From 98aa715f74e54a0be68f6d6ae32a3b4dc95dfa95 Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Wed, 14 Sep 2022 15:27:34 +0200
Subject: [PATCH] gap: add
 gap_periodic_advertising_sync_transfer_set_default_parameters

---
 src/gap.h | 17 +++++++++++++++++
 src/hci.c | 27 +++++++++++++++++++++++++++
 src/hci.h |  8 ++++++++
 3 files changed, 52 insertions(+)

diff --git a/src/gap.h b/src/gap.h
index 014a33306..4f15f56c9 100644
--- a/src/gap.h
+++ b/src/gap.h
@@ -772,6 +772,23 @@ uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_
  */
 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle);
 
+/**
+ * @brief Set Default Periodic Advertising Sync Transfer Parameters
+ * @note The parameters are used for all subsequent connections over the LE transport.
+ *       If mode != 0, an HCI_LE_Periodic_Advertising_Sync_Transfer_Received event will be emitted by the Controller
+ * @param mode 0 = ignore (default), 1 = periodic advertising events disabled
+ *             2 = periodic advertising events enabled with duplicate filtering
+ *             3 = periodic advertising events enabled with duplicate filtering
+ * @return status
+ * @param skip The number of periodic advertising packets that can be skipped after a successful receive
+ * @param sync_timeout Range: 0x000A to 0x4000, Time = N*10 ms, Time Range: 100 ms to 163.84 s
+ * @param cte_type  bit 0 = Do not sync to packets with an AoA Constant Tone Extension
+ *                  bit 1 = Do not sync to packets with an AoD Constant Tone Extension with 1 μs slots
+ *                  bit 2 = Do not sync to packets with an AoD Constant Tone Extension with 2 μs slots
+ *                  bit 3 = Do not sync to packets without a Constant Tone Extension
+ */
+uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type);
+
 /**
  * @brief Remove advertising set from Controller
  * @param advertising_handle
diff --git a/src/hci.c b/src/hci.c
index dfaff16d3..69787c0b8 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -6203,6 +6203,22 @@ static bool hci_run_general_gap_le(void){
         }
     }
 #endif
+#endif
+
+#ifdef ENABLE_LE_CENTRAL
+#ifdef ENABLE_LE_EXTENDED_ADVERTISING
+#ifdef ENABLE_LE_PERIODIC_ADVERTISING
+    if (hci_stack->le_past_set_default_params){
+        hci_stack->le_past_set_default_params = false;
+        hci_send_cmd(&hci_le_set_default_periodic_advertising_sync_transfer_parameters,
+                     hci_stack->le_past_mode,
+                     hci_stack->le_past_skip,
+                     hci_stack->le_past_sync_timeout,
+                     hci_stack->le_past_cte_type);
+        return true;
+    }
+#endif
+#endif
 #endif
 
     // post-pone all actions until stack is fully working
@@ -8138,6 +8154,17 @@ uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){
     hci_run();
     return ERROR_CODE_SUCCESS;
 }
+
+uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type){
+    hci_stack->le_past_mode = mode;
+    hci_stack->le_past_skip = skip;
+    hci_stack->le_past_sync_timeout = sync_timeout;
+    hci_stack->le_past_cte_type = cte_type;
+    hci_stack->le_past_set_default_params = true;
+    hci_run();
+    return ERROR_CODE_SUCCESS;
+}
+
 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */
 
 #endif
diff --git a/src/hci.h b/src/hci.h
index 829756958..270171235 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -1165,6 +1165,7 @@ typedef struct {
 #ifdef ENABLE_LE_EXTENDED_ADVERTISING
     btstack_linked_list_t le_periodic_advertiser_list;
     uint16_t        le_periodic_terminate_sync_handle;
+
     // Periodic Advertising Sync parameters
     uint8_t         le_periodic_sync_options;
     uint8_t         le_periodic_sync_advertising_sid;
@@ -1175,6 +1176,13 @@ typedef struct {
     uint8_t         le_periodic_sync_cte_type;
     le_connecting_state_t le_periodic_sync_state;
     le_connecting_state_t le_periodic_sync_request;
+
+    // Periodic Advertising Sync Transfer (PAST)
+    bool     le_past_set_default_params;
+    uint8_t  le_past_mode;
+    uint16_t le_past_skip;
+    uint16_t le_past_sync_timeout;
+    uint8_t  le_past_cte_type;
 #endif
 #endif