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-rw-r--r--plugins/mod_bosh.lua456
1 files changed, 315 insertions, 141 deletions
diff --git a/plugins/mod_bosh.lua b/plugins/mod_bosh.lua
index 743ebdef..19f191c8 100644
--- a/plugins/mod_bosh.lua
+++ b/plugins/mod_bosh.lua
@@ -1,84 +1,147 @@
-- Prosody IM
--- Copyright (C) 2008-2009 Matthew Wild
--- Copyright (C) 2008-2009 Waqas Hussain
+-- 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.host = "*" -- Global module
+module:set_global(); -- Global module
local hosts = _G.hosts;
-local lxp = require "lxp";
-local init_xmlhandlers = require "core.xmlhandlers"
-local server = require "net.server";
-local httpserver = require "net.httpserver";
+local new_xmpp_stream = require "util.xmppstream".new;
local sm = require "core.sessionmanager";
local sm_destroy_session = sm.destroy_session;
local new_uuid = require "util.uuid".generate;
-local fire_event = require "core.eventmanager".fire_event;
-local core_process_stanza = core_process_stanza;
+local fire_event = prosody.events.fire_event;
+local core_process_stanza = prosody.core_process_stanza;
local st = require "util.stanza";
local logger = require "util.logger";
local log = logger.init("mod_bosh");
-local stream_callbacks = { stream_tag = "http://jabber.org/protocol/httpbind|body" };
-local config = require "core.configmanager";
+local initialize_filters = require "util.filters".initialize;
+local math_min = math.min;
+
+local xmlns_streams = "http://etherx.jabber.org/streams";
+local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
local xmlns_bosh = "http://jabber.org/protocol/httpbind"; -- (hard-coded into a literal in session.send)
-local BOSH_DEFAULT_HOLD = tonumber(config.get("*", "core", "bosh_default_hold")) or 1;
-local BOSH_DEFAULT_INACTIVITY = tonumber(config.get("*", "core", "bosh_max_inactivity")) or 60;
-local BOSH_DEFAULT_POLLING = tonumber(config.get("*", "core", "bosh_max_polling")) or 5;
-local BOSH_DEFAULT_REQUESTS = tonumber(config.get("*", "core", "bosh_max_requests")) or 2;
-local BOSH_DEFAULT_MAXPAUSE = tonumber(config.get("*", "core", "bosh_max_pause")) or 300;
+local stream_callbacks = {
+ stream_ns = xmlns_bosh, stream_tag = "body", default_ns = "jabber:client" };
+
+local BOSH_DEFAULT_HOLD = module:get_option_number("bosh_default_hold", 1);
+local BOSH_DEFAULT_INACTIVITY = module:get_option_number("bosh_max_inactivity", 60);
+local BOSH_DEFAULT_POLLING = module:get_option_number("bosh_max_polling", 5);
+local BOSH_DEFAULT_REQUESTS = module:get_option_number("bosh_max_requests", 2);
+local bosh_max_wait = module:get_option_number("bosh_max_wait", 120);
+
+local consider_bosh_secure = module:get_option_boolean("consider_bosh_secure");
+
+local default_headers = { ["Content-Type"] = "text/xml; charset=utf-8", ["Connection"] = "keep-alive" };
+
+local cross_domain = module:get_option("cross_domain_bosh", false);
+if cross_domain then
+ default_headers["Access-Control-Allow-Methods"] = "GET, POST, OPTIONS";
+ default_headers["Access-Control-Allow-Headers"] = "Content-Type";
+ default_headers["Access-Control-Max-Age"] = "7200";
+
+ if cross_domain == true then
+ default_headers["Access-Control-Allow-Origin"] = "*";
+ elseif type(cross_domain) == "table" then
+ cross_domain = table.concat(cross_domain, ", ");
+ end
+ if type(cross_domain) == "string" then
+ default_headers["Access-Control-Allow-Origin"] = cross_domain;
+ end
+end
+
+local trusted_proxies = module:get_option_set("trusted_proxies", {"127.0.0.1"})._items;
