prosody
3e3171b59028
main.lua

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Software / code / prosody

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main.lua @ 0:3e3171b59028

First commit, where do you want to go tomorrow?
author matthew
date Fri, 22 Aug 2008 21:09:04 +0000
child 1:b8787e859fd2
comparison
equal deleted inserted replaced
-1:000000000000 0:3e3171b59028
1 require "luarocks.require"
2
3 require "copas"
4 require "socket"
5 require "ssl"
6 require "lxp"
7
8 function log(type, area, message)
9 print(type, area, message);
10 end
11
12 require "core.stanza_dispatch"
13 require "core.rostermanager"
14 require "core.offlinemessage"
15 require "util.stanza"
16 require "util.jid"
17
18 -- Locals for faster access --
19 local t_insert = table.insert;
20 local t_concat = table.concat;
21 local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end
22 local m_random = math.random;
23 local format = string.format;
24 local st = stanza;
25 ------------------------------
26
27 users = {};
28 hosts = {
29 ["localhost"] = {
30 type = "local";
31 connected = true;
32 sessions = {};
33 };
34 ["getjabber.ath.cx"] = {
35 type = "local";
36 connected = true;
37 sessions = {};
38 };
39 }
40
41 local hosts, users = hosts, users;
42
43 local ssl_ctx, msg = ssl.newcontext { mode = "server", protocol = "sslv23", key = "/home/matthew/ssl_cert/server.key",
44 certificate = "/home/matthew/ssl_cert/server.crt", capath = "/etc/ssl/certs", verify = "none", }
45
46 if not ssl_ctx then error("Failed to initialise SSL/TLS support: "..tostring(msg)); end
47
48
49 function connect_host(host)
50 hosts[host] = { type = "remote", sendbuffer = {} };
51 end
52
53 function handler(conn)
54 local copas_receive, copas_send = copas.receive, copas.send;
55 local reqdata, sktmsg;
56 local session = { sendbuffer = { external = {} }, conn = conn, notopen = true, priority = 0 }
57
58
59 -- Logging functions --
60
61 local mainlog, log = log;
62 do
63 local conn_name = tostring(conn):match("%w+$");
64 log = function (type, area, message) mainlog(type, conn_name, message); end
65 end
66 local print = function (...) log("info", "core", t_concatall({...}, "\t")); end
67 session.log = log;
68
69 -- -- --
70
71 -- Send buffers --
72
73 local sendbuffer = session.sendbuffer;
74 local send = function (data) return t_insert(sendbuffer, tostring(data)); end;
75 local send_to = function (to, stanza)
76 local node, host, resource = jid.split(to);
77 print("Routing stanza to "..to..":", node, host, resource);
78 if not hosts[host] then
79 print(" ...but host offline, establishing connection");
80 connect_host(host);
81 t_insert(hosts[host].sendbuffer, stanza); -- This will be sent when s2s connection succeeds
82 elseif hosts[host].connected then
83 print(" ...putting in our external send buffer");
84 t_insert(sendbuffer.external, { node = node, host = host, resource = resource, data = stanza});
85 print(" ...there are now "..tostring(#sendbuffer.external).." stanzas in the external send buffer");
86 end
87 end
88 session.send, session.send_to = send, send_to;
89
90 -- -- --
91 print("Client connected");
92 conn = ssl.wrap(copas.wrap(conn), ssl_ctx);
93
94 do
95 local succ, msg
96 conn:settimeout(15)
97 while not succ do
98 succ, msg = conn:dohandshake()
99 if not succ then
100 print("SSL: "..tostring(msg));
101 if msg == 'wantread' then
102 socket.select({conn}, nil)
103 elseif msg == 'wantwrite' then
104 socket.select(nil, {conn})
105 else
106 -- other error
107 end
108 end
109 end
110 end
111 print("SSL handshake complete");
112 -- XML parser initialisation --
113
114 local parser;
115 local stanza;
116
117 local stanza_dispatch = init_stanza_dispatcher(session);
118
119 local xml_handlers = {};
120
121 do
122 local ns_stack = { "" };
123 local curr_ns = "";
124 local curr_tag;
125 function xml_handlers:StartElement(name, attr)
126 curr_ns,name = name:match("^(.+):(%w+)$");
127 print("Tag received:", name, tostring(curr_ns));
128 if not stanza then
129 if session.notopen then
130 if name == "stream" then
131 session.host = attr.to or error("Client failed to specify destination hostname");
132 session.version = attr.version or 0;
133 session.streamid = m_random(1000000, 99999999);
134 print(session, session.host, "Client opened stream");
135 send("<?xml version='1.0'?>");
136 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' >", session.streamid, session.host));
137 --send("<stream:features>");
138 --send("<mechanism>PLAIN</mechanism>");
139 --send [[<register xmlns="http://jabber.org/features/iq-register"/> ]]
140 --send("</stream:features>");
