ec0f7ac36f
The library provides an init function and an API for DNS resolver to query whether the application is allowed to send DNS query based on BPF maps settings. Bug: 288340533 Test: atest dns_helper_unit_test (with test CL) Change-Id: Ibfb383bfb074da2104a25aa4f04ebc32b22d11da
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/*
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* Copyright (C) 2023 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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#pragma once
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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/*
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* Perform any required initialization - including opening any required BPF maps. This function
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* needs to be called before using other functions of this library.
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*
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* Returns 0 on success, a negative POSIX error code (see errno.h) on other failures.
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*/
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int ADnsHelper_init();
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/*
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* The function reads bpf maps and returns whether the given uid has blocked networking or not. The
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* function is supported starting from Android T.
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*
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* |uid| is a Linux/Android UID to be queried. It is a combination of UserID and AppID.
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* |metered| indicates whether the uid is currently using a billing network.
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*
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* Returns 0(false)/1(true) on success, a negative POSIX error code (see errno.h) on other failures.
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*/
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int ADnsHelper_isUidNetworkingBlocked(uid_t uid, bool metered);
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__END_DECLS
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