Added initial BASS code - added support for the Broadcast
Receive State characteristic and for the Set Broadcast_Code
operation from the Broadcast Audio Scan Control Point
characteristic.
The BASS implementation exposes HCI event callbacks that
enable the BASS server to autonomously synchronize
to BIGs.
---
src/shared/att-types.h | 1 +
src/shared/bap.c | 1065 ++++++++++++++++++++++++++++++++++++++++
src/shared/bap.h | 25 +
src/shared/bass.h | 43 ++
4 files changed, 1134 insertions(+)
create mode 100644 src/shared/bass.h
diff --git a/src/shared/att-types.h b/src/shared/att-types.h
index a08b24155..35bf41118 100644
--- a/src/shared/att-types.h
+++ b/src/shared/att-types.h
@@ -104,6 +104,7 @@ struct bt_att_pdu_error_rsp {
* 0xE0-0xFC are reserved for future use. The remaining 3 are defined as the
* following:
*/
+#define BT_ERROR_WRITE_REQUEST_REJECTED 0xfc
#define BT_ERROR_CCC_IMPROPERLY_CONFIGURED 0xfd
#define BT_ERROR_ALREADY_IN_PROGRESS 0xfe
#define BT_ERROR_OUT_OF_RANGE 0xff
diff --git a/src/shared/bap.c b/src/shared/bap.c
index db7def799..86374967f 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -17,6 +17,8 @@
#include "lib/bluetooth.h"
#include "lib/uuid.h"
+#include "lib/hci.h"
+#include "lib/hci_lib.h"
#include "src/shared/io.h"
#include "src/shared/queue.h"
@@ -28,6 +30,8 @@
#include "src/shared/gatt-client.h"
#include "src/shared/bap.h"
#include "src/shared/ascs.h"
+#include "src/shared/bass.h"
+#include "src/shared/ad.h"
/* Maximum number of ASE(s) */
#define NUM_SINKS 2
@@ -108,13 +112,55 @@ struct bt_ascs {
struct gatt_db_attribute *ase_cp_ccc;
};
+/*
+ * BASS subgroup field of the Broadcast
+ * Receive State characteristic
+ */
+struct bt_bass_subgroup_data {
+ uint32_t bis_sync;
+ uint8_t meta_len;
+ uint8_t *meta;
+} __packed;
+
+/* BASS Broadcast Source structure */
+struct bt_bcst_source {
+ struct gatt_db_attribute *attr;
+ uint8_t id;
+ uint8_t addr_type;
+ uint8_t addr[6];
+ uint8_t sid;
+ uint8_t bid[BT_BAP_BROADCAST_ID_SIZE];
+ uint8_t sync_state;
+ uint8_t encryption;
+ uint8_t bad_code[BT_BAP_BROADCAST_CODE_SIZE];
+ uint8_t num_subgroups;
+ struct bt_bass_subgroup_data *subgroup_data;
+} __packed;
+
+/* Broadcast Receive State characteristic structure */
+struct bt_bcst_recv_state {
+ struct bt_bass *bass;
+ struct gatt_db_attribute *attr;
+ struct gatt_db_attribute *ccc;
+};
+
+/* BASS instance structure */
+struct bt_bass {
+ struct bt_bap_db *bdb;
+ struct gatt_db_attribute *service;
+ struct gatt_db_attribute *broadcast_audio_scan_cp;
+ struct bt_bcst_recv_state *bcst_recv_states[NUM_BCST_RECV_STATES];
+};
+
struct bt_bap_db {
struct gatt_db *db;
struct bt_pacs *pacs;
struct bt_ascs *ascs;
+ struct bt_bass *bass;
struct queue *sinks;
struct queue *sources;
struct queue *endpoints;
+ struct queue *bass_bcst_sources;
};
struct bt_bap_req {
@@ -255,6 +301,15 @@ static struct queue *bap_db;
static struct queue *bap_cbs;
static struct queue *sessions;
+static int hci_fd = -1;
+
+static struct bt_hci_cmd_le_big_create_sync *big_sync_cmd;
+static int big_sync_cmd_len;
+
+static struct bt_hci_le_pa_report *pa_report;
+
+static uint8_t next_available_source_id;
+
static bool bap_db_match(const void *data, const void *match_data)
{
const struct bt_bap_db *bdb = data;
@@ -2170,6 +2225,643 @@ static struct bt_ascs *ascs_new(struct gatt_db *db)
return ascs;
}
+static int bass_build_bcst_source_from_notif(struct bt_bcst_source *bcst_source,
+ const uint8_t *value)
+{
+ struct bt_bass_subgroup_data *subgroup_data;
+
+ if (!bcst_source || !value)
+ return -1;
+
+ bcst_source->id = *value;
+ value++;
+
+ bcst_source->addr_type = *value;
+ value++;
+
+ memcpy(bcst_source->addr, value, 6);
+ value += 6;
+
+ bcst_source->sid = *value;
+ value++;
+
+ memcpy(bcst_source->bid, value, BT_BAP_BROADCAST_ID_SIZE);
+ value += BT_BAP_BROADCAST_ID_SIZE;
+
+ bcst_source->sync_state = *value;
+ value++;
+
+ bcst_source->encryption = *value;
+ value++;
+
+ if (bcst_source->encryption == BT_BASS_BIG_ENC_STATE_BAD_CODE) {
+ memcpy(bcst_source->bad_code, value, BT_BAP_BROADCAST_CODE_SIZE);
+ value += BT_BAP_BROADCAST_CODE_SIZE;
+ } else {
+ memset(bcst_source->bad_code, 0, BT_BAP_BROADCAST_CODE_SIZE);
+ }
+
