A major review and update of the DHT code was done to support this and also to add several other DHT protocol updates. ![]() To provide peers to dual-protocol torrents, it was necessary to modify the DHT engine to schedule separate search/announce procedures for each protocol ID-hash that a particular torrent requires. Rules can be customized for different hosts. Simultaneous connections can be globally limited based on host name, and other rate-limiting/throttling parameters can also be set. This is available from Settings > Transfers > Peers. Peak speeds are much higher and far less CPU usage is needed to maintain a continuous flow of data.įor better control over web seed connections, a brand-new Web Seed Request Limiter has also been created. Support for web seeds has been completely overhauled. The process for gathering meta-info from peers has also been greatly improved and is much faster when dealing with extremely large torrents. Unusual situations such as losing pieces, or going from complete state to incomplete state, are now handled with great precision. The peer connection selection and management algorithms have been completely replaced with much more modern versions that can efficiently handle multiple ports connected from the same IP, perform regular peer-ID duplicate detection, and prioritize connections based on their protocol and piece availability. This is sometimes required for situations where there are many v1-only clients in a swarm and v2 hash-info is not fully available, which, when following the specification as-written, prevents pieces from being available over the v2 connection. It was also necessary in hybrid swarms to allow dual connections so peers can communicate over v1 and v2 simultaneously. If managed correctly, this saves bandwidth, time, and memory, especially for extremely large torrents when only a few files are needed. The new implementation takes full advantage of the fact that when a transfer is only downloading a subset of files, the new v2 protocol allows clients to only download hash data for files that are needed. This was needed to accommodate the new v2 protocol messaging requirements, in particular the piece selection algorithms and file hash field synchronizing with other peers. The peer connection logic has been largely re-written with major improvements in several areas. This will be set into non-private transfers, upon loading, before applying the Individual Tracker Options. They are also accessible from the standard tracker-edit dialog, the transfer preload window, and the new seed creation dialog.Ī default preset for newly-loaded transfers can also be selected in the settings window. These presets can be set by simply right-clicking any transfer in the main window and using the Trackers sub-menu. Dual-protocol and dual-interface announcement is now fully supported for each individual tracker.Ī tracker presets feature has been added, which can be accessed from Settings > Transfers > Trackers. Combined version 1+2 torrents are also fully supported.Īll tracker function has been completely replaced with a newly-written implementation. However, there are also many other changes from the v1 protocol that required a major review and re-write of the torrent/peers/trackers/pieces core logic. The primary benefit of this is the use of the block-level SHA-2 hash function instead of SHA-1 at the piece level. There have been many changes throughout the program.Ī full BEP-52 implementation has been added to the program. Tixati version 3.11 has finally been released.
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