Date: Sun, 10 Jul 2022 16:59:36 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: "Alexander V. Chernikov" <melifaro@ipfw.ru> Cc: "Alexander V. Chernikov" <melifaro@FreeBSD.org>, "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org> Subject: Re: git: 50fa27e795ea - main - netinet6: fix interface handling for loopback traffic Message-ID: <alpine.BSF.2.00.2207101658500.68830@ai.fobar.qr> In-Reply-To: <71D08533-EE9B-439F-B8DD-1DF5C46D5862@ipfw.ru> References: <202207101248.26ACmWT1069733@gitrepo.freebsd.org> <alpine.BSF.2.00.2207101330050.68830@ai.fobar.qr> <71D08533-EE9B-439F-B8DD-1DF5C46D5862@ipfw.ru>
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On Sun, 10 Jul 2022, Alexander V. Chernikov wrote: > > >> On 10 Jul 2022, at 14:32, Bjoern A. Zeeb <bz@FreeBSD.org> wrote: >> >> On Sun, 10 Jul 2022, Alexander V. Chernikov wrote: >> >>> The branch main has been updated by melifaro: >>> >>> URL: https://cgit.FreeBSD.org/src/commit/?id=50fa27e795eaae97dae87ac4532799f7aea87e9f >>> >>> commit 50fa27e795eaae97dae87ac4532799f7aea87e9f >>> Author: Alexander V. Chernikov <melifaro@FreeBSD.org> >>> AuthorDate: 2022-07-10 12:27:23 +0000 >>> Commit: Alexander V. Chernikov <melifaro@FreeBSD.org> >>> CommitDate: 2022-07-10 12:47:47 +0000 >>> >>> netinet6: fix interface handling for loopback traffic >>> >>> Currently, processing of IPv6 local traffic is partially broken: >>> link-local connection fails and global unicast connect() takes >>> 3 seconds to complete. >>> This happens due to the combination of multiple factors. >>> IPv6 code passes original interface "origifp" when passing >>> traffic via loopack to retain the scope that is mandatory for the >>> correct hadling of link-local traffic. First problem is that the logic >>> of passing source interface is not working correcly for TCP connections, >>> resulting in passing "origifp" on the first 2 connection attempts and >>> lo0 on the subsequent ones. Second problem is that source address >>> validation logic skips its checks iff the source interface is loopback, >>> which doesn't cover "origifp" case. >>> More detailed description is available at https://reviews.freebsd.org/D35732 >>> >>> Fix the first problem by untangling&simplifying ifp/origifp logic. >>> Fix the second problem by switching source address validation check to >>> using M_LOOP mbuf flag instead of interface type. >>> >>> PR: 265089 >>> Reviewed by: ae, bz(previous version) >> >> I did not review, I had only commented on D35117. > Sorry, I chose a wrong wording for mentioning the discussion happened. > Do you prefer me to rollback/commit with an updated message? No, I would have prefered more than 4 days of time to look at the updated changes after 4 months, but I can still do that now that things are in. Just keep going, we'll take it from here. >> >> >>> Differential Revision: https://reviews.freebsd.org/D35732 >>> MFC after: 2 weeks >>> --- >>> sys/netinet6/ip6_input.c | 2 +- >>> sys/netinet6/ip6_output.c | 61 ++++++++++++++++++----------------- >>> tests/sys/netinet6/test_ip6_output.py | 4 +-- >>> 3 files changed, 35 insertions(+), 32 deletions(-) >> >> -- >> Bjoern A. Zeeb r15:7 > > -- Bjoern A. Zeeb r15:7
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