Software / code / prosody
Annotate
core/stanza_router.lua @ 105:b099f0f80775
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| author | Waqas Hussain <waqas20@gmail.com> |
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| date | Tue, 14 Oct 2008 09:56:14 +0500 |
| parent | 83:79608fc8f98d |
| child | 106:f2a3d204a76a |
| rev | line source |
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| 30 | 1 |
| 2 -- The code in this file should be self-explanatory, though the logic is horrible | |
| 3 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense | |
| 4 -- the rules from the RFCs (mainly 3921) | |
| 5 | |
| 6 require "core.servermanager" | |
| 7 | |
| 8 local log = require "util.logger".init("stanzarouter") | |
| 9 | |
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10 local st = require "util.stanza"; |
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11 local send = require "core.sessionmanager".send_to_session; |
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12 |
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13 local jid_split = require "util.jid".split; |
| 30 | 14 |
| 15 function core_process_stanza(origin, stanza) | |
| 66 | 16 log("debug", "Received: "..tostring(stanza)) |
| 73 | 17 -- TODO verify validity of stanza (as well as JID validity) |
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18 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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19 error("Invalid IQ"); |
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20 end |
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21 |
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22 if origin.type == "c2s" and not origin.full_jid |
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23 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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24 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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25 error("Client MUST bind resource after auth"); |
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26 end |
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27 |
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28 |
| 30 | 29 local to = stanza.attr.to; |
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30 stanza.attr.from = origin.full_jid -- quick fix to prevent impersonation |
| 30 | 31 |
| 32 if not to or (hosts[to] and hosts[to].type == "local") then | |
| 33 core_handle_stanza(origin, stanza); | |
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34 elseif to and stanza.name == "iq" and not select(3, jid_split(to)) then |
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35 core_handle_stanza(origin, stanza); |
| 30 | 36 elseif origin.type == "c2s" then |
| 37 core_route_stanza(origin, stanza); | |
| 38 end | |
| 39 end | |
| 40 | |
| 41 function core_handle_stanza(origin, stanza) | |
| 42 -- Handlers | |
| 43 if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
| 44 local session = origin; | |
| 45 stanza.attr.from = session.full_jid; | |
| 46 | |
| 47 log("debug", "Routing stanza"); | |
| 48 -- Stanza has no to attribute | |
| 49 --local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
| 50 --if not to_host then error("Invalid destination JID: "..string.format("{ %q, %q, %q } == %q", to_node or "", to_host or "", to_resource or "", stanza.attr.to or "nil")); end | |
| 51 | |
| 52 -- Stanza is to this server, or a user on this server | |
| 53 log("debug", "Routing stanza to local"); | |
| 54 handle_stanza(session, stanza); | |
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55 end |
| 30 | 56 end |
| 57 | |
| 58 function core_route_stanza(origin, stanza) | |
| 59 -- Hooks | |
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60 --- ...later |
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61 |
| 30 | 62 -- Deliver |
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63 local node, host, resource = jid_split(stanza.attr.to); |
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64 local host_session = hosts[host] |
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65 if host_session and host_session.type == "local" then |
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66 -- Local host |
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67 local user = host_session.sessions[node]; |
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68 if user then |
| 72 | 69 local res = user.sessions[resource]; |
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70 -- TODO do something about presence broadcast |
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71 if not res then |
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72 -- if we get here, resource was not specified or was unavailable |
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73 for k in pairs(user.sessions) do |
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74 res = user.sessions[k]; |
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75 break; |
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76 end |
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77 -- TODO find resource with greatest priority |
