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-rw-r--r--plugins/mod_s2s/mod_s2s.lua749
-rw-r--r--plugins/mod_s2s/s2sout.lib.lua349
2 files changed, 0 insertions, 1098 deletions
diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua
deleted file mode 100644
index c3de28db..00000000
--- a/plugins/mod_s2s/mod_s2s.lua
+++ /dev/null
@@ -1,749 +0,0 @@
--- 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.
---
-
-module:set_global();
-
-local prosody = prosody;
-local hosts = prosody.hosts;
-local core_process_stanza = prosody.core_process_stanza;
-
-local tostring, type = tostring, type;
-local t_insert = table.insert;
-local traceback = debug.traceback;
-
-local add_task = require "util.timer".add_task;
-local st = require "util.stanza";
-local initialize_filters = require "util.filters".initialize;
-local nameprep = require "util.encodings".stringprep.nameprep;
-local new_xmpp_stream = require "util.xmppstream".new;
-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 fire_global_event = prosody.events.fire_event;
-local runner = require "util.async".runner;
-
-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", false);
-local stanza_size_limit = module:get_option_number("s2s_stanza_size_limit", 1024*512);
-
-local measure_connections = module:measure("connections", "amount");
-local measure_ipv6 = module:measure("ipv6", "amount");
-
-local sessions = module:shared("sessions");
-
-local runner_callbacks = {};
-
-local log = module._log;
-
-module:hook("stats-update", function ()
- local count = 0;
- local ipv6 = 0;
- for _, session in pairs(sessions) do
- count = count + 1;
- if session.ip and session.ip:match(":") then
- ipv6 = ipv6 + 1;
- end
- end
- measure_connections(count);
- measure_ipv6(ipv6);
-end);
-
---- Handle stanzas to remote domains
-
-local bouncy_stanzas = { message = true, presence = true, iq = true };
-local function bounce_sendq(session, reason)
- local sendq = session.sendq;
- if not sendq then return; end
- session.log("info", "Sending error replies for %d queued stanzas because of failed outgoing connection to %s", #sendq, session.to_host);
- local dummy = {
- type = "s2sin";
- send = function ()
- (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", traceback());
- end;
- dummy = true;
- close = function ()
- (session.log or log)("error", "Attempting to close the dummy origin of s2s error replies, please report this! Traceback: %s", traceback());
- end;
- };
- for i, data in ipairs(sendq) do
- local reply = data[2];
- if reply and not(reply.attr.xmlns) and bouncy_stanzas[reply.name] then
- reply.attr.type = "error";
- reply:tag("error", {type = "cancel", by = session.from_host})
- :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
- if reason then
- reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"})
- :text("Server-to-server connection failed: "..reason):up();
- end
- core_process_stanza(dummy, reply);
- end
- sendq[i] = nil;
- end
- session.sendq = nil;
-end
-
--- Handles stanzas to existing s2s sessions
-function route_to_existing_session(event)
- local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
- if not hosts[from_host] then
- 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
- if host.type == "s2sout_unauthed" and (stanza.name ~= "db:verify" or not host.dialback_key) then
- (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host);
-
- -- Queue stanza until we are able to send it
- local queued_item = {
- tostring(stanza),
- stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza);
- };
- if host.sendq then
- t_insert(host.sendq, queued_item);
- else
- -- luacheck: ignore 122
- host.sendq = { queued_item };
- end
- host.log("debug", "stanza [%s] queued ", stanza.name);
- return true;
- elseif host.type == "local" or host.type == "component" then
- log("error", "Trying to send a stanza to ourselves??")
