311 lines
12 KiB
C++
311 lines
12 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/net/NetQueryDispatcher.h"
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#include "td/telegram/net/DcAuthManager.h"
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#include "td/telegram/net/NetQuery.h"
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#include "td/telegram/net/NetQueryDelayer.h"
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#include "td/telegram/net/PublicRsaKeyWatchdog.h"
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#include "td/telegram/net/SessionMultiProxy.h"
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#include "td/telegram/ConfigShared.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/Td.h"
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#include "td/db/Pmc.h"
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#include "td/utils/common.h"
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/port/thread.h"
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#include "td/utils/Slice.h"
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namespace td {
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void NetQueryDispatcher::complete_net_query(NetQueryPtr net_query) {
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auto callback = net_query->move_callback();
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if (callback.empty()) {
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net_query->debug("sent to td (no callback)");
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send_closure(G()->td(), &NetQueryCallback::on_result, std::move(net_query));
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} else {
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net_query->debug("sent to callback", true);
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send_closure(std::move(callback), &NetQueryCallback::on_result, std::move(net_query));
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}
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}
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void NetQueryDispatcher::dispatch(NetQueryPtr net_query) {
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net_query->debug("dispatch");
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if (stop_flag_.load(std::memory_order_relaxed)) {
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net_query->set_error(Status::Error(500, "Internal Server Error: closing"));
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return complete_net_query(std::move(net_query));
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}
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if (net_query->is_ready()) {
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if (net_query->is_error()) {
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auto code = net_query->error().code();
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if (code == 303) {
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try_fix_migrate(net_query);
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} else if (code == NetQuery::Resend) {
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net_query->resend();
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} else if (code < 0 || code == 500 || code == 420) {
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net_query->debug("sent to NetQueryDelayer");
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return send_closure(delayer_, &NetQueryDelayer::delay, std::move(net_query));
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}
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}
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}
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if (!net_query->is_ready()) {
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if (net_query->dispatch_ttl == 0) {
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net_query->set_error(Status::Error("DispatchTtlError"));
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}
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}
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auto dest_dc_id = net_query->dc_id();
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if (dest_dc_id.is_main()) {
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dest_dc_id = DcId::internal(main_dc_id_.load(std::memory_order_relaxed));
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}
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if (!net_query->is_ready() && wait_dc_init(dest_dc_id, true).is_error()) {
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net_query->set_error(Status::Error(PSLICE() << "No such dc " << dest_dc_id));
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}
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if (net_query->is_ready()) {
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return complete_net_query(std::move(net_query));
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}
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if (net_query->dispatch_ttl > 0) {
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net_query->dispatch_ttl--;
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}
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size_t dc_pos = static_cast<size_t>(dest_dc_id.get_raw_id() - 1);
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CHECK(dc_pos < dcs_.size());
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switch (net_query->type()) {
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case NetQuery::Type::Common:
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net_query->debug(PSTRING() << "sent to main session multi proxy " << dest_dc_id);
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send_closure_later(dcs_[dc_pos].main_session_, &SessionMultiProxy::send, std::move(net_query));
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break;
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case NetQuery::Type::Upload:
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net_query->debug(PSTRING() << "sent to upload session multi proxy " << dest_dc_id);
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send_closure_later(dcs_[dc_pos].upload_session_, &SessionMultiProxy::send, std::move(net_query));
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break;
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case NetQuery::Type::Download:
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net_query->debug(PSTRING() << "sent to download session multi proxy " << dest_dc_id);
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send_closure_later(dcs_[dc_pos].download_session_, &SessionMultiProxy::send, std::move(net_query));
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break;
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case NetQuery::Type::DownloadSmall:
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net_query->debug(PSTRING() << "sent to download small session multi proxy " << dest_dc_id);
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send_closure_later(dcs_[dc_pos].download_small_session_, &SessionMultiProxy::send, std::move(net_query));
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break;
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}
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}
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Status NetQueryDispatcher::wait_dc_init(DcId dc_id, bool force) {
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// TODO: optimize
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if (!dc_id.is_exact()) {
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return Status::Error("Not exact DC");
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}
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size_t pos = static_cast<size_t>(dc_id.get_raw_id() - 1);
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if (pos >= dcs_.size()) {
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return Status::Error("Too big DC id");
