Bluetooth: controller: Add initial support to update AD in chain

This adds some initial support to update AD in chain. We still only
support placing AD in 1st PDU, but this will properly copy any linked
PDUs that may be added due to e.g. CTEInfo present.

Signed-off-by: Andrzej Kaczmarek <[email protected]>

Author: andrzej-kaczmarek

subsys/bluetooth/controller/ll_sw/ull_adv_internal.h

@@ -110,14 +110,35 @@ uint8_t ull_adv_aux_hdr_set_clear(struct ll_adv_set *adv,
 /* helper function to release periodic advertising instance */
 void ull_adv_sync_release(struct ll_adv_sync_set *sync);
 
+/* helper function to allocate new PDU data for AUX_SYNC_IND and return
+ * previous and new PDU for further processing.
+ */
+uint8_t ull_adv_sync_pdu_alloc(struct ll_adv_set *adv,
+			       uint16_t hdr_add_fields,
+			       uint16_t hdr_rem_fields,
+			       struct adv_pdu_field_data *data,
+			       struct pdu_adv **ter_pdu_prev,
+			       struct pdu_adv **ter_pdu_new,
+			       void **extra_data_prev,
+			       void **extra_data_new,
+			       uint8_t *ter_idx);
+
 /* helper function to set/clear common extended header format fields
  * for AUX_SYNC_IND PDU.
  */
-uint8_t ull_adv_sync_pdu_set_clear(struct ll_adv_set *adv,
+uint8_t ull_adv_sync_pdu_set_clear(struct lll_adv_sync *lll_sync,
+				   struct pdu_adv *ter_pdu_prev,
+				   struct pdu_adv *ter_pdu,
 				   uint16_t hdr_add_fields,
 				   uint16_t hdr_rem_fields,
-				   struct adv_pdu_field_data *data,
-				   uint8_t *ter_idx);
+				   struct adv_pdu_field_data *data);
+
+/* helper function to update extra_data field */
+void ull_adv_sync_extra_data_set_clear(void *extra_data_prev,
+				       void *extra_data_new,
+				       uint16_t hdr_add_fields,
+				       uint16_t hdr_rem_fields,
+				       void *data);
 
 /* helper function to calculate common ext adv payload header length and
  * adjust the data pointer.