51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"os"
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)
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// LookupHost looks up the given host using the local resolver.
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// It returns an array of that host's addresses.
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func LookupHost(host string) (addrs []string, err os.Error) {
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addrs, err, ok := cgoLookupHost(host)
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if !ok {
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addrs, err = goLookupHost(host)
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}
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return
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}
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// LookupIP looks up host using the local resolver.
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// It returns an array of that host's IPv4 and IPv6 addresses.
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func LookupIP(host string) (addrs []IP, err os.Error) {
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addrs, err, ok := cgoLookupIP(host)
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if !ok {
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addrs, err = goLookupIP(host)
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}
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return
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}
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// LookupPort looks up the port for the given network and service.
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func LookupPort(network, service string) (port int, err os.Error) {
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port, err, ok := cgoLookupPort(network, service)
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if !ok {
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port, err = goLookupPort(network, service)
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}
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return
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}
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// LookupCNAME returns the canonical DNS host for the given name.
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// Callers that do not care about the canonical name can call
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// LookupHost or LookupIP directly; both take care of resolving
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// the canonical name as part of the lookup.
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func LookupCNAME(name string) (cname string, err os.Error) {
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cname, err, ok := cgoLookupCNAME(name)
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if !ok {
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cname, err = goLookupCNAME(name)
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}
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return
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}
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