Scott Baker | 2d89798 | 2019-09-24 11:50:08 -0700 | [diff] [blame^] | 1 | // +build !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 | |
| 21 | package channelz |
| 22 | |
| 23 | import ( |
| 24 | "syscall" |
| 25 | |
| 26 | "golang.org/x/sys/unix" |
| 27 | ) |
| 28 | |
| 29 | // SocketOptionData defines the struct to hold socket option data, and related |
| 30 | // getter function to obtain info from fd. |
| 31 | type SocketOptionData struct { |
| 32 | Linger *unix.Linger |
| 33 | RecvTimeout *unix.Timeval |
| 34 | SendTimeout *unix.Timeval |
| 35 | TCPInfo *unix.TCPInfo |
| 36 | } |
| 37 | |
| 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 { |
| 42 | s.Linger = v |
| 43 | } |
| 44 | if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVTIMEO); err == nil { |
| 45 | s.RecvTimeout = v |
| 46 | } |
| 47 | if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDTIMEO); err == nil { |
| 48 | s.SendTimeout = v |
| 49 | } |
| 50 | if v, err := unix.GetsockoptTCPInfo(int(fd), syscall.SOL_TCP, syscall.TCP_INFO); err == nil { |
| 51 | s.TCPInfo = v |
| 52 | } |
| 53 | } |