+ bcst_source->num_subgroups = *value;
+ value++;
+
+ free(bcst_source->subgroup_data);
+ bcst_source->subgroup_data = malloc(bcst_source->num_subgroups *
+ sizeof(struct bt_bass_subgroup_data));
+
+ if (!bcst_source->subgroup_data)
+ return -1;
+
+ for (int i = 0; i < bcst_source->num_subgroups; i++) {
+ subgroup_data = &bcst_source->subgroup_data[i];
+
+ memcpy(&subgroup_data->bis_sync, value, sizeof(uint32_t));
+ value += sizeof(uint32_t);
+
+ subgroup_data->meta_len = *value;
+ value++;
+
+ free(subgroup_data->meta);
+ subgroup_data->meta = malloc(subgroup_data->meta_len);
+ if (!subgroup_data->meta) {
+ for (int j = 0; j < i; j++)
+ free(bcst_source->subgroup_data[j].meta);
+
+ free(bcst_source->subgroup_data);
+ return -1;
+ }
+
+ memcpy(subgroup_data->meta, value, subgroup_data->meta_len);
+ value += subgroup_data->meta_len;
+ }
+
+ return 0;
+}
+
+static int bass_build_bcst_source_from_read_rsp(
+ struct bt_bcst_source *bcst_source,
+ const uint8_t *value)
+{
+ return bass_build_bcst_source_from_notif(bcst_source, value);
+}
+
+static uint8_t *bass_build_notif_from_bcst_source(struct bt_bcst_source *source,
+ size_t *notif_len)
+{
+ size_t len = 0;
+ uint8_t *notif = NULL;
+ uint8_t *ptr;
+
+ *notif_len = 0;
+
+ if (!source)
+ return NULL;
+
+ len = 15 + source->num_subgroups * 5;
+
+ if (source->encryption == BT_BASS_BIG_ENC_STATE_BAD_CODE)
+ len += BT_BAP_BROADCAST_CODE_SIZE;
+
+ for (size_t i = 0; i < source->num_subgroups; i++) {
+ /* add length for subgroup metadata */
+ len += source->subgroup_data[i].meta_len;
+ }
+
+ notif = malloc(len);
+ if (!notif)
+ return NULL;
+
+ memset(notif, 0, len);
+ ptr = notif;
+
+ /* add source_id field */
+ *ptr = source->id;
+ ptr++;
+
+ /* add addr_type field */
+ *ptr = source->addr_type;
+ ptr++;
+
+ /* add addr field */
+ memcpy(ptr, source->addr, 6);
+ ptr += 6;
+
+ /* add sid field */
+ *ptr = source->sid;
+ ptr++;
+
+ /* add bid field */
+ memcpy(ptr, source->bid, BT_BAP_BROADCAST_ID_SIZE);
+ ptr += 3;
+
+ /* add sync_state field */
+ *ptr = source->sync_state;
+ ptr++;
+
+ /* add encryption field */
+ *ptr = source->encryption;
+ ptr++;
+
+ if (source->encryption == BT_BASS_BIG_ENC_STATE_BAD_CODE) {
+ memcpy(ptr, source->bad_code, BT_BAP_BROADCAST_CODE_SIZE);
+ ptr += BT_BAP_BROADCAST_CODE_SIZE;
+ }
+
+ /* add num_subgroups field */
+ *ptr = source->num_subgroups;
+ ptr++;
+
+ for (size_t i = 0; i < source->num_subgroups; i++) {
+ /* add subgroup bis_sync */
+ memcpy(ptr, &source->subgroup_data[i].bis_sync,
+ sizeof(uint32_t));
+ ptr += sizeof(uint32_t);
+
+ /* add subgroup meta_len */
+ *ptr = source->subgroup_data[i].meta_len;
+ ptr++;
+
+ /* add subgroup metadata */
+ if (source->subgroup_data[i].meta_len > 0) {
+ memcpy(ptr, source->subgroup_data[i].meta,
+ source->subgroup_data[i].meta_len);
+ ptr += source->subgroup_data[i].meta_len;
+ }
+ }
+
+ *notif_len = len;
+ return notif;
+}
+
+static uint8_t *bass_build_read_rsp_from_bcst_source(struct bt_bcst_source *source,
+ size_t *rsp_len)
+{
+ return bass_build_notif_from_bcst_source(source, rsp_len);
+}
+
+static bool bass_src_id_match(const void *data, const void *match_data)
+{
+ const struct bt_bcst_source *src = data;
+ const uint8_t *id = match_data;
+
+ return (src->id == *id);
+}
+
+static void bass_fill_create_big_sync_cmd_from_pa_report(
+ struct bt_hci_cmd_le_big_create_sync *cmd)
+{
+ struct iovec iov;
+ struct bt_ad_structure *ad_structure;
+ uint16_t uuid;
+ struct bt_hci_le_pa_base_data *base_data;
+ uint8_t *bis_index = (uint8_t *)cmd->bis;
+
+ if (!pa_report)
+ return;
+
+ iov.iov_base = pa_report->data;
+ iov.iov_len = pa_report->data_len;
+
+ ad_structure = util_iov_pull_mem(&iov, sizeof(*ad_structure));
+ if (ad_structure->ad_type != BT_AD_SERVICE_DATA16)
+ return;
+
+ uuid = bt_get_le16(util_iov_pull_mem(&iov, sizeof(uint16_t)));
+ if (uuid != BASIC_AUDIO_ANNOUNCEMENT_SERVICE_UUID)
+ return;
+
+ base_data = util_iov_pull_mem(&iov, sizeof(*base_data));
+
+ for (int i = 0; i < base_data->num_subgroups; i++) {
+ struct bt_hci_le_pa_base_subgroup *subgroup;
+ struct bt_hci_lv_data *codec_cfg;
+ struct bt_hci_lv_data *metadata;
+
+ subgroup = util_iov_pull_mem(&iov, sizeof(*subgroup));
+
