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core/stanza_router.lua @ 138:cb0dd442ca63
Making the best attempt out of a bad merge from waqas
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Thu, 23 Oct 2008 18:24:55 +0100 |
| parent | 137:9a05dfb35dd5 |
| parent | 127:93f3c6b94c75 |
| child | 139:8f17ba74823c |
| rev | line source |
|---|---|
|
138
cb0dd442ca63
Making the best attempt out of a bad merge from waqas
Matthew Wild <mwild1@gmail.com>
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|
1 <<<<<<< local |
| 135 | 2 |
| 3 -- The code in this file should be self-explanatory, though the logic is horrible | |
| 4 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense | |
| 5 -- the rules from the RFCs (mainly 3921) | |
| 6 | |
| 7 require "core.servermanager" | |
| 8 | |
| 9 local log = require "util.logger".init("stanzarouter") | |
| 10 | |
| 11 local st = require "util.stanza"; | |
| 12 local send = require "core.sessionmanager".send_to_session; | |
| 13 -- local send_s2s = require "core.s2smanager".send_to_host; | |
| 14 local user_exists = require "core.usermanager".user_exists; | |
| 15 | |
| 16 local jid_split = require "util.jid".split; | |
| 17 local print, debug = print, debug; | |
| 18 | |
| 19 function core_process_stanza(origin, stanza) | |
| 20 log("debug", "Received: "..tostring(stanza)) | |
| 21 -- TODO verify validity of stanza (as well as JID validity) | |
| 22 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then | |
| 23 if stanza.attr.type == "set" or stanza.attr.type == "get" then | |
| 24 error("Invalid IQ"); | |
| 25 elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then | |
| 26 error("Invalid IQ"); | |
| 27 end | |
| 28 end | |
| 29 | |
| 30 if origin.type == "c2s" and not origin.full_jid | |
| 31 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" | |
| 32 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then | |
| 33 error("Client MUST bind resource after auth"); | |
| 34 end | |
| 35 | |
| 36 local to = stanza.attr.to; | |
| 37 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
| 38 -- TODO also, stazas should be returned to their original state before the function ends | |
| 39 | |
| 40 -- TODO presence subscriptions | |
| 41 if not to then | |
| 42 core_handle_stanza(origin, stanza); | |
| 43 elseif hosts[to] and hosts[to].type == "local" then | |
| 44 core_handle_stanza(origin, stanza); | |
| 45 elseif stanza.name == "iq" and not select(3, jid_split(to)) then | |
| 46 core_handle_stanza(origin, stanza); | |
| 47 elseif origin.type == "c2s" then | |
| 48 core_route_stanza(origin, stanza); | |
| 49 end | |
| 50 end | |
| 51 | |
| 52 -- This function handles stanzas which are not routed any further, | |
| 53 -- that is, they are handled by this server | |
| 54 function core_handle_stanza(origin, stanza) | |
| 55 -- Handlers | |
| 56 if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
| 57 local session = origin; | |
| 58 | |
| 59 if stanza.name == "presence" and origin.roster then | |
| 60 if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then | |
| 61 for jid in pairs(origin.roster) do -- broadcast to all interested contacts | |
| 62 local subscription = origin.roster[jid].subscription; | |
| 63 if subscription == "both" or subscription == "from" then | |
| 64 stanza.attr.to = jid; | |
| 65 core_route_stanza(origin, stanza); | |
| 66 end | |
| 67 end | |
| 68 local node, host = jid_split(stanza.attr.from); | |
| 69 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources and from resources | |
| 70 if res ~= origin then | |
| 71 if res.full_jid then -- to resource. FIXME is this check correct? Maybe it should be res.presence | |
| 72 stanza.attr.to = res.full_jid; | |
| 73 core_route_stanza(origin, stanza); | |
| 74 end | |
| 75 if res.presence then -- from all resources for which we have presence | |
| 76 res.presence.attr.to = origin.full_jid; | |
| 77 core_route_stanza(res, res.presence); | |
| 78 res.presence.attr.to = nil; | |
| 79 end | |
| 80 end | |
| 81 end | |
| 82 if not origin.presence then -- presence probes on initial presence | |
| 83 local probe = st.presence({from = origin.full_jid, type = "probe"}); | |
| 84 for jid in pairs(origin.roster) do | |
| 85 local subscription = origin.roster[jid].subscription; | |
| 86 if subscription == "both" or subscription == "to" then | |
| 87 probe.attr.to = jid; | |
| 88 core_route_stanza(origin, probe); | |
| 89 end | |
| 90 end | |
| 137 | 91 -- TODO resend subscription requests |
| 135 | 92 end |
| 93 origin.presence = stanza; | |
| 94 stanza.attr.to = nil; -- reset it | |
| 95 else | |
| 96 -- TODO error, bad type | |
| 97 end | |
| 98 else | |
| 99 log("debug", "Routing stanza to local"); | |
| 100 handle_stanza(session, stanza); | |
| 101 end | |
| 102 end | |
| 103 end | |
| 104 | |
| 105 function is_authorized_to_see_presence(origin, username, host) | |
| 106 local roster = datamanager.load(username, host, "roster") or {}; | |
| 107 local item = roster[origin.username.."@"..origin.host]; | |
| 108 return item and (item.subscription == "both" or item.subscription == "from"); | |
| 109 end | |
| 110 | |
| 111 function core_route_stanza(origin, stanza) | |
| 112 -- Hooks | |
| 113 --- ...later | |
| 114 | |
| 115 -- Deliver | |
| 116 local to = stanza.attr.to; | |
| 117 local node, host, resource = jid_split(to); | |
| 118 | |
| 119 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end | |
| 120 | |
| 121 local host_session = hosts[host] | |
| 122 if host_session and host_session.type == "local" then | |
| 123 -- Local host | |
| 124 local user = host_session.sessions[node]; | |
| 125 if user then | |
| 126 local res = user.sessions[resource]; | |
| 127 if not res then | |
| 128 -- if we get here, resource was not specified or was unavailable | |
| 129 if stanza.name == "presence" then | |
| 130 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then | |
| 131 if stanza.attr.type == "probe" then | |
| 132 if is_authorized_to_see_presence(origin, node, host) then | |
| 133 for k in pairs(user.sessions) do -- return presence for all resources | |
| 134 if user.sessions[k].presence then | |
| 135 local pres = user.sessions[k].presence; | |
| 136 pres.attr.to = origin.full_jid; | |
| 137 pres.attr.from = user.sessions[k].full_jid; | |
| 138 send(origin, pres); | |
