sys_freebsd.go

Documentation: golang.org/x/net/ipv6

     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
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