141 lines
3 KiB
Go
141 lines
3 KiB
Go
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// socket_bsd.go -- Socket handling specific to *BSD based systems.
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd openbsd netbsd
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package syscall
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import "unsafe"
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const SizeofSockaddrInet4 = 16
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const SizeofSockaddrInet6 = 28
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const SizeofSockaddrUnix = 110
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const SizeofSockaddrDatalink = 20
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type RawSockaddrInet4 struct {
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Len uint8
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Family uint8
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Port uint16
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Addr [4]byte /* in_addr */
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Zero [8]uint8
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}
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func (sa *RawSockaddrInet4) setLen() Socklen_t {
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sa.Len = SizeofSockaddrInet4
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return SizeofSockaddrInet4
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}
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type RawSockaddrInet6 struct {
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Len uint8
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Family uint8
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Port uint16
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Flowinfo uint32
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Addr [16]byte /* in6_addr */
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Scope_id uint32
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}
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func (sa *RawSockaddrInet6) setLen() Socklen_t {
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sa.Len = SizeofSockaddrInet6
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return SizeofSockaddrInet6
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}
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type RawSockaddrUnix struct {
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Len uint8
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Family uint8
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Path [108]int8
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}
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func (sa *RawSockaddrUnix) setLen(n int) {
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sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL.
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}
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func (sa *RawSockaddrUnix) getLen() (int, error) {
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if sa.Len < 2 || sa.Len > SizeofSockaddrUnix {
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return 0, EINVAL
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}
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// Some BSDs include the trailing NUL in the length, whereas
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// others do not. Work around this by subtracting the leading
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// family and len. The path is then scanned to see if a NUL
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// terminator still exists within the length.
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n := int(sa.Len) - 2 // subtract leading Family, Len
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for i := 0; i < n; i++ {
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if sa.Path[i] == 0 {
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// found early NUL; assume Len included the NUL
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// or was overestimating.
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n = i
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break
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}
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}
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return n, nil
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}
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func (sa *RawSockaddrUnix) adjustAbstract(sl Socklen_t) Socklen_t {
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return sl
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}
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type SockaddrDatalink struct {
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Len uint8
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Family uint8
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Index uint16
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Type uint8
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Nlen uint8
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Alen uint8
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Slen uint8
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Data [12]int8
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raw RawSockaddrDatalink
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}
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func (sa *SockaddrDatalink) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
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if sa.Index == 0 {
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return nil, 0, EINVAL
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}
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sa.raw.Len = sa.Len
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sa.raw.Family = AF_LINK
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sa.raw.Index = sa.Index
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sa.raw.Type = sa.Type
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sa.raw.Nlen = sa.Nlen
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sa.raw.Alen = sa.Alen
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sa.raw.Slen = sa.Slen
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for i := 0; i < len(sa.raw.Data); i++ {
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sa.raw.Data[i] = sa.Data[i]
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}
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return (*RawSockaddrAny)(unsafe.Pointer(&sa.raw)), SizeofSockaddrDatalink, nil
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}
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type RawSockaddrDatalink struct {
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Len uint8
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Family uint8
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Index uint16
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Type uint8
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Nlen uint8
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Alen uint8
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Slen uint8
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Data [12]int8
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}
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type RawSockaddr struct {
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Len uint8
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Family uint8
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Data [14]int8
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}
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// BindToDevice binds the socket associated with fd to device.
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func BindToDevice(fd int, device string) (err error) {
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return ENOSYS
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}
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func anyToSockaddrOS(rsa *RawSockaddrAny) (Sockaddr, error) {
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return nil, EAFNOSUPPORT
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}
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func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) {
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var value IPv6MTUInfo
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vallen := Socklen_t(SizeofIPv6MTUInfo)
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err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
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return &value, err
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}
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