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-rw-r--r--core/s2smanager.lua165
1 files changed, 119 insertions, 46 deletions
diff --git a/core/s2smanager.lua b/core/s2smanager.lua
index 0c29da14..fd9a72d0 100644
--- a/core/s2smanager.lua
+++ b/core/s2smanager.lua
@@ -16,20 +16,19 @@ local socket = require "socket";
local format = string.format;
local t_insert, t_sort = table.insert, table.sort;
local get_traceback = debug.traceback;
-local tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber,
- setmetatable
- = tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber,
- setmetatable;
+local tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber, setmetatable
+ = tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber, setmetatable;
local idna_to_ascii = require "util.encodings".idna.to_ascii;
local connlisteners_get = require "net.connlisteners".get;
+local initialize_filters = require "util.filters".initialize;
local wrapclient = require "net.server".wrapclient;
local modulemanager = require "core.modulemanager";
local st = require "stanza";
local stanza = st.stanza;
local nameprep = require "util.encodings".stringprep.nameprep;
-local fire_event = require "core.eventmanager".fire_event;
+local fire_event = prosody.events.fire_event;
local uuid_gen = require "util.uuid".generate;
local logger_init = require "util.logger".init;
@@ -41,11 +40,14 @@ local sha256_hash = require "util.hashes".sha256;
local adns, dns = require "net.adns", require "net.dns";
local config = require "core.configmanager";
local connect_timeout = config.get("*", "core", "s2s_timeout") or 60;
-local dns_timeout = config.get("*", "core", "dns_timeout") or 60;
+local dns_timeout = config.get("*", "core", "dns_timeout") or 15;
local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3;
+dns.settimeout(dns_timeout);
+
+local prosody = _G.prosody;
incoming_s2s = {};
-_G.prosody.incoming_s2s = incoming_s2s;
+prosody.incoming_s2s = incoming_s2s;
local incoming_s2s = incoming_s2s;
module "s2smanager"
@@ -54,6 +56,7 @@ function compare_srv_priorities(a,b)
return a.priority < b.priority or (a.priority == b.priority and a.weight > b.weight);
end
+local bouncy_stanzas = { message = true, presence = true, iq = true };
local function bounce_sendq(session, reason)
local sendq = session.sendq;
if sendq then
@@ -67,13 +70,13 @@ local function bounce_sendq(session, reason)
};
for i, data in ipairs(sendq) do
local reply = data[2];
- local xmlns = reply.attr.xmlns;
- if not xmlns then
+ if reply and not(reply.attr.xmlns) and bouncy_stanzas[reply.name] then
reply.attr.type = "error";
reply:tag("error", {type = "cancel"})
: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("Connection failed: "..reason):up();
+ 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
@@ -95,13 +98,14 @@ function send_to_host(from_host, to_host, data)
(host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host);
-- Queue stanza until we are able to send it
- if host.sendq then t_insert(host.sendq, {tostring(data), st.reply(data)});
- else host.sendq = { {tostring(data), st.reply(data)} }; end
+ if host.sendq then t_insert(host.sendq, {tostring(data), data.attr.type ~= "error" and data.attr.type ~= "result" and st.reply(data)});
+ else host.sendq = { {tostring(data), data.attr.type ~= "error" and data.attr.type ~= "result" and st.reply(data)} }; end
host.log("debug", "stanza [%s] queued ", data.name);
elseif host.type == "local" or host.type == "component" then
log("error", "Trying to send a stanza to ourselves??")
