github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/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  	"golang.org/x/net/internal/iana"
    13  )
    14  
    15  type sysSockoptLen int32
    16  
    17  var (
    18  	ctlOpts = [ctlMax]ctlOpt{
    19  		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
    20  		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
    21  		ctlPacketInfo:   {sysIPV6_PKTINFO, sysSizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
    22  		ctlPathMTU:      {sysIPV6_PATHMTU, sysSizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
    23  	}
    24  
    25  	sockOpts = [ssoMax]sockOpt{
    26  		ssoTrafficClass:        {iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt},
    27  		ssoHopLimit:            {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
    28  		ssoMulticastInterface:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
    29  		ssoMulticastHopLimit:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
    30  		ssoMulticastLoopback:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
    31  		ssoReceiveTrafficClass: {iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt},
    32  		ssoReceiveHopLimit:     {iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt},
    33  		ssoReceivePacketInfo:   {iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt},
    34  		ssoReceivePathMTU:      {iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt},
    35  		ssoPathMTU:             {iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo},
    36  		ssoChecksum:            {iana.ProtocolReserved, sysIPV6_CHECKSUM, ssoTypeInt},
    37  		ssoICMPFilter:          {iana.ProtocolIPv6ICMP, sysICMPV6_FILTER, ssoTypeICMPFilter},
    38  		ssoJoinGroup:           {iana.ProtocolIPv6, sysMCAST_JOIN_GROUP, ssoTypeGroupReq},
    39  		ssoLeaveGroup:          {iana.ProtocolIPv6, sysMCAST_LEAVE_GROUP, ssoTypeGroupReq},
    40  		ssoJoinSourceGroup:     {iana.ProtocolIPv6, sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq},
    41  		ssoLeaveSourceGroup:    {iana.ProtocolIPv6, sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq},
    42  		ssoBlockSourceGroup:    {iana.ProtocolIPv6, sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq},
    43  		ssoUnblockSourceGroup:  {iana.ProtocolIPv6, sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq},
    44  	}
    45  )
    46  
    47  func (sa *sysSockaddrInet6) 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 *sysInet6Pktinfo) setIfindex(i int) {
    54  	pi.Ifindex = int32(i)
    55  }
    56  
    57  func (mreq *sysIPv6Mreq) setIfindex(i int) {
    58  	mreq.Ifindex = int32(i)
    59  }
    60  
    61  func (gr *sysGroupReq) setGroup(grp net.IP) {
    62  	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Group))
    63  	sa.Family = syscall.AF_INET6
    64  	copy(sa.Addr[:], grp)
    65  }
    66  
    67  func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
    68  	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Group))
    69  	sa.Family = syscall.AF_INET6
    70  	copy(sa.Addr[:], grp)
    71  	sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Source))
    72  	sa.Family = syscall.AF_INET6
    73  	copy(sa.Addr[:], src)
    74  }