net/xmppclient_listener.lua

   1 -- Prosody IM v0.4
   2 -- Copyright (C) 2008-2009 Matthew Wild
   3 -- Copyright (C) 2008-2009 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",
  29                 default_ns = "jabber:client",
  30                 streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
  31
  32 function stream_callbacks.error(session, error, data)
  33         if error == "no-stream" then
  34                 session.log("debug", "Invalid opening stream header");
  35                 session:close("invalid-namespace");
  36         elseif session.close then
  37                 (session.log or log)("debug", "Client XML parse error: %s", tostring(error));
  38                 session:close("xml-not-well-formed");
  39         end
  40 end
  41
  42 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), debug.traceback()); end
  43 function stream_callbacks.handlestanza(a, b)
  44         xpcall(function () core_process_stanza(a, b) end, handleerr);
  45 end
  46
  47 local sessions = {};
  48 local xmppclient = { default_port = 5222, default_mode = "*a" };
  49
  50 -- These are session methods --
  51
  52 local function session_reset_stream(session)
  53         -- Reset stream
  54                 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
  55                 session.parser = parser;
  56
  57                 session.notopen = true;
  58
  59                 function session.data(conn, data)
  60                         local ok, err = parser:parse(data);
  61                         if ok then return; end
  62                         session:close("xml-not-well-formed");
  63                 end
  64
  65                 return true;
  66 end
  67
  68
  69 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  70 local function session_close(session, reason)
  71         local log = session.log or log;
  72         if session.conn then
  73                 if reason then
  74                         if type(reason) == "string" then -- assume stream error
  75                                 log("info", "Disconnecting client, <stream:error> is: %s", reason);
  76                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  77                         elseif type(reason) == "table" then
  78                                 if reason.condition then
  79                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  80                                         if reason.text then
  81                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  82                                         end
  83                                         if reason.extra then
  84                                                 stanza:add_child(reason.extra);
  85                                         end
  86                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
  87                                         session.send(stanza);
  88                                 elseif reason.name then -- a stanza
  89                                         log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
  90                                         session.send(reason);
  91                                 end
  92                         end
  93                 end
  94                 session.send("</stream:stream>");
  95                 session.conn.close();
  96                 xmppclient.disconnect(session.conn, "stream error");
  97         end
  98 end
  99
 100
 101 -- End of session methods --
 102
 103 function xmppclient.listener(conn, data)
 104         local session = sessions[conn];
 105         if not session then
 106                 session = sm_new_session(conn);
 107                 sessions[conn] = session;
 108
 109                 -- Logging functions --
 110
 111                 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
 112                 session.log = logger.init(conn_name);
 113
 114                 session.log("info", "Client connected");
 115
 116                 session.reset_stream = session_reset_stream;
 117                 session.close = session_close;
 118
 119                 session_reset_stream(session); -- Initialise, ready for use
 120
 121                 session.dispatch_stanza = stream_callbacks.handlestanza;
 122         end
 123         if data then
 124                 session.data(conn, data);
 125         end
 126 end
 127
 128 function xmppclient.disconnect(conn, err)
 129         local session = sessions[conn];
 130         if session then
 131                 (session.log or log)("info", "Client disconnected: %s", err);
 132                 sm_destroy_session(session);
 133                 sessions[conn]  = nil;
 134                 session = nil;
 135                 collectgarbage("collect");
 136         end
 137 end
 138
 139 connlisteners_register("xmppclient", xmppclient);