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 /*
  * JBoss, Home of Professional Open Source
  * This code has been contributed to the public domain.
  * 
  * This software is provided by NIST as a service and is expressly
  * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
  * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
  * AND DATA ACCURACY.  NIST does not warrant or make any representations
 * regarding the use of the software or the results thereof, including but
 * not limited to the correctness, accuracy, reliability or usefulness of
 * the software.
 *
 * Permission to use this software is contingent upon your acceptance
 * of the terms of this agreement.
 */
package gov.nist.javax.sip;

Author(s):
jean.deruelle@gmail.com
public interface UtilsExt {

    
Generate a call identifier. This is useful when we want to generate a call identifier in advance of generating a message.

Since:
2.0
    public String generateCallIdentifier(String address);

    
Generate a tag for a FROM header or TO header. Just return a random 4 digit integer (should be enough to avoid any clashes!) Tags only need to be unique within a call.

Returns:
a string that can be used as a tag parameter. synchronized: needed for access to 'rand', else risk to generate same tag twice
Since:
2.0
    public String generateTag();
    
Generate a cryptographically random identifier that can be used to generate a branch identifier.

Returns:
a cryptographically random gloablly unique string that can be used as a branch identifier.
Since:
2.0
    public String generateBranchId();
    
    
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