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78 end |
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79 stanza.attr.to = res.full_jid; |
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80 send(res, stanza); -- Yay \o/ |
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81 else |
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82 -- user not found |
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83 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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84 end |
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85 else |
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86 -- Remote host |
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87 if host_session then |
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88 -- Send to session |
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89 else |
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90 -- Need to establish the connection |
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91 end |
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92 end |
| 30 | 93 end |
| 94 | |
| 95 function handle_stanza_nodest(stanza) | |
| 96 if stanza.name == "iq" then | |
| 97 handle_stanza_iq_no_to(session, stanza); | |
| 98 elseif stanza.name == "presence" then | |
| 99 -- Broadcast to this user's contacts | |
| 100 handle_stanza_presence_broadcast(session, stanza); | |
| 101 -- also, if it is initial presence, send out presence probes | |
| 102 if not session.last_presence then | |
| 103 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 104 end | |
| 105 session.last_presence = stanza; | |
| 106 elseif stanza.name == "message" then | |
| 107 -- Treat as if message was sent to bare JID of the sender | |
| 108 handle_stanza_to_local_user(stanza); | |
| 109 end | |
| 110 end | |
| 111 | |
| 112 function handle_stanza_tolocal(stanza) | |
| 113 local node, host, resource = jid.split(stanza.attr.to); | |
| 114 if host and hosts[host] and hosts[host].type == "local" then | |
| 115 -- Is a local host, handle internally | |
| 116 if node then | |
| 117 -- Is a local user, send to their session | |
| 118 log("debug", "Routing stanza to %s@%s", node, host); | |
| 119 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 120 handle_stanza_to_local_user(stanza); | |
| 121 else | |
| 122 -- Is sent to this server, let's handle it... | |
| 123 log("debug", "Routing stanza to %s", host); | |
| 124 handle_stanza_to_server(stanza, session); | |
| 125 end | |
| 126 end | |
| 127 end | |
| 128 | |
| 129 function handle_stanza_toremote(stanza) | |
| 130 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 131 end | |
| 132 | |
| 133 | |
| 134 --[[ | |
| 135 local function route_c2s_stanza(session, stanza) | |
| 136 stanza.attr.from = session.full_jid; | |
| 137 if not stanza.attr.to and session.username then | |
| 138 -- Has no 'to' attribute, handle internally | |
| 139 if stanza.name == "iq" then | |
| 140 handle_stanza_iq_no_to(session, stanza); | |
| 141 elseif stanza.name == "presence" then | |
| 142 -- Broadcast to this user's contacts | |
| 143 handle_stanza_presence_broadcast(session, stanza); | |
| 144 -- also, if it is initial presence, send out presence probes | |
| 145 if not session.last_presence then | |
| 146 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 147 end | |
| 148 session.last_presence = stanza; | |
| 149 elseif stanza.name == "message" then | |
| 150 -- Treat as if message was sent to bare JID of the sender | |
| 151 handle_stanza_to_local_user(stanza); | |
| 152 end | |
| 153 end | |
| 154 local node, host, resource = jid.split(stanza.attr.to); | |
| 155 if host and hosts[host] and hosts[host].type == "local" then | |
| 156 -- Is a local host, handle internally | |
| 157 if node then | |
| 158 -- Is a local user, send to their session | |
| 159 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 160 handle_stanza_to_local_user(stanza); | |
| 161 else | |
| 162 -- Is sent to this server, let's handle it... | |
| 163 handle_stanza_to_server(stanza, session); | |
| 164 end | |
| 165 else | |
| 166 -- Is not for us or a local user, route accordingly | |
| 167 route_s2s_stanza(stanza); | |
| 168 end | |
| 169 end | |
| 170 | |
| 171 function handle_stanza_no_to(session, stanza) | |
| 172 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
| 173 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
| 174 if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
| 175 if iq_handlers[xmlns] then | |
| 176 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
| 177 end | |
| 178 -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
| 179 log("warn", "Unhandled namespace: "..xmlns); | |
| 180 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
| 181 return; -- All done! | |
| 182 end | |
| 183 end | |
| 184 | |
| 185 function handle_stanza_to_local_user(stanza) | |
| 186 if stanza.name == "message" then | |
| 187 handle_stanza_message_to_local_user(stanza); | |
| 188 elseif stanza.name == "presence" then | |
| 189 handle_stanza_presence_to_local_user(stanza); | |
| 190 elseif stanza.name == "iq" then | |
| 191 handle_stanza_iq_to_local_user(stanza); | |
| 192 end | |
| 193 end | |
| 194 | |
