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disco,net/tstun,wgengine/magicsock: probe peer MTU

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Automatically probe the path MTU to a peer when peer MTU is enabled, but do not
use the MTU information for anything yet.

Updates #311

Signed-off-by: Val <valerie@tailscale.com>
This commit is contained in:
Val
2023-10-05 20:05:19 +02:00
committed by valscale
parent b4e587c3bd
commit 893bdd729c
7 changed files with 91 additions and 40 deletions
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2
wgengine/magicsock/magicsock.go
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@@ -1567,7 +1567,7 @@ func (c *Conn) handlePingLocked(dm *disco.Ping, src netip.AddrPort, di *discoInf
if numNodes > 1 {
pingNodeSrcStr = "[one-of-multi]"
}
c.dlogf("[v1] magicsock: disco: %v<-%v (%v, %v) got ping tx=%x", c.discoShort, di.discoShort, pingNodeSrcStr, src, dm.TxID[:6])
c.dlogf("[v1] magicsock: disco: %v<-%v (%v, %v) got ping tx=%x padding=%v", c.discoShort, di.discoShort, pingNodeSrcStr, src, dm.TxID[:6], dm.Padding)
}
ipDst := src