| // +build go1.6, !go1.9 |
| |
| /* |
| * |
| * Copyright 2018 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package dns |
| |
| import ( |
| "fmt" |
| "net" |
| |
| "golang.org/x/net/context" |
| ) |
| |
| var ( |
| defaultResolver netResolver = &preGo19Resolver{} |
| ) |
| |
| type preGo19Resolver struct { |
| } |
| |
| func (*preGo19Resolver) LookupHost(ctx context.Context, host string) ([]string, error) { |
| return net.LookupHost(host) |
| } |
| |
| func (*preGo19Resolver) LookupSRV(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) { |
| return net.LookupSRV(service, proto, name) |
| } |
| |
| func (*preGo19Resolver) LookupTXT(ctx context.Context, name string) ([]string, error) { |
| return net.LookupTXT(name) |
| } |
| |
| var customAuthorityResolver = func(authority string) (netResolver, error) { |
| return nil, fmt.Errorf("Default DNS resolver does not support custom DNS server with go < 1.9") |
| } |