[lwip-devel] [task #7675] Enable to refuse data on a TCP_EVENT_RECV call

[Simon Goldschmidt]

Follow-up Comment #1, task #7675 (project lwip):

In my opinion, the best solution would be to first call TCP_EVENT_RECV and
only acknowledge the data if it returned ERR_OK. In case of an error, the data
could be deleted and would eventually be retransmitted by the other side.

While this produces more traffic, I think it would be better than keeping
pbufs allocated in a case where the application doesn't process (and free)
them fast enough: that could easily lead to running out of memory.


However, rhe change in tcp_in.c for receiving first and then acknowledging
might not be simple and so I think it should not hold back 1.3.0.

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