From acf9b10d3ffff26a576b40aab9ac6acb486e0394 Mon Sep 17 00:00:00 2001 From: Luiz Augusto von Dentz Date: Fri, 4 Mar 2022 17:22:25 -0800 Subject: [PATCH] btdev: Implements BT_HCI_CMD_LE_BIG_CREATE_SYNC This sends BT_HCI_EVT_LE_BIG_SYNC_ESTABLISHED when handling BT_HCI_CMD_LE_BIG_CREATE_SYNC. Signed-off-by: Manika Shrivastava Signed-off-by: Ayush Garg --- emulator/btdev.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++---- monitor/bt.h | 1 + 2 files changed, 150 insertions(+), 9 deletions(-) diff --git a/emulator/btdev.c b/emulator/btdev.c index 10fa046..567377c 100755 --- a/emulator/btdev.c +++ b/emulator/btdev.c @@ -40,6 +40,7 @@ #define AL_SIZE 16 #define RL_SIZE 16 #define CIS_SIZE 3 +#define BIS_SIZE 3 #define has_bredr(btdev) (!((btdev)->features[4] & 0x20)) #define has_le(btdev) (!!((btdev)->features[4] & 0x40)) @@ -65,6 +66,7 @@ struct btdev_conn { uint8_t type; struct btdev *dev; struct btdev_conn *link; + void *data; }; struct btdev_al { @@ -199,6 +201,7 @@ struct btdev { uint8_t le_pa_data[31]; struct bt_hci_cmd_le_pa_create_sync pa_sync_cmd; uint16_t le_pa_sync_handle; + uint8_t big_handle; uint8_t le_ltk[16]; struct { struct bt_hci_cmd_le_set_cig_params params; @@ -690,6 +693,7 @@ static void conn_remove(void *data) queue_remove(conn->dev->conns, conn); + free(conn->data); free(conn); } @@ -1121,9 +1125,65 @@ static struct btdev_conn *conn_add_cis(struct btdev_conn *acl, uint16_t handle) return conn_link(acl->dev, acl->link->dev, handle, HCI_ISODATA_PKT); } -static struct btdev_conn *conn_add_bis(struct btdev *dev, uint16_t handle) +static struct btdev_conn *conn_add_bis(struct btdev *dev, uint16_t handle, + const struct bt_hci_bis *bis) { - return conn_new(dev, handle, HCI_ISODATA_PKT); + struct btdev_conn *conn; + + conn = conn_new(dev, handle, HCI_ISODATA_PKT); + if (!conn) + return conn; + + conn->data = util_memdup(bis, sizeof(*bis)); + + return conn; +} + +static struct btdev_conn *find_bis_index(struct btdev *remote, uint8_t index) +{ + struct btdev_conn *conn; + const struct queue_entry *entry; + + for (entry = queue_get_entries(remote->conns); entry; + entry = entry->next) { + conn = entry->data; + + /* Skip if not a broadcast */ + if (conn->type != HCI_ISODATA_PKT || conn->link) + continue; + + if (!index) + return conn; + + index--; + } + + return NULL; +} + +static struct btdev_conn *conn_link_bis(struct btdev *dev, struct btdev *remote, + uint8_t index) +{ + struct btdev_conn *conn; + struct btdev_conn *bis; + + bis = find_bis_index(remote, index); + if (!bis) + return NULL; + + conn = conn_add_bis(dev, ISO_HANDLE, bis->data); + if (!conn) + return NULL; + + bis->link = conn; + conn->link = bis; + + util_debug(dev->debug_callback, dev->debug_data, + "bis %p handle 0x%04x", bis, bis->handle); + util_debug(dev->debug_callback, dev->debug_data, + "conn %p handle 0x%04x", conn, conn->handle); + + return conn; } static void conn_complete(struct btdev *btdev, @@ -5103,8 +5163,6 @@ static void le_pa_sync_estabilished(struct btdev *dev, struct btdev *remote, ev.interval = remote->le_pa_min_interval; ev.clock_accuracy = 0x07; - memset(&dev->pa_sync_cmd, 0, sizeof(dev->pa_sync_cmd)); - le_meta_event(dev, BT_HCI_EVT_LE_PA_SYNC_ESTABLISHED, &ev, sizeof(ev)); send_pa(dev, remote, 0); } @@ -5858,14 +5916,14 @@ static int cmd_create_big_complete(struct btdev *dev, const void *data, memset(&pdu, 0, sizeof(pdu)); - conn = conn_add_bis(dev, ISO_HANDLE); + conn = conn_add_bis(dev, ISO_HANDLE, bis); if (!conn) { pdu.evt.status = BT_HCI_ERR_MEM_CAPACITY_EXCEEDED; goto done; } pdu.evt.handle = cmd->handle; - pdu.evt.num_bis = 0x01; + pdu.evt.num_bis++; pdu.evt.phy = bis->phy; pdu.evt.max_pdu = bis->sdu; memcpy(pdu.evt.sync_delay, bis->sdu_interval, 3); @@ -5910,8 +5968,89 @@ static int cmd_term_big_complete(struct btdev *dev, const void *data, static int cmd_big_create_sync(struct btdev *dev, const void *data, uint8_t len) { - /* TODO */ - return -ENOTSUP; + const struct bt_hci_cmd_le_big_create_sync *cmd = data; + uint8_t status = BT_HCI_ERR_SUCCESS; + + /* If the Sync_Handle does not exist, the Controller shall return the + * error code Unknown Advertising Identifier (0x42). + */ + if (dev->le_pa_sync_handle != le16_to_cpu(cmd->sync_handle)) + status = BT_HCI_ERR_UNKNOWN_ADVERTISING_ID; + + /* If the Host sends this command with a BIG_Handle that is already + * allocated, the Controller shall return the error code Command + * Disallowed (0x0C). + */ + if (dev->big_handle == cmd->handle) + status = BT_HCI_ERR_COMMAND_DISALLOWED; + + /* If the Num_BIS parameter is greater than the total number of BISes + * in the BIG, the Controller shall return the error code Unsupported + * Feature or Parameter Value (0x11). + */ + if (cmd->num_bis != len - sizeof(*cmd)) + status = BT_HCI_ERR_UNSUPPORTED_FEATURE; + + if (status) + return status; + + cmd_status(dev, status, BT_HCI_CMD_LE_BIG_CREATE_SYNC); + + return status; +} + +static int cmd_big_create_sync_complete(struct btdev *dev, const void *data, + uint8_t len) +{ + const struct bt_hci_cmd_le_big_create_sync *cmd = data; + struct __packed { + struct bt_hci_evt_le_big_sync_estabilished ev; + uint16_t bis[BIS_SIZE]; + } pdu; + struct btdev *remote; + struct btdev_conn *conn = NULL; + struct bt_hci_bis *bis; + int i; + + remote = find_btdev_by_bdaddr_type(dev->pa_sync_cmd.addr, + dev->pa_sync_cmd.addr_type); + if (!remote) + return 0; + + memset(&pdu.ev, 0, sizeof(pdu.ev)); + + for (i = 0; i < cmd->num_bis; i++) { + conn = conn_link_bis(dev, remote, i); + if (!conn) + break; + + pdu.bis[i] = cpu_to_le16(conn->handle); + } + + if (i != cmd->num_bis || !conn) { + pdu.ev.status = BT_HCI_ERR_MEM_CAPACITY_EXCEEDED; + le_meta_event(dev, BT_HCI_EVT_LE_BIG_SYNC_ESTABILISHED, &pdu, + sizeof(pdu.ev)); + return 0; + } + + dev->big_handle = cmd->handle; + bis = conn->data; + + pdu.ev.handle = cmd->handle; + memcpy(pdu.ev.latency, bis->sdu_interval, sizeof(pdu.ev.interval)); + pdu.ev.nse = 0x01; + pdu.ev.bn = 0x01; + pdu.ev.pto = 0x00; + pdu.ev.irc = 0x01; + pdu.ev.max_pdu = bis->sdu; + pdu.ev.interval = bis->latency; + pdu.ev.num_bis = cmd->num_bis; + + le_meta_event(dev, BT_HCI_EVT_LE_BIG_SYNC_ESTABILISHED, &pdu, + sizeof(pdu.ev) + (cmd->num_bis * sizeof(uint16_t))); + + return 0; } static int cmd_big_term_sync(struct btdev *dev, const void *data, uint8_t len) @@ -6125,7 +6264,8 @@ static int cmd_config_data_path(struct btdev *dev, const void *data, cmd_create_big_complete), \ CMD(BT_HCI_CMD_LE_CREATE_BIG_TEST, cmd_create_big_test, NULL), \ CMD(BT_HCI_CMD_LE_TERM_BIG, cmd_term_big, cmd_term_big_complete), \ - CMD(BT_HCI_CMD_LE_BIG_CREATE_SYNC, cmd_big_create_sync, NULL), \ + CMD(BT_HCI_CMD_LE_BIG_CREATE_SYNC, cmd_big_create_sync, \ + cmd_big_create_sync_complete), \ CMD(BT_HCI_CMD_LE_BIG_TERM_SYNC, cmd_big_term_sync, NULL), \ CMD(BT_HCI_CMD_LE_REQ_PEER_SCA, cmd_req_peer_sca, NULL), \ CMD(BT_HCI_CMD_LE_SETUP_ISO_PATH, cmd_setup_iso_path, NULL), \ diff --git a/monitor/bt.h b/monitor/bt.h index 4e5ee45..6129b58 100755 --- a/monitor/bt.h +++ b/monitor/bt.h @@ -2796,6 +2796,7 @@ struct bt_hci_cmd_le_term_big { #define BT_HCI_CMD_LE_BIG_CREATE_SYNC 0x206b #define BT_HCI_BIT_LE_BIG_CREATE_SYNC BT_HCI_CMD_BIT(43, 0) struct bt_hci_bis_sync { + uint8_t index; } __attribute__ ((packed)); struct bt_hci_cmd_le_big_create_sync { -- 2.7.4