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-rw-r--r--plugins/mod_s2s/mod_s2s.lua189
1 files changed, 88 insertions, 101 deletions
diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua
index f5297efe..f9165f20 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.
--
@@ -15,7 +15,6 @@ 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";
@@ -26,7 +25,6 @@ local s2s_new_incoming = require "core.s2smanager".new_incoming;
local s2s_new_outgoing = require "core.s2smanager".new_outgoing;
local s2s_destroy_session = require "core.s2smanager".destroy_session;
local uuid_gen = require "util.uuid".generate;
-local cert_verify_identity = require "util.x509".verify_identity;
local fire_global_event = prosody.events.fire_event;
local s2sout = module:require("s2sout");
@@ -135,6 +133,12 @@ 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");
@@ -143,15 +147,28 @@ function module.add_host(module)
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);
+ return true;
+ elseif not session.dialback_verifying then
+ session.log("warn", "No SASL EXTERNAL offer and Dialback doesn't seem to be enabled, giving up");
+ session:close();
+ return false;
+ 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
@@ -166,7 +183,7 @@ 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);
@@ -176,7 +193,7 @@ function mark_connected(session)
end
session.sendq = nil;
end
-
+
session.ip_hosts = nil;
session.srv_hosts = nil;
end
@@ -211,14 +228,17 @@ 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)
+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
@@ -226,39 +246,6 @@ local function check_cert_status(session)
cert = conn:getpeercertificate()
end
- if cert then
- 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 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.log or log)("debug", "certificate chain validation result: valid");
- session.cert_chain_status = "valid";
-
- -- We'll go ahead and verify the asserted identity if the
- -- connecting server specified one.
- if host then
- if cert_verify_identity(host, "xmpp-server", cert) then
- session.cert_identity_status = "valid"
- else
- session.cert_identity_status = "invalid"
- end
- (session.log or log)("debug", "certificate identity validation result: %s", session.cert_identity_status);
- end
- end
- end
return module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert });
end
@@ -270,25 +257,28 @@ 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)
@@ -299,7 +289,7 @@ 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
@@ -314,10 +304,10 @@ 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
@@ -352,13 +342,13 @@ function stream_callbacks.streamopened(session, attr)
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 session.ip or "unknown host");
end
-
+
log("debug", "Sending stream features: %s", tostring(features));
send(features);
end
@@ -391,7 +381,7 @@ 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
@@ -484,10 +474,10 @@ local function session_close(session, reason, remote_reason)
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
@@ -505,47 +495,52 @@ local function session_close(session, reason, remote_reason)
end
end
-function session_open_stream(session, from, to)
- 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 or "", to = to or "",
- }
+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("<?xml version='1.0'?>");
- 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.streamid = nil;
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
@@ -557,6 +552,8 @@ 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
@@ -577,26 +574,11 @@ function listener.onconnect(conn)
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)
@@ -605,7 +587,7 @@ 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];
@@ -623,7 +605,6 @@ 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
@@ -632,8 +613,14 @@ 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
@@ -651,7 +638,7 @@ function check_auth_policy(event)
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 14:38:44 +0000