297 lines
14 KiB
C++
297 lines
14 KiB
C++
/*
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Copyright (c) 2017, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_TORRENT_FLAGS_HPP
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#define TORRENT_TORRENT_FLAGS_HPP
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#include <cstdint>
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#include "libtorrent/config.hpp"
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#include "libtorrent/flags.hpp"
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namespace libtorrent {
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using torrent_flags_t = flags::bitfield_flag<std::uint64_t, struct torrent_flags_tag>;
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namespace torrent_flags {
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#if TORRENT_ABI_VERSION == 1
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#endif
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// If ``seed_mode`` is set, libtorrent will assume that all files
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// are present for this torrent and that they all match the hashes in
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// the torrent file. Each time a peer requests to download a block,
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// the piece is verified against the hash, unless it has been verified
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// already. If a hash fails, the torrent will automatically leave the
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// seed mode and recheck all the files. The use case for this mode is
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// if a torrent is created and seeded, or if the user already know
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// that the files are complete, this is a way to avoid the initial
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// file checks, and significantly reduce the startup time.
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//
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// Setting ``seed_mode`` on a torrent without metadata (a
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// .torrent file) is a no-op and will be ignored.
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//
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// It is not possible to *set* the ``seed_mode`` flag on a torrent after it has
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// been added to a session. It is possible to *clear* it though.
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constexpr torrent_flags_t seed_mode = 0_bit;
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// If ``upload_mode`` is set, the torrent will be initialized in
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// upload-mode, which means it will not make any piece requests. This
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// state is typically entered on disk I/O errors, and if the torrent
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// is also auto managed, it will be taken out of this state
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// periodically (see ``settings_pack::optimistic_disk_retry``).
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//
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// This mode can be used to avoid race conditions when
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// adjusting priorities of pieces before allowing the torrent to start
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// downloading.
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//
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// If the torrent is auto-managed (``auto_managed``), the torrent
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// will eventually be taken out of upload-mode, regardless of how it
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// got there. If it's important to manually control when the torrent
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// leaves upload mode, don't make it auto managed.
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constexpr torrent_flags_t upload_mode = 1_bit;
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// determines if the torrent should be added in *share mode* or not.
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// Share mode indicates that we are not interested in downloading the
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// torrent, but merely want to improve our share ratio (i.e. increase
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// it). A torrent started in share mode will do its best to never
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// download more than it uploads to the swarm. If the swarm does not
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// have enough demand for upload capacity, the torrent will not
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// download anything. This mode is intended to be safe to add any
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// number of torrents to, without manual screening, without the risk
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// of downloading more than is uploaded.
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//
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// A torrent in share mode sets the priority to all pieces to 0,
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// except for the pieces that are downloaded, when pieces are decided
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// to be downloaded. This affects the progress bar, which might be set
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// to "100% finished" most of the time. Do not change file or piece
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// priorities for torrents in share mode, it will make it not work.
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//
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// The share mode has one setting, the share ratio target, see
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// ``settings_pack::share_mode_target`` for more info.
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constexpr torrent_flags_t share_mode = 2_bit;
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// determines if the IP filter should apply to this torrent or not. By
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// default all torrents are subject to filtering by the IP filter
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// (i.e. this flag is set by default). This is useful if certain
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// torrents needs to be exempt for some reason, being an auto-update
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// torrent for instance.
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constexpr torrent_flags_t apply_ip_filter = 3_bit;
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// specifies whether or not the torrent is paused. i.e. it won't connect to the tracker or any of the peers
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// until it's resumed. Note that a paused torrent that also has the
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// auto_managed flag set can be started at any time by libtorrent's queuing
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// logic. See queuing_.
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constexpr torrent_flags_t paused = 4_bit;
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// If the torrent is auto-managed (``auto_managed``), the torrent
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// may be resumed at any point, regardless of how it paused. If it's
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// important to manually control when the torrent is paused and
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// resumed, don't make it auto managed.
