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annotate mod_auto_moved/mod_auto_moved.lua @ 5160:8474a3b80200

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mod_firewall: Fix 'is_admin' internal dependency rule #1797 (thanks diane) Looks like the boolean logic was inverted here. Instead, for now, simply check if is_admin is there. It is deprecated in trunk and was briefly removed before being brought back with a 'deprecated' warning as part of the new roles and permissions work. Making this dependency conditioned on the existence of the underlying function should make it work until it actually goes away for real.
author Kim Alvefur <zash@zash.se>
date Fri, 27 Jan 2023 23:06:25 +0100
parents f95a1e197a07
children
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1 local id = require "util.id";
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2 local jid = require "util.jid";
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3 local promise = require "util.promise";
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4 local rm = require "core.rostermanager";
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5 local st = require "util.stanza";
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6
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7 local errors = require "util.error".init(module.name, {
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8 ["statement-not-found"] = { type = "cancel", condition = "item-not-found" };
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9 ["statement-mismatch"] = { type = "cancel", condition = "conlict" };
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10 });
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11
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12 module:hook("presence/bare", function (event)
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13 local origin, stanza = event.origin, event.stanza;
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14 if stanza.attr.type ~= "subscribe" then
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15 return; -- We're only interested in subscription requests
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16 end
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17 local moved = stanza:get_child("moved", "urn:xmpp:moved:1");
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18 if not moved then
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19 return; -- We're only interested in stanzas with a moved notification
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20 end
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21
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22 local verification = stanza:get_child("moved-verification", "https://prosody.im/protocol/moved");
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23 if verification then
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24 return; -- We already attempted to verify this stanza
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25 end
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26
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27 module:log("debug", "Received moved notification from %s", stanza.attr.from);
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28
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29 local old_jid = moved:get_child_text("old-jid");
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30 if not old_jid then
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31 return; -- Failed to read old JID
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32 end
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33
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34 local to_user = jid.node(stanza.attr.to);
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35 local new_jid_unverified = jid.bare(stanza.attr.from);
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36
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37 if not rm.is_contact_subscribed(to_user, module.host, old_jid) then
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38 return; -- Old JID was not an existing contact, ignore
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39 end
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40
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41 if rm.is_contact_pending_in(to_user, module.host, new_jid_unverified)
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42 or rm.is_contact_subscribed(to_user, module.host, new_jid_unverified) then
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43 return; -- New JID already subscribed or pending, ignore
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44 end
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45
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46 local moved_statement_query = st.iq({ to = old_jid, type = "get", id = id.short() })
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47 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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48 :tag("items", { node = "urn:xmpp:moved:1" })
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49 :tag("item", { id = "current" }):up()
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50 :up()
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51 :up();
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52 -- TODO: Catch and handle <gone/> errors per note in XEP-0283.
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53 module:send_iq(moved_statement_query):next(function (reply)
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54 module:log("debug", "Statement reply: %s", reply.stanza);
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55 local moved_statement = reply.stanza:find("{http://jabber.org/protocol/pubsub}pubsub/items/{http://jabber.org/protocol/pubsub}item/{urn:xmpp:moved:1}moved");
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56 if not moved_statement then
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57 return promise.reject(errors.new("statement-not-found")); -- No statement found
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58 end
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59
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60 local new_jid = jid.prep(moved_statement:get_child_text("new-jid"));
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61 if new_jid ~= new_jid_unverified then
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62 return promise.reject(errors.new("statement-mismatch")); -- Verification failed; JIDs do not match
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63 end
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64
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65 -- Verified!
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66 module:log("info", "Verified moved notification <%s> -> <%s>", old_jid, new_jid);
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67
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68 -- Add incoming subscription and respond
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69 rm.set_contact_pending_in(to_user, module.host, new_jid);
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70 rm.subscribed(to_user, module.host, new_jid);
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71 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribed" }));
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72 rm.roster_push(to_user, module.host, new_jid);
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73
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74 -- Request outgoing subscription if old JID had one
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75 if rm.is_user_subscribed(to_user, module.host, old_jid) then
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76 module:log("debug", "Requesting subscription to new JID");
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77 rm.set_contact_pending_out(to_user, module.host, new_jid);
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78 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribe" }));
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79 end
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80 end):catch(function (err)
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81 module:log("debug", "Failed to verify moved statement for <%s> -> <%s>: %s", old_jid, new_jid_unverified, require "util.serialization".serialize(err, "debug"));
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82 stanza:reset()
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83 :tag("moved-verification", { xmlns = "https://prosody.im/protocol/moved", status = "failed" })
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84 :up();
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85 module:send(stanza, origin);
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86 end);
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87
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88 -- Halt processing of the stanza, for now
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89 return true;
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90 end, 1);