introduction

libtorrent is a C++ library that aims to be a good alternative to all the other bittorrent implementations around. It is a library and not a full featured client, although it comes with a working example client.

The main goals of libtorrent are:

• to be cpu efficient
• to be memory efficient
• to be very easy to use

features

libtorrent is still being developed, however it is stable. It is an ongoing project (including this documentation). The current state includes the following features:

• trackerless torrents (using the Mainline kademlia DHT protocol) with some DHT extensions.
• support for IPv6
• NAT-PMP and UPnP support (automatic port mapping on routers that supports it)
• piece-wise, unordered, incremental file allocation
• uses separate threads for checking files and for main downloader, with a fool-proof thread-safe library interface. (i.e. There's no way for the user to cause a deadlock). (see threads)
• adjusts the length of the request queue depending on download rate.
• multitracker extension support (as specified by John Hoffman)
• supports files > 2 gigabytes.
• serves multiple torrents on a single port and in a single thread
• fast resume support, a way to get rid of the costly piece check at the start of a resumed torrent. Saves the storage state, piece_picker state as well as all local peers in a separate fast-resume file.

• libtorrent manual

  Author:	Arvid Norberg, arvid@rasterbar.com

  Table of contents

  • introduction
  • features
  • portability
  • license

  introduction

  libtorrent is a C++ library that aims to be a good alternative to all the other bittorrent implementations around. It is a library and not a full featured client, although it comes with a working example client.

  The main goals of libtorrent are:

  • to be cpu efficient
  • to be memory efficient
  • to be very easy to use

  features

  libtorrent is still being developed, however it is stable. It is an ongoing project (including this documentation). The current state includes the following features:

  • trackerless torrents (using the Mainline kademlia DHT protocol) with some DHT extensions.
  • support for IPv6
  • NAT-PMP and UPnP support (automatic port mapping on routers that supports it)
  • piece-wise, unordered, incremental file allocation
  • uses separate threads for checking files and for main downloader, with a fool-proof thread-safe library interface. (i.e. There's no way for the user to cause a deadlock). (see threads)
  • adjusts the length of the request queue depending on download rate.
  • multitracker ex