X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=plugins%2Fmod_s2s%2Fmod_s2s.lua;h=e704c25a00c172262ecac5ede188541c6df88258;hb=41ec48760b564924ad75de119a018252d2a8cbcc;hp=512c903772e55c523dce78bf6eedadd1f3f937da;hpb=7eb15e3f95e7b5146d179d56df9b327fe067bb12;p=prosody.git diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua index 512c9037..e704c25a 100644 --- a/plugins/mod_s2s/mod_s2s.lua +++ b/plugins/mod_s2s/mod_s2s.lua @@ -1,7 +1,7 @@ -- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain --- +-- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- @@ -15,6 +15,7 @@ local core_process_stanza = prosody.core_process_stanza; local tostring, type = tostring, type; local t_insert = table.insert; local xpcall, traceback = xpcall, debug.traceback; +local NULL = {}; local add_task = require "util.timer".add_task; local st = require "util.stanza"; @@ -32,11 +33,11 @@ local s2sout = module:require("s2sout"); local connect_timeout = module:get_option_number("s2s_timeout", 90); local stream_close_timeout = module:get_option_number("s2s_close_timeout", 5); - +local opt_keepalives = module:get_option_boolean("s2s_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true)); local secure_auth = module:get_option_boolean("s2s_secure_auth", false); -- One day... local secure_domains, insecure_domains = module:get_option_set("s2s_secure_domains", {})._items, module:get_option_set("s2s_insecure_domains", {})._items; -local require_encryption = module:get_option_boolean("s2s_require_encryption", secure_auth); +local require_encryption = module:get_option_boolean("s2s_require_encryption", false); local sessions = module:shared("sessions"); @@ -80,6 +81,10 @@ function route_to_existing_session(event) log("warn", "Attempt to send stanza from %s - a host we don't serve", from_host); return false; end + if hosts[to_host] then + log("warn", "Attempt to route stanza to a remote %s - a host we do serve?!", from_host); + return false; + end local host = hosts[from_host].s2sout[to_host]; if host then -- We have a connection to this host already @@ -130,23 +135,37 @@ function route_to_new_session(event) return true; end +local function keepalive(event) + return event.session.sends2s(' '); +end + +module:hook("s2s-read-timeout", keepalive, -1); + function module.add_host(module) if module:get_option_boolean("disallow_s2s", false) then module:log("warn", "The 'disallow_s2s' config option is deprecated, please see http://prosody.im/doc/s2s#disabling"); return nil, "This host has disallow_s2s set"; end - module:hook("route/remote", route_to_existing_session, 200); - module:hook("route/remote", route_to_new_session, 100); + module:hook("route/remote", route_to_existing_session, -1); + module:hook("route/remote", route_to_new_session, -10); module:hook("s2s-authenticated", make_authenticated, -1); + module:hook("s2s-read-timeout", keepalive, -1); + module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza) + if session.type == "s2sout" then + -- Stream is authenticated and we are seem to be done with feature negotiation, + -- so the stream is ready for stanzas. RFC 6120 Section 4.3 + mark_connected(session); + end + end, -1); end -- Stream is authorised, and ready for normal stanzas function mark_connected(session) local sendq, send = session.sendq, session.sends2s; - + local from, to = session.from_host, session.to_host; - - session.log("info", "%s s2s connection %s->%s complete", session.direction, from, to); + + session.log("info", "%s s2s connection %s->%s complete", session.direction:gsub("^.", string.upper), from, to); local event_data = { session = session }; if session.type == "s2sout" then @@ -161,7 +180,7 @@ function mark_connected(session) fire_global_event("s2sin-established", event_data); hosts[to].events.fire_event("s2sin-established", event_data); end - + if session.direction == "outgoing" then if sendq then session.log("debug", "sending %d queued stanzas across new outgoing connection to %s", #sendq, session.to_host); @@ -171,7 +190,7 @@ function mark_connected(session) end session.sendq = nil; end - + session.ip_hosts = nil; session.srv_hosts = nil; end @@ -180,7 +199,7 @@ end function make_authenticated(event) local session, host = event.session, event.host; if not session.secure then - if require_encryption or secure_auth or secure_domains[host] then + if require_encryption or (secure_auth and not(insecure_domains[host])) or secure_domains[host] then session:close({ condition = "policy-violation", text = "Encrypted server-to-server communication is