libtorrent

• fix issue in udp_socket with unusual socket failure
• split progress_notification alert category into file-, piece- and block progress
• utp close-reason fix
• exposed default add_torrent_params flags to python bindings
• fix redundant flushes of partfile metadata
• add option to ignore min-interval from trackers on force-reannounce
• raise default setting for active_limit
• fall back to copy+remove if rename_file fails
• improve handling of filesystems not supporting fallocate()
• force-proxy no longer disables DHT
• improve connect-boost feature, to make new torrents quickly connect peers

• save both file and piece priorities in resume file
• added missing stats_metric python binding
• uTP connections are no longer exempt from rate limits by default
• fix exporting files from partfile while seeding
• fix potential deadlock on Windows, caused by performing restricted
  tasks from within DllMain
• fix issue when subsequent file priority updates cause torrent to stop

• coalesce reads and writes by default on windows
• fixed disk I/O performance of checking hashes and creating torrents
• fix race condition in part_file
• fix part_file open mode compatibility test
• fixed race condition in random number generator
• fix race condition in stat_cache (disk storage)
• improve error handling of failing to change file priority
  The API for custom storage implementations was altered
• set the hidden attribute when creating the part file
• fix tracker announces reporting more data downloaded than the size of the torrent
• fix recent regression with force_proxy setting

• don't perform DNS lookups for the DHT bootstrap unless DHT is enabled
• fix issue where setting file/piece priority would stop checking
• expose post_dht_stats() to python binding
• fix backwards compatibility to downloads without partfiles
• improve part-file related error messages
• fix reporting &redundant= in tracker announces
• fix tie-break in duplicate peer connection disconnect logic
• fix issue with SSL tracker connections left in CLOSE_WAIT state
• defer truncating existing files until the first time we write to them
• fix issue when receiving a torrent with 0-sized padfiles as magnet link
• fix issue resuming 1.0.x downloads with a file priority 0
• fix torrent_status::next_announce
• fix pad-file scalability issue
• made coalesce_reads/coalesce_writes settings take effect on linux and windows
• use unique peer_ids per connection
• fix iOS build on recent SDK
• fix tracker connection bind issue for IPv6 trackers
• fix error handling of some merkle torrents
• fix error handling of unsupported hard-links

Release 1.1.6

• deprecate save_encryption_settings (they are part of the normal settings)
• add getters for peer_class_filter and peer_class_type_filter
• make torrent_handler::set_priority() to use peer_classes
• fix support for boost-1.66 (requires C++11)
• fix i2p support
• fix loading resume data when in seed mode
• fix part-file creation race condition
• fix issue with initializing settings on session construction
• fix issue with receiving interested before metadata
• fix IPv6 tracker announce issue
• restore path sanitization behavior of ":"
• fix listen socket issue when disabling "force_proxy" mode
• fix full allocation failure on APFS

Release 1.1.5

• fix infinite loop when parsing certain invalid magnet links
• fix parsing of torrents with certain invalid filenames
• fix leak of torrent_peer objecs (entries in peer_list)
• fix leak of peer_class objects (when setting per-torrent rate limits)
• expose peer_class API to python binding
• fix integer overflow in whole_pieces_threshold logic
• fix uTP path MTU discovery issue on windows (DF bit was not set correctly)
• fix python binding for torrent_handle, to be hashable
• fix IPv6 tracker support by performing the second announce in more cases
• fix utf-8 encoding check in torrent parser
• fix infinite loop when parsing maliciously crafted torrents
• fix invalid read in parse_int in bdecoder
• fix issue with very long tracker- and web seed URLs
• don't attempt to create empty files on startup, if they already exist
• fix force-recheck issue (new files would not be picked up)
• fix inconsistency in file_priorities and override_resume_data behavior
• fix paused torrents not generating a state update when their ul/dl rate
  transitions to zero

