transmission/libtransmission/session.h

1180 lines
35 KiB
C++

// This file Copyright © 2008-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#define TR_NAME "Transmission"
#include <array>
#include <cstddef> // size_t
#include <cstdint> // uintX_t
#include <future>
#include <memory>
#include <mutex>
#include <optional>
#include <string>
#include <string_view>
#include <tuple>
#include <utility> // std::pair
#include <vector>
#include "transmission.h"
#include "announce-list.h"
#include "announcer.h"
#include "bandwidth.h"
#include "bitfield.h"
#include "cache.h"
#include "interned-string.h"
#include "net.h" // tr_socket_t
#include "open-files.h"
#include "port-forwarding.h"
#include "quark.h"
#include "session-alt-speeds.h"
#include "session-id.h"
#include "session-settings.h"
#include "session-thread.h"
#include "stats.h"
#include "torrents.h"
#include "tr-dht.h"
#include "tr-lpd.h"
#include "utils-ev.h"
#include "verify.h"
#include "web.h"
tr_peer_id_t tr_peerIdInit();
struct event_base;
class tr_lpd;
class tr_port_forwarding;
class tr_rpc_server;
class tr_session_thread;
class tr_web;
struct struct_utp_context;
struct tr_announcer;
struct tr_variant;
namespace libtransmission
{
class Blocklist;
class Dns;
class Timer;
class TimerMaker;
} // namespace libtransmission
namespace libtransmission::test
{
class SessionTest;
} // namespace libtransmission::test
/** @brief handle to an active libtransmission session */
struct tr_session
{
private:
class BoundSocket
{
public:
using IncomingCallback = void (*)(tr_socket_t, void*);
BoundSocket(struct event_base*, tr_address const& addr, tr_port port, IncomingCallback cb, void* cb_data);
BoundSocket(BoundSocket&&) = delete;
BoundSocket(BoundSocket const&) = delete;
BoundSocket operator=(BoundSocket&&) = delete;
BoundSocket operator=(BoundSocket const&) = delete;
~BoundSocket();
private:
static void onCanRead(evutil_socket_t fd, short /*what*/, void* vself)
{
auto* const self = static_cast<BoundSocket*>(vself);
self->cb_(fd, self->cb_data_);
}
IncomingCallback cb_;
void* cb_data_;
tr_socket_t socket_ = TR_BAD_SOCKET;
libtransmission::evhelpers::event_unique_ptr ev_;
};
class AltSpeedMediator final : public tr_session_alt_speeds::Mediator
{
public:
explicit AltSpeedMediator(tr_session& session) noexcept
: session_{ session }
{
}
void isActiveChanged(bool is_active, tr_session_alt_speeds::ChangeReason reason) override;
[[nodiscard]] time_t time() override;
~AltSpeedMediator() noexcept override = default;
private:
tr_session& session_;
};
class AnnouncerUdpMediator final : public tr_announcer_udp::Mediator
{
public:
explicit AnnouncerUdpMediator(tr_session& session) noexcept
: session_{ session }
{
}
~AnnouncerUdpMediator() noexcept override = default;
void sendto(void const* buf, size_t buflen, sockaddr const* addr, socklen_t addrlen) override
{
session_.udp_core_->sendto(buf, buflen, addr, addrlen);
}
[[nodiscard]] std::optional<tr_address> announceIP() const override
{
if (!session_.useAnnounceIP())
{
return {};
}
return tr_address::fromString(session_.announceIP());
}
private:
tr_session& session_;
};
class DhtMediator : public tr_dht::Mediator
{
public:
DhtMediator(tr_session& session) noexcept
: session_{ session }
{
}
~DhtMediator() noexcept override = default;
[[nodiscard]] std::vector<tr_torrent_id_t> torrentsAllowingDHT() const override;
[[nodiscard]] tr_sha1_digest_t torrentInfoHash(tr_torrent_id_t id) const override;
[[nodiscard]] std::string_view configDir() const override
{
return session_.config_dir_;
}
[[nodiscard]] libtransmission::TimerMaker& timerMaker() override
{
