net/xmppclient_listener.lua

   1
   2 local logger = require "logger";
   3 local lxp = require "lxp"
   4 local init_xmlhandlers = require "core.xmlhandlers"
   5 local sm_new_session = require "core.sessionmanager".new_session;
   6
   7 local connlisteners_register = require "net.connlisteners".register;
   8
   9 local t_insert = table.insert;
  10 local t_concat = table.concat;
  11 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
  12 local m_random = math.random;
  13 local format = string.format;
  14 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session");
  15 local sm_streamopened = sessionmanager.streamopened;
  16 local sm_streamclosed = sessionmanager.streamclosed;
  17 local st = stanza;
  18
  19 local stream_callbacks = { streamopened = sm_streamopened, streamclosed = sm_streamclosed };
  20
  21 local sessions = {};
  22 local xmppclient = { default_port = 5222 };
  23
  24 -- These are session methods --
  25
  26 local function session_reset_stream(session)
  27         -- Reset stream
  28                 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
  29                 session.parser = parser;
  30
  31                 session.notopen = true;
  32
  33                 function session.data(conn, data)
  34                         parser:parse(data);
  35                 end
  36                 return true;
  37 end
  38
  39
  40 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  41 local function session_close(session, reason)
  42         local log = session.log or log;
  43         if session.conn then
  44                 if reason then
  45                         if type(reason) == "string" then -- assume stream error
  46                                 log("info", "Disconnecting client, <stream:error> is: %s", reason);
  47                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  48                         elseif type(reason) == "table" then
  49                                 if reason.condition then
  50                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  51                                         if reason.text then
  52                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  53                                         end
  54                                         if reason.extra then
  55                                                 stanza:add_child(reason.extra);
  56                                         end
  57                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
  58                                         session.send(stanza);
  59                                 elseif reason.name then -- a stanza
  60                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
  61                                         session.send(reason);
  62                                 end
  63                         end
  64                 end
  65                 session.send("</stream:stream>");
  66                 session.conn.close();
  67                 xmppclient.disconnect(session.conn, "stream error");
  68         end
  69 end
  70
  71
  72 -- End of session methods --
  73
  74 function xmppclient.listener(conn, data)
  75         local session = sessions[conn];
  76         if not session then
  77                 session = sm_new_session(conn);
  78                 sessions[conn] = session;
  79
  80                 -- Logging functions --
  81
  82                 local mainlog, log = log;
  83                 do
  84                         local conn_name = tostring(conn):match("[a-f0-9]+$");
  85                         log = logger.init(conn_name);
  86                 end
  87                 local print = function (...) log("info", t_concatall({...}, "\t")); end
  88                 session.log = log;
  89
  90                 print("Client connected");
  91
  92                 session.reset_stream = session_reset_stream;
  93                 session.close = session_close;
  94
  95                 session_reset_stream(session); -- Initialise, ready for use
  96
  97                 -- TODO: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
  98                 -- this will avoid the useless indirection we have atm
  99                 -- (I'm on a mission, no time to fix now)
 100
 101                 -- Debug version --
 102                 local function handleerr(err) print("Traceback:", err, debug.traceback()); end
 103                 session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr));  end
 104         end
 105         if data then
 106                 session.data(conn, data);
 107         end
 108 end
 109
 110 function xmppclient.disconnect(conn, err)
 111         local session = sessions[conn];
 112         if session then
 113                 (session.log or log)("info", "Client disconnected: %s", err);
 114                 sm_destroy_session(session);
 115                 sessions[conn]  = nil;
 116                 session = nil;
 117                 collectgarbage("collect");
 118         end
 119 end
 120
 121 connlisteners_register("xmppclient", xmppclient);