(usagi-users 02578) Re: ipv6 multicast problem on Linux kernel 2.4.18-3 while doing a sendto

[Stig Venaas <Stig.Venaas@xxxxxxxxxx>]

On Tue, Oct 21, 2003 at 12:17:42AM +0530, Deepak Kotian wrote:
> We  are currently facing a problem when
> we try mutlicast IP FF12::224.5.6.7 on Linux.
> The function inet_pton() returns > 0, that means the IP is OK, but
> when we do a sendto(), it gives an error as 99.

I don't really think it's the case, but you might try to verify that
the data generated by inet_pton() is ok, or try with ff12::e005:607.
I'm frequently using multicast addresses with this "IPv4 syntax"
though, and have never had problems.

> The kernel used is 2.4.18-3 and ipv6 is enable. 
> Can one please let me know, how to make this multicast IPV6
> sendto() functionality work properly. 
> Also an additional information.
> F001:0:0:0:0:0:0:43 MULTICast address works
> fine with sendto, but FF12::224.5.6.7 does not
> work.

You're having the problem on that particular kernel? With or without
USAGI patches? I've been doing v6 multicast on several different Linux
kernels without such problems. I tested with FF12::224.5.6.7 right now
on a box running RedHat's 2.4.20-8, no problems there.

Stig