return session_.timerMaker();
}
void addPex(tr_sha1_digest_t const&, tr_pex const* pex, size_t n_pex) override;
private:
tr_session& session_;
};
class PortForwardingMediator final : public tr_port_forwarding::Mediator
{
public:
explicit PortForwardingMediator(tr_session& session) noexcept
: session_{ session }
{
}
[[nodiscard]] tr_address incomingPeerAddress() const override
{
return session_.publicAddress(TR_AF_INET).address;
}
[[nodiscard]] tr_port localPeerPort() const override
{
return session_.localPeerPort();
}
[[nodiscard]] libtransmission::TimerMaker& timerMaker() override
{
return session_.timerMaker();
}
void onPortForwarded(tr_port public_port) override
{
if (session_.advertised_peer_port_ != public_port)
{
session_.advertised_peer_port_ = public_port;
session_.onAdvertisedPeerPortChanged();
}
}
private:
tr_session& session_;
};
class WebMediator final : public tr_web::Mediator
{
public:
explicit WebMediator(tr_session* session) noexcept
: session_{ session }
{
}
[[nodiscard]] std::optional<std::string> cookieFile() const override;
[[nodiscard]] std::optional<std::string> publicAddressV4() const override;
[[nodiscard]] std::optional<std::string> publicAddressV6() const override;
[[nodiscard]] std::optional<std::string_view> userAgent() const override;
[[nodiscard]] unsigned int clamp(int torrent_id, unsigned int byte_count) const override;
void notifyBandwidthConsumed(int torrent_id, size_t byte_count) override;
// runs the tr_web::fetch response callback in the libtransmission thread
void run(tr_web::FetchDoneFunc&& func, tr_web::FetchResponse&& response) const override;
private:
tr_session* const session_;
};
class LpdMediator final : public tr_lpd::Mediator
{
public:
explicit LpdMediator(tr_session& session) noexcept
: session_{ session }
{
}
[[nodiscard]] tr_port port() const override
{
return session_.advertisedPeerPort();
}
[[nodiscard]] bool allowsLPD() const override
{
return session_.allowsLPD();
}
[[nodiscard]] libtransmission::TimerMaker& timerMaker() override
{
return session_.timerMaker();
}
[[nodiscard]] std::vector<TorrentInfo> torrents() const override;
bool onPeerFound(std::string_view info_hash_str, tr_address address, tr_port port) override;
void setNextAnnounceTime(std::string_view info_hash_str, time_t announce_after) override;
private:
tr_session& session_;
};
// UDP connectivity used for the DHT and µTP
class tr_udp_core
{
public:
tr_udp_core(tr_session& session, tr_port udp_port);
~tr_udp_core();
void sendto(void const* buf, size_t buflen, struct sockaddr const* to, socklen_t const tolen) const;
[[nodiscard]] constexpr auto socket4() const noexcept
{
return udp_socket_;
}
[[nodiscard]] constexpr auto socket6() const noexcept
{
return udp6_socket_;
}
private:
void set_socket_buffers();
void set_socket_tos()
{
session_.setSocketTOS(udp_socket_, TR_AF_INET);
session_.setSocketTOS(udp6_socket_, TR_AF_INET6);
}
tr_port const udp_port_;
tr_session& session_;
tr_socket_t udp_socket_ = TR_BAD_SOCKET;
tr_socket_t udp6_socket_ = TR_BAD_SOCKET;
libtransmission::evhelpers::event_unique_ptr udp4_event_;
libtransmission::evhelpers::event_unique_ptr udp6_event_;
std::optional<in6_addr> udp6_bound_;
void rebind_ipv6(bool);
};
public:
explicit tr_session(std::string_view config_dir, tr_variant* settings_dict = nullptr);
[[nodiscard]] std::string_view sessionId() const noexcept
{
return session_id_.sv();
}
[[nodiscard]] libtransmission::TimerMaker& timerMaker() noexcept
{
return *timer_maker_;
}
[[nodiscard]] auto amInSessionThread() const noexcept
{
return session_thread_->amInSessionThread();
}
