[lwip-users] [lwip] FIXED cs8900a driver (pbuf mem leak) and FIXED dhcp client

[leon . woestenberg]

Hello all,

thanks to Paul Lieverse's remarks on the pbuf handling, the cs8900a driver
has
been fixed to prevent a memory leak.

In cs8900if_output(), if the pbuf did not have enough header room (*), the
allocated
header was not deallocated later. Fixed.

(*) This should not occur in the first place, but seems to be the result of
a bug in
PBUF_*_HLEN sizes and also a bug in pbuf_alloc() which does not allocate
the
right headers sizes in some situations.

The new cs8900a driver needs Paul's fix to pbuf_dechain(), which I've
included
for all safeness (people not reading this list).

Also, I've fixed the DHCP client which didn't handle some rare situations
robustly
enough.

http://www.esrac.ele.tue.nl/~leon/lwip/

Thanks for the bug hunt. Please test the given stuff and give feed back.

Special thanks to Paul Lieverse!

Regards,

Leon Woestenberg

Axon Digital Design
Phone: +31 13 511 6666
Fax: +31 13 511 4151
web: www.axon.tv

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