Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
Steve Anton | 10542f2 | 2019-01-11 17:11:00 | [diff] [blame] | 11 | #include "pc/dtls_transport.h" |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 12 | |
Florent Castelli | 8037fc6 | 2024-08-29 13:00:40 | [diff] [blame] | 13 | #include <optional> |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 14 | #include <utility> |
| 15 | |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 16 | #include "api/dtls_transport_interface.h" |
Niels Möller | 105711e | 2022-06-14 13:48:26 | [diff] [blame] | 17 | #include "api/make_ref_counted.h" |
Artem Titov | d15a575 | 2021-02-10 13:31:24 | [diff] [blame] | 18 | #include "api/sequence_checker.h" |
Harald Alvestrand | 9846262 | 2019-01-30 13:57:03 | [diff] [blame] | 19 | #include "pc/ice_transport.h" |
Harald Alvestrand | 5761e7b | 2021-01-29 14:45:08 | [diff] [blame] | 20 | #include "rtc_base/checks.h" |
| 21 | #include "rtc_base/logging.h" |
Harald Alvestrand | c24a218 | 2022-02-23 13:44:59 | [diff] [blame] | 22 | #include "rtc_base/ssl_stream_adapter.h" |
Harald Alvestrand | 9846262 | 2019-01-30 13:57:03 | [diff] [blame] | 23 | |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 24 | namespace webrtc { |
| 25 | |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 26 | // Implementation of DtlsTransportInterface |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 27 | DtlsTransport::DtlsTransport( |
| 28 | std::unique_ptr<cricket::DtlsTransportInternal> internal) |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 29 | : owner_thread_(rtc::Thread::Current()), |
| 30 | info_(DtlsTransportState::kNew), |
Harald Alvestrand | 2645193 | 2019-02-21 10:27:15 | [diff] [blame] | 31 | internal_dtls_transport_(std::move(internal)), |
Tommi | 87f7090 | 2021-04-27 12:43:08 | [diff] [blame] | 32 | ice_transport_(rtc::make_ref_counted<IceTransportWithPointer>( |
Harald Alvestrand | 2645193 | 2019-02-21 10:27:15 | [diff] [blame] | 33 | internal_dtls_transport_->ice_transport())) { |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 34 | RTC_DCHECK(internal_dtls_transport_.get()); |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 35 | internal_dtls_transport_->SubscribeDtlsTransportState( |
Lahiru Ginnaliya Gamathige | 60c0b44 | 2021-02-16 15:29:08 | [diff] [blame] | 36 | [this](cricket::DtlsTransportInternal* transport, |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 37 | DtlsTransportState state) { |
Lahiru Ginnaliya Gamathige | 60c0b44 | 2021-02-16 15:29:08 | [diff] [blame] | 38 | OnInternalDtlsState(transport, state); |
| 39 | }); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 40 | UpdateInformation(); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | DtlsTransport::~DtlsTransport() { |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 44 | // TODO(tommi): Due to a reference being held by the RtpSenderBase |
| 45 | // implementation, the last reference to the `DtlsTransport` instance can |
| 46 | // be released on the signaling thread. |
| 47 | // RTC_DCHECK_RUN_ON(owner_thread_); |
| 48 | |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 49 | // We depend on the signaling thread to call Clear() before dropping |
| 50 | // its last reference to this object. |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 51 | |
| 52 | // If there are non `owner_thread_` references outstanding, and those |
| 53 | // references are the last ones released, we depend on Clear() having been |
| 54 | // called from the owner_thread before the last reference is deleted. |
| 55 | // `Clear()` is currently called from `JsepTransport::~JsepTransport`. |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 56 | RTC_DCHECK(owner_thread_->IsCurrent() || !internal_dtls_transport_); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | DtlsTransportInformation DtlsTransport::Information() { |
Markus Handell | 6fcd0f8 | 2020-07-07 17:08:53 | [diff] [blame] | 60 | MutexLock lock(&lock_); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 61 | return info_; |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | void DtlsTransport::RegisterObserver(DtlsTransportObserverInterface* observer) { |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 65 | RTC_DCHECK_RUN_ON(owner_thread_); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 66 | RTC_DCHECK(observer); |
| 67 | observer_ = observer; |
| 68 | } |
| 69 | |
| 70 | void DtlsTransport::UnregisterObserver() { |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 71 | RTC_DCHECK_RUN_ON(owner_thread_); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 72 | observer_ = nullptr; |
| 73 | } |
| 74 | |
Harald Alvestrand | 9846262 | 2019-01-30 13:57:03 | [diff] [blame] | 75 | rtc::scoped_refptr<IceTransportInterface> DtlsTransport::ice_transport() { |
| 76 | return ice_transport_; |
| 77 | } |
| 78 | |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 79 | // Internal functions |
| 80 | void DtlsTransport::Clear() { |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 81 | RTC_DCHECK_RUN_ON(owner_thread_); |
