Re: [lwip-users] Re: lwip-users Digest, Vol 67, Issue 11

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Chen schrieb:
> I believe it is 1.3 since the soure codes have many reference for 
> 1.3.6.1.2.1.xx (which definition should I search to be absolutely sure?)
1.3.6.1.2.1.xx??? Where's that from? Unfortunately, there is still no 
version in the sources. It's a new "feature" just added in CVS HEAD.
> Where to acquire the latest?
http://savannah.nongnu.org/projects/lwip/ -> Download


> I am confused:
>
*> "#define* PBUF_POOL_BUFSIZE       500" is not the packet size (I can 
see packet of 1460 bytes from Wireshark), how does it affect the tx buffer?

Each buffer is 500 bytes long. A packet of 1460 bytes TCP data (plus 
some headers, 1514 bytes totally) is thus made up of 4 pbufs from the 
pool *if* these are used. For transmitting, PBUF_RAM is used, which is 
allocated from the heap, the size of which is define with the define 
MEM_SIZE (in bytes).

Simon