Re: Checking for specific return errors in libpcap

[Fernando Gont <fernando () gont com ar>]

On 12/29/2011 09:27 PM, Guy Harris wrote:
> > While there exist functions such as pcap_geterr() to print an 
> > error-specific message, I'm rather interested in obtaining an error
> > code such that my program can act differently depending on the
> > specific return error.
> >
> > If that's possible?
>
> Setting errno to 0 before calling them, and, if they return -1,
> checking the value of errno *might* work.  No guarantees, and bear in
> mind that errno values for various conditions are
> platform-dependent.
>
> Ultimately, there should perhaps be different APIs, specified to
> return PCAP_ERROR_ values on error, so that

How about a function along the lines of pcap_geterrcode() that obtains
the error code for the last error?

That aside, where do pcap_geterr() and pcap_perror() look at to convert
the error to a string that describes the error?

Thanks!

Best regards,
-- 
Fernando Gont
e-mail: fernando () gont com ar || fgont () si6networks com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1



-
This is the tcpdump-workers list.
Visit https://cod.sandelman.ca/ to unsubscribe.