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 package syscall
   8
   9 const SizeofSockaddrInet4 = 16
  10 const SizeofSockaddrInet6 = 28
  11 const SizeofSockaddrUnix = 110
  12
  13 type RawSockaddrInet4 struct {
  14         Len    uint8
  15         Family uint8
  16         Port   uint16
  17         Addr   [4]byte /* in_addr */
  18         Zero   [8]uint8
  19 }
  20
  21 func (sa *RawSockaddrInet4) setLen() Socklen_t {
  22         sa.Len = SizeofSockaddrInet4
  23         return SizeofSockaddrInet4
  24 }
  25
  26 type RawSockaddrInet6 struct {
  27         Len      uint8
  28         Family   uint8
  29         Port     uint16
  30         Flowinfo uint32
  31         Addr     [16]byte /* in6_addr */
  32         Scope_id uint32
  33 }
  34
  35 func (sa *RawSockaddrInet6) setLen() Socklen_t {
  36         sa.Len = SizeofSockaddrInet6
  37         return SizeofSockaddrInet6
  38 }
  39
  40 type RawSockaddrUnix struct {
  41         Len    uint8
  42         Family uint8
  43         Path   [108]int8
  44 }
  45
  46 func (sa *RawSockaddrUnix) setLen(n int) {
  47         sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL.
  48 }
  49
  50 func (sa *RawSockaddrUnix) getLen() (int, error) {
  51         if sa.Len < 3 || sa.Len > SizeofSockaddrUnix {
  52                 return 0, EINVAL
  53         }
  54         n := int(sa.Len) - 3 // subtract leading Family, Len, terminating NUL.
  55         for i := 0; i < n; i++ {
  56                 if sa.Path[i] == 0 {
  57                         // found early NUL; assume Len is overestimating.
  58                         n = i
  59                         break
  60                 }
  61         }
  62         return n, nil
  63 }
  64
  65 func (sa *RawSockaddrUnix) adjustAbstract(sl Socklen_t) Socklen_t {
  66         return sl
  67 }
  68
  69 type RawSockaddr struct {
  70         Len    uint8
  71         Family uint8
  72         Data   [14]int8
  73 }
  74
  75 // BindToDevice binds the socket associated with fd to device.
  76 func BindToDevice(fd int, device string) (err error) {
  77         return ENOSYS
  78 }
  79
  80 func anyToSockaddrOS(rsa *RawSockaddrAny) (Sockaddr, error) {
  81         return nil, EAFNOSUPPORT
  82 }