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authorFlorent Le Coz <louiz@louiz.org>2014-02-17 03:07:27 +0100
committerFlorent Le Coz <louiz@louiz.org>2014-02-17 03:07:27 +0100
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-BIBOUMI 1 "2014-02-17"
-======================
-
-NAME
-----
-
-biboumi - XMPP gateway to IRC
-
-SYNOPSIS
---------
-
-`biboumi` [`config_filename`]
-
-DESCRIPTION
------------
-
-Biboumi is an XMPP gateway that connects to IRC servers and translates
-between the two protocols. It can be used to access IRC channels using any
-XMPP client as if these channels were XMPP MUCs.
-
-OPTIONS
--------
-
-Available options:
-
-`config_filename`
-
- Specify the file to read for configuration. See *CONFIG* section for more
- details on its content.
-
-CONFIG
-------
-
-The configuration file uses a simple format of the form
-`"option=value"`. Here is a description of each possible option:
-
-`hostname` (mandatory)
-
- The hostname served by the XMPP gateway. This domain must be configured in
- the XMPP server as an external component. See the manual for your XMPP
- server for more information.
-
-`password` (mandatory)
-
- The password used to authenticate the XMPP component to your XMPP server.
- This password must be configured in the XMPP server, associated with the
- external component on *hostname*.
-
-`log_file`
-
- A filename into which logs are written. If none is provided, the logs are
- written on standard output
-
-`log_level`
-
- Indicate what type of log messages to write in the logs. Values can be
- from 0 to 3. 0 is debug, 1 is info, 2 is warning, 3 is error. The
- default is 0, but a more practical value for production use is 1.
-
-USAGE
------
-
-When started, biboumi connects, without encryption (see *SECURITY*), to the
-local XMPP server on the port `5347` and provides the configured password to
-authenticate. Biboumi then serves the configured `hostname`, this means
-that all XMPP stanza with a `to` JID on that domain will be sent to biboumi,
-and biboumi will send only send messages coming from this hostname.
-
-When an user joins an IRC channel on an IRC server (see *Join an IRC
-channel*), biboumi connects to the remote IRC server, sets the user’s nick
-as requested, and then tries to join the specified channel. If the same
-user subsequently tries to connect to an other channel on the same server,
-the same IRC connection is used. If, however, an other user wants to join
-an IRC channel on that same IRC server, biboumi opens a new connection to
-that server. Biboumi connects once to each IRC server, for each user on it.
-
-To cleanly shutdown the component, send the SIGINT or SIGTERM signals to it.
-It will send messages to all connected IRC and XMPP servers to indicate a
-reason why the users are being disconnected. Biboumi exits when all
-connections are closed because the remote acknowledged the end of
-communication. If the remote server does not respond, biboumi does not
-exit, unless SIGINT or SIGTERM is received again, in which case biboumi
-closes the TCP connections and exits immediately.
-
-### Addressing
-
-IRC entities are represented by XMPP JIDs. The domain part of the JID is
-the domain served by biboumi, and the local part depends on the concerned
-entity.
-
-IRC channels and IRC users JIDs have a localpart formed like this:
-`name`, the `'%'` separator and the `irc_server`.
-
-For an IRC channel, the name starts with `'&'`, `'#'`, `'+'`
-or `'!'`. Some other gateway implementations, as well as some IRC
-clients, do not require them to be started by one of these characters,
-adding an implicit `'#'` in that case. Biboumi does not do that because
-this gets confusing when trying to understand the difference between
-*foo*, *#foo*, and *##foo*.
-
-If the name starts with any other character, this represents an IRC user.
-If compiled with Libidn, an IRC user has a bare JID representing the
-“hostname” provided by the IRC server.
-
-### Join an IRC channel
-
-To join an IRC channel `#foo` on the IRC server `irc.example.com`,
-join the XMPP MUC `#foo%irc.example.com@hostname`.
-
-### Channel messages
-
-On XMPP, unlike on IRC, the displayed order of the messages is the same for
-all participants of a MUC. Biboumi can not however provide this feature, as
-it cannot know whether the IRC server has received and forwarded the
-messages to other users. This means that the order of the messages
-displayed in your XMPP may not be the same than the order on other IRC
-users’.
