Mercurial > prosody-modules
view mod_muc_ban_ip/mod_muc_ban_ip.lua @ 5536:96dec7681af8
mod_firewall: Update user marks to store instantly via map store
The original approach was to keep marks in memory only, and persist them at
shutdown. That saves I/O, at the cost of potentially losing marks on an
unclean shutdown.
This change persists marks instantly, which may have some performance overhead
but should be more "correct".
It also splits the marking/unmarking into an event which may be watched or
even fired by other modules.
author | Matthew Wild <mwild1@gmail.com> |
---|---|
date | Thu, 08 Jun 2023 16:20:42 +0100 |
parents | 47d9f704d14b |
children |
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module:set_global(); local jid_bare, jid_host = require "util.jid".bare, require "util.jid".host; local st = require "util.stanza"; local xmlns_muc_user = "http://jabber.org/protocol/muc#user"; local trusted_services = module:get_option_inherited_set("muc_ban_ip_trusted_services", {}); local trust_local_restricted_services = module:get_option_boolean("muc_ban_ip_trust_local_restricted_services", true); local ip_bans = module:shared("bans"); local full_sessions = prosody.full_sessions; local function is_local_restricted_service(host) local muc_service = prosody.hosts[host] and prosody.hosts[host].modules.muc; if muc_service and module:context(host):get_option("restrict_room_creation") ~= nil then -- COMPAT: May need updating post-0.12 return true; end return false; end local function ban_ip(session, from) local ip = session.ip; if not ip then module:log("warn", "Failed to ban IP (IP unknown) for %s", session.full_jid); return; end local from_host = jid_host(from); if trusted_services:contains(from_host) or (trust_local_restricted_services and is_local_restricted_service(from_host)) then from = from_host; -- Ban from entire host end local banned_from = ip_bans[ip]; if not banned_from then banned_from = {}; ip_bans[ip] = banned_from; end banned_from[from] = true; module:log("debug", "Added ban for IP address %s from %s", ip, from); end local function check_for_incoming_ban(event) local stanza = event.stanza; local to_session = full_sessions[stanza.attr.to]; if to_session then local directed = to_session.directed; local from = stanza.attr.from; if directed and directed[from] and stanza.attr.type == "unavailable" then -- This is a stanza from somewhere we sent directed presence to (may be a MUC) local x = stanza:get_child("x", xmlns_muc_user); if x then for status in x:childtags("status") do if status.attr.code == '301' then ban_ip(to_session, jid_bare(from)); end end end end end end local function check_for_ban(event) local origin, stanza = event.origin, event.stanza; local ip = origin.ip; local to, to_host = jid_bare(stanza.attr.to), jid_host(stanza.attr.to); if ip_bans[ip] and (ip_bans[ip][to] or ip_bans[ip][to_host]) then (origin.log or module._log)("debug", "IP banned: %s is banned from %s", ip, to) if stanza.attr.type ~= "error" then origin.send(st.error_reply(stanza, "auth", "forbidden") :tag("x", { xmlns = xmlns_muc_user }) :tag("status", { code = '301' })); end return true; end (origin.log or module._log)("debug", "IP not banned: %s from %s", ip, to) end function module.add_host(module) module:hook("presence/full", check_for_incoming_ban, 100); module:hook("pre-presence/full", check_for_ban, 100); end