void runInSessionThread(std::function<void(void)>&& func)
{
session_thread_->run(std::move(func));
}
template<typename Func, typename... Args>
void runInSessionThread(Func&& func, Args&&... args)
{
session_thread_->run(std::forward<Func&&>(func), std::forward<Args>(args)...);
}
[[nodiscard]] auto eventBase() noexcept
{
return session_thread_->eventBase();
}
[[nodiscard]] constexpr auto& torrents()
{
return torrents_;
}
[[nodiscard]] constexpr auto const& torrents() const
{
return torrents_;
}
[[nodiscard]] auto unique_lock() const
{
return std::unique_lock(session_mutex_);
}
// paths
[[nodiscard]] constexpr auto const& configDir() const noexcept
{
return config_dir_;
}
[[nodiscard]] constexpr auto const& torrentDir() const noexcept
{
return torrent_dir_;
}
[[nodiscard]] constexpr auto const& resumeDir() const noexcept
{
return resume_dir_;
}
[[nodiscard]] constexpr auto const& downloadDir() const noexcept
{
return settings_.download_dir;
}
void setDownloadDir(std::string_view dir)
{
settings_.download_dir = dir;
}
// default trackers
// (trackers to apply automatically to public torrents)
[[nodiscard]] constexpr auto const& defaultTrackersStr() const noexcept
{
return settings_.default_trackers_str;
}
[[nodiscard]] constexpr auto const& defaultTrackers() const noexcept
{
return default_trackers_;
}
void setDefaultTrackers(std::string_view trackers);
// incomplete dir
[[nodiscard]] constexpr auto const& incompleteDir() const noexcept
{
return settings_.incomplete_dir;
}
void setIncompleteDir(std::string_view dir)
{
settings_.incomplete_dir = dir;
}
[[nodiscard]] constexpr auto useIncompleteDir() const noexcept
{
return settings_.incomplete_dir_enabled;
}
constexpr void useIncompleteDir(bool enabled) noexcept
{
settings_.incomplete_dir_enabled = enabled;
}
// scripts
constexpr void useScript(TrScript i, bool enabled)
{
scriptEnabledFlag(i) = enabled;
}
[[nodiscard]] constexpr bool useScript(TrScript i) const
{
return const_cast<tr_session*>(this)->scriptEnabledFlag(i);
}
void setScript(TrScript i, std::string_view path)
{
scriptFilename(i) = path;
}
[[nodiscard]] constexpr auto const& script(TrScript i) const
{
return const_cast<tr_session*>(this)->scriptFilename(i);
}
// blocklist
[[nodiscard]] constexpr auto useBlocklist() const noexcept
{
return settings_.blocklist_enabled;
}
void useBlocklist(bool enabled);
[[nodiscard]] constexpr auto const& blocklistUrl() const noexcept
{
return settings_.blocklist_url;
}
void setBlocklistUrl(std::string_view url)
{
settings_.blocklist_url = url;
}
// RPC
void setRpcWhitelist(std::string_view whitelist) const;
void useRpcWhitelist(bool enabled) const;
[[nodiscard]] bool useRpcWhitelist() const;
[[nodiscard]] constexpr auto externalIP() const noexcept
{
return external_ip_;
}
void setExternalIP(tr_address external_ip)
{
external_ip_ = external_ip;
}
// peer networking
[[nodiscard]] constexpr auto const& peerCongestionAlgorithm() const noexcept
{
return settings_.peer_congestion_algorithm;
}
void setPeerCongestionAlgorithm(std::string_view algorithm)
{
settings_.peer_congestion_algorithm = algorithm;
}
void setSocketTOS(tr_socket_t sock, tr_address_type type) const
{
tr_netSetTOS(sock, settings_.peer_socket_tos, type);
}
[[nodiscard]] constexpr auto peerLimit() const noexcept
{
return settings_.peer_limit_global;
}
[[nodiscard]] constexpr auto peerLimitPerTorrent() const noexcept
{
return settings_.peer_limit_per_torrent;
}
[[nodiscard]] constexpr bool incPeerCount() noexcept
{
if (this->peer_count_ >= this->peerLimit())
{
return false;
}
++this->peer_count_;
return true;
}
constexpr void decPeerCount() noexcept
{
