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annotate mod_throttle_unsolicited/mod_throttle_unsolicited.lua @ 5819:bb51cf204dd4 default tip

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mod_sasl_ssdp: Fix event name so legacy SASL works correctly (thanks Martin!)
author Matthew Wild <mwild1@gmail.com>
date Tue, 09 Jan 2024 13:50:18 +0000
parents 4d8a68557941
children
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2082
163d55777ad5 mod_throttle_unsolicited: Limit rate of unsolicited messages sent to non-contacts
Kim Alvefur <zash@zash.se>
parents:
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1 local st = require"util.stanza";
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Kim Alvefur <zash@zash.se>
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2 local jid_split = require "util.jid".split;
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3 local jid_bare = require "util.jid".bare;
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4 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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5 local throttle = require "util.throttle";
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f6dcfe263b85 mod_throttle_unsolicited: Mark sessions so they can be matched with 'ORIGIN_MARKED: throttle_unsolicited' by mod_firewall
Kim Alvefur <zash@zash.se>
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6 local gettime = require "socket".gettime;
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7
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8 local max = module:get_option_number("unsolicited_messages_per_minute", 10);
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9 local s2s_max = module:get_option_number("unsolicited_s2s_messages_per_minute");
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163d55777ad5 mod_throttle_unsolicited: Limit rate of unsolicited messages sent to non-contacts
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10 local multiplier = module:get_option_number("throttle_unsolicited_burst", 1);
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11
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12 function check_subscribed(event)
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13 local stanza, origin = event.stanza, event.origin;
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14 local log = origin.log or module._log;
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15 if stanza.attr.type == "error" then return end
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16
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17 local to_orig = stanza.attr.to;
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18 if to_orig == nil or to_orig == origin.full_jid then return end -- to self
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19
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20 local to_bare = jid_bare(to_orig);
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21 local from_jid = jid_bare(stanza.attr.from);
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22 if to_bare == from_jid then return end -- to own resource
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23
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24 -- Check if it's a message to a joined room
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25 local rooms = origin.rooms_joined;
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26 if rooms and rooms[to_bare] then
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27 return
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28 end
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29
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30 -- Retrieve or create throttle object
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31 local lim = origin.throttle_unsolicited;
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32 if not lim then
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33 lim = throttle.create(max * multiplier, 60 * multiplier);
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34 origin.throttle_unsolicited = lim;
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35 end
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36
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37 local to_user, to_host = jid_split(to_orig);
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38 if to_user and not is_contact_subscribed(to_user, to_host, from_jid) then
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4d8a68557941 mod_throttle_unsolicited: reduce debug logs, rename firewall mark
Georg Lukas <georg@op-co.de>
parents: 2361
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39 log("debug", "[unsolicited] %s is not subscribed to %s@%s", from_jid, to_user, to_host);
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40 if not lim:poll(1) then
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Georg Lukas <georg@op-co.de>
parents: 2361
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41 log("warn", "[unsolicited] Sent too many messages to non-contacts, bouncing message");
4d8a68557941 mod_throttle_unsolicited: reduce debug logs, rename firewall mark
Georg Lukas <georg@op-co.de>
parents: 2361
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42 origin.firewall_mark_unsolicited = gettime();
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231d47e61c81 mod_throttle_unsolicited: Use existing local reference to origin
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parents: 2324
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43 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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44 return true;
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45 end
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46 end
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47 end
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48
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49 module:hook("pre-message/bare", check_subscribed, 200);
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50 module:hook("pre-message/full", check_subscribed, 200);
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51
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52 local full_sessions = prosody.full_sessions;
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53
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54 -- Rooms and throttle creation will differ for s2s
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55 function check_subscribed_s2s(event)
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56 local stanza, origin = event.stanza, event.origin;
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57 local log = origin.log or module._log;
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58
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59 if origin.type ~= "s2sin" then return end
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60
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61 local to_orig = stanza.attr.to;
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62 local from_orig = stanza.attr.from;
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63 local from_bare = jid_bare(from_orig);
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64
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65 local target = full_sessions[to_orig];
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66 if target then
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67 local rooms = target.rooms_joined;
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68 if rooms and rooms[from_bare] then
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69 log("debug", "Message to joined room, no limit");
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70 return
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71 end
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72 end
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73
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74 -- Retrieve or create throttle object
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75 local lim = origin.throttle_unsolicited;
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76 if not lim then
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77 log("debug", "New s2s throttle");
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78 lim = throttle.create(s2s_max * multiplier, 60 * multiplier);
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79 origin.throttle_unsolicited = lim;
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80 end
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81
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82 return check_subscribed(event);
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83 end
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84
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85 if s2s_max then
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86 module:hook("message/bare", check_subscribed_s2s, 200);
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87 module:hook("message/full", check_subscribed_s2s, 200);
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88 end
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89
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90 module:depends("track_muc_joins");