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annotate mod_muc_ban_ip/mod_muc_ban_ip.lua @ 2410:898e70e85185

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mod_firewall/README: Document SUBSCRIBED
author Kim Alvefur <zash@zash.se>
date Fri, 02 Dec 2016 20:17:10 +0100
parents 933403ee07ec
children 823027110e29
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1005
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1 module:set_global();
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2
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3 local jid_bare = require "util.jid".bare;
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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 ip_bans = module:shared("bans");
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8 local full_sessions = prosody.full_sessions;
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9
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10 local function ban_ip(session, from)
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11 local ip = session.ip;
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12 if not ip then
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13 module:log("warn", "Failed to ban IP (IP unknown) for %s", session.full_jid);
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14 return;
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15 end
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16 local banned_from = ip_bans[ip];
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17 if not banned_from then
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18 banned_from = {};
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19 ip_bans[ip] = banned_from;
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20 end
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21 banned_from[from] = true;
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22 module:log("debug", "Banned IP address %s from %s", ip, from);
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23 end
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24
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25 local function check_for_incoming_ban(event)
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26 local stanza = event.stanza;
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27 local to_session = full_sessions[stanza.attr.to];
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28 if to_session then
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29 local directed = to_session.directed;
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30 local from = stanza.attr.from;
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31 if directed and directed[from] and stanza.attr.type == "unavailable" then
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32 -- This is a stanza from somewhere we sent directed presence to (may be a MUC)
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33 local x = stanza:get_child("x", xmlns_muc_user);
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34 if x then
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35 for status in x:childtags("status") do
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36 if status.attr.code == '301' then
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37 ban_ip(to_session, jid_bare(from));
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38 end
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39 end
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40 end
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41 end
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42 end
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43 end
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44
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45 local function check_for_ban(event)
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46 local ip = event.origin.ip;
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47 local to = jid_bare(event.stanza.attr.to);
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48 if ip_bans[ip] and ip_bans[ip][to] then
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49 event.origin.send(st.error_reply(event.stanza, "auth", "forbidden")
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50 :tag("x", { xmlns = xmlns_muc_user })
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51 :tag("status", { code = '301' }));
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52 return true;
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53 end
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54 module:log("debug", "Not banned: %s from %s", ip, to)
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55 end
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56
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57 function module.add_host(module)
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58 module:hook("presence/full", check_for_incoming_ban, 100);
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59 module:hook("pre-presence/full", check_for_ban, 100);
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60 end