Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019-2023 Savoir-faire Linux Inc. |
| 3 | * Author: Sébastien Blin <sebastien.blin@savoirfairelinux.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | #include "connectionmanager.h" |
| 19 | #include "peer_connection.h" |
Adrien Béraud | 6de3f88 | 2023-07-06 12:56:29 -0400 | [diff] [blame] | 20 | #include "ice_transport_factory.h" |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 21 | #include "upnp/upnp_control.h" |
| 22 | #include "certstore.h" |
| 23 | #include "fileutils.h" |
| 24 | #include "sip_utils.h" |
| 25 | #include "string_utils.h" |
| 26 | |
| 27 | #include <opendht/crypto.h> |
| 28 | #include <opendht/thread_pool.h> |
| 29 | #include <opendht/value.h> |
| 30 | #include <asio.hpp> |
| 31 | |
| 32 | #include <algorithm> |
| 33 | #include <mutex> |
| 34 | #include <map> |
| 35 | #include <condition_variable> |
| 36 | #include <set> |
| 37 | #include <charconv> |
Morteza Namvar | 5f63952 | 2023-07-04 17:08:58 -0400 | [diff] [blame] | 38 | #include <fstream> |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 39 | |
Adrien Béraud | 1ae60aa | 2023-07-07 09:55:09 -0400 | [diff] [blame] | 40 | namespace dhtnet { |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 41 | static constexpr std::chrono::seconds DHT_MSG_TIMEOUT {30}; |
| 42 | static constexpr uint64_t ID_MAX_VAL = 9007199254740992; |
| 43 | |
| 44 | using ValueIdDist = std::uniform_int_distribution<dht::Value::Id>; |
Adrien Béraud | 1ae60aa | 2023-07-07 09:55:09 -0400 | [diff] [blame] | 45 | using CallbackId = std::pair<dhtnet::DeviceId, dht::Value::Id>; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 46 | |
| 47 | struct ConnectionInfo |
| 48 | { |
| 49 | ~ConnectionInfo() |
| 50 | { |
| 51 | if (socket_) |
| 52 | socket_->join(); |
| 53 | } |
| 54 | |
| 55 | std::mutex mutex_ {}; |
| 56 | bool responseReceived_ {false}; |
| 57 | PeerConnectionRequest response_ {}; |
| 58 | std::unique_ptr<IceTransport> ice_ {nullptr}; |
| 59 | // Used to store currently non ready TLS Socket |
| 60 | std::unique_ptr<TlsSocketEndpoint> tls_ {nullptr}; |
| 61 | std::shared_ptr<MultiplexedSocket> socket_ {}; |
| 62 | std::set<CallbackId> cbIds_ {}; |
| 63 | |
| 64 | std::function<void(bool)> onConnected_; |
| 65 | std::unique_ptr<asio::steady_timer> waitForAnswer_ {}; |
| 66 | }; |
| 67 | |
| 68 | /** |
| 69 | * returns whether or not UPnP is enabled and active_ |
| 70 | * ie: if it is able to make port mappings |
| 71 | */ |
| 72 | bool |
| 73 | ConnectionManager::Config::getUPnPActive() const |
| 74 | { |
| 75 | if (upnpCtrl) |
| 76 | return upnpCtrl->isReady(); |
| 77 | return false; |
| 78 | } |
| 79 | |
| 80 | class ConnectionManager::Impl : public std::enable_shared_from_this<ConnectionManager::Impl> |
| 81 | { |
| 82 | public: |
| 83 | explicit Impl(std::shared_ptr<ConnectionManager::Config> config_) |
| 84 | : config_ {std::move(config_)} |
| 85 | {} |
| 86 | ~Impl() {} |
| 87 | |
| 88 | std::shared_ptr<dht::DhtRunner> dht() { return config_->dht; } |
| 89 | const dht::crypto::Identity& identity() const { return config_->id; } |
| 90 | |
| 91 | void removeUnusedConnections(const DeviceId& deviceId = {}) |
| 92 | { |
| 93 | std::vector<std::shared_ptr<ConnectionInfo>> unused {}; |
| 94 | |
| 95 | { |
| 96 | std::lock_guard<std::mutex> lk(infosMtx_); |
| 97 | for (auto it = infos_.begin(); it != infos_.end();) { |
| 98 | auto& [key, info] = *it; |
| 99 | if (info && (!deviceId || key.first == deviceId)) { |
| 100 | unused.emplace_back(std::move(info)); |
| 101 | it = infos_.erase(it); |
| 102 | } else { |
| 103 | ++it; |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | for (auto& info: unused) { |
| 108 | if (info->tls_) |
| 109 | info->tls_->shutdown(); |
| 110 | if (info->socket_) |
| 111 | info->socket_->shutdown(); |
| 112 | if (info->waitForAnswer_) |
| 113 | info->waitForAnswer_->cancel(); |
| 114 | } |
| 115 | if (!unused.empty()) |
| 116 | dht::ThreadPool::io().run([infos = std::move(unused)]() mutable { infos.clear(); }); |
| 117 | } |
| 118 | |
| 119 | void shutdown() |
| 120 | { |
| 121 | if (isDestroying_.exchange(true)) |
| 122 | return; |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 123 | decltype(pendingOperations_) po; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 124 | { |
| 125 | std::lock_guard<std::mutex> lk(connectCbsMtx_); |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 126 | po = std::move(pendingOperations_); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 127 | } |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 128 | for (auto& [deviceId, pcbs] : po) { |
| 129 | for (auto& [id, pending] : pcbs.connecting) |
| 130 | pending.cb(nullptr, deviceId); |
| 131 | for (auto& [id, pending] : pcbs.waiting) |
| 132 | pending.cb(nullptr, deviceId); |
| 133 | } |
| 134 | |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 135 | removeUnusedConnections(); |
| 136 | } |
| 137 | |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 138 | void connectDeviceStartIce(const std::shared_ptr<dht::crypto::PublicKey>& devicePk, |
| 139 | const dht::Value::Id& vid, |
| 140 | const std::string& connType, |
| 141 | std::function<void(bool)> onConnected); |
| 142 | void onResponse(const asio::error_code& ec, const DeviceId& deviceId, const dht::Value::Id& vid); |
| 143 | bool connectDeviceOnNegoDone(const DeviceId& deviceId, |
| 144 | const std::string& name, |
| 145 | const dht::Value::Id& vid, |
| 146 | const std::shared_ptr<dht::crypto::Certificate>& cert); |
| 147 | void connectDevice(const DeviceId& deviceId, |
| 148 | const std::string& uri, |
| 149 | ConnectCallback cb, |
| 150 | bool noNewSocket = false, |
| 151 | bool forceNewSocket = false, |
| 152 | const std::string& connType = ""); |
| 153 | void connectDevice(const std::shared_ptr<dht::crypto::Certificate>& cert, |
| 154 | const std::string& name, |
| 155 | ConnectCallback cb, |
| 156 | bool noNewSocket = false, |
| 157 | bool forceNewSocket = false, |
| 158 | const std::string& connType = ""); |
| 159 | /** |
| 160 | * Send a ChannelRequest on the TLS socket. Triggers cb when ready |
| 161 | * @param sock socket used to send the request |
| 162 | * @param name channel's name |
| 163 | * @param vid channel's id |
| 164 | * @param deviceId to identify the linked ConnectCallback |
| 165 | */ |
| 166 | void sendChannelRequest(std::shared_ptr<MultiplexedSocket>& sock, |
| 167 | const std::string& name, |
| 168 | const DeviceId& deviceId, |
| 169 | const dht::Value::Id& vid); |
| 170 | /** |
| 171 | * Triggered when a PeerConnectionRequest comes from the DHT |
| 172 | */ |
| 173 | void answerTo(IceTransport& ice, |
| 174 | const dht::Value::Id& id, |
| 175 | const std::shared_ptr<dht::crypto::PublicKey>& fromPk); |
| 176 | bool onRequestStartIce(const PeerConnectionRequest& req); |
| 177 | bool onRequestOnNegoDone(const PeerConnectionRequest& req); |
| 178 | void onDhtPeerRequest(const PeerConnectionRequest& req, |
| 179 | const std::shared_ptr<dht::crypto::Certificate>& cert); |
| 180 | |
| 181 | void addNewMultiplexedSocket(const CallbackId& id, const std::shared_ptr<ConnectionInfo>& info); |
| 182 | void onPeerResponse(const PeerConnectionRequest& req); |
| 183 | void onDhtConnected(const dht::crypto::PublicKey& devicePk); |
| 184 | |
| 185 | const std::shared_future<tls::DhParams> dhParams() const; |
| 186 | tls::CertificateStore& certStore() const { return *config_->certStore; } |
| 187 | |
| 188 | mutable std::mutex messageMutex_ {}; |
| 189 | std::set<std::string, std::less<>> treatedMessages_ {}; |
| 190 | |
| 191 | void loadTreatedMessages(); |
| 192 | void saveTreatedMessages() const; |
| 193 | |
| 194 | /// \return true if the given DHT message identifier has been treated |
| 195 | /// \note if message has not been treated yet this method st/ore this id and returns true at |
| 196 | /// further calls |
| 197 | bool isMessageTreated(std::string_view id); |
| 198 | |
| 199 | const std::shared_ptr<dht::log::Logger>& logger() const { return config_->logger; } |
| 200 | |
| 201 | /** |
| 202 | * Published IPv4/IPv6 addresses, used only if defined by the user in account |
| 203 | * configuration |
| 204 | * |
| 205 | */ |
| 206 | IpAddr publishedIp_[2] {}; |
| 207 | |
| 208 | // This will be stored in the configuration |
