Re: [lwip-users] lwip does not ack retransmissions

[Jonathan Larmour]

bill wrote:
> What is your TCP_SND_QUEUELEN?  If you tie up all of your pbufs to send
> queued packets, you won't have any pbufs left to support receiving packets.

It mostly depends what sort of pbufs. Most pbufs for tx data are PBUF_RAM,
most pbufs for rx data are PBUF_POOL, so those are different classes of
pbufs allocated from different places. The only likely time it seems
possible to have problems with reception if you've allocated so many
PBUF_RAM pbufs that the stack can't even generate an ACK packet. Unless you
are actually allocating PBUF_POOL pbufs in your application or something
like that, of course.

Jifl
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