- log("error", "Traceback: %s", traceback());
- log("error", "Stanza: %s", tostring(stanza));
- return false;
- else
- -- FIXME
- if host.from_host ~= from_host then
- log("error", "WARNING! This might, possibly, be a bug, but it might not...");
- log("error", "We are going to send from %s instead of %s", host.from_host, from_host);
- end
- if host.sends2s(stanza) then
- return true;
- end
- end
- end
-end
-
--- Create a new outgoing session for a stanza
-function route_to_new_session(event)
- local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
- log("debug", "opening a new outgoing connection for this stanza");
- local host_session = s2s_new_outgoing(from_host, to_host);
-
- -- Store in buffer
- host_session.bounce_sendq = bounce_sendq;
- host_session.sendq = { {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} };
- log("debug", "stanza [%s] queued until connection complete", tostring(stanza.name));
- s2sout.initiate_connection(host_session);
- if (not host_session.connecting) and (not host_session.conn) then
- log("warn", "Connection to %s failed already, destroying session...", to_host);
- s2s_destroy_session(host_session, "Connection failed");
- return false;
- end
- return true;
-end
-
-local function keepalive(event)
- local session = event.session;
- if not session.notopen then
- return event.session.sends2s(' ');
- end
-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 https://prosody.im/doc/s2s#disabling");
- return nil, "This host has disallow_s2s set";
- end
- 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) -- luacheck: ignore 212/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 = session.sendq;
-
- local from, to = session.from_host, session.to_host;
-
- 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("s2sout-established", event_data);
- hosts[from].events.fire_event("s2sout-established", event_data);
- else
- local host_session = hosts[to];
- session.send = function(stanza)
- return host_session.events.fire_event("route/remote", { from_host = to, to_host = from, stanza = stanza });
- end;
-
- 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);
- local send = session.sends2s;
- for i, data in ipairs(sendq) do
- send(data[1]);
- sendq[i] = nil;
- end
- session.sendq = nil;
- end
-
- if session.resolver then
- session.resolver._resolver:closeall()
- end
- session.resolver = nil;
- session.ip_hosts = nil;
- session.srv_hosts = nil;
- end
-end
-
-function make_authenticated(event)
- local session, host = event.session, event.host;
- if not session.secure 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 "
- ..((session.direction == "outgoing" and "offered") or "used")
- });
- 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
- session.type = "s2sin";
- if host then
- if not session.hosts[host] then session.hosts[host] = {}; end
- session.hosts[host].authed = true;
- end
- elseif session.type == "s2sin" and host then
- if not session.hosts[host] then session.hosts[host] = {}; end
- session.hosts[host].authed = true;
- else
- return false;
- end
- session.log("debug", "connection %s->%s is now authenticated for %s", session.from_host, session.to_host, host);
-
- 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 == "outgoing" and session.to_host or session.from_host
- local conn = session.conn:socket()
- local cert
- if conn.getpeercertificate then
- cert = conn:getpeercertificate()
- end
-
- return module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert });
-end
-
---- XMPP stream event handlers
-
-local stream_callbacks = { default_ns = "jabber:server" };
-
-function stream_callbacks.handlestanza(session, stanza)
- stanza = session.filter("stanzas/in", stanza);
- session.thread:run(stanza);
-end
-
-local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
-
-function stream_callbacks.streamopened(session, attr)
- -- run _streamopened in async context
- session.thread:run({ attr = attr });
-end
-
-function stream_callbacks._streamopened(session, attr)
- 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;
-
- local sock = session.conn:socket();
- if sock.info then
- 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 'to' address" });
- return;
- end
- if not from and attr.from then -- COMPAT: Some servers do not reliably set 'from' (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.from_host = from;
- elseif from ~= session.from_host then
- session:close({ condition = "improper-addressing", text = "New stream 'from' attribute does not match original" });
- return;
- end
- if session.type == "s2sin_unauthed" and to and not session.to_host then
