Bug#987815: MPTCP is not enabled

From	chrysn <chrysn@fsfe.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#987815: MPTCP is not enabled
Date	2021-04-30 11:30 +0200
Message-ID	<C9xDc-5NF-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Source: linux
Version: 5.10.28-1
Severity: wishlist


The current configuration does not enable the multipath TCP
functionality provided by the kernel through the MPTCP (and the
the-default MPTCP_IPV6) binary options.

These have been available since kernel version 5.6.

When enabled, user space applications can opt in to MPTCP behavior by
using the new IPPROTO_MPTCP; regular TCP connections are unaffected.

Applications using this are starting slowly (outside of the Apple
ecosystem where this has been in used for years to ensure smooth network
handovers), but having this available widely would make it easier for
application developers to verify MPTCP operation on systems where they
can't easily (or don't have the experience to) rebuild their kernel with
CONFIG_MPTCP=y.

Please consider enabling this feature.


-- System Information:
Debian Release: 11.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.12.0-rc5 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

-- 
To use raw power is to make yourself infinitely vulnerable to greater powers.
  -- Bene Gesserit axiom

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Bug#987815: MPTCP is not enabled chrysn <chrysn@fsfe.org> - 2021-04-30 11:30 +0200
  Bug#987815: MPTCP is not enabled Salvatore Bonaccorso <carnil@debian.org> - 2021-05-01 09:50 +0200
  Processed: Re: Bug#987815: MPTCP is not enabled "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-05-01 09:50 +0200
  Bug#987815: marked as done (MPTCP is not enabled) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-08-20 23:40 +0200

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