[lwip-users] Re: [lwip] who/what frees pbufs on output

[Kieran Mansley]

On Fri, 4 Oct 2002, Dirk Koopman wrote:

> I remain somewhat confused as to where a pbuf that is output is freed.
>
> Is it after the tcp/udp_send at application level, or is it in the
> netif->output(....) routine?

tcp_output(), just after the call to ip_output()

> I ask this because ICMP echo seems to accept incoming pings, massages
> the pbuf a bit to return it, then sends it back. The problem is that,
> currently, I can't see where the pbuf used is freed.

ICMP could well be bypassing the above, so you could have found a leak.
I'm not sure how well tested ICMP is.

Kieran

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