RE: Parameter Padding Question

		SIGTRAN community

> 	I am hoping you can help me out with a matter of interpreting a
> section that is generating some confusion within my group
> 
> 	Specifically a part from Section 3.2
> 
> 	Parameter Value: variable length. 
> 	The Parameter Value field contains the actual information to be
> transferred in the parameter. The total length of a parameter
> (including Tag, Parameter Length and Value fields) MUST be a multiple
> of 4 bytes. If the length of the parameter is not a multiple of 4
> bytes, the sender pads the Parameter at the end (i.e., after the
> Parameter Value field) with all zero bytes. The length of the padding
> is NOT included in the parameter length field. A sender SHOULD NOT pad
> with more than 3 bytes. The receiver MUST ignore the padding bytes. 
> 
> 	My question is, if non-zero padding values are used within the
> parameter value, is this still considered a valid message? Based on
> the parameter length value we are able to extract the parameter itself
> from the message irregardless of the padding. And while the spec calls
> for zero bytes to be used, it also states that the padding bytes MUST
> be ignored. 
> 
> 	Is the receiver expected to extract a parameter even if the
> padding bytes are not zero (i.e. ignore the padding bytes) , or should
> the message be rejected as invalid (as the padding is non-zero)
> 
> 	I hope you can help
> 
> 	Thanks
> 
> Kelly McDonald BSc. 
> USP GNPS Team Lead
> ESN: 395-1467 
> External: 613-765-1467 
> [email protected]
> [email protected] 
> 
>

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