Tomasz Wasilczyk | 8732967 | 2019-07-12 11:43:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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 | #pragma once |
| 18 | |
Tomasz Wasilczyk | a987273 | 2020-06-02 18:03:27 -0700 | [diff] [blame] | 19 | #include "nlbuf.h" |
| 20 | |
Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame^] | 21 | #include <linux/can.h> |
| 22 | #include <net/if.h> |
| 23 | |
Tomasz Wasilczyk | 8732967 | 2019-07-12 11:43:00 -0700 | [diff] [blame] | 24 | #include <string> |
| 25 | |
Tomasz Wasilczyk | 55f2193 | 2019-12-20 09:20:24 -0800 | [diff] [blame] | 26 | namespace android::netdevice { |
Tomasz Wasilczyk | 8732967 | 2019-07-12 11:43:00 -0700 | [diff] [blame] | 27 | |
Tomasz Wasilczyk | a5c83a5 | 2020-06-16 15:58:19 -0700 | [diff] [blame^] | 28 | namespace socketparams { |
| 29 | |
| 30 | struct Params { |
| 31 | int domain; |
| 32 | int type; |
| 33 | int protocol; |
| 34 | }; |
| 35 | |
| 36 | constexpr Params general = {AF_INET, SOCK_DGRAM, 0}; |
| 37 | constexpr Params can = {PF_CAN, SOCK_RAW, CAN_RAW}; |
| 38 | |
| 39 | extern Params current; |
| 40 | |
| 41 | } // namespace socketparams |
| 42 | |
Tomasz Wasilczyk | 8732967 | 2019-07-12 11:43:00 -0700 | [diff] [blame] | 43 | /** |
| 44 | * Returns the index of a given network interface. |
| 45 | * |
| 46 | * If the syscall to check the index fails with other error than ENODEV, it gets logged and the |
| 47 | * return value indicates the interface doesn't exists. |
| 48 | * |
| 49 | * \param ifname Interface to check |
| 50 | * \return Interface index, or 0 if the interface doesn't exist |
| 51 | */ |
| 52 | unsigned int nametoindex(const std::string& ifname); |
| 53 | |
Tomasz Wasilczyk | a987273 | 2020-06-02 18:03:27 -0700 | [diff] [blame] | 54 | /** |
| 55 | * Sanitize a string of unknown contents. |
| 56 | * |
| 57 | * Trims the string to the first '\0' character and replaces all non-printable characters with '?'. |
| 58 | */ |
| 59 | std::string sanitize(std::string str); |
| 60 | |
| 61 | /** |
| 62 | * Calculates a (optionally running) CRC16 checksum. |
| 63 | * |
| 64 | * CRC16 isn't a strong checksum, but is good for quick comparison purposes. |
| 65 | * One benefit (and also a drawback too) is that all-zero payloads with any length will |
| 66 | * always have a checksum of 0x0000. |
| 67 | * |
| 68 | * \param data Buffer to calculate checksum for |
| 69 | * \param crc Previous CRC16 value to continue calculating running checksum |
| 70 | * \return CRC16 checksum |
| 71 | */ |
| 72 | uint16_t crc16(const nlbuf<uint8_t> data, uint16_t crc = 0); |
| 73 | |
Tomasz Wasilczyk | 55f2193 | 2019-12-20 09:20:24 -0800 | [diff] [blame] | 74 | } // namespace android::netdevice |