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