- session.to_host = to;
- elseif to ~= session.to_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
- if not hosts[to] then
- -- Attempting to connect to a host we don't serve
- session:close({
- condition = "host-unknown";
- text = "This host does not serve "..to
- });
- return;
- elseif not hosts[to].modules.s2s then
- -- Attempting to connect to a host that disallows s2s
- session:close({
- condition = "policy-violation";
- text = "Server-to-server communication is disabled for this host";
- });
- return;
- 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.to_host, session.from_host)
- session.notopen = nil;
- 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");
- fire_global_event("s2s-stream-features-legacy", { origin = session, features = features });
- end
-
- if ( session.type == "s2sin" or session.type == "s2sout" ) or features.tags[1] then
- log("debug", "Sending stream features: %s", features);
- session.sends2s(features);
- else
- (session.log or log)("warn", "No stream features to offer, giving up");
- session:close({ condition = "undefined-condition", text = "No stream features to offer" });
- end
- end
- elseif session.direction == "outgoing" then
- session.notopen = nil;
- if not attr.id then
- log("warn", "Stream response did not give us a stream id!");
- session:close({ condition = "undefined-condition", text = "Missing stream ID" });
- return;
- end
- session.streamid = attr.id;
-
- if session.secure and not session.cert_chain_status then
- if check_cert_status(session) == false then
- return;
- end
- end
-
- -- Send unauthed buffer
- -- (stanzas which are fine to send before dialback)
- -- Note that this is *not* the stanza queue (which
- -- we can only send if auth succeeds) :)
- local send_buffer = session.send_buffer;
- if send_buffer and #send_buffer > 0 then
- log("debug", "Sending s2s send_buffer now...");
- for i, data in ipairs(send_buffer) do
- session.sends2s(tostring(data));
- send_buffer[i] = nil;
- 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
- hosts[session.from_host].events.fire_event("s2sout-authenticate-legacy", { origin = session });
- else
- mark_connected(session);
- end
- end
- end
-end
-
-function stream_callbacks.streamclosed(session)
- (session.log or log)("debug", "Received </stream:stream>");
- session:close(false);
-end
-
-function stream_callbacks.error(session, error, data)
- if error == "no-stream" then
- session.log("debug", "Invalid opening stream header (%s)", (data:gsub("^([^\1]+)\1", "{%1}")));
- session:close("invalid-namespace");
- elseif error == "parse-error" then
- session.log("debug", "Server-to-server XML parse error: %s", error);
- session:close("not-well-formed");
- elseif error == "stream-error" then
- local condition, text = "undefined-condition";
- for child in data:childtags(nil, xmlns_xmpp_streams) do
- if child.name ~= "text" then
- condition = child.name;
- else
- text = child:get_text();
- end
- if condition ~= "undefined-condition" and text then
- break;
- end
- end
- text = condition .. (text and (" ("..text..")") or "");
- session.log("info", "Session closed by remote with error: %s", text);
- session:close(nil, text);
- end
-end
-
-local listener = {};
-
---- Session methods
-local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
-local function session_close(session, reason, remote_reason)
- local log = session.log or log;
- if session.conn then
- if session.notopen then
- 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], <stream:error> 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
- local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
- if reason.text then
- stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
- end
- if reason.extra then
- stanza:add_child(reason.extra);
- end
- log("debug", "Disconnecting %s[%s], <stream:error> is: %s",
- session.host or session.ip or "(unknown host)", session.type, stanza);
- session.sends2s(stanza);
- elseif reason.name then -- a stanza
- log("debug", "Disconnecting %s->%s[%s], <stream:error> is: %s",
- session.from_host or "(unknown host)", session.to_host or "(unknown host)",
- session.type, reason);
- session.sends2s(reason);
- end
- end
- end
-
- session.sends2s("</stream:stream>");
- function session.sends2s() return false; end
-
- -- luacheck: ignore 422/reason
- -- FIXME reason should be managed in a place common to c2s, s2s, bosh, component etc
- 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: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
- add_task(stream_close_timeout, function ()
