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Bluetooth: audio: pacs: Disallow changing supported contexts

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Disallow further changes of supported audio contexts characteristic is
the GATT Characteristic Notify Property is not set.

Signed-off-by: Mariusz Skamra <mariusz.skamra@codecoup.pl>
This commit is contained in:
Mariusz Skamra 2023-12-01 13:28:09 +01:00 • committed by Fabio Baltieri
commit ef362e766a
1 changed files with 47 additions and 43 deletions
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90
subsys/bluetooth/audio/pacs.c
View file

@ -41,28 +41,17 @@ LOG_MODULE_REGISTER(bt_pacs, CONFIG_BT_PACS_LOG_LEVEL);
#if defined(CONFIG_BT_PAC_SRC)
static uint32_t pacs_src_location;
static sys_slist_t src_pacs_list = SYS_SLIST_STATIC_INIT(&src_pacs_list);
static uint16_t src_supported_contexts;
#endif /* CONFIG_BT_PAC_SRC */
#if defined(CONFIG_BT_PAC_SNK)
static uint32_t pacs_snk_location;
static sys_slist_t snk_pacs_list = SYS_SLIST_STATIC_INIT(&snk_pacs_list);
static uint16_t snk_supported_contexts;
#endif /* CONFIG_BT_PAC_SNK */
#if defined(CONFIG_BT_PAC_SNK)
static uint16_t snk_available_contexts;
static uint16_t snk_supported_contexts = BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED;
#else
static uint16_t snk_available_contexts = BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
static uint16_t snk_supported_contexts = BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
#endif /* CONFIG_BT_PAC_SNK */
#if defined(CONFIG_BT_PAC_SRC)
static uint16_t src_available_contexts;
static uint16_t src_supported_contexts = BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED;
#else
static uint16_t src_available_contexts = BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
static uint16_t src_supported_contexts = BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
#endif /* CONFIG_BT_PAC_SRC */
static uint16_t snk_available_contexts = BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
enum {
FLAG_ACTIVE,
@ -212,13 +201,31 @@ static void supported_context_cfg_changed(const struct bt_gatt_attr *attr,
}
#endif /* CONFIG_BT_PACS_SUPPORTED_CONTEXT_NOTIFIABLE */
static uint16_t supported_context_get(enum bt_audio_dir dir)
{
switch (dir) {
#if defined(CONFIG_BT_PAC_SNK)
case BT_AUDIO_DIR_SINK:
return snk_supported_contexts | BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED;
#endif /* CONFIG_BT_PAC_SNK */
#if defined(CONFIG_BT_PAC_SRC)
case BT_AUDIO_DIR_SOURCE:
return src_supported_contexts | BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED;
#endif /* CONFIG_BT_PAC_SRC */
default:
break;
}
return BT_AUDIO_CONTEXT_TYPE_PROHIBITED;
}
static ssize_t supported_context_read(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
struct bt_pacs_context context = {
.snk = sys_cpu_to_le16(snk_supported_contexts),
.src = sys_cpu_to_le16(src_supported_contexts),
.snk = sys_cpu_to_le16(supported_context_get(BT_AUDIO_DIR_SINK)),
.src = sys_cpu_to_le16(supported_context_get(BT_AUDIO_DIR_SOURCE)),
};
LOG_DBG("conn %p attr %p buf %p len %u offset %u", conn, attr, buf, len, offset);
@ -321,22 +328,11 @@ static inline int set_snk_available_contexts(uint16_t contexts)
return set_available_contexts(contexts, &snk_available_contexts,
snk_supported_contexts);
}
static inline int set_snk_supported_contexts(uint16_t contexts)
{
return set_supported_contexts(contexts, &snk_supported_contexts,
&snk_available_contexts);
}
#else
static inline int set_snk_available_contexts(uint16_t contexts)
{
return -ENOTSUP;
}
static inline int set_snk_supported_contexts(uint16_t contexts)
{
return -ENOTSUP;
}
#endif /* CONFIG_BT_PAC_SNK */
#if defined(CONFIG_BT_PAC_SNK_LOC)
@ -448,22 +444,11 @@ static inline int set_src_available_contexts(uint16_t contexts)
return set_available_contexts(contexts, &src_available_contexts,
src_supported_contexts);
}
static inline int set_src_supported_contexts(uint16_t contexts)
{
return set_supported_contexts(contexts, &src_supported_contexts,
&src_available_contexts);
}
#else
static inline int set_src_available_contexts(uint16_t contexts)
{
return -ENOTSUP;
}
static inline int set_src_supported_contexts(uint16_t contexts)
{
return -ENOTSUP;
}
#endif /* CONFIG_BT_PAC_SRC */
#if defined(CONFIG_BT_PAC_SRC_LOC)
@ -749,8 +734,8 @@ static int available_contexts_notify(struct bt_conn *conn)
static int supported_contexts_notify(struct bt_conn *conn)
{
struct bt_pacs_context context = {
.snk = sys_cpu_to_le16(snk_supported_contexts),
.src = sys_cpu_to_le16(src_supported_contexts),
.snk = sys_cpu_to_le16(supported_context_get(BT_AUDIO_DIR_SINK)),
.src = sys_cpu_to_le16(supported_context_get(BT_AUDIO_DIR_SOURCE)),
};
int err;
@ -1128,14 +1113,33 @@ int bt_pacs_set_available_contexts(enum bt_audio_dir dir, enum bt_audio_context
int bt_pacs_set_supported_contexts(enum bt_audio_dir dir, enum bt_audio_context contexts)
{
uint16_t *supported_contexts = NULL;
uint16_t *available_contexts = NULL;
switch (dir) {
case BT_AUDIO_DIR_SINK:
return set_snk_supported_contexts(contexts);
#if defined(CONFIG_BT_PAC_SNK)
supported_contexts = &snk_supported_contexts;
available_contexts = &snk_available_contexts;
break;
#endif /* CONFIG_BT_PAC_SNK */
return -ENOTSUP;
case BT_AUDIO_DIR_SOURCE:
return set_src_supported_contexts(contexts);
#if defined(CONFIG_BT_PAC_SRC)
supported_contexts = &src_supported_contexts;
available_contexts = &src_available_contexts;
break;
#endif /* CONFIG_BT_PAC_SRC */
return -ENOTSUP;
default:
return -EINVAL;
}
return -EINVAL;
if (IS_ENABLED(CONFIG_BT_PACS_SUPPORTED_CONTEXT_NOTIFIABLE) || *supported_contexts == 0) {
return set_supported_contexts(contexts, supported_contexts, available_contexts);
}
return -EALREADY;
}
enum bt_audio_context bt_pacs_get_available_contexts(enum bt_audio_dir dir)