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core/stanza_router.lua @ 187:2e16e5077d8f
Was a bit hasty to remove send_s2s() from stanza_router. We still use it, and there is no problem with it.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 30 Oct 2008 21:19:26 +0000 |
parent | 186:bfa8a30ea488 |
child | 190:1e993b7deae7 |
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_s2s = require "core.s2smanager".send_to_host; |
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12 local user_exists = require "core.usermanager".user_exists; |
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13 |
171
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14 local rostermanager = require "core.rostermanager"; |
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15 local sessionmanager = require "core.sessionmanager"; |
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16 |
145 | 17 local s2s_verify_dialback = require "core.s2smanager".verify_dialback; |
146 | 18 local s2s_make_authenticated = require "core.s2smanager".make_authenticated; |
145 | 19 local format = string.format; |
20 local tostring = tostring; | |
21 | |
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22 local jid_split = require "util.jid".split; |
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23 local print = print; |
30 | 24 |
25 function core_process_stanza(origin, stanza) | |
66 | 26 log("debug", "Received: "..tostring(stanza)) |
73 | 27 -- TODO verify validity of stanza (as well as JID validity) |
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28 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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29 if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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30 error("Invalid IQ"); |
148 | 31 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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32 error("Invalid IQ"); |
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33 end |
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34 end |
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35 |
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36 if origin.type == "c2s" and not origin.full_jid |
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37 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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38 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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39 error("Client MUST bind resource after auth"); |
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40 end |
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41 |
30 | 42 local to = stanza.attr.to; |
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43 -- TODO also, stazas should be returned to their original state before the function ends |
145 | 44 if origin.type == "c2s" then |
45 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
46 end | |
30 | 47 |
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48 if not to then |
170 | 49 core_handle_stanza(origin, stanza); |
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50 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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51 local node, host = jid_split(stanza.attr.to); |
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52 local to_bare = node and (node.."@"..host) or host; -- bare JID |
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53 local from_node, from_host = jid_split(stanza.attr.from); |
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54 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID |
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55 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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56 elseif hosts[to] and hosts[to].type == "local" then |
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57 core_handle_stanza(origin, stanza); |
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58 elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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59 core_handle_stanza(origin, stanza); |
148 | 60 elseif origin.type == "c2s" or origin.type == "s2sin" then |
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61 core_route_stanza(origin, stanza); |
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62 end |
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63 end |
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64 |
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65 -- This function handles stanzas which are not routed any further, |
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66 -- that is, they are handled by this server |
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67 function core_handle_stanza(origin, stanza) |
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68 -- Handlers |
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69 if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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70 local session = origin; |
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71 |
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72 if stanza.name == "presence" and origin.roster then |
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73 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
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74 for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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75 local subscription = origin.roster[jid].subscription; |
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76 if subscription == "both" or subscription == "from" then |
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77 stanza.attr.to = jid; |
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78 core_route_stanza(origin, stanza); |
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79 end |
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80 end |
151 | 81 local node, host = jid_split(stanza.attr.from); |
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82 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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83 if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence |
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84 stanza.attr.to = res.full_jid; |
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85 core_route_stanza(origin, stanza); |
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86 end |
151 | 87 end |
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88 if not origin.presence then -- presence probes on initial presence -- FIXME does unavailable qualify as initial presence? |
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89 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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90 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to |
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91 local subscription = origin.roster[jid].subscription; |
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92 if subscription == "both" or subscription == "to" then |
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93 probe.attr.to = jid; |
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94 core_route_stanza(origin, probe); |
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95 end |
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96 end |
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97 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all resources |
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98 if res ~= origin and stanza.attr.type ~= "unavailable" and res.presence then -- FIXME does unavailable qualify as initial presence? |
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99 res.presence.attr.to = origin.full_jid; |
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100 core_route_stanza(res, res.presence); |
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101 res.presence.attr.to = nil; |
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102 end |
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103 end |
151 | 104 -- TODO resend subscription requests |
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105 end |
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106 origin.presence = stanza; |
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107 stanza.attr.to = nil; -- reset it |
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108 else |
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109 -- TODO error, bad type |
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110 end |
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111 else |
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112 log("debug", "Routing stanza to local"); |
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113 handle_stanza(session, stanza); |
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114 end |
148 | 115 elseif origin.type == "s2sin_unauthed" or origin.type == "s2sin" then |
147 | 116 if stanza.attr.xmlns == "jabber:server:dialback" then |
117 if stanza.name == "verify" then | |
118 -- We are being asked to verify the key, to ensure it was generated by us | |
119 log("debug", "verifying dialback key..."); | |
120 local attr = stanza.attr; | |
121 print(tostring(attr.to), tostring(attr.from)) | |
122 print(tostring(origin.to_host), tostring(origin.from_host)) | |
123 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34 | |
124 --if attr.from ~= origin.to_host then error("invalid-from"); end | |
168
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125 local type; |
