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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.
// TCP sockets
package net
import (
// TCPAddr represents the address of a TCP end point.
type TCPAddr struct {
Port int
// Network returns the address's network name, "tcp".
func (a *TCPAddr) Network() string { return "tcp" }
func (a *TCPAddr) String() string {
if a == nil {
return "<nil>"
return JoinHostPort(a.IP.String(), itoa(a.Port))
// ResolveTCPAddr parses addr as a TCP address of the form
// host:port and resolves domain names or port names to
// numeric addresses on the network net, which must be "tcp",
// "tcp4" or "tcp6". A literal IPv6 host address must be
// enclosed in square brackets, as in "[::]:80".
func ResolveTCPAddr(net, addr string) (*TCPAddr, os.Error) {
ip, port, err := hostPortToIP(net, addr)
if err != nil {
return nil, err
return &TCPAddr{ip, port}, nil