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core/stanza_router.lua @ 176:e5cd2a03891d
Outbound presence subscription
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sat, 25 Oct 2008 21:16:08 +0500 |
parent | 175:5f71d290bb44 |
child | 177:606c433955e7 |
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 local send_s2s = require "core.s2smanager".send_to_host; |
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13 function send(session, stanza) |
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14 if session.type == "c2s" then |
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15 _send(session, stanza); |
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16 else |
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17 local xmlns = stanza.attr.xmlns; |
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18 --stanza.attr.xmlns = "jabber:server"; |
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19 stanza.attr.xmlns = nil; |
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20 log("debug", "sending s2s stanza: %s", tostring(stanza)); |
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21 send_s2s(session.host, host, stanza); -- TODO handle remote routing errors |
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22 stanza.attr.xmlns = xmlns; -- reset |
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23 end |
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24 end |
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25 local user_exists = require "core.usermanager".user_exists; |
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26 |
171
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27 local rostermanager = require "core.rostermanager"; |
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28 local sessionmanager = require "core.sessionmanager"; |
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29 |
145 | 30 local s2s_verify_dialback = require "core.s2smanager".verify_dialback; |
146 | 31 local s2s_make_authenticated = require "core.s2smanager".make_authenticated; |
145 | 32 local format = string.format; |
33 local tostring = tostring; | |
34 | |
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35 local jid_split = require "util.jid".split; |
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36 local print = print; |
30 | 37 |
38 function core_process_stanza(origin, stanza) | |
66 | 39 log("debug", "Received: "..tostring(stanza)) |
73 | 40 -- TODO verify validity of stanza (as well as JID validity) |
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41 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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42 if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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43 error("Invalid IQ"); |
148 | 44 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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45 error("Invalid IQ"); |
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46 end |
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47 end |
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48 |
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49 if origin.type == "c2s" and not origin.full_jid |
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50 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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51 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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52 error("Client MUST bind resource after auth"); |
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53 end |
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54 |
30 | 55 local to = stanza.attr.to; |
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56 -- TODO also, stazas should be returned to their original state before the function ends |
145 | 57 if origin.type == "c2s" then |
58 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
59 end | |
30 | 60 |
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61 if not to then |
170 | 62 core_handle_stanza(origin, stanza); |
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63 elseif hosts[to] and hosts[to].type == "local" then |
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64 core_handle_stanza(origin, stanza); |
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65 elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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66 core_handle_stanza(origin, stanza); |
148 | 67 elseif origin.type == "c2s" or origin.type == "s2sin" then |
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68 core_route_stanza(origin, stanza); |
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69 end |
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70 end |
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71 |
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72 -- This function handles stanzas which are not routed any further, |
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73 -- that is, they are handled by this server |
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74 function core_handle_stanza(origin, stanza) |
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75 -- Handlers |
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76 if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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77 local session = origin; |
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78 |
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79 if stanza.name == "presence" and origin.roster then |
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80 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
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81 for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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82 local subscription = origin.roster[jid].subscription; |
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83 if subscription == "both" or subscription == "from" then |
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84 stanza.attr.to = jid; |
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85 core_route_stanza(origin, stanza); |
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86 end |
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87 end |
151 | 88 local node, host = jid_split(stanza.attr.from); |
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89 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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90 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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91 stanza.attr.to = res.full_jid; |
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92 core_route_stanza(origin, stanza); |
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93 end |
151 | 94 end |
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95 if not origin.presence then -- presence probes on initial presence -- FIXME does unavailable qualify as initial presence? |
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96 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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97 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to |
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98 local subscription = origin.roster[jid].subscription; |
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99 if subscription == "both" or subscription == "to" then |
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100 probe.attr.to = jid; |
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101 core_route_stanza(origin, probe); |
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102 end |
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103 end |
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104 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all resources |
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105 if res ~= origin and stanza.attr.type ~= "unavailable" and res.presence then -- FIXME does unavailable qualify as initial presence? |
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106 res.presence.attr.to = origin.full_jid; |
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107 core_route_stanza(res, res.presence); |
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108 res.presence.attr.to = nil; |
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109 end |
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110 end |
151 | 111 -- TODO resend subscription requests |
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112 end |
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113 origin.presence = stanza; |
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114 stanza.attr.to = nil; -- reset it |
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115 else |
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116 -- TODO error, bad type |
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117 end |
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118 else |
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119 log("debug", "Routing stanza to local"); |