147 | 126 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then |
127 type = "valid" | |
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128 else |
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129 type = "invalid" |
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130 log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to); |
147 | 131 end |
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132 origin.sends2s(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1])); |
148 | 133 elseif stanza.name == "result" and origin.type == "s2sin_unauthed" then |
134 -- he wants to be identified through dialback | |
147 | 135 -- We need to check the key with the Authoritative server |
136 local attr = stanza.attr; | |
137 origin.from_host = attr.from; | |
138 origin.to_host = attr.to; | |
139 origin.dialback_key = stanza[1]; | |
140 log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]); | |
141 send_s2s(attr.to, attr.from, format("<db:verify from='%s' to='%s' id='%s'>%s</db:verify>", attr.to, attr.from, origin.streamid, stanza[1])); | |
142 hosts[attr.from].dialback_verifying = origin; | |
145 | 143 end |
144 end | |
147 | 145 elseif origin.type == "s2sout_unauthed" or origin.type == "s2sout" then |
146 if stanza.attr.xmlns == "jabber:server:dialback" then | |
147 if stanza.name == "result" then | |
148 if stanza.attr.type == "valid" then | |
149 s2s_make_authenticated(origin); | |
150 else | |
151 -- FIXME | |
152 error("dialback failed!"); | |
153 end | |
154 elseif stanza.name == "verify" and origin.dialback_verifying then | |
155 local valid; | |
156 local attr = stanza.attr; | |
157 if attr.type == "valid" then | |
158 s2s_make_authenticated(origin.dialback_verifying); | |
159 valid = "valid"; | |
160 else | |
161 -- Warn the original connection that is was not verified successfully | |
162 log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed"); | |
163 valid = "invalid"; | |
164 end | |
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165 origin.dialback_verifying.sends2s(format("<db:result from='%s' to='%s' id='%s' type='%s'>%s</db:result>", attr.from, attr.to, attr.id, valid, origin.dialback_verifying.dialback_key)); |
146 | 166 end |
167 end | |
145 | 168 else |
169 log("warn", "Unhandled origin: %s", origin.type); | |
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170 end |
30 | 171 end |
172 | |
175
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173 function send_presence_of_available_resources(user, host, jid, recipient_session) |
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174 local h = hosts[host]; |
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175 local count = 0; |
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176 if h and h.type == "local" then |
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177 local u = h.sessions[user]; |
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178 if u then |
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179 for k, session in pairs(u.sessions) do |
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180 local pres = session.presence; |
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181 if pres then |
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182 pres.attr.to = jid; |
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183 pres.attr.from = session.full_jid; |
186
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184 recipient_session.send(pres); |
175
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185 pres.attr.to = nil; |
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186 pres.attr.from = nil; |
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187 count = count + 1; |
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188 end |
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189 end |
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190 end |
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191 end |
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192 return count; |
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193 end |
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194 |
177
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195 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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196 local node, host = jid_split(from_bare); |
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197 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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198 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
176
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199 if stanza.attr.type == "subscribe" then |
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200 log("debug", "outbound subscribe from "..from_bare.." for "..to_bare); |
176
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201 -- 1. route stanza |
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202 -- 2. roster push (subscription = none, ask = subscribe) |
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203 if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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204 rostermanager.roster_push(node, host, to_bare); |
176
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205 end -- else file error |
177
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206 core_route_stanza(origin, stanza); |
176
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207 elseif stanza.attr.type == "unsubscribe" then |
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208 log("debug", "outbound unsubscribe from "..from_bare.." for "..to_bare); |
176
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209 -- 1. route stanza |
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210 -- 2. roster push (subscription = none or from) |
177
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211 if rostermanager.unsubscribe(node, host, to_bare) then |
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212 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
176
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213 end -- else file error |
177
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214 core_route_stanza(origin, stanza); |
176
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215 elseif stanza.attr.type == "subscribed" then |
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216 log("debug", "outbound subscribed from "..from_bare.." for "..to_bare); |
176
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217 -- 1. route stanza |
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218 -- 2. roster_push () |
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219 -- 3. send_presence_of_available_resources |
177
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220 if rostermanager.subscribed(node, host, to_bare) then |
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221 rostermanager.roster_push(node, host, to_bare); |
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222 core_route_stanza(origin, stanza); |
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223 send_presence_of_available_resources(node, host, to_bare, origin); |
176
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224 end |
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225 elseif stanza.attr.type == "unsubscribed" then |
177
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226 log("debug", "outbound unsubscribed from "..from_bare.." for "..to_bare); |
176
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227 -- 1. route stanza |
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228 -- 2. roster push (subscription = none or to) |
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229 if rostermanager.unsubscribed(node, host, to_bare) then |
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230 rostermanager.roster_push(node, host, to_bare); |
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231 core_route_stanza(origin, stanza); |
176
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232 end |
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233 end |
177
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234 stanza.attr.from, stanza.attr.to = st_from, st_to; |
176
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235 end |
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236 |
175
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237 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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238 local node, host = jid_split(to_bare); |
177
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239 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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240 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
175
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241 if stanza.attr.type == "probe" then |
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242 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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243 if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then |
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244 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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245 end |
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246 else |
177
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247 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
175
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248 end |
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249 elseif stanza.attr.type == "subscribe" then |
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250 log("debug", "inbound subscribe from "..from_bare.." for "..to_bare); |
