private void PduReceivedEventHander(object sender, PduReceivedEventArgs e)
{
//This handler is interested in SingleDestinationPDU only
SingleDestinationPdu pdu = e.Request as SingleDestinationPdu;
if (pdu == null)
{
return;
}
//If we have just a normal message
if (((byte)pdu.EsmClass | 0xc3) == 0xc3)
{
ShortMessage message;
try { message = MessageFactory.CreateMessage(pdu); }
catch (SmppException smppEx)
{
if (VTraceSwitch.TraceError)
{
Trace.WriteLine(string.Format(
"200019:SMPP message decoding failure - {0} - {1} {2};",
smppEx.ErrorCode, new ByteBuffer(pdu.GetBytes()).DumpString(), smppEx.Message));
}
//Notify the SMSC that we encountered an error while processing the message
e.Response = pdu.CreateDefaultResponce();
e.Response.Header.ErrorCode = smppEx.ErrorCode;
return;
}
catch (Exception ex)
{
if (VTraceSwitch.TraceError)
{
Trace.WriteLine(string.Format(
"200019:SMPP message decoding failure - {0} {1};",
new ByteBuffer(pdu.GetBytes()).DumpString(), ex.Message));
}
//Let the receiver know that this message was rejected
e.Response = pdu.CreateDefaultResponce();
e.Response.Header.ErrorCode = SmppErrorCode.EsmeRxPAppn; //ESME Receiver Reject Message
return;
}
RaiseMessageReceivedEvent(message);
}
//Or if we have received a delivery receipt
else if ((pdu.EsmClass & EsmClass.DeliveryReceipt) == EsmClass.DeliveryReceipt)
{
// Extract receipted message id
var receiptedMessageIdTlv = pdu.Tlv.GetTlvByTag(Tag.ReceiptedMessageId);
string receiptedMessageId = null;
if (receiptedMessageIdTlv != null)
{
receiptedMessageId = SmppEncodingUtil.GetCStringFromBytes(receiptedMessageIdTlv.RawValue);
}
RaiseMessageDeliveredEvent(receiptedMessageId);
}
}
/// <summary>
/// Creates a <see cref="TextMessage"/> from a received <see cref="SingleDestinationPdu"/>
/// </summary>
/// <param name="pdu">The PDU from which a <see cref="TextMessage"/> is constructed</param>
/// <returns>A <see cref="TextMessage"/> represening a text message extracted from the received PDU</returns>
public static TextMessage CreateMessage(SingleDestinationPdu pdu)
{
//This version supports only text messages
Udh udh = null;
string message = null;
pdu.GetMessageText(out message, out udh);
TextMessage sms = null;
//Check if the udh field is present
if (udh != null)
{
sms = new TextMessage(udh.SegmentId, udh.MessageCount, udh.MessageSequence);
}
else
{
sms = new TextMessage();
}
sms.Text = message == null ? "" : message;
sms.SourceAddress = pdu.SourceAddress.Address;
sms.DestinationAddress = pdu.DestinationAddress.Address;
return(sms);
}