| 209 | std::string publishedIpAddress_ {}; |
| 210 | |
| 211 | /** |
| 212 | * Published port, used only if defined by the user |
| 213 | */ |
| 214 | pj_uint16_t publishedPort_ {sip_utils::DEFAULT_SIP_PORT}; |
| 215 | |
| 216 | /** |
| 217 | * interface name on which this account is bound |
| 218 | */ |
| 219 | std::string interface_ {"default"}; |
| 220 | |
| 221 | /** |
| 222 | * Get the local interface name on which this account is bound. |
| 223 | */ |
| 224 | const std::string& getLocalInterface() const { return interface_; } |
| 225 | |
| 226 | /** |
| 227 | * Get the published IP address, fallbacks to NAT if family is unspecified |
| 228 | * Prefers the usage of IPv4 if possible. |
| 229 | */ |
| 230 | IpAddr getPublishedIpAddress(uint16_t family = PF_UNSPEC) const; |
| 231 | |
| 232 | /** |
| 233 | * Set published IP address according to given family |
| 234 | */ |
| 235 | void setPublishedAddress(const IpAddr& ip_addr); |
| 236 | |
| 237 | /** |
| 238 | * Store the local/public addresses used to register |
| 239 | */ |
| 240 | void storeActiveIpAddress(std::function<void()>&& cb = {}); |
| 241 | |
| 242 | /** |
| 243 | * Create and return ICE options. |
| 244 | */ |
| 245 | void getIceOptions(std::function<void(IceTransportOptions&&)> cb) noexcept; |
| 246 | IceTransportOptions getIceOptions() const noexcept; |
| 247 | |
| 248 | /** |
| 249 | * Inform that a potential peer device have been found. |
| 250 | * Returns true only if the device certificate is a valid device certificate. |
| 251 | * In that case (true is returned) the account_id parameter is set to the peer account ID. |
| 252 | */ |
| 253 | static bool foundPeerDevice(const std::shared_ptr<dht::crypto::Certificate>& crt, |
| 254 | dht::InfoHash& account_id, const std::shared_ptr<Logger>& logger); |
| 255 | |
| 256 | bool findCertificate(const dht::PkId& id, |
| 257 | std::function<void(const std::shared_ptr<dht::crypto::Certificate>&)>&& cb); |
| 258 | |
| 259 | /** |
| 260 | * returns whether or not UPnP is enabled and active |
| 261 | * ie: if it is able to make port mappings |
| 262 | */ |
| 263 | bool getUPnPActive() const; |
| 264 | |
| 265 | /** |
| 266 | * Triggered when a new TLS socket is ready to use |
| 267 | * @param ok If succeed |
| 268 | * @param deviceId Related device |
| 269 | * @param vid vid of the connection request |
| 270 | * @param name non empty if TLS was created by connectDevice() |
| 271 | */ |
| 272 | void onTlsNegotiationDone(bool ok, |
| 273 | const DeviceId& deviceId, |
| 274 | const dht::Value::Id& vid, |
| 275 | const std::string& name = ""); |
| 276 | |
| 277 | std::shared_ptr<ConnectionManager::Config> config_; |
| 278 | |
| 279 | IceTransportFactory iceFactory_ {}; |
| 280 | |
| 281 | mutable std::mt19937_64 rand; |
| 282 | |
| 283 | iOSConnectedCallback iOSConnectedCb_ {}; |
| 284 | |
| 285 | std::mutex infosMtx_ {}; |
| 286 | // Note: Someone can ask multiple sockets, so to avoid any race condition, |
| 287 | // each device can have multiple multiplexed sockets. |
| 288 | std::map<CallbackId, std::shared_ptr<ConnectionInfo>> infos_ {}; |
| 289 | |
| 290 | std::shared_ptr<ConnectionInfo> getInfo(const DeviceId& deviceId, const dht::Value::Id& id) |
| 291 | { |
| 292 | std::lock_guard<std::mutex> lk(infosMtx_); |
| 293 | auto it = infos_.find({deviceId, id}); |
| 294 | if (it != infos_.end()) |
| 295 | return it->second; |
| 296 | return {}; |
| 297 | } |
| 298 | |
| 299 | std::shared_ptr<ConnectionInfo> getConnectedInfo(const DeviceId& deviceId) |
| 300 | { |
| 301 | std::lock_guard<std::mutex> lk(infosMtx_); |
| 302 | auto it = std::find_if(infos_.begin(), infos_.end(), [&](const auto& item) { |
| 303 | auto& [key, value] = item; |
| 304 | return key.first == deviceId && value && value->socket_; |
| 305 | }); |
| 306 | if (it != infos_.end()) |
| 307 | return it->second; |
| 308 | return {}; |
| 309 | } |
| 310 | |
| 311 | ChannelRequestCallback channelReqCb_ {}; |
| 312 | ConnectionReadyCallback connReadyCb_ {}; |
| 313 | onICERequestCallback iceReqCb_ {}; |
| 314 | |
| 315 | /** |
| 316 | * Stores callback from connectDevice |
| 317 | * @note: each device needs a vector because several connectDevice can |
| 318 | * be done in parallel and we only want one socket |
| 319 | */ |
| 320 | std::mutex connectCbsMtx_ {}; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 321 | |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 322 | struct PendingCb |
| 323 | { |
| 324 | std::string name; |
| 325 | ConnectCallback cb; |
| 326 | }; |
| 327 | struct PendingOperations { |
| 328 | std::map<dht::Value::Id, PendingCb> connecting; |
| 329 | std::map<dht::Value::Id, PendingCb> waiting; |
| 330 | }; |
| 331 | |
| 332 | std::map<DeviceId, PendingOperations> pendingOperations_ {}; |
| 333 | |
Adrien Béraud | 7e8b056 | 2023-06-13 18:10:53 -0400 | [diff] [blame] | 334 | void executePendingOperations(const DeviceId& deviceId, const dht::Value::Id& vid, const std::shared_ptr<ChannelSocket>& sock, bool accepted = true) |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 335 | { |
| 336 | std::vector<PendingCb> ret; |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 337 | std::unique_lock<std::mutex> lk(connectCbsMtx_); |
| 338 | auto it = pendingOperations_.find(deviceId); |
| 339 | if (it == pendingOperations_.end()) |
| 340 | return; |
| 341 | auto& pendingOperations = it->second; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 342 | if (vid == 0) { |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 343 | // Extract all pending callbacks |
| 344 | for (auto& [vid, cb] : pendingOperations.connecting) |
| 345 | ret.emplace_back(std::move(cb)); |
| 346 | pendingOperations.connecting.clear(); |
| 347 | for (auto& [vid, cb] : pendingOperations.waiting) |
| 348 | ret.emplace_back(std::move(cb)); |
| 349 | pendingOperations.waiting.clear(); |
| 350 | } else if (auto n = pendingOperations.waiting.extract(vid)) { |
| 351 | // If it's a waiting operation, just move it |
| 352 | ret.emplace_back(std::move(n.mapped())); |
| 353 | } else if (auto n = pendingOperations.connecting.extract(vid)) { |
| 354 | ret.emplace_back(std::move(n.mapped())); |
| 355 | // If sock is nullptr, execute if it's the last connecting operation |
Adrien Béraud | 7e8b056 | 2023-06-13 18:10:53 -0400 | [diff] [blame] | 356 | // If accepted is false, it means that underlying socket is ok, but channel is declined |
| 357 | if (!sock && pendingOperations.connecting.empty() && accepted) { |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 358 | for (auto& [vid, cb] : pendingOperations.waiting) |
| 359 | ret.emplace_back(std::move(cb)); |
| 360 | pendingOperations.waiting.clear(); |
| 361 | for (auto& [vid, cb] : pendingOperations.connecting) |
| 362 | ret.emplace_back(std::move(cb)); |
| 363 | pendingOperations.connecting.clear(); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 364 | } |
| 365 | } |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 366 | if (pendingOperations.waiting.empty() && pendingOperations.connecting.empty()) |
| 367 | pendingOperations_.erase(it); |
| 368 | lk.unlock(); |
| 369 | for (auto& cb : ret) |
| 370 | cb.cb(sock, deviceId); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 371 | } |
| 372 | |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 373 | std::map<dht::Value::Id, std::string> getPendingIds(const DeviceId& deviceId, const dht::Value::Id vid = 0) |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 374 | { |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 375 | std::map<dht::Value::Id, std::string> ret; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 376 | std::lock_guard<std::mutex> lk(connectCbsMtx_); |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 377 | auto it = pendingOperations_.find(deviceId); |
| 378 | if (it == pendingOperations_.end()) |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 379 | return ret; |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 380 | auto& pendingOp = it->second; |
| 381 | for (const auto& [id, pc]: pendingOp.connecting) { |
| 382 | if (vid == 0 || id == vid) |
| 383 | ret[id] = pc.name; |
| 384 | } |
| 385 | for (const auto& [id, pc]: pendingOp.waiting) { |
| 386 | if (vid == 0 || id == vid) |
| 387 | ret[id] = pc.name; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 388 | } |