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//
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// If ``auto_managed`` is set, the torrent will be queued,
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// started and seeded automatically by libtorrent. When this is set,
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// the torrent should also be started as paused. The default queue
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// order is the order the torrents were added. They are all downloaded
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// in that order. For more details, see queuing_.
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constexpr torrent_flags_t auto_managed = 5_bit;
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// used in add_torrent_params to indicate that it's an error to attempt
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// to add a torrent that's already in the session. If it's not considered an
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// error, a handle to the existing torrent is returned.
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constexpr torrent_flags_t duplicate_is_error = 6_bit;
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// on by default and means that this torrent will be part of state
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// updates when calling post_torrent_updates().
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constexpr torrent_flags_t update_subscribe = 7_bit;
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// sets the torrent into super seeding/initial seeding mode. If the torrent
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// is not a seed, this flag has no effect.
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constexpr torrent_flags_t super_seeding = 8_bit;
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// sets the sequential download state for the torrent. In this mode the
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// piece picker will pick pieces with low index numbers before pieces with
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// high indices. The actual pieces that are picked depend on other factors
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// still, such as which pieces a peer has and whether it is in parole mode
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// or "prefer whole pieces"-mode. Sequential mode is not ideal for streaming
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// media. For that, see set_piece_deadline() instead.
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constexpr torrent_flags_t sequential_download = 9_bit;
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// When this flag is set, the torrent will *force stop* whenever it
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// transitions from a non-data-transferring state into a data-transferring
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// state (referred to as being ready to download or seed). This is useful
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// for torrents that should not start downloading or seeding yet, but want
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// to be made ready to do so. A torrent may need to have its files checked
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// for instance, so it needs to be started and possibly queued for checking
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// (auto-managed and started) but as soon as it's done, it should be
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// stopped.
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//
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// *Force stopped* means auto-managed is set to false and it's paused. As
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// if the auto_manages flag is cleared and the paused flag is set on the torrent.
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//
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// Note that the torrent may transition into a downloading state while
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// setting this flag, and since the logic is edge triggered you may
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// miss the edge. To avoid this race, if the torrent already is in a
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// downloading state when this call is made, it will trigger the
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// stop-when-ready immediately.
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//
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// When the stop-when-ready logic fires, the flag is cleared. Any
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// subsequent transitions between downloading and non-downloading states
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// will not be affected, until this flag is set again.
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//
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// The behavior is more robust when setting this flag as part of adding
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// the torrent. See add_torrent_params.
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//
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// The stop-when-ready flag fixes the inherent race condition of waiting
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// for the state_changed_alert and then call pause(). The download/seeding
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// will most likely start in between posting the alert and receiving the
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// call to pause.
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//
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// A downloading state is one where peers are being connected. Which means
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// just downloading the metadata via the ``ut_metadata`` extension counts
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// as a downloading state. In order to stop a torrent once the metadata
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// has been downloaded, instead set all file priorities to dont_download
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constexpr torrent_flags_t stop_when_ready = 10_bit;
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// when this flag is set, the tracker list in the add_torrent_params
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// object override any trackers from the torrent file. If the flag is
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// not set, the trackers from the add_torrent_params object will be
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// added to the list of trackers used by the torrent.
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// This flag is set by read_resume_data() if there are trackers present in
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// the resume data file. This effectively makes the trackers saved in the
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// resume data take precedence over the original trackers. This includes if
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// there's an empty list of trackers, to support the case where they were
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// explicitly removed in the previous session.
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constexpr torrent_flags_t override_trackers = 11_bit;
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// If this flag is set, the web seeds from the add_torrent_params
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// object will override any web seeds in the torrent file. If it's not
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// set, web seeds in the add_torrent_params object will be added to the
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// list of web seeds used by the torrent.
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// This flag is set by read_resume_data() if there are web seeds present in
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// the resume data file. This effectively makes the web seeds saved in the
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// resume data take precedence over the original ones. This includes if
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// there's an empty list of web seeds, to support the case where they were
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// explicitly removed in the previous session.
