net/xmppclient_listener.lua

   1 -- Prosody IM v0.2
   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 = { stream_tag = "http://etherx.jabber.org/streams|stream", streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
  40
  41 function stream_callbacks.error(session, error, data)
  42         if error == "no-stream" then
  43                 session:close("invalid-namespace");
  44         else
  45                 session.log("debug", "Client XML parse error: %s", tostring(error));
  46                 session:close("xml-not-well-formed");
  47         end
  48 end
  49
  50 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), debug.traceback()); end
  51 function stream_callbacks.handlestanza(a, b)
  52         xpcall(function () core_process_stanza(a, b) end, handleerr);
  53 end
  54
  55 local sessions = {};
  56 local xmppclient = { default_port = 5222, default_mode = "*a" };
  57
  58 -- These are session methods --
  59
  60 local function session_reset_stream(session)
  61         -- Reset stream
  62                 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
  63                 session.parser = parser;
  64
  65                 session.notopen = true;
  66
  67                 function session.data(conn, data)
  68                         local ok, err = parser:parse(data);
  69                         if ok then return; end
  70                         session:close("xml-not-well-formed");
  71                 end
  72
  73                 return true;
  74 end
  75
  76
  77 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  78 local function session_close(session, reason)
  79         local log = session.log or log;
  80         if session.conn then
  81                 if reason then
  82                         if type(reason) == "string" then -- assume stream error
  83                                 log("info", "Disconnecting client, <stream:error> is: %s", reason);
  84                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  85                         elseif type(reason) == "table" then
  86                                 if reason.condition then
  87                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  88                                         if reason.text then
  89                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  90                                         end
  91                                         if reason.extra then
  92                                                 stanza:add_child(reason.extra);
  93                                         end
  94                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
  95                                         session.send(stanza);
  96                                 elseif reason.name then -- a stanza
  97                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
  98                                         session.send(reason);
  99                                 end
 100                         end
 101                 end
 102                 session.send("</stream:stream>");
 103                 session.conn.close();
 104                 xmppclient.disconnect(session.conn, "stream error");
 105         end
 106 end
 107
 108
 109 -- End of session methods --
 110
 111 function xmppclient.listener(conn, data)
 112         local session = sessions[conn];
 113         if not session then
 114                 session = sm_new_session(conn);
 115                 sessions[conn] = session;
 116
 117                 -- Logging functions --
 118
 119                 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
 120                 session.log = logger.init(conn_name);
 121
 122                 session.log("info", "Client connected");
 123
 124                 session.reset_stream = session_reset_stream;
 125                 session.close = session_close;
 126
 127                 session_reset_stream(session); -- Initialise, ready for use
 128
 129                 session.dispatch_stanza = stream_callbacks.handlestanza;
 130         end
 131         if data then
 132                 session.data(conn, data);
 133         end
 134 end
 135
 136 function xmppclient.disconnect(conn, err)
 137         local session = sessions[conn];
 138         if session then
 139                 (session.log or log)("info", "Client disconnected: %s", err);
 140                 sm_destroy_session(session);
 141                 sessions[conn]  = nil;
 142                 session = nil;
 143                 collectgarbage("collect");
 144         end
 145 end
 146
 147 connlisteners_register("xmppclient", xmppclient);