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dd0b200aed
The x/net go.mod now depends on go1.23. Change-Id: I24960949d84753f84f75fbdc97b7dfb92191a4d2 Reviewed-on: https://go-review.googlesource.com/c/net/+/664295 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Jonathan Amsterdam <jba@google.com> Auto-Submit: Damien Neil <dneil@google.com>
39 lines
974 B
Go
39 lines
974 B
Go
// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build darwin
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package quic
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import (
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"encoding/binary"
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"golang.org/x/sys/unix"
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)
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// See udp.go.
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const (
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udpECNSupport = true
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udpInvalidLocalAddrIsError = true
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)
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// Confusingly, on Darwin the contents of the IP_TOS option differ depending on whether
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// it is used as an inbound or outbound cmsg.
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func parseIPTOS(b []byte) (ecnBits, bool) {
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// Single byte. The low two bits are the ECN field.
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if len(b) != 1 {
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return 0, false
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}
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return ecnBits(b[0] & ecnMask), true
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}
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func appendCmsgECNv4(b []byte, ecn ecnBits) []byte {
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// 32-bit integer.
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// https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/netinet/in_tclass.c#L1062-L1073
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b, data := appendCmsg(b, unix.IPPROTO_IP, unix.IP_TOS, 4)
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binary.NativeEndian.PutUint32(data, uint32(ecn))
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return b
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}
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