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120 handle_stanza(session, stanza); |
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121 end |
148 | 122 elseif origin.type == "s2sin_unauthed" or origin.type == "s2sin" then |
147 | 123 if stanza.attr.xmlns == "jabber:server:dialback" then |
124 if stanza.name == "verify" then | |
125 -- We are being asked to verify the key, to ensure it was generated by us | |
126 log("debug", "verifying dialback key..."); | |
127 local attr = stanza.attr; | |
128 print(tostring(attr.to), tostring(attr.from)) | |
129 print(tostring(origin.to_host), tostring(origin.from_host)) | |
130 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34 | |
131 --if attr.from ~= origin.to_host then error("invalid-from"); end | |
132 local type = "invalid"; | |
133 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then | |
134 type = "valid" | |
135 end | |
136 origin.send(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1])); | |
148 | 137 elseif stanza.name == "result" and origin.type == "s2sin_unauthed" then |
138 -- he wants to be identified through dialback | |
147 | 139 -- We need to check the key with the Authoritative server |
140 local attr = stanza.attr; | |
141 origin.from_host = attr.from; | |
142 origin.to_host = attr.to; | |
143 origin.dialback_key = stanza[1]; | |
144 log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]); | |
145 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])); | |
146 hosts[attr.from].dialback_verifying = origin; | |
145 | 147 end |
148 end | |
147 | 149 elseif origin.type == "s2sout_unauthed" or origin.type == "s2sout" then |
150 if stanza.attr.xmlns == "jabber:server:dialback" then | |
151 if stanza.name == "result" then | |
152 if stanza.attr.type == "valid" then | |
153 s2s_make_authenticated(origin); | |
154 else | |
155 -- FIXME | |
156 error("dialback failed!"); | |
157 end | |
158 elseif stanza.name == "verify" and origin.dialback_verifying then | |
159 local valid; | |
160 local attr = stanza.attr; | |
161 if attr.type == "valid" then | |
162 s2s_make_authenticated(origin.dialback_verifying); | |
163 valid = "valid"; | |
164 else | |
165 -- Warn the original connection that is was not verified successfully | |
166 log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed"); | |
167 valid = "invalid"; | |
168 end | |
169 origin.dialback_verifying.send(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 | 170 end |
171 end | |
145 | 172 else |
173 log("warn", "Unhandled origin: %s", origin.type); | |
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174 end |
30 | 175 end |
176 | |
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177 function send_presence_of_available_resources(user, host, jid, recipient_session) |
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178 local h = hosts[host]; |
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179 local count = 0; |
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180 if h and h.type == "local" then |
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181 local u = h.sessions[user]; |
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182 if u then |
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183 for k, session in pairs(u.sessions) do |
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184 local pres = session.presence; |
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185 if pres then |
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186 pres.attr.to = jid; |
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187 pres.attr.from = session.full_jid; |
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188 send(recipient_session, pres); |
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189 pres.attr.to = nil; |
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190 pres.attr.from = nil; |
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191 count = count + 1; |
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192 end |
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193 end |
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194 end |
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195 end |
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196 return count; |
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197 end |
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198 |
176
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199 function handle_outbound_presence_subscriptions(origin, stanza, from_bare, to_bare) |
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200 local node, host = jid_split(to_bare); |
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201 if stanza.attr.type == "subscribe" then |
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202 -- 1. route stanza |
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203 -- 2. roster push (subscription = none, ask = subscribe) |
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204 if rostermanager.set_contact_pending_out(node, host, from_bare) then |
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205 rostermanager.roster_push(node, host, from_bare); |
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206 end -- else file error |
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207 core_route_stanza(origin, st.presence({from=from_bare, to=to_bare, type="subscribe"})); |
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208 elseif stanza.attr.type == "unsubscribe" then |
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209 -- 1. route stanza |
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210 -- 2. roster push (subscription = none or from) |
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211 if rostermanager.unsubscribe(node, host, from_bare) then |
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212 rostermanager.roster_push(node, host, from_bare); -- FIXME do roster push when roster has in fact not changed? |
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213 end -- else file error |
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214 core_route_stanza(origin, st.presence({from=from_bare, to=to_bare, type="unsubscribe"})); |
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215 elseif stanza.attr.type == "subscribed" then |
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216 -- 1. route stanza |
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217 -- 2. roster_push () |
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218 -- 3. send_presence_of_available_resources |
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219 if rostermanager.subscribed(node, host, from_bare) then |
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220 rostermanager.roster_push(node, host, from_bare); |
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221 core_route_stanza(origin, st.presence({from=from_bare, to=to_bare, type="subscribed"})); |
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222 send_presence_of_available_resources(user, host, from_bare, origin); |
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223 end |
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224 elseif stanza.attr.type == "unsubscribed" then |
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225 -- 1. route stanza |
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226 -- 2. roster push (subscription = none or to) |
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227 if rostermanager.unsubscribed(node, host, from_bare) then |
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228 rostermanager.roster_push(node, host, from_bare); |
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229 core_route_stanza(origin, st.presence({from=from_bare, to=to_bare, type="unsubscribed"})); |
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230 end |
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231 end |
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232 end |
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233 |
175
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234 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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235 local node, host = jid_split(to_bare); |
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236 if stanza.attr.type == "probe" then |
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237 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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238 if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then |
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239 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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240 end |
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241 else |
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242 send(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
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243 end |
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244 elseif stanza.attr.type == "subscribe" then |
