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 throttle = require "util.throttle"; local gettime = require "socket".gettime; local max = module:get_option_number("unsolicited_messages_per_minute", 10); local s2s_max = module:get_option_number("unsolicited_s2s_messages_per_minute"); local multiplier = module:get_option_number("throttle_unsolicited_burst", 1); function check_subscribed(event) local stanza, origin = event.stanza, event.origin; local log = origin.log or module._log; if stanza.attr.type == "error" then return end local to_orig = stanza.attr.to; if to_orig == nil or to_orig == origin.full_jid then return end -- to self local to_bare = jid_bare(to_orig); local from_jid = jid_bare(stanza.attr.from); if to_bare == from_jid then return end -- to own resource -- Check if it's a message to a joined room local rooms = origin.rooms_joined; if rooms and rooms[to_bare] then return end -- Retrieve or create throttle object local lim = origin.throttle_unsolicited; if not lim then lim = throttle.create(max * multiplier, 60 * multiplier); origin.throttle_unsolicited = lim; end local to_user, to_host = jid_split(to_orig); if to_user and not is_contact_subscribed(to_user, to_host, from_jid) then log("debug", "[unsolicited] %s is not subscribed to %s@%s", from_jid, to_user, to_host); if not lim:poll(1) then log("warn", "[unsolicited] Sent too many messages to non-contacts, bouncing message"); origin.firewall_mark_unsolicited = gettime(); origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); return true; end end end module:hook("pre-message/bare", check_subscribed, 200); module:hook("pre-message/full", check_subscribed, 200); local full_sessions = prosody.full_sessions; -- Rooms and throttle creation will differ for s2s function check_subscribed_s2s(event) local stanza, origin = event.stanza, event.origin; local log = origin.log or module._log; if origin.type ~= "s2sin" then return end local to_orig = stanza.attr.to; local from_orig = stanza.attr.from; local from_bare = jid_bare(from_orig); local target = full_sessions[to_orig]; if target then local rooms = target.rooms_joined; if rooms and rooms[from_bare] then log("debug", "Message to joined room, no limit"); return end end -- Retrieve or create throttle object local lim = origin.throttle_unsolicited; if not lim then log("debug", "New s2s throttle"); lim = throttle.create(s2s_max * multiplier, 60 * multiplier); origin.throttle_unsolicited = lim; end return check_subscribed(event); end if s2s_max then module:hook("message/bare", check_subscribed_s2s, 200); module:hook("message/full", check_subscribed_s2s, 200); end module:depends("track_muc_joins");