Re: [lwip-users] tcp_write with zero-copy

[Prateek Jain]

I don't have much idea about PBUF_TRANSPORT and stuff. But I have used tcp_write with zero copy. It works perfectly fine. I used lwip 1.1.0

 

iErr = tcp_write(pDatapcb,
       gBuf + giBytesRead,
       iBytes2Write,
       0);

 

With it, I could send 3 MB of data.

 

Regards,

Prateek

 

 

On 11/1/05, Sathya Thammanur <address@hidden> wrote:

Sorry Christian for the email. Has anyone tried true zero-copy for the RAW API mode? Are there changes needed in lwIP to get this working?

Thanks,

Sathya

On 11/1/05, Christiaan Simons <address@hidden > wrote:

Sathya Thammanur < address@hidden> wrote on 31-10-2005 18:40:32:

> Does this mean that true zero-copy is not supported by lwIP? I have
> seen issues with zero-copy and I was wondering if this is the case.

This isn't advertised anywhere as far as I know. I cannot tell for sure,
but I believe it was not one of Adam's design goals. Some users
may have tried to implement zero-copy.

Please post these questions to the lwip-users list.

Christiaan Simons

Hardware / Software Engineer
Axon Digital Design

+31 (0)13 511 66 66
+31 (0)13 511 41 51

http://www.axon.tv

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