libgo/syscalls/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, int) {
  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, 0
  63 }
  64
  65 type RawSockaddr struct {
  66         Len uint8;
  67         Family uint8;
  68         Data [14]int8;
  69 }
  70
  71 // BindToDevice binds the socket associated with fd to device.
  72 func BindToDevice(fd int, device string) (errno int) {
  73         return ENOSYS
  74 }