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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » javax.sip.header

Source Cross Reference Class Diagram Java Document (Java Doc)

javax.sip.header .MaxForwardsHeader

MaxForwardsHeader

public interface MaxForwardsHeader extends Header(Code)

The Max-Forwards header field must be used with any SIP method to limit the number of proxies or gateways that can forward the request to the next downstream server. This can also be useful when the client is attempting to trace a request chain that appears to be failing or looping in mid-chain.

The Max-Forwards value is an integer in the range 0-255 indicating the remaining number of times this request message is allowed to be forwarded. This count is decremented by each server that forwards the request. The recommended initial value is 70.

This header field should be inserted by elements that can not otherwise guarantee loop detection. For example, a B2BUA should insert a Max-Forwards header field.

For Example:
Max-Forwards: 6
author:
BEA Systems, NIST
version:
1.2

Field Summary
final public static String	NAME

Method Summary
public void	decrementMaxForwards() This convenience function decrements the number of max-forwards by one. This utility is useful for proxy functionality. throws: TooManyHopsException - if implementation cannot decrementmax-fowards i.e.
public boolean	equals(Object obj) Compare this MaxForwardsHeader for equality with another.
public int	getMaxForwards() Gets the maximum number of forwards value of this MaxForwardsHeader.
public void	setMaxForwards(int maxForwards) Sets the max-forwards argument of this MaxForwardsHeader to the supplied `maxForwards` value.

Field Detail

NAME
final public static String NAME(Code)
	Name of MaxForwardsHeader

Method Detail

decrementMaxForwards
public void decrementMaxForwards() throws TooManyHopsException(Code)
	This convenience function decrements the number of max-forwards by one. This utility is useful for proxy functionality. throws: TooManyHopsException - if implementation cannot decrementmax-fowards i.e. max-forwards has reached zero

equals
public boolean equals(Object obj)(Code)
	Compare this MaxForwardsHeader for equality with another. This method overrides the equals method in javax.sip.Header. This method specifies object equality as outlined by RFC3261. Two MaxForwards header fields are equivalent if their max forwards integer match. Parameters: obj - the object to compare this MaxForwardsHeader with. `true` if `obj` is an instance of this classrepresenting the same MaxForwardsHeader as this, `false` otherwise. since: v1.2

getMaxForwards
public int getMaxForwards()(Code)
	Gets the maximum number of forwards value of this MaxForwardsHeader. the maximum number of forwards of this MaxForwardsHeader

setMaxForwards
public void setMaxForwards(int maxForwards) throws InvalidArgumentException(Code)
	Sets the max-forwards argument of this MaxForwardsHeader to the supplied `maxForwards` value. Parameters: maxForwards - - the number of max-forwards throws: InvalidArgumentException - if the maxForwards argument is lessthan 0 or greater than 255.

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