| 389 | return ret; |
| 390 | } |
| 391 | |
| 392 | std::shared_ptr<ConnectionManager::Impl> shared() |
| 393 | { |
| 394 | return std::static_pointer_cast<ConnectionManager::Impl>(shared_from_this()); |
| 395 | } |
| 396 | std::shared_ptr<ConnectionManager::Impl const> shared() const |
| 397 | { |
| 398 | return std::static_pointer_cast<ConnectionManager::Impl const>(shared_from_this()); |
| 399 | } |
| 400 | std::weak_ptr<ConnectionManager::Impl> weak() |
| 401 | { |
| 402 | return std::static_pointer_cast<ConnectionManager::Impl>(shared_from_this()); |
| 403 | } |
| 404 | std::weak_ptr<ConnectionManager::Impl const> weak() const |
| 405 | { |
| 406 | return std::static_pointer_cast<ConnectionManager::Impl const>(shared_from_this()); |
| 407 | } |
| 408 | |
| 409 | std::atomic_bool isDestroying_ {false}; |
| 410 | }; |
| 411 | |
| 412 | void |
| 413 | ConnectionManager::Impl::connectDeviceStartIce( |
| 414 | const std::shared_ptr<dht::crypto::PublicKey>& devicePk, |
| 415 | const dht::Value::Id& vid, |
| 416 | const std::string& connType, |
| 417 | std::function<void(bool)> onConnected) |
| 418 | { |
| 419 | auto deviceId = devicePk->getLongId(); |
| 420 | auto info = getInfo(deviceId, vid); |
| 421 | if (!info) { |
| 422 | onConnected(false); |
| 423 | return; |
| 424 | } |
| 425 | |
| 426 | std::unique_lock<std::mutex> lk(info->mutex_); |
| 427 | auto& ice = info->ice_; |
| 428 | |
| 429 | if (!ice) { |
| 430 | if (config_->logger) |
| 431 | config_->logger->error("No ICE detected"); |
| 432 | onConnected(false); |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | auto iceAttributes = ice->getLocalAttributes(); |
| 437 | std::ostringstream icemsg; |
| 438 | icemsg << iceAttributes.ufrag << "\n"; |
| 439 | icemsg << iceAttributes.pwd << "\n"; |
| 440 | for (const auto& addr : ice->getLocalCandidates(1)) { |
| 441 | icemsg << addr << "\n"; |
| 442 | if (config_->logger) |
| 443 | config_->logger->debug("Added local ICE candidate {}", addr); |
| 444 | } |
| 445 | |
| 446 | // Prepare connection request as a DHT message |
| 447 | PeerConnectionRequest val; |
| 448 | |
| 449 | val.id = vid; /* Random id for the message unicity */ |
| 450 | val.ice_msg = icemsg.str(); |
| 451 | val.connType = connType; |
| 452 | |
| 453 | auto value = std::make_shared<dht::Value>(std::move(val)); |
| 454 | value->user_type = "peer_request"; |
| 455 | |
| 456 | // Send connection request through DHT |
| 457 | if (config_->logger) |
| 458 | config_->logger->debug("Request connection to {}", deviceId); |
| 459 | dht()->putEncrypted(dht::InfoHash::get(PeerConnectionRequest::key_prefix |
| 460 | + devicePk->getId().toString()), |
| 461 | devicePk, |
| 462 | value, |
| 463 | [l=config_->logger,deviceId](bool ok) { |
| 464 | if (l) |
| 465 | l->debug("Sent connection request to {:s}. Put encrypted {:s}", |
| 466 | deviceId, |
| 467 | (ok ? "ok" : "failed")); |
| 468 | }); |
| 469 | // Wait for call to onResponse() operated by DHT |
| 470 | if (isDestroying_) { |
| 471 | onConnected(true); // This avoid to wait new negotiation when destroying |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | info->onConnected_ = std::move(onConnected); |
| 476 | info->waitForAnswer_ = std::make_unique<asio::steady_timer>(*config_->ioContext, |
| 477 | std::chrono::steady_clock::now() |
| 478 | + DHT_MSG_TIMEOUT); |
| 479 | info->waitForAnswer_->async_wait( |
| 480 | std::bind(&ConnectionManager::Impl::onResponse, this, std::placeholders::_1, deviceId, vid)); |
| 481 | } |
| 482 | |
| 483 | void |
| 484 | ConnectionManager::Impl::onResponse(const asio::error_code& ec, |
| 485 | const DeviceId& deviceId, |
| 486 | const dht::Value::Id& vid) |
| 487 | { |
| 488 | if (ec == asio::error::operation_aborted) |
| 489 | return; |
| 490 | auto info = getInfo(deviceId, vid); |
| 491 | if (!info) |
| 492 | return; |
| 493 | |
| 494 | std::unique_lock<std::mutex> lk(info->mutex_); |
| 495 | auto& ice = info->ice_; |
| 496 | if (isDestroying_) { |
| 497 | info->onConnected_(true); // The destructor can wake a pending wait here. |
| 498 | return; |
| 499 | } |
| 500 | if (!info->responseReceived_) { |
| 501 | if (config_->logger) |
| 502 | config_->logger->error("no response from DHT to E2E request."); |
| 503 | info->onConnected_(false); |
| 504 | return; |
| 505 | } |
| 506 | |
| 507 | if (!info->ice_) { |
| 508 | info->onConnected_(false); |
| 509 | return; |
| 510 | } |
| 511 | |
| 512 | auto sdp = ice->parseIceCandidates(info->response_.ice_msg); |
| 513 | |
| 514 | if (not ice->startIce({sdp.rem_ufrag, sdp.rem_pwd}, std::move(sdp.rem_candidates))) { |
| 515 | if (config_->logger) |
| 516 | config_->logger->warn("start ICE failed"); |
| 517 | info->onConnected_(false); |
| 518 | return; |
| 519 | } |
| 520 | info->onConnected_(true); |
| 521 | } |
| 522 | |
| 523 | bool |
| 524 | ConnectionManager::Impl::connectDeviceOnNegoDone( |
| 525 | const DeviceId& deviceId, |
| 526 | const std::string& name, |
| 527 | const dht::Value::Id& vid, |
| 528 | const std::shared_ptr<dht::crypto::Certificate>& cert) |
| 529 | { |
| 530 | auto info = getInfo(deviceId, vid); |
| 531 | if (!info) |
| 532 | return false; |
| 533 | |
| 534 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 535 | if (info->waitForAnswer_) { |
| 536 | // Negotiation is done and connected, go to handshake |
| 537 | // and avoid any cancellation at this point. |
| 538 | info->waitForAnswer_->cancel(); |
| 539 | } |
| 540 | auto& ice = info->ice_; |
| 541 | if (!ice || !ice->isRunning()) { |
| 542 | if (config_->logger) |
| 543 | config_->logger->error("No ICE detected or not running"); |
| 544 | return false; |
| 545 | } |
| 546 | |
| 547 | // Build socket |
| 548 | auto endpoint = std::make_unique<IceSocketEndpoint>(std::shared_ptr<IceTransport>( |
| 549 | std::move(ice)), |
| 550 | true); |
| 551 | |
| 552 | // Negotiate a TLS session |
| 553 | if (config_->logger) |
| 554 | config_->logger->debug("Start TLS session - Initied by connectDevice(). Launched by channel: {} - device: {} - vid: {}", name, deviceId, vid); |
| 555 | info->tls_ = std::make_unique<TlsSocketEndpoint>(std::move(endpoint), |
| 556 | certStore(), |
| 557 | identity(), |
| 558 | dhParams(), |
| 559 | *cert); |
| 560 | |
| 561 | info->tls_->setOnReady( |
| 562 | [w = weak(), deviceId = std::move(deviceId), vid = std::move(vid), name = std::move(name)]( |
| 563 | bool ok) { |
| 564 | if (auto shared = w.lock()) |
| 565 | shared->onTlsNegotiationDone(ok, deviceId, vid, name); |
| 566 | }); |
| 567 | return true; |
| 568 | } |
| 569 | |
| 570 | void |
| 571 | ConnectionManager::Impl::connectDevice(const DeviceId& deviceId, |
| 572 | const std::string& name, |
| 573 | ConnectCallback cb, |
| 574 | bool noNewSocket, |
| 575 | bool forceNewSocket, |
| 576 | const std::string& connType) |
| 577 | { |
| 578 | if (!dht()) { |
| 579 | cb(nullptr, deviceId); |
| 580 | return; |
| 581 | } |
| 582 | if (deviceId.toString() == identity().second->getLongId().toString()) { |
| 583 | cb(nullptr, deviceId); |
| 584 | return; |
| 585 | } |
| 586 | findCertificate(deviceId, |
| 587 | [w = weak(), |
| 588 | deviceId, |
| 589 | name, |
| 590 | cb = std::move(cb), |
| 591 | noNewSocket, |
| 592 | forceNewSocket, |
| 593 | connType](const std::shared_ptr<dht::crypto::Certificate>& cert) { |
| 594 | if (!cert) { |
| 595 | if (auto shared = w.lock()) |
| 596 | if (shared->config_->logger) |
| 597 | shared->config_->logger->error( |
| 598 | "No valid certificate found for device {}", |
| 599 | deviceId); |
| 600 | cb(nullptr, deviceId); |
| 601 | return; |
| 602 | } |
| 603 | if (auto shared = w.lock()) { |
| 604 | shared->connectDevice(cert, |
| 605 | name, |
| 606 | std::move(cb), |
| 607 | noNewSocket, |
| 608 | forceNewSocket, |
| 609 | connType); |
| 610 | } else |
| 611 | cb(nullptr, deviceId); |
| 612 | }); |
| 613 | } |
| 614 | |
| 615 | void |
| 616 | ConnectionManager::Impl::connectDevice(const std::shared_ptr<dht::crypto::Certificate>& cert, |
| 617 | const std::string& name, |
| 618 | ConnectCallback cb, |
| 619 | bool noNewSocket, |
| 620 | bool forceNewSocket, |
| 621 | const std::string& connType) |
| 622 | { |
| 623 | // Avoid dht operation in a DHT callback to avoid deadlocks |
| 624 | dht::ThreadPool::computation().run([w = weak(), |
