[Dnsmasq-discuss] multiple dhcp6 servers

[Gene Czarcinski]

On 10/13/2012 01:20 PM, Gene Czarcinski wrote:
> -----------------------------
> +  /* When bind-interfaces is set, there might be more than one dnmsasq
> +     instance binding port 547. That's OK if they serve different 
> networks.
> +     Need to set REUSEADDR to make this posible, or REUSEPORT on 
> *BSD. */
> +  if (option_bool(OPT_NOWILD) || option_bool(OPT_CLEVERBIND))
> +    {
> +      int oneopt = 1;
> +#ifdef SO_REUSEPORT
> +      int rc = setsockopt(fd, IPPROTO_IPV6, SO_REUSEPORT, &oneopt, 
> sizeof(oneopt));
> +#else
> +      int rc = setsockopt(fd, IPPROTO_IPV6, SO_REUSEADDR, &oneopt, 
> sizeof(oneopt));
> +#endif
> +      if (rc == -1)
> +    die(_("failed to set SO_REUSE{ADDR|PORT} on DHCP socket: %s"), 
> NULL, EC_BADNET);
> +    }
> +
> --------------------------- 
Arrgh!  Well, you can tell that I don't really know what I am doing with 
socket code!

Your original code inserted into dhcp6.c was the right thing to do. I 
just changed IPPROTO_IPV6 to SOL_SOCKET and it looks like it works (I 
have two of them running anyway).  At this point I do now know if you 
need the V6ONLY or not.

Now to do some real testing!

Gene