- if not session.destroyed then
- session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
- s2s_destroy_session(session, reason);
- conn:close();
- end
- end);
- else
- s2s_destroy_session(session, reason);
- conn:close(); -- Close immediately, as this is an outgoing connection or is not authed
- end
- end
-end
-
-function session_stream_attrs(session, from, to, attr) -- luacheck: ignore 212/session
- if not from or (hosts[from] and hosts[from].modules.dialback) then
- attr["xmlns:db"] = 'jabber:server:dialback';
- end
- if not from then
- attr.from = '';
- end
- if not to then
- attr.to = '';
- end
-end
-
--- Session initialization logic shared by incoming and outgoing
-local function initialize_session(session)
- local stream = new_xmpp_stream(session, stream_callbacks, stanza_size_limit);
-
- session.thread = runner(function (stanza)
- if stanza.name == nil then
- stream_callbacks._streamopened(session, stanza.attr);
- else
- core_process_stanza(session, stanza);
- end
- end, runner_callbacks, session);
-
- 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.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]: %s", session.type, 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
- log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
- session:close("not-well-formed");
- end
- end
-
- session.close = session_close;
-
- local handlestanza = stream_callbacks.handlestanza;
- function session.dispatch_stanza(session, stanza) -- luacheck: ignore 432/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
- elseif session.type == "s2s_destroyed" then
- return; -- Session already destroyed
- end
- -- Not connected, need to close session and clean up
- (session.log or log)("debug", "Destroying incomplete session %s->%s due to inactivity",
- session.from_host or "(unknown)", session.to_host or "(unknown)");
- session:close("connection-timeout");
- end);
-end
-
-function runner_callbacks:ready()
- self.data.log("debug", "Runner %s ready (%s)", self.thread, coroutine.status(self.thread));
- self.data.conn:resume();
-end
-
-function runner_callbacks:waiting()
- self.data.log("debug", "Runner %s waiting (%s)", self.thread, coroutine.status(self.thread));
- self.data.conn:pause();
-end
-
-function runner_callbacks:error(err)
- (self.data.log or log)("error", "Traceback[s2s]: %s", err);
-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");
- 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)
- local session = sessions[conn];
- if session then
- session.data(data);
- end
-end
-
-function listener.onstatus(conn, status)
- if status == "ssl-handshake-complete" then
- local session = sessions[conn];
- if session and session.direction == "outgoing" then
- session.log("debug", "Sending stream header...");
- session:open_stream(session.from_host, session.to_host);
- end
- end
-end
-
-function listener.ondisconnect(conn, err)
- local session = sessions[conn];
- if session then
- sessions[conn] = nil;
- 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
- return; -- Session lives for now
- end
- end
- (session.log or log)("debug", "s2s disconnected: %s->%s (%s)", session.from_host, session.to_host, err or "connection closed");
- s2s_destroy_session(session, err);
- end
-end
-
-function listener.onreadtimeout(conn)
- local session = sessions[conn];
- if session then
- local host = session.host or session.to_host;
- return (hosts[host] or prosody).events.fire_event("s2s-read-timeout", { session = session });
- end
-end
-
-function listener.register_outgoing(conn, session)
- sessions[conn] = session;
- initialize_session(session);
-end
-
-function listener.ondetach(conn)
- sessions[conn] = nil;
-end
-
-function check_auth_policy(event)
- local host, session = event.host, event.session;
- 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
-
-module:hook("s2s-check-certificate", check_auth_policy, -1);
-
-s2sout.set_listener(listener);
-
-module:hook("server-stopping", function(event)
- local reason = event.reason;
- for _, session in pairs(sessions) do
- session:close{ condition = "system-shutdown", text = reason };
- end
-end, -200);
-
-
-
-module:provides("net", {
- name = "s2s";
- listener = listener;
- default_port = 5269;
- encryption = "starttls";
- multiplex = {
- pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:server%1.*>";
- };
-});
-
diff --git a/plugins/mod_s2s/s2sout.lib.lua b/plugins/mod_s2s/s2sout.lib.lua
deleted file mode 100644
index 5f765da8..00000000
--- a/plugins/mod_s2s/s2sout.lib.lua
+++ /dev/null
@@ -1,349 +0,0 @@
--- 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.
