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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Unpublished - rights reserved under the Copyright Laws of the United States.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 : Author : Phelim O'Doherty HISTORY Version Date Author Comments 1.1 08/10/2002 Phelim O'Doherty ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
package javax.sip.header;

The Record-Route header field is inserted by proxies in a request to force future requests in the dialog to be routed through the proxy. The SipProvider (as opposed to the application) should attach Record-Route headers to messages explicitly when forwarding them if necessary.

The RecordRouteHeader is added to a Request by any proxy that insists on being in the path of subsequent Requests for the same call leg. It contains a globally reachable RequestURI that identifies the proxy server. Each proxy server adds its Address URI to the beginning of the list.

The calling user agent client copies the RecordRouteHeaders into RouteHeaders of subsequent Requests within the same call leg, reversing the order, so that the first entry is closest to the user agent client. If the Response contained a ContactHeader field, the calling user agent adds its content as the last RouteHeader. Unless this would cause a loop, a client must send subsequent Requests for this call leg to the Address URI in the first RouteHeader and remove that entry.

Some proxies, such as those controlling firewalls or in an automatic call distribution (ACD) system, need to maintain call state and thus need to receive any BYE and ACK Requests for the call.

For Example:

BEA Systems, NIST
See also:
public interface RecordRouteHeader extends HeaderAddressParametersHeader {

Name of RecordRouteHeader
    public final static String NAME = "Record-Route";
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