5 * Copyright 2018 gRPC authors.
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
26 "golang.org/x/sys/unix"
29 // SocketOptionData defines the struct to hold socket option data, and related
30 // getter function to obtain info from fd.
31 type SocketOptionData struct {
33 RecvTimeout *unix.Timeval
34 SendTimeout *unix.Timeval
38 // Getsockopt defines the function to get socket options requested by channelz.
39 // It is to be passed to syscall.RawConn.Control().
40 func (s *SocketOptionData) Getsockopt(fd uintptr) {
41 if v, err := unix.GetsockoptLinger(int(fd), syscall.SOL_SOCKET, syscall.SO_LINGER); err == nil {
44 if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVTIMEO); err == nil {
47 if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDTIMEO); err == nil {
50 if v, err := unix.GetsockoptTCPInfo(int(fd), syscall.SOL_TCP, syscall.TCP_INFO); err == nil {