Hi, regarding MLD, RFC3810. I see that is similar to IGMP in these aspects:
Section 5. Message Formats:
"All MLDv2 messages
described in this document MUST be sent with a link-local IPv6 Source
Address, an IPv6 Hop Limit of 1, and an IPv6 Router Alert option
[RFC2711] in a Hop-by-Hop Opt
Hello,
On Fri, Feb 24, 2023 at 08:57:51PM +0100, Alexander Bluhm wrote:
>
> > Regarding MLD, I can't say anything because I've never tested multicast
> > routing with IP6.
>
> We should figure out what RFC says about IPv6 MLD. If we use Luca's
> smarter logic for IPv4, we should also fix IPv6
On Fri, Feb 24, 2023 at 08:42:29AM +0100, Luca Di Gregorio wrote:
> I would implement this logic:
>
> If the IP Destination Address is 224.0.0.0/4, then the TTL should be 1.
> If the IP Destination Address is not 224.0.0.0/4, then no restrictions on
> TTL.
>
> In your code, I would do this modifi
Hi Alexandr,
RFC1112 is updated by RFC2236
RFC2236 is updated by RFC3376
In RFC3376, sections 4.1.12 and 4.2.14:
"In addition, a system MUST accept and process ... of Query/Report whose IP
Destination Address field contains *any* of the addresses (unicast or
multicast) assigned to the interface o
Hello Luca,
On Thu, Feb 23, 2023 at 09:22:07AM +0100, Luca Di Gregorio wrote:
> Synopsis: PF still blocks IGMP multicast control packets
> Category: system
> Environment:
> System : OpenBSD 7.2
> Details : OpenBSD 7.2 (GENERIC) #6: Sat Jan 21 01:01:28 MST 2023
>
Viewing the thread at https://marc.info/?l=openbsd-cvs&m=165158473312045&w=2
I think that the problem is with TTL and Destination Address.
"MLD/IGMP messages with ttl other than 1 will be discarded"
"IGMP messages with destination address other than multicast class will be
discarded.
Prune message
Thanks Brian,
https://www.openbsd.org/72.html says:
"pf(4) automatically allows IGMP and ICMP6 MLD packets with the router
alert option. Special allow-opts rules are no longer needed for multicast
discovery."
This is true for some igmp dvmrp Probe, igmp dvmrp Report, igmp join/leave,
igmp query.
On Thu, Feb 23, 2023, at 2:22 AM, Luca Di Gregorio wrote:
> Synopsis: PF still blocks IGMP multicast control packets
> Category: system
> Environment:
> System : OpenBSD 7.2
> Details : OpenBSD 7.2 (GENERIC) #6: Sat Jan 21 01:01:28 MST 2023
>