log("error", "Traceback: %s", get_traceback());
log("error", "Stanza: %s", tostring(data));
+ return false;
else
(host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host);
-- FIXME
@@ -117,13 +121,18 @@ function send_to_host(from_host, to_host, data)
local host_session = new_outgoing(from_host, to_host);
-- Store in buffer
- host_session.sendq = { {tostring(data), st.reply(data)} };
+ host_session.sendq = { {tostring(data), data.attr.type ~= "error" and data.attr.type ~= "result" and st.reply(data)} };
log("debug", "stanza [%s] queued until connection complete", tostring(data.name));
if (not host_session.connecting) and (not host_session.conn) then
log("warn", "Connection to %s failed already, destroying session...", to_host);
- destroy_session(host_session);
+ if not destroy_session(host_session, "Connection failed") then
+ -- Already destroyed, we need to bounce our stanza
+ bounce_sendq(host_session, host_session.destruction_reason);
+ end
+ return false;
end
end
+ return true;
end
local open_sessions = 0;
@@ -137,7 +146,19 @@ function new_incoming(conn)
open_sessions = open_sessions + 1;
local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$"));
session.log = log;
- session.sends2s = function (t) log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^([^>]*>?)")); w(conn, tostring(t)); end
+ local filter = initialize_filters(session);
+ session.sends2s = function (t)
+ log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^([^>]*>?)"));
+ if t.name then
+ t = filter("stanzas/out", t);
+ end
+ if t then
+ t = filter("bytes/out", tostring(t));
+ if t then
+ return w(conn, t);
+ end
+ end
+ end
incoming_s2s[session] = true;
add_task(connect_timeout, function ()
if session.conn ~= conn or
@@ -145,7 +166,7 @@ function new_incoming(conn)
return; -- Ok, we're connect[ed|ing]
end
-- Not connected, need to close session and clean up
- (session.log or log)("warn", "Destroying incomplete session %s->%s due to inactivity",
+ (session.log or log)("debug", "Destroying incomplete session %s->%s due to inactivity",
session.from_host or "(unknown)", session.to_host or "(unknown)");
session:close("connection-timeout");
end);
@@ -159,6 +180,8 @@ function new_outgoing(from_host, to_host, connect)
hosts[from_host].s2sout[to_host] = host_session;
+ host_session.close = destroy_session; -- This gets replaced by xmppserver_listener later
+
local log;
do
local conn_name = "s2sout"..tostring(host_session):match("[a-f0-9]*$");
@@ -166,9 +189,15 @@ function new_outgoing(from_host, to_host, connect)
host_session.log = log;
end
+ initialize_filters(host_session);
+
if connect ~= false then
-- Kick the connection attempting machine into life
- attempt_connection(host_session);
+ if not attempt_connection(host_session) then
+ -- Intentionally not returning here, the
+ -- session is needed, connected or not
+ destroy_session(host_session);
+ end
end
if not host_session.sends2s then
@@ -234,13 +263,6 @@ function attempt_connection(host_session, err)
end
end, "_xmpp-server._tcp."..connect_host..".", "SRV");
- -- Set handler for DNS timeout
- add_task(dns_timeout, function ()
- if handle then
- adns.cancel(handle, true);
- end
- end);
-
return true; -- Attempt in progress
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;
@@ -265,7 +287,7 @@ end
function try_connect(host_session, connect_host, connect_port)
host_session.connecting = true;
local handle;
- handle = adns.lookup(function (reply)
+ handle = adns.lookup(function (reply, err)
handle = nil;
host_session.connecting = nil;
@@ -283,23 +305,23 @@ function try_connect(host_session, connect_host, connect_port)
if reply and reply[#reply] and reply[#reply].a then
log("debug", "DNS reply for %s gives us %s", connect_host, reply[#reply].a);
- return make_connect(host_session, reply[#reply].a, connect_port);
+ local ok, err = make_connect(host_session, reply[#reply].a, connect_port);
+ if not ok then
+ if not attempt_connection(host_session, err or "closed") then
+ err = err and (": "..err) or "";
+ destroy_session(host_session, "Connection failed"..err);
+ end
+ end
else
log("debug", "DNS lookup failed to get a response for %s", connect_host);
if not 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);
- destroy_session(host_session, "DNS resolution failed"); -- End of the line, we can't
+ err = err and (": "..err) or "";
+ destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't
end
end
end, connect_host, "A", "IN");
- -- Set handler for DNS timeout
- add_task(dns_timeout, function ()
- if handle then
- adns.cancel(handle, true);
- end
- end);
-
return true;
end
@@ -309,7 +331,7 @@ function make_connect(host_session, connect_host, connect_port)
