nimble/host: Add APIs to handle vs HCI commands and events

This adds API to send a vs hci command and an event to handle vs hci
events.

nimble/host/include/host/ble_gap.h

@@ -139,6 +139,7 @@ struct hci_conn_update;
 #define BLE_GAP_EVENT_TRANSMIT_POWER        26
 #define BLE_GAP_EVENT_PARING_COMPLETE       27
 #define BLE_GAP_EVENT_SUBRATE_CHANGE        28
+#define BLE_GAP_EVENT_VS_HCI                29
 
 /*** Reason codes for the subscribe GAP event. */
 
@@ -1071,6 +1072,19 @@ struct ble_gap_event {
             uint16_t supervision_tmo;
         } subrate_change;
 #endif
+
+#if MYNEWT_VAL(BLE_HCI_VS)
+        /**
+         * Represents a received vendor-specific HCI event
+         *
+         * Valid for the following event types:
+         *     o BLE_GAP_EVENT_VS_HCI
+         */
+        struct {
+            const void *ev;
+            uint8_t length;
+        } vs_hci;
+#endif
     };
 };
 

nimble/host/include/host/ble_hs_hci.h

@@ -102,6 +102,24 @@ int ble_hs_hci_set_chan_class(const uint8_t *chan_map);
  */
 int ble_hs_hci_rand(void *dst, int len);
 
+#if MYNEWT_VAL(BLE_HCI_VS)
+/**
+ * Send an arbitrary HCI command to the controller.
+ *
+ * The command has to be a vendor-specific command, i.e. OGF=0x3f is always
+ * assumed.
+ *
+ * @param ocf     OCF for vendor-specific HCI command
+ * @param cmdbuf  command buffer
+ * @param cmdlen  length of command buffer
+ * @param rspbuf  response buffer
+ * @param rsplen  length of response buffer
+ * @return  0 on success, error code on failure
+ */
+int ble_hs_hci_send_vs_cmd(uint16_t ocf, const void *cmdbuf, uint8_t cmdlen,
+                           void *rspbuf, uint8_t rsplen);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

nimble/host/src/ble_gap.c

@@ -6083,6 +6083,21 @@ ble_gap_mtu_event(uint16_t conn_handle, uint16_t cid, uint16_t mtu)
 #endif
 }
 
+#if MYNEWT_VAL(BLE_HCI_VS)
+void
+ble_gap_vs_hci_event(const void *buf, uint8_t len)
+{
+    struct ble_gap_event event;
+
+    memset(&event, 0, sizeof event);
+    event.type = BLE_GAP_EVENT_VS_HCI;
+    event.vs_hci.ev = buf;
+    event.vs_hci.length = len;
+
+    ble_gap_event_listener_call(&event);
+}
+#endif
+
 /*****************************************************************************
  * $preempt                                                                  *
  *****************************************************************************/

nimble/host/src/ble_gap_priv.h

@@ -138,6 +138,7 @@ void ble_gap_mtu_event(uint16_t conn_handle, uint16_t cid, uint16_t mtu);
 void ble_gap_identity_event(uint16_t conn_handle);
 int ble_gap_repeat_pairing_event(const struct ble_gap_repeat_pairing *rp);
 void ble_gap_pairing_complete_event(uint16_t conn_handle, int status);
+void ble_gap_vs_hci_event(const void *buf, uint8_t len);
 int ble_gap_master_in_progress(void);
 
 void ble_gap_preempt(void);

nimble/host/src/ble_hs_hci.c

@@ -349,6 +349,20 @@ done:
     return rc;
 }
 
+#if MYNEWT_VAL(BLE_HCI_VS)
+int
+ble_hs_hci_send_vs_cmd(uint16_t ocf, const void *cmdbuf, uint8_t cmdlen,
+                       void *rspbuf, uint8_t rsplen)
+{
+    int rc;
+
+    rc = ble_hs_hci_cmd_tx(BLE_HCI_OP(BLE_HCI_OGF_VENDOR, ocf),
+                           cmdbuf, cmdlen, rspbuf, rsplen);
+
+    return rc;
+}
+#endif
+
 static void
 ble_hs_hci_rx_ack(uint8_t *ack_ev)
 {

nimble/host/src/ble_hs_hci_evt.c

@@ -38,6 +38,9 @@ static ble_hs_hci_evt_fn ble_hs_hci_evt_encrypt_change;
 static ble_hs_hci_evt_fn ble_hs_hci_evt_enc_key_refresh;
 #endif
 static ble_hs_hci_evt_fn ble_hs_hci_evt_le_meta;
+#if MYNEWT_VAL(BLE_HCI_VS)
+static ble_hs_hci_evt_fn ble_hs_hci_evt_vs;
+#endif
 
 typedef int ble_hs_hci_evt_le_fn(uint8_t subevent, const void *data,
                                  unsigned int len);
@@ -93,6 +96,9 @@ static const struct ble_hs_hci_evt_dispatch_entry ble_hs_hci_evt_dispatch[] = {
     { BLE_HCI_EVCODE_ENC_KEY_REFRESH, ble_hs_hci_evt_enc_key_refresh },
 #endif
     { BLE_HCI_EVCODE_HW_ERROR, ble_hs_hci_evt_hw_error },
+#if MYNEWT_VAL(BLE_HCI_VS)
+    { BLE_HCI_EVCODE_VS, ble_hs_hci_evt_vs },
+#endif
 };
 
 #define BLE_HS_HCI_EVT_DISPATCH_SZ \
@@ -274,6 +280,22 @@ ble_hs_hci_evt_num_completed_pkts(uint8_t event_code, const void *data,
     return 0;
 }
 
+#if MYNEWT_VAL(BLE_HCI_VS)
+static int
+ble_hs_hci_evt_vs(uint8_t event_code, const void *data, unsigned int len)
+{
+    const struct ble_hci_ev_vs *ev = data;
+
+    if (len < sizeof(*ev)) {
+        return BLE_HS_ECONTROLLER;
+    }
+
+    ble_gap_vs_hci_event(data, len);
+
+    return 0;
+}
+#endif
+
 static int
 ble_hs_hci_evt_le_meta(uint8_t event_code, const void *data, unsigned int len)
 {