net/xmppclient_listener.lua

   1 -- Prosody IM v0.1
   2 -- Copyright (C) 2008 Matthew Wild
   3 -- Copyright (C) 2008 Waqas Hussain
   4 --
   5 -- This program is free software; you can redistribute it and/or
   6 -- modify it under the terms of the GNU General Public License
   7 -- as published by the Free Software Foundation; either version 2
   8 -- of the License, or (at your option) any later version.
   9 --
  10 -- This program is distributed in the hope that it will be useful,
  11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 -- GNU General Public License for more details.
  14 --
  15 -- You should have received a copy of the GNU General Public License
  16 -- along with this program; if not, write to the Free Software
  17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 --
  19
  20
  21
  22 local logger = require "logger";
  23 local lxp = require "lxp"
  24 local init_xmlhandlers = require "core.xmlhandlers"
  25 local sm_new_session = require "core.sessionmanager".new_session;
  26
  27 local connlisteners_register = require "net.connlisteners".register;
  28
  29 local t_insert = table.insert;
  30 local t_concat = table.concat;
  31 local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end
  32 local m_random = math.random;
  33 local format = string.format;
  34 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session");
  35 local sm_streamopened = sessionmanager.streamopened;
  36 local sm_streamclosed = sessionmanager.streamclosed;
  37 local st = stanza;
  38
  39 local stream_callbacks = { streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
  40
  41 local sessions = {};
  42 local xmppclient = { default_port = 5222, default_mode = "*a" };
  43
  44 -- These are session methods --
  45
  46 local function session_reset_stream(session)
  47         -- Reset stream
  48                 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
  49                 session.parser = parser;
  50
  51                 session.notopen = true;
  52
  53                 function session.data(conn, data)
  54                         parser:parse(data);
  55                 end
  56                 return true;
  57 end
  58
  59
  60 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  61 local function session_close(session, reason)
  62         local log = session.log or log;
  63         if session.conn then
  64                 if reason then
  65                         if type(reason) == "string" then -- assume stream error
  66                                 log("info", "Disconnecting client, <stream:error> is: %s", reason);
  67                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  68                         elseif type(reason) == "table" then
  69                                 if reason.condition then
  70                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  71                                         if reason.text then
  72                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  73                                         end
  74                                         if reason.extra then
  75                                                 stanza:add_child(reason.extra);
  76                                         end
  77                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
  78                                         session.send(stanza);
  79                                 elseif reason.name then -- a stanza
  80                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
  81                                         session.send(reason);
  82                                 end
  83                         end
  84                 end
  85                 session.send("</stream:stream>");
  86                 session.conn.close();
  87                 xmppclient.disconnect(session.conn, "stream error");
  88         end
  89 end
  90
  91
  92 -- End of session methods --
  93
  94 function xmppclient.listener(conn, data)
  95         local session = sessions[conn];
  96         if not session then
  97                 session = sm_new_session(conn);
  98                 sessions[conn] = session;
  99
 100                 -- Logging functions --
 101
 102                 local mainlog, log = log;
 103                 do
 104                         local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
 105                         log = logger.init(conn_name);
 106                 end
 107                 local print = function (...) log("info", t_concatall({...}, "\t")); end
 108                 session.log = log;
 109
 110                 print("Client connected");
 111
 112                 session.reset_stream = session_reset_stream;
 113                 session.close = session_close;
 114
 115                 session_reset_stream(session); -- Initialise, ready for use
 116
 117                 -- TODO: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
 118                 -- this will avoid the useless indirection we have atm
 119                 -- (I'm on a mission, no time to fix now)
 120
 121                 -- Debug version --
 122                 --local function handleerr(err) print("Traceback:", err, debug.traceback()); end
 123                 --session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr));  end
 124
 125         end
 126         if data then
 127                 session.data(conn, data);
 128         end
 129 end
 130
 131 function xmppclient.disconnect(conn, err)
 132         local session = sessions[conn];
 133         if session then
 134                 (session.log or log)("info", "Client disconnected: %s", err);
 135                 sm_destroy_session(session);
 136                 sessions[conn]  = nil;
 137                 session = nil;
 138                 collectgarbage("collect");
 139         end
 140 end
 141
 142 connlisteners_register("xmppclient", xmppclient);