Mercurial > lxmppd-hg-xmllex / file comparison
comparison: core/stanza_router.lua
core/stanza_router.lua
- changeset 140
- a0fc73d5f48c
- parent 139
- 8f17ba74823c
- child 141
- 37b3e9ed8918
equal
deleted
inserted
replaced
| 139:8f17ba74823c | 140:a0fc73d5f48c |
|---|---|
| 1 <<<<<<< local | |
| 1 | 2 |
| 2 -- The code in this file should be self-explanatory, though the logic is horrible | 3 -- 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 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense |
| 4 -- the rules from the RFCs (mainly 3921) | 5 -- the rules from the RFCs (mainly 3921) |
| 5 | 6 |
| 11 local send = require "core.sessionmanager".send_to_session; | 12 local send = require "core.sessionmanager".send_to_session; |
| 12 -- local send_s2s = require "core.s2smanager".send_to_host; | 13 -- local send_s2s = require "core.s2smanager".send_to_host; |
| 13 local user_exists = require "core.usermanager".user_exists; | 14 local user_exists = require "core.usermanager".user_exists; |
| 14 | 15 |
| 15 local jid_split = require "util.jid".split; | 16 local jid_split = require "util.jid".split; |
| 16 local print = print; | 17 local print, debug = print, debug; |
| 17 | 18 |
| 18 function core_process_stanza(origin, stanza) | 19 function core_process_stanza(origin, stanza) |
| 19 log("debug", "Received: "..tostring(stanza)) | 20 log("debug", "Received: "..tostring(stanza)) |
| 20 -- TODO verify validity of stanza (as well as JID validity) | 21 -- TODO verify validity of stanza (as well as JID validity) |
| 21 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then | 22 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
| 62 if subscription == "both" or subscription == "from" then | 63 if subscription == "both" or subscription == "from" then |
| 63 stanza.attr.to = jid; | 64 stanza.attr.to = jid; |
| 64 core_route_stanza(origin, stanza); | 65 core_route_stanza(origin, stanza); |
| 65 end | 66 end |
| 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 | |
| 91 -- TODO resend subscription requests | |
| 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 | |
| 220 ======= | |
| 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 | |
| 230 local st = require "util.stanza"; | |
| 231 local send = require "core.sessionmanager".send_to_session; | |
| 232 -- local send_s2s = require "core.s2smanager".send_to_host; | |
| 233 local user_exists = require "core.usermanager".user_exists; | |
| 234 | |
| 235 local jid_split = require "util.jid".split; | |
| 236 local print = print; | |
| 237 | |
| 238 function core_process_stanza(origin, stanza) | |
| 239 log("debug", "Received: "..tostring(stanza)) | |
| 240 -- TODO verify validity of stanza (as well as JID validity) | |
| 241 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then | |
| 242 if stanza.attr.type == "set" or stanza.attr.type == "get" then | |
| 243 error("Invalid IQ"); | |
| 244 elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then | |
| 245 error("Invalid IQ"); | |
| 246 end | |
| 247 end | |
| 248 | |
| 249 if origin.type == "c2s" and not origin.full_jid | |
| 250 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" | |
| 251 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then | |
| 252 error("Client MUST bind resource after auth"); | |
| 253 end | |
| 254 | |
| 255 local to = stanza.attr.to; | |
| 256 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
| 257 -- TODO also, stazas should be returned to their original state before the function ends | |
| 258 | |
| 259 -- TODO presence subscriptions | |
| 260 if not to then | |
| 261 core_handle_stanza(origin, stanza); | |
| 262 elseif hosts[to] and hosts[to].type == "local" then | |
| 263 core_handle_stanza(origin, stanza); | |
| 264 elseif stanza.name == "iq" and not select(3, jid_split(to)) then | |
| 265 core_handle_stanza(origin, stanza); | |
| 266 elseif origin.type == "c2s" then | |
| 267 core_route_stanza(origin, stanza); | |
| 268 end | |
| 269 end | |
| 270 | |
| 271 -- This function handles stanzas which are not routed any further, | |
| 272 -- that is, they are handled by this server | |
| 273 function core_handle_stanza(origin, stanza) | |
| 274 -- Handlers | |
| 275 if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
| 276 local session = origin; | |
| 277 | |
| 278 if stanza.name == "presence" and origin.roster then | |
| 279 if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then | |
| 280 for jid in pairs(origin.roster) do -- broadcast to all interested contacts | |
| 281 local subscription = origin.roster[jid].subscription; | |
| 282 if subscription == "both" or subscription == "from" then | |
| 283 stanza.attr.to = jid; | |
| 284 core_route_stanza(origin, stanza); | |
| 285 end | |
| 286 end | |
| 67 --[[local node, host = jid_split(stanza.attr.from); | 287 --[[local node, host = jid_split(stanza.attr.from); |
| 68 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources | 288 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
| 69 if res.full_jid then | 289 if res.full_jid then |
| 70 res = user.sessions[k]; | 290 res = user.sessions[k]; |
| 71 break; | 291 break; |
| 91 handle_stanza(session, stanza); | 311 handle_stanza(session, stanza); |
| 92 end | 312 end |
| 93 end | 313 end |
| 94 end | 314 end |
| 95 | 315 |
| 316 -- TODO: Does this function belong here? | |
| 96 function is_authorized_to_see_presence(origin, username, host) | 317 function is_authorized_to_see_presence(origin, username, host) |
| 97 local roster = datamanager.load(username, host, "roster") or {}; | 318 local roster = datamanager.load(username, host, "roster") or {}; |
| 98 local item = roster[origin.username.."@"..origin.host]; | 319 local item = roster[origin.username.."@"..origin.host]; |
| 99 return item and (item.subscription == "both" or item.subscription == "from"); | 320 return item and (item.subscription == "both" or item.subscription == "from"); |
| 100 end | 321 end |
| 184 end | 405 end |
| 185 end | 406 end |
| 186 end | 407 end |
| 187 else | 408 else |
| 188 -- Remote host | 409 -- Remote host |
| 189 if host_session then | 410 send_s2s(origin.host, host, stanza); |
| 190 -- Send to session | |
| 191 else | |
| 192 -- Need to establish the connection | |
| 193 end | |
| 194 end | 411 end |
| 195 stanza.attr.to = to; -- reset | 412 stanza.attr.to = to; -- reset |
| 196 end | 413 end |
| 197 | 414 |
| 198 function handle_stanza_toremote(stanza) | 415 function handle_stanza_toremote(stanza) |
| 199 log("error", "Stanza bound for remote host, but s2s is not implemented"); | 416 log("error", "Stanza bound for remote host, but s2s is not implemented"); |
| 200 end | 417 end |
| 418 >>>>>>> other |
