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1 |
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2 local hosts = hosts; |
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3 local sessions = sessions; |
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4 local socket = require "socket"; |
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5 local format = string.format; |
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6 local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
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7 = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; |
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8 |
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9 local connlisteners_get = require "net.connlisteners".get; |
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10 local wraptlsclient = require "net.server".wraptlsclient; |
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11 local modulemanager = require "core.modulemanager"; |
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12 |
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13 local uuid_gen = require "util.uuid".generate; |
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14 |
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15 local logger_init = require "util.logger".init; |
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16 |
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17 local log = logger_init("s2smanager"); |
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18 |
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19 local md5_hash = require "util.hashes".md5; |
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20 |
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21 local dialback_secret = "This is very secret!!! Ha!"; |
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22 |
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23 module "s2smanager" |
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24 |
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25 function connect_host(from_host, to_host) |
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26 end |
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27 |
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28 function send_to_host(from_host, to_host, data) |
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29 if hosts[to_host] then |
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30 -- Write to connection |
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31 hosts[to_host].send(data); |
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32 log("debug", "stanza sent over s2s"); |
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33 else |
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34 log("debug", "opening a new outgoing connection for this stanza"); |
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35 local host_session = new_outgoing(from_host, to_host); |
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36 -- Store in buffer |
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37 host_session.sendq = { data }; |
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38 end |
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39 end |
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40 |
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41 function disconnect_host(host) |
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42 |
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43 end |
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44 |
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45 local open_sessions = 0; |
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46 |
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47 function new_incoming(conn) |
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48 local session = { conn = conn, priority = 0, type = "s2sin_unauthed", direction = "incoming" }; |
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49 if true then |
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50 session.trace = newproxy(true); |
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51 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; |
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52 end |
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53 open_sessions = open_sessions + 1; |
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54 local w = conn.write; |
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55 session.send = function (t) w(tostring(t)); end |
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56 return session; |
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57 end |
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58 |
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59 function new_outgoing(from_host, to_host) |
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60 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; |
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61 hosts[to_host] = host_session; |
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62 |
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63 local cl = connlisteners_get("xmppserver"); |
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64 |
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65 local conn, handler = socket.tcp() |
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66 --FIXME: Below parameters (ports/ip) are incorrect (use SRV) |
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67 conn:connect(to_host, 5269); |
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68 conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); |
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69 host_session.conn = conn; |
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70 |
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71 -- Register this outgoing connection so that xmppserver_listener knows about it |
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72 -- otherwise it will assume it is a new incoming connection |
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73 cl.register_outgoing(conn, host_session); |
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74 |
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75 do |
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76 local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); |
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77 host_session.log = logger_init(conn_name); |
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78 end |
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79 |
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80 local w = conn.write; |
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81 host_session.send = function (t) w(tostring(t)); end |
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82 |
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83 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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84 |
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85 return host_session; |
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86 end |
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87 |
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88 function streamopened(session, attr) |
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89 session.log("debug", "s2s stream opened"); |
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90 local send = session.send; |
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91 |
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92 session.version = tonumber(attr.version) or 0; |
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93 if session.version >= 1.0 and not (attr.to and attr.from) then |
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94 print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); |
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95 --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); |
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96 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); |
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97 end |
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98 |
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99 if session.direction == "incoming" then |
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100 -- Send a reply stream header |
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101 |
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102 for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end |
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103 |
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104 session.to_host = attr.to; |
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105 session.from_host = attr.from; |
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106 |
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107 session.streamid = uuid_gen(); |
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108 print(session, session.from_host, "incoming s2s stream opened"); |
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109 send("<?xml version='1.0'?>"); |
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110 send(format("<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s'>", session.streamid, session.to_host)); |
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111 if session.from_host then |
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112 -- Need to perform dialback to check identity |
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113 print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); |
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114 print("Need to do dialback here you know!!"); |
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115 end |
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116 elseif session.direction == "outgoing" then |
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117 -- If we are just using the connection for verifying dialback keys, we won't try and auth it |
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118 if not session.dialback_verifying then |
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119 -- generate dialback key |
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120 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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121 session.streamid = attr.id; |
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122 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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123 session.send(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); |
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124 session.log("info", "sent dialback key on outgoing s2s stream"); |
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125 else |
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126 mark_connected(session); |
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127 end |
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128 end |
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129 --[[ |
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130 local features = {}; |
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131 modulemanager.fire_event("stream-features-s2s", session, features); |
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132 |
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133 send("<stream:features>"); |
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134 |
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135 for _, feature in ipairs(features) do |
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136 send(tostring(feature)); |
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137 end |
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138 |
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139 send("</stream:features>");]] |
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140 log("info", "s2s stream opened successfully"); |
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141 session.notopen = nil; |
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142 end |
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143 |
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144 function generate_dialback(id, to, from) |
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145 return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 |
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146 end |
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147 |
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148 function verify_dialback(id, to, from, key) |
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149 return key == generate_dialback(id, to, from); |
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150 end |
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151 |
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152 function make_authenticated(session) |
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153 if session.type == "s2sout_unauthed" then |
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154 session.type = "s2sout"; |
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155 elseif session.type == "s2sin_unauthed" then |
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156 session.type = "s2sin"; |
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157 else |
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158 return false; |
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159 end |
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160 session.log("info", "connection is now authenticated"); |
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161 |
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162 mark_connected(session); |
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163 |
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164 return true; |
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165 end |
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166 |
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167 function mark_connected(session) |
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168 local sendq, send = session.sendq, session.send; |
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169 if sendq then |
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170 session.log("debug", "sending queued stanzas across new connection"); |
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171 for _, data in ipairs(sendq) do |
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172 session.log("debug", "sending: %s", tostring(data)); |
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173 send(data); |
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174 end |
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175 end |
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176 end |
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177 |
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178 return _M; |