sys_zos.go raw

   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 ipv4
   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  		ctlPacketInfo: {unix.IP_PKTINFO, sizeofInetPktinfo, marshalPacketInfo, parsePacketInfo},
  21  	}
  22  
  23  	sockOpts = map[int]*sockOpt{
  24  		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_TTL, Len: 1}},
  25  		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_IF, Len: 4}},
  26  		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_LOOP, Len: 1}},
  27  		ssoPacketInfo:         {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVPKTINFO, Len: 4}},
  28  		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  29  		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  30  		ssoJoinSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  31  		ssoLeaveSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  32  		ssoBlockSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  33  		ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  34  	}
  35  )
  36  
  37  func (pi *inetPktinfo) setIfindex(i int) {
  38  	pi.Ifindex = uint32(i)
  39  }
  40  
  41  func (gr *groupReq) setGroup(grp net.IP) {
  42  	sa := (*sockaddrInet4)(unsafe.Pointer(&gr.Group))
  43  	sa.Family = syscall.AF_INET
  44  	sa.Len = sizeofSockaddrInet4
  45  	copy(sa.Addr[:], grp)
  46  }
  47  
  48  func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
  49  	sa := (*sockaddrInet4)(unsafe.Pointer(&gsr.Group))
  50  	sa.Family = syscall.AF_INET
  51  	sa.Len = sizeofSockaddrInet4
  52  	copy(sa.Addr[:], grp)
  53  	sa = (*sockaddrInet4)(unsafe.Pointer(&gsr.Source))
  54  	sa.Family = syscall.AF_INET
  55  	sa.Len = sizeofSockaddrInet4
  56  	copy(sa.Addr[:], src)
  57  }
  58