LE Data Channel examples: add SM handler to accept pairing

Author: mringwal

example/le_data_channel_client.c

@@ -76,6 +76,7 @@ static bd_addr_type_t le_data_channel_addr_type;
 
 static hci_con_handle_t connection_handle;
 static btstack_packet_callback_registration_t hci_event_callback_registration;
+static btstack_packet_callback_registration_t sm_event_callback_registration;
 
 static uint8_t data_channel_buffer[TEST_PACKET_SIZE];
 
@@ -306,6 +307,34 @@ static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packe
     }
 }
 
+/*
+ * @section SM Packet Handler
+ *
+ * @text The packet handler is used to handle pairing requests
+ */
+static void sm_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
+    UNUSED(channel);
+    UNUSED(size);
+
+    if (packet_type != HCI_EVENT_PACKET) return;
+
+    switch (hci_event_packet_get_type(packet)) {
+        case SM_EVENT_JUST_WORKS_REQUEST:
+            printf("Just Works requested\n");
+            sm_just_works_confirm(sm_event_just_works_request_get_handle(packet));
+            break;
+        case SM_EVENT_NUMERIC_COMPARISON_REQUEST:
+            printf("Confirming numeric comparison: %"PRIu32"\n", sm_event_numeric_comparison_request_get_passkey(packet));
+            sm_numeric_comparison_confirm(sm_event_passkey_display_number_get_handle(packet));
+            break;
+        case SM_EVENT_PASSKEY_DISPLAY_NUMBER:
+            printf("Display Passkey: %"PRIu32"\n", sm_event_passkey_display_number_get_passkey(packet));
+            break;
+        default:
+            break;
+    }
+}
+
 #ifdef HAVE_BTSTACK_STDIN
 static void usage(const char *name){
     fprintf(stderr, "Usage: %s [-a|--address aa:bb:cc:dd:ee:ff]\n", name);
@@ -345,6 +374,9 @@ int btstack_main(int argc, const char * argv[]){
     hci_event_callback_registration.callback = &packet_handler;
     hci_add_event_handler(&hci_event_callback_registration);
 
+    sm_event_callback_registration.callback = &sm_packet_handler;
+    sm_add_event_handler(&sm_event_callback_registration);
+
     // turn on!
     hci_power_control(HCI_POWER_ON);
 

example/le_data_channel_server.c

@@ -62,7 +62,8 @@
 
 const uint16_t TSPX_le_psm = 0x25;
 
-static void  packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
+static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
+static void sm_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
 
 const uint8_t adv_data[] = {
     // Flags general discoverable, BR/EDR not supported
@@ -72,7 +73,8 @@ const uint8_t adv_data[] = {
 };
 const uint8_t adv_data_len = sizeof(adv_data);
 
-static btstack_packet_callback_registration_t hci_event_callback_registration;
+static btstack_packet_callback_registration_t event_callback_registration;
+static btstack_packet_callback_registration_t sm_event_callback_registration;
 
 // support for multiple clients
 typedef struct {
@@ -115,8 +117,12 @@ static void le_data_channel_setup(void){
     att_server_init(profile_data, NULL, NULL);    
 
     // register for HCI events
-    hci_event_callback_registration.callback = &packet_handler;
-    hci_add_event_handler(&hci_event_callback_registration);
+    event_callback_registration.callback = &packet_handler;
+    hci_add_event_handler(&event_callback_registration);
+
+    // register for SM events
+    sm_event_callback_registration.callback = &sm_packet_handler;
+    sm_add_event_handler(&sm_event_callback_registration);
 
     l2cap_register_packet_handler(&packet_handler);
 
@@ -198,7 +204,7 @@ static void streamer(void){
 
 
 /* 
- * @section Packet Handler
+ * @section HCI + L2CAP Packet Handler
  *
  * @text The packet handler is used to stop the notifications and reset the MTU on connect
  * It would also be a good place to request the connection parameter update as indicated 
@@ -318,6 +324,34 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
     }
 }
 
+/*
+ * @section SM Packet Handler
+ *
+ * @text The packet handler is used to handle pairing requests
+ */
+static void sm_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
+    UNUSED(channel);
+    UNUSED(size);
+
+    if (packet_type != HCI_EVENT_PACKET) return;
+
+    switch (hci_event_packet_get_type(packet)) {
+        case SM_EVENT_JUST_WORKS_REQUEST:
+            printf("Just Works requested\n");
+            sm_just_works_confirm(sm_event_just_works_request_get_handle(packet));
+            break;
+        case SM_EVENT_NUMERIC_COMPARISON_REQUEST:
+            printf("Confirming numeric comparison: %"PRIu32"\n", sm_event_numeric_comparison_request_get_passkey(packet));
+            sm_numeric_comparison_confirm(sm_event_passkey_display_number_get_handle(packet));
+            break;
+        case SM_EVENT_PASSKEY_DISPLAY_NUMBER:
+            printf("Display Passkey: %"PRIu32"\n", sm_event_passkey_display_number_get_passkey(packet));
+            break;
+        default:
+            break;
+    }
+}
+
 int btstack_main(void);
 int btstack_main(void)
 {