Please read doc/rawapi.txt where this is documented.
Noam, I'm a bit confused. The PCB passed to the recv callback should be the
one passed to tcp_recved. To handle the listen callback, this is different...
Simon
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Am 27. Juni 2016 5:31:01 nachm. schrieb Noam Weissman <[email protected]>:
Hi,
You need to call pbuf_free(pcb) after you finish processing the data.
Also you need to call tcp_recived after you handled the data. You call it NOT
with the pcb that you get inside the recv call back but rather your SERVER pcb.
The one created after calling listen.
I am not at my working PC so I cannot add an example but search around you
will see what I mean.
BR,
Noam.
________________________________
From: lwip-users <[email protected]> on behalf
of Gabriel Harrison <[email protected]>
Sent: Monday, June 27, 2016 1:41 PM
To: [email protected]
Subject: [lwip-users] Correct way to free pbufs after tcp_recv callback
finished
Hi,
We've started our first lwIP project, following the instructions on
http://lwip.wikia.com/wiki/Raw/TCP to create our high level functions and
taking the device level IRQ functions and ethernetif.c from the SDK for our
chip (Freescale Kinetis K60)
Raw/TCP - lwIP Wiki - Wikia<http://lwip.wikia.com/wiki/Raw/TCP>
lwip.wikia.com
Initialization Edit. lwip_init() must be called before any tcp functions
are called. void tcp_tmr(void) After lwip_init() is called, you must call
tcp_tmr ...
Although we appear to have set things up correctly - we can send & receive
requests - the TCP pbufs pool is not running out and it looks like they are
not being freed after the receive has been processed.
I can see in tcp_recv_null in tcp.c that pbuf_free(p); is called after
tcp_recved(pcb, p->tot_len); but I can't find any info about freeing the
pbufs in the wiki via either pbuf_free or pbuf_free_callback.
Should I be calling pbuf_free/ pbuf_free_callback in our receive callback
or is this supposed to be handled elsewhere?
Thanks,
Gabriel
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