Limitation of nonStandardData and other issues related to H.450
Paul Long
plong at SMITHMICRO.COM
Wed Dec 3 15:30:52 EST 1997
Karl Klaghofer wrote:
[snip]
> ExtensionSeq ::= SEQUENCE OF Extension{{ExtensionSet}}
[snip]
> argumentExtension CHOICE
> {extensionSeq ExtensionSeq,
> nonStandardData SEQUENCE OF NonStandardParameter } OPTIONAL
[snip]
> argumentExtension SEQUENCE OF MixedExtension OPTIONAL
Hey, it's really bad ASN.1 form to leave SEQUENCE OFs and SET OFs
unconstrained. The receiver has no idea how to size internal buffers.
This is especially critical for embbeded systems. Please provide a
sensible size constraint for all aggregate fields. For example,
SEQUENCE SIZE (0..255) OF
or even
SEQUENCE SIZE (0..65535) OF
--
Paul Long___________________________http://www.cmpu.net/public/plong
Smith Micro Software, Inc.__________http://www.smithmicro.com/
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