package ie.omk.smpp.message;
import ie.omk.smpp.Address;
import ie.omk.smpp.util.GSMConstants;
import ie.omk.smpp.util.SMPPIO;
import java.io.OutputStream;
/**
* Transfer data between the SC and an ESME. This message type is used to
* transfer data both by the SMSC and the ESME. The command can be used as a
* replacement for both submit_sm and deliver_sm. Relevant inherited fields from
* SMPPPacket: <br>
* <ul>
* serviceType <br>
* source <br>
* destination <br>
* esmClass <br>
* registered <br>
* dataCoding <br>
* </ul>
*
* @author Oran Kelly
* @version 1.0
*/
public class DataSM extends ie.omk.smpp.message.SMPPRequest {
/**
* Construct a new DataSM
*/
public DataSM() {
super(DATA_SM);
}
/**
* Construct a new DataSM with specified sequence number.
*
* @param seqNum
* The sequence number to use
* @deprecated
*/
public DataSM(int seqNum) {
super(DATA_SM, seqNum);
}
/**
* Return the number of bytes this packet would be encoded as to an
* OutputStream.
*
* @return the number of bytes this packet would encode as.
*/
public int getBodyLength() {
int len = ((serviceType != null) ? serviceType.length() : 0)
+ ((source != null) ? source.getLength() : 3)
+ ((destination != null) ? destination.getLength() : 3);
// 3 1-byte integers, 1 c-string
return len + 4;
}
/**
* Write a byte representation of this packet to an OutputStream
*
* @param out
* The OutputStream to write to
* @throws java.io.IOException
* If an error occurs writing to the output stream.
*/
protected void encodeBody(OutputStream out) throws java.io.IOException {
SMPPIO.writeCString(serviceType, out);
if (source != null) {
source.writeTo(out);
} else {
// Write ton=0(null), npi=0(null), address=\0(nul)
new Address(GSMConstants.GSM_TON_UNKNOWN,
GSMConstants.GSM_NPI_UNKNOWN, "").writeTo(out);
}
if (destination != null) {
destination.writeTo(out);
} else {
// Write ton=0(null), npi=0(null), address=\0(nul)
new Address(GSMConstants.GSM_TON_UNKNOWN,
GSMConstants.GSM_NPI_UNKNOWN, "").writeTo(out);
}
SMPPIO.writeInt(esmClass, 1, out);
SMPPIO.writeInt(registered, 1, out);
SMPPIO.writeInt(dataCoding, 1, out);
}
public void readBodyFrom(byte[] body, int offset)
throws SMPPProtocolException {
// First the service type
serviceType = SMPPIO.readCString(body, offset);
offset += serviceType.length() + 1;
source = new Address();
source.readFrom(body, offset);
offset += source.getLength();
destination = new Address();
destination.readFrom(body, offset);
offset += destination.getLength();
// ESM class, protocol Id, priorityFlag...
esmClass = SMPPIO.bytesToInt(body, offset++, 1);
// Registered delivery, data coding
registered = SMPPIO.bytesToInt(body, offset++, 1);
dataCoding = SMPPIO.bytesToInt(body, offset++, 1);
}
/**
* Convert this packet to a String. Not to be interpreted programmatically,
* it's just dead handy for debugging!
*/
public String toString() {
return new String("data_sm");
}
}