// Copyright 2018 Joshua J Baker. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.

package internal

import (
	"net"
	"syscall"
)

// SockaddrToAddr returns a go/net friendly address
func SockaddrToAddr(sa syscall.Sockaddr) net.Addr {
	var a net.Addr
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		a = &net.TCPAddr{
			IP:   append([]byte{}, sa.Addr[:]...),
			Port: sa.Port,
		}
	case *syscall.SockaddrInet6:
		var zone string
		if sa.ZoneId != 0 {
			if ifi, err := net.InterfaceByIndex(int(sa.ZoneId)); err == nil {
				zone = ifi.Name
			}
		}
		if zone == "" && sa.ZoneId != 0 {
		}
		a = &net.TCPAddr{
			IP:   append([]byte{}, sa.Addr[:]...),
			Port: sa.Port,
			Zone: zone,
		}
	case *syscall.SockaddrUnix:
		a = &net.UnixAddr{Net: "unix", Name: sa.Name}
	}
	return a
}