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109 lines
3.5 KiB
109 lines
3.5 KiB
4 months ago
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/**
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* Copyright (c) 2019, 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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#include "DnsResolver.h"
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#include <android-base/logging.h>
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#include "DnsProxyListener.h"
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#include "DnsResolverService.h"
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#include "DnsTlsDispatcher.h"
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#include "PrivateDnsConfiguration.h"
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#include "netd_resolv/resolv.h"
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#include "res_debug.h"
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#include "util.h"
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bool resolv_init(const ResolverNetdCallbacks* callbacks) {
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android::base::InitLogging(/*argv=*/nullptr);
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android::base::SetDefaultTag("libnetd_resolv");
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LOG(INFO) << __func__ << ": Initializing resolver";
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// TODO(b/170539625): restore log level to WARNING after clarifying flaky tests.
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resolv_set_log_severity(isUserDebugBuild() ? android::base::DEBUG : android::base::WARNING);
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using android::net::gApiLevel;
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gApiLevel = getApiLevel();
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using android::net::gResNetdCallbacks;
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gResNetdCallbacks.check_calling_permission = callbacks->check_calling_permission;
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gResNetdCallbacks.get_network_context = callbacks->get_network_context;
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gResNetdCallbacks.log = callbacks->log;
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if (gApiLevel >= 30) {
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gResNetdCallbacks.tagSocket = callbacks->tagSocket;
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gResNetdCallbacks.evaluate_domain_name = callbacks->evaluate_domain_name;
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}
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android::net::gDnsResolv = android::net::DnsResolver::getInstance();
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return android::net::gDnsResolv->start();
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}
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namespace android {
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namespace net {
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namespace {
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bool verifyCallbacks() {
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if (!(gResNetdCallbacks.check_calling_permission && gResNetdCallbacks.get_network_context &&
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gResNetdCallbacks.log)) {
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return false;
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}
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if (gApiLevel >= 30) {
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return gResNetdCallbacks.tagSocket != nullptr;
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}
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return true;
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}
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} // namespace
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DnsResolver* gDnsResolv = nullptr;
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ResolverNetdCallbacks gResNetdCallbacks;
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netdutils::Log gDnsResolverLog("dnsResolver");
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uint64_t gApiLevel = 0;
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DnsResolver* DnsResolver::getInstance() {
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// Instantiated on first use.
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static DnsResolver instance;
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return &instance;
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}
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DnsResolver::DnsResolver() {
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// TODO: make them member variables after fixing the circular dependency:
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// DnsTlsDispatcher.h -> resolv_private.h -> DnsResolver.h -> DnsTlsDispatcher.h
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auto& dnsTlsDispatcher = DnsTlsDispatcher::getInstance();
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auto& privateDnsConfiguration = PrivateDnsConfiguration::getInstance();
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privateDnsConfiguration.setObserver(&dnsTlsDispatcher);
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}
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bool DnsResolver::start() {
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if (!verifyCallbacks()) {
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LOG(ERROR) << __func__ << ": Callback verification failed";
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return false;
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}
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if (mDnsProxyListener.startListener()) {
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PLOG(ERROR) << __func__ << ": Unable to start DnsProxyListener";
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return false;
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}
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binder_status_t ret;
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if ((ret = DnsResolverService::start()) != STATUS_OK) {
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LOG(ERROR) << __func__ << ": Unable to start DnsResolverService: " << ret;
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return false;
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}
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return true;
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}
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int DnsResolver::setLogSeverity(int32_t logSeverity) {
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return resolv_set_log_severity(logSeverity);
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}
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} // namespace net
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} // namespace android
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