// 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.

package syscall

const SizeofSockaddrInet4 = 16
const SizeofSockaddrInet6 = 28
const SizeofSockaddrUnix = 110

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, int) {
	if sa.Len < 3 || sa.Len > SizeofSockaddrUnix {
		return 0, EINVAL
	}
	n := int(sa.Len) - 3 // subtract leading Family, Len, terminating NUL.
	for i := 0; i < n; i++ {
		if sa.Path[i] == 0 {
			// found early NUL; assume Len is overestimating.
			n = i
			break
		}
	}
	return n, 0
}

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) (errno int) {
	return ENOSYS
}

func anyToSockaddrOS(rsa *RawSockaddrAny) (Sockaddr, int) {
	return nil, EAFNOSUPPORT;
}