1.1.4 release

• corrected missing const qualifiers on bdecode_node
• fix changing queue position of paused torrents (1.1.3 regression)
• fix re-check issue after move_storage
• handle invalid arguments to set_piece_deadline()
• move_storage did not work for torrents without metadata
• improve shutdown time by only announcing to trackers whose IP we know
• fix python3 portability issue in python binding
• delay 5 seconds before reconnecting socks5 proxy for UDP ASSOCIATE
• fix NAT-PMP crash when removing a mapping at the wrong time
• improve path sanitization (filter unicode text direction characters)
• deprecate partial_piece_info::piece_state
• bind upnp requests to correct local address
• save resume data when removing web seeds
• fix proxying of https connections
• fix race condition in disk I/O storage class
• fix http connection timeout on multi-homed hosts
• removed depdendency on boost::uintptr_t for better compatibility
• fix memory leak in the disk cache
• fix double free in disk cache
• forward declaring libtorrent types is discouraged. a new fwd.hpp header is provided

Changes since previous release

• removed (broken) support for incoming connections over socks5
• restore announce_entry's timestamp fields to posix time in python binding
• deprecate torrent_added_alert (in favor of add_torrent_alert)
• fix python binding for parse_magnet_uri
• fix minor robustness issue in DHT bootstrap logic
• fix issue where torrent_status::num_seeds could be negative
• document deprecation of dynamic loading/unloading of torrents
• include user-agent in tracker announces in anonymous_mode for private torrents
• add support for IPv6 peers from udp trackers
• correctly URL encode the IPv6 argument to trackers
• fix default file pool size on windows
• fix bug where settings_pack::file_pool_size setting was not being honored
• add feature to periodically close files (to make windows clear disk cache)
• fix bug in torrent_handle::file_status
• fix issue with peers not updated on metadata from magnet links

1.1.2 release

* default TOS marking to 0x20
* fix invalid access when leaving seed-mode with outstanding hash jobs
* fix ABI compatibility issue introduced with preformatted entry type
* add web_seed_name_lookup_retry to session_settings
* slightly improve proxy settings backwards compatibility
* add function to get default settings
* updating super seeding would include the torrent in state_update_alert
* fix issue where num_seeds could be greater than num_peers in torrent_status
* finished non-seed torrents can also be in super-seeding mode
* fix issue related to unloading torrents
* fixed finished-time calculation
* add missing min_memory_usage() and high_performance_seed() settings presets to python
* fix stat cache issue that sometimes would produce incorrect resume data
* storage optimization to peer classes
* fix torrent name in alerts of builds with deprecated functions
* make torrent_info::is_valid() return false if torrent failed to load
* fix per-torrent rate limits for >256 peer classes
* don't load user_agent and peer_fingerprint from session_state
* fix file rename issue with name prefix matching torrent name
* fix division by zero when setting tick_interval > 1000
* fix move_storage() to its own directory (would delete the files)
* fix socks5 support for UDP
* add setting urlseed_max_request_bytes to handle large web seed requests
* fix python build with CC/CXX environment
* add trackers from add_torrent_params/magnet links to separate tiers
* fix resumedata check issue with files with priority 0
* deprecated mmap_cache feature
* add utility function for generating peer ID fingerprint
* fix bug in last-seen-complete
* remove file size limit in torrent_info filename constructor
* fix tail-padding for last file in create_torrent
* don't send user-agent in metadata http downloads or UPnP requests when
  in anonymous mode
* fix internal resolve links lookup for mutable torrents
* hint DHT bootstrap nodes of actual bootstrap request

Fixes since 1.0.10

* updating super seeding would include the torrent in state_update_alert
* finished non-seed torrents can also be in super-seeding mode
* make torrent_info::is_valid() return false if torrent failed to load
* fix torrent_status time_since_upload/download counters for paused torrents
* fix bug in last-seen-complete
* fix DHT announce stall when adding torrent immediately after startup
* fix bug in enumeration of network interfaces on windows
* fix padfile issue
* fix PMTUd bug
* update puff to fix gzip crash