| 139 pres.attr.to = nil; | |
| 140 pres.attr.from = nil; | |
| 141 end | |
| 142 end | |
| 143 else | |
| 144 send(origin, st.presence({from=user.."@"..host, to=origin.username.."@"..origin.host, type="unsubscribed"})); | |
| 145 end | |
| 146 elseif stanza.attr.type == "subscribe" then | |
| 147 -- TODO | |
| 148 elseif stanza.attr.type == "unsubscribe" then | |
| 149 -- TODO | |
| 150 elseif stanza.attr.type == "subscribed" then | |
| 151 -- TODO | |
| 152 elseif stanza.attr.type == "unsubscribed" then | |
| 153 -- TODO | |
| 154 end -- discard any other type | |
| 155 else -- sender is available or unavailable | |
| 156 for k in pairs(user.sessions) do -- presence broadcast to all user resources | |
| 157 if user.sessions[k].full_jid then | |
| 158 stanza.attr.to = user.sessions[k].full_jid; | |
| 159 send(user.sessions[k], stanza); | |
| 160 end | |
| 161 end | |
| 162 end | |
| 163 elseif stanza.name == "message" then -- select a resource to recieve message | |
| 164 for k in pairs(user.sessions) do | |
| 165 if user.sessions[k].full_jid then | |
| 166 res = user.sessions[k]; | |
| 167 break; | |
| 168 end | |
| 169 end | |
| 170 -- TODO find resource with greatest priority | |
| 171 send(res, stanza); | |
| 172 else | |
| 173 -- TODO send IQ error | |
| 174 end | |
| 175 else | |
| 176 -- User + resource is online... | |
| 177 stanza.attr.to = res.full_jid; | |
| 178 send(res, stanza); -- Yay \o/ | |
| 179 end | |
| 180 else | |
| 181 -- user not online | |
| 182 if user_exists(node, host) then | |
| 183 if stanza.name == "presence" then | |
| 184 if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s? | |
| 185 -- TODO send last recieved unavailable presence | |
| 186 else | |
| 187 -- TODO send unavailable presence | |
| 188 end | |
| 189 elseif stanza.name == "message" then | |
| 190 -- TODO send message error, or store offline messages | |
| 191 elseif stanza.name == "iq" then | |
| 192 -- TODO send IQ error | |
| 193 end | |
| 194 else -- user does not exist | |
| 195 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses? | |
| 196 if stanza.name == "presence" then | |
| 197 if stanza.attr.type == "probe" then | |
| 198 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); | |
| 199 end | |
| 200 -- else ignore | |
| 201 else | |
| 202 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); | |
| 203 end | |
| 204 end | |
| 205 end | |
| 206 else | |
| 207 -- Remote host | |
| 208 if host_session then | |
| 209 -- Send to session | |
| 210 else | |
| 211 -- Need to establish the connection | |
| 212 end | |
| 213 end | |
| 214 stanza.attr.to = to; -- reset | |
| 215 end | |
| 216 | |
| 217 function handle_stanza_toremote(stanza) | |
| 218 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 219 end | |
|
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Making the best attempt out of a bad merge from waqas
Matthew Wild <mwild1@gmail.com>
diff
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220 ======= |
| 30 | 221 |
| 222 -- The code in this file should be self-explanatory, though the logic is horrible | |
| 223 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense | |
| 224 -- the rules from the RFCs (mainly 3921) | |
| 225 | |
| 226 require "core.servermanager" | |
| 227 | |
| 228 local log = require "util.logger".init("stanzarouter") | |
| 229 | |
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230 local st = require "util.stanza"; |
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231 local send = require "core.sessionmanager".send_to_session; |
| 122 | 232 -- local send_s2s = require "core.s2smanager".send_to_host; |
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233 local user_exists = require "core.usermanager".user_exists; |
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234 |
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235 local jid_split = require "util.jid".split; |
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236 local print = print; |
| 30 | 237 |
| 238 function core_process_stanza(origin, stanza) | |
| 66 | 239 log("debug", "Received: "..tostring(stanza)) |
| 73 | 240 -- TODO verify validity of stanza (as well as JID validity) |
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241 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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242 if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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243 error("Invalid IQ"); |
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244 elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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245 error("Invalid IQ"); |
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246 end |
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247 end |
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248 |
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249 if origin.type == "c2s" and not origin.full_jid |
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250 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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251 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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252 error("Client MUST bind resource after auth"); |
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253 end |
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254 |
| 30 | 255 local to = stanza.attr.to; |
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256 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) |
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257 -- TODO also, stazas should be returned to their original state before the function ends |
| 30 | 258 |
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259 -- TODO presence subscriptions |
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260 if not to then |
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261 core_handle_stanza(origin, stanza); |
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262 elseif hosts[to] and hosts[to].type == "local" then |
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263 core_handle_stanza(origin, stanza); |
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264 elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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265 core_handle_stanza(origin, stanza); |
