
+ if (((length - 1) % data_length) ||
+ (data_length != 8 && data_length != 6)) {
success = false;
goto done;
}
@@ -740,6 +895,19 @@ static void discover_included_cb(uint8_t opcode, const void *pdu,
op->result_tail = cur_result;
}
+ if (data_length == 6) {
+ struct read_incl_data *data;
+
+ data = new_read_included(cur_result);
+ if (!data) {
+ success = false;
+ goto done;
+ }
+
+ read_included(data);
+ return;
+ }
+
last_handle = get_le16(pdu + length - data_length);
if (last_handle != op->end_handle) {
uint8_t pdu[6];
--
1.9.3
Current implementation allow to discover included services with
16 bit UUID only.
---
src/shared/gatt-helpers.c | 108 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 106 insertions(+), 2 deletions(-)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index 4dc787f..dcb2a2f 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -692,6 +692,82 @@ bool bt_gatt_discover_secondary_services(struct bt_att *att, bt_uuid_t *uuid,
destroy, false);
}
+static void discover_included_cb(uint8_t opcode, const void *pdu,
+ uint16_t length, void *user_data)
+{
+ struct bt_gatt_result *final_result = NULL;
+ struct discovery_op *op = user_data;
+ struct bt_gatt_result *cur_result;
+ uint8_t att_ecode = 0;
+ uint16_t last_handle;
+ size_t data_length;
+ bool success;
+
+ if (opcode == BT_ATT_OP_ERROR_RSP) {
+ success = false;
+ att_ecode = process_error(pdu, length);
+
+ if (att_ecode == BT_ATT_ERROR_ATTRIBUTE_NOT_FOUND &&
+ op->result_head)
+ goto success;
+
+ goto done;
+ }
+
+ if (opcode != BT_ATT_OP_READ_BY_TYPE_RSP || !pdu || length < 6) {
+ success = false;
+ goto done;
+ }
+
+ data_length = ((uint8_t *) pdu)[0];
+
+ if ((length - 1) % data_length || data_length != 8) {
+ success = false;
+ goto done;
+ }
+
+ cur_result = result_create(opcode, pdu + 1, length - 1,
+ data_length, op);
+ if (!cur_result) {
+ success = false;
+ goto done;
+ }
+
+ if (!op->result_head)
+ op->result_head = op->result_tail = cur_result;
+ else {
+ op->result_tail->next = cur_result;
+ op->result_tail = cur_result;
+ }
+
+ last_handle = get_le16(pdu + length - data_length);
+ if (last_handle != op->end_handle) {
+ uint8_t pdu[6];
+
+ put_le16(last_handle + 1, pdu);
+ put_le16(op->end_handle, pdu + 2);
+ put_le16(GATT_INCLUDE_UUID, pdu + 4);
+
+ if (bt_att_send(op->att, BT_ATT_OP_READ_BY_TYPE_REQ,
+ pdu, sizeof(pdu),
+ discover_included_cb,
+ discovery_op_ref(op),
+ discovery_op_unref))
+ return;
+
+ discovery_op_unref(op);
+ success = false;
+ }
+
+success:
+ success = true;
+ final_result = op->result_head;
+
+done:
+ if (op->callback)
+ op->callback(success, att_ecode, final_result, op->user_data);
+}
+
bool bt_gatt_discover_included_services(struct bt_att *att,
uint16_t start, uint16_t end,
bt_uuid_t *uuid,
@@ -699,8 +775,36 @@ bool bt_gatt_discover_included_services(struct bt_att *att,
void *user_data,
bt_gatt_destroy_func_t destroy)
{
- /* TODO */
- return false;
+ struct discovery_op *op;
+ uint8_t pdu[6];
+
+ if (!att)
+ return false;
+
+ op = new0(struct discovery_op, 1);
+ if (!op)
+ return false;
+
+ op->att = att;
+ op->callback = callback;
+ op->user_data = user_data;
+ op->destroy = destroy;
+ op->end_handle = end;
+
+ put_le16(start, pdu);
+ put_le16(end, pdu + 2);
+ put_le16(GATT_INCLUDE_UUID, pdu + 4);
+
+ if (!bt_att_send(att, BT_ATT_OP_READ_BY_TYPE_REQ,
+ pdu, sizeof(pdu),
+ discover_included_cb,
+ discovery_op_ref(op),
+ discovery_op_unref)) {
+ free(op);
+ return false;
+ }
+
+ return true;
}
static void discover_chrcs_cb(uint8_t opcode, const void *pdu,
--
1.9.3
This pach implements searching Secondary Services in given range.
