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core/stanza_router.lua @ 86:a2085854c72c
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| author | Waqas Hussain <waqas20@gmail.com> |
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| date | Thu, 09 Oct 2008 02:59:57 +0500 |
| parent | 83:79608fc8f98d |
| child | 105:b099f0f80775 |
| 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 |
| 30 | 13 require "util.jid" |
| 14 local jid_split = jid.split; | |
| 15 | |
| 16 function core_process_stanza(origin, stanza) | |
| 66 | 17 log("debug", "Received: "..tostring(stanza)) |
| 73 | 18 -- TODO verify validity of stanza (as well as JID validity) |
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19 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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20 error("Invalid IQ"); |
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21 end |
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22 |
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23 if origin.type == "c2s" and not origin.full_jid |
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24 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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25 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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26 error("Client MUST bind resource after auth"); |
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27 end |
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28 |
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29 |
| 30 | 30 local to = stanza.attr.to; |
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31 stanza.attr.from = origin.full_jid -- quick fix to prevent impersonation |
| 30 | 32 |
| 33 if not to or (hosts[to] and hosts[to].type == "local") then | |
| 34 core_handle_stanza(origin, stanza); | |
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35 elseif to and stanza.name == "iq" and not select(3, jid_split(to)) then |
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36 core_handle_stanza(origin, stanza); |
| 30 | 37 elseif origin.type == "c2s" then |
| 38 core_route_stanza(origin, stanza); | |
| 39 end | |
| 40 end | |
| 41 | |
| 42 function core_handle_stanza(origin, stanza) | |
| 43 -- Handlers | |
| 44 if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
| 45 local session = origin; | |
| 46 stanza.attr.from = session.full_jid; | |
| 47 | |
| 48 log("debug", "Routing stanza"); | |
| 49 -- Stanza has no to attribute | |
| 50 --local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
| 51 --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 | |
| 52 | |
| 53 -- Stanza is to this server, or a user on this server | |
| 54 log("debug", "Routing stanza to local"); | |
| 55 handle_stanza(session, stanza); | |
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56 end |
| 30 | 57 end |
| 58 | |
| 59 function core_route_stanza(origin, stanza) | |
| 60 -- Hooks | |
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61 --- ...later |
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62 |
| 30 | 63 -- Deliver |
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64 local node, host, resource = jid_split(stanza.attr.to); |
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65 local host_session = hosts[host] |
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66 if host_session and host_session.type == "local" then |
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67 -- Local host |
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68 local user = host_session.sessions[node]; |
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69 if user then |
| 72 | 70 local res = user.sessions[resource]; |
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71 -- TODO do something about presence broadcast |
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72 if not res then |
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73 -- if we get here, resource was not specified or was unavailable |
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74 for k in pairs(user.sessions) do |
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75 res = user.sessions[k]; |
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76 break; |
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77 end |
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78 -- TODO find resource with greatest priority |
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79 end |
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80 stanza.attr.to = res.full_jid; |
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81 send(res, stanza); -- Yay \o/ |
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82 else |
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83 -- user not found |
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84 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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85 end |
