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wgengine/netstack: clear TCP ECN bits before giving to gvisor

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Updates #2642

Change-Id: Ic219442a2656dd9dc99ae1dd91e907fd3d924987
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-01-19 14:33:50 -08:00
committed by Brad Fitzpatrick
parent de4696da10
commit c64af5e676
3 changed files with 134 additions and 10 deletions
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wgengine/netstack/netstack.go
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@@ -512,6 +512,7 @@ func (ns *Impl) injectInbound(p *packet.Parsed, t *tstun.Wrapper) filter.Respons
case 6:
pn = header.IPv6ProtocolNumber
}
p.RemoveECNBits() // Issue 2642
if debugPackets {
ns.logf("[v2] packet in (from %v): % x", p.Src, p.Buffer())
}