Re: libpcap error codes?

[Guy Harris via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
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> From: Guy Harris <gharris () sonic net>
>
> Date: Wed, 7 Oct 2020 14:37:41 -0700
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> On Oct 7, 2020, at 1:30 PM, Fernando Gont via tcpdump-workers <tcpdump-workers () lists tcpdump org> wrote:
>
> > WHile using pcap_inject() in Linux, it is failing with "pcap_inject(): send: Resource temporarily unavailable". In 
> > principle, one would expect that for temporary problems (such as this one), one may one to wait a bit and retry.  So 
> > it would make sense to somehow be able to process the error code/condition, and act differently depending on the 
> > error type.
> >
> > Is there a way to get an error code (say, int value), as opposed to a text describing it?
>
> There isn't, other than looking at errno.
>
> A new API could be added that returns a PCAP_ERROR_ value rather than -1 on error (so as not to break source or binary 
> compatibility with code using the existing APIs).
>
> --- End Message ---
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