Harald Alvestrand | cdc3045 | 2019-01-08 17:08:04 | [diff] [blame] | 82 | RTC_DCHECK(internal()); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 83 | bool must_send_event = |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 84 | (internal()->dtls_state() != DtlsTransportState::kClosed); |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 85 | internal_dtls_transport_.reset(); |
| 86 | ice_transport_->Clear(); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 87 | UpdateInformation(); |
| 88 | if (observer_ && must_send_event) { |
| 89 | observer_->OnStateChange(Information()); |
| 90 | } |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | void DtlsTransport::OnInternalDtlsState( |
| 94 | cricket::DtlsTransportInternal* transport, |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 95 | DtlsTransportState state) { |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 96 | RTC_DCHECK_RUN_ON(owner_thread_); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 97 | RTC_DCHECK(transport == internal()); |
| 98 | RTC_DCHECK(state == internal()->dtls_state()); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 99 | UpdateInformation(); |
Harald Alvestrand | d02541e | 2019-01-03 11:43:28 | [diff] [blame] | 100 | if (observer_) { |
| 101 | observer_->OnStateChange(Information()); |
| 102 | } |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 103 | } |
| 104 | |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 105 | void DtlsTransport::UpdateInformation() { |
| 106 | RTC_DCHECK_RUN_ON(owner_thread_); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 107 | if (internal_dtls_transport_) { |
Harald Alvestrand | 7061e51 | 2019-04-10 15:20:42 | [diff] [blame] | 108 | if (internal_dtls_transport_->dtls_state() == |
Mirko Bonadei | 9f6808b | 2021-05-21 18:46:09 | [diff] [blame] | 109 | DtlsTransportState::kConnected) { |
Harald Alvestrand | c6c3f86 | 2019-10-29 11:19:31 | [diff] [blame] | 110 | bool success = true; |
Harald Alvestrand | 316ab12 | 2022-02-10 08:23:47 | [diff] [blame] | 111 | rtc::SSLRole internal_role; |
Florent Castelli | 8037fc6 | 2024-08-29 13:00:40 | [diff] [blame] | 112 | std::optional<DtlsTransportTlsRole> role; |
Harald Alvestrand | 114871b | 2019-04-11 11:37:41 | [diff] [blame] | 113 | int ssl_cipher_suite; |
Harald Alvestrand | c6c3f86 | 2019-10-29 11:19:31 | [diff] [blame] | 114 | int tls_version; |
| 115 | int srtp_cipher; |
Harald Alvestrand | 316ab12 | 2022-02-10 08:23:47 | [diff] [blame] | 116 | success &= internal_dtls_transport_->GetDtlsRole(&internal_role); |
| 117 | if (success) { |
| 118 | switch (internal_role) { |
| 119 | case rtc::SSL_CLIENT: |
Harald Alvestrand | 321ec3b | 2022-02-10 13:42:18 | [diff] [blame] | 120 | role = DtlsTransportTlsRole::kClient; |
Harald Alvestrand | 316ab12 | 2022-02-10 08:23:47 | [diff] [blame] | 121 | break; |
| 122 | case rtc::SSL_SERVER: |
Harald Alvestrand | 321ec3b | 2022-02-10 13:42:18 | [diff] [blame] | 123 | role = DtlsTransportTlsRole::kServer; |
Harald Alvestrand | 316ab12 | 2022-02-10 08:23:47 | [diff] [blame] | 124 | break; |
| 125 | } |
| 126 | } |
Harald Alvestrand | c6c3f86 | 2019-10-29 11:19:31 | [diff] [blame] | 127 | success &= internal_dtls_transport_->GetSslVersionBytes(&tls_version); |
| 128 | success &= internal_dtls_transport_->GetSslCipherSuite(&ssl_cipher_suite); |
| 129 | success &= internal_dtls_transport_->GetSrtpCryptoSuite(&srtp_cipher); |
| 130 | if (success) { |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 131 | set_info(DtlsTransportInformation( |
Harald Alvestrand | 316ab12 | 2022-02-10 08:23:47 | [diff] [blame] | 132 | internal_dtls_transport_->dtls_state(), role, tls_version, |
Harald Alvestrand | c6c3f86 | 2019-10-29 11:19:31 | [diff] [blame] | 133 | ssl_cipher_suite, srtp_cipher, |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 134 | internal_dtls_transport_->GetRemoteSSLCertChain())); |
Harald Alvestrand | 114871b | 2019-04-11 11:37:41 | [diff] [blame] | 135 | } else { |
Harald Alvestrand | c6c3f86 | 2019-10-29 11:19:31 | [diff] [blame] | 136 | RTC_LOG(LS_ERROR) << "DtlsTransport in connected state has incomplete " |
| 137 | "TLS information"; |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 138 | set_info(DtlsTransportInformation( |
Florent Castelli | 8037fc6 | 2024-08-29 13:00:40 | [diff] [blame] | 139 | internal_dtls_transport_->dtls_state(), role, std::nullopt, |
| 140 | std::nullopt, std::nullopt, |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 141 | internal_dtls_transport_->GetRemoteSSLCertChain())); |
Harald Alvestrand | 114871b | 2019-04-11 11:37:41 | [diff] [blame] | 142 | } |
Harald Alvestrand | 7061e51 | 2019-04-10 15:20:42 | [diff] [blame] | 143 | } else { |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 144 | set_info( |
| 145 | DtlsTransportInformation(internal_dtls_transport_->dtls_state())); |
Harald Alvestrand | 7061e51 | 2019-04-10 15:20:42 | [diff] [blame] | 146 | } |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 147 | } else { |
Tommi | 3ba809d | 2023-12-14 18:49:49 | [diff] [blame] | 148 | set_info(DtlsTransportInformation(DtlsTransportState::kClosed)); |
Harald Alvestrand | 69fb6c8 | 2019-02-13 18:40:11 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | |
Harald Alvestrand | ad88c88 | 2018-11-28 15:47:46 | [diff] [blame] | 152 | } // namespace webrtc |