From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH iproute2] vxlan: add ipv6 support
Date: Fri, 19 Apr 2013 08:26:23 -0700
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Cc: netdev@vger.kernel.org
To: Cong Wang <amwang@redhat.com>
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On Fri, 19 Apr 2013 22:20:12 +0800
Cong Wang <amwang@redhat.com> wrote:

> On Thu, 2013-04-18 at 15:57 -0700, Stephen Hemminger wrote:
> > On Wed, 17 Apr 2013 13:10:23 +0800
> > Cong Wang <amwang@redhat.com> wrote:
> > 
> > > +			if (!inet_pton(AF_INET, *argv, &gaddr)) {
> > > +				if (!inet_pton(AF_INET6, *argv, &gaddr6)) {
> > > +					fprintf(stderr, "Invalid address \"%s\"\n", *argv);
> > > +					return -1;
> > > +				} else if (!IN6_IS_ADDR_MULTICAST(&gaddr6))
> > > +					invarg("invald group address", *argv);
> > > +			} else if (!IN_MULTICAST(ntohl(gaddr)))
> > > +					invarg("invald group address", *argv);
> > 
> > Maybe using getaddrinfo would be better to allow symbolic names as well?
> 
> Yes, but I don't think many people use symbolic name for a multicast
> group?
> 
> Thanks.
> 

You can use AI_NUMERICHOST to avoid symbolic names.