-local default_headers = { ["Content-Type"] = "text/xml; charset=utf-8" };
+local function get_ip_from_request(request)
+ local ip = request.conn:ip();
+ local forwarded_for = request.headers.x_forwarded_for;
+ if forwarded_for then
+ forwarded_for = forwarded_for..", "..ip;
+ for forwarded_ip in forwarded_for:gmatch("[^%s,]+") do
+ if not trusted_proxies[forwarded_ip] then
+ ip = forwarded_ip;
+ end
+ end
+ end
+ return ip;
+end
local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
local os_time = os.time;
-local sessions = {};
-local inactive_sessions = {}; -- Sessions which have no open requests
+-- All sessions, and sessions that have no requests open
+local sessions, inactive_sessions = module:shared("sessions", "inactive_sessions");
-- Used to respond to idle sessions (those with waiting requests)
local waiting_requests = {};
function on_destroy_request(request)
+ log("debug", "Request destroyed: %s", tostring(request));
waiting_requests[request] = nil;
- local session = sessions[request.sid];
+ local session = sessions[request.context.sid];
if session then
local requests = session.requests;
- for i,r in pairs(requests) do
- if r == request then requests[i] = nil; break; end
+ for i, r in ipairs(requests) do
+ if r == request then
+ t_remove(requests, i);
+ break;
+ end
end
-- If this session now has no requests open, mark it as inactive
- if #requests == 0 and session.bosh_max_inactive and not inactive_sessions[session] then
- inactive_sessions[session] = os_time();
- (session.log or log)("debug", "BOSH session marked as inactive at %d", inactive_sessions[session]);
+ local max_inactive = session.bosh_max_inactive;
+ if max_inactive and #requests == 0 then
+ inactive_sessions[session] = os_time() + max_inactive;
+ (session.log or log)("debug", "BOSH session marked as inactive (for %ds)", max_inactive);
end
end
end
-function handle_request(method, body, request)
- if (not body) or request.method ~= "POST" then
- return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
- end
- if not method then
- log("debug", "Request %s suffered error %s", tostring(request.id), body);
- return;
- end
- --log("debug", "Handling new request %s: %s\n----------", request.id, tostring(body));
- request.notopen = true;
- request.log = log;
- local parser = lxp.new(init_xmlhandlers(request, stream_callbacks), "|");
+function handle_OPTIONS(request)
+ local headers = {};
+ for k,v in pairs(default_headers) do headers[k] = v; end
+ headers["Content-Type"] = nil;
+ return { headers = headers, body = "" };
+end
+
+function handle_POST(event)
+ log("debug", "Handling new request %s: %s\n----------", tostring(event.request), tostring(event.request.body));
+
+ local request, response = event.request, event.response;
+ response.on_destroy = on_destroy_request;
+ local body = request.body;
+
+ local context = { request = request, response = response, notopen = true };
+ local stream = new_xmpp_stream(context, stream_callbacks);
+ response.context = context;
- parser:parse(body);
+ -- stream:feed() calls the stream_callbacks, so all stanzas in
+ -- the body are processed in this next line before it returns.
+ -- In particular, the streamopened() stream callback is where
+ -- much of the session logic happens, because it's where we first
+ -- get to see the 'sid' of this request.
+ stream:feed(body);
- local session = sessions[request.sid];
+ -- Stanzas (if any) in the request have now been processed, and
+ -- we take care of the high-level BOSH logic here, including
+ -- giving a response or putting the request "on hold".
