/protocols/ss7/mtp/mtp-api/src/main/java/org/mobicents/protocols/ss7/mtp/Mtp3TransferPrimitive.java

/*

 * JBoss, Home of Professional Open Source

 * Copyright 2011, Red Hat, Inc. and individual contributors

 * by the @authors tag. See the copyright.txt in the distribution for a

 * full listing of individual contributors.

 *

 * This is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This software is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this software; if not, write to the Free

 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.

 */



package org.mobicents.protocols.ss7.mtp;



/**

 * @author sergey vetyutnev

 * 

 */

public class Mtp3TransferPrimitive {



	protected int si; // service indicator

	protected int ni; // network indicator

	protected int mp; // message priority

	protected int opc;

	protected int dpc;

	protected int sls;

	protected byte[] data;



	public Mtp3TransferPrimitive() {

	}



	public Mtp3TransferPrimitive(int si, int ni, int mp, int opc, int dpc, int sls, byte[] data) {

		this.si = si;

		this.ni = ni;

		this.mp = mp;

		this.opc = opc;

		this.dpc = dpc;

		this.sls = sls;

		this.data = data;

	}

	

	public int getSi() {

		return this.si;

	}



	public int getNi() {

		return this.ni;

	}



	public int getMp() {

		return this.mp;

	}



	public int getOpc() {

		return this.opc;

	}



	public int getDpc() {

		return this.dpc;

	}



	public int getSls() {

		return this.sls;

	}



	public byte[] getData() {

		return this.data;

	}



	public void setSi(int si) {

		this.si = si;

	}



	public void setNi(int ni) {

		this.ni = ni;

	}



	public void setMp(int mp) {

		this.mp = mp;

	}



	public void setOpc( int opc ) {

		this.opc = opc;

	}



	public void setDpc( int dpc ) {

		this.dpc = dpc;

	}



	public void setSls( int sls ) {

		this.sls = sls;

	}



	public void setData(byte[] data) {

		this.data = data;

	}





	public void decodeMtp3(byte[] msg) {



		// sio

		int sio = msg[0];

		this.si = sio & 0x0F;

		int ssi = (sio & 0xF0) >> 4;

		this.ni = ssi >> 2;

		this.mp = ssi & 0x03;



		// routing label

		byte b1 = msg[1];

		byte b2 = msg[2];

		byte b3 = msg[3];

		byte b4 = msg[4];

		this.dpc = ((b2 & 0x3f) << 8) | (b1 & 0xff);

		this.opc = ((b4 & 0x0f) << 10) | ((b3 & 0xff) << 2) | ((b2 & 0xc0) >> 6);

		this.sls = ((b4 & 0xf0) >> 4);



		// msu data

		this.data = new byte[msg.length - 5];

		System.arraycopy(msg, 5, this.data, 0, this.data.length);

	}



	public byte[] encodeMtp3() {



		byte[] res = new byte[this.data.length + 5];



		// sio

		int ssi = (this.ni & 0x03) << 2 | (this.mp & 0x03);

		res[0] = (byte) (((ssi & 0x0F) << 4) | (this.si & 0x0F));

		

		// routing label

		res[1] = (byte) dpc;

		res[2] = (byte) (((dpc >> 8) & 0x3F) | ((this.opc & 0x03) << 6));

		res[3] = (byte) (this.opc >> 2);

		res[4] = (byte) (((this.opc >> 10) & 0x0F) | ((sls & 0x0F) << 4));



		// msu data

		System.arraycopy(this.data, 0, res, 5, this.data.length);



		return res;

	}

	

	@Override

	public String toString() {



		StringBuilder sb = new StringBuilder();

		sb.append("MTP-TRANSFER: OPC=");

		sb.append(this.opc);

		sb.append(", DPC=");

		sb.append(this.dpc);

		sb.append(", SLS=");

		sb.append(this.sls);



		if (this.data != null) {

			sb.append(", MsgLen=");

			sb.append(this.data.length);

		}

		

		sb.append(", NI=");

		switch (this.ni) {

		case 0:

			sb.append("National");

			break;

		case 1:

			sb.append("NationalSpare");

			break;

		case 2:

			sb.append("International");

			break;

		case 3:

			sb.append("InternationalSpare");

			break;

		default:

			sb.append(this.ni);

			break;

		}



		sb.append(", SI=");

		switch (this.si) {

		case 0:

			sb.append("SNMM");

			break;

		case 1:

			sb.append("SNTMM");

			break;

		case 2:

			sb.append("SNTMM Special");

			break;

		case 3:

			sb.append("SCCP");

			break;

		case 4:

			sb.append("TUP");

			break;

		case 5:

			sb.append("ISDN");

			break;

		case 6:

			sb.append("DUP-1");

			break;

		case 7:

			sb.append("DUP-1");

			break;

		case 8:

			sb.append("MTP Testing");

			break;

		case 9:

			sb.append("Broadband ISDN");

			break;

		case 10:

			sb.append("Satellite ISDN");

			break;

		default:

			sb.append(this.si);

			break;

		}



		sb.append(", MP=");

		sb.append(this.mp);



		return sb.toString();

	}

}