Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2020 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "ifreqs.h" |
| 18 | |
| 19 | #include "common.h" |
| 20 | |
| 21 | #include <android-base/logging.h> |
| 22 | #include <android-base/unique_fd.h> |
| 23 | |
Tomasz Wasilczyk | 2aa1a12 | 2020-07-20 14:03:05 -0700 | [diff] [blame] | 24 | #include <map> |
| 25 | |
Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame] | 26 | namespace android::netdevice::ifreqs { |
| 27 | |
Tomasz Wasilczyk | 2aa1a12 | 2020-07-20 14:03:05 -0700 | [diff] [blame] | 28 | static constexpr int defaultSocketDomain = AF_INET; |
| 29 | std::atomic_int socketDomain = defaultSocketDomain; |
| 30 | |
| 31 | struct SocketParams { |
| 32 | int domain; |
| 33 | int type; |
| 34 | int protocol; |
| 35 | }; |
| 36 | |
| 37 | static const std::map<int, SocketParams> socketParams = { |
| 38 | {AF_INET, {AF_INET, SOCK_DGRAM, 0}}, |
| 39 | {AF_CAN, {AF_CAN, SOCK_RAW, CAN_RAW}}, |
| 40 | }; |
| 41 | |
| 42 | static SocketParams getSocketParams(int domain) { |
| 43 | if (socketParams.count(domain)) return socketParams.find(domain)->second; |
| 44 | |
| 45 | auto params = socketParams.find(defaultSocketDomain)->second; |
| 46 | params.domain = domain; |
| 47 | return params; |
| 48 | } |
| 49 | |
Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame] | 50 | bool send(unsigned long request, struct ifreq& ifr) { |
Tomasz Wasilczyk | 2aa1a12 | 2020-07-20 14:03:05 -0700 | [diff] [blame] | 51 | const auto sp = getSocketParams(socketDomain); |
| 52 | base::unique_fd sock(socket(sp.domain, sp.type, sp.protocol)); |
Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame] | 53 | if (!sock.ok()) { |
| 54 | LOG(ERROR) << "Can't create socket"; |
| 55 | return false; |
| 56 | } |
| 57 | |
| 58 | if (ioctl(sock.get(), request, &ifr) < 0) { |
| 59 | PLOG(ERROR) << "ioctl(" << std::hex << request << std::dec << ") failed"; |
| 60 | return false; |
| 61 | } |
| 62 | |
| 63 | return true; |
| 64 | } |
| 65 | |
| 66 | struct ifreq fromName(const std::string& ifname) { |
| 67 | struct ifreq ifr = {}; |
| 68 | strlcpy(ifr.ifr_name, ifname.c_str(), IF_NAMESIZE); |
| 69 | return ifr; |
| 70 | } |
| 71 | |
| 72 | } // namespace android::netdevice::ifreqs |