prosody
368754c54045
plugins/mod_component.lua

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plugins/mod_component.lua @ 1108:368754c54045

mod_component: Vastly reduce the code, having split most of it to where it should be, xmppcomponent_listener
author Matthew Wild <mwild1@gmail.com>
date Mon, 04 May 2009 19:36:16 +0100
parent 1065:3806173670f2
child 1405:19269d278c38
comparison
equal deleted inserted replaced
1107:ebda1845ebc1 1108:368754c54045
31 31
32 local component_listener = { default_port = 5347; default_mode = "*a"; default_interface = config.get("*", "core", "component_interface") or "127.0.0.1" }; 32 local component_listener = { default_port = 5347; default_mode = "*a"; default_interface = config.get("*", "core", "component_interface") or "127.0.0.1" };
33 33
34 local xmlns_component = 'jabber:component:accept'; 34 local xmlns_component = 'jabber:component:accept';
35 35
36 --- Callbacks/data for xmlhandlers to handle streams for us ---
37
38 local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", default_ns = xmlns_component };
39
40 function stream_callbacks.error(session, error, data, data2)
41 log("warn", "Error processing component stream: "..tostring(error));
42 if error == "no-stream" then
43 session:close("invalid-namespace");
44 elseif error == "xml-parse-error" and data == "unexpected-element-close" then
45 session.log("debug", "Unexpected close of '%s' tag", data2);
46 session:close("xml-not-well-formed");
47 else
48 session.log("debug", "External component %s XML parse error: %s", tostring(session.host), tostring(error));
49 print(data, debug.traceback())
50 session:close("xml-not-well-formed");
51 end
52 end
53
54 function stream_callbacks.streamopened(session, attr)
55 if config.get(attr.to, "core", "component_module") ~= "component" then
56 -- Trying to act as a component domain which
57 -- hasn't been configured
58 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" };
59 return;
60 end
61
62 -- Store the original host (this is used for config, etc.)
63 session.user = attr.to;
64 -- Set the host for future reference
65 session.host = config.get(attr.to, "core", "component_address") or attr.to;
66 -- Note that we don't create the internal component
67 -- until after the external component auths successfully
68
69 session.streamid = uuid_gen();
70 session.notopen = nil;
71
72 session.send(st.stanza("stream:stream", { xmlns=xmlns_component,
73 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag());
74
75 end
76
77 function stream_callbacks.streamclosed(session)
78 session.send("</stream:stream>");
79 session.notopen = true;
80 end
81
82 local core_process_stanza = core_process_stanza;
83
84 function stream_callbacks.handlestanza(session, stanza)
85 -- Namespaces are icky.
86 log("warn", "Handing stanza with name %s", stanza.name);
87 if stanza.name ~= "handshake" then
88 return core_process_stanza(session, stanza);
89 else
90 handle_component_auth(session, stanza);
91 end
92 end
93
94 --- Handle authentication attempts by components 36 --- Handle authentication attempts by components
95 function handle_component_auth(session, stanza) 37 function handle_component_auth(session, stanza)
38 log("info", "Handling component auth");
96 if (not session.host) or #stanza.tags > 0 then 39 if (not session.host) or #stanza.tags > 0 then
40 (session.log or log)("warn", "Component handshake invalid");
97 session:close("not-authorized"); 41 session:close("not-authorized");
98 return; 42 return;
99 end 43 end
100 44
101 local secret = config.get(session.user, "core", "component_secret"); 45 local secret = config.get(session.user, "core", "component_secret");
102 if not secret then 46 if not secret then
103 log("warn", "Component attempted to identify as %s, but component_password is not set", session.user); 47 (session.log or log)("warn", "Component attempted to identify as %s, but component_password is not set", session.user);
104 session:close("not-authorized"); 48 session:close("not-authorized");
105 return; 49 return;
106 end 50 end
107 51
108 local supplied_token = t_concat(stanza); 52 local supplied_token = t_concat(stanza);
109 local calculated_token = sha1(session.streamid..secret, true); 53 local calculated_token = sha1(session.streamid..secret, true);
110 if supplied_token:lower() ~= calculated_token:lower() then 54 if supplied_token:lower() ~= calculated_token:lower() then
55 log("info", "Component for %s authentication failed", session.host);
