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annotate mod_component_roundrobin/mod_component_roundrobin.lua @ 910:c469a2b2d77d

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mod_websocket: Avoid floating point division The problem here was that Lua's integer conversion (rounding?) routines behave differently on x86 vs. x86_64 (and even on those there can be minor differenes). Usually the former does proper rounding, while the later floors.
author Florian Zeitz <florob@babelmonkeys.de>
date Fri, 15 Feb 2013 01:32:03 +0100
parents a6d215c73c47
children 08e50d742392
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 if module:get_host_type() ~= "component" then
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10 error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0);
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11 end
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12
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13 local hosts = _G.hosts;
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14
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15 local t_concat = table.concat;
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16
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17 local sha1 = require "util.hashes".sha1;
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18 local st = require "util.stanza";
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19
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20 local log = module._log;
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21
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22 local sessions = {};
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23
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24 local function on_destroy(session, err)
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25 if sessions[session] then
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26 sessions[session] = nil;
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27 session.on_destroy = nil;
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28 end
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29 end
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30
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31 local last_session;
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32 local function handle_stanza(event)
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33 local stanza = event.stanza;
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34 if next(sessions) then
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35 stanza.attr.xmlns = nil;
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36 last_session = next(sessions, last_session) or next(sessions);
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37 last_session.send(stanza);
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38 else
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39 log("warn", "Component not connected, bouncing error for: %s", stanza:top_tag());
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40 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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41 event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
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42 end
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43 end
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44 return true;
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45 end
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46
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47 module:hook("iq/bare", handle_stanza, -1);
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48 module:hook("message/bare", handle_stanza, -1);
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49 module:hook("presence/bare", handle_stanza, -1);
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50 module:hook("iq/full", handle_stanza, -1);
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51 module:hook("message/full", handle_stanza, -1);
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52 module:hook("presence/full", handle_stanza, -1);
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53 module:hook("iq/host", handle_stanza, -1);
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54 module:hook("message/host", handle_stanza, -1);
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55 module:hook("presence/host", handle_stanza, -1);
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56
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57 --- Handle authentication attempts by components
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58 function handle_component_auth(event)
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59 local session, stanza = event.origin, event.stanza;
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60
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61 if session.type ~= "component" then return; end
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62 if sessions[session] then return; end
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63
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64 if (not session.host) or #stanza.tags > 0 then
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65 (session.log or log)("warn", "Invalid component handshake for host: %s", session.host);
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66 session:close("not-authorized");
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67 return true;
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68 end
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69
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70 local secret = module:get_option("component_secret");
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71 if not secret then
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72 (session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host);
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73 session:close("not-authorized");
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74 return true;
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75 end
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76
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77 local supplied_token = t_concat(stanza);
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78 local calculated_token = sha1(session.streamid..secret, true);
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79 if supplied_token:lower() ~= calculated_token:lower() then
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80 log("info", "Component authentication failed for %s", session.host);
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81 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
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82 return true;
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83 end
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84
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85 -- Add session to sessions table
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86 sessions[session] = true;
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87 session.on_destroy = on_destroy;
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88 session.component_validate_from = module:get_option_boolean("validate_from_addresses", true);
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89 log("info", "Component successfully authenticated: %s", session.host);
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90 session.send(st.stanza("handshake"));
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91
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92 return true;
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93 end
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94
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95 module:hook("stanza/jabber:component:accept:handshake", handle_component_auth);