+ codec_cfg = util_iov_pull_mem(&iov, sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+
+ metadata = util_iov_pull_mem(&iov, sizeof(*metadata));
+ util_iov_pull_mem(&iov, metadata->len);
+
+ for (int j = 0; j < subgroup->num_bis; j++) {
+ struct bt_hci_le_pa_base_bis *bis;
+ struct bt_hci_lv_data *codec_cfg;
+
+ bis = util_iov_pull_mem(&iov, sizeof(*bis));
+ *bis_index = bis->index;
+ bis_index++;
+
+ codec_cfg = util_iov_pull_mem(&iov,
+ sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+ }
+ }
+}
+
+static void bass_fill_bcst_source_from_pa_report(
+ struct bt_bcst_source *bcst_source)
+{
+ struct iovec iov;
+ struct bt_ad_structure *ad_structure;
+ uint16_t uuid;
+ struct bt_hci_le_pa_base_data *base_data;
+
+ if (!pa_report)
+ return;
+
+ iov.iov_base = pa_report->data;
+ iov.iov_len = pa_report->data_len;
+
+ ad_structure = util_iov_pull_mem(&iov, sizeof(*ad_structure));
+ if (ad_structure->ad_type != BT_AD_SERVICE_DATA16)
+ return;
+
+ uuid = bt_get_le16(util_iov_pull_mem(&iov, sizeof(uint16_t)));
+ if (uuid != BASIC_AUDIO_ANNOUNCEMENT_SERVICE_UUID)
+ return;
+
+ base_data = util_iov_pull_mem(&iov, sizeof(*base_data));
+
+ if (bcst_source->sync_state == BT_BASS_NOT_SYNCHRONIZED_TO_PA) {
+ bcst_source->sync_state = BT_BASS_SYNCHRONIZED_TO_PA;
+ bcst_source->num_subgroups = base_data->num_subgroups;
+
+ bcst_source->subgroup_data = malloc(base_data->num_subgroups *
+ sizeof(struct bt_bcst_source));
+ if (!bcst_source->subgroup_data)
+ return;
+
+ memset(bcst_source->subgroup_data, 0, base_data->num_subgroups *
+ sizeof(struct bt_bcst_source));
+ }
+
+ if (bcst_source->num_subgroups != base_data->num_subgroups)
+ return;
+
+ for (int i = 0; i < base_data->num_subgroups; i++) {
+ struct bt_hci_le_pa_base_subgroup *subgroup;
+ struct bt_hci_lv_data *codec_cfg;
+ struct bt_hci_lv_data *metadata;
+
+ subgroup = util_iov_pull_mem(&iov, sizeof(*subgroup));
+ codec_cfg = util_iov_pull_mem(&iov, sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+
+ metadata = util_iov_pull_mem(&iov, sizeof(*metadata));
+ util_iov_pull_mem(&iov, metadata->len);
+
+ bcst_source->subgroup_data[i].meta_len = metadata->len;
+ free(bcst_source->subgroup_data[i].meta);
+
+ bcst_source->subgroup_data[i].meta = malloc(metadata->len);
+ if (!bcst_source->subgroup_data[i].meta)
+ return;
+
+ memcpy(bcst_source->subgroup_data[i].meta,
+ metadata->data, metadata->len);
+
+ for (int j = 0; j < subgroup->num_bis; j++) {
+ struct bt_hci_le_pa_base_bis *bis;
+ struct bt_hci_lv_data *codec_cfg;
+
+ bis = util_iov_pull_mem(&iov, sizeof(*bis));
+ codec_cfg = util_iov_pull_mem(&iov, sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+ }
+ }
+}
+
+static void bass_fill_bcst_source_bis_sync_bitmask(
+ struct bt_bcst_source *bcst_source)
+{
+ struct iovec iov;
+ struct bt_ad_structure *ad_structure;
+ uint16_t uuid;
+ struct bt_hci_le_pa_base_data *base_data;
+
+ if (!pa_report)
+ return;
+
+ iov.iov_base = pa_report->data;
+ iov.iov_len = pa_report->data_len;
+
+ ad_structure = util_iov_pull_mem(&iov, sizeof(*ad_structure));
+ if (ad_structure->ad_type != BT_AD_SERVICE_DATA16)
+ return;
+
+ uuid = bt_get_le16(util_iov_pull_mem(&iov, sizeof(uint16_t)));
+ if (uuid != BASIC_AUDIO_ANNOUNCEMENT_SERVICE_UUID)
+ return;
+
+ base_data = util_iov_pull_mem(&iov, sizeof(*base_data));
+
+ for (int i = 0; i < base_data->num_subgroups; i++) {
+ struct bt_hci_le_pa_base_subgroup *subgroup;
+ struct bt_hci_lv_data *codec_cfg;
+ struct bt_hci_lv_data *metadata;
+
+ subgroup = util_iov_pull_mem(&iov, sizeof(*subgroup));
+
+ codec_cfg = util_iov_pull_mem(&iov, sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+
+ metadata = util_iov_pull_mem(&iov, sizeof(*metadata));
+ util_iov_pull_mem(&iov, metadata->len);
+
+ for (int j = 0; j < subgroup->num_bis; j++) {
+ struct bt_hci_le_pa_base_bis *bis;
+ struct bt_hci_lv_data *codec_cfg;
+
+ bis = util_iov_pull_mem(&iov, sizeof(*bis));
+ bcst_source->subgroup_data[i].bis_sync |=
+ (1 << (bis->index - 1));
+
+ codec_cfg = util_iov_pull_mem(&iov,
+ sizeof(*codec_cfg));
+ util_iov_pull_mem(&iov, codec_cfg->len);
+ }
+ }
+}
+
+static void bass_handle_set_broadcast_code_opcode(struct bt_bass *bass,
+ struct gatt_db_attribute *attrib,
+ uint8_t opcode,
