net/xmppserver_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 local s2s_new_incoming = require "core.s2smanager".new_incoming;
   7 local s2s_streamopened = require "core.s2smanager".streamopened;
   8 local s2s_destroy_session = require "core.s2smanager".destroy_session;
   9
  10 local connlisteners_register = require "net.connlisteners".register;
  11
  12 local t_insert = table.insert;
  13 local t_concat = table.concat;
  14 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
  15 local m_random = math.random;
  16 local format = string.format;
  17 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session");
  18 local st = stanza;
  19
  20 local sessions = {};
  21 local xmppserver = { default_port = 5269 };
  22
  23 -- These are session methods --
  24
  25 local function session_reset_stream(session)
  26         -- Reset stream
  27                 local parser = lxp.new(init_xmlhandlers(session, s2s_streamopened), "|");
  28                 session.parser = parser;
  29
  30                 session.notopen = true;
  31
  32                 function session.data(conn, data)
  33                         parser:parse(data);
  34                 end
  35                 return true;
  36 end
  37
  38
  39 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
  40 local function session_disconnect(session, reason)
  41         local log = session.log or log;
  42         if session.conn then
  43                 if reason then
  44                         if type(reason) == "string" then -- assume stream error
  45                                 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
  46                                 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
  47                         elseif type(reason) == "table" then
  48                                 if reason.condition then
  49                                         local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
  50                                         if reason.text then
  51                                                 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
  52                                         end
  53                                         if reason.extra then
  54                                                 stanza:add_child(reason.extra);
  55                                         end
  56                                         log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
  57                                         session.send(stanza);
  58                                 elseif reason.name then -- a stanza
  59                                         log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(reason));
  60                                         session.send(reason);
  61                                 end
  62                         end
  63                 end
  64                 session.send("</stream:stream>");
  65                 session.conn.close();
  66                 xmppserver.disconnect(session.conn, "stream error");
  67         end
  68 end
  69
  70
  71 -- End of session methods --
  72
  73 function xmppserver.listener(conn, data)
  74         local session = sessions[conn];
  75         if not session then
  76                 session = s2s_new_incoming(conn);
  77                 sessions[conn] = session;
  78
  79                 -- Logging functions --
  80
  81                 local mainlog, log = log;
  82                 do
  83                         local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
  84                         log = logger.init(conn_name);
  85                 end
  86                 local print = function (...) log("info", t_concatall({...}, "\t")); end
  87                 session.log = log;
  88
  89                 print("Incoming s2s connection");
  90
  91                 session.reset_stream = session_reset_stream;
  92                 session.disconnect = session_disconnect;
  93
  94                 session_reset_stream(session); -- Initialise, ready for use
  95
  96                 -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
  97                 -- this will avoid the useless indirection we have atm
  98                 -- (I'm on a mission, no time to fix now)
  99
 100                 -- Debug version --
 101                 local function handleerr(err) print("Traceback:", err, debug.traceback()); end
 102                 session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr));  end
 103
 104 --              session.stanza_dispatch = function (stanza) return core_process_stanza(session, stanza); end
 105
 106         end
 107         if data then
 108                 session.data(conn, data);
 109         end
 110 end
 111
 112 function xmppserver.disconnect(conn)
 113         local session = sessions[conn];
 114         if session then
 115                 s2s_destroy_session(session);
 116                 sessions[conn]  = nil;
 117                 session = nil;
 118                 collectgarbage("collect");
 119         end
 120 end
 121
 122 function xmppserver.register_outgoing(conn, session)
 123         session.direction = "outgoing";
 124         sessions[conn] = session;
 125
 126         session.reset_stream = session_reset_stream;
 127         session_reset_stream(session); -- Initialise, ready for use
 128
 129         -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
 130         -- this will avoid the useless indirection we have atm
 131         -- (I'm on a mission, no time to fix now)
 132         session.stanza_dispatch = function (stanza) return core_process_stanza(session, stanza); end
 133 end
 134
 135 connlisteners_register("xmppserver", xmppserver);
 136
 137
 138 -- We need to perform some initialisation when a connection is created
 139 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
 140
 141 -- ...and we need to handle data
 142 -- ...and record all sessions associated with connections