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}
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auto &dc = dcs_[pos];
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bool should_init = false;
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if (!dc.is_valid_) {
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if (!force) {
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return Status::Error("Invalid DC");
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}
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bool expected = false;
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should_init =
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dc.is_valid_.compare_exchange_strong(expected, true, std::memory_order_seq_cst, std::memory_order_seq_cst);
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}
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if (should_init) {
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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if (stop_flag_.load(std::memory_order_relaxed)) {
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return Status::Error("Closing");
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}
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// init dc
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decltype(common_public_rsa_key_) public_rsa_key;
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bool is_cdn = false;
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if (dc_id.is_internal()) {
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public_rsa_key = common_public_rsa_key_;
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} else {
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public_rsa_key = std::make_shared<PublicRsaKeyShared>(dc_id);
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send_closure_later(public_rsa_key_watchdog_, &PublicRsaKeyWatchdog::add_public_rsa_key, public_rsa_key);
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is_cdn = true;
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}
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auto auth_data = AuthDataShared::create(dc_id, std::move(public_rsa_key), td_guard_);
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int32 session_count = get_session_count();
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bool use_pfs = get_use_pfs();
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int32 slow_net_scheduler_id = G()->get_slow_net_scheduler_id();
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auto raw_dc_id = dc_id.get_raw_id();
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int32 upload_session_count = raw_dc_id != 2 && raw_dc_id != 4 ? 8 : 4;
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int32 download_session_count = 2;
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int32 download_small_session_count = 2;
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dc.main_session_ =
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create_actor<SessionMultiProxy>(PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":main", session_count,
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auth_data, raw_dc_id == main_dc_id_, use_pfs, false, false, is_cdn);
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dc.upload_session_ = create_actor_on_scheduler<SessionMultiProxy>(
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PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":upload", slow_net_scheduler_id, upload_session_count,
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auth_data, false, use_pfs, false, true, is_cdn);
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dc.download_session_ = create_actor_on_scheduler<SessionMultiProxy>(
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PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":download", slow_net_scheduler_id, download_session_count,
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auth_data, false, use_pfs, true, true, is_cdn);
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dc.download_small_session_ = create_actor_on_scheduler<SessionMultiProxy>(
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PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":download_small", slow_net_scheduler_id,
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download_small_session_count, auth_data, false, use_pfs, true, true, is_cdn);
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dc.is_inited_ = true;
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if (dc_id.is_internal()) {
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send_closure_later(dc_auth_manager_, &DcAuthManager::add_dc, std::move(auth_data));
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}
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} else {
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while (!dc.is_inited_) {
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if (stop_flag_.load(std::memory_order_relaxed)) {
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return Status::Error("Closing");
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}
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#if !TD_THREAD_UNSUPPORTED
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td::this_thread::yield();
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#endif
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}
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}
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return Status::OK();
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}
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void NetQueryDispatcher::dispatch_with_callback(NetQueryPtr net_query, ActorShared<NetQueryCallback> callback) {
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net_query->set_callback(std::move(callback));
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dispatch(std::move(net_query));
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}
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void NetQueryDispatcher::stop() {
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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td_guard_.reset();
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stop_flag_ = true;
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delayer_.hangup();
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for (const auto &dc : dcs_) {
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dc.main_session_.hangup();
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dc.upload_session_.hangup();
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dc.download_session_.hangup();
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dc.download_small_session_.hangup();
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}
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public_rsa_key_watchdog_.reset();
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dc_auth_manager_.reset();
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}
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void NetQueryDispatcher::update_session_count() {
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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int32 session_count = get_session_count();
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bool use_pfs = get_use_pfs();
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for (size_t i = 1; i < MAX_DC_COUNT; i++) {
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if (is_dc_inited(narrow_cast<int32>(i))) {
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send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_options, session_count, use_pfs);
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send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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}
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}
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}
