core/sessionmanager.lua

   1
   2 local tonumber, tostring = tonumber, tostring;
   3 local ipairs, pairs, print, next= ipairs, pairs, print, next;
   4 local collectgarbage = collectgarbage;
   5 local m_random = import("math", "random");
   6 local format = import("string", "format");
   7
   8 local hosts = hosts;
   9 local sessions = sessions;
  10
  11 local modulemanager = require "core.modulemanager";
  12 local log = require "util.logger".init("sessionmanager");
  13 local error = error;
  14 local uuid_generate = require "util.uuid".uuid_generate;
  15 local rm_load_roster = require "core.rostermanager".load_roster;
  16
  17 local newproxy = newproxy;
  18 local getmetatable = getmetatable;
  19
  20 module "sessionmanager"
  21
  22 local open_sessions = 0;
  23
  24 function new_session(conn)
  25         local session = { conn = conn,  priority = 0, type = "c2s_unauthed" };
  26         if true then
  27                 session.trace = newproxy(true);
  28                 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("Session got collected, now "..open_sessions.." sessions are allocated") end;
  29         end
  30         open_sessions = open_sessions + 1;
  31         local w = conn.write;
  32         session.send = function (t) w(tostring(t)); end
  33         return session;
  34 end
  35
  36 function destroy_session(session)
  37         session.log("info", "Destroying session");
  38         if session.username then
  39                 if session.resource then
  40                         hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
  41                 end
  42
  43                 if not next(hosts[session.host].sessions[session.username].sessions) then
  44                         log("debug", "All resources of %s are now offline", session.username);
  45                         hosts[session.host].sessions[session.username] = nil;
  46                 end
  47         end
  48         session.conn = nil;
  49         session.disconnect = nil;
  50         for k in pairs(session) do
  51                 if k ~= "trace" then
  52                         session[k] = nil;
  53                 end
  54         end
  55 end
  56
  57 function send_to_session(session, data)
  58         log("debug", "Sending: %s", tostring(data));
  59         session.conn.write(tostring(data));
  60 end
  61
  62 function make_authenticated(session, username)
  63         session.username = username;
  64         if session.type == "c2s_unauthed" then
  65                 session.type = "c2s";
  66         end
  67         return true;
  68 end
  69
  70 function bind_resource(session, resource)
  71         if not session.username then return false, "auth"; end
  72         if session.resource then return false, "constraint"; end -- We don't support binding multiple resources
  73         resource = resource or uuid_generate();
  74         --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
  75
  76         if not hosts[session.host].sessions[session.username] then
  77                 hosts[session.host].sessions[session.username] = { sessions = {} };
  78         else
  79                 if hosts[session.host].sessions[session.username].sessions[resource] then
  80                         -- Resource conflict
  81                         return false, "conflict"; -- TODO kick old resource
  82                 end
  83         end
  84
  85         session.resource = resource;
  86         session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
  87         hosts[session.host].sessions[session.username].sessions[resource] = session;
  88
  89         session.roster = rm_load_roster(session.username, session.host);
  90
  91         return true;
  92 end
  93
  94 function streamopened(session, attr)
  95                                                 local send = session.send;
  96                                                 session.host = attr.to or error("Client failed to specify destination hostname");
  97                                                 session.version = tonumber(attr.version) or 0;
  98                                                 session.streamid = m_random(1000000, 99999999);
  99                                                 print(session, session.host, "Client opened stream");
 100                                                 send("<?xml version='1.0'?>");
 101                                                 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0'>", session.streamid, session.host));
 102
 103                                                 local features = {};
 104                                                 modulemanager.fire_event("stream-features", session, features);
 105
 106                                                 send("<stream:features>");
 107
 108                                                 for _, feature in ipairs(features) do
 109                                                         send_to_session(session, tostring(feature));
 110                                                 end
 111
 112                                                 send("</stream:features>");
 113                                                 log("info", "Stream opened successfully");
 114                                                 session.notopen = nil;
 115 end
 116
 117 return _M;