+ unsigned int id,
+ struct iovec *iov,
+ struct bt_att *att)
+{
+ struct bt_bap *bap = bap_get_session(att, bass->bdb->db);
+ struct bt_bass_set_bcst_code_params *params;
+ struct bt_bcst_source *bcst_source;
+ uint8_t *notify_data;
+ size_t notify_data_len;
+ struct hci_request rq;
+
+ struct bt_hci_evt_le_big_sync_estabilished *big_sync_established_evt = NULL;
+ int big_sync_established_evt_len = 0;
+
+ if (!big_sync_cmd)
+ goto done;
+
+ big_sync_established_evt_len =
+ sizeof(struct bt_hci_evt_le_big_sync_estabilished) +
+ big_sync_cmd->num_bis * sizeof(uint16_t);
+
+ big_sync_established_evt = malloc(big_sync_established_evt_len);
+ if (big_sync_established_evt == NULL)
+ goto done;
+
+ /* validate Set Broadcast_Code command length */
+ if (iov->iov_len < sizeof(struct bt_bass_set_bcst_code_params)) {
+ if (opcode == BT_ATT_OP_WRITE_REQ)
+ gatt_db_attribute_write_result(attrib, id,
+ BT_ERROR_WRITE_REQUEST_REJECTED);
+
+ goto done;
+ }
+
+ /* get Set Broadcast_Code command parameters */
+ params = util_iov_pull_mem(iov, sizeof(*params));
+
+ bcst_source = queue_find(bap->ldb->bass_bcst_sources,
+ bass_src_id_match,
+ ¶ms->source_id);
+
+ if (bcst_source == NULL) {
+ /* no source matches the written source_id */
+ if (opcode == BT_ATT_OP_WRITE_REQ)
+ gatt_db_attribute_write_result(attrib, id,
+ BT_BASS_ERROR_INVALID_SOURCE_ID);
+
+ goto done;
+ }
+
+ memcpy(big_sync_cmd->bcode, params->bcst_code,
+ BT_BAP_BROADCAST_CODE_SIZE);
+
+ rq.ogf = OGF_LE_CTL;
+ rq.ocf = OCF_LE_BIG_CREATE_SYNC;
+ rq.event = BT_HCI_EVT_LE_BIG_SYNC_ESTABILISHED;
+ rq.cparam = big_sync_cmd;
+ rq.clen = big_sync_cmd_len;
+ rq.rparam = big_sync_established_evt;
+ rq.rlen = big_sync_established_evt_len;
+
+ if (hci_send_req(hci_fd, &rq, 0) < 0) {
+ DBG(bap, "Failed to send Big Sync Create command: %s",
+ strerror(errno));
+ goto done;
+ }
+
+ if (big_sync_established_evt->status == 0x00) {
+ bcst_source->encryption = BT_BASS_BIG_ENC_STATE_DEC;
+
+ bass_fill_bcst_source_bis_sync_bitmask(bcst_source);
+ } else {
+ bcst_source->encryption = BT_BASS_BIG_ENC_STATE_BAD_CODE;
+ memcpy(bcst_source->bad_code, params->bcst_code,
+ BT_BAP_BROADCAST_CODE_SIZE);
+ }
+
+ notify_data = bass_build_notif_from_bcst_source(bcst_source,
+ ¬ify_data_len);
+
+ gatt_db_attribute_notify(bcst_source->attr,
+ (void *)notify_data,
+ notify_data_len, att);
+
+ free(notify_data);
+
+done:
+
+ free(big_sync_cmd);
+ big_sync_cmd = NULL;
+ free(big_sync_established_evt);
+ free(pa_report);
+ pa_report = NULL;
+ big_sync_cmd_len = 0;
+}
+
+#define BASS_OP(_str, _op, _size, _func) \
+ { \
+ .str = _str, \
+ .op = _op, \
+ .size = _size, \
+ .func = _func, \
+ }
+
+struct bass_op_handler {
+ const char *str;
+ uint8_t op;
+ size_t size;
+ void (*func)(struct bt_bass *bass,
+ struct gatt_db_attribute *attrib,
+ uint8_t opcode,
+ unsigned int id,
+ struct iovec *iov,
+ struct bt_att *att);
+} bass_handlers[] = {
+ BASS_OP("Set Broadcast_Code", BT_BASS_SET_BCST_CODE,
+ sizeof(struct bt_bass_set_bcst_code_params),
+ bass_handle_set_broadcast_code_opcode)
+};
+
+static void bass_broadcast_audio_scan_cp_write(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ const uint8_t *value, size_t len,
+ uint8_t opcode, struct bt_att *att,
+ void *user_data)
+{
+ struct bt_bass *bass = user_data;
+ struct bt_bass_bcst_audio_scan_cp_hdr *hdr;
+ struct bass_op_handler *handler;
+ struct iovec iov = {
+ .iov_base = (void *)value,
+ .iov_len = len,
+ };
+
+ /* validate written command length */
+ if (len < (sizeof(*hdr))) {
+ if (opcode == BT_ATT_OP_WRITE_REQ) {
+ gatt_db_attribute_write_result(attrib, id,
+ BT_ERROR_WRITE_REQUEST_REJECTED);
+ }
+ return;
+ }
+
+ /* get command header */
+ hdr = util_iov_pull_mem(&iov, sizeof(*hdr));
+
+ if (hdr->op != BT_BASS_SET_BCST_CODE) {
+ if (opcode == BT_ATT_OP_WRITE_REQ) {
+ gatt_db_attribute_write_result(attrib, id,
+ BT_BASS_ERROR_OPCODE_NOT_SUPPORTED);
+ }
+
+ return;
+ }
+
+ /* call the appropriate opcode handler */
+ for (handler = bass_handlers; handler && handler->str; handler++) {
+ if (handler->op == hdr->op) {
+ handler->func(bass, attrib, opcode, id, &iov, att);
+ break;
+ }
+ }
+
+ gatt_db_attribute_write_result(attrib, id, 0x00);
+}
+
