fix issue that rru cannot release ue if doing attach/detach in nfapi mode

nfapi/open-nFAPI/vnf/public_inc/nfapi_vnf_interface.h

@@ -988,6 +988,15 @@ int nfapi_vnf_p7_lbt_dl_config_req(nfapi_vnf_p7_config_t* config, nfapi_lbt_dl_c
  */
 int nfapi_vnf_p7_vendor_extension(nfapi_vnf_p7_config_t* config, nfapi_p7_message_header_t* msg);
 
+/*! Send the RELEASE_RNTI.request
+ *  \param config A pointer to the vnf p7 configuration
+ *  \param req A data structure for the decoded RELEASE_RNTI.request.
+ *  \return A status value. 0 equal success, -1 indicates failure
+ *
+ *  The caller is responsiable for memory management of any pointers set in the req, which
+ *  may be released after this function call has returned or at a later pointer
+ */
+int nfapi_vnf_p7_ue_release_req(nfapi_vnf_p7_config_t* config, nfapi_ue_release_request_t* req);
 #if defined(__cplusplus)
 }
 #endif

nfapi/open-nFAPI/vnf/src/vnf_p7.c

@@ -822,6 +822,28 @@ void vnf_handle_nrach_indication(void *pRecvMsg, int recvMsgLen, vnf_p7_t* vnf_p
 	}
 }
 
+void vnf_handle_ue_release_resp(void *pRecvMsg, int recvMsgLen, vnf_p7_t* vnf_p7)
+{
+
+	// ensure it's valid
+	if (pRecvMsg == NULL || vnf_p7 == NULL)
+	{
+		NFAPI_TRACE(NFAPI_TRACE_ERROR, "%s: NULL parameters\n", __FUNCTION__);
+	}
+	else
+	{
+		nfapi_ue_release_response_t resp;
+
+		if(nfapi_p7_message_unpack(pRecvMsg, recvMsgLen, &resp, sizeof(resp), &vnf_p7->_public.codec_config) < 0)
+		{
+			NFAPI_TRACE(NFAPI_TRACE_ERROR, "%s: Failed to unpack message\n", __FUNCTION__);
+		}
+
+
+		vnf_p7_codec_free(vnf_p7, resp.vendor_extension);
+	}
+}
+
 void vnf_handle_p7_vendor_extension(void *pRecvMsg, int recvMsgLen, vnf_p7_t* vnf_p7, uint16_t message_id)
 {
 	if (pRecvMsg == NULL || vnf_p7 == NULL)
@@ -1334,6 +1356,10 @@ void vnf_dispatch_p7_message(void *pRecvMsg, int recvMsgLen, vnf_p7_t* vnf_p7)
 			vnf_handle_nrach_indication(pRecvMsg, recvMsgLen, vnf_p7);
 			break;			
 
+		case NFAPI_UE_RELEASE_RESPONSE:
+			vnf_handle_ue_release_resp(pRecvMsg, recvMsgLen, vnf_p7);
+			break;
+
 		default:
 			{
 				if(header.message_id >= NFAPI_VENDOR_EXT_MSG_MIN &&

nfapi/open-nFAPI/vnf/src/vnf_p7_interface.c

@@ -523,6 +523,14 @@ int nfapi_vnf_p7_vendor_extension(nfapi_vnf_p7_config_t* config, nfapi_p7_messag
 	return vnf_p7_pack_and_send_p7_msg(vnf_p7, header);
 }
 
+int nfapi_vnf_p7_ue_release_req(nfapi_vnf_p7_config_t* config, nfapi_ue_release_request_t* req)
+{
+    if(config == 0 || req == 0)
+        return -1;
+
+    vnf_p7_t* vnf_p7 = (vnf_p7_t*)config;
+    return vnf_p7_pack_and_send_p7_msg(vnf_p7, &req->header);
+}
 
 int nfapi_vnf_p7_release_msg(nfapi_vnf_p7_config_t* config, nfapi_p7_message_header_t* header)
 {