required but was not " @@ -188,6 +207,9 @@ function make_authenticated(event) }); end end + if hosts[host] then + session:close({ condition = "undefined-condition", text = "Attempt to authenticate as a host we serve" }); + end if session.type == "s2sout_unauthed" then session.type = "s2sout"; elseif session.type == "s2sin_unauthed" then @@ -203,15 +225,18 @@ function make_authenticated(event) return false; end session.log("debug", "connection %s->%s is now authenticated for %s", session.from_host, session.to_host, host); - - mark_connected(session); - + + if (session.type == "s2sout" and session.external_auth ~= "succeeded") or session.type == "s2sin" then + -- Stream either used dialback for authentication or is an incoming stream. + mark_connected(session); + end + return true; end --- Helper to check that a session peer's certificate is valid -local function check_cert_status(session) - local host = session.direction == "incoming" and session.from_host or session.to_host +function check_cert_status(session) + local host = session.direction == "outgoing" and session.to_host or session.from_host local conn = session.conn:socket() local cert if conn.getpeercertificate then @@ -219,11 +244,19 @@ local function check_cert_status(session) end if cert then - local chain_valid, errors = conn:getpeerverification() + local chain_valid, errors; + if conn.getpeerverification then + chain_valid, errors = conn:getpeerverification(); + elseif conn.getpeerchainvalid then -- COMPAT mw/luasec-hg + chain_valid, errors = conn:getpeerchainvalid(); + errors = (not chain_valid) and { { errors } } or nil; + else + chain_valid, errors = false, { { "Chain verification not supported by this version of LuaSec" } }; + end -- Is there any interest in printing out all/the number of errors here? if not chain_valid then (session.log or log)("debug", "certificate chain validation result: invalid"); - for depth, t in ipairs(errors) do + for depth, t in pairs(errors or NULL) do (session.log or log)("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", ")) end session.cert_chain_status = "invalid"; @@ -239,6 +272,7 @@ local function check_cert_status(session) else session.cert_identity_status = "invalid" end + (session.log or log)("debug", "certificate identity validation result: %s", session.cert_identity_status); end end end @@ -253,25 +287,28 @@ local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams"; function stream_callbacks.streamopened(session, attr) local send = session.sends2s; - + session.version = tonumber(attr.version) or 0; - + -- TODO: Rename session.secure to session.encrypted if session.secure == false then session.secure = true; + session.encrypted = true; - -- Check if TLS compression is used local sock = session.conn:socket(); if sock.info then - session.compressed = sock:info"compression"; - elseif sock.compression then - session.compressed = sock:compression(); --COMPAT mw/luasec-hg + local info = sock:info(); + (session.log or log)("info", "Stream encrypted (%s with %s)", info.protocol, info.cipher); + session.compressed = info.compression; + else + (session.log or log)("info", "Stream encrypted"); + session.compressed = sock.compression and sock:compression(); --COMPAT mw/luasec-hg end end if session.direction == "incoming" then -- Send a reply stream header - + -- Validate to/from local to, from = nameprep(attr.to), nameprep(attr.from); if not to and attr.to then -- COMPAT: Some servers do not reliably set 'to' (especially on stream restarts) @@ -282,7 +319,7 @@ function stream_callbacks.streamopened(session, attr) session:close({ condition = "improper-addressing", text = "Invalid 'from' address" }); return; end - + -- Set session.[from/to]_host if they have not been set already and if -- this session isn't already authenticated if session.type == "s2sin_unauthed" and from and not session.from_host then @@ -297,10 +334,10 @@ function stream_callbacks.streamopened(session, attr) session:close({ condition = "improper-addressing", text = "New stream 'to' attribute does not match original" }); return; end - + -- For convenience we'll put the sanitised values into these variables to, from = session.to_host, session.from_host; - + session.streamid = uuid_gen(); (session.log or log)("debug", "Incoming s2s received %s", st.stanza("stream:stream", attr):top_tag()); if to then @@ -321,22 +358,27 @@ function stream_callbacks.streamopened(session, attr) end end + if hosts[from] then + session:close({ condition = "undefined-condition", text = "Attempt to connect from