+static bool bass_source_match_attrib(const void *data, const void *match_data)
+{
+ const struct bt_bcst_source *src = data;
+ const struct gatt_db_attribute *attr = match_data;
+
+ return (src->attr == attr);
+}
+
+static bool bass_source_match_sid(const void *data, const void *match_data)
+{
+ const struct bt_bcst_source *src = data;
+ const uint8_t sid = *(const uint8_t *)match_data;
+
+ return (src->sid == sid);
+}
+
+static void bass_bcst_receive_state_read(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, struct bt_att *att,
+ void *user_data)
+{
+ struct bt_bass *bass = user_data;
+ struct bt_bap *bap = bap_get_session(att, bass->bdb->db);
+ uint8_t *rsp;
+ size_t rsp_len;
+ struct bt_bcst_source *bcst_source;
+
+ bcst_source = queue_find(bap->ldb->bass_bcst_sources,
+ bass_source_match_attrib,
+ attrib);
+
+ if (!bcst_source) {
+ gatt_db_attribute_read_result(attrib, id, 0, NULL,
+ 0);
+ return;
+ }
+
+ /* build read response */
+ rsp = bass_build_read_rsp_from_bcst_source(bcst_source, &rsp_len);
+
+ if (!rsp) {
+ gatt_db_attribute_read_result(attrib, id, BT_ATT_ERROR_UNLIKELY,
+ NULL, 0);
+ return;
+ }
+
+ gatt_db_attribute_read_result(attrib, id, 0, (void *)rsp,
+ rsp_len);
+
+ free(rsp);
+}
+
+static void bcst_recv_new(struct bt_bass *bass, int i)
+{
+ struct bt_bcst_recv_state *bcst_recv_state;
+ bt_uuid_t uuid;
+
+ if (!bass)
+ return;
+
+ bcst_recv_state = new0(struct bt_bcst_recv_state, 1);
+ bcst_recv_state->bass = bass;
+
+ bt_uuid16_create(&uuid, BCST_RECV_STATE_UUID);
+ bcst_recv_state->attr = gatt_db_service_add_characteristic(bass->service, &uuid,
+ BT_ATT_PERM_READ,
+ BT_GATT_CHRC_PROP_READ |
+ BT_GATT_CHRC_PROP_NOTIFY,
+ bass_bcst_receive_state_read, NULL,
+ bass);
+
+ bcst_recv_state->ccc = gatt_db_service_add_ccc(bass->service,
+ BT_ATT_PERM_READ | BT_ATT_PERM_WRITE);
+
+ bass->bcst_recv_states[i] = bcst_recv_state;
+}
+
+static struct bt_bass *bass_new(struct gatt_db *db)
+{
+ struct bt_bass *bass;
+ bt_uuid_t uuid;
+ int i;
+
+ if (!db)
+ return NULL;
+
+ bass = new0(struct bt_bass, 1);
+
+ /* Populate DB with BASS attributes */
+ bt_uuid16_create(&uuid, BASS_UUID);
+ bass->service = gatt_db_add_service(db, &uuid, true,
+ 3 + (NUM_BCST_RECV_STATES * 3));
+
+ for (i = 0; i < NUM_BCST_RECV_STATES; i++)
+ bcst_recv_new(bass, i);
+
+ bt_uuid16_create(&uuid, BCST_AUDIO_SCAN_CP_UUID);
+ bass->broadcast_audio_scan_cp = gatt_db_service_add_characteristic(bass->service,
+ &uuid,
+ BT_ATT_PERM_WRITE,
+ BT_GATT_CHRC_PROP_WRITE,
+ NULL, bass_broadcast_audio_scan_cp_write,
+ bass);
+
+ gatt_db_service_set_active(bass->service, true);
+
+ return bass;
+}
+
static struct bt_bap_db *bap_db_new(struct gatt_db *db)
{
struct bt_bap_db *bdb;
@@ -2182,6 +2874,7 @@ static struct bt_bap_db *bap_db_new(struct gatt_db *db)
bdb->sinks = queue_new();
bdb->sources = queue_new();
bdb->endpoints = queue_new();
+ bdb->bass_bcst_sources = queue_new();
if (!bap_db)
bap_db = queue_new();
@@ -2192,6 +2885,9 @@ static struct bt_bap_db *bap_db_new(struct gatt_db *db)
bdb->ascs = ascs_new(db);
bdb->ascs->bdb = bdb;
+ bdb->bass = bass_new(db);
+ bdb->bass->bdb = bdb;
+
queue_push_tail(bap_db, bdb);
return bdb;
@@ -2236,6 +2932,20 @@ static struct bt_ascs *bap_get_ascs(struct bt_bap *bap)
return bap->rdb->ascs;
}
+static struct bt_bass *bap_get_bass(struct bt_bap *bap)
+{
+ if (!bap)
+ return NULL;
+
+ if (bap->rdb->bass)
+ return bap->rdb->bass;
+
+ bap->rdb->bass = new0(struct bt_bass, 1);
+ bap->rdb->bass->bdb = bap->rdb;
+
+ return bap->rdb->bass;
+}
+
static bool match_codec(const void *data, const void *user_data)
{
const struct bt_bap_pac *pac = data;
@@ -2321,6 +3031,17 @@ static void bap_pac_free(void *data)
free(pac);
}
+static void bass_bcst_source_free(void *data)
+{
+ struct bt_bcst_source *bcst_source = data;
+
+ for (int i = 0; i < bcst_source->num_subgroups; i++)
+ free(bcst_source->subgroup_data[i].meta);
+
+ free(bcst_source->subgroup_data);
+ free(bcst_source);
+}
+
static void bap_add_sink(struct bt_bap_pac *pac)
{
struct iovec iov;
@@ -2512,10 +3233,12 @@ static void bap_db_free(void *data)
queue_destroy(bdb->sinks, bap_pac_free);
queue_destroy(bdb->sources, bap_pac_free);
queue_destroy(bdb->endpoints, free);
