hfp: add HF hangup call

src/hfp.h

@@ -538,6 +538,7 @@ typedef struct hfp_connection {
     hfp_hf_query_operator_state_t hf_query_operator_state;
     uint8_t hf_answer_incoming_call;
     uint8_t hf_send_clip_enable;
+    uint8_t hf_send_chup;
 
 } hfp_connection_t;
 

src/hfp_hf.c

@@ -242,6 +242,12 @@ static int hfp_hf_send_clip_enable(uint16_t cid){
     return send_str_over_rfcomm(cid, buffer);
 }
 
+static int hfp_hf_send_chup(uint16_t cid){
+    char buffer[20];
+    sprintf(buffer, "AT%s\r\n", HFP_HANG_UP_CALL);
+    return send_str_over_rfcomm(cid, buffer);
+}
+
 static void hfp_emit_ag_indicator_event(hfp_callback_t callback, int status, hfp_ag_indicator_t indicator){
     if (!callback) return;
     uint8_t event[6+HFP_MAX_INDICATOR_DESC_SIZE+1];
@@ -339,13 +345,6 @@ static int hfp_hf_run_for_context_service_level_connection_queries(hfp_connectio
         return done;
     }
 
-    if (context->hf_send_clip_enable){
-        context->hf_send_clip_enable = 0;
-        context->ok_pending = 1;
-        hfp_hf_send_clip_enable(context->rfcomm_cid);
-        return 1;
-    }
-
     switch (context->hf_query_operator_state){
         case HFP_HF_QUERY_OPERATOR_SET_FORMAT:
             context->hf_query_operator_state = HFP_HF_QUERY_OPERATOR_W4_SET_FORMAT_OK;
@@ -476,6 +475,20 @@ static void hfp_run_for_context(hfp_connection_t * context){
         done = call_setup_state_machine(context);
     }
     
+    if (context->hf_send_clip_enable){
+        context->hf_send_clip_enable = 0;
+        context->ok_pending = 1;
+        hfp_hf_send_clip_enable(context->rfcomm_cid);
+        return;
+    }
+
+    if (context->hf_send_chup){
+        context->hf_send_chup = 0;
+        context->ok_pending = 1;
+        hfp_hf_send_chup(context->rfcomm_cid);
+        return;
+    }
+
     if (done) return;
     // deal with disconnect
     switch (context->state){ 
@@ -834,6 +847,13 @@ void hfp_hf_answer_incoming_call(bd_addr_t bd_addr){
     // }
 }
 
+void hfp_hf_terminate_call(bd_addr_t bd_addr){
+    hfp_hf_establish_service_level_connection(bd_addr);
+    hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr);
+    connection->hf_send_chup = 1;
+    hfp_run_for_context(connection);
+}
+
 void hfp_hf_enable_calling_line_identification(bd_addr_t bd_addr){
     hfp_hf_establish_service_level_connection(bd_addr);
     hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr);

src/hfp_hf.h

@@ -84,7 +84,6 @@ void hfp_hf_register_packet_handler(hfp_callback_t callback);
  */
 void hfp_hf_establish_service_level_connection(bd_addr_t bd_addr);
 
-
 /**
  * @brief Release the RFCOMM channel and the audio connection between the HF and the AG. 
  * TODO: trigger release of the audio connection
@@ -155,6 +154,11 @@ void hfp_hf_release_audio_connection(bd_addr_t bd_addr);
  */
 void hfp_hf_answer_incoming_call(bd_addr_t bd_addr);
 
+/**
+ * @brief 
+ */
+void hfp_hf_terminate_call(bd_addr_t bd_addr);
+
 /**
  * @brief 
  */

test/pts/hfp_hf_test.c

@@ -109,6 +109,7 @@ static void show_usage(void){
     printf("e - disable reporting of the extended AG error result code\n");
     
     printf("f - answer incoming call\n");
+    printf("F - Hangup call\n");
 
     printf("g - query network operator name\n");
     printf("h - enable Calling Line Identification.\n");
@@ -166,6 +167,10 @@ static int stdin_process(struct data_source *ds){
             printf("Answer incoming call.\n");
             hfp_hf_answer_incoming_call(device_addr);
             break;
+        case 'F':
+            printf("Hangup call.\n");
+            hfp_hf_terminate_call(device_addr);
+            break;
         case 'g':
             printf("Query operator.\n");
             hfp_hf_query_operator_selection(device_addr);