---
-
---- Module containing all the logic for connecting to a remote server
-
--- luacheck: ignore 432/err
-
-local portmanager = require "core.portmanager";
-local wrapclient = require "net.server".wrapclient;
-local initialize_filters = require "util.filters".initialize;
-local idna_to_ascii = require "util.encodings".idna.to_ascii;
-local new_ip = require "util.ip".new_ip;
-local rfc6724_dest = require "util.rfc6724".destination;
-local socket = require "socket";
-local adns = require "net.adns";
-local t_insert, t_sort, ipairs = table.insert, table.sort, ipairs;
-local local_addresses = require "util.net".local_addresses;
-
-local s2s_destroy_session = require "core.s2smanager".destroy_session;
-
-local default_mode = module:get_option("network_default_read_size", 4096);
-
-local log = module._log;
-
-local sources = {};
-local has_ipv4, has_ipv6;
-
-local dns_timeout = module:get_option_number("dns_timeout", 15);
-local resolvers = module:get_option_set("s2s_dns_resolvers")
-
-local s2sout = {};
-
-local s2s_listener;
-
-
-function s2sout.set_listener(listener)
- s2s_listener = listener;
-end
-
-local function compare_srv_priorities(a,b)
- return a.priority < b.priority or (a.priority == b.priority and a.weight > b.weight);
-end
-
-function s2sout.initiate_connection(host_session)
- local log = host_session.log or log;
-
- initialize_filters(host_session);
- host_session.version = 1;
-
- host_session.resolver = adns.resolver();
- host_session.resolver._resolver:settimeout(dns_timeout);
- if resolvers then
- for resolver in resolvers do
- host_session.resolver._resolver:addnameserver(resolver);
- end
- end
-
- -- Kick the connection attempting machine into life
- if not s2sout.attempt_connection(host_session) then
- -- Intentionally not returning here, the
- -- session is needed, connected or not
- s2s_destroy_session(host_session);
- end
-
- if not host_session.sends2s then
- -- A sends2s which buffers data (until the stream is opened)
- -- note that data in this buffer will be sent before the stream is authed
- -- and will not be ack'd in any way, successful or otherwise
- local buffer;
- function host_session.sends2s(data)
- if not buffer then
- buffer = {};
- host_session.send_buffer = buffer;
- end
- log("debug", "Buffering data on unconnected s2sout to %s", host_session.to_host);
- buffer[#buffer+1] = data;
- log("debug", "Buffered item %d: %s", #buffer, data);
- end
- end
-end
-
-function s2sout.attempt_connection(host_session, err)
- local to_host = host_session.to_host;
- local connect_host, connect_port = to_host and idna_to_ascii(to_host), 5269;
- local log = host_session.log or log;
-
- if not connect_host then
- return false;
- end
-
- if not err then -- This is our first attempt
- log("debug", "First attempt to connect to %s, starting with SRV lookup...", to_host);
- host_session.connecting = true;
- host_session.resolver:lookup(function (answer)
- local srv_hosts = { answer = answer };
- host_session.srv_hosts = srv_hosts;
- host_session.srv_choice = 0;
- host_session.connecting = nil;
- if answer and #answer > 0 then
- log("debug", "%s has SRV records, handling...", to_host);
- for _, record in ipairs(answer) do
- t_insert(srv_hosts, record.srv);
- end
- if #srv_hosts == 1 and srv_hosts[1].target == "." then
- log("debug", "%s does not provide a XMPP service", to_host);
- s2s_destroy_session(host_session, err); -- Nothing to see here
- return;
- end
- t_sort(srv_hosts, compare_srv_priorities);
-
- local srv_choice = srv_hosts[1];
- host_session.srv_choice = 1;
- if srv_choice then
- connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port;
- log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port);
- end
- else
- log("debug", "%s has no SRV records, falling back to A/AAAA", to_host);
- end
- -- Try with SRV, or just the plain hostname if no SRV
