RE: [lwip-users] Sending UDP

[Goldschmidt Simon]

> I know i should not change the pointer, the code was what i 
> would LIKE to do so i dont have to copy data from a fixed 
> buffer to another fixed buffer.
> 
> can i change the pointer if i do something like
> 
>   newBufHeader = pbuf_alloc( PBUF_TRANSPORT, 0, PBUF_RAM);
>   newBuf = pbuf_alloc( PBUF_TRANSPORT, 1324, PBUF_REF);
>   chain( newBufHeader, newBuf);
>   while( bytesToSend)
>   {
>     newBuf->payload = currentBufferPointer);
>     udp_send( outUdp, newBuf);
>     currentBufferPointer += 1324;
>     bytesToSend -= 1324;
>   }
>   pbuf_free( newBuf);

udp_send() can cope with PBUF_REF pbufs and allocates the PBUF_RAM space
for the header on its own, so no need to chain them yourself!


Simon