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266 elseif origin.type == "c2s" then |
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267 core_route_stanza(origin, stanza); |
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268 end |
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269 end |
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270 |
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271 -- This function handles stanzas which are not routed any further, |
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272 -- that is, they are handled by this server |
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273 function core_handle_stanza(origin, stanza) |
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274 -- Handlers |
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275 if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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276 local session = origin; |
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277 |
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278 if stanza.name == "presence" and origin.roster then |
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279 if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then |
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280 for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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281 local subscription = origin.roster[jid].subscription; |
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282 if subscription == "both" or subscription == "from" then |
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283 stanza.attr.to = jid; |
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284 core_route_stanza(origin, stanza); |
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285 end |
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286 end |
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287 --[[local node, host = jid_split(stanza.attr.from); |
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288 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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289 if res.full_jid then |
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290 res = user.sessions[k]; |
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291 break; |
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292 end |
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293 end]] |
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294 if not origin.presence then -- presence probes on initial presence |
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295 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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296 for jid in pairs(origin.roster) do |
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297 local subscription = origin.roster[jid].subscription; |
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298 if subscription == "both" or subscription == "to" then |
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299 probe.attr.to = jid; |
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300 core_route_stanza(origin, probe); |
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301 end |
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302 end |
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303 end |
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304 origin.presence = stanza; |
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305 stanza.attr.to = nil; -- reset it |
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306 else |
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307 -- TODO error, bad type |
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308 end |
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309 else |
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310 log("debug", "Routing stanza to local"); |
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311 handle_stanza(session, stanza); |
|
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312 end |
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313 end |
| 30 | 314 end |
| 315 | |
| 127 | 316 -- TODO: Does this function belong here? |
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317 function is_authorized_to_see_presence(origin, username, host) |
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318 local roster = datamanager.load(username, host, "roster") or {}; |
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319 local item = roster[origin.username.."@"..origin.host]; |
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320 return item and (item.subscription == "both" or item.subscription == "from"); |
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321 end |
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322 |
| 30 | 323 function core_route_stanza(origin, stanza) |
| 324 -- Hooks | |
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325 --- ...later |
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326 |
| 30 | 327 -- Deliver |
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328 local to = stanza.attr.to; |
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329 local node, host, resource = jid_split(to); |
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330 |
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331 if stanza.name == "presence" and stanza.attr.type == "probe" then resource = nil; end |
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332 |
|
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333 local host_session = hosts[host] |
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334 if host_session and host_session.type == "local" then |
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335 -- Local host |
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336 local user = host_session.sessions[node]; |
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337 if user then |
| 72 | 338 local res = user.sessions[resource]; |
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339 if not res then |
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340 -- if we get here, resource was not specified or was unavailable |