+ local session = sessions[context.sid];
if session then
+ -- Session was marked as inactive, since we have
+ -- a request open now, unmark it
+ if inactive_sessions[session] and #session.requests > 0 then
+ inactive_sessions[session] = nil;
+ end
+
local r = session.requests;
- log("debug", "Session %s has %d out of %d requests open", request.sid, #r, session.bosh_hold);
- log("debug", "and there are %d things in the send_buffer", #session.send_buffer);
+ log("debug", "Session %s has %d out of %d requests open", context.sid, #r, session.bosh_hold);
+ log("debug", "and there are %d things in the send_buffer:", #session.send_buffer);
+ for i, thing in ipairs(session.send_buffer) do
+ log("debug", " %s", tostring(thing));
+ end
if #r > session.bosh_hold then
-- We are holding too many requests, send what's in the buffer,
log("debug", "We are holding too many requests, so...");
@@ -98,184 +161,295 @@ function handle_request(method, body, request)
session.send(resp);
end
- if not request.destroyed and session.bosh_wait then
- request.reply_before = os_time() + session.bosh_wait;
- request.on_destroy = on_destroy_request;
- waiting_requests[request] = true;
+ if not response.finished then
+ -- We're keeping this request open, to respond later
+ log("debug", "Have nothing to say, so leaving request unanswered for now");
+ if session.bosh_wait then
+ waiting_requests[response] = os_time() + session.bosh_wait;
+ end
end
- log("debug", "Have nothing to say, so leaving request unanswered for now");
- return true;
+ if session.bosh_terminate then
+ session.log("debug", "Closing session with %d requests open", #session.requests);
+ session:close();
+ return nil;
+ else
+ return true; -- Inform http server we shall reply later
+ end
end
end
local function bosh_reset_stream(session) session.notopen = true; end
-local session_close_reply = { headers = default_headers, body = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate" }), attr = {} };
+local stream_xmlns_attr = { xmlns = "urn:ietf:params:xml:ns:xmpp-streams" };
+
local function bosh_close_stream(session, reason)
(session.log or log)("info", "BOSH client disconnected");
- session_close_reply.attr.condition = reason;
- local session_close_reply = tostring(session_close_reply);
+
+ local close_reply = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate",
+ ["xmlns:stream"] = xmlns_streams });
+
+
+ if reason then
+ close_reply.attr.condition = "remote-stream-error";
+ if type(reason) == "string" then -- assume stream error
+ close_reply:tag("stream:error")
+ :tag(reason, {xmlns = xmlns_xmpp_streams});
+ elseif type(reason) == "table" then
+ if reason.condition then
+ close_reply:tag("stream:error")
+ :tag(reason.condition, stream_xmlns_attr):up();
+ if reason.text then
+ close_reply:tag("text", stream_xmlns_attr):text(reason.text):up();
+ end
+ if reason.extra then
+ close_reply:add_child(reason.extra);
+ end
+ elseif reason.name then -- a stanza
+ close_reply = reason;
+ end
+ end
+ log("info", "Disconnecting client, <stream:error> is: %s", tostring(close_reply));
+ end
+
+ local response_body = tostring(close_reply);
for _, held_request in ipairs(session.requests) do
- held_request:send(session_close_reply);
- held_request:destroy();
+ held_request.headers = default_headers;
+ held_request:send(response_body);
end
sessions[session.sid] = nil;
+ inactive_sessions[session] = nil;
sm_destroy_session(session);
end
-function stream_callbacks.streamopened(request, attr)
- log("debug", "BOSH body open (sid: %s)", attr.sid);
- local sid = attr.sid
+-- Handle the <body> tag in the request payload.
+function stream_callbacks.streamopened(context, attr)
+ local request, response = context.request, context.response;
+ local sid = attr.sid;
+ log("debug", "BOSH body open (sid: %s)", sid or "<none>");
if not sid then
-- New session request
- request.notopen = nil; -- Signals that we accept this opening tag
+ context.notopen = nil; -- Signals that we accept this opening tag
-- TODO: Sanity checks here (rid, to, known host, etc.)
