github.com/Andyfoo/golang/x/net@v0.0.0-20190901054642-57c1bf301704/ipv6/sys_linux.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  	"github.com/Andyfoo/golang/x/net/internal/iana"
    13  	"github.com/Andyfoo/golang/x/net/internal/socket"
    14  )
    15  
    16  var (
    17  	ctlOpts = [ctlMax]ctlOpt{
    18  		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
    19  		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
    20  		ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
    21  		ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
    22  	}
    23  
    24  	sockOpts = map[int]*sockOpt{
    25  		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
    26  		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
    27  		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
    28  		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
    29  		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
    30  		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
    31  		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
    32  		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
    33  		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
    34  		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
    35  		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolReserved, Name: sysIPV6_CHECKSUM, Len: 4}},
    36  		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMPV6_FILTER, Len: sizeofICMPv6Filter}},
    37  		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
    38  		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
    39  		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    40  		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    41  		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    42  		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    43  		ssoAttachFilter:        {Option: socket.Option{Level: sysSOL_SOCKET, Name: sysSO_ATTACH_FILTER, Len: sizeofSockFprog}},
    44  	}
    45  )
    46  
    47  func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
    48  	sa.Family = syscall.AF_INET6
    49  	copy(sa.Addr[:], ip)
    50  	sa.Scope_id = uint32(i)
    51  }
    52  
    53  func (pi *inet6Pktinfo) setIfindex(i int) {
    54  	pi.Ifindex = int32(i)
    55  }
    56  
    57  func (mreq *ipv6Mreq) setIfindex(i int) {
    58  	mreq.Ifindex = int32(i)
    59  }
    60  
    61  func (gr *groupReq) setGroup(grp net.IP) {
    62  	sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
    63  	sa.Family = syscall.AF_INET6
    64  	copy(sa.Addr[:], grp)
    65  }
    66  
    67  func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
    68  	sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
    69  	sa.Family = syscall.AF_INET6
    70  	copy(sa.Addr[:], grp)
    71  	sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
    72  	sa.Family = syscall.AF_INET6
    73  	copy(sa.Addr[:], src)
    74  }