Mercurial > lxmppd-hg-xmllex / file comparison
comparison: core/stanza_router.lua
core/stanza_router.lua
- changeset 30
- bcf539295f2d
- child 31
- aaccbf07849b
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| 29:b847875801e5 | 30:bcf539295f2d |
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| 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 | |
| 10 require "util.jid" | |
| 11 local jid_split = jid.split; | |
| 12 | |
| 13 function core_process_stanza(origin, stanza) | |
| 14 local to = stanza.attr.to; | |
| 15 | |
| 16 if not to or (hosts[to] and hosts[to].type == "local") then | |
| 17 core_handle_stanza(origin, stanza); | |
| 18 elseif origin.type == "c2s" then | |
| 19 core_route_stanza(origin, stanza); | |
| 20 end | |
| 21 | |
| 22 end | |
| 23 | |
| 24 function core_handle_stanza(origin, stanza) | |
| 25 -- Handlers | |
| 26 if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
| 27 local session = origin; | |
| 28 stanza.attr.from = session.full_jid; | |
| 29 | |
| 30 log("debug", "Routing stanza"); | |
| 31 -- Stanza has no to attribute | |
| 32 --local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
| 33 --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 | |
| 34 | |
| 35 -- Stanza is to this server, or a user on this server | |
| 36 log("debug", "Routing stanza to local"); | |
| 37 print(type(origin), type(stanza)); | |
| 38 handle_stanza(session, stanza); | |
| 39 end | |
| 40 end | |
| 41 | |
| 42 function core_route_stanza(origin, stanza) | |
| 43 -- Hooks | |
| 44 -- Deliver | |
| 45 end | |
| 46 | |
| 47 function handle_stanza_nodest(stanza) | |
| 48 if stanza.name == "iq" then | |
| 49 handle_stanza_iq_no_to(session, stanza); | |
| 50 elseif stanza.name == "presence" then | |
| 51 -- Broadcast to this user's contacts | |
| 52 handle_stanza_presence_broadcast(session, stanza); | |
| 53 -- also, if it is initial presence, send out presence probes | |
| 54 if not session.last_presence then | |
| 55 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 56 end | |
| 57 session.last_presence = stanza; | |
| 58 elseif stanza.name == "message" then | |
| 59 -- Treat as if message was sent to bare JID of the sender | |
| 60 handle_stanza_to_local_user(stanza); | |
| 61 end | |
| 62 end | |
| 63 | |
| 64 function handle_stanza_tolocal(stanza) | |
| 65 local node, host, resource = jid.split(stanza.attr.to); | |
| 66 if host and hosts[host] and hosts[host].type == "local" then | |
| 67 -- Is a local host, handle internally | |
| 68 if node then | |
| 69 -- Is a local user, send to their session | |
| 70 log("debug", "Routing stanza to %s@%s", node, host); | |
| 71 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 72 handle_stanza_to_local_user(stanza); | |
| 73 else | |
| 74 -- Is sent to this server, let's handle it... | |
| 75 log("debug", "Routing stanza to %s", host); | |
| 76 handle_stanza_to_server(stanza, session); | |
| 77 end | |
| 78 end | |
| 79 end | |
| 80 | |
| 81 function handle_stanza_toremote(stanza) | |
| 82 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 83 end | |
| 84 | |
| 85 | |
| 86 --[[ | |
| 87 local function route_c2s_stanza(session, stanza) | |
| 88 stanza.attr.from = session.full_jid; | |
| 89 if not stanza.attr.to and session.username then | |
| 90 -- Has no 'to' attribute, handle internally | |
| 91 if stanza.name == "iq" then | |
| 92 handle_stanza_iq_no_to(session, stanza); | |
| 93 elseif stanza.name == "presence" then | |
| 94 -- Broadcast to this user's contacts | |
| 95 handle_stanza_presence_broadcast(session, stanza); | |
| 96 -- also, if it is initial presence, send out presence probes | |
| 97 if not session.last_presence then | |
| 98 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 99 end | |
| 100 session.last_presence = stanza; | |
| 101 elseif stanza.name == "message" then | |
| 102 -- Treat as if message was sent to bare JID of the sender | |
| 103 handle_stanza_to_local_user(stanza); | |
| 104 end | |
| 105 end | |
| 106 local node, host, resource = jid.split(stanza.attr.to); | |
| 107 if host and hosts[host] and hosts[host].type == "local" then | |
| 108 -- Is a local host, handle internally | |
| 109 if node then | |
| 110 -- Is a local user, send to their session | |
| 111 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 112 handle_stanza_to_local_user(stanza); | |
| 113 else | |
| 114 -- Is sent to this server, let's handle it... | |
| 115 handle_stanza_to_server(stanza, session); | |
| 116 end | |
| 117 else | |
| 118 -- Is not for us or a local user, route accordingly | |
| 119 route_s2s_stanza(stanza); | |
| 120 end | |
| 121 end | |
| 122 | |
| 123 function handle_stanza_no_to(session, stanza) | |
| 124 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
| 125 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
| 126 if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
| 127 if iq_handlers[xmlns] then | |
| 128 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
| 129 end | |
| 130 -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
| 131 log("warn", "Unhandled namespace: "..xmlns); | |
| 132 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
| 133 return; -- All done! | |
| 134 end | |
| 135 end | |
| 136 | |
| 137 function handle_stanza_to_local_user(stanza) | |
| 138 if stanza.name == "message" then | |
| 139 handle_stanza_message_to_local_user(stanza); | |
| 140 elseif stanza.name == "presence" then | |
