[lwip-users] Re: [lwip] uIP: writev() and tap

[Felipe Massia Pereira]

Hello, Adam!

On Fri, 22 Feb 2002, Adam Dunkels wrote:
> The writev will gather the two pieces of data in a single write() since the 
> headers and data can be from different places in memory. There is a bug in 
> Linux < 2.4.18 that makes writev() on a tapdev misbehave. Eddie C. Dost 
> reported this uIP bug a few days ago and also sent in a bug report to Linus 
> so that upcoming Linux versions will work better with writev() and the tap 
> device.

I'm sorry for the duplicate report.

> The simplest workaround is just to copy the data into a new buffer and do a 
> write() on that buffer:
> 
> #ifdef linux
>   {
>     char tmpbuf[UIP_BUFSIZE];
>     int i;

I did something like this and it's working perfectly now!

thanks!
Felipe

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