|Subject:||Re: [lwip-users] Is tcp_err()-callback optional?|
|Date:||Mon, 12 Oct 2015 13:39:35 +0200|
Karl Karpfen wrote:
>indepenedent from the fact if it makes sense or if it is bad program style:
> is it mandatory to announce a error-callback via tcp_err() or will the whole
> thing also work smoothly when there is no error-callback function available?
It is kind ofmandatory: without an 'err' callback, your application would never know if the pcb got deallocated (and possibly reused) due to a RST received or due to local pcb shortage.
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