- local ok, err = s2sout.try_connect(host_session, connect_host, connect_port);
- if not ok then
- if not s2sout.attempt_connection(host_session, err) then
- -- No more attempts will be made
- s2s_destroy_session(host_session, err);
- end
- end
- end, "_xmpp-server._tcp."..connect_host..".", "SRV");
-
- return true; -- Attempt in progress
- elseif host_session.ip_hosts then
- return s2sout.try_connect(host_session, connect_host, connect_port, err);
- elseif host_session.srv_hosts and #host_session.srv_hosts > host_session.srv_choice then -- Not our first attempt, and we also have SRV
- host_session.srv_choice = host_session.srv_choice + 1;
- local srv_choice = host_session.srv_hosts[host_session.srv_choice];
- connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port;
- host_session.log("info", "Connection failed (%s). Attempt #%d: This time to %s:%d", err, host_session.srv_choice, connect_host, connect_port);
- else
- host_session.log("info", "Failed in all attempts to connect to %s", host_session.to_host);
- -- We're out of options
- return false;
- end
-
- if not (connect_host and connect_port) then
- -- Likely we couldn't resolve DNS
- log("warn", "Hmm, we're without a host (%s) and port (%s) to connect to for %s, giving up :(", connect_host, connect_port, to_host);
- return false;
- end
-
- return s2sout.try_connect(host_session, connect_host, connect_port);
-end
-
-function s2sout.try_next_ip(host_session)
- host_session.connecting = nil;
- host_session.ip_choice = host_session.ip_choice + 1;
- local ip = host_session.ip_hosts[host_session.ip_choice];
- local ok, err= s2sout.make_connect(host_session, ip.ip, ip.port);
- if not ok then
- if not s2sout.attempt_connection(host_session, err or "closed") then
- err = err and (": "..err) or "";
- s2s_destroy_session(host_session, "Connection failed"..err);
- end
- end
-end
-
-function s2sout.try_connect(host_session, connect_host, connect_port, err)
- host_session.connecting = true;
- local log = host_session.log or log;
-
- if not err then
- local IPs = {};
- host_session.ip_hosts = IPs;
- -- luacheck: ignore 231/handle4 231/handle6
- local handle4, handle6;
- local have_other_result = not(has_ipv4) or not(has_ipv6) or false;
-
- if has_ipv4 then
- handle4 = host_session.resolver:lookup(function (reply, err)
- handle4 = nil;
-
- if reply and reply[#reply] and reply[#reply].a then
- for _, ip in ipairs(reply) do
- log("debug", "DNS reply for %s gives us %s", connect_host, ip.a);
- IPs[#IPs+1] = new_ip(ip.a, "IPv4");
- end
- elseif err then
- log("debug", "Error in DNS lookup: %s", err);
- end
-
- if have_other_result then
- if #IPs > 0 then
- rfc6724_dest(host_session.ip_hosts, sources);
- for i = 1, #IPs do
- IPs[i] = {ip = IPs[i], port = connect_port};
- end
- host_session.ip_choice = 0;
- s2sout.try_next_ip(host_session);
- else
- log("debug", "DNS lookup failed to get a response for %s", connect_host);
- host_session.ip_hosts = nil;
- if not s2sout.attempt_connection(host_session, "name resolution failed") then -- Retry if we can
- log("debug", "No other records to try for %s - destroying", host_session.to_host);
- err = err and (": "..err) or "";
- s2s_destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't
- end
- end
- else
- have_other_result = true;
- end
- end, connect_host, "A", "IN");
- else
- have_other_result = true;
- end
-
- if has_ipv6 then
- handle6 = host_session.resolver:lookup(function (reply, err)
- handle6 = nil;
-
- if reply and reply[#reply] and reply[#reply].aaaa then
- for _, ip in ipairs(reply) do
- log("debug", "DNS reply for %s gives us %s", connect_host, ip.aaaa);
- IPs[#IPs+1] = new_ip(ip.aaaa, "IPv6");
- end
- elseif err then
- log("debug", "Error in DNS lookup: %s", err);
- end
-
- if have_other_result then
- if #IPs > 0 then
- rfc6724_dest(host_session.ip_hosts, sources);
- for i = 1, #IPs do