+ queue_destroy(bdb->bass_bcst_sources, bass_bcst_source_free);
gatt_db_unref(bdb->db);
free(bdb->pacs);
free(bdb->ascs);
+ free(bdb->bass);
free(bdb);
}
@@ -2663,6 +3386,7 @@ struct bt_bap *bt_bap_new(struct gatt_db *ldb, struct gatt_db *rdb)
bdb->sinks = queue_new();
bdb->sources = queue_new();
bdb->endpoints = queue_new();
+ bdb->bass_bcst_sources = queue_new();
bap->rdb = bdb;
@@ -3670,6 +4394,119 @@ static void foreach_ascs_char(struct gatt_db_attribute *attr, void *user_data)
}
}
+static void read_broadcast_receive_state(struct bt_bap *bap, bool success, uint8_t att_ecode,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
+{
+ struct gatt_db_attribute *attr = user_data;
+ struct bt_bcst_source *bcst_source = NULL;
+
+ if (!success) {
+ DBG(bap, "Unable to read Broadcast Receive State: error 0x%02x", att_ecode);
+ return;
+ }
+
+ if (length == 0)
+ return;
+
+ bcst_source = queue_find(bap->rdb->bass_bcst_sources,
+ bass_source_match_attrib, attr);
+
+ if (!bcst_source) {
+ bcst_source = malloc(sizeof(struct bt_bcst_source));
+
+ if (bcst_source == NULL) {
+ DBG(bap, "Failed to allocate memory for broadcast source");
+ return;
+ }
+
+ memset(bcst_source, 0, sizeof(struct bt_bcst_source));
+ bcst_source->attr = attr;
+
+ queue_push_tail(bap->rdb->bass_bcst_sources, bcst_source);
+ }
+
+ if (bass_build_bcst_source_from_read_rsp(bcst_source, value)) {
+ free(bcst_source);
+ DBG(bap, "Failed to populate broadcast source data");
+ return;
+ }
+}
+
+static void bcst_recv_state_notify(struct bt_bap *bap, uint16_t value_handle,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
+{
+ struct gatt_db_attribute *attr = user_data;
+ struct bt_bcst_source *bcst_source = NULL;
+
+ bcst_source = queue_find(bap->rdb->bass_bcst_sources,
+ bass_source_match_attrib, attr);
+
+ if (!bcst_source) {
+ bcst_source = malloc(sizeof(struct bt_bcst_source));
+
+ if (bcst_source == NULL) {
+ DBG(bap, "Failed to allocate memory for broadcast source");
+ return;
+ }
+
+ memset(bcst_source, 0, sizeof(struct bt_bcst_source));
+ bcst_source->attr = attr;
+
+ queue_push_tail(bap->rdb->bass_bcst_sources, bcst_source);
+ }
+
+ if (bass_build_bcst_source_from_notif(bcst_source, value)) {
+ free(bcst_source);
+ DBG(bap, "Failed to populate broadcast source data");
+ return;
+ }
+}
+
+static void foreach_bass_char(struct gatt_db_attribute *attr, void *user_data)
+{
+ struct bt_bap *bap = user_data;
+ uint16_t value_handle;
+ bt_uuid_t uuid, uuid_bcst_audio_scan_cp, uuid_bcst_recv_state;
+ struct bt_bass *bass;
+
+ /* get attribute value handle and uuid */
+ if (!gatt_db_attribute_get_char_data(attr, NULL, &value_handle,
+ NULL, NULL, &uuid))
+ return;
+
+ bt_uuid16_create(&uuid_bcst_audio_scan_cp, BCST_AUDIO_SCAN_CP_UUID);
+ bt_uuid16_create(&uuid_bcst_recv_state, BCST_RECV_STATE_UUID);
+
+ if (!bt_uuid_cmp(&uuid, &uuid_bcst_audio_scan_cp)) {
+
+ /* found Broadcast Audio Scan Control Point characteristic */
+ bass = bap_get_bass(bap);
+
+ if (!bass || bass->broadcast_audio_scan_cp)
+ return;
+
+ /* store characteristic reference */
+ bass->broadcast_audio_scan_cp = attr;
+
+ DBG(bap, "Broadcast Audio Scan Control Point found: handle 0x%04x",
+ value_handle);
+ }
+
+ if (!bt_uuid_cmp(&uuid, &uuid_bcst_recv_state)) {
+
+ /* found Broadcast Receive State characteristic */
+ bap_read_value(bap, value_handle, read_broadcast_receive_state, attr);
+
+ (void)bap_register_notify(bap, value_handle,
+ bcst_recv_state_notify, attr);
+
+ DBG(bap, "Broadcast receive State found: handle 0x%04x",
+ value_handle);
+ }
+}
+
static void foreach_ascs_service(struct gatt_db_attribute *attr,
void *user_data)
{
@@ -3683,6 +4520,19 @@ static void foreach_ascs_service(struct gatt_db_attribute *attr,
gatt_db_service_foreach_char(attr, foreach_ascs_char, bap);
}
+static void foreach_bass_service(struct gatt_db_attribute *attr,
+ void *user_data)
+{
+ struct bt_bap *bap = user_data;
+ struct bt_bass *bass = bap_get_bass(bap);
+
+ /* store BASS attribute reference */
+ bass->service = attr;
+
+ /* handle BASS attributes */
+ gatt_db_service_foreach_char(attr, foreach_bass_char, bap);
+}
+
static void bap_endpoint_foreach(void *data, void *user_data)
{
struct bt_bap_endpoint *ep = data;