| 625 | name = std::move(name), |
| 626 | cert = std::move(cert), |
| 627 | cb = std::move(cb), |
| 628 | noNewSocket, |
| 629 | forceNewSocket, |
| 630 | connType] { |
| 631 | auto devicePk = cert->getSharedPublicKey(); |
| 632 | auto deviceId = devicePk->getLongId(); |
| 633 | auto sthis = w.lock(); |
| 634 | if (!sthis || sthis->isDestroying_) { |
| 635 | cb(nullptr, deviceId); |
| 636 | return; |
| 637 | } |
| 638 | dht::Value::Id vid = ValueIdDist(1, ID_MAX_VAL)(sthis->rand); |
| 639 | auto isConnectingToDevice = false; |
| 640 | { |
| 641 | std::lock_guard<std::mutex> lk(sthis->connectCbsMtx_); |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 642 | auto pendingsIt = sthis->pendingOperations_.find(deviceId); |
| 643 | if (pendingsIt != sthis->pendingOperations_.end()) { |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 644 | const auto& pendings = pendingsIt->second; |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 645 | while (pendings.connecting.find(vid) != pendings.connecting.end() |
| 646 | && pendings.waiting.find(vid) != pendings.waiting.end()) { |
Adrien Béraud | c5b971d | 2023-06-13 19:41:25 -0400 | [diff] [blame] | 647 | vid = ValueIdDist(1, ID_MAX_VAL)(sthis->rand); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 648 | } |
| 649 | } |
| 650 | // Check if already connecting |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 651 | isConnectingToDevice = pendingsIt != sthis->pendingOperations_.end(); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 652 | // Save current request for sendChannelRequest. |
| 653 | // Note: do not return here, cause we can be in a state where first |
| 654 | // socket is negotiated and first channel is pending |
| 655 | // so return only after we checked the info |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 656 | if (isConnectingToDevice && !forceNewSocket) |
| 657 | pendingsIt->second.waiting[vid] = PendingCb {name, std::move(cb)}; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 658 | else |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 659 | sthis->pendingOperations_[deviceId].connecting[vid] = PendingCb {name, std::move(cb)}; |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | // Check if already negotiated |
| 663 | CallbackId cbId(deviceId, vid); |
| 664 | if (auto info = sthis->getConnectedInfo(deviceId)) { |
| 665 | std::lock_guard<std::mutex> lk(info->mutex_); |
| 666 | if (info->socket_) { |
| 667 | if (sthis->config_->logger) |
| 668 | sthis->config_->logger->debug("Peer already connected to {}. Add a new channel", deviceId); |
| 669 | info->cbIds_.emplace(cbId); |
| 670 | sthis->sendChannelRequest(info->socket_, name, deviceId, vid); |
| 671 | return; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | if (isConnectingToDevice && !forceNewSocket) { |
| 676 | if (sthis->config_->logger) |
| 677 | sthis->config_->logger->debug("Already connecting to {}, wait for the ICE negotiation", deviceId); |
| 678 | return; |
| 679 | } |
| 680 | if (noNewSocket) { |
| 681 | // If no new socket is specified, we don't try to generate a new socket |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 682 | sthis->executePendingOperations(deviceId, vid, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 683 | return; |
| 684 | } |
| 685 | |
| 686 | // Note: used when the ice negotiation fails to erase |
| 687 | // all stored structures. |
| 688 | auto eraseInfo = [w, cbId] { |
| 689 | if (auto shared = w.lock()) { |
| 690 | // If no new socket is specified, we don't try to generate a new socket |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 691 | shared->executePendingOperations(cbId.first, cbId.second, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 692 | std::lock_guard<std::mutex> lk(shared->infosMtx_); |
| 693 | shared->infos_.erase(cbId); |
| 694 | } |
| 695 | }; |
| 696 | |
| 697 | // If no socket exists, we need to initiate an ICE connection. |
| 698 | sthis->getIceOptions([w, |
| 699 | deviceId = std::move(deviceId), |
| 700 | devicePk = std::move(devicePk), |
| 701 | name = std::move(name), |
| 702 | cert = std::move(cert), |
| 703 | vid, |
| 704 | connType, |
| 705 | eraseInfo](auto&& ice_config) { |
| 706 | auto sthis = w.lock(); |
| 707 | if (!sthis) { |
| 708 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 709 | return; |
| 710 | } |
| 711 | ice_config.tcpEnable = true; |
| 712 | ice_config.onInitDone = [w, |
| 713 | deviceId = std::move(deviceId), |
| 714 | devicePk = std::move(devicePk), |
| 715 | name = std::move(name), |
| 716 | cert = std::move(cert), |
| 717 | vid, |
| 718 | connType, |
| 719 | eraseInfo](bool ok) { |
| 720 | dht::ThreadPool::io().run([w = std::move(w), |
| 721 | devicePk = std::move(devicePk), |
| 722 | vid = std::move(vid), |
| 723 | eraseInfo, |
| 724 | connType, ok] { |
| 725 | auto sthis = w.lock(); |
| 726 | if (!ok && sthis && sthis->config_->logger) |
| 727 | sthis->config_->logger->error("Cannot initialize ICE session."); |
| 728 | if (!sthis || !ok) { |
| 729 | eraseInfo(); |
| 730 | return; |
| 731 | } |
| 732 | sthis->connectDeviceStartIce(devicePk, vid, connType, [=](bool ok) { |
| 733 | if (!ok) { |
| 734 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 735 | } |
| 736 | }); |
| 737 | }); |
| 738 | }; |
| 739 | ice_config.onNegoDone = [w, |
| 740 | deviceId, |
| 741 | name, |
| 742 | cert = std::move(cert), |
| 743 | vid, |
| 744 | eraseInfo](bool ok) { |
| 745 | dht::ThreadPool::io().run([w = std::move(w), |
| 746 | deviceId = std::move(deviceId), |
| 747 | name = std::move(name), |
| 748 | cert = std::move(cert), |
| 749 | vid = std::move(vid), |
| 750 | eraseInfo = std::move(eraseInfo), |
| 751 | ok] { |
| 752 | auto sthis = w.lock(); |
| 753 | if (!ok && sthis && sthis->config_->logger) |
| 754 | sthis->config_->logger->error("ICE negotiation failed."); |
| 755 | if (!sthis || !ok || !sthis->connectDeviceOnNegoDone(deviceId, name, vid, cert)) |
| 756 | eraseInfo(); |
| 757 | }); |
| 758 | }; |
| 759 | |
| 760 | auto info = std::make_shared<ConnectionInfo>(); |
| 761 | { |
| 762 | std::lock_guard<std::mutex> lk(sthis->infosMtx_); |
| 763 | sthis->infos_[{deviceId, vid}] = info; |
| 764 | } |
| 765 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 766 | ice_config.master = false; |
| 767 | ice_config.streamsCount = 1; |
| 768 | ice_config.compCountPerStream = 1; |
| 769 | info->ice_ = sthis->iceFactory_.createUTransport(""); |
| 770 | if (!info->ice_) { |
| 771 | if (sthis->config_->logger) |
| 772 | sthis->config_->logger->error("Cannot initialize ICE session."); |
| 773 | eraseInfo(); |
| 774 | return; |
| 775 | } |
| 776 | // We need to detect any shutdown if the ice session is destroyed before going to the |
| 777 | // TLS session; |
| 778 | info->ice_->setOnShutdown([eraseInfo]() { |
| 779 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 780 | }); |
Adrien Béraud | 4cda2d7 | 2023-06-01 15:44:43 -0400 | [diff] [blame] | 781 | try { |
| 782 | info->ice_->initIceInstance(ice_config); |
| 783 | } catch (const std::exception& e) { |
| 784 | if (sthis->config_->logger) |
| 785 | sthis->config_->logger->error("{}", e.what()); |
| 786 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 787 | } |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 788 | }); |
| 789 | }); |
| 790 | } |
| 791 | |
| 792 | void |
| 793 | ConnectionManager::Impl::sendChannelRequest(std::shared_ptr<MultiplexedSocket>& sock, |
| 794 | const std::string& name, |
| 795 | const DeviceId& deviceId, |
| 796 | const dht::Value::Id& vid) |
| 797 | { |
| 798 | auto channelSock = sock->addChannel(name); |
| 799 | channelSock->onShutdown([name, deviceId, vid, w = weak()] { |
| 800 | auto shared = w.lock(); |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 801 | if (auto shared = w.lock()) |
| 802 | shared->executePendingOperations(deviceId, vid, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 803 | }); |
| 804 | channelSock->onReady( |
Adrien Béraud | 7e8b056 | 2023-06-13 18:10:53 -0400 | [diff] [blame] | 805 | [wSock = std::weak_ptr<ChannelSocket>(channelSock), name, deviceId, vid, w = weak()](bool accepted) { |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 806 | auto shared = w.lock(); |
| 807 | auto channelSock = wSock.lock(); |
| 808 | if (shared) |