- IPs[i] = {ip = IPs[i], port = connect_port};
- end
- host_session.ip_choice = 0;
- s2sout.try_next_ip(host_session);
- else
- log("debug", "DNS lookup failed to get a response for %s", connect_host);
- host_session.ip_hosts = nil;
- if not s2sout.attempt_connection(host_session, "name resolution failed") then -- Retry if we can
- log("debug", "No other records to try for %s - destroying", host_session.to_host);
- err = err and (": "..err) or "";
- s2s_destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't
- end
- end
- else
- have_other_result = true;
- end
- end, connect_host, "AAAA", "IN");
- else
- have_other_result = true;
- end
- return true;
- elseif host_session.ip_hosts and #host_session.ip_hosts > host_session.ip_choice then -- Not our first attempt, and we also have IPs left to try
- s2sout.try_next_ip(host_session);
- else
- log("debug", "Out of IP addresses, trying next SRV record (if any)");
- host_session.ip_hosts = nil;
- if not s2sout.attempt_connection(host_session, "out of IP addresses") then -- Retry if we can
- log("debug", "No other records to try for %s - destroying", host_session.to_host);
- err = err and (": "..err) or "";
- s2s_destroy_session(host_session, "Connecting failed"..err); -- End of the line, we can't
- return false;
- end
- end
-
- return true;
-end
-
-function s2sout.make_connect(host_session, connect_host, connect_port)
- local log = host_session.log or log;
- log("debug", "Beginning new connection attempt to %s ([%s]:%d)", host_session.to_host, connect_host.addr, connect_port);
-
- -- Reset secure flag in case this is another
- -- connection attempt after a failed STARTTLS
- host_session.secure = nil;
- host_session.encrypted = nil;
-
- local conn, handler;
- local proto = connect_host.proto;
- if proto == "IPv4" then
- conn, handler = socket.tcp();
- elseif proto == "IPv6" and socket.tcp6 then
- conn, handler = socket.tcp6();
- else
- handler = "Unsupported protocol: "..tostring(proto);
- end
-
- if not conn then
- log("warn", "Failed to create outgoing connection, system error: %s", handler);
- return false, handler;
- end
-
- conn:settimeout(0);
- local success, err = conn:connect(connect_host.addr, connect_port);
- if not success and err ~= "timeout" then
- log("warn", "s2s connect() to %s (%s:%d) failed: %s", host_session.to_host, connect_host.addr, connect_port, err);
- return false, err;
- end
-
- conn = wrapclient(conn, connect_host.addr, connect_port, s2s_listener, default_mode);
- host_session.conn = conn;
-
- -- Register this outgoing connection so that xmppserver_listener knows about it
- -- otherwise it will assume it is a new incoming connection
- s2s_listener.register_outgoing(conn, host_session);
-
- log("debug", "Connection attempt in progress...");
- return true;
-end
-
-module:hook_global("service-added", function (event)
- if event.name ~= "s2s" then return end
-
- local s2s_sources = portmanager.get_active_services():get("s2s");
- if not s2s_sources then
- module:log("warn", "s2s not listening on any ports, outgoing connections may fail");
- return;
- end
- for source, _ in pairs(s2s_sources) do
- if source == "*" or source == "0.0.0.0" then
- for _, addr in ipairs(local_addresses("ipv4", true)) do
- sources[#sources + 1] = new_ip(addr, "IPv4");
- end
- elseif source == "::" then
- for _, addr in ipairs(local_addresses("ipv6", true)) do
- sources[#sources + 1] = new_ip(addr, "IPv6");
- end
- else
- sources[#sources + 1] = new_ip(source, (source:find(":") and "IPv6") or "IPv4");
- end
- end
- for i = 1,#sources do
- if sources[i].proto == "IPv6" then
- has_ipv6 = true;
- elseif sources[i].proto == "IPv4" then
- has_ipv4 = true;
- end
- end
- if not (has_ipv4 or has_ipv6) then
- module:log("warn", "No local IPv4 or IPv6 addresses detected, outgoing connections may fail");
- end
-end);
-
-return s2sout;