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void NetQueryDispatcher::update_use_pfs() {
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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bool use_pfs = get_use_pfs();
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for (size_t i = 1; i < MAX_DC_COUNT; i++) {
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if (is_dc_inited(narrow_cast<int32>(i))) {
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send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_use_pfs, use_pfs);
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}
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}
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}
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void NetQueryDispatcher::update_mtproto_header() {
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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for (size_t i = 1; i < MAX_DC_COUNT; i++) {
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if (is_dc_inited(narrow_cast<int32>(i))) {
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send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_mtproto_header);
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send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_mtproto_header);
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send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_mtproto_header);
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send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_mtproto_header);
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}
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}
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}
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void NetQueryDispatcher::update_valid_dc(DcId dc_id) {
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wait_dc_init(dc_id, true);
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}
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bool NetQueryDispatcher::is_dc_inited(int32 raw_dc_id) {
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return dcs_[raw_dc_id - 1].is_valid_.load(std::memory_order_relaxed);
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}
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int32 NetQueryDispatcher::get_session_count() {
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return max(G()->shared_config().get_option_integer("session_count"), 1);
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}
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bool NetQueryDispatcher::get_use_pfs() {
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return G()->shared_config().get_option_boolean("use_pfs") || get_session_count() > 1;
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}
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NetQueryDispatcher::NetQueryDispatcher(std::function<ActorShared<>()> create_reference) {
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auto s_main_dc_id = G()->td_db()->get_binlog_pmc()->get("main_dc_id");
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if (!s_main_dc_id.empty()) {
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main_dc_id_ = to_integer<int32>(s_main_dc_id);
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}
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LOG(INFO) << tag("main_dc_id", main_dc_id_.load(std::memory_order_relaxed));
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delayer_ = create_actor<NetQueryDelayer>("NetQueryDelayer", create_reference());
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dc_auth_manager_ = create_actor<DcAuthManager>("DcAuthManager", create_reference());
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common_public_rsa_key_ = std::make_shared<PublicRsaKeyShared>(DcId::empty());
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public_rsa_key_watchdog_ = create_actor<PublicRsaKeyWatchdog>("PublicRsaKeyWatchdog", create_reference());
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td_guard_ = create_shared_lambda_guard([actor = create_reference()] {});
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}
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NetQueryDispatcher::NetQueryDispatcher() = default;
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NetQueryDispatcher::~NetQueryDispatcher() = default;
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void NetQueryDispatcher::try_fix_migrate(NetQueryPtr &net_query) {
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auto msg = net_query->error().message();
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static constexpr CSlice prefixes[] = {"PHONE_MIGRATE_", "NETWORK_MIGRATE_", "USER_MIGRATE_"};
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for (auto &prefix : prefixes) {
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if (msg.substr(0, prefix.size()) == prefix) {
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int32 new_main_dc_id = to_integer<int32>(msg.substr(prefix.size()));
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if (!DcId::is_valid(new_main_dc_id)) {
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LOG(FATAL) << "Receive " << prefix << " to wrong dc " << new_main_dc_id;
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}
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if (new_main_dc_id != main_dc_id_.load(std::memory_order_relaxed)) {
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// Very rare event. Mutex is ok.
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std::lock_guard<std::mutex> guard(main_dc_id_mutex_);
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if (new_main_dc_id != main_dc_id_) {
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LOG(INFO) << "Update: " << tag("main_dc_id", main_dc_id_.load(std::memory_order_relaxed));
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if (is_dc_inited(main_dc_id_.load(std::memory_order_relaxed))) {
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send_closure_later(dcs_[main_dc_id_ - 1].main_session_, &SessionMultiProxy::update_main_flag, false);
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}
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main_dc_id_ = new_main_dc_id;
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if (is_dc_inited(main_dc_id_.load(std::memory_order_relaxed))) {
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send_closure_later(dcs_[main_dc_id_ - 1].main_session_, &SessionMultiProxy::update_main_flag, true);
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}
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send_closure_later(dc_auth_manager_, &DcAuthManager::update_main_dc,
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DcId::internal(main_dc_id_.load(std::memory_order_relaxed)));
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G()->td_db()->get_binlog_pmc()->set("main_dc_id", to_string(main_dc_id_.load(std::memory_order_relaxed)));
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}
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}
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if (!net_query->dc_id().is_main()) {
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LOG(ERROR) << msg << " from query to non-main dc " << net_query->dc_id();
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net_query->resend(DcId::internal(new_main_dc_id));
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} else {
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net_query->resend();
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}
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break;
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}
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}
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}
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} // namespace td
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