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core/s2smanager.lua @ 901:0e8934d3c4cb
net.xmppclient_listener: Set default namespace to jabber:client
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 21 Mar 2009 21:45:25 +0000 |
parent | 896:2c0b9e3c11c3 |
child | 931:4514ed5ee943 |
rev | line source |
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896 | 1 -- Prosody IM v0.4 |
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
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4 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
6 -- COPYING file in the source package for more information. | |
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7 -- |
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8 |
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9 |
148 | 10 |
11 local hosts = hosts; | |
12 local sessions = sessions; | |
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13 local core_process_stanza = function(a, b) core_process_stanza(a, b); end |
148 | 14 local socket = require "socket"; |
15 local format = string.format; | |
337 | 16 local t_insert, t_sort = table.insert, table.sort; |
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17 local get_traceback = debug.traceback; |
148 | 18 local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
19 = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
20 | |
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21 local idna_to_ascii = require "util.encodings".idna.to_ascii; |
148 | 22 local connlisteners_get = require "net.connlisteners".get; |
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23 local wrapclient = require "net.server".wrapclient; |
148 | 24 local modulemanager = require "core.modulemanager"; |
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25 local st = require "stanza"; |
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26 local stanza = st.stanza; |
148 | 27 |
28 local uuid_gen = require "util.uuid".generate; | |
29 | |
30 local logger_init = require "util.logger".init; | |
31 | |
32 local log = logger_init("s2smanager"); | |
33 | |
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34 local sha256_hash = require "util.hashes".sha256; |
148 | 35 |
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36 local dialback_secret = sha256_hash(tostring{} .. math.random() .. socket.gettime(), true); |
148 | 37 |
337 | 38 local dns = require "net.dns"; |
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39 |
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40 incoming_s2s = {}; |
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41 local incoming_s2s = incoming_s2s; |
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42 |
148 | 43 module "s2smanager" |
44 | |
337 | 45 local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end |
46 | |
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47 local function bounce_sendq(session) |
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48 local sendq = session.sendq; |
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49 if sendq then |
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50 session.log("debug", "sending error replies for "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host)); |
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51 local dummy = { |
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52 type = "s2sin"; |
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53 send = function(s) |
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54 (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", get_traceback()); |
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55 end; |
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56 dummy = true; |
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57 }; |
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58 for i, data in ipairs(sendq) do |
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59 local reply = data[2]; |
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60 local xmlns = reply.attr.xmlns; |
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61 if not xmlns or xmlns == "jabber:client" or xmlns == "jabber:server" then |
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62 reply.attr.type = "error"; |
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63 reply:tag("error", {type = "cancel"}) |
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64 :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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65 core_process_stanza(dummy, reply); |
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66 end |
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67 sendq[i] = nil; |
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68 end |
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69 session.sendq = nil; |
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70 end |
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71 end |
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72 |
148 | 73 function send_to_host(from_host, to_host, data) |
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74 local host = hosts[from_host].s2sout[to_host]; |
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75 if host then |
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76 -- We have a connection to this host already |
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77 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 |
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78 (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host); |
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79 if not host.notopen and not host.dialback_key then |
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80 host.log("debug", "dialback had not been initiated"); |
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81 initiate_dialback(host); |
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82 end |
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83 |
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84 -- Queue stanza until we are able to send it |
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85 if host.sendq then t_insert(host.sendq, {tostring(data), st.reply(data)}); |
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86 else host.sendq = { {tostring(data), st.reply(data)} }; end |
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87 host.log("debug", "stanza [%s] queued ", data.name); |
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88 elseif host.type == "local" or host.type == "component" then |
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89 log("error", "Trying to send a stanza to ourselves??") |
256 | 90 log("error", "Traceback: %s", get_traceback()); |
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91 log("error", "Stanza: %s", tostring(data)); |
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92 else |
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93 (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
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94 -- FIXME |
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95 if host.from_host ~= from_host then |
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96 log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
331 | 97 log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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98 end |
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99 host.sends2s(data); |
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100 host.log("debug", "stanza sent over "..host.type); |
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101 end |
148 | 102 else |
103 log("debug", "opening a new outgoing connection for this stanza"); | |
104 local host_session = new_outgoing(from_host, to_host); | |
105 -- Store in buffer | |
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106 host_session.sendq = { {tostring(data), st.reply(data)} }; |
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107 if not host_session.conn then destroy_session(host_session); end |
148 | 108 end |
109 end | |
110 | |
111 local open_sessions = 0; | |
112 | |
113 function new_incoming(conn) | |
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114 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming", hosts = {} }; |
148 | 115 if true then |
116 session.trace = newproxy(true); | |
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117 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end; |
148 | 118 end |
119 open_sessions = open_sessions + 1; | |
343 | 120 local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); |
121 session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end | |
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122 incoming_s2s[session] = true; |
148 | 123 return session; |
124 end | |
125 | |
126 function new_outgoing(from_host, to_host) | |
127 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
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128 hosts[from_host].s2sout[to_host] = host_session; |
148 | 129 |
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130 local log; |
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131 do |
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132 local conn_name = "s2sout"..tostring(host_session):match("[a-f0-9]*$"); |
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133 log = logger_init(conn_name); |
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134 host_session.log = log; |
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135 end |
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136 |
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137 attempt_connection(host_session); |
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138 |
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139 return host_session; |
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140 end |
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141 |
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142 |
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143 function attempt_connection(host_session, err) |
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144 local from_host, to_host = host_session.from_host, host_session.to_host; |
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145 local conn, handler = socket.tcp() |
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146 |
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147 local connect_host, connect_port = idna_to_ascii(to_host), 5269; |
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148 |
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149 if not err then -- This is our first attempt |
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150 local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV"); |
337 | 151 |
152 if answer then | |
153 log("debug", to_host.." has SRV records, handling..."); | |
154 local srv_hosts = {}; | |
155 host_session.srv_hosts = srv_hosts; | |