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245 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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246 send(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
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247 else |
176
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248 if not rostermanager.is_contact_pending(node, host, from_bare) then |
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249 if rostermanager.set_contact_pending(node, host, from_bare) then |
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250 sessionmanager.send_to_available_resources(node, host, st.presence({from=from_bare, type="subscribe"})); |
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251 end -- TODO else return error, unable to save |
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252 end |
175
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253 end |
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254 elseif stanza.attr.type == "unsubscribe" then |
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255 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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256 rostermanager.roster_push(node, host, from_bare); |
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257 end |
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258 elseif stanza.attr.type == "subscribed" then |
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259 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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260 rostermanager.roster_push(node, host, from_bare); |
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261 send_presence_of_available_resources(node, host, from_bare, origin); |
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262 end |
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263 elseif stanza.attr.type == "unsubscribed" then |
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264 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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265 rostermanager.roster_push(node, host, from_bare); |
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266 end |
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267 end -- discard any other type |
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268 end |
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269 |
30 | 270 function core_route_stanza(origin, stanza) |
271 -- Hooks | |
68
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272 --- ...later |
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273 |
30 | 274 -- Deliver |
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275 local to = stanza.attr.to; |
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276 local node, host, resource = jid_split(to); |
170 | 277 local to_bare = node and (node.."@"..host) or host; -- bare JID |
278 local from = stanza.attr.from; | |
279 local from_node, from_host, from_resource = jid_split(from); | |
280 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID | |
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281 |
151 | 282 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end |
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283 |
68
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284 local host_session = hosts[host] |
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285 if host_session and host_session.type == "local" then |
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286 -- Local host |
71
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287 local user = host_session.sessions[node]; |
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288 if user then |
72 | 289 local res = user.sessions[resource]; |
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290 if not res then |
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291 -- if we get here, resource was not specified or was unavailable |
106
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292 if stanza.name == "presence" then |
151 | 293 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
175
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294 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
151 | 295 else -- sender is available or unavailable |
175
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296 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? |
113
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297 if user.sessions[k].full_jid then |
170 | 298 stanza.attr.to = user.sessions[k].full_jid; -- reset at the end of function |
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299 send(user.sessions[k], stanza); |
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300 end |
106
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301 end |
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302 end |
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303 elseif stanza.name == "message" then -- select a resource to recieve message |
106
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304 for k in pairs(user.sessions) do |
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305 if user.sessions[k].full_jid then |
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306 res = user.sessions[k]; |
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307 break; |
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308 end |
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309 end |
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310 -- TODO find resource with greatest priority |
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311 send(res, stanza); |
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312 else |
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313 -- TODO send IQ error |
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314 end |
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315 else |
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316 -- User + resource is online... |
170 | 317 stanza.attr.to = res.full_jid; -- reset at the end of function |
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318 send(res, stanza); -- Yay \o/ |
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319 end |
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320 else |
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321 -- user not online |
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322 if user_exists(node, host) then |
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323 if stanza.name == "presence" then |
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324 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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325 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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326 else |
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327 -- TODO send unavailable presence or unsubscribed |
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328 end |
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329 elseif stanza.name == "message" then |
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330 -- TODO send message error, or store offline messages |
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331 elseif stanza.name == "iq" then |
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332 -- TODO send IQ error |
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333 end |
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334 else -- user does not exist |
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335 -- 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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336 if stanza.name == "presence" then |
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337 if stanza.attr.type == "probe" then |
170 | 338 send(origin, st.presence({from = to_bare, to = from_bare, type = "unsubscribed"})); |
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339 end |
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340 -- else ignore |
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341 else |
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342 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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343 end |
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344 end |
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345 end |
148 | 346 elseif origin.type == "c2s" then |
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347 -- Remote host |
170 | 348 local xmlns = stanza.attr.xmlns; |
148 | 349 --stanza.attr.xmlns = "jabber:server"; |
350 stanza.attr.xmlns = nil; | |
146 | 351 log("debug", "sending s2s stanza: %s", tostring(stanza)); |
170 | 352 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors |
353 stanza.attr.xmlns = xmlns; -- reset | |
148 | 354 else |
355 log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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356 end |
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357 stanza.attr.to = to; -- reset |
30 | 358 end |
359 | |
360 function handle_stanza_toremote(stanza) | |
361 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
362 end |