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Matthieu Baerts (NGI0) 97ae1817fb net: check for MPTCP in DialTCP and ListenTCP
Setting GODEBUG=multipathtcp= [1] has no effects on apps using
ListenTCP or DialTCP directly.

According to the documentation, these functions are supposed to act like
Listen and Dial respectively:

    ListenTCP acts like Listen for TCP networks.
    DialTCP acts like Dial for TCP networks.

So when reading this, I think we should expect GODEBUG=multipathtcp= to
act on these functions as well.

Also, since #69016, MPTCP is used by default (if supported) with TCP
listeners. Similarly, when ListenTCP is used directly, MPTCP is
unexpectedly not used. It is strange to have a different behaviour.

So now, ListenTCP and DialTCP also check for MPTCP. Those are the exact
same checks that are done in dial.go, see Listen and dialSingle.

[1] https://pkg.go.dev/net#Dialer.SetMultipathTCP

Fixes #70500

Change-Id: I646431a74571668e505493fa8c1b2206bf30ed09
GitHub-Last-Rev: 69a31a1b03
GitHub-Pull-Request: golang/go#70501
Reviewed-on: https://go-review.googlesource.com/c/go/+/630715
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-11-21 22:53:35 +00:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api crypto/tls: add server-side ECH 2024-11-21 22:50:04 +00:00
doc crypto/tls: add server-side ECH 2024-11-21 22:50:04 +00:00
lib all: rename crypto/internal/fips to crypto/internal/fips140 2024-11-20 20:28:34 +00:00
misc misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
src net: check for MPTCP in DialTCP and ListenTCP 2024-11-21 22:53:35 +00:00
test cmd/compile: fix rewrite rules for multiply/add 2024-11-21 15:06:30 +00:00
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.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
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CONTRIBUTING.md
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LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
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