Adrien Béraud | 7e8b056 | 2023-06-13 18:10:53 -0400 | [diff] [blame] | 809 | shared->executePendingOperations(deviceId, vid, accepted ? channelSock : nullptr, accepted); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 810 | }); |
| 811 | |
| 812 | ChannelRequest val; |
| 813 | val.name = channelSock->name(); |
| 814 | val.state = ChannelRequestState::REQUEST; |
| 815 | val.channel = channelSock->channel(); |
| 816 | msgpack::sbuffer buffer(256); |
| 817 | msgpack::pack(buffer, val); |
| 818 | |
| 819 | std::error_code ec; |
| 820 | int res = sock->write(CONTROL_CHANNEL, |
| 821 | reinterpret_cast<const uint8_t*>(buffer.data()), |
| 822 | buffer.size(), |
| 823 | ec); |
| 824 | if (res < 0) { |
| 825 | // TODO check if we should handle errors here |
| 826 | if (config_->logger) |
| 827 | config_->logger->error("sendChannelRequest failed - error: {}", ec.message()); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | void |
| 832 | ConnectionManager::Impl::onPeerResponse(const PeerConnectionRequest& req) |
| 833 | { |
| 834 | auto device = req.owner->getLongId(); |
| 835 | if (config_->logger) |
| 836 | config_->logger->debug("New response received from {}", device); |
| 837 | if (auto info = getInfo(device, req.id)) { |
| 838 | std::lock_guard<std::mutex> lk {info->mutex_}; |
| 839 | info->responseReceived_ = true; |
| 840 | info->response_ = std::move(req); |
| 841 | info->waitForAnswer_->expires_at(std::chrono::steady_clock::now()); |
| 842 | info->waitForAnswer_->async_wait(std::bind(&ConnectionManager::Impl::onResponse, |
| 843 | this, |
| 844 | std::placeholders::_1, |
| 845 | device, |
| 846 | req.id)); |
| 847 | } else { |
| 848 | if (config_->logger) |
| 849 | config_->logger->warn("Respond received, but cannot find request"); |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | void |
| 854 | ConnectionManager::Impl::onDhtConnected(const dht::crypto::PublicKey& devicePk) |
| 855 | { |
| 856 | if (!dht()) |
| 857 | return; |
| 858 | dht()->listen<PeerConnectionRequest>( |
| 859 | dht::InfoHash::get(PeerConnectionRequest::key_prefix + devicePk.getId().toString()), |
| 860 | [w = weak()](PeerConnectionRequest&& req) { |
| 861 | auto shared = w.lock(); |
| 862 | if (!shared) |
| 863 | return false; |
| 864 | if (shared->isMessageTreated(to_hex_string(req.id))) { |
| 865 | // Message already treated. Just ignore |
| 866 | return true; |
| 867 | } |
| 868 | if (req.isAnswer) { |
| 869 | if (shared->config_->logger) |
| 870 | shared->config_->logger->debug("Received request answer from {}", req.owner->getLongId()); |
| 871 | } else { |
| 872 | if (shared->config_->logger) |
| 873 | shared->config_->logger->debug("Received request from {}", req.owner->getLongId()); |
| 874 | } |
| 875 | if (req.isAnswer) { |
| 876 | shared->onPeerResponse(req); |
| 877 | } else { |
| 878 | // Async certificate checking |
| 879 | shared->dht()->findCertificate( |
| 880 | req.from, |
| 881 | [w, req = std::move(req)]( |
| 882 | const std::shared_ptr<dht::crypto::Certificate>& cert) mutable { |
| 883 | auto shared = w.lock(); |
| 884 | if (!shared) |
| 885 | return; |
| 886 | dht::InfoHash peer_h; |
| 887 | if (foundPeerDevice(cert, peer_h, shared->config_->logger)) { |
| 888 | #if TARGET_OS_IOS |
| 889 | if (shared->iOSConnectedCb_(req.connType, peer_h)) |
| 890 | return; |
| 891 | #endif |
| 892 | shared->onDhtPeerRequest(req, cert); |
| 893 | } else { |
| 894 | if (shared->config_->logger) |
| 895 | shared->config_->logger->warn( |
| 896 | "Received request from untrusted peer {}", |
| 897 | req.owner->getLongId()); |
| 898 | } |
| 899 | }); |
| 900 | } |
| 901 | |
| 902 | return true; |
| 903 | }, |
| 904 | dht::Value::UserTypeFilter("peer_request")); |
| 905 | } |
| 906 | |
| 907 | void |
| 908 | ConnectionManager::Impl::onTlsNegotiationDone(bool ok, |
| 909 | const DeviceId& deviceId, |
| 910 | const dht::Value::Id& vid, |
| 911 | const std::string& name) |
| 912 | { |
| 913 | if (isDestroying_) |
| 914 | return; |
| 915 | // Note: only handle pendingCallbacks here for TLS initied by connectDevice() |
| 916 | // Note: if not initied by connectDevice() the channel name will be empty (because no channel |
| 917 | // asked yet) |
| 918 | auto isDhtRequest = name.empty(); |
| 919 | if (!ok) { |
| 920 | if (isDhtRequest) { |
| 921 | if (config_->logger) |
| 922 | config_->logger->error("TLS connection failure for peer {} - Initied by DHT request. channel: {} - vid: {}", |
| 923 | deviceId, |
| 924 | name, |
| 925 | vid); |
| 926 | if (connReadyCb_) |
| 927 | connReadyCb_(deviceId, "", nullptr); |
| 928 | } else { |
| 929 | if (config_->logger) |
| 930 | config_->logger->error("TLS connection failure for peer {} - Initied by connectDevice. channel: {} - vid: {}", |
| 931 | deviceId, |
| 932 | name, |
| 933 | vid); |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 934 | executePendingOperations(deviceId, vid, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 935 | } |
| 936 | } else { |
| 937 | // The socket is ready, store it |
| 938 | if (isDhtRequest) { |
| 939 | if (config_->logger) |
| 940 | config_->logger->debug("Connection to {} is ready - Initied by DHT request. Vid: {}", |
| 941 | deviceId, |
| 942 | vid); |
| 943 | } else { |
| 944 | if (config_->logger) |
| 945 | config_->logger->debug("Connection to {} is ready - Initied by connectDevice(). channel: {} - vid: {}", |
| 946 | deviceId, |
| 947 | name, |
| 948 | vid); |
| 949 | } |
| 950 | |
| 951 | auto info = getInfo(deviceId, vid); |
| 952 | addNewMultiplexedSocket({deviceId, vid}, info); |
| 953 | // Finally, open the channel and launch pending callbacks |
| 954 | if (info->socket_) { |
| 955 | // Note: do not remove pending there it's done in sendChannelRequest |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 956 | for (const auto& [id, name] : getPendingIds(deviceId)) { |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 957 | if (config_->logger) |
| 958 | config_->logger->debug("Send request on TLS socket for channel {} to {}", |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 959 | name, |
| 960 | deviceId.toString()); |
| 961 | sendChannelRequest(info->socket_, name, deviceId, id); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 962 | } |
| 963 | } |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | void |
| 968 | ConnectionManager::Impl::answerTo(IceTransport& ice, |
| 969 | const dht::Value::Id& id, |
| 970 | const std::shared_ptr<dht::crypto::PublicKey>& from) |
| 971 | { |
| 972 | // NOTE: This is a shortest version of a real SDP message to save some bits |
| 973 | auto iceAttributes = ice.getLocalAttributes(); |
| 974 | std::ostringstream icemsg; |
| 975 | icemsg << iceAttributes.ufrag << "\n"; |
| 976 | icemsg << iceAttributes.pwd << "\n"; |
| 977 | for (const auto& addr : ice.getLocalCandidates(1)) { |
| 978 | icemsg << addr << "\n"; |
| 979 | } |
| 980 | |
| 981 | // Send PeerConnection response |
| 982 | PeerConnectionRequest val; |
| 983 | val.id = id; |
| 984 | val.ice_msg = icemsg.str(); |
| 985 | val.isAnswer = true; |
| 986 | auto value = std::make_shared<dht::Value>(std::move(val)); |
| 987 | value->user_type = "peer_request"; |
| 988 | |
| 989 | if (config_->logger) |
| 990 | config_->logger->debug("Connection accepted, DHT reply to {}", from->getLongId()); |
| 991 | dht()->putEncrypted(dht::InfoHash::get(PeerConnectionRequest::key_prefix |
| 992 | + from->getId().toString()), |
| 993 | from, |
| 994 | value, |
| 995 | [from,l=config_->logger](bool ok) { |
| 996 | if (l) |
| 997 | l->debug("Answer to connection request from {:s}. Put encrypted {:s}", |
| 998 | from->getLongId(), |
| 999 | (ok ? "ok" : "failed")); |
| 1000 | }); |
| 1001 | } |
| 1002 | |
| 1003 | bool |
| 1004 | ConnectionManager::Impl::onRequestStartIce(const PeerConnectionRequest& req) |
| 1005 | { |
| 1006 | auto deviceId = req.owner->getLongId(); |
| 1007 | auto info = getInfo(deviceId, req.id); |
| 1008 | if (!info) |
| 1009 | return false; |
| 1010 | |
| 1011 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 1012 | auto& ice = info->ice_; |
| 1013 | if (!ice) { |
| 1014 | if (config_->logger) |
| 1015 | config_->logger->error("No ICE detected"); |
| 1016 | if (connReadyCb_) |
| 1017 | connReadyCb_(deviceId, "", nullptr); |
| 1018 | return false; |
| 1019 | } |
| 1020 | |
