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annotate mod_blocking/mod_blocking.lua @ 2543:3c16f0a8d66c

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mod_firewall: Do patterns properly, instead of cheating
author Matthew Wild <mwild1@gmail.com>
date Tue, 21 Feb 2017 22:41:08 +0000
parents 1e9a06caa866
children 1856c3aae92d
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1 local jid_split = require "util.jid".split;
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2 local st = require "util.stanza";
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3 local datamanager = require"util.datamanager";
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4
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5 local xmlns_blocking = "urn:xmpp:blocking";
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6
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7 module:add_feature("urn:xmpp:blocking");
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8
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9 -- Add JID to default privacy list
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10 function add_blocked_jid(username, host, jid)
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11 local privacy_lists = datamanager.load(username, host, "privacy") or {lists = {}};
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12 local default_list_name = privacy_lists.default;
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13 if not privacy_lists.lists then
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14 privacy_lists.lists = {}
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15 end
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16 if not default_list_name then
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17 default_list_name = "blocklist";
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18 privacy_lists.default = default_list_name;
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19 end
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20 local default_list = privacy_lists.lists[default_list_name];
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21 if not default_list then
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22 default_list = { name = default_list_name, items = {} };
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23 privacy_lists.lists[default_list_name] = default_list;
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24 end
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25 local items = default_list.items;
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26 local order = items[1] and items[1].order or 0; -- Must come first
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27 for i=1,#items do -- order must be unique
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28 local item = items[i];
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29 item.order = item.order + 1;
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30 if item.type == "jid" and item.action == "deny" and item.value == jid then
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31 return false;
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32 end
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33 end
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34 table.insert(items, 1, { type = "jid"
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35 , action = "deny"
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36 , value = jid
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37 , message = false
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38 , ["presence-out"] = false
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39 , ["presence-in"] = false
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40 , iq = false
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41 , order = order
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42 });
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43 datamanager.store(username, host, "privacy", privacy_lists);
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44 return true;
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45 end
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47 -- Remove JID from default privacy list
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48 function remove_blocked_jid(username, host, jid)
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49 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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50 local default_list_name = privacy_lists.default;
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51 if not default_list_name then return; end
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52 local default_list = privacy_lists.lists[default_list_name];
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53 if not default_list then return; end
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54 local items = default_list.items;
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55 local item, removed = nil, false;
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56 for i=1,#items do -- order must be unique
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57 item = items[i];
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58 if item.type == "jid" and item.action == "deny" and item.value == jid then
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59 table.remove(items, i);
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60 removed = true;
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61 break;
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62 end
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63 end
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64 if removed then
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65 datamanager.store(username, host, "privacy", privacy_lists);
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66 end
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67 return removed;
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68 end
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69
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70 function remove_all_blocked_jids(username, host)
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71 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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72 local default_list_name = privacy_lists.default;
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73 if not default_list_name then return; end
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74 local default_list = privacy_lists.lists[default_list_name];
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75 if not default_list then return; end
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76 local items = default_list.items;
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77 local item;
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78 for i=#items,1,-1 do -- order must be unique
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79 item = items[i];
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80 if item.type == "jid" and item.action == "deny" then
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81 table.remove(items, i);
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82 end
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83 end
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84 datamanager.store(username, host, "privacy", privacy_lists);
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85 return true;
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86 end
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87
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88 function get_blocked_jids(username, host)
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89 -- Return array of blocked JIDs in default privacy list
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90 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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91 local default_list_name = privacy_lists.default;
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92 if not default_list_name then return {}; end
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93 local default_list = privacy_lists.lists[default_list_name];
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94 if not default_list then return {}; end
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95 local items = default_list.items;
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96 local item;
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97 local jid_list = {};
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98 for i=1,#items do -- order must be unique
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99 item = items[i];
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100 if item.type == "jid" and item.action == "deny" then
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101 jid_list[#jid_list+1] = item.value;
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102 end
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103 end
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104 return jid_list;
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105 end
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106
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107 local function send_push_iqs(username, host, command_type, jids)
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108 local bare_jid = username.."@"..host;
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109
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110 local stanza_content = st.stanza(command_type, { xmlns = xmlns_blocking });
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111 for _, jid in ipairs(jids) do
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112 stanza_content:tag("item", { jid = jid }):up();
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113 end
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114
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115 for resource, session in pairs(prosody.bare_sessions[bare_jid].sessions) do
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116 local iq_push_stanza = st.iq({ type = "set", to = bare_jid.."/"..resource });
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117 iq_push_stanza:add_child(stanza_content);
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118 session.send(iq_push_stanza);
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119 end
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120 end
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121
262
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122 function handle_blocking_command(event)
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123 local session, stanza = event.origin, event.stanza;
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124
161
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125 local username, host = jid_split(stanza.attr.from);
164
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126 if stanza.attr.type == "set" then
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127 if stanza.tags[1].name == "block" then
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128 local block = stanza.tags[1];
164
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129 local block_jid_list = {};
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130 for item in block:childtags() do
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131 block_jid_list[#block_jid_list+1] = item.attr.jid;
161
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132 end
164
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133 if #block_jid_list == 0 then
262
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134 session.send(st.error_reply(stanza, "modify", "bad-request"));
164
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135 else
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136 for _, jid in ipairs(block_jid_list) do
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137 add_blocked_jid(username, host, jid);
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138 end
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139 session.send(st.reply(stanza));
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140 send_push_iqs(username, host, "block", block_jid_list);
164
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141 end
262
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142 return true;
164
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143 elseif stanza.tags[1].name == "unblock" then
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144 local unblock = stanza.tags[1];
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145 local unblock_jid_list = {};
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146 for item in unblock:childtags() do
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147 unblock_jid_list[#unblock_jid_list+1] = item.attr.jid;
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148 end
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149 if #unblock_jid_list == 0 then
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150 remove_all_blocked_jids(username, host);
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151 else
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152 for _, jid_to_unblock in ipairs(unblock_jid_list) do
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153 remove_blocked_jid(username, host, jid_to_unblock);
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154 end
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155 end
161
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156 session.send(st.reply(stanza));
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157 send_push_iqs(username, host, "unblock", unblock_jid_list);
262
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158 return true;
161
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159 end
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160 elseif stanza.attr.type == "get" and stanza.tags[1].name == "blocklist" then
175
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161 local reply = st.reply(stanza):tag("blocklist", { xmlns = xmlns_blocking });
161
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162 local blocked_jids = get_blocked_jids(username, host);
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163 for _, jid in ipairs(blocked_jids) do
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164 reply:tag("item", { jid = jid }):up();
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165 end
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166 session.send(reply);
262
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167 return true;
161
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168 end
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169 end
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170
262
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171 module:hook("iq/self/urn:xmpp:blocking:blocklist", handle_blocking_command);
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172 module:hook("iq/self/urn:xmpp:blocking:block", handle_blocking_command);
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173 module:hook("iq/self/urn:xmpp:blocking:unblock", handle_blocking_command);