175
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251 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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252 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
175
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253 else |
177
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254 if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
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255 if rostermanager.set_contact_pending_in(node, host, from_bare) then |
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256 sessionmanager.send_to_available_resources(node, host, stanza); |
176
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257 end -- TODO else return error, unable to save |
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258 end |
175
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259 end |
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260 elseif stanza.attr.type == "unsubscribe" then |
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261 log("debug", "inbound unsubscribe from "..from_bare.." for "..to_bare); |
175
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262 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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263 rostermanager.roster_push(node, host, from_bare); |
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264 end |
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265 elseif stanza.attr.type == "subscribed" then |
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266 log("debug", "inbound subscribed from "..from_bare.." for "..to_bare); |
175
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267 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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268 rostermanager.roster_push(node, host, from_bare); |
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269 end |
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270 elseif stanza.attr.type == "unsubscribed" then |
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271 log("debug", "inbound unsubscribed from "..from_bare.." for "..to_bare); |
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272 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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273 rostermanager.roster_push(node, host, from_bare); |
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274 end |
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275 end -- discard any other type |
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276 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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277 end |
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278 |
30 | 279 function core_route_stanza(origin, stanza) |
280 -- Hooks | |
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281 --- ...later |
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282 |
30 | 283 -- Deliver |
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284 local to = stanza.attr.to; |
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285 local node, host, resource = jid_split(to); |
170 | 286 local to_bare = node and (node.."@"..host) or host; -- bare JID |
287 local from = stanza.attr.from; | |
288 local from_node, from_host, from_resource = jid_split(from); | |
289 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID | |
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290 |
151 | 291 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end |
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292 |
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293 local host_session = hosts[host] |
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294 if host_session and host_session.type == "local" then |
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295 -- Local host |
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296 local user = host_session.sessions[node]; |
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297 if user then |
72 | 298 local res = user.sessions[resource]; |
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299 if not res then |
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300 -- if we get here, resource was not specified or was unavailable |
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301 if stanza.name == "presence" then |
151 | 302 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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303 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
151 | 304 else -- sender is available or unavailable |
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305 for k in pairs(user.sessions) do -- presence broadcast to all user resources. FIXME should this be just for available resources? Do we need to check subscription? |
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306 if user.sessions[k].full_jid then |
170 | 307 stanza.attr.to = user.sessions[k].full_jid; -- reset at the end of function |
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308 user.sessions[k].send(stanza); |
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309 end |
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310 end |
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311 end |
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312 elseif stanza.name == "message" then -- select a resource to recieve message |
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313 for k in pairs(user.sessions) do |
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314 if user.sessions[k].full_jid then |
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315 res = user.sessions[k]; |
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316 break; |
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317 end |
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318 end |
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319 -- TODO find resource with greatest priority |
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320 res.send(stanza); |
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321 else |
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322 -- TODO send IQ error |
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323 end |
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324 else |
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325 -- User + resource is online... |
170 | 326 stanza.attr.to = res.full_jid; -- reset at the end of function |
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327 res.send(stanza); -- Yay \o/ |
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328 end |
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329 else |
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330 -- user not online |
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331 if user_exists(node, host) then |
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332 if stanza.name == "presence" then |
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333 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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334 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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335 else |
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336 -- TODO send unavailable presence or unsubscribed |
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337 end |
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338 elseif stanza.name == "message" then |
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339 -- TODO send message error, or store offline messages |
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340 elseif stanza.name == "iq" then |
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341 -- TODO send IQ error |
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342 end |
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343 else -- user does not exist |
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344 -- 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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345 if stanza.name == "presence" then |
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346 if stanza.attr.type == "probe" then |
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347 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"})); |
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348 end |
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349 -- else ignore |
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350 else |
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351 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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352 end |
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353 end |
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354 end |
148 | 355 elseif origin.type == "c2s" then |
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356 -- Remote host |
170 | 357 local xmlns = stanza.attr.xmlns; |
148 | 358 --stanza.attr.xmlns = "jabber:server"; |
359 stanza.attr.xmlns = nil; | |
146 | 360 log("debug", "sending s2s stanza: %s", tostring(stanza)); |
170 | 361 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors |
362 stanza.attr.xmlns = xmlns; -- reset | |
148 | 363 else |
364 log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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365 end |
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366 stanza.attr.to = to; -- reset |
30 | 367 end |
368 | |
369 function handle_stanza_toremote(stanza) | |
370 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
371 end |