vendor/golang.org/x/net/ipv4/sys_freebsd.go

   1 // Copyright 2014 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         "runtime"
  10         "strings"
  11         "syscall"
  12         "unsafe"
  13
  14         "golang.org/x/net/internal/iana"
  15         "golang.org/x/net/internal/socket"
  16 )
  17
  18 var (
  19         ctlOpts = [ctlMax]ctlOpt{
  20                 ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
  21                 ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
  22                 ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
  23         }
  24
  25         sockOpts = map[int]*sockOpt{
  26                 ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
  27                 ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
  28                 ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
  29                 ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
  30                 ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
  31                 ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
  32                 ssoReceiveDst:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
  33                 ssoReceiveInterface:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
  34                 ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
  35                 ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  36                 ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  37                 ssoJoinSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  38                 ssoLeaveSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  39                 ssoBlockSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  40                 ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  41         }
  42 )
  43
  44 func init() {
  45         freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
  46         if freebsdVersion >= 1000000 {
  47                 sockOpts[ssoMulticastInterface] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: sizeofIPMreqn}, typ: ssoTypeIPMreqn}
  48         }
  49         if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
  50                 archs, _ := syscall.Sysctl("kern.supported_archs")
  51                 for _, s := range strings.Fields(archs) {
  52                         if s == "amd64" {
  53                                 freebsd32o64 = true
  54                                 break
  55                         }
  56                 }
  57         }
  58 }
  59
  60 func (gr *groupReq) setGroup(grp net.IP) {
  61         sa := (*sockaddrInet)(unsafe.Pointer(&gr.Group))
  62         sa.Len = sizeofSockaddrInet
  63         sa.Family = syscall.AF_INET
  64         copy(sa.Addr[:], grp)
  65 }
  66
  67 func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
  68         sa := (*sockaddrInet)(unsafe.Pointer(&gsr.Group))
  69         sa.Len = sizeofSockaddrInet
  70         sa.Family = syscall.AF_INET
  71         copy(sa.Addr[:], grp)
  72         sa = (*sockaddrInet)(unsafe.Pointer(&gsr.Source))
  73         sa.Len = sizeofSockaddrInet
  74         sa.Family = syscall.AF_INET
  75         copy(sa.Addr[:], src)
  76 }