author | Matthew Wild <mwild1@gmail.com> |
Sat, 13 Dec 2008 17:43:52 +0000 | |
changeset 621 | cd2cab5400fc |
parent 615 | 4ae3e81513f3 |
child 631 | 6957fe7b0313 |
permissions | -rw-r--r-- |
615 | 1 |
-- Prosody IM v0.2 |
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-- Copyright (C) 2008 Matthew Wild |
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-- Copyright (C) 2008 Waqas Hussain |
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-- |
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-- This program is free software; you can redistribute it and/or |
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-- modify it under the terms of the GNU General Public License |
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-- as published by the Free Software Foundation; either version 2 |
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-- of the License, or (at your option) any later version. |
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-- |
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-- This program is distributed in the hope that it will be useful, |
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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-- GNU General Public License for more details. |
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-- |
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-- You should have received a copy of the GNU General Public License |
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-- along with this program; if not, write to the Free Software |
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-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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-- |
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148 | 21 |
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22 |
local hosts = hosts; |
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23 |
local sessions = sessions; |
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24 |
local socket = require "socket"; |
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25 |
local format = string.format; |
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337 | 26 |
local t_insert, t_sort = table.insert, table.sort; |
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local get_traceback = debug.traceback; |
148 | 28 |
local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
29 |
= tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; |
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30 |
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local idna_to_ascii = require "util.encodings".idna.to_ascii; |
148 | 32 |
local connlisteners_get = require "net.connlisteners".get; |
33 |
local wraptlsclient = require "net.server".wraptlsclient; |
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34 |
local modulemanager = require "core.modulemanager"; |
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local st = require "stanza"; |
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local stanza = st.stanza; |
148 | 37 |
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38 |
local uuid_gen = require "util.uuid".generate; |
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39 |
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40 |
local logger_init = require "util.logger".init; |
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local log = logger_init("s2smanager"); |
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Switched from md5 to sha256 for dialback key generation
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local sha256_hash = require "util.hashes".sha256; |
148 | 45 |
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local dialback_secret = sha256_hash(tostring{} .. math.random() .. socket.gettime(), true); |
148 | 47 |
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337 | 48 |
local dns = require "net.dns"; |
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incoming_s2s = {}; |
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local incoming_s2s = incoming_s2s; |
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148 | 53 |
module "s2smanager" |
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337 | 55 |
local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end |
56 |
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148 | 57 |
function send_to_host(from_host, to_host, data) |
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local host = hosts[from_host].s2sout[to_host]; |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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if host then |
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-- We have a connection to this host already |
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Remove an incorrect line which I didn't add, and fix the proper way. Corrects the sending of stanzas over unauthed s2sout's. Also fixes mod_dialback to send stanzas and not strings.
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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 |
558
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Fix for s2s with jabberd2 (we weren't routing db:verify's over s2sout_unauthed)
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(host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host); |
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if not host.notopen and not host.dialback_key then |
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host.log("debug", "dialback had not been initiated"); |
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initiate_dialback(host); |
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66 |
end |
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67 |
|
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68 |
-- Queue stanza until we are able to send it |
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fa4a51fe6442
Remove an incorrect line which I didn't add, and fix the proper way. Corrects the sending of stanzas over unauthed s2sout's. Also fixes mod_dialback to send stanzas and not strings.
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69 |
if host.sendq then t_insert(host.sendq, tostring(data)); |
fa4a51fe6442
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else host.sendq = { tostring(data) }; end |
fa4a51fe6442
Remove an incorrect line which I didn't add, and fix the proper way. Corrects the sending of stanzas over unauthed s2sout's. Also fixes mod_dialback to send stanzas and not strings.
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host.log("debug", "stanza [%s] queued ", data.name); |
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elseif host.type == "local" or host.type == "component" then |
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log("error", "Trying to send a stanza to ourselves??") |
256 | 74 |
log("error", "Traceback: %s", get_traceback()); |
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Yep, s2s definitely works now. This is just a small fix for logging...
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log("error", "Stanza: %s", tostring(data)); |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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else |
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(host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
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Just committing this warning, because I want to know if the problem really affects us
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78 |
-- FIXME |
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if host.from_host ~= from_host then |
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log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
331 | 81 |
log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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end |
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host.sends2s(data); |
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host.log("debug", "stanza sent over "..host.type); |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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end |
148 | 86 |
else |
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log("debug", "opening a new outgoing connection for this stanza"); |
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local host_session = new_outgoing(from_host, to_host); |
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-- Store in buffer |
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559
fa4a51fe6442
Remove an incorrect line which I didn't add, and fix the proper way. Corrects the sending of stanzas over unauthed s2sout's. Also fixes mod_dialback to send stanzas and not strings.
