Bluetooth: host: Refactor out scan roles from hci_core to scan

Refactor out the scan roles handling from hci_core.c to its own source
file in scan.c.
Scan roles consists of regular scanning and synchronization to
periodic advertiser.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>

subsys/bluetooth/host/CMakeLists.txt

@@ -36,6 +36,10 @@ if(CONFIG_BT_HCI_HOST)
     hci_common.c
     id.c
     )
+  zephyr_library_sources_ifdef(
+    CONFIG_BT_OBSERVER
+    scan.c
+    )
   zephyr_library_sources_ifdef(
     CONFIG_BT_HOST_CRYPTO
     crypto.c

subsys/bluetooth/host/hci_core.h

@@ -342,6 +342,7 @@ bool bt_le_conn_params_valid(const struct bt_le_conn_param *param);
 int bt_le_set_data_len(struct bt_conn *conn, uint16_t tx_octets, uint16_t tx_time);
 int bt_le_set_phy(struct bt_conn *conn, uint8_t all_phys,
 		  uint8_t pref_tx_phy, uint8_t pref_rx_phy, uint8_t phy_opts);
+uint8_t bt_get_phy(uint8_t hci_phy);
 
 int bt_le_scan_update(bool fast_scan);
 
@@ -378,8 +379,6 @@ int bt_le_adv_set_enable(struct bt_le_ext_adv *adv, bool enable);
 void bt_le_ext_adv_foreach(void (*func)(struct bt_le_ext_adv *adv, void *data),
 			   void *data);
 
-int bt_le_scan_set_enable(uint8_t enable);
-
 void bt_hci_host_num_completed_packets(struct net_buf *buf);
 
 /* HCI event handlers */
@@ -397,3 +396,13 @@ void hci_evt_auth_complete(struct net_buf *buf);
 /* ECC HCI event handlers */
 void bt_hci_evt_le_pkey_complete(struct net_buf *buf);
 void bt_hci_evt_le_dhkey_complete(struct net_buf *buf);
+
+/* Scan HCI event handlers */
+void bt_hci_le_adv_report(struct net_buf *buf);
+void bt_hci_le_scan_timeout(struct net_buf *buf);
+void bt_hci_le_adv_ext_report(struct net_buf *buf);
+void bt_hci_le_per_adv_sync_established(struct net_buf *buf);
+void bt_hci_le_per_adv_report(struct net_buf *buf);
+void bt_hci_le_per_adv_sync_lost(struct net_buf *buf);
+void bt_hci_le_biginfo_adv_report(struct net_buf *buf);
+void bt_hci_le_past_received(struct net_buf *buf);

subsys/bluetooth/host/id.c

@@ -13,6 +13,7 @@
 
 #include "hci_core.h"
 #include "id.h"
+#include "scan.h"
 #include "smp.h"
 #include "conn_internal.h"
 #include "keys.h"

subsys/bluetooth/host/scan.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2017-2021 Nordic Semiconductor ASA
+ * Copyright (c) 2015-2016 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+void bt_scan_reset(void);
+
+bool bt_id_scan_random_addr_check(void);
+
+int bt_le_scan_set_enable(uint8_t enable);