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341 if stanza.name == "presence" then |
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342 if stanza.attr.type == "probe" then |
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343 if is_authorized_to_see_presence(origin, node, host) then |
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344 for k in pairs(user.sessions) do -- return presence for all resources |
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345 if user.sessions[k].presence then |
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346 local pres = user.sessions[k].presence; |
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347 pres.attr.to = origin.full_jid; |
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348 pres.attr.from = user.sessions[k].full_jid; |
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349 send(origin, pres); |
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350 pres.attr.to = nil; |
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351 pres.attr.from = nil; |
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352 end |
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353 end |
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354 else |
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355 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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356 end |
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357 else |
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358 for k in pairs(user.sessions) do -- presence broadcast to all user resources |
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359 if user.sessions[k].full_jid then |
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360 stanza.attr.to = user.sessions[k].full_jid; |
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361 send(user.sessions[k], stanza); |
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362 end |
|
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363 end |
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364 end |
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365 elseif stanza.name == "message" then -- select a resource to recieve message |
|
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366 for k in pairs(user.sessions) do |
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367 if user.sessions[k].full_jid then |
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368 res = user.sessions[k]; |
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369 break; |
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370 end |
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371 end |
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372 -- TODO find resource with greatest priority |
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373 send(res, stanza); |
|
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374 else |
|
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375 -- TODO send IQ error |
|
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376 end |
|
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377 else |
|
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378 -- User + resource is online... |
|
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379 stanza.attr.to = res.full_jid; |
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380 send(res, stanza); -- Yay \o/ |
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381 end |
|
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|
382 else |
|
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383 -- user not online |
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384 if user_exists(node, host) then |
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385 if stanza.name == "presence" then |
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386 if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s? |
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387 -- TODO send last recieved unavailable presence |
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388 else |
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389 -- TODO send unavailable presence |
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390 end |
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391 elseif stanza.name == "message" then |
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392 -- TODO send message error, or store offline messages |
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393 elseif stanza.name == "iq" then |
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394 -- TODO send IQ error |
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395 end |
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396 else -- user does not exist |
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397 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses? |
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398 if stanza.name == "presence" then |
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399 if stanza.attr.type == "probe" then |
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400 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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401 end |
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402 -- else ignore |
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403 else |
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404 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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405 end |
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406 end |
|
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407 end |
|
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|
408 else |
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|
409 -- Remote host |
| 127 | 410 send_s2s(origin.host, host, stanza); |
|
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411 end |
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412 stanza.attr.to = to; -- reset |
| 30 | 413 end |
| 414 | |
| 415 function handle_stanza_toremote(stanza) | |
| 416 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 417 end | |
|
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|
418 >>>>>>> other |
