[SIPForum-discussion] How to handle greater Rseq values in SIP Response

[Nitin Kapoor]

Hi Sunil,

As far as reliable 1xx concerns , First 1xx must be less or equal to 2*31-1
and subsequent 1xx is not 1 greater to its predecessor than It's recommended
to drop the 1xx ( there can be out of order scenario) and do not terminate
the call. In your case, First 1xx contains the value > 2**32-1 than it is
problem of message integrity i.e. Bad msg as per grammar so just knock it
off and terminate the call.

Thanks,
Nitin Kapoor

On 16 August 2010 07:30, sipforum forme <sipnme at gmail.com> wrote:

> Hello All,
>
> I have an issue of handling Invalid Rseq value in 180-Reliable Response of
> INVITE.
>
> According to rfc 3262
>
> The value of the header field for the first reliable
> provisional response in a transaction MUST be between 1 and 2**31 - 1.
>
> My question is what should be the behaviour of client ( UAC) if it recieves
> an 180-Response with Rseq Value more than 2**31 - 1 ?
>
> Regards
> Sunil
>
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