if not hosts[attr.to] then
-- Unknown host
log("debug", "BOSH client tried to connect to unknown host: %s", tostring(attr.to));
- session_close_reply.body.attr.condition = "host-unknown";
- request:send(session_close_reply);
- request.notopen = nil
+ local close_reply = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate",
+ ["xmlns:stream"] = xmlns_streams, condition = "host-unknown" });
+ response:send(tostring(close_reply));
return;
end
-- New session
sid = new_uuid();
- local session = { type = "c2s_unauthed", conn = {}, sid = sid, rid = attr.rid, host = attr.to, bosh_version = attr.ver, bosh_wait = attr.wait, streamid = sid,
- bosh_hold = BOSH_DEFAULT_HOLD, bosh_max_inactive = BOSH_DEFAULT_INACTIVITY,
- requests = { }, send_buffer = {}, reset_stream = bosh_reset_stream, close = bosh_close_stream,
- dispatch_stanza = core_process_stanza, log = logger.init("bosh"..sid), secure = request.secure };
+ local session = {
+ type = "c2s_unauthed", conn = {}, sid = sid, rid = tonumber(attr.rid)-1, host = attr.to,
+ bosh_version = attr.ver, bosh_wait = math_min(attr.wait, bosh_max_wait), streamid = sid,
+ bosh_hold = BOSH_DEFAULT_HOLD, bosh_max_inactive = BOSH_DEFAULT_INACTIVITY,
+ requests = { }, send_buffer = {}, reset_stream = bosh_reset_stream,
+ close = bosh_close_stream, dispatch_stanza = core_process_stanza, notopen = true,
+ log = logger.init("bosh"..sid), secure = consider_bosh_secure or request.secure,
+ ip = get_ip_from_request(request);
+ };
sessions[sid] = session;
+ local filter = initialize_filters(session);
+
+ session.log("debug", "BOSH session created for request from %s", session.ip);
log("info", "New BOSH session, assigned it sid '%s'", sid);
- local r, send_buffer = session.requests, session.send_buffer;
- local response = { headers = default_headers }
+
+ -- Send creation response
+ local creating_session = true;
+
+ local r = session.requests;
function session.send(s)
- log("debug", "Sending BOSH data: %s", tostring(s));
- local oldest_request = r[1];
- while oldest_request and oldest_request.destroyed do
- t_remove(r, 1);
- waiting_requests[oldest_request] = nil;
- oldest_request = r[1];
+ -- We need to ensure that outgoing stanzas have the jabber:client xmlns
+ if s.attr and not s.attr.xmlns then
+ s = st.clone(s);
+ s.attr.xmlns = "jabber:client";
end
- if oldest_request then
- log("debug", "We have an open request, so using that to send with");
- response.body = t_concat{"<body xmlns='http://jabber.org/protocol/httpbind' sid='", sid, "' xmlns:stream = 'http://etherx.jabber.org/streams'>", tostring(s), "</body>" };
- oldest_request:send(response);
- --log("debug", "Sent");
- if oldest_request.stayopen then
- if #r>1 then
- -- Move front request to back
- t_insert(r, oldest_request);
- t_remove(r, 1);
- end
- else
- log("debug", "Destroying the request now...");
- oldest_request:destroy();
- t_remove(r, 1);
+ s = filter("stanzas/out", s);
+ --log("debug", "Sending BOSH data: %s", tostring(s));
+ t_insert(session.send_buffer, tostring(s));
+
+ local oldest_request = r[1];
+ if oldest_request and not session.bosh_processing then
+ log("debug", "We have an open request, so sending on that");
+ oldest_request.headers = default_headers;
+ local body_attr = { xmlns = "http://jabber.org/protocol/httpbind",
+ ["xmlns:stream"] = "http://etherx.jabber.org/streams";
+ type = session.bosh_terminate and "terminate" or nil;
+ sid = sid;
+ };
+ if creating_session then
+ body_attr.inactivity = tostring(BOSH_DEFAULT_INACTIVITY);
+ body_attr.polling = tostring(BOSH_DEFAULT_POLLING);
+ body_attr.requests = tostring(BOSH_DEFAULT_REQUESTS);
+ body_attr.wait = tostring(session.bosh_wait);
+ body_attr.hold = tostring(session.bosh_hold);
