javax.sip.header.RequireHeader Maven / Gradle / Ivy
/**
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Unpublished - rights reserved under the Copyright Laws of the United States.
* Copyright � 2003 Sun Microsystems, Inc. All rights reserved.
* Copyright � 2005 BEA Systems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* This distribution may include materials developed by third parties.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* Module Name : JSIP Specification
* File Name : RequireHeader.java
* Author : Phelim O'Doherty
*
* HISTORY
* Version Date Author Comments
* 1.1 08/10/2002 Phelim O'Doherty
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
package android.javax.sip.header;
/**
* The Require header field is used by UACs to tell UASs about options that
* the UAC expects the UAS to support in order to process the request.
* Although an optional header field, the Require MUST NOT be ignored if it
* is present.
*
* The Require header field contains a list of option tags. Each option tag
* defines a SIP extension that MUST be understood to process the request.
* Frequently, this is used to indicate that a specific set of extension
* header fields need to be understood. A UAC compliant to this specification
* MUST only include option tags corresponding to standards-track RFCs.
*
* If a server does not understand the option, it must respond by returning a
* BAD_EXTENSION Response and list those options it does not understand in
* the UnsupportedHeader.
*
* Proxy and redirect servers must ignore features that are not understood. If
* a particular extension requires that intermediate devices support it, the
* extension must be tagged in the ProxyRequireHeader as well.
*
* For Example:
* Require: 100rel
*
* @see ProxyRequireHeader
* @see OptionTag
* @author BEA Systems, NIST
* @version 1.2
*/
public interface RequireHeader extends OptionTag, Header {
/**
* Name of RequireHeader
*/
public final static String NAME = "Require";
}