| 195 function handle_stanza_message_to_local_user(stanza) | |
| 196 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 197 local destuser = hosts[host].sessions[node]; | |
| 198 if destuser then | |
| 199 if resource and destuser[resource] then | |
| 200 destuser[resource]:send(stanza); | |
| 201 else | |
| 202 -- Bare JID, or resource offline | |
| 203 local best_session; | |
| 204 for resource, session in pairs(destuser.sessions) do | |
| 205 if not best_session then best_session = session; | |
| 206 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 207 best_session = session; | |
| 208 end | |
| 209 end | |
| 210 if not best_session then | |
| 211 offlinemessage.new(node, host, stanza); | |
| 212 else | |
| 213 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 214 destuser[best_session]:send(stanza); | |
| 215 end | |
| 216 end | |
| 217 else | |
| 218 -- User is offline | |
| 219 offlinemessage.new(node, host, stanza); | |
| 220 end | |
| 221 end | |
| 222 | |
| 223 function handle_stanza_presence_to_local_user(stanza) | |
| 224 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 225 local destuser = hosts[host].sessions[node]; | |
| 226 if destuser then | |
| 227 if resource then | |
| 228 if destuser[resource] then | |
| 229 destuser[resource]:send(stanza); | |
| 230 else | |
| 231 return; | |
| 232 end | |
| 233 else | |
| 234 -- Broadcast to all user's resources | |
| 235 for resource, session in pairs(destuser.sessions) do | |
| 236 session:send(stanza); | |
| 237 end | |
| 238 end | |
| 239 end | |
| 240 end | |
| 241 | |
| 242 function handle_stanza_iq_to_local_user(stanza) | |
| 243 | |
| 244 end | |
| 245 | |
| 246 function foo() | |
| 247 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 248 local destuser = hosts[host].sessions[node]; | |
| 249 if destuser and destuser.sessions then | |
| 250 -- User online | |
| 251 if resource and destuser.sessions[resource] then | |
| 252 stanza.to:send(stanza); | |
| 253 else | |
| 254 --User is online, but specified resource isn't (or no resource specified) | |
| 255 local best_session; | |
| 256 for resource, session in pairs(destuser.sessions) do | |
| 257 if not best_session then best_session = session; | |
| 258 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 259 best_session = session; | |
| 260 end | |
| 261 end | |
| 262 if not best_session then | |
| 263 offlinemessage.new(node, host, stanza); | |
| 264 else | |
| 265 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 266 resource = best_session.resource; | |
| 267 end | |
| 268 end | |
| 269 if destuser.sessions[resource] == session then | |
| 270 log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
| 271 else | |
| 272 print("...sending...", tostring(stanza)); | |
| 273 --destuser.sessions[resource].conn.write(tostring(data)); | |
| 274 print(" to conn ", destuser.sessions[resource].conn); | |
| 275 destuser.sessions[resource].conn.write(tostring(stanza)); | |
| 276 print("...sent") | |
| 277 end | |
| 278 elseif stanza.name == "message" then | |
| 279 print(" ...will be stored offline"); | |
| 280 offlinemessage.new(node, host, stanza); | |
| 281 elseif stanza.name == "iq" then | |
| 282 print(" ...is an iq"); | |
| 283 stanza.from:send(st.reply(stanza) | |
| 284 :tag("error", { type = "cancel" }) | |
| 285 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
| 286 end | |
| 287 end | |
| 288 | |
| 289 -- Broadcast a presence stanza to all of a user's contacts | |
| 290 function handle_stanza_presence_broadcast(session, stanza) | |
| 291 if session.roster then | |
| 292 local initial_presence = not session.last_presence; | |
| 293 session.last_presence = stanza; | |
| 294 | |
| 295 -- Broadcast presence and probes | |
| 296 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
| 297 | |
| 298 for child in stanza:childtags() do | |
| 299 broadcast:add_child(child); | |
| 300 end | |
| 301 for contact_jid in pairs(session.roster) do | |
| 302 broadcast.attr.to = contact_jid; | |
| 303 send_to(contact_jid, broadcast); | |
| 304 if initial_presence then | |
| 305 local node, host = jid.split(contact_jid); | |
| 306 if hosts[host] and hosts[host].type == "local" then | |
| 307 local contact = hosts[host].sessions[node] | |
| 308 if contact then | |
| 309 local pres = st.presence { to = session.full_jid }; | |
| 310 for resource, contact_session in pairs(contact.sessions) do | |
| 311 if contact_session.last_presence then | |
| 312 pres.tags = contact_session.last_presence.tags; | |
| 313 pres.attr.from = contact_session.full_jid; | |
| 314 send(pres); | |
| 315 end | |
| 316 end | |
| 317 end | |
| 318 --FIXME: Do we send unavailable if they are offline? | |
| 319 else | |
| 320 probe.attr.to = contact; | |
| 321 send_to(contact, probe); | |
| 322 end | |
| 323 end | |
| 324 end | |
| 325 | |
| 326 -- Probe for our contacts' presence | |
| 327 end | |
| 328 end | |
| 329 | |
| 330 -- Broadcast presence probes to all of a user's contacts | |
| 331 function handle_stanza_presence_probe_broadcast(session, stanza) | |
| 332 end | |
| 333 | |
| 334 -- | |
| 335 function handle_stanza_to_server(stanza) | |
| 336 end | |
| 337 | |
| 338 function handle_stanza_iq_no_to(session, stanza) | |
| 339 end | |
| 340 ]] |
