// Copyright 2013 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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// +build darwin
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package ipv6
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import (
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"unsafe"
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"golang.org/x/net/internal/iana"
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"golang.org/x/net/internal/socket"
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)
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func marshal2292HopLimit(b []byte, cm *ControlMessage) []byte {
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m := socket.ControlMessage(b)
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m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, 4)
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if cm != nil {
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socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit))
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}
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return m.Next(4)
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}
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func marshal2292PacketInfo(b []byte, cm *ControlMessage) []byte {
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m := socket.ControlMessage(b)
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m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292PKTINFO, sizeofInet6Pktinfo)
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if cm != nil {
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pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0]))
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if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
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copy(pi.Addr[:], ip)
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}
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if cm.IfIndex > 0 {
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pi.setIfindex(cm.IfIndex)
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}
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}
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return m.Next(sizeofInet6Pktinfo)
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}
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func marshal2292NextHop(b []byte, cm *ControlMessage) []byte {
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m := socket.ControlMessage(b)
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m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292NEXTHOP, sizeofSockaddrInet6)
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if cm != nil {
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sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0]))
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sa.setSockaddr(cm.NextHop, cm.IfIndex)
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}
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return m.Next(sizeofSockaddrInet6)
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}
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