From: Sabrina Dubroca <sd@queasysnail.net>
To: Antonio Quartulli <antonio@openvpn.net>
Cc: netdev@vger.kernel.org, Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Ralf Lici <ralf@mandelbit.com>
Subject: Re: [PATCH net-next 4/8] ovpn: Allow IPv6 link-local addresses through RPF check
Date: Fri, 14 Nov 2025 17:06:40 +0100 [thread overview]
Message-ID: <aRdTkDHlRi0WbsVS@krikkit> (raw)
In-Reply-To: <20251111214744.12479-5-antonio@openvpn.net>
2025-11-11, 22:47:37 +0100, Antonio Quartulli wrote:
> From: Ralf Lici <ralf@mandelbit.com>
>
> IPv6 link-local addresses are not globally routable and are therefore
> absent in the unicast routing table. This causes legitimate packets with
> link-local source addresses to fail standard RPF checks within ovpn.
>
> Introduce an exception to explicitly allow such packets as link-local
> addresses are essential for core IPv6 link-level operations like NDP,
> which must function correctly within the virtual tunnel interface.
Does this fix an existing bug, or does it only become a problem for
some of the new features in that series (multipeer-to-multipeer?)? If
this is a problem for existing use-cases, there should be a Fixes tag.
--
Sabrina
next prev parent reply other threads:[~2025-11-14 16:06 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-11 21:47 [PATCH net-next 0/8] pull request: ovpn 2025-11-11 Antonio Quartulli
2025-11-11 21:47 ` [PATCH net-next 1/8] ovpn: use correct array size to parse nested attributes in ovpn_nl_key_swap_doit Antonio Quartulli
2025-11-14 2:26 ` Jakub Kicinski
2025-11-14 13:30 ` Antonio Quartulli
2025-11-11 21:47 ` [PATCH net-next 2/8] ovpn: pktid: use bitops.h API Antonio Quartulli
2025-11-15 10:10 ` Sabrina Dubroca
2025-11-11 21:47 ` [PATCH net-next 3/8] ovpn: notify userspace on client float event Antonio Quartulli
2025-11-14 2:21 ` Jakub Kicinski
2025-11-14 9:26 ` Ralf Lici
2025-11-14 14:22 ` Sabrina Dubroca
2025-11-14 14:43 ` Ralf Lici
2025-11-11 21:47 ` [PATCH net-next 4/8] ovpn: Allow IPv6 link-local addresses through RPF check Antonio Quartulli
2025-11-14 16:06 ` Sabrina Dubroca [this message]
2025-11-18 10:26 ` Antonio Quartulli
2025-11-11 21:47 ` [PATCH net-next 5/8] ovpn: add support for asymmetric peer IDs Antonio Quartulli
2025-11-13 13:58 ` Sabrina Dubroca
2025-11-13 14:12 ` Antonio Quartulli
2025-11-13 15:18 ` Sabrina Dubroca
2025-11-11 21:47 ` [PATCH net-next 6/8] ovpn: consolidate crypto allocations in one chunk Antonio Quartulli
2025-11-12 16:29 ` Sabrina Dubroca
2025-11-13 8:37 ` Antonio Quartulli
2025-11-13 10:35 ` Ralf Lici
2025-11-13 13:48 ` Sabrina Dubroca
2025-11-13 16:32 ` Ralf Lici
2025-11-14 2:25 ` Jakub Kicinski
2025-11-14 9:33 ` Ralf Lici
2025-11-11 21:47 ` [PATCH net-next 7/8] ovpn: use bound device in UDP when available Antonio Quartulli
2025-11-11 21:47 ` [PATCH net-next 8/8] ovpn: use bound address " Antonio Quartulli
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