Re: [lwip-devel] again... Zero Copy Ethernet interface

[Simon Goldschmidt]

> I tried to use tcp_write() without the TCP_WRITE_FLAG_COPY flag. This
> would allow zero copy transmission all the way from user code (I am not
> using sockets).
> [..]
> A better solution would be a pbuf destructor that is called when
> pbuf_free() decides to release memory.

I think an even better solution would be to have a tcp_write() function taking 
a pbuf instead of a data pointer, but that would mean the TCP frames could not 
be splitted, but it's like that today anyway. Of course after passing such a 
pbuf to tcp_write() it may not be used by the application.

Simon
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