156 for _, record in ipairs(answer) do | |
157 t_insert(srv_hosts, record.srv); | |
158 end | |
159 t_sort(srv_hosts, compare_srv_priorities); | |
160 | |
161 local srv_choice = srv_hosts[1]; | |
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162 host_session.srv_choice = 1; |
337 | 163 if srv_choice then |
164 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; | |
165 log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); | |
166 end | |
167 end | |
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168 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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169 host_session.srv_choice = host_session.srv_choice + 1; |
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170 local srv_choice = host_session.srv_hosts[host_session.srv_choice]; |
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171 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
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172 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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173 else |
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174 host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); |
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175 -- We're out of options |
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176 return false; |
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177 end |
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178 |
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179 -- Ok, we're going to try to connect |
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180 conn:settimeout(0); |
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181 local success, err = conn:connect(connect_host, connect_port); |
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182 if not success and err ~= "timeout" then |
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183 log("warn", "s2s connect() failed: %s", err); |
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184 return false; |
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185 end |
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186 |
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187 local cl = connlisteners_get("xmppserver"); |
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188 conn = wrapclient(conn, connect_host, connect_port, cl, cl.default_mode or 1, hosts[from_host].ssl_ctx, false ); |
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189 host_session.conn = conn; |
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190 |
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191 -- Register this outgoing connection so that xmppserver_listener knows about it |
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192 -- otherwise it will assume it is a new incoming connection |
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193 cl.register_outgoing(conn, host_session); |
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194 |
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195 local w = conn.write; |
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196 host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end |
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197 |
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198 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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199 return true; |
148 | 200 end |
201 | |
202 function streamopened(session, attr) | |
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203 local send = session.sends2s; |
148 | 204 |
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205 -- TODO: #29: SASL/TLS on s2s streams |
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206 session.version = 0; --tonumber(attr.version) or 0; |
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207 |
148 | 208 if session.version >= 1.0 and not (attr.to and attr.from) then |
209 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
210 end | |
211 | |
212 if session.direction == "incoming" then | |
213 -- Send a reply stream header | |
214 session.to_host = attr.to; | |
215 session.from_host = attr.from; | |
216 | |
217 session.streamid = uuid_gen(); | |
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218 (session.log or log)("debug", "incoming s2s received <stream:stream>"); |
148 | 219 send("<?xml version='1.0'?>"); |
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220 send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', |
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221 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag()); |
331 | 222 if session.to_host and not hosts[session.to_host] then |
223 -- Attempting to connect to a host we don't serve | |
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224 session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host }); |
331 | 225 return; |
226 end | |
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227 if session.version >= 1.0 then |
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228 send(st.stanza("stream:features") |
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229 :tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up()); |
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230 end |
148 | 231 elseif session.direction == "outgoing" then |
232 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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233 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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234 session.streamid = attr.id; |
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235 |
148 | 236 if not session.dialback_verifying then |
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237 initiate_dialback(session); |
148 | 238 else |
239 mark_connected(session); | |
240 end | |
241 end | |
259 | 242 |
148 | 243 session.notopen = nil; |
244 end | |
245 | |
190
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246 function initiate_dialback(session) |
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247 -- generate dialback key |
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248 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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249 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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250 session.log("info", "sent dialback key on outgoing s2s stream"); |
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251 end |
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252 |
148 | 253 function generate_dialback(id, to, from) |
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254 return sha256_hash(id..to..from..dialback_secret, true); |
148 | 255 end |
256 | |
257 function verify_dialback(id, to, from, key) | |
258 return key == generate_dialback(id, to, from); | |
259 end | |
260 | |
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261 function make_authenticated(session, host) |
148 | 262 if session.type == "s2sout_unauthed" then |
263 session.type = "s2sout"; | |
264 elseif session.type == "s2sin_unauthed" then | |
265 session.type = "s2sin"; | |
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266 if host then |
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267 session.hosts[host].authed = true; |
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268 end |
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269 elseif session.type == "s2sin" and host then |
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270 session.hosts[host].authed = true; |
148 | 271 else |
272 return false; | |
273 end | |
274 session.log("info", "connection is now authenticated"); | |
275 | |
276 mark_connected(session); | |
277 | |
278 return true; | |
279 end | |
280 | |
281 function mark_connected(session) | |
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282 local sendq, send = session.sendq, session.sends2s; |
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283 |
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284 local from, to = session.from_host, session.to_host; |
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285 |
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286 session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
186
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287 |
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288 local send_to_host = send_to_host; |
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289 function session.send(data) send_to_host(to, from, data); end |
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290 |
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291 |
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292 if session.direction == "outgoing" then |
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293 if sendq then |
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294 session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
190
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295 for i, data in ipairs(sendq) do |
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296 send(data[1]); |
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297 sendq[i] = nil; |
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298 end |
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299 session.sendq = nil; |
148 | 300 end |
301 end | |
302 end | |
303 | |
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304 function destroy_session(session) |
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305 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
331 | 306 |
307 | |
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308 if session.direction == "outgoing" then |
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309 hosts[session.from_host].s2sout[session.to_host] = nil; |
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310 bounce_sendq(session); |
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Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
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311 elseif session.direction == "incoming" then |
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312 incoming_s2s[session] = nil; |
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313 end |
331 | 314 |
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315 for k in pairs(session) do |
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316 if k ~= "trace" then |
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317 session[k] = nil; |
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318 end |
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319 end |
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320 end |
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321 |
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Just committing this warning, because I want to know if the problem really affects us
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322 return _M; |