if (this->peer_count_ > 0)
{
--this->peer_count_;
}
}
// bandwidth
[[nodiscard]] tr_bandwidth& getBandwidthGroup(std::string_view name);
//
[[nodiscard]] constexpr auto& openFiles() noexcept
{
return open_files_;
}
void closeTorrentFiles(tr_torrent* tor) noexcept;
void closeTorrentFile(tr_torrent* tor, tr_file_index_t file_num) noexcept;
// announce ip
[[nodiscard]] constexpr std::string const& announceIP() const noexcept
{
return settings_.announce_ip;
}
void setAnnounceIP(std::string_view ip)
{
settings_.announce_ip = ip;
}
[[nodiscard]] constexpr bool useAnnounceIP() const noexcept
{
return settings_.announce_ip_enabled;
}
constexpr void useAnnounceIP(bool enabled) noexcept
{
settings_.announce_ip_enabled = enabled;
}
// callbacks
using queue_start_callback_t = void (*)(tr_session*, tr_torrent*, void* user_data);
constexpr void setQueueStartCallback(queue_start_callback_t cb, void* user_data)
{
queue_start_callback_ = cb;
queue_start_user_data_ = user_data;
}
void onQueuedTorrentStarted(tr_torrent* tor)
{
if (queue_start_callback_ != nullptr)
{
queue_start_callback_(this, tor, queue_start_user_data_);
}
}
constexpr void setIdleLimitHitCallback(tr_session_idle_limit_hit_func cb, void* user_data)
{
idle_limit_hit_callback_ = cb;
idle_limit_hit_user_data_ = user_data;
}
void onIdleLimitHit(tr_torrent* tor)
{
if (idle_limit_hit_callback_ != nullptr)
{
idle_limit_hit_callback_(this, tor, idle_limit_hit_user_data_);
}
}
constexpr void setRatioLimitHitCallback(tr_session_ratio_limit_hit_func cb, void* user_data)
{
ratio_limit_hit_cb_ = cb;
ratio_limit_hit_user_data_ = user_data;
}
void onRatioLimitHit(tr_torrent* tor)
{
if (ratio_limit_hit_cb_ != nullptr)
{
ratio_limit_hit_cb_(this, tor, ratio_limit_hit_user_data_);
}
}
constexpr void setMetadataCallback(tr_session_metadata_func cb, void* user_data)
{
got_metadata_cb_ = cb;
got_metadata_user_data_ = user_data;
}
void onMetadataCompleted(tr_torrent* tor)
{
if (got_metadata_cb_ != nullptr)
{
got_metadata_cb_(this, tor, got_metadata_user_data_);
}
}
constexpr void setTorrentCompletenessCallback(tr_torrent_completeness_func cb, void* user_data)
{
completeness_func_ = cb;
completeness_func_user_data_ = user_data;
}
void onTorrentCompletenessChanged(tr_torrent* tor, tr_completeness completeness, bool was_running)
{
if (completeness_func_ != nullptr)
{
completeness_func_(tor, completeness, was_running, completeness_func_user_data_);
}
}
/// stats
[[nodiscard]] constexpr auto& stats() noexcept
{
return session_stats_;
}
[[nodiscard]] constexpr auto const& stats() const noexcept
{
return session_stats_;
}
constexpr void addUploaded(uint32_t n_bytes) noexcept
{
stats().addUploaded(n_bytes);
}
constexpr void addDownloaded(uint32_t n_bytes) noexcept
{
stats().addDownloaded(n_bytes);
}
constexpr void addFileCreated() noexcept
{
stats().addFileCreated();
}
// The incoming peer port that's been opened on the local machine
// that Transmission is running on.
[[nodiscard]] constexpr tr_port localPeerPort() const noexcept
{
return local_peer_port_;
}
[[nodiscard]] constexpr tr_port udpPort() const noexcept
{
// Always use the same port number that's used for incoming TCP connections.
// This simplifies port forwarding and reduces the chance of confusion,
// since incoming UDP and TCP connections will use the same port number
return localPeerPort();
}
// The incoming peer port that's been opened on the public-facing
// device. This is usually the same as localPeerPort() but can differ,
// e.g. if the public device is a router that chose to use a different
// port than the one requested by Transmission.