local from_host, to_host = host_session.from_host, host_session.to_host;
- local conn, handler = socket.tcp()
+ local conn, handler = socket.tcp();
if not conn then
log("warn", "Failed to create outgoing connection, system error: %s", handler);
@@ -327,13 +349,25 @@ function make_connect(host_session, connect_host, connect_port)
conn = wrapclient(conn, connect_host, connect_port, cl, cl.default_mode or 1 );
host_session.conn = conn;
+ local filter = initialize_filters(host_session);
+ local w, log = conn.write, host_session.log;
+ host_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, tostring(t));
+ end
+ end
+ end
+
-- Register this outgoing connection so that xmppserver_listener knows about it
-- otherwise it will assume it is a new incoming connection
cl.register_outgoing(conn, host_session);
- local w, log = conn.write, host_session.log;
- host_session.sends2s = function (t) log("debug", "sending: %s", (t.top_tag and t:top_tag()) or t:match("^[^>]*>?")); w(conn, tostring(t)); end
-
host_session:open_stream(from_host, to_host);
log("debug", "Connection attempt in progress...");
@@ -375,10 +409,22 @@ function streamopened(session, attr)
session.streamid = uuid_gen();
(session.log or log)("debug", "incoming s2s received <stream:stream>");
- if session.to_host and not hosts[session.to_host] then
- -- Attempting to connect to a host we don't serve
- session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host });
- return;
+ if session.to_host then
+ if not hosts[session.to_host] then
+ -- Attempting to connect to a host we don't serve
+ session:close({
+ condition = "host-unknown";
+ text = "This host does not serve "..session.to_host
+ });
+ return;
+ elseif hosts[session.to_host].disallow_s2s then
+ -- Attempting to connect to a host that disallows s2s
+ session:close({
+ condition = "policy-violation";
+ text = "Server-to-server communication is not allowed to this host";
+ });
+ return;
+ end
end
send("<?xml version='1.0'?>");
send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback',
@@ -463,9 +509,11 @@ function make_authenticated(session, host)
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;
@@ -486,8 +534,16 @@ function mark_connected(session)
session.log("info", session.direction.." s2s connection "..from.."->"..to.." complete");
local send_to_host = send_to_host;
- function session.send(data) send_to_host(to, from, data); end
+ function session.send(data) return send_to_host(to, from, data); end
+ local event_data = { session = session };
+ if session.type == "s2sout" then
+ prosody.events.fire_event("s2sout-established", event_data);
+ hosts[session.from_host].events.fire_event("s2sout-established", event_data);
+ else
+ prosody.events.fire_event("s2sin-established", event_data);
+ hosts[session.to_host].events.fire_event("s2sin-established", event_data);
+ end
if session.direction == "outgoing" then
if sendq then
@@ -512,9 +568,10 @@ local resting_session = { -- Resting, not dead
close = function (session)
session.log("debug", "Attempt to close already-closed session");
end;
+ filter = function (type, data) return data; end;
}; resting_session.__index = resting_session;
-function retire_session(session)
+function retire_session(session, reason)
local log = session.log or log;
for k in pairs(session) do
if k ~= "trace" and k ~= "log" and k ~= "id" then
@@ -522,6 +579,8 @@ function retire_session(session)
end
end
+ session.destruction_reason = reason;
+
function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
return setmetatable(session, resting_session);
@@ -529,7 +588,7 @@ end
function destroy_session(session, reason)
if session.destroyed then return; end
- (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host));
+ (session.log or log)("debug", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host));
if session.direction == "outgoing" then
hosts[session.from_host].s2sout[session.to_host] = nil;
@@ -538,7 +597,21 @@ function destroy_session(session, reason)
incoming_s2s[session] = nil;
end
- retire_session(session); -- Clean session until it is GC'd
+ local event_data = { session = session, reason = reason };
+ if session.type == "s2sout" then
+ prosody.events.fire_event("s2sout-destroyed", event_data);
+ if hosts[session.from_host] then
+ hosts[session.from_host].events.fire_event("s2sout-destroyed", event_data);
+ end
+ elseif session.type == "s2sin" then
+ prosody.events.fire_event("s2sin-destroyed", event_data);
+ if hosts[session.to_host] then
+ hosts[session.to_host].events.fire_event("s2sin-destroyed", event_data);
+ end
+ end
+
+ retire_session(session, reason); -- Clean session until it is GC'd
+ return true;
end
return _M;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 21:38:56 +0000