---
src/shared/gatt-helpers.c | 56 +++++++++++++++++++++++++++++++++--------------
src/shared/gatt-helpers.h | 5 +++++
2 files changed, 45 insertions(+), 16 deletions(-)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index 55e6992..4dc787f 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -175,6 +175,7 @@ struct discovery_op {
uint16_t end_handle;
int ref_count;
bt_uuid_t uuid;
+ uint16_t service_type;
struct bt_gatt_result *result_head;
struct bt_gatt_result *result_tail;
bt_gatt_discovery_callback_t callback;
@@ -487,7 +488,7 @@ static void read_by_grp_type_cb(uint8_t opcode, const void *pdu,
put_le16(last_end + 1, pdu);
put_le16(op->end_handle, pdu + 2);
- put_le16(GATT_PRIM_SVC_UUID, pdu + 4);
+ put_le16(op->service_type, pdu + 4);
if (bt_att_send(op->att, BT_ATT_OP_READ_BY_GRP_TYPE_REQ,
pdu, sizeof(pdu),
@@ -569,7 +570,7 @@ static void find_by_type_val_cb(uint8_t opcode, const void *pdu,
put_le16(last_end + 1, pdu);
put_le16(op->end_handle, pdu + 2);
- put_le16(GATT_PRIM_SVC_UUID, pdu + 4);
+ put_le16(op->service_type, pdu + 4);
put_uuid_le(&op->uuid, pdu + 6);
if (bt_att_send(op->att, BT_ATT_OP_FIND_BY_TYPE_VAL_REQ,
@@ -594,21 +595,12 @@ done:
op->callback(success, att_ecode, final_result, op->user_data);
}
-bool bt_gatt_discover_all_primary_services(struct bt_att *att, bt_uuid_t *uuid,
- bt_gatt_discovery_callback_t callback,
- void *user_data,
- bt_gatt_destroy_func_t destroy)
-{
- return bt_gatt_discover_primary_services(att, uuid, 0x0001, 0xffff,
- callback, user_data,
- destroy);
-}
-
-bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
+static bool discover_services(struct bt_att *att, bt_uuid_t *uuid,
uint16_t start, uint16_t end,
bt_gatt_discovery_callback_t callback,
void *user_data,
- bt_gatt_destroy_func_t destroy)
+ bt_gatt_destroy_func_t destroy,
+ bool primary)
{
struct discovery_op *op;
bool result;
@@ -625,6 +617,8 @@ bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
op->callback = callback;
op->user_data = user_data;
op->destroy = destroy;
+ /* set service uuid to primary or secondary */
+ op->service_type = primary ? GATT_PRIM_SVC_UUID : GATT_SND_SVC_UUID;
/* If UUID is NULL, then discover all primary services */
if (!uuid) {
@@ -632,7 +626,7 @@ bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
put_le16(start, pdu);
put_le16(end, pdu + 2);
- put_le16(GATT_PRIM_SVC_UUID, pdu + 4);
+ put_le16(op->service_type, pdu + 4);
result = bt_att_send(att, BT_ATT_OP_READ_BY_GRP_TYPE_REQ,
pdu, sizeof(pdu),
@@ -652,7 +646,7 @@ bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
put_le16(start, pdu);
put_le16(end, pdu + 2);
- put_le16(GATT_PRIM_SVC_UUID, pdu + 4);
+ put_le16(op->service_type, pdu + 4);
put_uuid_le(&op->uuid, pdu + 6);
result = bt_att_send(att, BT_ATT_OP_FIND_BY_TYPE_VAL_REQ,
@@ -668,6 +662,36 @@ bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
return result;
}
+bool bt_gatt_discover_all_primary_services(struct bt_att *att, bt_uuid_t *uuid,
+ bt_gatt_discovery_callback_t callback,
+ void *user_data,
+ bt_gatt_destroy_func_t destroy)
+{
+ return bt_gatt_discover_primary_services(att, uuid, 0x0001, 0xffff,
+ callback, user_data,
+ destroy);
+}
+
+bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
+ uint16_t start, uint16_t end,
+ bt_gatt_discovery_callback_t callback,
+ void *user_data,
+ bt_gatt_destroy_func_t destroy)
+{
+ return discover_services(att, uuid, start, end, callback, user_data,
+ destroy, true);
+}
+
+bool bt_gatt_discover_secondary_services(struct bt_att *att, bt_uuid_t *uuid,
+ uint16_t start, uint16_t end,
+ bt_gatt_discovery_callback_t callback,
+ void *user_data,
+ bt_gatt_destroy_func_t destroy)
+{
+ return discover_services(att, uuid, start, end, callback, user_data,
+ destroy, false);
+}
+
bool bt_gatt_discover_included_services(struct bt_att *att,
uint16_t start, uint16_t end,
bt_uuid_t *uuid,
diff --git a/src/shared/gatt-helpers.h b/src/shared/gatt-helpers.h
index f6f4b62..8a25dea 100644
--- a/src/shared/gatt-helpers.h
+++ b/src/shared/gatt-helpers.h
@@ -72,6 +72,11 @@ bool bt_gatt_discover_primary_services(struct bt_att *att, bt_uuid_t *uuid,
bt_gatt_discovery_callback_t callback,
void *user_data,
bt_gatt_destroy_func_t destroy);
+bool bt_gatt_discover_secondary_services(struct bt_att *att, bt_uuid_t *uuid,
+ uint16_t start, uint16_t end,
+ bt_gatt_discovery_callback_t callback,
+ void *user_data,
+ bt_gatt_destroy_func_t destroy);
bool bt_gatt_discover_included_services(struct bt_att *att,
uint16_t start, uint16_t end,
bt_uuid_t *uuid,
--
1.9.3