[[nodiscard]] constexpr tr_port advertisedPeerPort() const noexcept
{
return advertised_peer_port_;
}
[[nodiscard]] constexpr auto queueEnabled(tr_direction dir) const noexcept
{
return dir == TR_DOWN ? settings_.download_queue_enabled : settings_.seed_queue_enabled;
}
[[nodiscard]] constexpr auto queueSize(tr_direction dir) const noexcept
{
return dir == TR_DOWN ? settings_.download_queue_size : settings_.seed_queue_size;
}
[[nodiscard]] constexpr auto queueStalledEnabled() const noexcept
{
return settings_.queue_stalled_enabled;
}
[[nodiscard]] constexpr auto queueStalledMinutes() const noexcept
{
return settings_.queue_stalled_minutes;
}
[[nodiscard]] constexpr auto uploadSlotsPerTorrent() const noexcept
{
return settings_.upload_slots_per_torrent;
}
[[nodiscard]] constexpr auto isClosing() const noexcept
{
return is_closing_;
}
[[nodiscard]] constexpr auto encryptionMode() const noexcept
{
return settings_.encryption_mode;
}
[[nodiscard]] constexpr auto preallocationMode() const noexcept
{
return settings_.preallocation_mode;
}
[[nodiscard]] constexpr auto shouldScrapePausedTorrents() const noexcept
{
return settings_.should_scrape_paused_torrents;
}
[[nodiscard]] constexpr auto shouldPauseAddedTorrents() const noexcept
{
return !settings_.should_start_added_torrents;
}
[[nodiscard]] constexpr auto shouldDeleteSource() const noexcept
{
return settings_.should_delete_source_torrents;
}
[[nodiscard]] constexpr auto allowsDHT() const noexcept
{
return settings_.dht_enabled;
}
[[nodiscard]] constexpr bool allowsLPD() const noexcept
{
return settings_.lpd_enabled;
}
[[nodiscard]] constexpr auto allowsPEX() const noexcept
{
return settings_.pex_enabled;
}
[[nodiscard]] constexpr auto allowsTCP() const noexcept
{
return settings_.tcp_enabled;
}
[[nodiscard]] bool allowsUTP() const noexcept;
[[nodiscard]] constexpr auto allowsPrefetch() const noexcept
{
return settings_.is_prefetch_enabled;
}
[[nodiscard]] constexpr auto isIdleLimited() const noexcept
{
return settings_.idle_seeding_limit_enabled;
}
[[nodiscard]] constexpr auto idleLimitMinutes() const noexcept
{
return settings_.idle_seeding_limit_minutes;
}
[[nodiscard]] std::vector<tr_torrent*> getAllTorrents() const
{
return std::vector<tr_torrent*>{ std::begin(torrents()), std::end(torrents()) };
}
/*module_visible*/
auto rpcNotify(tr_rpc_callback_type type, tr_torrent* tor = nullptr)
{
if (rpc_func_ != nullptr)
{
return (*rpc_func_)(this, type, tor, rpc_func_user_data_);
}
return TR_RPC_OK;
}
[[nodiscard]] size_t countQueueFreeSlots(tr_direction dir) const noexcept;
[[nodiscard]] std::vector<tr_torrent*> getNextQueuedTorrents(tr_direction dir, size_t num_wanted) const;
[[nodiscard]] bool addressIsBlocked(tr_address const& addr) const noexcept;
struct PublicAddressResult
{
tr_address address;
bool is_default_value;
};
[[nodiscard]] PublicAddressResult publicAddress(tr_address_type type) const noexcept;
[[nodiscard]] constexpr auto speedLimitKBps(tr_direction dir) const noexcept
{
return dir == TR_DOWN ? settings_.speed_limit_down : settings_.speed_limit_up;
}
[[nodiscard]] constexpr auto isSpeedLimited(tr_direction dir) const noexcept
{
return dir == TR_DOWN ? settings_.speed_limit_down_enabled : settings_.speed_limit_up_enabled;
}
[[nodiscard]] auto pieceSpeedBps(tr_direction dir) const noexcept
{
return top_bandwidth_.getPieceSpeedBytesPerSecond(0, dir);
}
[[nodiscard]] std::optional<tr_bytes_per_second_t> activeSpeedLimitBps(tr_direction dir) const noexcept;
[[nodiscard]] constexpr auto isIncompleteFileNamingEnabled() const noexcept
{
return settings_.is_incomplete_file_naming_enabled;
}
[[nodiscard]] constexpr auto isPortRandom() const noexcept
{
return settings_.peer_port_random_on_start;
}
[[nodiscard]] constexpr auto isRatioLimited() const noexcept
{
return settings_.ratio_limit_enabled;
}
[[nodiscard]] constexpr auto desiredRatio() const noexcept
{
return settings_.ratio_limit;
}
[[nodiscard]] constexpr auto peerIdTTLHours() const noexcept
{
return settings_.peer_id_ttl_hours;
}
void verifyRemove(tr_torrent* tor)
{
if (verifier_)
{
verifier_->remove(tor);
}
}
void verifyAdd(tr_torrent* tor)
{
if (verifier_)
{
verifier_->add(tor);
}
}
void fetch(tr_web::FetchOptions&& options) const
{
web_->fetch(std::move(options));
