sys_zos.go

Documentation: golang.org/x/net/ipv6

     1  // Copyright 2020 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  	"golang.org/x/net/internal/socket"
    14  
    15  	"golang.org/x/sys/unix"
    16  )
    17  
    18  var (
    19  	ctlOpts = [ctlMax]ctlOpt{
    20  		ctlHopLimit:   {unix.IPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
    21  		ctlPacketInfo: {unix.IPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
    22  		ctlPathMTU:    {unix.IPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
    23  	}
    24  
    25  	sockOpts = map[int]*sockOpt{
    26  		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_TCLASS, Len: 4}},
    27  		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_UNICAST_HOPS, Len: 4}},
    28  		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_IF, Len: 4}},
    29  		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_HOPS, Len: 4}},
    30  		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_MULTICAST_LOOP, Len: 4}},
    31  		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVTCLASS, Len: 4}},
    32  		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVHOPLIMIT, Len: 4}},
    33  		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVPKTINFO, Len: 4}},
    34  		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_RECVPATHMTU, Len: 4}},
    35  		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.IPV6_CHECKSUM, Len: 4}},
    36  		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: unix.ICMP6_FILTER, Len: sizeofICMPv6Filter}},
    37  		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
    38  		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
    39  		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    40  		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    41  		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    42  		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: unix.MCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
    43  	}
    44  )
    45  
    46  func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
    47  	sa.Family = syscall.AF_INET6
    48  	copy(sa.Addr[:], ip)
    49  	sa.Scope_id = uint32(i)
    50  }
    51  
    52  func (pi *inet6Pktinfo) setIfindex(i int) {
    53  	pi.Ifindex = uint32(i)
    54  }
    55  
    56  func (gr *groupReq) setGroup(grp net.IP) {
    57  	sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
    58  	sa.Family = syscall.AF_INET6
    59  	sa.Len = sizeofSockaddrInet6
    60  	copy(sa.Addr[:], grp)
    61  }
    62  
    63  func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
    64  	sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
    65  	sa.Family = syscall.AF_INET6
    66  	sa.Len = sizeofSockaddrInet6
    67  	copy(sa.Addr[:], grp)
    68  	sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
    69  	sa.Family = syscall.AF_INET6
    70  	sa.Len = sizeofSockaddrInet6
    71  	copy(sa.Addr[:], src)
    72  }
    73
View as plain text