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Re: [lwip-users] Relationship between lwIP options
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From: |
Simon Goldschmidt |
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Subject: |
Re: [lwip-users] Relationship between lwIP options |
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Date: |
Tue, 04 Aug 2009 07:23:06 +0200 |
> If you say PBUF pool is only for incoming packet, then lwip SNMP driver is
> in Fault.
I know, there's some 'room for improvement' in the snmp code... In any case
it's a bad example and the pbuf pool really should only be used for incoming
packets right now.
The reason is that *if* outgoing packets would empty the pbuf pool, there would
be no pbufs left for incoming packets and the stack might stall (e.g. incoming
packets would be needed to free outgoing TCP packet that are queued for ACK).
Simon
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