}
[[nodiscard]] auto const& bandwidthGroups() const noexcept
{
return bandwidth_groups_;
}
void addIncoming(tr_address const& addr, tr_port port, struct tr_peer_socket const socket);
void addTorrent(tr_torrent* tor);
void addDhtNode(tr_address const& addr, tr_port port)
{
if (dht_)
{
dht_->addNode(addr, port);
}
}
private:
constexpr bool& scriptEnabledFlag(TrScript i)
{
if (i == TR_SCRIPT_ON_TORRENT_ADDED)
{
return settings_.script_torrent_added_enabled;
}
if (i == TR_SCRIPT_ON_TORRENT_DONE)
{
return settings_.script_torrent_done_enabled;
}
return settings_.script_torrent_done_seeding_enabled;
}
constexpr std::string& scriptFilename(TrScript i)
{
if (i == TR_SCRIPT_ON_TORRENT_ADDED)
{
return settings_.script_torrent_added_filename;
}
if (i == TR_SCRIPT_ON_TORRENT_DONE)
{
return settings_.script_torrent_done_filename;
}
return settings_.script_torrent_done_seeding_filename;
}
[[nodiscard]] tr_port randomPort() const;
void onAdvertisedPeerPortChanged();
struct init_data;
void initImpl(init_data&);
void setSettings(tr_variant* settings_dict, bool force);
void setSettings(tr_session_settings&& settings, bool force);
void closeImplPart1(std::promise<void>* closed_promise);
void closeImplPart2(std::promise<void>* closed_promise);
void onNowTimer();
static void onIncomingPeerConnection(tr_socket_t fd, void* vsession);
friend class libtransmission::test::SessionTest;
friend struct tr_bindinfo;
friend bool tr_blocklistExists(tr_session const* session);
friend bool tr_sessionGetAntiBruteForceEnabled(tr_session const* session);
friend bool tr_sessionIsPortForwardingEnabled(tr_session const* session);
friend bool tr_sessionIsRPCEnabled(tr_session const* session);
friend bool tr_sessionIsRPCPasswordEnabled(tr_session const* session);
friend bool tr_sessionUsesAltSpeed(tr_session const* session);
friend bool tr_sessionUsesAltSpeedTime(tr_session const* session);
friend char const* tr_sessionGetRPCPassword(tr_session const* session);
friend char const* tr_sessionGetRPCUsername(tr_session const* session);
friend char const* tr_sessionGetRPCWhitelist(tr_session const* session);
friend int tr_sessionGetAntiBruteForceThreshold(tr_session const* session);
friend size_t tr_blocklistGetRuleCount(tr_session const* session);
friend size_t tr_blocklistSetContent(tr_session* session, char const* content_filename);
friend size_t tr_sessionGetAltSpeedBegin(tr_session const* session);
friend size_t tr_sessionGetAltSpeedEnd(tr_session const* session);
friend size_t tr_sessionGetCacheLimit_MB(tr_session const* session);
friend tr_kilobytes_per_second_t tr_sessionGetAltSpeed_KBps(tr_session const* session, tr_direction dir);
friend tr_kilobytes_per_second_t tr_sessionGetSpeedLimit_KBps(tr_session const* session, tr_direction dir);
friend tr_port_forwarding_state tr_sessionGetPortForwarding(tr_session const* session);
friend tr_sched_day tr_sessionGetAltSpeedDay(tr_session const* session);
friend tr_session* tr_sessionInit(char const* config_dir, bool message_queueing_enabled, tr_variant* client_settings);
friend uint16_t tr_sessionGetPeerPort(tr_session const* session);
friend uint16_t tr_sessionGetRPCPort(tr_session const* session);
friend uint16_t tr_sessionSetPeerPortRandom(tr_session* session);
friend void tr_sessionClose(tr_session* session);
friend void tr_sessionGetSettings(tr_session const* s, tr_variant* setme_dictionary);
friend void tr_sessionLimitSpeed(tr_session* session, tr_direction dir, bool limited);
friend void tr_sessionReloadBlocklists(tr_session* session);
friend void tr_sessionSet(tr_session* session, tr_variant* settings);
friend void tr_sessionSetAltSpeedBegin(tr_session* session, size_t minutes_since_midnight);
friend void tr_sessionSetAltSpeedDay(tr_session* session, tr_sched_day days);
friend void tr_sessionSetAltSpeedEnd(tr_session* session, size_t minutes_since_midnight);
friend void tr_sessionSetAltSpeedFunc(tr_session* session, tr_altSpeedFunc func, void* user_data);
friend void tr_sessionSetAltSpeed_KBps(tr_session* session, tr_direction dir, tr_bytes_per_second_t limit);
friend void tr_sessionSetAntiBruteForceEnabled(tr_session* session, bool is_enabled);
friend void tr_sessionSetAntiBruteForceThreshold(tr_session* session, int max_bad_requests);
