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/*
* 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
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