On 11/07/08 11:23, Adrian Knoth wrote:
On Fri, Nov 07, 2008 at 09:49:43AM -0500, Rolf Vandevaart wrote:
I do not think anyone will have a problem with this, but just thought I
would mention that I am planning on adding an additional interface to
the excluded list for the tcp btl. I want to add "sppp" to the list.
This is an internal interface to one of our servers and needs to be
treated like the "lo" interface.
Is it possible to detect this interface and exclude it right from the
beginning in opal/util/if.c? Special flags that apply to this interface,
so we have a classification?
Just my $0.02
I considered this. I believe the sppp0 is a "point-to-point" interface,
so I see that the IPv6 code has actually done something like this.
if(0 != (cur_ifaddrs->ifa_flags & IFF_LOOPBACK)
|| 0!= (cur_ifaddrs->ifa_flags & IFF_POINTOPOINT)) {
#if 0
printf("skipping loopback interface %s.\n",
cur_ifaddrs->ifa_name);
#endif
continue;
}
However, the IPv4 code does not do this. In fact, the loopback check is
#ifdef'ed out.
#if 0
if ((ifr->ifr_flags & IFF_LOOPBACK) != 0)
continue;
#endif
So, in order for things to work properly in both case, I wanted to mimic
what was done for lo interfaces. I am leery about duplicating the IPv6
code in the IPv4 code as I looked at earlier discussions on the mailing
list saying that was a bad idea.
http://www.open-mpi.org/community/lists/devel/2008/02/3290.php
So, just adding it to the list of the excluded interfaces seemed the
safest fix to me.
Rolf
--
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rolf.vandeva...@sun.com
781-442-3043
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