Add on_rejected_incoming_call() callback

pjsip/include/pjsua-lib/pjsua.h

@@ -1080,6 +1080,50 @@ typedef struct pjsua_call_setting
 } pjsua_call_setting;
 
 
+/**
+ * This will contain the information of the callback \a on_rejected_incoming_call.
+ */
+typedef struct pjsua_on_rejected_incoming_call_param {
+    /** 
+     * Local URI 
+     */
+    pj_str_t        local_info;
+
+    /** 
+     * Remote URI 
+     */
+    pj_str_t        remote_info;
+
+    /** 
+     * Rejection code 
+     */
+    int             code;
+
+    /** 
+     * Original rejection message 
+     */
+    pjsip_tx_data  *tdata;
+    
+    /** 
+     * Internal.
+     */
+    struct {
+        char    local_info[PJSIP_MAX_URL_SIZE];
+        char    remote_info[PJSIP_MAX_URL_SIZE];
+    } buf_;
+
+} pjsua_on_rejected_incoming_call_param;
+
+/**
+  * Type of callback to be called when incoming call is rejected.
+  *
+  * @param param      The rejected call information.
+  *
+  */
+typedef void (*pjsua_on_rejected_incoming_call_cb)(
+                                      const pjsua_on_rejected_incoming_call_param *param);
+
+
 /**
  * This structure describes application callback to receive various event
  * notification from PJSUA-API. All of these callbacks are OPTIONAL,
@@ -1967,6 +2011,20 @@ typedef struct pjsua_callback
      */
     void (*on_media_event)(pjmedia_event *event);
 
+    /**
+     * This callback is called when an incoming call is rejected.
+     * In addition to being declined explicitly using the #pjsua_call_answer() method,
+     * the library may also automatically reject the incoming call due 
+     * to different scenarios:
+     * - when an incoming INVITE is received with, for instance, a message 
+     *   containing invalid SDP.
+     * - when issues occur during the #pjsua_call_answer() process, 
+     *   such as a failure to initialize call media.
+     * 
+     * See also #pjsua_on_rejected_incoming_call_cb.
+     */
+    pjsua_on_rejected_incoming_call_cb on_rejected_incoming_call;
+
 } pjsua_callback;
 
 

pjsip/include/pjsua-lib/pjsua_internal.h

@@ -739,6 +739,11 @@ pj_status_t pjsua_acc_get_uac_addr(pjsua_acc_id acc_id,
  */
 pj_bool_t pjsua_call_on_incoming(pjsip_rx_data *rdata);
 
+/**
+ * Handle rejected incoming call.
+ */
+void pjsua_call_on_rejected_incoming_call(pjsip_tx_data* tdata);
+
 /*
  * Media channel.
  */

pjsip/src/pjsua-lib/pjsua_call.c

@@ -2129,6 +2129,60 @@ on_return:
 }
 
 
+void pjsua_call_on_rejected_incoming_call(pjsip_tx_data *tdata)
+{
+    pjsip_msg *msg = tdata->msg;
+    pjsip_cseq_hdr *cseq;
+    int status;
+
+    if (msg->type != PJSIP_RESPONSE_MSG)
+        return;
+
+    status = msg->line.status.code / 100;
+    if (status == 1 || status == 2)
+        return;
+
+    cseq = PJSIP_MSG_CSEQ_HDR(msg);
+    if (!cseq)
+        return;
+
+    if (cseq->method.id != PJSIP_INVITE_METHOD)
+        return;
+
+    if (pjsua_var.ua_cfg.cb.on_rejected_incoming_call) {
+        pjsip_from_hdr *from_hdr;
+        pjsip_to_hdr *to_hdr;
+        pjsip_sip_uri *uri;
+        pjsua_on_rejected_incoming_call_param param;
+
+        pj_bzero(&param, sizeof(pjsua_on_rejected_incoming_call_param));
+        param.tdata = tdata;
+        param.code = msg->line.status.code;
+
+        from_hdr = PJSIP_MSG_FROM_HDR(tdata->msg);
+        if (from_hdr) {
+            param.remote_info.ptr = param.buf_.remote_info;
+            uri = (pjsip_sip_uri*)pjsip_uri_get_uri(from_hdr->uri);
+            param.remote_info.slen = pjsip_uri_print(PJSIP_URI_IN_FROMTO_HDR,
+                                                     uri,
+                                                     param.buf_.remote_info,
+                                                     sizeof(param.buf_.remote_info));
+        }
+
+        to_hdr = PJSIP_MSG_TO_HDR(tdata->msg);
+        if (to_hdr) {
+            param.local_info.ptr = param.buf_.local_info;
+            uri = (pjsip_sip_uri*)pjsip_uri_get_uri(to_hdr->uri);
+            param.local_info.slen = pjsip_uri_print(PJSIP_URI_IN_FROMTO_HDR,
+                                                     uri,
+                                                     param.buf_.local_info,
+                                                     sizeof(param.buf_.local_info));
+        }
+
+        pjsua_var.ua_cfg.cb.on_rejected_incoming_call(&param);
+    }
+}
+
 
 /*
  * Check if the specified call has active INVITE session and the INVITE

pjsip/src/pjsua-lib/pjsua_core.c

@@ -704,6 +704,18 @@ static pj_bool_t mod_pjsua_on_rx_response(pjsip_rx_data *rdata)
     return PJ_FALSE;
 }
 
+static pj_bool_t mod_pjsua_on_tx_response(pjsip_tx_data *tdata)
+{
+    PJSUA_LOCK();
+    
+    if (tdata->msg->type == PJSIP_RESPONSE_MSG) {
+        pjsua_call_on_rejected_incoming_call(tdata);
+    }
+
+    PJSUA_UNLOCK();
+    return PJ_FALSE;
+}
+
 
 /*****************************************************************************
  * Logging.
@@ -1152,7 +1164,7 @@ PJ_DEF(pj_status_t) pjsua_init( const pjsua_config *ua_cfg,
         &mod_pjsua_on_rx_request,   /* on_rx_request()                  */
         &mod_pjsua_on_rx_response,  /* on_rx_response()                 */
         NULL,                       /* on_tx_request.                   */
-        NULL,                       /* on_tx_response()                 */
+        &mod_pjsua_on_tx_response,  /* on_tx_response()                 */
         NULL,                       /* on_tsx_state()                   */
         };