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author | Florent Le Coz <louiz@louiz.org> | 2013-11-27 00:43:37 +0100 |
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committer | Florent Le Coz <louiz@louiz.org> | 2013-11-28 01:18:26 +0100 |
commit | 3c5cdec1d11fc03899f7068279cf5430d274124c (patch) | |
tree | c158d2f89bf80b71cd9f94beecd40ca25039f0c3 /doc/biboumi.1 | |
parent | e6f20d3c0fd4ba8696a4410a366741c9b9f3562d (diff) | |
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Add some documentation
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diff --git a/doc/biboumi.1 b/doc/biboumi.1 new file mode 100644 index 0000000..c874062 --- /dev/null +++ b/doc/biboumi.1 @@ -0,0 +1,192 @@ +.TH biboumi 1 2013-11-21 +. +.SH NAME +. +\fBbiboumi\fR - XMPP gateway to IRC +. +.SH SYNOPSIS +. +\fBbiboumi\fR [\fIconfig_filename\fR] +. +.SH 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. +. +.SH OPTIONS +. +Available options: +.TP +\fBconfig_filename\fR +Specify the file to read for configuration. See \fBCONFIG\fR section for +more details on its content. +. +.SH CONFIG +. +The configuration file uses a simple format of the form +\fB"option=value"\fR. Here is a description of each possible option: +.TP +\fBhostname\fR (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. +.TP +\fBpassword\fR (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 \fBhostname\fR. +. +.SH USAGE +. +When started, biboumi connects, without encryption (see \fBSECURITY\fR), to +the local XMPP server on the port \fI5347\fR and provides the configured +password to authenticate. Biboumi then serves the configured +\fIhostname\fR, this means that all XMPP stanza with a \fIto\fR 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 \fBJoin an IRC +channel\fR), 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. +. +.SS "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: \fIname\fR, +the '\fI%\fR' separator and the \fIirc_server\fR. +. +For an IRC channel, the name starts with '\fI&\fR', '\fI#\fR', '\fI+\fR' +or '\fI!\fR'. 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 '\fI#\fR' in that case. Biboumi does not do that because +this gets confusing when trying to understand the difference between +\fIfoo\fR, \fI#foo\fR, and \fI##foo\fR. +. +If the name starts with any other character, this represents an IRC user. +. +.SS "Join an IRC channel" +. +To join an IRC channel \fI#foo\fR on the IRC server \fIirc.example.com\fR, +join the XMPP MUC \fI#foo%irc.example.com@hostname\fR. +. +.SS "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’. +. +.SS "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. +. +.SS "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 +than 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 \fI#test%irc.example.com/\fBnickname\fR). +Instead, private messages are received from and sent to the user (using a +jid like \fBnickname\fI%irc.example.com\fR). For conveniance and +compatibility with XMPP clients sending private messages to the MUC +participants, a message sent to +\fB#chan%irc.example.com@irc.example.net/Nickname\fR will be redirected to +\fBNickname%irc.example.com@irc.example.net\fR, although this is not the +prefered way to do it. +. +.SS "Notices" +. +Notices are received exactly like private messages. It is not possible to +send a notice. +. +.SS "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 \fBMODES\fR) and then kick it. +. +.SS "Encoding" +. +On XMPP, the encoding is always \fIUTF-8\fR, 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 +\fIiso_8859-1\fR (because this appears to be the most common case, at least +on the channels I visit) to \fIUTF-8\fR. If that conversion fails at some +point, a placeholder character '\f�\fR' is inserted to indicate this +decoding error. +. +Messages are always sent in UTF-8 over IRC, no conversion is done in that +direction. +. +.SS "IRC modes" +. +One feature that doesn’t exist on XMPP but does on IRC is the \fImodes\fR. +Although some of these modes have a correspondance in the XMPP world (for +example the \fI+o\fR mode on an user corresponds to the \fImoderator\fR 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 “\fB/mode\fR” 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 +inteprete 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: +. +.TP +.B +o +Sets the participant’s role to \fImoderator\fR. +. +.TP +.B +a +Sets the participant’s role to \admin\fR. +. +.TP +.B +v +Sets the participant’s affiliation to \fImember\fR. +. +.SH 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 implemented although this could be useful for some +users, this is however not a high priority feature. +. +Biboumi also does not check if JIDs are properly formatted using nodeprep. +This must be done by the XMPP server to which biboumi is directly connected. +. +.SH AUTHORS +. +Written by Florent Le Coz |