Re: Problem with WAP-Gateway/File sizes

Robert Hassing wrote:
> 
> Hi All,
> 
> I have this problem with the WAP gateway I did setup.
> 
> The problem is that a maximum of 254/255 packets can be send concerning 1
> file.
> This means that if I want to download a file with a size higher as 143KB the
> transmission fails :-(
> 
> The error I got is the following:
> 
> In wapbox.log:
> PANIC: gwlib/octstr.c:1677: octstr_set_bits: Assertion `value <= mask'
> failed.
> 
> And in bearerbox.log:
> 2003-11-19 16:13:55 [7] ERROR: Couldn't send UDP packet
> 2003-11-19 16:13:55 [7] ERROR: System error 90: Message too long
> 2003-11-19 16:13:55 [7] ERROR: WDP/UDP: could not send UDP datagram
> 2003-11-19 16:14:05 [7] ERROR: Couldn't send UDP packet
> 
> Is there a possibility to download files which are bigger as appr. 143KB????

Robert, please don't cross-post to different mailing lists, we
consider this annoying! ;)

ok, know regarding the size limitation. 

You are correct, Kannel implements WAP 1.2.1 features WTP-SAR
(segmentation and reassembly), which means a maximum of 256 segments
can be bound to one logical transmission.

We would need a beast called ESAR (extended SAR) for having the
ability to pass "bigger chunks".

This is known to be a "missing" feature, also for future aspects (ie.
for WAP GW proxying of big MMS) etc.

Patches and contributions are highly welcome! -- you may consider
contacting the contributor of our WTP-SAR implementation and ask him
kindly if he has time and willing to contribute ESAR. See mailing list
archive for his email address.

Stipe

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