LDicomNet::SendCEchoRequest

#include "ltdic.h"

L_INT LDicomNet::SendCEchoRequest(nPresentationID, nMessageID, pszClass)

L_UCHAR nPresentationID;	/* presentation ID */
L_UINT16 nMessageID;	/* message ID */
L_TCHAR * pszClass;	/* class type */

Sends a C-ECHO-REQ message to a peer member of a connection. This function is available in the PACS Imaging Toolkit.

Parameter	Description
nPresentationID	Presentation ID. The presentation ID provides information about both the class type of the data and the transfer syntax to use when transferring the data.
nMessageID	Message ID. Each message sent by a member of a connection should have a unique ID. Since a member of a connection may send several messages, this ID allows that member to identify when a specific request has been completed.
pszClass	Class affected by the request. This will be an SOP Class or an SOP MetaClass.

Returns

0	SUCCESS
>0	An error occurred. Refer to Return Codes.

Comments

Calling this function generates a call to LDicomNet::OnReceiveCEchoRequest on the SCP. The SCP should respond by calling LDicomNet::SendCEchoResponse which will generate a call to LDicomNet::OnReceiveCEchoResponse.

Required DLLs and Libraries

LTDIC

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

See Also

Functions:	LDicomNet::SendCEchoResponse, LDicomNet::OnReceiveCEchoRequest, LDicomNet::OnReceiveCEchoResponse
Topics:	Working with DICOM Network Connections

Example

L_INT LDicomNet__SendCEchoRequestExample(LMyDicomNet *m_pDicomNet)
{
   //This example sends an Echo Request Command to the server
   //In this example:
   //
   //1. LMyDicomNet is a class derived from LDicomNet
   //2. LMyDicomNet has the following member variables:
   //       m_nClientOrServer:  can be (STATUS_NONE, STATUS_SERVER, STATUS_CLIENT)
   //                           identifieds the LMyDicomNet object as a server or a client
   //       m_nDataCommand:     can be (COMMAND_C_MOVE,COMMAND_C_GET) 
   //                           set so the server knows how a C-Store Response was generated
   //
   //3. m_pDicomNet points to a valid LMyDicomNet object
   //      LMyDicomNet *m_pDicomNet
   // 
   //4. A connection exists between client and server
   //5. An association exists between the client and server
   L_INT nRet;
   CString strMsg= TEXT("C-Echo\n");
   //Is class supported in the assocation?
   L_UCHAR nPresentationID = m_pDicomNet->GetAssociate()->FindAbstract(UID_VERIFICATION_CLASS);
   //nPresentationID must be odd--if 0, indicates failure
   if (nPresentationID==0)
   {
      CString strTmp;
      strTmp.Format(TEXT("Abstract Syntax[%s] Not Included in the Association"), UID_VERIFICATION_CLASS);
      strMsg = strMsg + strTmp;
   }
   else 
   //success
   {
      L_UINT16 uUniqueID = 99;
      nRet =m_pDicomNet->SendCEchoRequest(nPresentationID, uUniqueID, UID_VERIFICATION_CLASS);
      if(nRet > 0)
         return nRet;
   }
  AfxMessageBox(strMsg);
  return DICOM_SUCCESS;
   }