Re: [lwip-users]send/receive urgent tcp-data

[Bob]

Am 30.10.2009, 18:16 Uhr, schrieb address@hidden <address@hidden>:

> Bob Brusa wrote:
> > Hi
> > I have written a tiny lwip-based server-ap that sends and receives tcp   
> > packages.
> >
> > When receiving data - how can I find out if this are normal or urgent   
> > data? (or OOB=out of band data, as MS calls them).
> > Similarely: How can I send a tcp-package with the urg-flag set?
> > Thanks and best regards Robert
> Unfortunately, lwIP currently does not process the urgent flag. The flag  
> is present in the TCP header, but as there is no way to access the  
> header in your recv callback, there's no way to get the TCP flags from  
> that header.
>
> Tx side is similar: lwIP creates the TCP header itself (cannot be  
> directly influenced by the application) and there's currently no way to  
> create a segment with the urgent flag.
>
> Simon
Hi Simon and Kieran
You confirm my "suspicion". I just was not sure, if I missed something.  
Thanks for the info and have a nice weekend.
Robert