-- 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.
--
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";
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");
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
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);
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
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);
end
session.sendq = nil;
end
-
+
session.ip_hosts = nil;
session.srv_hosts = nil;
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 "
});
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
return false;
end
session.log("debug", "connection %s->%s is now authenticated for %s", session.from_host, session.to_host, host);
-
+
mark_connected(session);
-
+
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
+ local host = session.direction == "outgoing" and session.to_host or session.from_host
local conn = session.conn:socket()
local cert
if conn.getpeercertificate then
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";
else
session.cert_identity_status = "invalid"
end
+ (session.log or log)("debug", "certificate identity validation result: %s", session.cert_identity_status);
end
end
end
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)
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
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
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");
end
-
+
log("debug", "Sending stream features: %s", tostring(features));
send(features);
end
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
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;
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
session.sends2s("</stream:stream>");
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 </stream:stream> from remote
local conn = session.conn;
if reason == nil and not session.notopen and session.type == "s2sin" then
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',
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
+ if not from or (hosts[from] and hosts[from].modules.dialback) then
attr["xmlns:db"] = 'jabber:server:dialback';
end
local function initialize_session(session)
local stream = new_xmpp_stream(session, stream_callbacks);
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;
function session.data(data)
data = filter("bytes/in", data);
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);
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)
session.data(data);
end
end
-
+
function listener.onstatus(conn, status)
if status == "ssl-handshake-complete" then
local session = sessions[conn];
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
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;
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;
+ 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 secure_auth and not session.cert_identity_status then
+
+ 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);
- session:close(false);
+ 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
projects / prosody.git / blobdiff