XDCC

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XDCC (Xabi DCC or eXtended DCC) was initially a script written in 1994 for ircII by Xabi. This script extends the ircII DCC command.

Now XDCC refers to IRC bots running file sharing programs. XDCC bots serve one or more usually large files for download using the DCC protocol. Though it is widely understood to be a protocol by which illegal content, usually ISOs, (S)VCDs, Xvid and pornography files can be listed and subsequently downloaded, it is also used in the legal sense. Some XDCC servers may run on hacked computers.

Frequently, FXP groups utilise connections with large upstream bandwidth (e.g. those of educational institutes, Asian fiber-optic customers and web hosting companies) around the world in order to mass distribute warez releases (usually multimedia files and software).

XDCC is quickly gaining popularity over older methods of software piracy such as newsgroups and fserve. Unlike peer-to-peer transfers, XDCC is often hosted on connections with very high upstream bandwidth, the most popular dumps (server computer with high amounts of pirated software) are usually connected to sites with 100 Mbit (or more) connections. Oftentimes FTP servers are also running on the XDCC servers to facilitate uploading of materials to them.

To use XDCC, one can send a private message (query) or send a CTCP command to a bot, using an IRC client. The user can ask a bot what files it has by private messaging "xdcc list" to the bot. However, this feature is often disabled as to not attract too much attention. When a user wants to download a packet or file from a bot, the user would type something such as "xdcc send #<number of packet>" to the bot. The bot will either start sending the user the packet or the bot will place the user in a queue, and force the user to wait their turn.

[edit] Common (Iroffer) XDCC Commands

/msg <botname> xdcc send #<number of packet> (Requests a pack number from the bot.)
/ctcp <botname> xdcc send <number of packet> (If the above is disabled.)
/msg <botname> xdcc list (Requests a list of packs available from the bot.)
/ctcp <botname> xdcc list (If the above is disabled.)
/msg <botname> xdcc remove (This only works via msg.)