a host we serve" }); + return; + end + if session.secure and not session.cert_chain_status then if check_cert_status(session) == false then return; end end - session:open_stream() + session:open_stream(session.to_host, session.from_host) if session.version >= 1.0 then local features = st.stanza("stream:features"); - + if to then hosts[to].events.fire_event("s2s-stream-features", { origin = session, features = features }); else - (session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", from or "unknown host"); + (session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", from or session.ip or "unknown host"); end - + log("debug", "Sending stream features: %s", tostring(features)); send(features); end @@ -364,7 +406,7 @@ function stream_callbacks.streamopened(session, attr) end end session.send_buffer = nil; - + -- If server is pre-1.0, don't wait for features, just do dialback if session.version < 1.0 then if not session.dialback_verifying then @@ -408,7 +450,7 @@ function stream_callbacks.error(session, error, data) end end -local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end +local function handleerr(err) log("error", "Traceback[s2s]: %s", traceback(tostring(err), 2)); end function stream_callbacks.handlestanza(session, stanza) if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client stanza.attr.xmlns = nil; @@ -423,16 +465,19 @@ local listener = {}; --- Session methods local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; -local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; local function session_close(session, reason, remote_reason) local log = session.log or log; if session.conn then if session.notopen then - session:open_stream() + if session.direction == "incoming" then + session:open_stream(session.to_host, session.from_host); + else + session:open_stream(session.from_host, session.to_host); + end end if reason then -- nil == no err, initiated by us, false == initiated by remote if type(reason) == "string" then -- assume stream error - log("debug", "Disconnecting %s[%s], is: %s", session.host or "(unknown host)", session.type, reason); + log("debug", "Disconnecting %s[%s], is: %s", session.host or session.ip or "(unknown host)", session.type, reason); session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); elseif type(reason) == "table" then if reason.condition then @@ -443,7 +488,7 @@ local function session_close(session, reason, remote_reason) if reason.extra then stanza:add_child(reason.extra); end - log("debug", "Disconnecting %s[%s], is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); + log("debug", "Disconnecting %s[%s], is: %s", session.host or session.ip or "(unknown host)", session.type, tostring(stanza)); session.sends2s(stanza); elseif reason.name then -- a stanza log("debug", "Disconnecting %s->%s[%s], is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason)); @@ -454,10 +499,10 @@ local function session_close(session, reason, remote_reason) session.sends2s(""); function session.sends2s() return false; end - + local reason = remote_reason or (reason and (reason.text or reason.condition)) or reason; - session.log("info", "%s s2s stream %s->%s closed: %s", session.direction, session.from_host or "(unknown host)", session.to_host or "(unknown host)", reason or "stream closed"); - + session.log("info", "%s s2s stream %s->%s closed: %s", session.direction:gsub("^.", string.upper), session.from_host or "(unknown host)", session.to_host or "(unknown host)", reason or "stream closed"); + -- Authenticated incoming stream may still be sending us stanzas, so wait for from remote local conn = session.conn; if reason == nil and not session.notopen and session.type == "s2sin" then @@ -475,49 +520,51 @@ local function session_close(session, reason, remote_reason) end end -function session_open_stream(session, from, to) - local from = from or session.from_host; - local to = to or session.to_host; - local attr = { - ["xmlns:stream"] = 'http://etherx.jabber.org/streams', - xmlns = 'jabber:server', - version = session.version and (session.version > 0 and "1.0" or nil), - ["xml:lang"] = 'en', - id = session.streamid, - from = from, to = to, - } - local local_host = session.direction == "outgoing" and from or to; - if not local_host or hosts[local_host].modules.dialback then +function session_stream_attrs(session, from, to, attr) + if not from or (hosts[from] and hosts[from].modules.dialback) then attr["xmlns:db"] = 'jabber:server:dialback'; end - - session.sends2s(""); - session.sends2s(st.stanza("stream:stream", attr):top_tag()); - return