Fri, 24 Oct 2008 07:27:36 +0100
s2s works! \o/ \o/
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 | local user_exists = require "core.usermanager".user_exists; |
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14 | |
145 | 15 | local s2s_verify_dialback = require "core.s2smanager".verify_dialback; |
146 | 16 | local s2s_make_authenticated = require "core.s2smanager".make_authenticated; |
145 | 17 | local format = string.format; |
18 | local tostring = tostring; | |
19 | ||
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20 | local jid_split = require "util.jid".split; |
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21 | local print = print; |
30 | 22 | |
23 | function core_process_stanza(origin, stanza) | |
66 | 24 | log("debug", "Received: "..tostring(stanza)) |
73 | 25 | -- TODO verify validity of stanza (as well as JID validity) |
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26 | if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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27 | if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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28 | error("Invalid IQ"); |
148 | 29 | elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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30 | error("Invalid IQ"); |
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31 | end |
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32 | end |
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33 | |
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34 | if origin.type == "c2s" and not origin.full_jid |
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35 | and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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36 | and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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37 | error("Client MUST bind resource after auth"); |
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38 | end |
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39 | |
30 | 40 | local to = stanza.attr.to; |
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41 | -- TODO also, stazas should be returned to their original state before the function ends |
145 | 42 | if origin.type == "c2s" then |
43 | stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
44 | end | |
30 | 45 | |
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46 | if not to then |
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47 | core_handle_stanza(origin, stanza); |
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48 | elseif hosts[to] and hosts[to].type == "local" then |
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49 | core_handle_stanza(origin, stanza); |
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50 | elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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51 | core_handle_stanza(origin, stanza); |
148 | 52 | elseif origin.type == "c2s" or origin.type == "s2sin" then |
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53 | core_route_stanza(origin, stanza); |
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54 | end |
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55 | end |
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56 | |
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57 | -- This function handles stanzas which are not routed any further, |
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58 | -- that is, they are handled by this server |
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59 | function core_handle_stanza(origin, stanza) |
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60 | -- Handlers |
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61 | if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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62 | local session = origin; |
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63 | |
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64 | if stanza.name == "presence" and origin.roster then |
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65 | if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then |
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66 | for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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67 | local subscription = origin.roster[jid].subscription; |
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68 | if subscription == "both" or subscription == "from" then |
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69 | stanza.attr.to = jid; |
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70 | core_route_stanza(origin, stanza); |
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71 | end |
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72 | end |
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73 | --[[local node, host = jid_split(stanza.attr.from); |
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74 | for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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75 | if res.full_jid then |
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76 | res = user.sessions[k]; |
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77 | break; |
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78 | end |
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79 | end]] |
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80 | if not origin.presence then -- presence probes on initial presence |
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81 | local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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82 | for jid in pairs(origin.roster) do |
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83 | local subscription = origin.roster[jid].subscription; |
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84 | if subscription == "both" or subscription == "to" then |
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85 | probe.attr.to = jid; |
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86 | core_route_stanza(origin, probe); |
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87 | end |
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88 | end |
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89 | end |
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90 | origin.presence = stanza; |
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91 | stanza.attr.to = nil; -- reset it |
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92 | else |
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93 | -- TODO error, bad type |
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94 | end |
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95 | else |
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96 | log("debug", "Routing stanza to local"); |
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97 | handle_stanza(session, stanza); |
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98 | end |
148 | 99 | elseif origin.type == "s2sin_unauthed" or origin.type == "s2sin" then |
147 | 100 | if stanza.attr.xmlns == "jabber:server:dialback" then |
101 | if stanza.name == "verify" then | |
102 | -- We are being asked to verify the key, to ensure it was generated by us | |
103 | log("debug", "verifying dialback key..."); | |
104 | local attr = stanza.attr; | |
105 | print(tostring(attr.to), tostring(attr.from)) | |
106 | print(tostring(origin.to_host), tostring(origin.from_host)) | |
107 | -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34 | |
108 | --if attr.from ~= origin.to_host then error("invalid-from"); end | |
109 | local type = "invalid"; | |
110 | if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then | |
111 | type = "valid" | |
112 | end | |
113 | 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 | 114 | elseif stanza.name == "result" and origin.type == "s2sin_unauthed" then |
115 | -- he wants to be identified through dialback | |
147 | 116 | -- We need to check the key with the Authoritative server |
117 | local attr = stanza.attr; | |
118 | origin.from_host = attr.from; | |
119 | origin.to_host = attr.to; | |
120 | origin.dialback_key = stanza[1]; | |
121 | log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]); | |
122 | 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])); | |
