prosody
d2c4856c7ed5
plugins/mod_disco.lua

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plugins/mod_disco.lua @ 3695:d2c4856c7ed5

mod_disco: Don't add caps hash to stream features on unauthenticated connections.
author Waqas Hussain <waqas20@gmail.com>
date Fri, 03 Dec 2010 00:37:54 +0500
parent 3665:98b55c3a3deb
child 4337:a2ee8ab82dd9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Matthew Wild <mwild1@gmail.com>
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diff changeset
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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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
b1885732e979 GPL->MIT!
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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 local get_children = require "core.hostmanager".get_children;
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10 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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11 local jid_split = require "util.jid".split;
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12 local jid_bare = require "util.jid".bare;
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13 local st = require "util.stanza"
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14 local calculate_hash = require "util.caps".calculate_hash;
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15
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16 local disco_items = module:get_option("disco_items") or {};
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parents: 2383
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17 do -- validate disco_items
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parents: 2383
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18 for _, item in ipairs(disco_items) do
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parents: 2383
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19 local err;
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20 if type(item) ~= "table" then
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21 err = "item is not a table";
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22 elseif type(item[1]) ~= "string" then
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23 err = "item jid is not a string";
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24 elseif item[2] and type(item[2]) ~= "string" then
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25 err = "item name is not a string";
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parents: 2383
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26 end
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parents: 2383
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27 if err then
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28 module:log("error", "option disco_items is malformed: %s", err);
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29 disco_items = {}; -- TODO clean up data instead of removing it?
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30 break;
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31 end
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32 end
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33 end
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34
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35 module:add_identity("server", "im", "Prosody"); -- FIXME should be in the non-existing mod_router
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36 module:add_feature("http://jabber.org/protocol/disco#info");
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37 module:add_feature("http://jabber.org/protocol/disco#items");
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38
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39 -- Generate and cache disco result and caps hash
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parents: 3343
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40 local _cached_server_disco_info, _cached_server_caps_feature, _cached_server_caps_hash;
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parents: 3343
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41 local function build_server_disco_info()
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42 local query = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" });
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43 local done = {};
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44 for _,identity in ipairs(module:get_host_items("identity")) do
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45 local identity_s = identity.category.."\0"..identity.type;
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parents: 2925
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46 if not done[identity_s] then
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47 query:tag("identity", identity):up();
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48 done[identity_s] = true;
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parents: 2925
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49 end
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50 end
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51 for _,feature in ipairs(module:get_host_items("feature")) do
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52 if not done[feature] then
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53 query:tag("feature", {var=feature}):up();
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54 done[feature] = true;
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parents: 2925
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55 end
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56 end
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57 _cached_server_disco_info = query;
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58 _cached_server_caps_hash = calculate_hash(query);
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59 _cached_server_caps_feature = st.stanza("c", {
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60 xmlns = "http://jabber.org/protocol/caps";
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61 hash = "sha-1";
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62 node = "http://prosody.im";
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63 ver = _cached_server_caps_hash;
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64 });
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65 end
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66 local function clear_disco_cache()
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67 _cached_server_disco_info, _cached_server_caps_feature, _cached_server_caps_hash = nil, nil, nil;
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68 end
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69 local function get_server_disco_info()
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70 if not _cached_server_disco_info then build_server_disco_info(); end
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71 return _cached_server_disco_info;
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72 end
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73 local function get_server_caps_feature()
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parents: 3343
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74 if not _cached_server_caps_feature then build_server_disco_info(); end
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75 return _cached_server_caps_feature;
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76 end
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77 local function get_server_caps_hash()
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parents: 3343
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78 if not _cached_server_caps_hash then build_server_disco_info(); end
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79 return _cached_server_caps_hash;
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parents: 3343
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80 end
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81
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82 module:hook("item-added/identity", clear_disco_cache);
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83 module:hook("item-added/feature", clear_disco_cache);
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84 module:hook("item-removed/identity", clear_disco_cache);
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85 module:hook("item-removed/feature", clear_disco_cache);
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86
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87 -- Handle disco requests to the server
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88 module:hook("iq/host/http://jabber.org/protocol/disco#info:query", function(event)
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89 local origin, stanza = event.origin, event.stanza;
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90 if stanza.attr.type ~= "get" then return; end
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91 local node = stanza.tags[1].attr.node;
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92 if node and node ~= "" and node ~= "http://prosody.im#"..get_server_caps_hash() then return; end -- TODO fire event?
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93 local reply_query = get_server_disco_info();
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94 reply_query.node = node;
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95 local reply = st.reply(stanza):add_child(reply_query);
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96 origin.send(reply);
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97 return true;
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98 end);
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99 module:hook("iq/host/http://jabber.org/protocol/disco#items:query", function(event)
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100 local origin, stanza = event.origin, event.stanza;
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101 if stanza.attr.type ~= "get" then return; end
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102 local node = stanza.tags[1].attr.node;
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103 if node and node ~= "" then return; end -- TODO fire event?
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104
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105 local reply = st.reply(stanza):query("http://jabber.org/protocol/disco#items");
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106 for jid in pairs(get_children(module.host)) do
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107 reply:tag("item", {jid = jid}):up();
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108 end
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109 for _, item in ipairs(disco_items) do
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110 reply:tag("item", {jid=item[1], name=item[2]}):up();
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111 end
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112 origin.send(reply);
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113 return true;
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114 end);
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115
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116 -- Handle caps stream feature
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117 module:hook("stream-features", function (event)
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118 if event.origin.type == "c2s" then
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119 event.features:add_child(get_server_caps_feature());
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120 end
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121 end);
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122
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123 -- Handle disco requests to user accounts
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124 module:hook("iq/bare/http://jabber.org/protocol/disco#info:query", function(event)
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125 local origin, stanza = event.origin, event.stanza;
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126 if stanza.attr.type ~= "get" then return; end
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127 local node = stanza.tags[1].attr.node;
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128 if node and node ~= "" then return; end -- TODO fire event?
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129 local username = jid_split(stanza.attr.to) or origin.username;
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130 if not stanza.attr.to or is_contact_subscribed(username, module.host, jid_bare(stanza.attr.from)) then
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131 local reply = st.reply(stanza):tag('query', {xmlns='http://jabber.org/protocol/disco#info'});
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132 if not reply.attr.from then reply.attr.from = origin.username.."@"..origin.host; end -- COMPAT To satisfy Psi when querying own account
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133 module:fire_event("account-disco-info", { origin = origin, stanza = reply });
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134 origin.send(reply);
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135 return true;
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136 end
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137 end);
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138 module:hook("iq/bare/http://jabber.org/protocol/disco#items:query", function(event)
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139 local origin, stanza = event.origin, event.stanza;
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140 if stanza.attr.type ~= "get" then return; end
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141 local node = stanza.tags[1].attr.node;
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142 if node and node ~= "" then return; end -- TODO fire event?
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143 local username = jid_split(stanza.attr.to) or origin.username;
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144 if not stanza.attr.to or is_contact_subscribed(username, module.host, jid_bare(stanza.attr.from)) then
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145 local reply = st.reply(stanza):tag('query', {xmlns='http://jabber.org/protocol/disco#items'});
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146 if not reply.attr.from then reply.attr.from = origin.username.."@"..origin.host; end -- COMPAT To satisfy Psi when querying own account
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147 module:fire_event("account-disco-items", { origin = origin, stanza = reply });
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148 origin.send(reply);
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149 return true;
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150 end
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151 end);