libgo/go/syscall/socket_bsd.go

   1 // socket_bsd.go -- Socket handling specific to *BSD based systems.
   2
   3 // Copyright 2010 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // +build darwin dragonfly freebsd hurd openbsd netbsd
   8
   9 package syscall
  10
  11 import "unsafe"
  12
  13 const SizeofSockaddrInet4 = 16
  14 const SizeofSockaddrInet6 = 28
  15 const SizeofSockaddrUnix = 110
  16
  17 type RawSockaddrInet4 struct {
  18         Len    uint8
  19         Family uint8
  20         Port   uint16
  21         Addr   [4]byte /* in_addr */
  22         Zero   [8]uint8
  23 }
  24
  25 func (sa *RawSockaddrInet4) setLen() Socklen_t {
  26         sa.Len = SizeofSockaddrInet4
  27         return SizeofSockaddrInet4
  28 }
  29
  30 type RawSockaddrInet6 struct {
  31         Len      uint8
  32         Family   uint8
  33         Port     uint16
  34         Flowinfo uint32
  35         Addr     [16]byte /* in6_addr */
  36         Scope_id uint32
  37 }
  38
  39 func (sa *RawSockaddrInet6) setLen() Socklen_t {
  40         sa.Len = SizeofSockaddrInet6
  41         return SizeofSockaddrInet6
  42 }
  43
  44 type RawSockaddrUnix struct {
  45         Len    uint8
  46         Family uint8
  47         Path   [108]int8
  48 }
  49
  50 func (sa *RawSockaddrUnix) setLen(n int) {
  51         sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL.
  52 }
  53
  54 func (sa *RawSockaddrUnix) getLen() (int, error) {
  55         if sa.Len < 3 || sa.Len > SizeofSockaddrUnix {
  56                 return 0, EINVAL
  57         }
  58         n := int(sa.Len) - 3 // subtract leading Family, Len, terminating NUL.
  59         for i := 0; i < n; i++ {
  60                 if sa.Path[i] == 0 {
  61                         // found early NUL; assume Len is overestimating.
  62                         n = i
  63                         break
  64                 }
  65         }
  66         return n, nil
  67 }
  68
  69 func (sa *RawSockaddrUnix) adjustAbstract(sl Socklen_t) Socklen_t {
  70         return sl
  71 }
  72
  73 type RawSockaddr struct {
  74         Len    uint8
  75         Family uint8
  76         Data   [14]int8
  77 }
  78
  79 // BindToDevice binds the socket associated with fd to device.
  80 func BindToDevice(fd int, device string) (err error) {
  81         return ENOSYS
  82 }
  83
  84 func anyToSockaddrOS(rsa *RawSockaddrAny) (Sockaddr, error) {
  85         return nil, EAFNOSUPPORT
  86 }
  87
  88 func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) {
  89         var value IPv6MTUInfo
  90         vallen := Socklen_t(SizeofIPv6MTUInfo)
  91         err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
  92         return &value, err
  93 }