mod_poke_strangers: Log details about JIDs that look like they are spamming.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_poke_strangers/README.markdown Fri Feb 05 11:23:13 2016 +0100
@@ -0,0 +1,24 @@
+---
+labels:
+- 'Stage-Alpha'
+summary: 'Query the features and version of JIDs sending messages to contacts they are not subscribed to.'
+...
+
+Introduction
+============
+
+In order to build heuristics for which messages are spam, it is necessary to
+log as many details as possible about the spammers. This module sends a
+version and disco query whenever a message is received from a JID to a user it
+is not subscribed to. The results are printed to Prosody's log file at the
+'info' level. Queried full JIDs are not queried again until Prosody restarts.
+
+The queries are sent regardless of whether the local user exists, so it does
+not reveal if an account is active.
+
+Compatibility
+=============
+
+ ----- -------
+ 0.9 Works
+ ----- -------
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_poke_strangers/mod_poke_strangers.lua Fri Feb 05 11:23:13 2016 +0100
@@ -0,0 +1,55 @@
+local st = require"util.stanza";
+local jid_split = require "util.jid".split;
+local jid_bare = require "util.jid".bare;
+local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
+local uuid_generate = require "util.uuid".generate;
+local set = require "util.set";
+
+local recently_queried = set.new();
+
+function check_subscribed(event)
+ local stanza = event.stanza;
+ local local_user_jid = stanza.attr.to;
+ local to_user, to_host, to_resource = jid_split(local_user_jid);
+ local stranger_jid = stanza.attr.from;
+
+ if recently_queried:contains(stranger_jid) then
+ module:log("debug", "Not re-poking " .. stranger_jid);
+ return nil;
+ end
+
+ local from_jid = jid_bare(stranger_jid);
+
+ if to_user and not is_contact_subscribed(to_user, to_host, from_jid) then
+ if to_resource and stanza.attr.type == "groupchat" then
+ return nil;
+ end
+
+ recently_queried:add(stranger_jid);
+
+ local version_id = uuid_generate();
+
+ module:hook("iq-result/host/" .. version_id, function (event)
+ module:log("info", "Stranger " .. stranger_jid .. " version: " .. tostring(event.stanza));
+ return true;
+ end);
+
+ module:send(st.iq({ type = "get", to = stranger_jid, from = to_host, id = version_id }):query("jabber:iq:version"));
+
+
+ local disco_id = uuid_generate();
+
+ module:hook("iq-result/host/" .. disco_id, function (event)
+ module:log("info", "Stranger " .. stranger_jid .. " disco: " .. tostring(event.stanza));
+ return true;
+ end);
+
+ module:send(st.iq({ type = "get", to = stranger_jid, from = to_host, id = disco_id }):query("http://jabber.org/protocol/disco#info"));
+ end
+
+ return nil;
+end
+
+module:hook("message/bare", check_subscribed, 225);
+module:hook("message/full", check_subscribed, 225);
+-- Not hooking iqs, as that could turn into infinite loops!