111 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" }; 56 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
112 return; 57 return;
113 end 58 end
114 59
115 60
116 -- Authenticated now 61 -- Authenticated now
62 log("info", "Component authenticated: %s", session.host);
117 63
118 -- If component not already created for this host, create one now 64 -- If component not already created for this host, create one now
119 if not hosts[session.host].connected then 65 if not hosts[session.host].connected then
120 local send = session.send; 66 local send = session.send;
121 session.component_session = cm_register_component(session.host, function (_, data) return send(data); end); 67 session.component_session = cm_register_component(session.host, function (_, data) return send(data); end);
122 hosts[session.host].connected = true; 68 hosts[session.host].connected = true;
69 log("info", "Component successfully registered");
123 else 70 else
124 log("error", "Multiple components bound to the same address, first one wins (TODO: Implement stanza distribution)"); 71 log("error", "Multiple components bound to the same address, first one wins (TODO: Implement stanza distribution)");
125 end 72 end
126 73
127 -- Signal successful authentication 74 -- Signal successful authentication
128 session.send(st.stanza("handshake")); 75 session.send(st.stanza("handshake"));
129 end 76 end
130 77
131 module:add_handler("component", "handshake", xmlns_component, handle_component_auth); 78 module:add_handler("component", "handshake", xmlns_component, handle_component_auth);
132
133 --- Closing a component connection
134 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
135 local function session_close(session, reason)
136 local log = session.log or log;
137 if session.conn then
138 if reason then
139 if type(reason) == "string" then -- assume stream error
140 log("info", "Disconnecting component, <stream:error> is: %s", reason);
141 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
142 elseif type(reason) == "table" then
143 if reason.condition then
144 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
145 if reason.text then
146 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
147 end
148 if reason.extra then
149 stanza:add_child(reason.extra);
150 end
151 log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
152 session.send(stanza);
153 elseif reason.name then -- a stanza
154 log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
155 session.send(reason);
156 end
157 end
158 end
159 session.send("</stream:stream>");
160 session.conn.close();
161 component_listener.disconnect(session.conn, "stream error");
162 end
163 end
164
165 --- Component connlistener
166 function component_listener.listener(conn, data)
167 local session = sessions[conn];
168 if not session then
169 local _send = conn.write;
170 session = { type = "component", conn = conn, send = function (data) return _send(tostring(data)); end };
171 sessions[conn] = session;
172
173 -- Logging functions --
174
175 local conn_name = "xep114-"..tostring(conn):match("[a-f0-9]+$");
176 session.log = logger.init(conn_name);
177 session.close = session_close;
178
179 session.log("info", "Incoming XEP-0114 connection");
180
181 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
182 session.parser = parser;
183
184 session.notopen = true;
185
186 function session.data(conn, data)
187 local ok, err = parser:parse(data);
188 if ok then return; end
189 session:close("xml-not-well-formed");
190 end
191
192 session.dispatch_stanza = stream_callbacks.handlestanza;
193
194 end
195 if data then
196 session.data(conn, data);
197 end
198 end
199
200 function component_listener.disconnect(conn, err)
201 local session = sessions[conn];
202 if session then
203 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
204 if session.host then
205 log("debug", "deregistering component");
206 cm_deregister_component(session.host);
207 hosts[session.host].connected = nil;
208 end
209 sessions[conn] = nil;
210 session = nil;
211 collectgarbage("collect");
212 end
213 end
214
215 connlisteners.register('component', component_listener);
216
217 module:add_event_hook("server-started",
218 function ()
219 if _G.net_activate_ports then
220 _G.net_activate_ports("component", "component", {5437}, "tcp");
221 else
222 error("No net_activate_ports: Using an incompatible version of Prosody?");
223 end
224 end);