| 141 handle_stanza_presence_to_local_user(stanza); | |
| 142 elseif stanza.name == "iq" then | |
| 143 handle_stanza_iq_to_local_user(stanza); | |
| 144 end | |
| 145 end | |
| 146 | |
| 147 function handle_stanza_message_to_local_user(stanza) | |
| 148 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 149 local destuser = hosts[host].sessions[node]; | |
| 150 if destuser then | |
| 151 if resource and destuser[resource] then | |
| 152 destuser[resource]:send(stanza); | |
| 153 else | |
| 154 -- Bare JID, or resource offline | |
| 155 local best_session; | |
| 156 for resource, session in pairs(destuser.sessions) do | |
| 157 if not best_session then best_session = session; | |
| 158 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 159 best_session = session; | |
| 160 end | |
| 161 end | |
| 162 if not best_session then | |
| 163 offlinemessage.new(node, host, stanza); | |
| 164 else | |
| 165 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 166 destuser[best_session]:send(stanza); | |
| 167 end | |
| 168 end | |
| 169 else | |
| 170 -- User is offline | |
| 171 offlinemessage.new(node, host, stanza); | |
| 172 end | |
| 173 end | |
| 174 | |
| 175 function handle_stanza_presence_to_local_user(stanza) | |
| 176 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 177 local destuser = hosts[host].sessions[node]; | |
| 178 if destuser then | |
| 179 if resource then | |
| 180 if destuser[resource] then | |
| 181 destuser[resource]:send(stanza); | |
| 182 else | |
| 183 return; | |
| 184 end | |
| 185 else | |
| 186 -- Broadcast to all user's resources | |
| 187 for resource, session in pairs(destuser.sessions) do | |
| 188 session:send(stanza); | |
| 189 end | |
| 190 end | |
| 191 end | |
| 192 end | |
| 193 | |
| 194 function handle_stanza_iq_to_local_user(stanza) | |
| 195 | |
| 196 end | |
| 197 | |
| 198 function foo() | |
| 199 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 200 local destuser = hosts[host].sessions[node]; | |
| 201 if destuser and destuser.sessions then | |
| 202 -- User online | |
| 203 if resource and destuser.sessions[resource] then | |
| 204 stanza.to:send(stanza); | |
| 205 else | |
| 206 --User is online, but specified resource isn't (or no resource specified) | |
| 207 local best_session; | |
| 208 for resource, session in pairs(destuser.sessions) do | |
| 209 if not best_session then best_session = session; | |
| 210 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 211 best_session = session; | |
| 212 end | |
| 213 end | |
| 214 if not best_session then | |
| 215 offlinemessage.new(node, host, stanza); | |
| 216 else | |
| 217 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 218 resource = best_session.resource; | |
| 219 end | |
| 220 end | |
| 221 if destuser.sessions[resource] == session then | |
| 222 log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
| 223 else | |
| 224 print("...sending...", tostring(stanza)); | |
| 225 --destuser.sessions[resource].conn.write(tostring(data)); | |
| 226 print(" to conn ", destuser.sessions[resource].conn); | |
| 227 destuser.sessions[resource].conn.write(tostring(stanza)); | |
| 228 print("...sent") | |
| 229 end | |
| 230 elseif stanza.name == "message" then | |
| 231 print(" ...will be stored offline"); | |
| 232 offlinemessage.new(node, host, stanza); | |
| 233 elseif stanza.name == "iq" then | |
| 234 print(" ...is an iq"); | |
| 235 stanza.from:send(st.reply(stanza) | |
| 236 :tag("error", { type = "cancel" }) | |
| 237 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
| 238 end | |
| 239 end | |
| 240 | |
| 241 -- Broadcast a presence stanza to all of a user's contacts | |
| 242 function handle_stanza_presence_broadcast(session, stanza) | |
| 243 if session.roster then | |
| 244 local initial_presence = not session.last_presence; | |
| 245 session.last_presence = stanza; | |
| 246 | |
| 247 -- Broadcast presence and probes | |
| 248 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
| 249 | |
| 250 for child in stanza:childtags() do | |
| 251 broadcast:add_child(child); | |
| 252 end | |
| 253 for contact_jid in pairs(session.roster) do | |
| 254 broadcast.attr.to = contact_jid; | |
| 255 send_to(contact_jid, broadcast); | |
| 256 if initial_presence then | |
| 257 local node, host = jid.split(contact_jid); | |
| 258 if hosts[host] and hosts[host].type == "local" then | |
| 259 local contact = hosts[host].sessions[node] | |
| 260 if contact then | |
| 261 local pres = st.presence { to = session.full_jid }; | |
| 262 for resource, contact_session in pairs(contact.sessions) do | |
| 263 if contact_session.last_presence then | |
| 264 pres.tags = contact_session.last_presence.tags; | |
| 265 pres.attr.from = contact_session.full_jid; | |
| 266 send(pres); | |
| 267 end | |
| 268 end | |
| 269 end | |
| 270 --FIXME: Do we send unavailable if they are offline? | |
| 271 else | |
| 272 probe.attr.to = contact; | |
| 273 send_to(contact, probe); | |
| 274 end | |
| 275 end | |
| 276 end | |
| 277 | |
| 278 -- Probe for our contacts' presence | |
| 279 end | |
| 280 end | |
| 281 | |
| 282 -- Broadcast presence probes to all of a user's contacts | |
| 283 function handle_stanza_presence_probe_broadcast(session, stanza) | |
| 284 end | |
| 285 | |
| 286 -- | |
| 287 function handle_stanza_to_server(stanza) | |
| 288 end | |
| 289 | |
| 290 function handle_stanza_iq_no_to(session, stanza) | |
| 291 end | |
| 292 ]] |
