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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.
// UDP sockets
package net
import "errors"
var ErrWriteToConnected = errors.New("use of WriteTo with pre-connected UDP")
// UDPAddr represents the address of a UDP end point.
type UDPAddr struct {
IP IP
Port int
Zone string // IPv6 scoped addressing zone
}
// Network returns the address's network name, "udp".
func (a *UDPAddr) Network() string { return "udp" }
func (a *UDPAddr) String() string {
if a == nil {
return "<nil>"
}
return JoinHostPort(a.IP.String(), itoa(a.Port))
}
// ResolveUDPAddr parses addr as a UDP address of the form
// host:port and resolves domain names or port names to
// numeric addresses on the network net, which must be "udp",
// "udp4" or "udp6". A literal IPv6 host address must be
// enclosed in square brackets, as in "[::]:80".
func ResolveUDPAddr(net, addr string) (*UDPAddr, error) {
switch net {
case "udp", "udp4", "udp6":
case "": // a hint wildcard for Go 1.0 undocumented behavior
net = "udp"
default:
return nil, UnknownNetworkError(net)
}
a, err := resolveInternetAddr(net, addr, noDeadline)
if err != nil {
return nil, err
}
return a.(*UDPAddr), nil
}
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