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86 else |
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87 -- Remote host |
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88 if host_session then |
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89 -- Send to session |
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90 else |
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91 -- Need to establish the connection |
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92 end |
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93 end |
| 30 | 94 end |
| 95 | |
| 96 function handle_stanza_nodest(stanza) | |
| 97 if stanza.name == "iq" then | |
| 98 handle_stanza_iq_no_to(session, stanza); | |
| 99 elseif stanza.name == "presence" then | |
| 100 -- Broadcast to this user's contacts | |
| 101 handle_stanza_presence_broadcast(session, stanza); | |
| 102 -- also, if it is initial presence, send out presence probes | |
| 103 if not session.last_presence then | |
| 104 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 105 end | |
| 106 session.last_presence = stanza; | |
| 107 elseif stanza.name == "message" then | |
| 108 -- Treat as if message was sent to bare JID of the sender | |
| 109 handle_stanza_to_local_user(stanza); | |
| 110 end | |
| 111 end | |
| 112 | |
| 113 function handle_stanza_tolocal(stanza) | |
| 114 local node, host, resource = jid.split(stanza.attr.to); | |
| 115 if host and hosts[host] and hosts[host].type == "local" then | |
| 116 -- Is a local host, handle internally | |
| 117 if node then | |
| 118 -- Is a local user, send to their session | |
| 119 log("debug", "Routing stanza to %s@%s", node, host); | |
| 120 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 121 handle_stanza_to_local_user(stanza); | |
| 122 else | |
| 123 -- Is sent to this server, let's handle it... | |
| 124 log("debug", "Routing stanza to %s", host); | |
| 125 handle_stanza_to_server(stanza, session); | |
| 126 end | |
| 127 end | |
| 128 end | |
| 129 | |
| 130 function handle_stanza_toremote(stanza) | |
| 131 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 132 end | |
| 133 | |
| 134 | |
| 135 --[[ | |
| 136 local function route_c2s_stanza(session, stanza) | |
| 137 stanza.attr.from = session.full_jid; | |
| 138 if not stanza.attr.to and session.username then | |
| 139 -- Has no 'to' attribute, handle internally | |
| 140 if stanza.name == "iq" then | |
| 141 handle_stanza_iq_no_to(session, stanza); | |
| 142 elseif stanza.name == "presence" then | |
| 143 -- Broadcast to this user's contacts | |
| 144 handle_stanza_presence_broadcast(session, stanza); | |
| 145 -- also, if it is initial presence, send out presence probes | |
| 146 if not session.last_presence then | |
| 147 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 148 end | |
| 149 session.last_presence = stanza; | |
| 150 elseif stanza.name == "message" then | |
| 151 -- Treat as if message was sent to bare JID of the sender | |
| 152 handle_stanza_to_local_user(stanza); | |
| 153 end | |
| 154 end | |
| 155 local node, host, resource = jid.split(stanza.attr.to); | |
| 156 if host and hosts[host] and hosts[host].type == "local" then | |
| 157 -- Is a local host, handle internally | |
| 158 if node then | |
| 159 -- Is a local user, send to their session | |
| 160 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 161 handle_stanza_to_local_user(stanza); | |
| 162 else | |
| 163 -- Is sent to this server, let's handle it... | |
| 164 handle_stanza_to_server(stanza, session); | |
| 165 end | |
| 166 else | |
| 167 -- Is not for us or a local user, route accordingly | |
| 168 route_s2s_stanza(stanza); | |
| 169 end | |
| 170 end | |
| 171 | |
| 172 function handle_stanza_no_to(session, stanza) | |
| 173 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
| 174 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
| 175 if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
| 176 if iq_handlers[xmlns] then | |
| 177 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
| 178 end | |
| 179 -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
| 180 log("warn", "Unhandled namespace: "..xmlns); | |
| 181 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
| 182 return; -- All done! | |
| 183 end | |
| 184 end | |
| 185 | |
| 186 function handle_stanza_to_local_user(stanza) | |
| 187 if stanza.name == "message" then | |
| 188 handle_stanza_message_to_local_user(stanza); | |
| 189 elseif stanza.name == "presence" then | |
| 190 handle_stanza_presence_to_local_user(stanza); | |
| 191 elseif stanza.name == "iq" then | |
| 192 handle_stanza_iq_to_local_user(stanza); | |
| 193 end | |
| 194 end | |
| 195 | |
| 196 function handle_stanza_message_to_local_user(stanza) | |
| 197 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 198 local destuser = hosts[host].sessions[node]; | |
| 199 if destuser then | |
| 200 if resource and destuser[resource] then | |
