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annotate mod_report_forward/mod_report_forward.lua @ 5857:ff90dad75352

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mod_report_forward: Fixes for abuse contact address lookup in origin reporting
author Matthew Wild <mwild1@gmail.com>
date Sun, 03 Mar 2024 18:06:47 +0000
parents 6fe4dab27187
children fdff8cb54302
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 local dt = require "util.datetime";
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2 local jid = require "util.jid";
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3 local st = require "util.stanza";
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4 local url = require "socket.url";
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5
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6 local new_id = require "util.id".short;
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7 local render = require"util.interpolation".new("%b{}", function (s) return s; end);
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8
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9 module:depends("spam_reporting");
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10
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11 local destinations = module:get_option_set("report_forward_to", {});
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12
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13 local archive = module:open_store("archive", "archive");
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14
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15 local cache_size = module:get_option_number("report_forward_contact_cache_size", 256);
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16 local report_to_origin = module:get_option_boolean("report_forward_to_origin", true);
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17 local contact_lookup_timeout = module:get_option_number("report_forward_contact_lookup_timeout", 180);
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18
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19 local body_template = module:get_option_string("report_forward_body_template", [[
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20 SPAM/ABUSE REPORT
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21 -----------------
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22
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23 Reported JID: {reported_jid}
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24
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25 A user on our service has reported a message originating from the above JID on
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26 your server.
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27
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28 {reported_message_time&The reported message was sent at: {reported_message_time}}
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29
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30 --
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31 This message contains also machine-readable payloads, including XEP-0377, in case
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32 you want to automate handling of these reports. You can receive these reports
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33 to a different address by setting 'spam-report-addresses' in your server
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34 contact info configuration. For more information, see https://xmppbl.org/reports/
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35 ]]):gsub("^%s+", ""):gsub("(%S)\n(%S)", "%1 %2");
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36
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37 local report_addresses = require "util.cache".new(cache_size);
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38
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39 local function get_address(form, ...)
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40 for i = 1, select("#", ...) do
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41 local field_var = select(i, ...);
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42 local field = form:get_child_with_attr("field", nil, "var", field_var);
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43 if field then
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44 local parsed = url.parse(field:get_child_text("value"));
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45 if parsed.scheme == "xmpp" and parsed.path and not parsed.query then
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46 return parsed.path;
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47 end
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48 else
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49 module:log("debug", "No field '%s'", field_var);
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50 end
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51 end
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52 end
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53
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54 local function get_origin_report_address(reported_jid)
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55 local host = jid.host(reported_jid);
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56 local address = report_addresses:get(host);
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57 if address then return address; end
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58
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59 local contact_query = st.iq({ type = "get", to = host, from = module.host, id = new_id() })
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60 :query("http://jabber.org/protocol/disco#info");
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61
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62 return module:send_iq(contact_query, prosody.hosts[module.host], contact_lookup_timeout)
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63 :next(function (result)
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64 module:log("debug", "Processing contact form...");
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65 local response = result.stanza;
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66 if response.attr.type ~= "result" then
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67 module:log("warn", "Failed to query contact addresses of %s: %s", host, response);
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68 return;
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69 end
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70
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71 for form in response.tags[1]:childtags("x", "jabber:x:data") do
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72 local form_type = form:get_child_with_attr("field", nil, "var", "FORM_TYPE");
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73 if form_type and form_type:get_child_text("value") == "http://jabber.org/network/serverinfo" then
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74 address = get_address(form, "spam-report-addresses", "abuse-addresses");
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75 break;
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76 end
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77 end
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78 return address;
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79 end);
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80 end
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81
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82 local function send_report(to, message)
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83 local m = st.clone(message);
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84 m.attr.to = to;
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85 module:send(m);
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86 end
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87
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88 function forward_report(event)
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89 local reporter_username = event.origin.username;
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90 local reporter_jid = jid.join(reporter_username, module.host);
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91 local reported_jid = event.jid;
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92
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93 local report = st.clone(event.report);
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94 report:text_tag("jid", reported_jid, { xmlns = "urn:xmpp:jid:0" });
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95
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96 local reported_message_id = report:get_child_with_attr(
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97 "stanza-id",
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98 "urn:xmpp:sid:0",
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99 "by",
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100 reported_jid,
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101 jid.prep
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102 );
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103
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104 local reported_message, reported_message_time, reported_message_with;
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105 if reported_message_id then
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106 reported_message, reported_message_time, reported_message_with = archive:get(reporter_username, reported_message_id);
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107 if jid.bare(reported_message_with) ~= event.jid then
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108 reported_message = nil;
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109 end
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110 end
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111
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112 local body_text = render(body_template, {
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113 reporter_jid = reporter_jid;
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114 reported_jid = event.jid;
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115 reported_message_time = dt.datetime(reported_message_time);
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116 });
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117
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118 local message = st.message({ from = module.host })
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119 :text_tag("body", body_text)
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120 :add_child(report);
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121
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122 if reported_message then
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123 reported_message.attr.xmlns = "jabber:client";
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124 local fwd = st.stanza("forwarded", { xmlns = "urn:xmpp:forward:0" })
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125 :tag("delay", { xmlns = "urn:xmpp:delay", stamp = dt.datetime(reported_message_time) }):up()
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126 :add_child(reported_message);
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127 message:add_child(fwd);
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128 end
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129
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130 for destination in destinations do
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131 send_report(destination, message);
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132 end
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133
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134 if report_to_origin then
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135 module:log("debug", "Sending report to origin server...");
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136 get_origin_report_address(event.jid):next(function (origin_report_address)
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137 if not origin_report_address then
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138 module:log("warn", "Couldn't report to origin: no contact address found for %s", jid.host(event.jid));
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139 return;
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140 end
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141 send_report(origin_report_address, message);
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142 end):catch(function (e)
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143 module:log("error", "Failed to report to origin server: %s", e);
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144 end);
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145 end
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146 end
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147
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148 module:hook("spam_reporting/abuse-report", forward_report, -1);
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149 module:hook("spam_reporting/spam-report", forward_report, -1);
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150 module:hook("spam_reporting/unknown-report", forward_report, -1);