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wgengine/magicsock: replace CanPMTUD() with ShouldPMTUD()

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Replace CanPMTUD() with ShouldPMTUD() to check if peer path MTU discovery should
be enabled, in preparation for adding support for enabling/disabling peer MTU
dynamically.

Updated #311

Signed-off-by: Val <valerie@tailscale.com>
This commit is contained in:
Val
2023-09-18 21:21:46 +02:00
committed by valscale
parent a5ae21a832
commit 95635857dc
7 changed files with 128 additions and 20 deletions
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8
wgengine/magicsock/debugknobs.go
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@@ -53,9 +53,11 @@ var (
// discovery on UDP connections between peers. Currently (2023-09-05)
// this only turns on the don't fragment bit for the magicsock UDP
// sockets.
debugEnablePMTUD = envknob.RegisterBool("TS_DEBUG_ENABLE_PMTUD")
// Hey you! Adding a new debugknob? Make sure to stub it out in the debugknob_stubs.go
// file too.
debugEnablePMTUD = envknob.RegisterOptBool("TS_DEBUG_ENABLE_PMTUD")
// debugPMTUD prints extra debugging about peer MTU path discovery.
debugPMTUD = envknob.RegisterBool("TS_DEBUG_PMTUD")
// Hey you! Adding a new debugknob? Make sure to stub it out in the
// debugknobs_stubs.go file too.
)
// inTest reports whether the running program is a test that set the