github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/ipv6/sys_darwin.go (about)

     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  	"syscall"
    10  	"unsafe"
    11  
    12  	"golang.org/x/net/internal/iana"
    13  )
    14  
    15  type sysSockoptLen int32
    16  
    17  var (
    18  	ctlOpts = [ctlMax]ctlOpt{
    19  		ctlHopLimit:   {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
    20  		ctlPacketInfo: {sysIPV6_2292PKTINFO, sysSizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
    21  	}
    22  
    23  	sockOpts = [ssoMax]sockOpt{
    24  		ssoHopLimit:           {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
    25  		ssoMulticastInterface: {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
    26  		ssoMulticastHopLimit:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
    27  		ssoMulticastLoopback:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
    28  		ssoReceiveHopLimit:    {iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, ssoTypeInt},
    29  		ssoReceivePacketInfo:  {iana.ProtocolIPv6, sysIPV6_2292PKTINFO, ssoTypeInt},
    30  		ssoChecksum:           {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
    31  		ssoICMPFilter:         {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
    32  		ssoJoinGroup:          {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
    33  		ssoLeaveGroup:         {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
    34  	}
    35  )
    36  
    37  func init() {
    38  	// Seems like kern.osreldate is veiled on latest OS X. We use
    39  	// kern.osrelease instead.
    40  	osver, err := syscall.Sysctl("kern.osrelease")
    41  	if err != nil {
    42  		return
    43  	}
    44  	var i int
    45  	for i = range osver {
    46  		if osver[i] == '.' {
    47  			break
    48  		}
    49  	}
    50  	// The IP_PKTINFO and protocol-independent multicast API were
    51  	// introduced in OS X 10.7 (Darwin 11.0.0). But it looks like
    52  	// those features require OS X 10.8 (Darwin 12.0.0) and above.
    53  	// See http://support.apple.com/kb/HT1633.
    54  	if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '2' {
    55  		ctlOpts[ctlTrafficClass].name = sysIPV6_TCLASS
    56  		ctlOpts[ctlTrafficClass].length = 4
    57  		ctlOpts[ctlTrafficClass].marshal = marshalTrafficClass
    58  		ctlOpts[ctlTrafficClass].parse = parseTrafficClass
    59  		ctlOpts[ctlHopLimit].name = sysIPV6_HOPLIMIT
    60  		ctlOpts[ctlHopLimit].marshal = marshalHopLimit
    61  		ctlOpts[ctlPacketInfo].name = sysIPV6_PKTINFO
    62  		ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
    63  		ctlOpts[ctlNextHop].name = sysIPV6_NEXTHOP
    64  		ctlOpts[ctlNextHop].length = sysSizeofSockaddrInet6
    65  		ctlOpts[ctlNextHop].marshal = marshalNextHop
    66  		ctlOpts[ctlNextHop].parse = parseNextHop
    67  		ctlOpts[ctlPathMTU].name = sysIPV6_PATHMTU
    68  		ctlOpts[ctlPathMTU].length = sysSizeofIPv6Mtuinfo
    69  		ctlOpts[ctlPathMTU].marshal = marshalPathMTU
    70  		ctlOpts[ctlPathMTU].parse = parsePathMTU
    71  		sockOpts[ssoTrafficClass].level = iana.ProtocolIPv6
    72  		sockOpts[ssoTrafficClass].name = sysIPV6_TCLASS
    73  		sockOpts[ssoTrafficClass].typ = ssoTypeInt
    74  		sockOpts[ssoReceiveTrafficClass].level = iana.ProtocolIPv6
    75  		sockOpts[ssoReceiveTrafficClass].name = sysIPV6_RECVTCLASS
    76  		sockOpts[ssoReceiveTrafficClass].typ = ssoTypeInt
    77  		sockOpts[ssoReceiveHopLimit].name = sysIPV6_RECVHOPLIMIT
    78  		sockOpts[ssoReceivePacketInfo].name = sysIPV6_RECVPKTINFO
    79  		sockOpts[ssoReceivePathMTU].level = iana.ProtocolIPv6
    80  		sockOpts[ssoReceivePathMTU].name = sysIPV6_RECVPATHMTU
    81  		sockOpts[ssoReceivePathMTU].typ = ssoTypeInt
    82  		sockOpts[ssoPathMTU].level = iana.ProtocolIPv6
    83  		sockOpts[ssoPathMTU].name = sysIPV6_PATHMTU
    84  		sockOpts[ssoPathMTU].typ = ssoTypeMTUInfo
    85  		sockOpts[ssoJoinGroup].name = sysMCAST_JOIN_GROUP
    86  		sockOpts[ssoJoinGroup].typ = ssoTypeGroupReq
    87  		sockOpts[ssoLeaveGroup].name = sysMCAST_LEAVE_GROUP
    88  		sockOpts[ssoLeaveGroup].typ = ssoTypeGroupReq
    89  		sockOpts[ssoJoinSourceGroup].level = iana.ProtocolIPv6
    90  		sockOpts[ssoJoinSourceGroup].name = sysMCAST_JOIN_SOURCE_GROUP
    91  		sockOpts[ssoJoinSourceGroup].typ = ssoTypeGroupSourceReq
    92  		sockOpts[ssoLeaveSourceGroup].level = iana.ProtocolIPv6
    93  		sockOpts[ssoLeaveSourceGroup].name = sysMCAST_LEAVE_SOURCE_GROUP
    94  		sockOpts[ssoLeaveSourceGroup].typ = ssoTypeGroupSourceReq
    95  		sockOpts[ssoBlockSourceGroup].level = iana.ProtocolIPv6
    96  		sockOpts[ssoBlockSourceGroup].name = sysMCAST_BLOCK_SOURCE
    97  		sockOpts[ssoBlockSourceGroup].typ = ssoTypeGroupSourceReq
    98  		sockOpts[ssoUnblockSourceGroup].level = iana.ProtocolIPv6
    99  		sockOpts[ssoUnblockSourceGroup].name = sysMCAST_UNBLOCK_SOURCE
   100  		sockOpts[ssoUnblockSourceGroup].typ = ssoTypeGroupSourceReq
   101  	}
   102  }
   103  
   104  func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
   105  	sa.Len = sysSizeofSockaddrInet6
   106  	sa.Family = syscall.AF_INET6
   107  	copy(sa.Addr[:], ip)
   108  	sa.Scope_id = uint32(i)
   109  }
   110  
   111  func (pi *sysInet6Pktinfo) setIfindex(i int) {
   112  	pi.Ifindex = uint32(i)
   113  }
   114  
   115  func (mreq *sysIPv6Mreq) setIfindex(i int) {
   116  	mreq.Interface = uint32(i)
   117  }
   118  
   119  func (gr *sysGroupReq) setGroup(grp net.IP) {
   120  	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Pad_cgo_0[0]))
   121  	sa.Len = sysSizeofSockaddrInet6
   122  	sa.Family = syscall.AF_INET6
   123  	copy(sa.Addr[:], grp)
   124  }
   125  
   126  func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
   127  	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_0[0]))
   128  	sa.Len = sysSizeofSockaddrInet6
   129  	sa.Family = syscall.AF_INET6
   130  	copy(sa.Addr[:], grp)
   131  	sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_1[0]))
   132  	sa.Len = sysSizeofSockaddrInet6
   133  	sa.Family = syscall.AF_INET6
   134  	copy(sa.Addr[:], src)
   135  }