| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // ----------------------------------------------------------------------------- |
| // TODO - This should be replaced with BpfUtils in bpf_headers. |
| // Currently, bpf_headers contains a bunch requirements it doesn't actually provide, such as a |
| // non-ndk liblog version, and some version of libbase. libtcutils does not have access to either of |
| // these, so I think this will have to wait until we figure out a way around this. |
| // |
| // In the mean time copying verbatim from: |
| // frameworks/libs/net/common/native/bpf_headers |
| |
| #pragma once |
| |
| #include <stdio.h> |
| #include <sys/utsname.h> |
| |
| #define KVER(a, b, c) (((a) << 24) + ((b) << 16) + (c)) |
| |
| namespace android { |
| |
| static inline unsigned kernelVersion() { |
| struct utsname buf; |
| int ret = uname(&buf); |
| if (ret) |
| return 0; |
| |
| unsigned kver_major; |
| unsigned kver_minor; |
| unsigned kver_sub; |
| char discard; |
| ret = sscanf(buf.release, "%u.%u.%u%c", &kver_major, &kver_minor, &kver_sub, |
| &discard); |
| // Check the device kernel version |
| if (ret < 3) |
| return 0; |
| |
| return KVER(kver_major, kver_minor, kver_sub); |
| } |
| |
| static inline bool isAtLeastKernelVersion(unsigned major, unsigned minor, |
| unsigned sub) { |
| return kernelVersion() >= KVER(major, minor, sub); |
| } |
| |
| } // namespace android |