X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=core%2Fs2smanager.lua;h=b14f0e96c29824d7165061dec47ac3e6fb114ca3;hb=34215744d79b2fcf146b69a59007d104085dff4a;hp=7827381d4b1eee375a674448fc7e760f2048bf82;hpb=cad5dde6b7b2925ba5a1cbc5dc163bea21dc0b25;p=prosody.git diff --git a/core/s2smanager.lua b/core/s2smanager.lua index 7827381d..b14f0e96 100644 --- a/core/s2smanager.lua +++ b/core/s2smanager.lua @@ -1,39 +1,30 @@ --- Prosody IM v0.1 --- Copyright (C) 2008 Matthew Wild --- Copyright (C) 2008 Waqas Hussain +-- Prosody IM v0.4 +-- Copyright (C) 2008-2009 Matthew Wild +-- Copyright (C) 2008-2009 Waqas Hussain -- --- This program is free software; you can redistribute it and/or --- modify it under the terms of the GNU General Public License --- as published by the Free Software Foundation; either version 2 --- of the License, or (at your option) any later version. --- --- This program is distributed in the hope that it will be useful, --- but WITHOUT ANY WARRANTY; without even the implied warranty of --- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --- GNU General Public License for more details. --- --- You should have received a copy of the GNU General Public License --- along with this program; if not, write to the Free Software --- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +-- This project is MIT/X11 licensed. Please see the +-- COPYING file in the source package for more information. -- local hosts = hosts; local sessions = sessions; +local core_process_stanza = function(a, b) core_process_stanza(a, b); end 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, print, newproxy, error, tonumber - = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; +local tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber + = tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber; local idna_to_ascii = require "util.encodings".idna.to_ascii; local connlisteners_get = require "net.connlisteners".get; -local wraptlsclient = require "net.server".wraptlsclient; +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 uuid_gen = require "util.uuid".generate; @@ -45,26 +36,55 @@ local sha256_hash = require "util.hashes".sha256; local dialback_secret = sha256_hash(tostring{} .. math.random() .. socket.gettime(), true); -local dns = require "net.dns"; +local adns = require "net.adns"; + +incoming_s2s = {}; +local incoming_s2s = incoming_s2s; module "s2smanager" local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end +local function bounce_sendq(session) + local sendq = session.sendq; + if sendq then + session.log("info", "sending error replies for "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host)); + local dummy = { + type = "s2sin"; + send = function(s) + (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", get_traceback()); + end; + dummy = true; + }; + for i, data in ipairs(sendq) do + local reply = data[2]; + local xmlns = reply.attr.xmlns; + if not xmlns or xmlns == "jabber:client" or xmlns == "jabber:server" then + reply.attr.type = "error"; + reply:tag("error", {type = "cancel"}) + :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); + core_process_stanza(dummy, reply); + end + sendq[i] = nil; + end + session.sendq = nil; + end +end + function send_to_host(from_host, to_host, data) 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 data.name ~= "db:verify" and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host); - if not host.notopen and not host.dialback_key then + if not host.notopen and not host.dialback_key and host.sends2s then host.log("debug", "dialback had not been initiated"); initiate_dialback(host); end -- Queue stanza until we are able to send it - if host.sendq then t_insert(host.sendq, tostring(data)); - else host.sendq = { tostring(data) }; end + if host.sendq then t_insert(host.sendq, {tostring(data), st.reply(data)}); + else host.sendq = { {tostring(data), 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??") @@ -84,14 +104,19 @@ function send_to_host(from_host, to_host, data) log("debug", "opening a new outgoing connection for this stanza"); local host_session = new_outgoing(from_host, to_host); -- Store in buffer - host_session.sendq = { tostring(data) }; + host_session.sendq = { {tostring(data), 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); + end end end local open_sessions = 0; function new_incoming(conn) - local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; + local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming", hosts = {} }; if true then session.trace = newproxy(true); getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end; @@ -99,6 +124,7 @@ function new_incoming(conn) open_sessions = open_sessions + 1; local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end + incoming_s2s[session] = true; return session; end @@ -115,55 +141,97 @@ function new_outgoing(from_host, to_host) attempt_connection(host_session); + 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", to_host); + buffer[#buffer+1] = data; + log("debug", "Buffered item %d: %s", #buffer, tostring(data)); + end + + end + return host_session; end function attempt_connection(host_session, err) local from_host, to_host = host_session.from_host, host_session.to_host; - local conn, handler = socket.tcp() - local connect_host, connect_port = idna_to_ascii(to_host), 5269; if not err then -- This is our first attempt - local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV"); - - if answer then - log("debug", to_host.." has SRV records, handling..."); - local srv_hosts = {}; - host_session.srv_hosts = srv_hosts; - for _, record in ipairs(answer) do - t_insert(srv_hosts, record.srv); - 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); + log("debug", "First attempt to connect to %s, starting with SRV lookup...", to_host); + host_session.connecting = true; + local answer = + adns.lookup(function (answer) + host_session.connecting = nil; + if answer then + log("debug", to_host.." has SRV records, handling..."); + local srv_hosts = {}; + host_session.srv_hosts = srv_hosts; + for _, record in ipairs(answer) do + t_insert(srv_hosts, record.srv); + 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", to_host.." has no SRV records, falling back to A"); end - end + -- Try with SRV, or just the plain hostname if no SRV + return try_connect(host_session, connect_host, connect_port); + end, "_xmpp-server._tcp."