btdev: Implement BT_HCI_CMD_LE_PERIODIC_ADV_CREATE_SYNC

This adds implementation of BT_HCI_CMD_LE_PERIODIC_ADV_CREATE_SYNC
generating BT_HCI_EVT_LE_PER_SYNC_ESTABLISHED and
BT_HCI_EVT_LE_PER_ADV_REPORT.

Signed-off-by: Manika Shrivastava <manika.sh@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>

diff --git a/emulator/btdev.c b/emulator/btdev.c
index 9189e80..34469d9 100755 (executable)
--- a/emulator/btdev.c
+++ b/emulator/btdev.c
@@ -47,6 +47,7 @@
 #define ACL_HANDLE 42
 #define ISO_HANDLE 257
 #define SCO_HANDLE 257
+#define SYC_HANDLE 1
 
 struct hook {
        btdev_hook_func handler;
@@ -195,6 +196,7 @@ struct btdev {
        uint16_t le_periodic_max_interval;
        uint8_t  le_periodic_data_len;
        uint8_t  le_periodic_data[31];
+       uint16_t le_periodic_sync_handle;
        uint8_t  le_ltk[16];
        struct {
                struct bt_hci_cmd_le_set_cig_params params;
@@ -5294,8 +5296,99 @@ static int cmd_ext_create_conn_complete(struct btdev *dev, const void *data,
 static int cmd_per_adv_create_sync(struct btdev *dev, const void *data,
                                                        uint8_t len)
 {
-       /* TODO */
-       return -ENOTSUP;
+       uint8_t status = BT_HCI_ERR_SUCCESS;
+
+       if (dev->le_periodic_sync_handle)
+               status = BT_HCI_ERR_MEM_CAPACITY_EXCEEDED;
+       else
+               dev->le_periodic_sync_handle = SYC_HANDLE;
+
+       cmd_status(dev, status, BT_HCI_CMD_LE_PERIODIC_ADV_CREATE_SYNC);
+
+       return 0;
+}
+
+static void send_per_adv(struct btdev *dev, const struct btdev *remote,
+                                               uint8_t offset)
+{
+       struct __packed {
+               struct bt_hci_le_per_adv_report ev;
+               uint8_t data[31];
+       } pdu;
+
+       memset(&pdu.ev, 0, sizeof(pdu.ev));
+       pdu.ev.handle = cpu_to_le16(dev->le_periodic_sync_handle);
+       pdu.ev.tx_power = 127;
+       pdu.ev.rssi = 127;
+       pdu.ev.cte_type = 0x0ff;
+
+       if ((size_t) remote->le_periodic_data_len - offset > sizeof(pdu.data)) {
+               pdu.ev.data_status = 0x01;
+               pdu.ev.data_len = sizeof(pdu.data);
+       } else {
+               pdu.ev.data_status = 0x00;
+               pdu.ev.data_len = remote->le_periodic_data_len - offset;
+       }
+
+       memcpy(pdu.data, remote->le_periodic_data + offset, pdu.ev.data_len);
+
+       le_meta_event(dev, BT_HCI_EVT_LE_PER_ADV_REPORT, &pdu,
+                                       sizeof(pdu.ev) + pdu.ev.data_len);
+
+       if (pdu.ev.data_status == 0x01) {
+               offset += pdu.ev.data_len;
+               send_per_adv(dev, remote, offset);
+       }
+}
+
+static void le_per_adv_sync_estabilished(struct btdev *dev,
+               const struct bt_hci_cmd_le_periodic_adv_create_sync *cmd,
+               struct btdev *remote, uint8_t status)
+{
+       struct bt_hci_evt_le_per_sync_established ev;
+
+       memset(&ev, 0, sizeof(ev));
+       ev.status = status;
+
+       if (status) {
+               le_meta_event(dev, BT_HCI_EVT_LE_PER_SYNC_ESTABLISHED, &ev,
+                                                       sizeof(ev));
+               return;
+       }
+
+       ev.handle = cpu_to_le16(dev->le_periodic_sync_handle);
+       ev.addr_type = cmd->addr_type;
+       memcpy(ev.addr, cmd->addr, sizeof(ev.addr));
+       ev.phy = 0x01;
+       ev.interval = remote->le_periodic_min_interval;
+       ev.clock_accuracy = 0x07;
+
+       le_meta_event(dev, BT_HCI_EVT_LE_PER_SYNC_ESTABLISHED, &ev, sizeof(ev));
+       send_per_adv(dev, remote, 0);
+}
+
+static int cmd_per_adv_create_sync_complete(struct btdev *dev, const void *data,
+                                                       uint8_t len)
+{
+       const struct bt_hci_cmd_le_periodic_adv_create_sync *cmd = data;
+       struct btdev *remote;
+
+       /* This command may be issued whether or not scanning is enabled and
+        * scanning may be enabled and disabled (see the LE Set Extended Scan
+        * Enable command) while this command is pending. However,
+        * synchronization can only occur when scanning is enabled. While
+        * scanning is disabled, no attempt to synchronize will take place.
+        */
+       if (!dev->scan_enable)
+               return 0;
+
+       remote = find_btdev_by_bdaddr_type(cmd->addr, cmd->addr_type);
+       if (!remote || !remote->le_periodic_adv_enable)
+               return 0;
+
+       le_per_adv_sync_estabilished(dev, cmd, remote, BT_HCI_ERR_SUCCESS);
+
+       return 0;
 }
 
 static int cmd_per_adv_create_sync_cancel(struct btdev *dev, const void *data,
@@ -5420,7 +5513,7 @@ done:
        CMD(BT_HCI_CMD_LE_EXT_CREATE_CONN, cmd_ext_create_conn, \
                                        cmd_ext_create_conn_complete), \
        CMD(BT_HCI_CMD_LE_PERIODIC_ADV_CREATE_SYNC, cmd_per_adv_create_sync, \
-                                       NULL), \
+                                       cmd_per_adv_create_sync_complete), \
        CMD(BT_HCI_CMD_LE_PERIODIC_ADV_CREATE_SYNC_CANCEL, \
                                        cmd_per_adv_create_sync_cancel, NULL), \
        CMD(BT_HCI_CMD_LE_PERIODIC_ADV_TERM_SYNC, cmd_per_adv_term_sync, \