1// +build !linux appengine
2
3/*
4 *
5 * Copyright 2018 gRPC authors.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 *     http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 */
20
21package channelz
22
23import (
24	"sync"
25
26	"google.golang.org/grpc/grpclog"
27)
28
29var once sync.Once
30
31// SocketOptionData defines the struct to hold socket option data, and related
32// getter function to obtain info from fd.
33// Windows OS doesn't support Socket Option
34type SocketOptionData struct {
35}
36
37// Getsockopt defines the function to get socket options requested by channelz.
38// It is to be passed to syscall.RawConn.Control().
39// Windows OS doesn't support Socket Option
40func (s *SocketOptionData) Getsockopt(fd uintptr) {
41	once.Do(func() {
42		grpclog.Warningln("Channelz: socket options are not supported on non-linux os and appengine.")
43	})
44}
45