| 1021 | auto sdp = ice->parseIceCandidates(req.ice_msg); |
| 1022 | answerTo(*ice, req.id, req.owner); |
| 1023 | if (not ice->startIce({sdp.rem_ufrag, sdp.rem_pwd}, std::move(sdp.rem_candidates))) { |
| 1024 | if (config_->logger) |
| 1025 | config_->logger->error("Start ICE failed - fallback to TURN"); |
| 1026 | ice = nullptr; |
| 1027 | if (connReadyCb_) |
| 1028 | connReadyCb_(deviceId, "", nullptr); |
| 1029 | return false; |
| 1030 | } |
| 1031 | return true; |
| 1032 | } |
| 1033 | |
| 1034 | bool |
| 1035 | ConnectionManager::Impl::onRequestOnNegoDone(const PeerConnectionRequest& req) |
| 1036 | { |
| 1037 | auto deviceId = req.owner->getLongId(); |
| 1038 | auto info = getInfo(deviceId, req.id); |
| 1039 | if (!info) |
| 1040 | return false; |
| 1041 | |
| 1042 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 1043 | auto& ice = info->ice_; |
| 1044 | if (!ice) { |
| 1045 | if (config_->logger) |
| 1046 | config_->logger->error("No ICE detected"); |
| 1047 | return false; |
| 1048 | } |
| 1049 | |
| 1050 | // Build socket |
| 1051 | auto endpoint = std::make_unique<IceSocketEndpoint>(std::shared_ptr<IceTransport>( |
| 1052 | std::move(ice)), |
| 1053 | false); |
| 1054 | |
| 1055 | // init TLS session |
| 1056 | auto ph = req.from; |
| 1057 | if (config_->logger) |
| 1058 | config_->logger->debug("Start TLS session - Initied by DHT request. Device: {} - vid: {}", |
| 1059 | req.from, |
| 1060 | req.id); |
| 1061 | info->tls_ = std::make_unique<TlsSocketEndpoint>( |
| 1062 | std::move(endpoint), |
| 1063 | certStore(), |
| 1064 | identity(), |
| 1065 | dhParams(), |
| 1066 | [ph, w = weak()](const dht::crypto::Certificate& cert) { |
| 1067 | auto shared = w.lock(); |
| 1068 | if (!shared) |
| 1069 | return false; |
| 1070 | auto crt = shared->certStore().getCertificate(cert.getLongId().toString()); |
| 1071 | if (!crt) |
| 1072 | return false; |
| 1073 | return crt->getPacked() == cert.getPacked(); |
| 1074 | }); |
| 1075 | |
| 1076 | info->tls_->setOnReady( |
| 1077 | [w = weak(), deviceId = std::move(deviceId), vid = std::move(req.id)](bool ok) { |
| 1078 | if (auto shared = w.lock()) |
| 1079 | shared->onTlsNegotiationDone(ok, deviceId, vid); |
| 1080 | }); |
| 1081 | return true; |
| 1082 | } |
| 1083 | |
| 1084 | void |
| 1085 | ConnectionManager::Impl::onDhtPeerRequest(const PeerConnectionRequest& req, |
| 1086 | const std::shared_ptr<dht::crypto::Certificate>& /*cert*/) |
| 1087 | { |
| 1088 | auto deviceId = req.owner->getLongId(); |
| 1089 | if (config_->logger) |
| 1090 | config_->logger->debug("New connection request from {}", deviceId); |
| 1091 | if (!iceReqCb_ || !iceReqCb_(deviceId)) { |
| 1092 | if (config_->logger) |
| 1093 | config_->logger->debug("Refuse connection from {}", deviceId); |
| 1094 | return; |
| 1095 | } |
| 1096 | |
| 1097 | // Because the connection is accepted, create an ICE socket. |
| 1098 | getIceOptions([w = weak(), req, deviceId](auto&& ice_config) { |
| 1099 | auto shared = w.lock(); |
| 1100 | if (!shared) |
| 1101 | return; |
| 1102 | // Note: used when the ice negotiation fails to erase |
| 1103 | // all stored structures. |
| 1104 | auto eraseInfo = [w, id = req.id, deviceId] { |
| 1105 | if (auto shared = w.lock()) { |
| 1106 | // If no new socket is specified, we don't try to generate a new socket |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 1107 | shared->executePendingOperations(deviceId, id, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1108 | if (shared->connReadyCb_) |
| 1109 | shared->connReadyCb_(deviceId, "", nullptr); |
| 1110 | std::lock_guard<std::mutex> lk(shared->infosMtx_); |
| 1111 | shared->infos_.erase({deviceId, id}); |
| 1112 | } |
| 1113 | }; |
| 1114 | |
| 1115 | ice_config.tcpEnable = true; |
| 1116 | ice_config.onInitDone = [w, req, eraseInfo](bool ok) { |
| 1117 | auto shared = w.lock(); |
| 1118 | if (!shared) |
| 1119 | return; |
| 1120 | if (!ok) { |
| 1121 | if (shared->config_->logger) |
| 1122 | shared->config_->logger->error("Cannot initialize ICE session."); |
| 1123 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 1124 | return; |
| 1125 | } |
| 1126 | |
| 1127 | dht::ThreadPool::io().run( |
| 1128 | [w = std::move(w), req = std::move(req), eraseInfo = std::move(eraseInfo)] { |
| 1129 | auto shared = w.lock(); |
| 1130 | if (!shared) |
| 1131 | return; |
| 1132 | if (!shared->onRequestStartIce(req)) |
| 1133 | eraseInfo(); |
| 1134 | }); |
| 1135 | }; |
| 1136 | |
| 1137 | ice_config.onNegoDone = [w, req, eraseInfo](bool ok) { |
| 1138 | auto shared = w.lock(); |
| 1139 | if (!shared) |
| 1140 | return; |
| 1141 | if (!ok) { |
| 1142 | if (shared->config_->logger) |
| 1143 | shared->config_->logger->error("ICE negotiation failed."); |
| 1144 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 1145 | return; |
| 1146 | } |
| 1147 | |
| 1148 | dht::ThreadPool::io().run( |
| 1149 | [w = std::move(w), req = std::move(req), eraseInfo = std::move(eraseInfo)] { |
| 1150 | if (auto shared = w.lock()) |
| 1151 | if (!shared->onRequestOnNegoDone(req)) |
| 1152 | eraseInfo(); |
| 1153 | }); |
| 1154 | }; |
| 1155 | |
| 1156 | // Negotiate a new ICE socket |
| 1157 | auto info = std::make_shared<ConnectionInfo>(); |
| 1158 | { |
| 1159 | std::lock_guard<std::mutex> lk(shared->infosMtx_); |
| 1160 | shared->infos_[{deviceId, req.id}] = info; |
| 1161 | } |
| 1162 | if (shared->config_->logger) |
| 1163 | shared->config_->logger->debug("Accepting connection from {}", deviceId); |
| 1164 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 1165 | ice_config.streamsCount = 1; |
| 1166 | ice_config.compCountPerStream = 1; // TCP |
| 1167 | ice_config.master = true; |
| 1168 | info->ice_ = shared->iceFactory_.createUTransport(""); |
| 1169 | if (not info->ice_) { |
| 1170 | if (shared->config_->logger) |
| 1171 | shared->config_->logger->error("Cannot initialize ICE session"); |
| 1172 | eraseInfo(); |
| 1173 | return; |
| 1174 | } |
| 1175 | // We need to detect any shutdown if the ice session is destroyed before going to the TLS session; |
| 1176 | info->ice_->setOnShutdown([eraseInfo]() { |
| 1177 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 1178 | }); |
Adrien Béraud | 4cda2d7 | 2023-06-01 15:44:43 -0400 | [diff] [blame] | 1179 | try { |
| 1180 | info->ice_->initIceInstance(ice_config); |
| 1181 | } catch (const std::exception& e) { |
| 1182 | if (shared->config_->logger) |
| 1183 | shared->config_->logger->error("{}", e.what()); |
| 1184 | dht::ThreadPool::io().run([eraseInfo = std::move(eraseInfo)] { eraseInfo(); }); |
| 1185 | } |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1186 | }); |
| 1187 | } |
| 1188 | |
| 1189 | void |
| 1190 | ConnectionManager::Impl::addNewMultiplexedSocket(const CallbackId& id, const std::shared_ptr<ConnectionInfo>& info) |
| 1191 | { |
| 1192 | info->socket_ = std::make_shared<MultiplexedSocket>(config_->ioContext, id.first, std::move(info->tls_)); |
| 1193 | info->socket_->setOnReady( |
| 1194 | [w = weak()](const DeviceId& deviceId, const std::shared_ptr<ChannelSocket>& socket) { |
| 1195 | if (auto sthis = w.lock()) |
| 1196 | if (sthis->connReadyCb_) |
| 1197 | sthis->connReadyCb_(deviceId, socket->name(), socket); |
| 1198 | }); |
| 1199 | info->socket_->setOnRequest([w = weak()](const std::shared_ptr<dht::crypto::Certificate>& peer, |
| 1200 | const uint16_t&, |
| 1201 | const std::string& name) { |
| 1202 | if (auto sthis = w.lock()) |
| 1203 | if (sthis->channelReqCb_) |
| 1204 | return sthis->channelReqCb_(peer, name); |
| 1205 | return false; |
| 1206 | }); |
| 1207 | info->socket_->onShutdown([w = weak(), deviceId=id.first, vid=id.second]() { |
| 1208 | // Cancel current outgoing connections |
| 1209 | dht::ThreadPool::io().run([w, deviceId, vid] { |
| 1210 | auto sthis = w.lock(); |
| 1211 | if (!sthis) |
| 1212 | return; |
| 1213 | |
| 1214 | std::set<CallbackId> ids; |
| 1215 | if (auto info = sthis->getInfo(deviceId, vid)) { |
| 1216 | std::lock_guard<std::mutex> lk(info->mutex_); |
| 1217 | if (info->socket_) { |
| 1218 | ids = std::move(info->cbIds_); |
| 1219 | info->socket_->shutdown(); |
| 1220 | } |
| 1221 | } |
| 1222 | for (const auto& cbId : ids) |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 1223 | sthis->executePendingOperations(cbId.first, cbId.second, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1224 | |
