blob: 51fbbb1f170564bdec4a32802e45bb044ee23dab [file] [log] [blame]
// Copyright 2013 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 aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
package ipv6
import (
"net"
"unsafe"
"golang.org/x/net/internal/iana"
"golang.org/x/net/internal/socket"
"golang.org/x/sys/unix"
)
func marshalTrafficClass(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIPv6, unix.IPV6_TCLASS, 4)
if cm != nil {
socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.TrafficClass))
}
return m.Next(4)
}
func parseTrafficClass(cm *ControlMessage, b []byte) {
cm.TrafficClass = int(socket.NativeEndian.Uint32(b[:4]))
}
func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIPv6, unix.IPV6_HOPLIMIT, 4)
if cm != nil {
socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit))
}
return m.Next(4)
}
func parseHopLimit(cm *ControlMessage, b []byte) {
cm.HopLimit = int(socket.NativeEndian.Uint32(b[:4]))
}
func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIPv6, unix.IPV6_PKTINFO, sizeofInet6Pktinfo)
if cm != nil {
pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0]))
if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
copy(pi.Addr[:], ip)
}
if cm.IfIndex > 0 {
pi.setIfindex(cm.IfIndex)
}
}
return m.Next(sizeofInet6Pktinfo)
}
func parsePacketInfo(cm *ControlMessage, b []byte) {
pi := (*inet6Pktinfo)(unsafe.Pointer(&b[0]))
if len(cm.Dst) < net.IPv6len {
cm.Dst = make(net.IP, net.IPv6len)
}
copy(cm.Dst, pi.Addr[:])
cm.IfIndex = int(pi.Ifindex)
}
func marshalNextHop(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIPv6, unix.IPV6_NEXTHOP, sizeofSockaddrInet6)
if cm != nil {
sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0]))
sa.setSockaddr(cm.NextHop, cm.IfIndex)
}
return m.Next(sizeofSockaddrInet6)
}
func parseNextHop(cm *ControlMessage, b []byte) {
}
func marshalPathMTU(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIPv6, unix.IPV6_PATHMTU, sizeofIPv6Mtuinfo)
return m.Next(sizeofIPv6Mtuinfo)
}
func parsePathMTU(cm *ControlMessage, b []byte) {
mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0]))
if len(cm.Dst) < net.IPv6len {
cm.Dst = make(net.IP, net.IPv6len)
}
copy(cm.Dst, mi.Addr.Addr[:])
cm.IfIndex = int(mi.Addr.Scope_id)
cm.MTU = int(mi.Mtu)
}