Re: IPV6_CHECKSUM and nping

["Luis MartinGarcia." <luis.mgarc () gmail com>]

Hi Gisle,

Thank you for reporting this issue. It's weird because I have just built
the latest version of Nping on a Windows XP with no problems. I'm
running XP SP3. Which Windows XP are you running? Home or Pro? Which
Service Pack?

Anyway, I've applied the patch, since it does no harm at all.

BTW, another weird thing is that IPV6_CHECKSUM is completely
undocumented in MSDN. There are many documented flags for setsockopt()
but none of them is related to checksums
[http://msdn.microsoft.com/en-us/library/ms738574%28v=VS.85%29.aspx]

Luis MartinGarcia.








On 04/05/2010 04:17 PM, Gisle Vanem wrote:
> The option IPV6_CHECKSUM isn't available on Win-XP (and I'm sure older
> Win-boxes).
> So here is a small patch to make nping build on those OS'es:
>
> --- SVN-Latest\nping\nping.cc   Mon Apr 05 16:14:49 2010
> +++ nping\nping.cc      Mon Apr 05 16:09:56 2010
> @@ -861,6 +861,7 @@
>     if( setsockopt(rawfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (char
> *)&hoplimit, sizeof(hoplimit)) != 0 )
>         outError(QT_2, "doIPv6ThroughSocket(): setsockopt() for
> Multicast Hop Limit on IPv6 socket failed");
>
> +#ifdef IPV6_CHECKSUM  /* This is not available on Win-XP at least */
>     /* Transport layer checksum */
>     /* This is totally crazy. We have to tell the kernel EXPLICITLY
> that we
>      * want it to set the TCP/UDP checksum for us. Why the hell is
> this the
> @@ -878,6 +879,7 @@
>                 outError(QT_2, "doIPv6ThroughSocket(): failed to set
> IPV6_CHECKSUM option on IPv6 s
> ocket. ");
>         }
>     }
> +#endif
>
>     /* Bind IPv6 socket to a specific network interface */
>     if ( o.issetDevice() )  {
>
> --------------
>
> --gv
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