/*
* returns the CSeq injected packet
* @out: packet in error case
*/
private String setCSeq(String packet, int cseq) {
if (packet == null) return null;
if (packet.indexOf(SIP_CSEQ) == -1) return packet;
int indexStart = packet.indexOf(SIP_CSEQ) + SIP_CSEQ.length();
int indexEnd = packet.indexOf(" ", indexStart);
if (indexEnd >= indexStart) {
String cseqString = new Integer(cseq).toString();
return packet.substring(0, indexStart) + cseqString + packet.substring(indexEnd);
} else return packet;
} // setCSeq
/*
* returns the CSeq from a given packet
* @param packet data to be analyse
* @return <code>-1<code> error case
* @return <code>0<code> success
*/
private int getCSeq(String packet) {
if (packet == null) return -1;
if (packet.indexOf(SIP_CSEQ) == -1) return -1;
int indexStart = packet.indexOf(SIP_CSEQ) + SIP_CSEQ.length();
// indexStart = packet.indexOf(" ", indexStart);
int indexEnd = packet.indexOf(" ", indexStart);
if (indexEnd >= indexStart) {
if (m_verbose)
System.out.println("SipStack.getCSeq: CSeq is " + packet.substring(indexStart, indexEnd));
return new Integer(packet.substring(indexStart, indexEnd)).intValue();
} else return -1;
} // getCSeq