true; end -- Session initialization logic shared by incoming and outgoing local function initialize_session(session) local stream = new_xmpp_stream(session, stream_callbacks); + local log = session.log or log; session.stream = stream; - + session.notopen = true; - + function session.reset_stream() session.notopen = true; session.stream:reset(); end - session.open_stream = session_open_stream; - - local filter = session.filter; + session.stream_attrs = session_stream_attrs; + + local filter = initialize_filters(session); + local conn = session.conn; + local w = conn.write; + + function session.sends2s(t) + log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^[^>]*>?")); + if t.name then + t = filter("stanzas/out", t); + end + if t then + t = filter("bytes/out", tostring(t)); + if t then + return w(conn, t); + end + end + end + function session.data(data) data = filter("bytes/in", data); if data then local ok, err = stream:feed(data); if ok then return; end - (session.log or log)("warn", "Received invalid XML: %s", data); - (session.log or log)("warn", "Problem was: %s", err); + log("warn", "Received invalid XML: %s", data); + log("warn", "Problem was: %s", err); session:close("not-well-formed"); end end @@ -529,6 +576,8 @@ local function initialize_session(session) return handlestanza(session, stanza); end + module:fire_event("s2s-created", { session = session }); + add_task(connect_timeout, function () if session.type == "s2sin" or session.type == "s2sout" then return; -- Ok, we're connected @@ -543,31 +592,17 @@ local function initialize_session(session) end function listener.onconnect(conn) + conn:setoption("keepalive", opt_keepalives); local session = sessions[conn]; if not session then -- New incoming connection session = s2s_new_incoming(conn); sessions[conn] = session; session.log("debug", "Incoming s2s connection"); - - local filter = initialize_filters(session); - local w = conn.write; - session.sends2s = function (t) - log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^([^>]*>?)")); - if t.name then - t = filter("stanzas/out", t); - end - if t then - t = filter("bytes/out", tostring(t)); - if t then - return w(conn, t); - end - end - end - initialize_session(session); else -- Outgoing session connected session:open_stream(session.from_host, session.to_host); end + session.ip = conn:ip(); end function listener.onincoming(conn, data) @@ -576,7 +611,7 @@ function listener.onincoming(conn, data) session.data(data); end end - + function listener.onstatus(conn, status) if status == "ssl-handshake-complete" then local session = sessions[conn]; @@ -594,7 +629,6 @@ function listener.ondisconnect(conn, err) if err and session.direction == "outgoing" and session.notopen then (session.log or log)("debug", "s2s connection attempt failed: %s", err); if s2sout.attempt_connection(session, err) then - (session.log or log)("debug", "...so we're going to try another target"); return; -- Session lives for now end end @@ -603,24 +637,35 @@ function listener.ondisconnect(conn, err) end end +function listener.onreadtimeout(conn) + local session = sessions[conn]; + if session then + return (hosts[session.host] or prosody).events.fire_event("s2s-read-timeout", { session = session }); + end +end + function listener.register_outgoing(conn, session) - session.direction = "outgoing"; sessions[conn] = session; initialize_session(session); end function check_auth_policy(event) local host, session = event.host, event.session; - - if not secure_auth and secure_domains[host] then - secure_auth = true; - elseif secure_auth and insecure_domains[host] then - secure_auth = false; - end - - if secure_auth and not session.cert_identity_status then - module:log("warn", "Forbidding insecure connection to/from %s", host); - session:close(false); + local must_secure = secure_auth; + + if not must_secure and secure_domains[host] then + must_secure = true; + elseif must_secure and insecure_domains[host] then + must_secure = false; + end + + if must_secure and (session.cert_chain_status ~= "valid" or session.cert_identity_status ~= "valid") then + module:log("warn", "Forbidding insecure connection to/from %s", host or session.ip or "(unknown host)"); + if session.direction == "incoming" then + session:close({ condition = "not-authorized", text = "Your server's certificate is invalid, expired, or not trusted by "..session.to_host }); + else -- Close outgoing connections without warning + session:close(false); + end return false; end end