1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.21 && linux
package quic
import (
"golang.org/x/sys/unix"
)
// See udp.go.
const (
udpECNSupport = true
udpInvalidLocalAddrIsError = false
)
// The IP_TOS socket option is a single byte containing the IP TOS field.
// The low two bits are the ECN field.
func parseIPTOS(b []byte) (ecnBits, bool) {
if len(b) != 1 {
return 0, false
}
return ecnBits(b[0] & ecnMask), true
}
func appendCmsgECNv4(b []byte, ecn ecnBits) []byte {
b, data := appendCmsg(b, unix.IPPROTO_IP, unix.IP_TOS, 1)
data[0] = byte(ecn)
return b
}
|
