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// Copyright 2009 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.

// Unix domain sockets

package net

// UnixAddr represents the address of a Unix domain socket end point.
type UnixAddr struct {
        Name string
        Net  string
}

// Network returns the address's network name, "unix" or "unixgram".
func (a *UnixAddr) Network() string {
        return a.Net
}

func (a *UnixAddr) String() string {
        if a == nil {
                return "<nil>"
        }
        return a.Name
}

func (a *UnixAddr) toAddr() Addr {
        if a == nil { // nil *UnixAddr
                return nil // nil interface
        }
        return a
}

// ResolveUnixAddr parses addr as a Unix domain socket address.
// The string net gives the network name, "unix", "unixgram" or
// "unixpacket".
func ResolveUnixAddr(net, addr string) (*UnixAddr, error) {
        switch net {
        case "unix":
        case "unixpacket":
        case "unixgram":
        default:
                return nil, UnknownNetworkError(net)
        }
        return &UnixAddr{addr, net}, nil
}