@@ -3778,6 +4628,9 @@ clone:
bt_uuid16_create(&uuid, ASCS_UUID);
gatt_db_foreach_service(bap->rdb->db, &uuid, foreach_ascs_service, bap);
+ bt_uuid16_create(&uuid, BASS_UUID);
+ gatt_db_foreach_service(bap->rdb->db, &uuid, foreach_bass_service, bap);
+
return true;
}
@@ -4834,3 +5687,215 @@ bool bt_bap_stream_io_is_connecting(struct bt_bap_stream *stream, int *fd)
return io->connecting;
}
+
+void bap_big_info_adv_report_received_cb(struct gatt_db *db, uint8_t source_id,
+ struct bt_hci_evt_le_big_info_adv_report *big_info_adv_report)
+{
+ struct bt_bap_db *bdb = bap_get_db(db);
+ struct bt_bcst_source *bcst_source = NULL;
+ size_t notify_data_len = 0;
+ uint8_t *notify_data;
+ struct hci_request rq;
+ struct bt_hci_evt_le_big_sync_estabilished *big_sync_established_evt = NULL;
+ int big_sync_established_evt_len = 0;
+
+ if (!pa_report)
+ return;
+
+ bcst_source = queue_find(bdb->bass_bcst_sources,
+ bass_src_id_match,
+ &source_id);
+
+ if (bcst_source == NULL) {
+ free(pa_report);
+ pa_report = NULL;
+ return;
+ }
+
+ big_sync_cmd_len = sizeof(struct bt_hci_cmd_le_big_create_sync)
+ + big_info_adv_report->num_bis *
+ sizeof(struct bt_hci_bis_sync);
+
+ free(big_sync_cmd);
+ big_sync_cmd = malloc(big_sync_cmd_len);
+
+ if (!big_sync_cmd) {
+ free(pa_report);
+ pa_report = NULL;
+ return;
+ }
+
+ memset(big_sync_cmd, 0, big_sync_cmd_len);
+
+ big_sync_cmd->sync_handle = big_info_adv_report->sync_handle;
+ big_sync_cmd->encryption = big_info_adv_report->encryption;
+ big_sync_cmd->timeout = 0x4000;
+ big_sync_cmd->num_bis = big_info_adv_report->num_bis;
+
+ bass_fill_create_big_sync_cmd_from_pa_report(big_sync_cmd);
+
+ if (big_info_adv_report->encryption == 0x01) {
+ bcst_source->encryption = BT_BASS_BIG_ENC_STATE_BCODE_REQ;
+ } else {
+ bcst_source->encryption = BT_BASS_BIG_ENC_STATE_NO_ENC;
+
+ big_sync_established_evt_len =
+ sizeof(struct bt_hci_evt_le_big_sync_estabilished) +
+ big_sync_cmd->num_bis * sizeof(uint16_t);
+
+ big_sync_established_evt = malloc(big_sync_established_evt_len);
+ if (big_sync_established_evt == NULL) {
+ free(pa_report);
+ pa_report = NULL;
+
+ free(big_sync_cmd);
+ big_sync_cmd = NULL;
+ big_sync_cmd_len = 0;
+
+ goto done;
+ }
+
+ /* create BIG sync */
+ rq.ogf = OGF_LE_CTL;
+ rq.ocf = 0x006B;
+ rq.event = BT_HCI_EVT_LE_BIG_SYNC_ESTABILISHED;
+ rq.cparam = big_sync_cmd;
+ rq.clen = big_sync_cmd_len;
+ rq.rparam = big_sync_established_evt;
+ rq.rlen = big_sync_established_evt_len;
+
+ if (hci_send_req(hci_fd, &rq, 0) < 0) {
+ free(pa_report);
+ pa_report = NULL;
+
+ free(big_sync_cmd);
+ big_sync_cmd = NULL;
+ big_sync_cmd_len = 0;
+
+ free(big_sync_established_evt);
+
+ goto done;
+ }
+
+ if (!big_sync_established_evt->status)
+ bass_fill_bcst_source_bis_sync_bitmask(bcst_source);
+ }
+
+done:
+
+ notify_data = bass_build_notif_from_bcst_source(bcst_source,
+ ¬ify_data_len);
+
+ gatt_db_attribute_notify(bcst_source->attr, (void *)notify_data,
+ notify_data_len, NULL);
+
+ free(notify_data);
+}
+
+void bap_pa_report_received_cb(struct gatt_db *db, uint8_t source_id,
+ struct bt_hci_le_pa_report *report)
+{
+ struct bt_bcst_source *bcst_source = NULL;
+ struct bt_bap_db *bdb = bap_get_db(db);
+ uint8_t report_len = sizeof(struct bt_hci_le_pa_report) +
+ report->data_len;
+
+ printf("Report len = %d\n\n", report->data_len);
+
+ free(pa_report);
+ pa_report = malloc(report_len);
+ if (!pa_report)
+ return;
+
+ memcpy(pa_report, report, report_len);
+
+ bcst_source = queue_find(bdb->bass_bcst_sources,
+ bass_src_id_match,
+ &source_id);
+
+ if (!bcst_source)
+ return;
+
+ bass_fill_bcst_source_from_pa_report(bcst_source);
+}
+
+int bap_ext_adv_report_received_cb(struct gatt_db *db,
+ struct bt_hci_le_ext_adv_report *ext_adv_report)
+{
+ struct bt_bcst_source *bcst_source = NULL;
+ struct gatt_db_attribute *attr = NULL;
+ struct bt_bap_db *bdb = bap_get_db(db);
+ struct bt_ad_structure *ad_structure;
+ uint16_t uuid;
+ uint8_t *bid;
+
+ struct iovec iov = {
+ .iov_base = ext_adv_report->data,
+ .iov_len = ext_adv_report->data_len,
+ };
+
+ bcst_source = queue_find(bdb->bass_bcst_sources,
+ bass_source_match_sid,
+ &ext_adv_report->sid);
+
+ if (bcst_source != NULL)
+ return -1;
+
