Mercurial > prosody-modules

annotate mod_muc_ban_ip/mod_muc_ban_ip.lua @ 5354:39d59d857bfb

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mod_http_oauth2: Use new mod_cron API for periodic cleanup Less frequent but this isn't that important after all since, as the comment states, expired codes are not usable anyway. They're also not that large so memory usage probably doesn't matter.
author Kim Alvefur <zash@zash.se>
date Sat, 22 Apr 2023 11:59:52 +0200
parents 47d9f704d14b
children
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1005
591590de34ef mod_muc_ban_ip: When a user is banned from a MUC, ban their IP from the MUC also (works for remote rooms too)
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1 module:set_global();
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2
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3 local jid_bare, jid_host = require "util.jid".bare, require "util.jid".host;
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4 local st = require "util.stanza";
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5 local xmlns_muc_user = "http://jabber.org/protocol/muc#user";
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6
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7 local trusted_services = module:get_option_inherited_set("muc_ban_ip_trusted_services", {});
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8 local trust_local_restricted_services = module:get_option_boolean("muc_ban_ip_trust_local_restricted_services", true);
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9
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10 local ip_bans = module:shared("bans");
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11 local full_sessions = prosody.full_sessions;
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12
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13 local function is_local_restricted_service(host)
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14 local muc_service = prosody.hosts[host] and prosody.hosts[host].modules.muc;
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15 if muc_service and module:context(host):get_option("restrict_room_creation") ~= nil then -- COMPAT: May need updating post-0.12
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16 return true;
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17 end
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18 return false;
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19 end
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21 local function ban_ip(session, from)
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22 local ip = session.ip;
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23 if not ip then
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24 module:log("warn", "Failed to ban IP (IP unknown) for %s", session.full_jid);
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25 return;
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26 end
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27 local from_host = jid_host(from);
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28 if trusted_services:contains(from_host) or (trust_local_restricted_services and is_local_restricted_service(from_host)) then
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29 from = from_host; -- Ban from entire host
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30 end
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31 local banned_from = ip_bans[ip];
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32 if not banned_from then
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33 banned_from = {};
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34 ip_bans[ip] = banned_from;
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35 end
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36 banned_from[from] = true;
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37 module:log("debug", "Added ban for IP address %s from %s", ip, from);
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38 end
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39
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40 local function check_for_incoming_ban(event)
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41 local stanza = event.stanza;
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42 local to_session = full_sessions[stanza.attr.to];
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43 if to_session then
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44 local directed = to_session.directed;
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45 local from = stanza.attr.from;
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46 if directed and directed[from] and stanza.attr.type == "unavailable" then
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47 -- This is a stanza from somewhere we sent directed presence to (may be a MUC)
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48 local x = stanza:get_child("x", xmlns_muc_user);
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49 if x then
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50 for status in x:childtags("status") do
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51 if status.attr.code == '301' then
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52 ban_ip(to_session, jid_bare(from));
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53 end
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54 end
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55 end
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56 end
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57 end
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58 end
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59
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60 local function check_for_ban(event)
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61 local origin, stanza = event.origin, event.stanza;
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62 local ip = origin.ip;
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63 local to, to_host = jid_bare(stanza.attr.to), jid_host(stanza.attr.to);
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64 if ip_bans[ip] and (ip_bans[ip][to] or ip_bans[ip][to_host]) then
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65 (origin.log or module._log)("debug", "IP banned: %s is banned from %s", ip, to)
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66 if stanza.attr.type ~= "error" then
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67 origin.send(st.error_reply(stanza, "auth", "forbidden")
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68 :tag("x", { xmlns = xmlns_muc_user })
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69 :tag("status", { code = '301' }));
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70 end
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71 return true;
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72 end
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73 (origin.log or module._log)("debug", "IP not banned: %s from %s", ip, to)
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74 end
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75
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76 function module.add_host(module)
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77 module:hook("presence/full", check_for_incoming_ban, 100);
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78 module:hook("pre-presence/full", check_for_ban, 100);
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79 end