friend void tr_sessionSetCacheLimit_MB(tr_session* session, size_t mb);
friend void tr_sessionSetDHTEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetDeleteSource(tr_session* session, bool delete_source);
friend void tr_sessionSetEncryption(tr_session* session, tr_encryption_mode mode);
friend void tr_sessionSetIdleLimit(tr_session* session, uint16_t idle_minutes);
friend void tr_sessionSetIdleLimited(tr_session* session, bool is_limited);
friend void tr_sessionSetIncompleteFileNamingEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetLPDEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetPaused(tr_session* session, bool is_paused);
friend void tr_sessionSetPeerLimit(tr_session* session, uint16_t max_global_peers);
friend void tr_sessionSetPeerLimitPerTorrent(tr_session* session, uint16_t max_peers);
friend void tr_sessionSetPeerPort(tr_session* session, uint16_t hport);
friend void tr_sessionSetPeerPortRandomOnStart(tr_session* session, bool random);
friend void tr_sessionSetPexEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetPortForwardingEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetQueueEnabled(tr_session* session, tr_direction dir, bool do_limit_simultaneous_torrents);
friend void tr_sessionSetQueueSize(tr_session* session, tr_direction dir, size_t max_simultaneous_torrents);
friend void tr_sessionSetQueueStalledEnabled(tr_session* session, bool is_enabled);
friend void tr_sessionSetQueueStalledMinutes(tr_session* session, int minutes);
friend void tr_sessionSetRPCCallback(tr_session* session, tr_rpc_func func, void* user_data);
friend void tr_sessionSetRPCEnabled(tr_session* session, bool is_enabled);
friend void tr_sessionSetRPCPassword(tr_session* session, char const* password);
friend void tr_sessionSetRPCPasswordEnabled(tr_session* session, bool enabled);
friend void tr_sessionSetRPCPort(tr_session* session, uint16_t hport);
friend void tr_sessionSetRPCUsername(tr_session* session, char const* username);
friend void tr_sessionSetRatioLimit(tr_session* session, double desired_ratio);
friend void tr_sessionSetRatioLimited(tr_session* session, bool is_limited);
friend void tr_sessionSetSpeedLimit_KBps(tr_session* session, tr_direction dir, tr_kilobytes_per_second_t limit);
friend void tr_sessionSetUTPEnabled(tr_session* session, bool enabled);
friend void tr_sessionUseAltSpeed(tr_session* session, bool enabled);
friend void tr_sessionUseAltSpeedTime(tr_session* session, bool enabled);
public:
/// constexpr fields
static constexpr std::array<std::tuple<tr_quark, tr_quark, TrScript>, 3> Scripts{
{ { TR_KEY_script_torrent_added_enabled, TR_KEY_script_torrent_added_filename, TR_SCRIPT_ON_TORRENT_ADDED },
{ TR_KEY_script_torrent_done_enabled, TR_KEY_script_torrent_done_filename, TR_SCRIPT_ON_TORRENT_DONE },
{ TR_KEY_script_torrent_done_seeding_enabled,
TR_KEY_script_torrent_done_seeding_filename,
TR_SCRIPT_ON_TORRENT_DONE_SEEDING } }
};
private:
/// const fields
std::string const config_dir_;
std::string const resume_dir_;
std::string const torrent_dir_;
std::string const blocklist_dir_;
std::unique_ptr<tr_session_thread> const session_thread_;
// depends-on: session_thread_
std::unique_ptr<libtransmission::TimerMaker> const timer_maker_;
/// trivial type fields
tr_session_settings settings_;
std::optional<tr_address> external_ip_;
queue_start_callback_t queue_start_callback_ = nullptr;
void* queue_start_user_data_ = nullptr;
tr_session_idle_limit_hit_func idle_limit_hit_callback_ = nullptr;
void* idle_limit_hit_user_data_ = nullptr;
tr_session_ratio_limit_hit_func ratio_limit_hit_cb_ = nullptr;
void* ratio_limit_hit_user_data_ = nullptr;
tr_session_metadata_func got_metadata_cb_ = nullptr;
void* got_metadata_user_data_ = nullptr;
tr_torrent_completeness_func completeness_func_ = nullptr;
void* completeness_func_user_data_ = nullptr;
tr_rpc_func rpc_func_ = nullptr;
void* rpc_func_user_data_ = nullptr;
tr_altSpeedFunc alt_speed_active_changed_func_ = nullptr;
void* alt_speed_active_changed_func_user_data_ = nullptr;
// The local peer port that we bind a socket to for listening
// to incoming peer connections. Usually the same as
// `settings_.peer_port` but can differ if
// `settings_.peer_port_random_on_start` is enabled.
