sys_freebsd.go raw

   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  
   5  package ipv6
   6  
   7  import (
   8  	"net"
   9  	"runtime"
  10  	"strings"
  11  	"syscall"
  12  	"unsafe"
  13  
  14  	"golang.org/x/net/internal/iana"
  15  	"golang.org/x/net/internal/socket"
  16  
  17  	"golang.org/x/sys/unix"
  18  )
  19  
  20  var (
  21  	ctlOpts = [ctlMax]ctlOpt{
  22  		ctlTrafficClass: {unix.IPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
  23  		ctlHopLimit:     {unix.IPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
  24  		ctlPacketInfo:   {unix.IPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
  25  		ctlNextHop:      {unix.IPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop},
  26  		ctlPathMTU:      {unix.IPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
  27  	}
  28  
  29  	sockOpts = map[int]sockOpt{
  30  		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_TCLASS, Len: 4}},
  31  		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_UNICAST_HOPS, Len: 4}},
  32  		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_IF, Len: 4}},
  33  		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_HOPS, Len: 4}},
  34  		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_LOOP, Len: 4}},
  35  		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVTCLASS, Len: 4}},
  36  		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVHOPLIMIT, Len: 4}},
  37  		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVPKTINFO, Len: 4}},
  38  		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVPATHMTU, Len: 4}},
  39  		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
  40  		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_CHECKSUM, Len: 4}},
  41  		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: unix.ICMP6_FILTER, Len: sizeofICMPv6Filter}},
  42  		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  43  		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  44  		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  45  		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  46  		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  47  		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  48  	}
  49  )
  50  
  51  func init() {
  52  	if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
  53  		archs, _ := syscall.Sysctl("kern.supported_archs")
  54  		for _, s := range strings.Fields(archs) {
  55  			if s == "amd64" {
  56  				compatFreeBSD32 = true
  57  				break
  58  			}
  59  		}
  60  	}
  61  }
  62  
  63  func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
  64  	sa.Len = sizeofSockaddrInet6
  65  	sa.Family = syscall.AF_INET6
  66  	copy(sa.Addr[:], ip)
  67  	sa.Scope_id = uint32(i)
  68  }
  69  
  70  func (pi *inet6Pktinfo) setIfindex(i int) {
  71  	pi.Ifindex = uint32(i)
  72  }
  73  
  74  func (mreq *ipv6Mreq) setIfindex(i int) {
  75  	mreq.Interface = uint32(i)
  76  }
  77  
  78  func (gr *groupReq) setGroup(grp net.IP) {
  79  	sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
  80  	sa.Len = sizeofSockaddrInet6
  81  	sa.Family = syscall.AF_INET6
  82  	copy(sa.Addr[:], grp)
  83  }
  84  
  85  func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
  86  	sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
  87  	sa.Len = sizeofSockaddrInet6
  88  	sa.Family = syscall.AF_INET6
  89  	copy(sa.Addr[:], grp)
  90  	sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
  91  	sa.Len = sizeofSockaddrInet6
  92  	sa.Family = syscall.AF_INET6
  93  	copy(sa.Addr[:], src)
  94  }
  95