[Olsr-users] Solved: IPv6: Using link-local all-hosts multicast address ff02::1 instead of ff0e::1 with Linux?

[Hannes Gredler]

looks good - committed to TIP and 0.5.6 branch (that we have created first time
to add bugfixes only).

/hannes

On Wed, Aug 20, 2008 at 06:08:29AM -0700, Joerg Pommnitz wrote:
| Found it!
| Using link-local addresses the Linux kernel looks at the sin6_scope_id
| member of a struct sockaddr_in6. This one was randomly initialized.
| Patch (against 0.5.3):
| 
| --- src/unix/ifnet.c	(revision 1975)
| +++ src/unix/ifnet.c	(working copy)
| @@ -776,13 +776,14 @@
|        OLSR_PRINTF(debuglvl, "\tAddress: %s\n", ip6_to_string(&ifs.int6_addr.sin6_addr));
|        
|        /* Multicast */
| +      memset (&ifs.int6_multaddr, 0, sizeof (ifs.int6_multaddr));
| +      ifs.int6_multaddr.sin6_family   = AF_INET6;
| +      ifs.int6_multaddr.sin6_flowinfo = htonl(0);
| +      ifs.int6_multaddr.sin6_scope_id = if_nametoindex(ifr.ifr_name);
| +      ifs.int6_multaddr.sin6_port     = htons(OLSRPORT);
|        ifs.int6_multaddr.sin6_addr = (iface->cnf->ipv6_addrtype == IPV6_ADDR_SITELOCAL) ? 
|  	iface->cnf->ipv6_multi_site.v6 :
|  	iface->cnf->ipv6_multi_glbl.v6;
| -      /* Set address family */
| -      ifs.int6_multaddr.sin6_family = AF_INET6;
| -      /* Set port */
| -      ifs.int6_multaddr.sin6_port = htons(OLSRPORT);
|        
|  #ifdef __MacOSX__
|        ifs.int6_multaddr.sin6_scope_id = 0;
| 
| 
| 
| -- 
| Regards
|        Joerg
| 
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