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".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 or log)("info", "Destroying session");
  38         if session.host and session.username then
  39                 if session.resource then
  40                         hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
  41                 end
  42                 if hosts[session.host] and hosts[session.host].sessions[session.username] then
  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         end
  49         session.conn = nil;
  50         session.disconnect = nil;
  51         for k in pairs(session) do
  52                 if k ~= "trace" then
  53                         session[k] = nil;
  54                 end
  55         end
  56 end
  57
  58 function send_to_session(session, data)
  59         log("debug", "Sending: %s", tostring(data));
  60         session.conn.write(tostring(data));
  61 end
  62
  63 function make_authenticated(session, username)
  64         session.username = username;
  65         if session.type == "c2s_unauthed" then
  66                 session.type = "c2s";
  67         end
  68         return true;
  69 end
  70
  71 -- returns true, nil on success
  72 -- returns nil, err_type, err, err_message on failure
  73 function bind_resource(session, resource)
  74         if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
  75         if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
  76         -- We don't support binding multiple resources
  77
  78         resource = resource or uuid_generate();
  79         --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
  80
  81         if not hosts[session.host].sessions[session.username] then
  82                 hosts[session.host].sessions[session.username] = { sessions = {} };
  83         else
  84                 if hosts[session.host].sessions[session.username].sessions[resource] then
  85                         -- Resource conflict
  86                         return nil, "cancel", "conflict", "Resource already exists"; -- TODO kick old resource
  87                 end
  88         end
  89
  90         session.resource = resource;
  91         session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
  92         hosts[session.host].sessions[session.username].sessions[resource] = session;
  93
  94         session.roster = rm_load_roster(session.username, session.host);
  95
  96         return true;
  97 end
  98
  99 function streamopened(session, attr)
 100                                                 local send = session.send;
 101                                                 session.host = attr.to or error("Client failed to specify destination hostname");
 102                                                 session.version = tonumber(attr.version) or 0;
 103                                                 session.streamid = m_random(1000000, 99999999);
 104                                                 print(session, session.host, "Client opened stream");
 105                                                 send("<?xml version='1.0'?>");
 106                                                 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));
 107
 108                                                 local features = {};
 109                                                 modulemanager.fire_event("stream-features", session, features);
 110
 111                                                 send("<stream:features>");
 112
 113                                                 for _, feature in ipairs(features) do
 114                                                         send_to_session(session, tostring(feature));
 115                                                 end
 116
 117                                                 send("</stream:features>");
 118                                                 log("info", "Stream opened successfully");
 119                                                 session.notopen = nil;
 120 end
 121
 122 function send_to_available_resources(user, host, stanza)
 123         local count = 0;
 124         local to = stanza.attr.to;
 125         stanza.attr.to = nil;
 126         local h = hosts[host];
 127         if h and h.type == "local" then
 128                 local u = h.sessions[user];
 129                 if u then
 130                         for k, session in pairs(u.sessions) do
 131                                 if session.presence then
 132                                         session.send(stanza);
 133                                         count = count + 1;
 134                                 end
 135                         end
 136                 end
 137         end
 138         stanza.attr.to = to;
 139         return count;
 140 end
 141
 142 return _M;