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host_session.sendq = { tostring(data) }; |
148 | 91 |
end |
92 |
end |
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local open_sessions = 0; |
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function new_incoming(conn) |
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local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming", hosts = {} }; |
148 | 98 |
if true then |
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session.trace = newproxy(true); |
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Remove print()s from sessionmanager and s2smanager
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getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end; |
148 | 101 |
end |
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open_sessions = open_sessions + 1; |
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343 | 103 |
local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); |
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session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end |
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incoming_s2s[session] = true; |
148 | 106 |
return session; |
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end |
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function new_outgoing(from_host, to_host) |
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local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; |
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hosts[from_host].s2sout[to_host] = host_session; |
148 | 112 |
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local log; |
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do |
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Fix logger ids for c2s and s2sout
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local conn_name = "s2sout"..tostring(host_session):match("[a-f0-9]*$"); |
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log = logger_init(conn_name); |
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host_session.log = log; |
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118 |
end |
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attempt_connection(host_session); |
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return host_session; |
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end |
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Remove an old FIXME comment
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function attempt_connection(host_session, err) |
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127 |
local from_host, to_host = host_session.from_host, host_session.to_host; |
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local conn, handler = socket.tcp() |
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|
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local connect_host, connect_port = idna_to_ascii(to_host), 5269; |
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|
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if not err then -- This is our first attempt |
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local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV"); |
337 | 134 |
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if answer then |
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136 |
log("debug", to_host.." has SRV records, handling..."); |
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local srv_hosts = {}; |
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host_session.srv_hosts = srv_hosts; |
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for _, record in ipairs(answer) do |
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t_insert(srv_hosts, record.srv); |
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end |
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t_sort(srv_hosts, compare_srv_priorities); |
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local srv_choice = srv_hosts[1]; |
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host_session.srv_choice = 1; |
337 | 146 |
if srv_choice then |
147 |
connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
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log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); |
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end |
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150 |
end |
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elseif host_session.srv_hosts and #host_session.srv_hosts > host_session.srv_choice then -- Not our first attempt, and we also have SRV |
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152 |
host_session.srv_choice = host_session.srv_choice + 1; |
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153 |
local srv_choice = host_session.srv_hosts[host_session.srv_choice]; |
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154 |
connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
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Log reason for connection failure
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|
155 |
host_session.log("debug", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); |
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156 |
else |
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157 |
host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); |
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158 |
-- We're out of options |
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159 |
return false; |
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160 |
end |
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161 |
|
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162 |
-- Ok, we're going to try to connect |
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163 |
conn:settimeout(0); |
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164 |
local success, err = conn:connect(connect_host, connect_port); |
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165 |
if not success and err ~= "timeout" then |
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166 |
log("warn", "s2s connect() failed: %s", err); |
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167 |
end |
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168 |
|
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169 |
local cl = connlisteners_get("xmppserver"); |
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170 |
conn = wraptlsclient(cl, conn, connect_host, connect_port, 0, cl.default_mode or 1, hosts[from_host].ssl_ctx ); |
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171 |
host_session.conn = conn; |
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172 |
|
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173 |
-- Register this outgoing connection so that xmppserver_listener knows about it |
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174 |
-- otherwise it will assume it is a new incoming connection |
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175 |
cl.register_outgoing(conn, host_session); |
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176 |
|
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177 |
local w = conn.write; |
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178 |
host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end |
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179 |
|
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180 |
conn.write(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host)); |
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181 |
return true; |
148 | 182 |
end |
183 |
||
184 |
function streamopened(session, attr) |
|
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|
185 |
local send = session.sends2s; |
148 | 186 |
|
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|
187 |
-- TODO: #29: SASL/TLS on s2s streams |
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|
188 |
session.version = 0; --tonumber(attr.version) or 0; |
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189 |
|
148 | 190 |
if session.version >= 1.0 and not (attr.to and attr.from) then |
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|
191 |
