Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 1 | /** |
| 2 | * Copyright (c) 2019, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Mike Yu | 7eb1e33 | 2021-10-21 11:13:30 +0800 | [diff] [blame] | 17 | #define LOG_TAG "resolv" |
| 18 | |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 19 | #include "DnsResolver.h" |
| 20 | |
| 21 | #include <android-base/logging.h> |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 22 | |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 23 | #include "DnsProxyListener.h" |
| 24 | #include "DnsResolverService.h" |
Mike Yu | 5448c9e | 2020-12-14 16:45:16 +0800 | [diff] [blame] | 25 | #include "DnsTlsDispatcher.h" |
| 26 | #include "PrivateDnsConfiguration.h" |
Bernie Innocenti | e71a28a | 2019-05-29 00:42:35 +0900 | [diff] [blame] | 27 | #include "netd_resolv/resolv.h" |
| 28 | #include "res_debug.h" |
Luke Huang | 5729afc | 2020-07-30 23:12:17 +0800 | [diff] [blame] | 29 | #include "util.h" |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 30 | |
Bernie Innocenti | c19a464 | 2019-05-16 18:38:47 +0900 | [diff] [blame] | 31 | bool resolv_init(const ResolverNetdCallbacks* callbacks) { |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 32 | android::base::InitLogging(/*argv=*/nullptr); |
Bernie Innocenti | fb8641c | 2019-03-29 17:02:53 +0900 | [diff] [blame] | 33 | LOG(INFO) << __func__ << ": Initializing resolver"; |
Ken Chen | 70e9ff9 | 2022-03-22 00:53:46 +0800 | [diff] [blame] | 34 | resolv_set_log_severity(android::base::WARNING); |
| 35 | doh_init_logger(DOH_LOG_LEVEL_WARN); |
Sehee Park | d975bf3 | 2019-08-07 13:21:16 +0900 | [diff] [blame] | 36 | using android::net::gApiLevel; |
Luke Huang | 5729afc | 2020-07-30 23:12:17 +0800 | [diff] [blame] | 37 | gApiLevel = getApiLevel(); |
Sehee Park | d975bf3 | 2019-08-07 13:21:16 +0900 | [diff] [blame] | 38 | using android::net::gResNetdCallbacks; |
| 39 | gResNetdCallbacks.check_calling_permission = callbacks->check_calling_permission; |
| 40 | gResNetdCallbacks.get_network_context = callbacks->get_network_context; |
| 41 | gResNetdCallbacks.log = callbacks->log; |
| 42 | if (gApiLevel >= 30) { |
| 43 | gResNetdCallbacks.tagSocket = callbacks->tagSocket; |
Felipe Mosso Ferfoglia | 23b540f | 2019-08-07 15:47:53 -0300 | [diff] [blame] | 44 | gResNetdCallbacks.evaluate_domain_name = callbacks->evaluate_domain_name; |
Sehee Park | d975bf3 | 2019-08-07 13:21:16 +0900 | [diff] [blame] | 45 | } |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 46 | android::net::gDnsResolv = android::net::DnsResolver::getInstance(); |
| 47 | return android::net::gDnsResolv->start(); |
| 48 | } |
| 49 | |
| 50 | namespace android { |
| 51 | namespace net { |
| 52 | |
| 53 | namespace { |
| 54 | |
| 55 | bool verifyCallbacks() { |
Sehee Park | d975bf3 | 2019-08-07 13:21:16 +0900 | [diff] [blame] | 56 | if (!(gResNetdCallbacks.check_calling_permission && gResNetdCallbacks.get_network_context && |
| 57 | gResNetdCallbacks.log)) { |
| 58 | return false; |
| 59 | } |
| 60 | if (gApiLevel >= 30) { |
| 61 | return gResNetdCallbacks.tagSocket != nullptr; |
| 62 | } |
| 63 | return true; |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | } // namespace |
| 67 | |
| 68 | DnsResolver* gDnsResolv = nullptr; |
| 69 | ResolverNetdCallbacks gResNetdCallbacks; |
Luke Huang | c6bbbe7 | 2019-03-28 21:38:28 +0800 | [diff] [blame] | 70 | netdutils::Log gDnsResolverLog("dnsResolver"); |
Sehee Park | d975bf3 | 2019-08-07 13:21:16 +0900 | [diff] [blame] | 71 | uint64_t gApiLevel = 0; |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 72 | |
| 73 | DnsResolver* DnsResolver::getInstance() { |
| 74 | // Instantiated on first use. |
| 75 | static DnsResolver instance; |
| 76 | return &instance; |
| 77 | } |
| 78 | |
Mike Yu | 5448c9e | 2020-12-14 16:45:16 +0800 | [diff] [blame] | 79 | DnsResolver::DnsResolver() { |
| 80 | // TODO: make them member variables after fixing the circular dependency: |
| 81 | // DnsTlsDispatcher.h -> resolv_private.h -> DnsResolver.h -> DnsTlsDispatcher.h |
| 82 | auto& dnsTlsDispatcher = DnsTlsDispatcher::getInstance(); |
| 83 | auto& privateDnsConfiguration = PrivateDnsConfiguration::getInstance(); |
| 84 | privateDnsConfiguration.setObserver(&dnsTlsDispatcher); |
Luke Huang | 2fe9c73 | 2021-07-06 01:48:02 +0800 | [diff] [blame] | 85 | if (isDoHEnabled()) privateDnsConfiguration.initDoh(); |
Mike Yu | 5448c9e | 2020-12-14 16:45:16 +0800 | [diff] [blame] | 86 | } |
| 87 | |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 88 | bool DnsResolver::start() { |
| 89 | if (!verifyCallbacks()) { |
Bernie Innocenti | fb8641c | 2019-03-29 17:02:53 +0900 | [diff] [blame] | 90 | LOG(ERROR) << __func__ << ": Callback verification failed"; |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 91 | return false; |
| 92 | } |
| 93 | if (mDnsProxyListener.startListener()) { |
Bernie Innocenti | fb8641c | 2019-03-29 17:02:53 +0900 | [diff] [blame] | 94 | PLOG(ERROR) << __func__ << ": Unable to start DnsProxyListener"; |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 95 | return false; |
| 96 | } |
| 97 | binder_status_t ret; |
| 98 | if ((ret = DnsResolverService::start()) != STATUS_OK) { |
Bernie Innocenti | fb8641c | 2019-03-29 17:02:53 +0900 | [diff] [blame] | 99 | LOG(ERROR) << __func__ << ": Unable to start DnsResolverService: " << ret; |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 100 | return false; |
| 101 | } |
| 102 | return true; |
| 103 | } |
| 104 | |
Ken Chen | d99022c | 2019-02-20 21:34:14 +0800 | [diff] [blame] | 105 | int DnsResolver::setLogSeverity(int32_t logSeverity) { |
| 106 | return resolv_set_log_severity(logSeverity); |
| 107 | } |
| 108 | |
Luke Huang | 36796f3 | 2019-03-13 02:54:45 +0800 | [diff] [blame] | 109 | } // namespace net |
| 110 | } // namespace android |