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// Copyright 2018 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.
//go:build unix || js || wasip1 || windows
package net
import (
// A sockaddr represents a TCP, UDP, IP or Unix network endpoint
// address that can be converted into a syscall.Sockaddr.
type sockaddr interface {
// family returns the platform-dependent address family
// identifier.
family() int
// isWildcard reports whether the address is a wildcard
// address.
isWildcard() bool
// sockaddr returns the address converted into a syscall
// sockaddr type that implements syscall.Sockaddr
// interface. It returns a nil interface when the address is
// nil.
sockaddr(family int) (syscall.Sockaddr, error)
// toLocal maps the zero address to a local system address ( or ::1)
toLocal(net string) sockaddr
func (fd *netFD) addrFunc() func(syscall.Sockaddr) Addr {
switch {
case syscall.AF_INET, syscall.AF_INET6:
switch fd.sotype {
case syscall.SOCK_STREAM:
return sockaddrToTCP
case syscall.SOCK_DGRAM:
return sockaddrToUDP
case syscall.SOCK_RAW:
return sockaddrToIP
case syscall.AF_UNIX:
switch fd.sotype {
case syscall.SOCK_STREAM:
return sockaddrToUnix
case syscall.SOCK_DGRAM:
return sockaddrToUnixgram
case syscall.SOCK_SEQPACKET:
return sockaddrToUnixpacket
return func(syscall.Sockaddr) Addr { return nil }