Mercurial > prosody-modules

annotate mod_blocking/mod_blocking.lua @ 4537:53ee391ca689

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mod_smacks: Fix traceback due to session being destroyed in send() Sending something can cause the OS to notice that the connection is dead and then the connection can be dead at this point. More likely if opportunistic_writes is enabled.
author Kim Alvefur <zash@zash.se>
date Thu, 01 Apr 2021 11:35:26 +0200
parents 1856c3aae92d
children
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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, id = "blocking-push" });
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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
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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
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125 local username, host = jid_split(stanza.attr.from);
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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];
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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;
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132 end
164
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133 if #block_jid_list == 0 then
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134 session.send(st.error_reply(stanza, "modify", "bad-request"));
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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);
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141 end
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142 return true;
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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);
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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
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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);
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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);