1.0.10 release

• fixed inverted priority of incoming piece suggestions
• fixed crash on invalid input in http_parser
• added a new "preformatted" type to bencode entry variant type
• fix division by zero in super-seeding logic

1.1.1 release

• update puff.c for gzip inflation
• add dht_bootstrap_node a setting in settings_pack (and add default)
• make pad-file and symlink support conform to BEP47
• fix piece picker bug that could result in division by zero
• fix value of current_tracker when all tracker failed
• deprecate lt_trackers extension
• remove load_asnum_db and load_country_db from python bindings
• fix crash in session::get_ip_filter when not having set one
• fix filename escaping when repairing torrents with broken web seeds
• fix bug where file_completed_alert would not be posted unless file_progress
  had been queries by the client
• move files one-by-one when moving storage for a torrent
• fix bug in enum_net() for BSD and Mac
• fix bug in python binding of announce_entry
• fixed bug related to flag_merge_resume_http_seeds flag in add_torrent_params
• fixed inverted priority of incoming piece suggestions
• optimize allow-fast logic
• fix issue where FAST extension messages were not used during handshake
• fixed crash on invalid input in http_parser
• upgraded to libtommath 1.0
• fixed parsing of IPv6 endpoint with invalid port character separator
• added limited support for new x.pe parameter from BEP 9
• fixed dht stats counters that weren't being updated
• make sure add_torrent_alert is always posted before other alerts for
  the torrent
• fixed peer-class leak when settings per-torrent rate limits
• added a new "preformatted" type to bencode entry variant type
• improved Socks5 support and test coverage
• fix set_settings in python binding
• Added missing alert categories in python binding
• Added dht_get_peers_reply_alert alert in python binding
• fixed updating the node id reported to peers after changing IPs

1.1.0 release

• improve robustness and performance of uTP PMTU discovery
• fix duplicate ACK issue in uTP
• support filtering which parts of session state are loaded by load_state()
• deprecate support for adding torrents by HTTP URL
• allow specifying which tracker to scrape in scrape_tracker
• tracker response alerts from user initiated announces/scrapes are now
  posted regardless of alert mask
• improve DHT performance when changing external IP (primarily affects
  bootstrapping).
• add feature to stop torrents immediately after checking files is done
• make all non-auto managed torrents exempt from queuing logic, including
  checking torrents.
• add option to not proxy tracker connections through proxy
• removed sparse-regions feature
• support using 0 disk threads (to perform disk I/O in network thread)
• removed deprecated handle_alert template
• enable logging build config by default (but alert mask disabled by default)
• deprecated RSS API
• experimental support for BEP 38, "mutable torrents"
• replaced lazy_bdecode with a new bdecoder that's a lot more efficient
• deprecate time functions, expose typedefs of boost::chrono in the
  libtorrent namespace instead
• deprecate file_base feature in file_storage/torrent_info
• improve piece picker support for reverse picking (used for snubbed peers)
  to not cause priority inversion for regular peers
• improve piece picker to better support torrents with very large pieces
  and web seeds. (request large contiguous ranges, but not necessarily a
  whole piece).
• deprecated session_status and session::status() in favor of performance
  counters.
• improve support for HTTP where one direction of the socket is shut down.
• remove internal fields from web_seed_entry
• separate crypto library configuration and whether to support
  bittorrent protocol encryption
• simplify bittorrent protocol encryption by just using internal RC4
  implementation.
• optimize copying torrent_info and file_storage objects
• cancel non-critical DNS lookups when shutting down, to cut down on
  shutdown delay.
• greatly simplify the debug logging infrastructure. logs are now delivered
  as alerts, and log level is controlled by the alert mask.
• removed auto_expand_choker. use rate_based_choker instead
• optimize UDP tracker packet handling
• support SSL over uTP connections
• support web seeds that resolve to multiple IPs
• added auto-sequential feature. download well-seeded torrents in-order
• removed built-in GeoIP support (this functionality is orthogonal to
  libtorrent)
• deprecate proxy settings in favor of regular settings
• deprecate separate settings for peer protocol encryption
• support specifying listen interfaces and outgoing interfaces as device
  names (eth0, en2, tun0 etc.)
• support for using purgrable memory as disk cache on Mac OS.
• be more aggressive in corking sockets, to coalesce messages into larger
  packets.
• pre-emptively unchoke peers to save one round-trip at connection start-up.
• add session constructor overload that takes a settings_pack
• torrent_info is no longer an intrusive_ptr type. It is held by shared_ptr.
  This is a non-backwards compatible change
• move listen interface and port to the settings
• move use_interfaces() to be a setting
• extend storage interface to allow deferred flushing and flush the part-file
  metadata periodically
• make statistics propagate instantly rather than on the second tick
• support for partfiles, where partial pieces belonging to skipped files are
  put
• support using multiple threads for socket operations (especially useful for
  high performance SSL connections)
• allow setting rate limits for arbitrary peer groups. Generalizes
  per-torrent rate limits, and local peer limits
• improved disk cache complexity O(1) instead of O(log(n))
• add feature to allow storing disk cache blocks in an mmapped file
  (presumably on an SSD)
• optimize peer connection distribution logic across torrents to scale
  better with many torrents
• replaced std::map with boost::unordered_map for torrent list, to scale
  better with many torrents
• optimized piece picker
• optimized disk cache
• optimized .torrent file parsing
• optimized initialization of storage when adding a torrent
• added support for adding torrents asynchronously (for improved startup
  performance)
• added support for asynchronous disk I/O
• almost completely changed the storage interface (for custom storage)
• added support for hashing pieces in multiple threads
• fix division by zero in super-seeding logic

