net/xmppclient_listener.lua

   1 -- Prosody IM v0.3
   2 -- Copyright (C) 2008 Matthew Wild
   3 -- Copyright (C) 2008 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9
  10
  11 local logger = require "logger";
  12 local lxp = require "lxp"
  13 local init_xmlhandlers = require "core.xmlhandlers"
  14 local sm_new_session = require "core.sessionmanager".new_session;
  15
  16 local connlisteners_register = require "net.connlisteners".register;
  17
  18 local t_insert = table.insert;
  19 local t_concat = table.concat;
  20 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
  21 local m_random = math.random;
  22 local format = string.format;
  23 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session");
  24 local sm_streamopened = sessionmanager.streamopened;
  25 local sm_streamclosed = sessionmanager.streamclosed;
  26 local st = stanza;
  27
  28 local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
  29
  30 function stream_callbacks.error(session, error, data)
  31         if error == "no-stream" then
  32                 session:close("invalid-namespace");
  33         else
  34                 session.log("debug", "Client XML parse error: %s", tostring(error));
  35                 session:close("xml-not-well-formed");
  36         end
  37 end
  38
  39 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), debug.traceback()); end
  40 function stream_callbacks.handlestanza(a, b)
  41         xpcall(function () core_process_stanza(a, b) end, handleerr);
  42 end
  43
  44 local sessions = {};
  45 local xmppclient = { default_port = 5222, default_mode = "*a" };
  46
  47 -- These are session methods --
  48
  49 local function session_reset_stream(session)
  50         -- Reset stream
  51                 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
  52                 session.parser = parser;
  53
  54                 session.notopen = true;
  55
  56                 function session.data(conn, data)
  57                         local ok, err = parser:parse(data);
  58                         if ok then return; end
  59                         session:close("xml-not-well-formed");
  60                 end
  61
  62                 return true;
  63 end
  64
  65
  66 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  67 local function session_close(session, reason)
  68         local log = session.log or log;
  69         if session.conn then
  70                 if reason then
  71                         if type(reason) == "string" then -- assume stream error
  72                                 log("info", "Disconnecting client, <stream:error> is: %s", reason);
  73                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  74                         elseif type(reason) == "table" then
  75                                 if reason.condition then
  76                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  77                                         if reason.text then
  78                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  79                                         end
  80                                         if reason.extra then
  81                                                 stanza:add_child(reason.extra);
  82                                         end
  83                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
  84                                         session.send(stanza);
  85                                 elseif reason.name then -- a stanza
  86                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
  87                                         session.send(reason);
  88                                 end
  89                         end
  90                 end
  91                 session.send("</stream:stream>");
  92                 session.conn.close();
  93                 xmppclient.disconnect(session.conn, "stream error");
  94         end
  95 end
  96
  97
  98 -- End of session methods --
  99
 100 function xmppclient.listener(conn, data)
 101         local session = sessions[conn];
 102         if not session then
 103                 session = sm_new_session(conn);
 104                 sessions[conn] = session;
 105
 106                 -- Logging functions --
 107
 108                 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
 109                 session.log = logger.init(conn_name);
 110
 111                 session.log("info", "Client connected");
 112
 113                 session.reset_stream = session_reset_stream;
 114                 session.close = session_close;
 115
 116                 session_reset_stream(session); -- Initialise, ready for use
 117
 118                 session.dispatch_stanza = stream_callbacks.handlestanza;
 119         end
 120         if data then
 121                 session.data(conn, data);
 122         end
 123 end
 124
 125 function xmppclient.disconnect(conn, err)
 126         local session = sessions[conn];
 127         if session then
 128                 (session.log or log)("info", "Client disconnected: %s", err);
 129                 sm_destroy_session(session);
 130                 sessions[conn]  = nil;
 131                 session = nil;
 132                 collectgarbage("collect");
 133         end
 134 end
 135
 136 connlisteners_register("xmppclient", xmppclient);