1// Copyright 2013 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package icmp
6
7import (
8	"net"
9
10	"golang.org/x/net/internal/iana"
11)
12
13const ipv6PseudoHeaderLen = 2*net.IPv6len + 8
14
15// IPv6PseudoHeader returns an IPv6 pseudo header for checksum
16// calculation.
17func IPv6PseudoHeader(src, dst net.IP) []byte {
18	b := make([]byte, ipv6PseudoHeaderLen)
19	copy(b, src.To16())
20	copy(b[net.IPv6len:], dst.To16())
21	b[len(b)-1] = byte(iana.ProtocolIPv6ICMP)
22	return b
23}
24