| 1225 | std::lock_guard<std::mutex> lk(sthis->infosMtx_); |
| 1226 | sthis->infos_.erase({deviceId, vid}); |
| 1227 | }); |
| 1228 | }); |
| 1229 | } |
| 1230 | |
| 1231 | const std::shared_future<tls::DhParams> |
| 1232 | ConnectionManager::Impl::dhParams() const |
| 1233 | { |
| 1234 | return dht::ThreadPool::computation().get<tls::DhParams>( |
| 1235 | std::bind(tls::DhParams::loadDhParams, config_->cachePath + DIR_SEPARATOR_STR "dhParams")); |
| 1236 | ; |
| 1237 | } |
| 1238 | |
| 1239 | template<typename ID = dht::Value::Id> |
| 1240 | std::set<ID, std::less<>> |
| 1241 | loadIdList(const std::string& path) |
| 1242 | { |
| 1243 | std::set<ID, std::less<>> ids; |
| 1244 | std::ifstream file = fileutils::ifstream(path); |
| 1245 | if (!file.is_open()) { |
| 1246 | //JAMI_DBG("Could not load %s", path.c_str()); |
| 1247 | return ids; |
| 1248 | } |
| 1249 | std::string line; |
| 1250 | while (std::getline(file, line)) { |
| 1251 | if constexpr (std::is_same<ID, std::string>::value) { |
| 1252 | ids.emplace(std::move(line)); |
| 1253 | } else if constexpr (std::is_integral<ID>::value) { |
| 1254 | ID vid; |
| 1255 | if (auto [p, ec] = std::from_chars(line.data(), line.data() + line.size(), vid, 16); |
| 1256 | ec == std::errc()) { |
| 1257 | ids.emplace(vid); |
| 1258 | } |
| 1259 | } |
| 1260 | } |
| 1261 | return ids; |
| 1262 | } |
| 1263 | |
| 1264 | template<typename List = std::set<dht::Value::Id>> |
| 1265 | void |
| 1266 | saveIdList(const std::string& path, const List& ids) |
| 1267 | { |
| 1268 | std::ofstream file = fileutils::ofstream(path, std::ios::trunc | std::ios::binary); |
| 1269 | if (!file.is_open()) { |
| 1270 | //JAMI_ERR("Could not save to %s", path.c_str()); |
| 1271 | return; |
| 1272 | } |
| 1273 | for (auto& c : ids) |
| 1274 | file << std::hex << c << "\n"; |
| 1275 | } |
| 1276 | |
| 1277 | void |
| 1278 | ConnectionManager::Impl::loadTreatedMessages() |
| 1279 | { |
| 1280 | std::lock_guard<std::mutex> lock(messageMutex_); |
| 1281 | auto path = config_->cachePath + DIR_SEPARATOR_STR "treatedMessages"; |
| 1282 | treatedMessages_ = loadIdList<std::string>(path); |
| 1283 | if (treatedMessages_.empty()) { |
| 1284 | auto messages = loadIdList(path); |
| 1285 | for (const auto& m : messages) |
| 1286 | treatedMessages_.emplace(to_hex_string(m)); |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | void |
| 1291 | ConnectionManager::Impl::saveTreatedMessages() const |
| 1292 | { |
| 1293 | dht::ThreadPool::io().run([w = weak()]() { |
| 1294 | if (auto sthis = w.lock()) { |
| 1295 | auto& this_ = *sthis; |
| 1296 | std::lock_guard<std::mutex> lock(this_.messageMutex_); |
| 1297 | fileutils::check_dir(this_.config_->cachePath.c_str()); |
| 1298 | saveIdList<decltype(this_.treatedMessages_)>(this_.config_->cachePath |
| 1299 | + DIR_SEPARATOR_STR "treatedMessages", |
| 1300 | this_.treatedMessages_); |
| 1301 | } |
| 1302 | }); |
| 1303 | } |
| 1304 | |
| 1305 | bool |
| 1306 | ConnectionManager::Impl::isMessageTreated(std::string_view id) |
| 1307 | { |
| 1308 | std::lock_guard<std::mutex> lock(messageMutex_); |
| 1309 | auto res = treatedMessages_.emplace(id); |
| 1310 | if (res.second) { |
| 1311 | saveTreatedMessages(); |
| 1312 | return false; |
| 1313 | } |
| 1314 | return true; |
| 1315 | } |
| 1316 | |
| 1317 | /** |
| 1318 | * returns whether or not UPnP is enabled and active_ |
| 1319 | * ie: if it is able to make port mappings |
| 1320 | */ |
| 1321 | bool |
| 1322 | ConnectionManager::Impl::getUPnPActive() const |
| 1323 | { |
| 1324 | return config_->getUPnPActive(); |
| 1325 | } |
| 1326 | |
| 1327 | IpAddr |
| 1328 | ConnectionManager::Impl::getPublishedIpAddress(uint16_t family) const |
| 1329 | { |
| 1330 | if (family == AF_INET) |
| 1331 | return publishedIp_[0]; |
| 1332 | if (family == AF_INET6) |
| 1333 | return publishedIp_[1]; |
| 1334 | |
| 1335 | assert(family == AF_UNSPEC); |
| 1336 | |
| 1337 | // If family is not set, prefere IPv4 if available. It's more |
| 1338 | // likely to succeed behind NAT. |
| 1339 | if (publishedIp_[0]) |
| 1340 | return publishedIp_[0]; |
| 1341 | if (publishedIp_[1]) |
| 1342 | return publishedIp_[1]; |
| 1343 | return {}; |
| 1344 | } |
| 1345 | |
| 1346 | void |
| 1347 | ConnectionManager::Impl::setPublishedAddress(const IpAddr& ip_addr) |
| 1348 | { |
| 1349 | if (ip_addr.getFamily() == AF_INET) { |
| 1350 | publishedIp_[0] = ip_addr; |
| 1351 | } else { |
| 1352 | publishedIp_[1] = ip_addr; |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | void |
| 1357 | ConnectionManager::Impl::storeActiveIpAddress(std::function<void()>&& cb) |
| 1358 | { |
| 1359 | dht()->getPublicAddress([this, cb = std::move(cb)](std::vector<dht::SockAddr>&& results) { |
| 1360 | bool hasIpv4 {false}, hasIpv6 {false}; |
| 1361 | for (auto& result : results) { |
| 1362 | auto family = result.getFamily(); |
| 1363 | if (family == AF_INET) { |
| 1364 | if (not hasIpv4) { |
| 1365 | hasIpv4 = true; |
| 1366 | if (config_->logger) |
| 1367 | config_->logger->debug("Store DHT public IPv4 address: {}", result); |
| 1368 | //JAMI_DBG("Store DHT public IPv4 address : %s", result.toString().c_str()); |
| 1369 | setPublishedAddress(*result.get()); |
| 1370 | if (config_->upnpCtrl) { |
| 1371 | config_->upnpCtrl->setPublicAddress(*result.get()); |
| 1372 | } |
| 1373 | } |
| 1374 | } else if (family == AF_INET6) { |
| 1375 | if (not hasIpv6) { |
| 1376 | hasIpv6 = true; |
| 1377 | if (config_->logger) |
| 1378 | config_->logger->debug("Store DHT public IPv6 address: {}", result); |
| 1379 | setPublishedAddress(*result.get()); |
| 1380 | } |
| 1381 | } |
| 1382 | if (hasIpv4 and hasIpv6) |
| 1383 | break; |
| 1384 | } |
| 1385 | if (cb) |
| 1386 | cb(); |
| 1387 | }); |
| 1388 | } |
| 1389 | |
| 1390 | void |
| 1391 | ConnectionManager::Impl::getIceOptions(std::function<void(IceTransportOptions&&)> cb) noexcept |
| 1392 | { |
| 1393 | storeActiveIpAddress([this, cb = std::move(cb)] { |
| 1394 | IceTransportOptions opts = ConnectionManager::Impl::getIceOptions(); |
| 1395 | auto publishedAddr = getPublishedIpAddress(); |
| 1396 | |
| 1397 | if (publishedAddr) { |
| 1398 | auto interfaceAddr = ip_utils::getInterfaceAddr(getLocalInterface(), |
| 1399 | publishedAddr.getFamily()); |
| 1400 | if (interfaceAddr) { |
| 1401 | opts.accountLocalAddr = interfaceAddr; |
| 1402 | opts.accountPublicAddr = publishedAddr; |
| 1403 | } |
| 1404 | } |
| 1405 | if (cb) |
| 1406 | cb(std::move(opts)); |
| 1407 | }); |
| 1408 | } |
| 1409 | |
| 1410 | IceTransportOptions |
| 1411 | ConnectionManager::Impl::getIceOptions() const noexcept |
| 1412 | { |
| 1413 | IceTransportOptions opts; |
| 1414 | opts.upnpEnable = getUPnPActive(); |
| 1415 | |
| 1416 | if (config_->stunEnabled) |
| 1417 | opts.stunServers.emplace_back(StunServerInfo().setUri(config_->stunServer)); |
| 1418 | if (config_->turnEnabled) { |
| 1419 | auto cached = false; |
| 1420 | std::lock_guard<std::mutex> lk(config_->cachedTurnMutex); |
| 1421 | cached = config_->cacheTurnV4 || config_->cacheTurnV6; |
| 1422 | if (config_->cacheTurnV4) { |
| 1423 | opts.turnServers.emplace_back(TurnServerInfo() |
| 1424 | .setUri(config_->cacheTurnV4.toString()) |
| 1425 | .setUsername(config_->turnServerUserName) |
| 1426 | .setPassword(config_->turnServerPwd) |
| 1427 | .setRealm(config_->turnServerRealm)); |
| 1428 | } |
| 1429 | // NOTE: first test with ipv6 turn was not concluant and resulted in multiple |
| 1430 | // co issues. So this needs some debug. for now just disable |
| 1431 | // if (cacheTurnV6 && *cacheTurnV6) { |
| 1432 | // opts.turnServers.emplace_back(TurnServerInfo() |
| 1433 | // .setUri(cacheTurnV6->toString(true)) |
| 1434 | // .setUsername(turnServerUserName_) |
| 1435 | // .setPassword(turnServerPwd_) |
| 1436 | // .setRealm(turnServerRealm_)); |
| 1437 | //} |
| 1438 | // Nothing cached, so do the resolution |
| 1439 | if (!cached) { |
| 1440 | opts.turnServers.emplace_back(TurnServerInfo() |
| 1441 | .setUri(config_->turnServer) |
| 1442 | .setUsername(config_->turnServerUserName) |
| 1443 | .setPassword(config_->turnServerPwd) |
| 1444 | .setRealm(config_->turnServerRealm)); |
| 1445 | } |
| 1446 | } |
| 1447 | return opts; |
| 1448 | } |
| 1449 | |
| 1450 | bool |