+ body_attr.authid = sid;
+ body_attr.secure = "true";
+ body_attr.ver = '1.6'; from = session.host;
+ body_attr["xmlns:xmpp"] = "urn:xmpp:xbosh";
+ body_attr["xmpp:version"] = "1.0";
end
- elseif s ~= "" then
- log("debug", "Saved to send buffer because there are %d open requests", #r);
- -- Hmm, no requests are open :(
- t_insert(session.send_buffer, tostring(s));
- log("debug", "There are now %d things in the send_buffer", #session.send_buffer);
+ oldest_request:send(st.stanza("body", body_attr):top_tag()..t_concat(session.send_buffer).."</body>");
+ session.send_buffer = {};
end
+ return true;
end
-
- -- Send creation response
-
- local features = st.stanza("stream:features");
- fire_event("stream-features", session, features);
- --xmpp:version='1.0' xmlns:xmpp='urn:xmpp:xbosh'
- local response = st.stanza("body", { xmlns = xmlns_bosh,
- inactivity = tostring(BOSH_DEFAULT_INACTIVITY), polling = tostring(BOSH_DEFAULT_POLLING), requests = tostring(BOSH_DEFAULT_REQUESTS), hold = tostring(session.bosh_hold), maxpause = "120",
- sid = sid, authid = sid, ver = '1.6', from = session.host, secure = 'true', ["xmpp:version"] = "1.0",
- ["xmlns:xmpp"] = "urn:xmpp:xbosh", ["xmlns:stream"] = "http://etherx.jabber.org/streams" }):add_child(features);
- request:send{ headers = default_headers, body = tostring(response) };
-
request.sid = sid;
- return;
end
local session = sessions[sid];
if not session then
-- Unknown sid
log("info", "Client tried to use sid '%s' which we don't know about", sid);
- request:send{ headers = default_headers, body = tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })) };
- request.notopen = nil;
+ response.headers = default_headers;
+ response:send(tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })));
+ context.notopen = nil;
return;
end
- if attr.type == "terminate" then
- -- Client wants to end this session
- session:close();
- request.notopen = nil;
- return;
+ if session.rid then
+ local rid = tonumber(attr.rid);
+ local diff = rid - session.rid;
+ if diff > 1 then
+ session.log("warn", "rid too large (means a request was lost). Last rid: %d New rid: %s", session.rid, attr.rid);
+ elseif diff <= 0 then
+ -- Repeated, ignore
+ session.log("debug", "rid repeated (on request %s), ignoring: %s (diff %d)", request.id, session.rid, diff);
+ context.notopen = nil;
+ context.ignore = true;
+ context.sid = sid;
+ t_insert(session.requests, response);
+ return;
+ end
+ session.rid = rid;
end
- -- If session was inactive, make sure it is now marked as not
- if #session.requests == 0 then
- (session.log or log)("debug", "BOSH client now active again at %d", os_time());
- inactive_sessions[session] = nil;
+ if attr.type == "terminate" then
+ -- Client wants to end this session, which we'll do
+ -- after processing any stanzas in this request
+ session.bosh_terminate = true;
end
-
+
+ context.notopen = nil; -- Signals that we accept this opening tag
+ t_insert(session.requests, response);
+ context.sid = sid;
+ session.bosh_processing = true; -- Used to suppress replies until processing of this request is done
+
if session.notopen then
local features = st.stanza("stream:features");
+ hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
fire_event("stream-features", session, features);
- session.send(features);
+ table.insert(session.send_buffer, tostring(features));
session.notopen = nil;
end
-
- request.notopen = nil; -- Signals that we accept this opening tag
- t_insert(session.requests, request);
- request.sid = sid;
end
-function stream_callbacks.handlestanza(request, stanza)
+function stream_callbacks.handlestanza(context, stanza)
+ if context.ignore then return; end
log("debug", "BOSH stanza received: %s\n", stanza:top_tag());
