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