| 201 destuser[resource]:send(stanza); | |
| 202 else | |
| 203 -- Bare JID, or resource offline | |
| 204 local best_session; | |
| 205 for resource, session in pairs(destuser.sessions) do | |
| 206 if not best_session then best_session = session; | |
| 207 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 208 best_session = session; | |
| 209 end | |
| 210 end | |
| 211 if not best_session then | |
| 212 offlinemessage.new(node, host, stanza); | |
| 213 else | |
| 214 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 215 destuser[best_session]:send(stanza); | |
| 216 end | |
| 217 end | |
| 218 else | |
| 219 -- User is offline | |
| 220 offlinemessage.new(node, host, stanza); | |
| 221 end | |
| 222 end | |
| 223 | |
| 224 function handle_stanza_presence_to_local_user(stanza) | |
| 225 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 226 local destuser = hosts[host].sessions[node]; | |
| 227 if destuser then | |
| 228 if resource then | |
| 229 if destuser[resource] then | |
| 230 destuser[resource]:send(stanza); | |
| 231 else | |
| 232 return; | |
| 233 end | |
| 234 else | |
| 235 -- Broadcast to all user's resources | |
| 236 for resource, session in pairs(destuser.sessions) do | |
| 237 session:send(stanza); | |
| 238 end | |
| 239 end | |
| 240 end | |
| 241 end | |
| 242 | |
| 243 function handle_stanza_iq_to_local_user(stanza) | |
| 244 | |
| 245 end | |
| 246 | |
| 247 function foo() | |
| 248 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 249 local destuser = hosts[host].sessions[node]; | |
| 250 if destuser and destuser.sessions then | |
| 251 -- User online | |
| 252 if resource and destuser.sessions[resource] then | |
| 253 stanza.to:send(stanza); | |
| 254 else | |
| 255 --User is online, but specified resource isn't (or no resource specified) | |
| 256 local best_session; | |
| 257 for resource, session in pairs(destuser.sessions) do | |
| 258 if not best_session then best_session = session; | |
| 259 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 260 best_session = session; | |
| 261 end | |
| 262 end | |
| 263 if not best_session then | |
| 264 offlinemessage.new(node, host, stanza); | |
| 265 else | |
| 266 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 267 resource = best_session.resource; | |
| 268 end | |
| 269 end | |
| 270 if destuser.sessions[resource] == session then | |
| 271 log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
| 272 else | |
| 273 print("...sending...", tostring(stanza)); | |
| 274 --destuser.sessions[resource].conn.write(tostring(data)); | |
| 275 print(" to conn ", destuser.sessions[resource].conn); | |
| 276 destuser.sessions[resource].conn.write(tostring(stanza)); | |
| 277 print("...sent") | |
| 278 end | |
| 279 elseif stanza.name == "message" then | |
| 280 print(" ...will be stored offline"); | |
| 281 offlinemessage.new(node, host, stanza); | |
| 282 elseif stanza.name == "iq" then | |
| 283 print(" ...is an iq"); | |
| 284 stanza.from:send(st.reply(stanza) | |
| 285 :tag("error", { type = "cancel" }) | |
| 286 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
| 287 end | |
| 288 end | |
| 289 | |
| 290 -- Broadcast a presence stanza to all of a user's contacts | |
| 291 function handle_stanza_presence_broadcast(session, stanza) | |
| 292 if session.roster then | |
| 293 local initial_presence = not session.last_presence; | |
| 294 session.last_presence = stanza; | |
| 295 | |
| 296 -- Broadcast presence and probes | |
| 297 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
| 298 | |
| 299 for child in stanza:childtags() do | |
| 300 broadcast:add_child(child); | |
| 301 end | |
| 302 for contact_jid in pairs(session.roster) do | |
| 303 broadcast.attr.to = contact_jid; | |
| 304 send_to(contact_jid, broadcast); | |
| 305 if initial_presence then | |
| 306 local node, host = jid.split(contact_jid); | |
| 307 if hosts[host] and hosts[host].type == "local" then | |
| 308 local contact = hosts[host].sessions[node] | |
| 309 if contact then | |
| 310 local pres = st.presence { to = session.full_jid }; | |
| 311 for resource, contact_session in pairs(contact.sessions) do | |
| 312 if contact_session.last_presence then | |
| 313 pres.tags = contact_session.last_presence.tags; | |
| 314 pres.attr.from = contact_session.full_jid; | |
| 315 send(pres); | |
| 316 end | |
| 317 end | |
| 318 end | |
| 319 --FIXME: Do we send unavailable if they are offline? | |
| 320 else | |
| 321 probe.attr.to = contact; | |
| 322 send_to(contact, probe); | |
| 323 end | |
| 324 end | |
| 325 end | |
| 326 | |
| 327 -- Probe for our contacts' presence | |
| 328 end | |
| 329 end | |
| 330 | |
| 331 -- Broadcast presence probes to all of a user's contacts | |
| 332 function handle_stanza_presence_probe_broadcast(session, stanza) | |
| 333 end | |
| 334 | |
| 335 -- | |
| 336 function handle_stanza_to_server(stanza) | |
| 337 end | |
| 338 | |
| 339 function handle_stanza_iq_no_to(session, stanza) | |
| 340 end | |
| 341 ]] |