| 1451 | ConnectionManager::Impl::foundPeerDevice(const std::shared_ptr<dht::crypto::Certificate>& crt, |
| 1452 | dht::InfoHash& account_id, |
| 1453 | const std::shared_ptr<Logger>& logger) |
| 1454 | { |
| 1455 | if (not crt) |
| 1456 | return false; |
| 1457 | |
| 1458 | auto top_issuer = crt; |
| 1459 | while (top_issuer->issuer) |
| 1460 | top_issuer = top_issuer->issuer; |
| 1461 | |
| 1462 | // Device certificate can't be self-signed |
| 1463 | if (top_issuer == crt) { |
| 1464 | if (logger) |
| 1465 | logger->warn("Found invalid peer device: {}", crt->getLongId()); |
| 1466 | return false; |
| 1467 | } |
| 1468 | |
| 1469 | // Check peer certificate chain |
| 1470 | // Trust store with top issuer as the only CA |
| 1471 | dht::crypto::TrustList peer_trust; |
| 1472 | peer_trust.add(*top_issuer); |
| 1473 | if (not peer_trust.verify(*crt)) { |
| 1474 | if (logger) |
| 1475 | logger->warn("Found invalid peer device: {}", crt->getLongId()); |
| 1476 | return false; |
| 1477 | } |
| 1478 | |
| 1479 | // Check cached OCSP response |
| 1480 | if (crt->ocspResponse and crt->ocspResponse->getCertificateStatus() != GNUTLS_OCSP_CERT_GOOD) { |
| 1481 | if (logger) |
| 1482 | logger->error("Certificate %s is disabled by cached OCSP response", crt->getLongId()); |
| 1483 | return false; |
| 1484 | } |
| 1485 | |
| 1486 | account_id = crt->issuer->getId(); |
| 1487 | if (logger) |
| 1488 | logger->warn("Found peer device: {} account:{} CA:{}", |
| 1489 | crt->getLongId(), |
| 1490 | account_id, |
| 1491 | top_issuer->getId()); |
| 1492 | return true; |
| 1493 | } |
| 1494 | |
| 1495 | bool |
| 1496 | ConnectionManager::Impl::findCertificate( |
| 1497 | const dht::PkId& id, std::function<void(const std::shared_ptr<dht::crypto::Certificate>&)>&& cb) |
| 1498 | { |
| 1499 | if (auto cert = certStore().getCertificate(id.toString())) { |
| 1500 | if (cb) |
| 1501 | cb(cert); |
| 1502 | } else if (cb) |
| 1503 | cb(nullptr); |
| 1504 | return true; |
| 1505 | } |
| 1506 | |
| 1507 | ConnectionManager::ConnectionManager(std::shared_ptr<ConnectionManager::Config> config_) |
| 1508 | : pimpl_ {std::make_shared<Impl>(config_)} |
| 1509 | {} |
| 1510 | |
| 1511 | ConnectionManager::~ConnectionManager() |
| 1512 | { |
| 1513 | if (pimpl_) |
| 1514 | pimpl_->shutdown(); |
| 1515 | } |
| 1516 | |
| 1517 | void |
| 1518 | ConnectionManager::connectDevice(const DeviceId& deviceId, |
| 1519 | const std::string& name, |
| 1520 | ConnectCallback cb, |
| 1521 | bool noNewSocket, |
| 1522 | bool forceNewSocket, |
| 1523 | const std::string& connType) |
| 1524 | { |
| 1525 | pimpl_->connectDevice(deviceId, name, std::move(cb), noNewSocket, forceNewSocket, connType); |
| 1526 | } |
| 1527 | |
| 1528 | void |
| 1529 | ConnectionManager::connectDevice(const std::shared_ptr<dht::crypto::Certificate>& cert, |
| 1530 | const std::string& name, |
| 1531 | ConnectCallback cb, |
| 1532 | bool noNewSocket, |
| 1533 | bool forceNewSocket, |
| 1534 | const std::string& connType) |
| 1535 | { |
| 1536 | pimpl_->connectDevice(cert, name, std::move(cb), noNewSocket, forceNewSocket, connType); |
| 1537 | } |
| 1538 | |
| 1539 | bool |
| 1540 | ConnectionManager::isConnecting(const DeviceId& deviceId, const std::string& name) const |
| 1541 | { |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 1542 | auto pending = pimpl_->getPendingIds(deviceId); |
| 1543 | return std::find_if(pending.begin(), pending.end(), [&](auto p) { return p.second == name; }) |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1544 | != pending.end(); |
| 1545 | } |
| 1546 | |
| 1547 | void |
| 1548 | ConnectionManager::closeConnectionsWith(const std::string& peerUri) |
| 1549 | { |
| 1550 | std::vector<std::shared_ptr<ConnectionInfo>> connInfos; |
| 1551 | std::set<DeviceId> peersDevices; |
| 1552 | { |
| 1553 | std::lock_guard<std::mutex> lk(pimpl_->infosMtx_); |
| 1554 | for (auto iter = pimpl_->infos_.begin(); iter != pimpl_->infos_.end();) { |
| 1555 | auto const& [key, value] = *iter; |
| 1556 | auto deviceId = key.first; |
| 1557 | auto cert = pimpl_->certStore().getCertificate(deviceId.toString()); |
| 1558 | if (cert && cert->issuer && peerUri == cert->issuer->getId().toString()) { |
| 1559 | connInfos.emplace_back(value); |
| 1560 | peersDevices.emplace(deviceId); |
| 1561 | iter = pimpl_->infos_.erase(iter); |
| 1562 | } else { |
| 1563 | iter++; |
| 1564 | } |
| 1565 | } |
| 1566 | } |
| 1567 | // Stop connections to all peers devices |
| 1568 | for (const auto& deviceId : peersDevices) { |
Adrien Béraud | 665294f | 2023-06-13 18:09:11 -0400 | [diff] [blame] | 1569 | pimpl_->executePendingOperations(deviceId, 0, nullptr); |
Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1570 | // This will close the TLS Session |
| 1571 | pimpl_->removeUnusedConnections(deviceId); |
| 1572 | } |
| 1573 | for (auto& info : connInfos) { |
| 1574 | if (info->socket_) |
| 1575 | info->socket_->shutdown(); |
| 1576 | if (info->waitForAnswer_) |
| 1577 | info->waitForAnswer_->cancel(); |
| 1578 | if (info->ice_) { |
| 1579 | std::unique_lock<std::mutex> lk {info->mutex_}; |
| 1580 | dht::ThreadPool::io().run( |
| 1581 | [ice = std::shared_ptr<IceTransport>(std::move(info->ice_))] {}); |
| 1582 | } |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | void |
| 1587 | ConnectionManager::onDhtConnected(const dht::crypto::PublicKey& devicePk) |
| 1588 | { |
| 1589 | pimpl_->onDhtConnected(devicePk); |
| 1590 | } |
| 1591 | |
| 1592 | void |
| 1593 | ConnectionManager::onICERequest(onICERequestCallback&& cb) |
| 1594 | { |
| 1595 | pimpl_->iceReqCb_ = std::move(cb); |
| 1596 | } |
| 1597 | |
| 1598 | void |
| 1599 | ConnectionManager::onChannelRequest(ChannelRequestCallback&& cb) |
| 1600 | { |
| 1601 | pimpl_->channelReqCb_ = std::move(cb); |
| 1602 | } |
| 1603 | |
| 1604 | void |
| 1605 | ConnectionManager::onConnectionReady(ConnectionReadyCallback&& cb) |
| 1606 | { |
| 1607 | pimpl_->connReadyCb_ = std::move(cb); |
| 1608 | } |
| 1609 | |
| 1610 | void |
| 1611 | ConnectionManager::oniOSConnected(iOSConnectedCallback&& cb) |
| 1612 | { |
| 1613 | pimpl_->iOSConnectedCb_ = std::move(cb); |
| 1614 | } |
| 1615 | |
| 1616 | std::size_t |
| 1617 | ConnectionManager::activeSockets() const |
| 1618 | { |
| 1619 | std::lock_guard<std::mutex> lk(pimpl_->infosMtx_); |
| 1620 | return pimpl_->infos_.size(); |
| 1621 | } |
| 1622 | |
| 1623 | void |
| 1624 | ConnectionManager::monitor() const |
| 1625 | { |
| 1626 | std::lock_guard<std::mutex> lk(pimpl_->infosMtx_); |
| 1627 | auto logger = pimpl_->config_->logger; |
| 1628 | if (!logger) |
| 1629 | return; |
| 1630 | logger->debug("ConnectionManager current status:"); |
| 1631 | for (const auto& [_, ci] : pimpl_->infos_) { |
| 1632 | if (ci->socket_) |
| 1633 | ci->socket_->monitor(); |
| 1634 | } |
| 1635 | logger->debug("ConnectionManager end status."); |
| 1636 | } |
| 1637 | |
| 1638 | void |
| 1639 | ConnectionManager::connectivityChanged() |
| 1640 | { |
| 1641 | std::lock_guard<std::mutex> lk(pimpl_->infosMtx_); |
| 1642 | for (const auto& [_, ci] : pimpl_->infos_) { |
| 1643 | if (ci->socket_) |
| 1644 | ci->socket_->sendBeacon(); |
| 1645 | } |
| 1646 | } |
| 1647 | |
| 1648 | void |
| 1649 | ConnectionManager::getIceOptions(std::function<void(IceTransportOptions&&)> cb) noexcept |
| 1650 | { |
| 1651 | return pimpl_->getIceOptions(std::move(cb)); |
| 1652 | } |
| 1653 | |
| 1654 | IceTransportOptions |
| 1655 | ConnectionManager::getIceOptions() const noexcept |
| 1656 | { |
| 1657 | return pimpl_->getIceOptions(); |
| 1658 | } |
| 1659 | |
| 1660 | IpAddr |
| 1661 | ConnectionManager::getPublishedIpAddress(uint16_t family) const |
| 1662 | { |
| 1663 | return pimpl_->getPublishedIpAddress(family); |
| 1664 | } |
| 1665 | |
| 1666 | void |
| 1667 | ConnectionManager::setPublishedAddress(const IpAddr& ip_addr) |
| 1668 | { |
| 1669 | return pimpl_->setPublishedAddress(ip_addr); |
| 1670 | } |
| 1671 | |
| 1672 | void |
| 1673 | ConnectionManager::storeActiveIpAddress(std::function<void()>&& cb) |
| 1674 | { |
| 1675 | return pimpl_->storeActiveIpAddress(std::move(cb)); |
| 1676 | } |
| 1677 | |
| 1678 | std::shared_ptr<ConnectionManager::Config> |
| 1679 | ConnectionManager::getConfig() |
| 1680 | { |
| 1681 | return pimpl_->config_; |
| 1682 | } |
| 1683 | |
| 1684 | } // namespace jami |