- local session = sessions[request.sid];
+ local session = sessions[context.sid];
if session then
if stanza.attr.xmlns == xmlns_bosh then
- stanza.attr.xmlns = "jabber:client";
+ stanza.attr.xmlns = nil;
end
+ stanza = session.filter("stanzas/in", stanza);
core_process_stanza(session, stanza);
end
end
+function stream_callbacks.streamclosed(request)
+ local session = sessions[request.sid];
+ if session then
+ session.bosh_processing = false;
+ if #session.send_buffer > 0 then
+ session.send("");
+ end
+ end
+end
+
+function stream_callbacks.error(context, error)
+ log("debug", "Error parsing BOSH request payload; %s", error);
+ if not context.sid then
+ local response = context.response;
+ response.headers = default_headers;
+ response.status_code = 400;
+ response:send();
+ return;
+ end
+
+ local session = sessions[context.sid];
+ if error == "stream-error" then -- Remote stream error, we close normally
+ session:close();
+ else
+ session:close({ condition = "bad-format", text = "Error processing stream" });
+ end
+end
+
+local dead_sessions = {};
function on_timer()
-- log("debug", "Checking for requests soon to timeout...");
-- Identify requests timing out within the next few seconds
local now = os_time() + 3;
- for request in pairs(waiting_requests) do
- if request.reply_before <= now then
- log("debug", "%s was soon to timeout, sending empty response", request.id);
+ for request, reply_before in pairs(waiting_requests) do
+ if reply_before <= now then
+ log("debug", "%s was soon to timeout (at %d, now %d), sending empty response", tostring(request), reply_before, now);
-- Send empty response to let the
-- client know we're still here
if request.conn then
- sessions[request.sid].send("");
+ sessions[request.context.sid].send("");
end
end
end
now = now - 3;
- for session, inactive_since in pairs(inactive_sessions) do
- if session.bosh_max_inactive then
- if now - inactive_since > session.bosh_max_inactive then
- (session.log or log)("debug", "BOSH client inactive too long, destroying session at %d", now);
- sessions[session.sid] = nil;
- inactive_sessions[session] = nil;
- sm_destroy_session(session, "BOSH client silent for over "..session.bosh_max_inactive.." seconds");
- end
- else
+ local n_dead_sessions = 0;
+ for session, close_after in pairs(inactive_sessions) do
+ if close_after < now then
+ (session.log or log)("debug", "BOSH client inactive too long, destroying session at %d", now);
+ sessions[session.sid] = nil;
inactive_sessions[session] = nil;
+ n_dead_sessions = n_dead_sessions + 1;
+ dead_sessions[n_dead_sessions] = session;
end
end
+
+ for i=1,n_dead_sessions do
+ local session = dead_sessions[i];
+ dead_sessions[i] = nil;
+ sm_destroy_session(session, "BOSH client silent for over "..session.bosh_max_inactive.." seconds");
+ end
+ return 1;
end
+module:add_timer(1, on_timer);
-local ports = config.get(module.host, "core", "bosh_ports") or { 5280 };
-httpserver.new_from_config(ports, "http-bind", handle_request);
-server.addtimer(on_timer);
+local GET_response = {
+ headers = {
+ content_type = "text/html";
+ };
+ body = [[<html><body>
+ <p>It works! Now point your BOSH client to this URL to connect to Prosody.</p>
+ <p>For more information see <a href="http://prosody.im/doc/setting_up_bosh">Prosody: Setting up BOSH</a>.</p>
+ </body></html>]];
+};
+
+function module.add_host(module)
+ module:depends("http");
+ module:provides("http", {
+ default_path = "/http-bind";
+ route = {
+ ["GET"] = GET_response;
+ ["GET /"] = GET_response;
+ ["OPTIONS"] = handle_OPTIONS;
+ ["OPTIONS /"] = handle_OPTIONS;
+ ["POST"] = handle_POST;
+ ["POST /"] = handle_POST;
+ };
+ });
+end
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