--print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); |
148 | 192 |
log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); |
193 |
end |
|
194 |
||
195 |
if session.direction == "incoming" then |
|
196 |
-- Send a reply stream header |
|
197 |
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|
198 |
--for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end |
148 | 199 |
|
200 |
session.to_host = attr.to; |
|
201 |
session.from_host = attr.from; |
|
202 |
||
203 |
session.streamid = uuid_gen(); |
|
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204 |
(session.log or log)("debug", "incoming s2s received <stream:stream>"); |
148 | 205 |
send("<?xml version='1.0'?>"); |
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|
206 |
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()); |
331 | 207 |
if session.to_host and not hosts[session.to_host] then |
208 |
-- Attempting to connect to a host we don't serve |
|
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209 |
session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host }); |
331 | 210 |
return; |
211 |
end |
|
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|
212 |
if session.version >= 1.0 then |
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|
213 |
send(st.stanza("stream:features") |
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|
214 |
:tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up()); |
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|
215 |
end |
148 | 216 |
elseif session.direction == "outgoing" then |
217 |
-- If we are just using the connection for verifying dialback keys, we won't try and auth it |
|
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|
218 |
if not attr.id then error("stream response did not give us a streamid!!!"); end |
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|
219 |
session.streamid = attr.id; |
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|
220 |
|
148 | 221 |
if not session.dialback_verifying then |
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|
222 |
initiate_dialback(session); |
148 | 223 |
else |
224 |
mark_connected(session); |
|
225 |
end |
|
226 |
end |
|
259 | 227 |
|
148 | 228 |
session.notopen = nil; |
229 |
end |
|
230 |
||
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|
231 |
function initiate_dialback(session) |
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|
232 |
-- generate dialback key |
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|
233 |
session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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|
234 |
session.sends2s(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); |
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|
235 |
session.log("info", "sent dialback key on outgoing s2s stream"); |
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|
236 |
end |
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|
237 |
|
148 | 238 |
function generate_dialback(id, to, from) |
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|
239 |
return sha256_hash(id..to..from..dialback_secret, true); |
148 | 240 |
end |
241 |
||
242 |
function verify_dialback(id, to, from, key) |
|
243 |
return key == generate_dialback(id, to, from); |
|
244 |
end |
|
245 |
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|
246 |
function make_authenticated(session, host) |
148 | 247 |
if session.type == "s2sout_unauthed" then |
248 |
session.type = "s2sout"; |
|
249 |
elseif session.type == "s2sin_unauthed" then |
|
250 |
session.type = "s2sin"; |
|
621
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|
251 |
if host then |
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|
252 |
session.hosts[host].authed = true; |
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|
253 |
end |
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Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
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|
254 |
elseif session.type == "s2sin" and host then |
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|
255 |
session.hosts[host].authed = true; |
148 | 256 |
else |
257 |
return false; |
|
258 |
end |
|
259 |
session.log("info", "connection is now authenticated"); |
|
260 |
||
261 |
mark_connected(session); |
|
262 |
||
263 |
return true; |
|
264 |
end |
|
265 |
||
266 |
function mark_connected(session) |
|
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|
267 |
local sendq, send = session.sendq, session.sends2s; |
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|
268 |
|
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|
269 |
local from, to = session.from_host, session.to_host; |
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|
270 |
|
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|
271 |
session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
186
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272 |
|
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|
273 |
local send_to_host = send_to_host; |
190
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|
274 |
function session.send(data) send_to_host(to, from, data); end |
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275 |
|
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|
276 |
|
190
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|
277 |
if session.direction == "outgoing" then |
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|
278 |
if sendq then |
269
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Log how many queued stanzas we send
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|
279 |
session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
190
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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|
280 |
for i, data in ipairs(sendq) do |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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|
281 |
send(data); |
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|
282 |
sendq[i] = nil; |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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|
283 |
end |
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General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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|
284 |
session.sendq = nil; |
148 | 285 |
end |
286 |
end |
|
287 |
end |
|
288 |
||
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|
289 |
function destroy_session(session) |
169
92768120b717
Little tweak for more useful logging of closed s2s sessions
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parents:
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diff
changeset
|
290 |
(session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
331 | 291 |
|
292 |
-- FIXME: Flush sendq here/report errors to originators |
|
293 |
||
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|
294 |
if session.direction == "outgoing" then |
260
182f0c895676
Now outgoing s2s sessions are associated with their from_host, fixes #15
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|
295 |
hosts[session.from_host].s2sout[session.to_host] = nil; |
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|
296 |
elseif session.direction == "incoming" then |
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Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
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parents:
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changeset
|
297 |
incoming_s2s[session] = nil; |
164
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|
298 |
end |
331 | 299 |
|
164
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for k in pairs(session) do |
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if k ~= "trace" then |
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session[k] = nil; |
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end |
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end |
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end |
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Just committing this warning, because I want to know if the problem really affects us
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return _M; |