tr_port local_peer_port_;
// The incoming peer port that's been opened on the public-facing
// device. This is usually the same as localPeerPort() but can differ,
// e.g. if the public device is a router that chose to use a different
// port than the one requested by Transmission.
tr_port advertised_peer_port_;
uint16_t peer_count_ = 0;
bool is_closing_ = false;
/// fields that aren't trivial,
/// but are self-contained / don't hold references to others
mutable std::recursive_mutex session_mutex_;
tr_stats session_stats_{ config_dir_, time(nullptr) };
tr_announce_list default_trackers_;
tr_session_id session_id_;
tr_open_files open_files_;
std::vector<libtransmission::Blocklist> blocklists_;
/// other fields
// depends-on: session_thread_, settings_.bind_address_ipv4, local_peer_port_
std::optional<BoundSocket> bound_ipv4_;
// depends-on: session_thread_, settings_.bind_address_ipv6, local_peer_port_
std::optional<BoundSocket> bound_ipv6_;
public:
// depends-on: settings_, announcer_udp_
// FIXME(ckerr): circular dependency udp_core -> announcer_udp -> announcer_udp_mediator -> udp_core
std::unique_ptr<tr_udp_core> udp_core_;
// monitors the "global pool" speeds
tr_bandwidth top_bandwidth_;
private:
// depends-on: top_bandwidth_
std::vector<std::pair<tr_interned_string, std::unique_ptr<tr_bandwidth>>> bandwidth_groups_;
// depends-on: timer_maker_, settings_, local_peer_port_
PortForwardingMediator port_forwarding_mediator_{ *this };
std::unique_ptr<tr_port_forwarding> port_forwarding_ = tr_port_forwarding::create(port_forwarding_mediator_);
// depends-on: session_thread_, top_bandwidth_
AltSpeedMediator alt_speed_mediator_{ *this };
tr_session_alt_speeds alt_speeds_{ alt_speed_mediator_ };
// depends-on: open_files_
tr_torrents torrents_;
// depends-on: settings_, session_thread_, torrents_
WebMediator web_mediator_{ this };
std::unique_ptr<tr_web> web_ = tr_web::create(this->web_mediator_);
public:
// depends-on: settings_, open_files_, torrents_
std::unique_ptr<Cache> cache = std::make_unique<Cache>(torrents_, 1024 * 1024 * 2);
private:
// depends-on: timer_maker_, top_bandwidth_, torrents_, web_
std::unique_ptr<struct tr_peerMgr, void (*)(struct tr_peerMgr*)> peer_mgr_;
// depends-on: peer_mgr_, advertised_peer_port_, torrents_
LpdMediator lpd_mediator_{ *this };
// depends-on: lpd_mediator_
std::unique_ptr<tr_lpd> lpd_;
// depends-on: udp_core_
AnnouncerUdpMediator announcer_udp_mediator_{ *this };
// depends-on: timer_maker_, torrents_, peer_mgr_
DhtMediator dht_mediator_{ *this };
public:
// depends-on: announcer_udp_mediator_
std::unique_ptr<tr_announcer_udp> announcer_udp_ = tr_announcer_udp::create(announcer_udp_mediator_);
// depends-on: settings_, torrents_, web_, announcer_udp_
struct tr_announcer* announcer = nullptr;
// depends-on: public_peer_port_, udp_core_, dht_mediator_
std::unique_ptr<tr_dht> dht_;
private:
// depends-on: session_thread_, timer_maker_, settings_, torrents_, web_
std::unique_ptr<tr_rpc_server> rpc_server_;
// depends-on: alt_speeds_, udp_core_, torrents_
std::unique_ptr<libtransmission::Timer> now_timer_;
// depends-on: torrents_
std::unique_ptr<libtransmission::Timer> save_timer_;
std::unique_ptr<tr_verify_worker> verifier_ = std::make_unique<tr_verify_worker>();
public:
struct struct_utp_context* utp_context = nullptr;
std::unique_ptr<libtransmission::Timer> utp_timer;
};
constexpr bool tr_isPriority(tr_priority_t p)
{
return p == TR_PRI_LOW || p == TR_PRI_NORMAL || p == TR_PRI_HIGH;
}