com.mobius.software.telco.protocols.ss7.asn.primitives.ASNObjectIdentifier Maven / Gradle / Ivy

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package com.mobius.software.telco.protocols.ss7.asn.primitives;

/*
 * Mobius Software LTD
 * Copyright 2019, Mobius Software LTD and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see 
 */

/**
*
* @author yulian oifa
*
*/

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;

import io.netty.buffer.ByteBuf;

import com.mobius.software.telco.protocols.ss7.asn.ASNClass;
import com.mobius.software.telco.protocols.ss7.asn.ASNParser;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNDecode;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNEncode;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNLength;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNTag;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNValidate;
import com.mobius.software.telco.protocols.ss7.asn.exceptions.ASNParsingComponentException;
import com.mobius.software.telco.protocols.ss7.asn.exceptions.ASNParsingComponentExceptionReason;

@ASNTag(asnClass=ASNClass.UNIVERSAL,tag=6,constructed=false,lengthIndefinite=false)
public class ASNObjectIdentifier {
	private List value=new ArrayList();
	
	private String name;
	private Boolean required;
	private Boolean isRoot;
	
	//required for parser
	public ASNObjectIdentifier() {
		
	}
	
	public ASNObjectIdentifier(String name,Boolean required,Boolean isRoot) {
		this.name=name;
		this.required=required;
		this.isRoot=isRoot;
	}
	
	public ASNObjectIdentifier(List value,String name,Boolean required,Boolean isRoot) {		
		this.value=value;
		this.name=name;
		this.required=required;
		this.isRoot=isRoot;
	}
	
	@ASNLength
	public Integer getLength(ASNParser parser) {
		return getLength(value);
	}
	
	public void addOid(Long value) {
		this.value.add(value);
	}
	
	public List getValue() {
		return this.value;
	}
	
	@ASNEncode
	public void encode(ASNParser parser,ByteBuf buffer) {
		buffer.writeByte((int)(0x00FF & value.get(0) * 40 + value.get(1)));

		for (int i = 2; i < value.size(); ++i) {
			long currValue=value.get(i);
			int len = getOIDLength(currValue);

			for (int j = len - 1; j > 0; --j) {
				long m = 0x0080 | (0x007F & (currValue >> (j * 7)));
				buffer.writeByte((int) m);
			}
			
			buffer.writeByte((int) (0x007F & currValue));
		}
	}
	
	@ASNDecode
	public Boolean decode(ASNParser parser,Object parent,ByteBuf buffer,ConcurrentHashMap mappedData,Boolean skipErrors) {
		int b = 0x00FF & buffer.readByte();

		long currValue = b / 40;
		if (currValue == 0 || currValue == 1) {
			value.add(currValue);
			value.add((long)(b%40));
		} else {
			value.add(2L);
			value.add(b - 80L);
		}
		
		currValue = 0;
		while(buffer.readableBytes()>0) {
			byte b1 = buffer.readByte();
			currValue = (currValue << 7) | ((b1 & 0x7F));
			if ((b1 & 0x80) == 0x0) {
				value.add(currValue);
				currValue = 0;
			}
		}
		
		return false;
	}
	
	@ASNValidate
	public void validateElement() throws ASNParsingComponentException {
		if(required!=null && required && (value==null || value.size()==0)) {
			if(isRoot==null || !isRoot)
				throw new ASNParsingComponentException(name + " is required",ASNParsingComponentExceptionReason.MistypedParameter);
			else
				throw new ASNParsingComponentException(name + " is required",ASNParsingComponentExceptionReason.MistypedRootParameter);
		}	
	}
	
	public static int getLength(List value)
	{
		int length=1;
		for(int i=2;i arr) {
        StringBuilder sb = new StringBuilder();
        for (Long b : arr) {
            sb.append(b);
            sb.append(", ");
        }

        return sb.toString();
    }
}