• fix issue in checking outgoing interfaces (when that option is enabled)
• python binding fix for boost-1.60.0
• optimize enumeration of network interfaces on windows
• improve reliability of binding listen sockets
• support SNI in https web seeds and trackers
• fix unhandled exception in DHT when receiving a DHT packet over IPv6

• fix web seed request size
• fix bug where web seeds were not used for torrents added by URL
• fix support for symlinks on windows
• fix long filename issue (on unixes)
• fixed performance bug in DHT torrent eviction
• fixed win64 build (GetFileAttributesEx)
• fixed bug when deleting files for magnet links before they had metadata

1.0.7 release

* fix bug where loading settings via load_state() would not trigger all
  appropriate actions
* fix bug where 32 bit builds could use more disk cache than the virtual
  address space (when set to automatic)
* fix support for torrents with > 500'000 pieces
* fix ip filter bug when banning peers
* fix IPv6 IP address resolution in URLs
* introduce run-time check for torrent info-sections beeing too large
* fix web seed bug when using proxy and proxy-peer-connections=false
* fix bug in magnet link parser
* introduce add_torrent_params flags to merge web seeds with resume data
  (similar to trackers)
* fix bug where dont_count_slow_torrents could not be disabled
* fix fallocate hack on linux (fixes corruption on some architectures)
* fix auto-manage bug with announce to tracker/lsd/dht limits
* improve DHT routing table to not create an unbalanced tree
* fix bug in uTP that would cause any connection taking more than one second
  to connect be timed out (introduced in the vulnerability path)
* fixed falling back to sending UDP packets direct when socks proxy fails
* fixed total_wanted bug (when setting file priorities in add_torrent_params)
* fix python3 compatibility with sha1_hash

* fixed uTP vulnerability
* make utf8 conversions more lenient
* fix loading of piece priorities from resume data
* improved seed-mode handling (seed-mode will now automatically be left when
  performing operations implying it's not a seed)
* fixed issue with file priorities and override resume data
* fix request queue size performance issue
* slightly improve UDP tracker performance
* fix http scrapes
* add missing port mapping functions to python binding
* fix bound-checking issue in bdecoder
* expose missing dht_settings fields to python
* add function to query the DHT settings
* fix bug in 'dont_count_slow_torrents' feature, which would start too many
  torrents