423         Header udpHeader;  in SendDatagram()  local
425         udpHeader.SetSourcePort(aMessageInfo.mSockPort);  in SendDatagram()
426         udpHeader.SetDestinationPort(aMessageInfo.mPeerPort);  in SendDatagram()
427         udpHeader.SetLength(sizeof(udpHeader) + aMessage.GetLength());  in SendDatagram()
428         udpHeader.SetChecksum(0);  in SendDatagram()
430         SuccessOrExit(error = aMessage.Prepend(udpHeader));  in SendDatagram()
443     Header udpHeader;  in HandleMessage()  local
445     SuccessOrExit(error = aMessage.Read(aMessage.GetOffset(), udpHeader));  in HandleMessage()
451     aMessage.MoveOffset(sizeof(udpHeader));  in HandleMessage()
452     aMessageInfo.mPeerPort = udpHeader.GetSourcePort();  in HandleMessage()
453     aMessageInfo.mSockPort = udpHeader.GetDestinationPort();  in HandleMessage()