-
-### Nicknames
-
-On IRC, nicknames are server-wide. This means that one user only has one
-single nickname at one given time on all the channels of a server. This is
-different from XMPP where an user can have a different nick on each MUC,
-even if these MUCs are on the same server.
-
-This means that the nick you choose when joining your first IRC channel on a
-given IRC server will be your nickname in all other channels that you join
-on that same IRC server.
-If you explicitely change your nickname on one channel, your nickname will
-be changed on all channels on the same server as well.
-
-### Private messages
-
-Private messages are handled differently on IRC and on XMPP. On IRC, you
-talk directly to one server-user: toto on the channel #foo is the same user
-as toto on the channel #bar (as long as these two channels are on the same
-IRC server). Using biboumi, there is no way to receive a message from a
-room participant (from a jid like #test%irc.example.com/nickname). Instead,
-private messages are received from and sent to the user (using a jid like
-nickname%irc.example.com). For conveniance and compatibility with XMPP
-clients sending private messages to the MUC participants, a message sent to
-#chan%irc.example.com@irc.example.net/Nickname will be redirected to
-Nickname%irc.example.com@irc.example.net, although this is not the prefered
-way to do it.
-
-### Notices
-
-Notices are received exactly like private messages. It is not possible to
-send a notice.
-
-### Kicks and bans
-
-Kicks are transparently translated from one protocol to another. However
-banning an XMPP participant has no effect. To ban an user you need to set a
-mode +b on that user nick or host (see *MODES*) and then kick it.
-
-### Encoding
-
-On XMPP, the encoding is always `UTF-8`, whereas on IRC the encoding of
-each message can be anything.
-
-This means that biboumi has to convert everything coming from IRC into UTF-8
-without knowing the encoding of the received messages. To do so, it checks
-if each message is UTF-8 valid, if not it tries to convert from
-`iso_8859-1` (because this appears to be the most common case, at least
-on the channels I visit) to `UTF-8`. If that conversion fails at some
-point, a placeholder character `'�'` is inserted to indicate this
-decoding error.
-
-Messages are always sent in UTF-8 over IRC, no conversion is done in that
-direction.
-
-### IRC modes
-
-One feature that doesn’t exist on XMPP but does on IRC is the `modes`.
-Although some of these modes have a correspondance in the XMPP world (for
-example the `+o` mode on an user corresponds to the `moderator` role
-in XMPP), it is impossible to map all these modes to an XMPP feature. To
-circumvent this problem, biboumi provides a raw notification when modes are
-changed, and lets the user change the modes directly.
-
-To change modes, simply send a message starting with “`/mode`” followed by
-the modes and the arguments you want to send to the IRC server. For example
-“/mode +aho louiz”. Note that your XMPP client may interprete messages
-begining with “/” like a command. To actually send a message starting with
-a slash, you may need to start your message with “//mode” or “/say /mode”,
-depending on your client.
-
-When a mode is changed, the user is notified by a message coming from the
-MUC bare JID, looking like “Mode #foo [+ov] [toto tutu]”. In addition, if
-the mode change can be translated to an XMPP feature, the user will be
-notified of this XMPP event as well. For example if a mode “+o toto” is
-received, then toto’s role will be changed to moderator. The mapping
-between IRC modes and XMPP features is as follow:
-
-`+q`
-
- Sets the participant’s role to `moderator` and its affiliation to `owner`.
-
-`+a`
-
- Sets the participant’s role to `moderator` and its affiliation to `owner`.
-
-`+o`
-
- Sets the participant’s role to `moderator` and its affiliation to `admin`.
-
-`+h`
-
- Sets the participant’s role to `moderator` and its affiliation to `member`.
-
-`+v`
-
- Sets the participant’s role to `participant` and its affiliation to `member`.
-
-SECURITY
---------
-
-Biboumi does not provide any encryption mechanism: connection to the XMPP
-server MUST be made on localhost. The XMPP server is not supposed to accept
-non-local connection from components, thus encryption is useless. IRC
-SSL/TLS is also not yet implemented.
-
-Biboumi also does not check if received JIDs are properly formatted using
-nodeprep. This must be done by the XMPP server to which biboumi is directly
-connected.
-
-AUTHORS
--------
-
-This software and man page are both written by Florent Le Coz.
-
-LICENSE
--------
-
-Biboumi is released under the zlib license.