141 log("info", "core", "Stream opened successfully");
142 session.notopen = nil;
143 return;
144 end
145 error("Client failed to open stream successfully");
146 end
147 if name ~= "iq" and name ~= "presence" and name ~= "message" then
148 error("Client sent invalid top-level stanza");
149 end
150 stanza = st.stanza(name, { to = attr.to, type = attr.type, id = attr.id, xmlns = curr_ns });
151 curr_tag = stanza;
152 else
153 attr.xmlns = curr_ns;
154 stanza:tag(name, attr);
155 end
156 end
157 function xml_handlers:CharacterData(data)
158 if data:match("%S") then
159 stanza:text(data);
160 end
161 end
162 function xml_handlers:EndElement(name)
163 curr_ns,name = name:match("^(.+):(%w+)$");
164 --print("<"..name.."/>", tostring(stanza), tostring(#stanza.last_add < 1), tostring(stanza.last_add[#stanza.last_add].name));
165 if (not stanza) or #stanza.last_add < 0 or (#stanza.last_add > 0 and name ~= stanza.last_add[#stanza.last_add].name) then error("XML parse error in client stream"); end
166 -- Complete stanza
167 print(name, tostring(#stanza.last_add));
168 if #stanza.last_add == 0 then
169 stanza_dispatch(stanza);
170 stanza = nil;
171 else
172 stanza:up();
173 end
174 end
175 --[[ function xml_handlers:StartNamespaceDecl(namespace)
176 table.insert(ns_stack, namespace);
177 curr_ns = namespace;
178 log("debug", "parser", "Entering namespace "..tostring(curr_ns));
179 end
180 function xml_handlers:EndNamespaceDecl(namespace)
181 table.remove(ns_stack);
182 log("debug", "parser", "Leaving namespace "..tostring(curr_ns));
183 curr_ns = ns_stack[#ns_stack];
184 log("debug", "parser", "Entering namespace "..tostring(curr_ns));
185 end
186 ]]
187 end
188 parser = lxp.new(xml_handlers, ":");
189
190 -- -- --
191
192 -- Main loop --
193 print "Receiving..."
194 reqdata = copas_receive(conn, 1);
195 print "Received"
196 while reqdata do
197 parser:parse(reqdata);
198 if #sendbuffer.external > 0 then
199 -- Stanzas queued to go to other places, from us
200 -- ie. other local users, or remote hosts that weren't connected before
201 print(#sendbuffer.external.." stanzas queued for other recipients, sending now...");
202 for n, packet in pairs(sendbuffer.external) do
203 if not hosts[packet.host] then
204 connect_host(packet.host);
205 t_insert(hosts[packet.host].sendbuffer, packet.data);
206 elseif hosts[packet.host].type == "local" then
207 print(" ...is to a local user")
208 local destuser = hosts[packet.host].sessions[packet.node];
209 if destuser and destuser.sessions then
210 if not destuser.sessions[packet.resource] then
211 local best_resource;
212 for resource, session in pairs(destuser.sessions) do
213 if not best_session then best_session = session;
214 elseif session.priority >= best_session.priority and session.priority >= 0 then
215 best_session = session;
216 end
217 end
218 if not best_session then
219 offlinemessage.new(packet.node, packet.host, packet.data);
220 else
221 print("resource '"..packet.resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
222 packet.resource = best_session.resource;
223 end
224 end
225 if destuser.sessions[packet.resource] == session then
226 log("warn", "core", "Attempt to send stanza to self, dropping...");
227 else
228 print("...sending...");
229 copas_send(destuser.sessions[packet.resource].conn, tostring(packet.data));
230 print("...sent")
231 end
232 elseif packet.data.name == "message" then
233 print(" ...will be stored offline");
234 offlinemessage.new(packet.node, packet.host, packet.data);
235 elseif packet.data.name == "iq" then
236 print(" ...is an iq");
237 send(st.reply(packet.data)
238 :tag("error", { type = "cancel" })
239 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
240 end
241 print(" ...removing from send buffer");
242 sendbuffer.external[n] = nil;
243 end
244 end
245 end
246
247 if #sendbuffer > 0 then
248 for n, data in ipairs(sendbuffer) do
249 print "Sending..."
250 copas_send(conn, data);
251 print "Sent"
252 sendbuffer[n] = nil;
253 end
254 end
255 print "Receiving..."
256 repeat
257 reqdata, sktmsg = copas_receive(conn, 1);
258 if sktmsg == 'wantread' then
259 print("Received... wantread");
260 --socket.select({conn}, nil)
261 --print("Socket ready now...");
262 elseif sktmsg then
263 print("Received socket message:", sktmsg);
264 end
265 until reqdata or sktmsg == "closed";
266 print("Received", tostring(reqdata));
267 end
268 log("info", "core", "Client disconnected, connection closed");
269 end
270
271 server = socket.bind("*", 5223)
272 assert(server, "Failed to bind to socket")
273 copas.addserver(server, handler)
274
275 copas.loop();