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