+ bcst_source = malloc(sizeof(struct bt_bcst_source));
+
+ if (bcst_source == NULL)
+ return -1;
+
+ memset(bcst_source, 0, sizeof(struct bt_bcst_source));
+
+ bcst_source->id = next_available_source_id++;
+ bcst_source->addr_type = ext_adv_report->addr_type;
+ memcpy(bcst_source->addr, ext_adv_report->addr, 6);
+ bcst_source->sid = ext_adv_report->sid;
+
+ ad_structure = util_iov_pull_mem(&iov, sizeof(*ad_structure));
+
+ while (ad_structure) {
+ if (ad_structure->ad_type == BT_AD_SERVICE_DATA16) {
+ uuid = bt_get_le16(util_iov_pull_mem(&iov, sizeof(uint16_t)));
+ if (uuid == BCST_AUDIO_ANNOUNCEMENT_SERVICE_UUID) {
+ bid = util_iov_pull_mem(&iov,
+ BT_BAP_BROADCAST_ID_SIZE);
+ memcpy(bcst_source->bid, bid,
+ BT_BAP_BROADCAST_ID_SIZE);
+ break;
+ }
+ }
+
+ ad_structure = util_iov_pull_mem(&iov, sizeof(*ad_structure));
+ }
+
+ for (int i = 0; i < NUM_BCST_RECV_STATES; i++) {
+ attr = bdb->bass->bcst_recv_states[i]->attr;
+
+ if (queue_find(bdb->bass_bcst_sources,
+ bass_source_match_attrib, attr) == NULL) {
+ bcst_source->attr = attr;
+ break;
+ }
+ }
+
+ queue_push_tail(bdb->bass_bcst_sources, bcst_source);
+
+ return bcst_source->id;
+}
+
+int bt_bap_register_device(int dev_id)
+{
+ /* Open HCI */
+ hci_fd = hci_open_dev(dev_id);
+ if (hci_fd == -1)
+ return -1;
+
+ return 0;
+}
+
+void bt_bap_register_db(struct gatt_db *db)
+{
+ bap_db_new(db);
+}
diff --git a/src/shared/bap.h b/src/shared/bap.h
index 47a15636c..f72ecbd76 100644
--- a/src/shared/bap.h
+++ b/src/shared/bap.h
@@ -9,6 +9,7 @@
#include <stdbool.h>
#include <inttypes.h>
+#include "monitor/bt.h"
#ifndef __packed
#define __packed __attribute__((packed))
@@ -33,6 +34,9 @@
#define BT_BAP_CONFIG_PHY_2M 0x02
#define BT_BAP_CONFIG_PHY_CODEC 0x03
+#define BT_BAP_BROADCAST_CODE_SIZE 16
+#define BT_BAP_BROADCAST_ID_SIZE 3
+
struct bt_bap;
struct bt_bap_pac;
struct bt_bap_stream;
@@ -62,6 +66,17 @@ struct bt_bap_qos {
uint8_t target_latency; /* Target Latency */
};
+struct bt_ad_structure {
+ uint8_t ad_len;
+ uint8_t ad_type;
+ uint8_t value[0];
+} __packed;
+
+struct bt_broadcast_audio_announcement {
+ uint16_t uuid;
+ uint8_t bid[BT_BAP_BROADCAST_ID_SIZE];
+} __packed;
+
typedef void (*bt_bap_ready_func_t)(struct bt_bap *bap, void *user_data);
typedef void (*bt_bap_destroy_func_t)(void *user_data);
typedef void (*bt_bap_debug_func_t)(const char *str, void *user_data);
@@ -267,3 +282,13 @@ uint8_t bt_bap_stream_io_dir(struct bt_bap_stream *stream);
int bt_bap_stream_io_connecting(struct bt_bap_stream *stream, int fd);
bool bt_bap_stream_io_is_connecting(struct bt_bap_stream *stream, int *fd);
+
+int bap_ext_adv_report_received_cb(struct gatt_db *db,
+ struct bt_hci_le_ext_adv_report *ext_adv_report);
+void bap_pa_report_received_cb(struct gatt_db *db, uint8_t source_id,
+ struct bt_hci_le_pa_report *report);
+void bap_big_info_adv_report_received_cb(struct gatt_db *db, uint8_t source_id,
+ struct bt_hci_evt_le_big_info_adv_report *big_info_adv_report);
+
+int bt_bap_register_device(int dev_id);
+void bt_bap_register_db(struct gatt_db *db);
diff --git a/src/shared/bass.h b/src/shared/bass.h
new file mode 100644
index 000000000..cdcb5a700
--- /dev/null
+++ b/src/shared/bass.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2022 Intel Corporation. All rights reserved.
+ *
+ */
+
+#define NUM_BCST_RECV_STATES 2
+
+/* Application error codes */
+#define BT_BASS_ERROR_OPCODE_NOT_SUPPORTED 0x80
+
+#define BT_BASS_ERROR_INVALID_SOURCE_ID 0x81
+
+/* PA_Sync_State values */
+#define BT_BASS_NOT_SYNCHRONIZED_TO_PA 0x00
+#define BT_BASS_SYNC_INFO_RE 0x01
+#define BT_BASS_SYNCHRONIZED_TO_PA 0x02
+#define BT_BASS_FAILED_TO_SYNCHRONIZE_TO_PA 0x03
+#define BT_BASS_NO_PAST 0x04
+
+/* BIG_Encryption values */
+#define BT_BASS_BIG_ENC_STATE_NO_ENC 0x00
+#define BT_BASS_BIG_ENC_STATE_BCODE_REQ 0x01
+#define BT_BASS_BIG_ENC_STATE_DEC 0x02
+#define BT_BASS_BIG_ENC_STATE_BAD_CODE 0x03
+
+/*
+ * Broadcast Audio Scan Control Point
+ * header structure
+ */
+struct bt_bass_bcst_audio_scan_cp_hdr {
+ uint8_t op;
+} __packed;
+
+#define BT_BASS_SET_BCST_CODE 0x04
+
+struct bt_bass_set_bcst_code_params {
+ uint8_t source_id;
+ uint8_t bcst_code[BT_BAP_BROADCAST_CODE_SIZE];
+} __packed;
--
2.34.1