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constexpr torrent_flags_t override_web_seeds = 12_bit;
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// if this flag is set (which it is by default) the torrent will be
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// considered needing to save its resume data immediately as it's
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// added. New torrents that don't have any resume data should do that.
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// This flag is cleared by a successful call to save_resume_data()
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constexpr torrent_flags_t need_save_resume = 13_bit;
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#if TORRENT_ABI_VERSION == 1
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// indicates that this torrent should never be unloaded from RAM, even
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// if unloading torrents are allowed in general. Setting this makes
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// the torrent exempt from loading/unloading management.
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constexpr torrent_flags_t TORRENT_DEPRECATED_MEMBER pinned = 14_bit;
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// If ``override_resume_data`` is set, flags set for this torrent
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// in this ``add_torrent_params`` object will take precedence over
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// whatever states are saved in the resume data. For instance, the
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// ``paused``, ``auto_managed``, ``sequential_download``, ``seed_mode``,
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// ``super_seeding``, ``max_uploads``, ``max_connections``,
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// ``upload_limit`` and ``download_limit`` are all affected by this
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// flag. The intention of this flag is to have any field in
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// add_torrent_params configuring the torrent override the corresponding
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// configuration from the resume file, with the one exception of save
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// resume data, which has its own flag (for historic reasons).
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// "file_priorities" and "save_path" are not affected by this flag.
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constexpr torrent_flags_t TORRENT_DEPRECATED_MEMBER override_resume_data = 15_bit;
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// defaults to on and specifies whether tracker URLs loaded from
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// resume data should be added to the trackers in the torrent or
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// replace the trackers. When replacing trackers (i.e. this flag is not
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// set), any trackers passed in via add_torrent_params are also
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// replaced by any trackers in the resume data. The default behavior is
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// to have the resume data override the .torrent file _and_ the
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// trackers added in add_torrent_params.
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constexpr torrent_flags_t TORRENT_DEPRECATED_MEMBER merge_resume_trackers = 16_bit;
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// if this flag is set, the save path from the resume data file, if
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// present, is honored. This defaults to not being set, in which
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// case the save_path specified in add_torrent_params is always used.
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constexpr torrent_flags_t TORRENT_DEPRECATED_MEMBER use_resume_save_path = 17_bit;
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// defaults to on and specifies whether web seed URLs loaded from
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// resume data should be added to the ones in the torrent file or
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// replace them. No distinction is made between the two different kinds
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// of web seeds (`BEP 17`_ and `BEP 19`_). When replacing web seeds
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// (i.e. when this flag is not set), any web seeds passed in via
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// add_torrent_params are also replaced. The default behavior is to
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// have any web seeds in the resume data take precedence over whatever
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// is passed in here as well as the .torrent file.
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constexpr torrent_flags_t TORRENT_DEPRECATED_MEMBER merge_resume_http_seeds = 18_bit;
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#endif
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// set this flag to disable DHT for this torrent. This lets you have the DHT
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// enabled for the whole client, and still have specific torrents not
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// participating in it. i.e. not announcing to the DHT nor picking up peers
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// from it.
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constexpr torrent_flags_t disable_dht = 19_bit;
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// set this flag to disable local service discovery for this torrent.
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constexpr torrent_flags_t disable_lsd = 20_bit;
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// set this flag to disable peer exchange for this torrent.
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constexpr torrent_flags_t disable_pex = 21_bit;
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// all torrent flags combined. Can conveniently be used when creating masks
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// for flags
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constexpr torrent_flags_t all = torrent_flags_t::all();
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// internal
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constexpr torrent_flags_t default_flags =
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torrent_flags::update_subscribe
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| torrent_flags::auto_managed
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| torrent_flags::paused
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| torrent_flags::apply_ip_filter
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| torrent_flags::need_save_resume
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#if TORRENT_ABI_VERSION == 1
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| torrent_flags::pinned
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| torrent_flags::merge_resume_http_seeds
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| torrent_flags::merge_resume_trackers
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#endif
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;
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#if TORRENT_ABI_VERSION == 1
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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#endif
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} // torrent_flags
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} // libtorrent
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#endif
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