..connect_host..".", "SRV"); + log("debug", "DNS lookup for %s sent, waiting for response before we can connect", to_host); + 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; 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("debug", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); + host_session.log("info", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); else - host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); + host_session.log("info", "Out of connection options, can't connect to %s", tostring(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 :(", tostring(connect_host), tostring(connect_port), tostring(to_host)); + return false; + end + + return try_connect(host_session, connect_host, connect_port); +end + +function try_connect(host_session, connect_host, connect_port) + host_session.log("info", "Beginning new connection attempt to %s (%s:%d)", host_session.to_host, connect_host, connect_port); -- Ok, we're going to try to connect + + local from_host, to_host = host_session.from_host, host_session.to_host; + + local conn, handler = socket.tcp() + conn:settimeout(0); local success, err = conn:connect(connect_host, connect_port); if not success and err ~= "timeout" then log("warn", "s2s connect() failed: %s", err); + return false; end local cl = connlisteners_get("xmppserver"); - conn = wraptlsclient(cl, conn, connect_host, connect_port, 0, cl.default_mode or 1, hosts[from_host].ssl_ctx ); + conn = wrapclient(conn, connect_host, connect_port, cl, cl.default_mode or 1, hosts[from_host].ssl_ctx, false ); host_session.conn = conn; -- Register this outgoing connection so that xmppserver_listener knows about it @@ -174,6 +242,7 @@ function attempt_connection(host_session, err) host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end conn.write(format([[]], from_host, to_host)); + log("debug", "Connection attempt in progress..."); return true; end @@ -184,22 +253,19 @@ function streamopened(session, attr) session.version = 0; --tonumber(attr.version) or 0; if session.version >= 1.0 and not (attr.to and attr.from) then - --print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); end if session.direction == "incoming" then -- Send a reply stream header - - --for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end - - session.to_host = attr.to; - session.from_host = attr.from; + session.to_host = attr.to and nameprep(attr.to); + session.from_host = attr.from and nameprep(attr.from); session.streamid = uuid_gen(); (session.log or log)("debug", "incoming s2s received "); send(""); - send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag()); + send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', + ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag()); 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 }); @@ -214,6 +280,20 @@ function streamopened(session, attr) if not attr.id then error("stream response did not give us a streamid!!!"); end session.streamid = attr.id; + -- 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 not session.dialback_verifying then initiate_dialback(session); else @@ -224,6 +304,12 @@ function streamopened(session, attr) session.notopen = nil; end +function streamclosed(session) + (session.log or log)("debug", ""); + session.sends2s(""); + session.notopen = true; +end + function initiate_dialback(session) -- generate dialback key session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); @@ -239,15 +325,20 @@ function verify_dialback(id, to, from, key) return key == generate_dialback(id, to, from); end -function make_authenticated(session) +function make_authenticated(session, host) if session.type == "s2sout_unauthed" then session.type = "s2sout"; elseif session.type == "s2sin_unauthed" then session.type = "s2sin"; + if host then + session.hosts[host].authed = true; + end + elseif session.type == "s2sin" and host then + session.hosts[host].authed = true; else return false; end - session.log("info", "connection is now authenticated"); + session.log("debug", "connection %s->%s is now authenticated", session.from_host or "(unknown)", session.to_host or "(unknown)"); mark_connected(session); @@ -259,7 +350,7 @@ function mark_connected(session) local from, to = session.from_host, session.to_host; - session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); + 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 @@ -269,7 +360,7 @@ function mark_connected(session) if sendq then session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); for i, data in ipairs(sendq) do - send(data); + send(data[1]); sendq[i] = nil; end session.sendq = nil; @@ -280,10 +371,11 @@ end function destroy_session(session) (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); - -- FIXME: Flush sendq here/report errors to originators - if session.direction == "outgoing" then hosts[session.from_host].s2sout[session.to_host] = nil; + bounce_sendq(session); + elseif session.direction == "incoming" then + incoming_s2s[session] = nil; end for k in pairs(session) do