123 | hosts[attr.from].dialback_verifying = origin; | |
145 | 124 | end |
125 | end | |
147 | 126 | elseif origin.type == "s2sout_unauthed" or origin.type == "s2sout" then |
127 | if stanza.attr.xmlns == "jabber:server:dialback" then | |
128 | if stanza.name == "result" then | |
129 | if stanza.attr.type == "valid" then | |
130 | s2s_make_authenticated(origin); | |
131 | else | |
132 | -- FIXME | |
133 | error("dialback failed!"); | |
134 | end | |
135 | elseif stanza.name == "verify" and origin.dialback_verifying then | |
136 | local valid; | |
137 | local attr = stanza.attr; | |
138 | if attr.type == "valid" then | |
139 | s2s_make_authenticated(origin.dialback_verifying); | |
140 | valid = "valid"; | |
141 | else | |
142 | -- Warn the original connection that is was not verified successfully | |
143 | log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed"); | |
144 | valid = "invalid"; | |
145 | end | |
146 | 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 | 147 | end |
148 | end | |
145 | 149 | else |
150 | log("warn", "Unhandled origin: %s", origin.type); | |
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151 | end |
30 | 152 | end |
153 | ||
127 | 154 | -- TODO: Does this function belong here? |
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155 | function is_authorized_to_see_presence(origin, username, host) |
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156 | local roster = datamanager.load(username, host, "roster") or {}; |
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157 | local item = roster[origin.username.."@"..origin.host]; |
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158 | return item and (item.subscription == "both" or item.subscription == "from"); |
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159 | end |
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160 | |
30 | 161 | function core_route_stanza(origin, stanza) |
162 | -- Hooks | |
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163 | --- ...later |
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164 | |
30 | 165 | -- Deliver |
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166 | local to = stanza.attr.to; |
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167 | local node, host, resource = jid_split(to); |
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168 | |
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169 | if stanza.name == "presence" and stanza.attr.type == "probe" then resource = nil; end |
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170 | |
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171 | local host_session = hosts[host] |
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172 | if host_session and host_session.type == "local" then |
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173 | -- Local host |
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174 | local user = host_session.sessions[node]; |
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175 | if user then |
72 | 176 | local res = user.sessions[resource]; |
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177 | if not res then |
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178 | -- if we get here, resource was not specified or was unavailable |
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179 | if stanza.name == "presence" then |
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180 | if stanza.attr.type == "probe" then |
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181 | if is_authorized_to_see_presence(origin, node, host) then |
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182 | for k in pairs(user.sessions) do -- return presence for all resources |
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183 | if user.sessions[k].presence then |
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184 | local pres = user.sessions[k].presence; |
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185 | pres.attr.to = origin.full_jid; |
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186 | pres.attr.from = user.sessions[k].full_jid; |
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187 | send(origin, pres); |
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188 | pres.attr.to = nil; |
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189 | pres.attr.from = nil; |
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190 | end |
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191 | end |
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192 | else |
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193 | send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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194 | end |
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195 | else |
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196 | for k in pairs(user.sessions) do -- presence broadcast to all user resources |
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197 | if user.sessions[k].full_jid then |
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198 | stanza.attr.to = user.sessions[k].full_jid; |
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199 | send(user.sessions[k], stanza); |
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200 | end |
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201 | end |
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202 | end |
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203 | elseif stanza.name == "message" then -- select a resource to recieve message |
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204 | for k in pairs(user.sessions) do |
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205 | if user.sessions[k].full_jid then |
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206 | res = user.sessions[k]; |
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207 | break; |
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208 | end |
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209 | end |
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210 | -- TODO find resource with greatest priority |
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211 | send(res, stanza); |
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212 | else |
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213 | -- TODO send IQ error |
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214 | end |
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215 | else |
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216 | -- User + resource is online... |
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217 | stanza.attr.to = res.full_jid; |
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218 | send(res, stanza); -- Yay \o/ |
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219 | end |
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220 | else |
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221 | -- user not online |
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222 | if user_exists(node, host) then |
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223 | if stanza.name == "presence" then |
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224 | 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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225 | -- TODO send last recieved unavailable presence |
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226 | else |
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227 | -- TODO send unavailable presence |
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228 | end |
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229 | elseif stanza.name == "message" then |
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230 | -- TODO send message error, or store offline messages |
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231 | elseif stanza.name == "iq" then |
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232 | -- TODO send IQ error |
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233 | end |
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234 | else -- user does not exist |
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235 | -- 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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236 | if stanza.name == "presence" then |
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237 | if stanza.attr.type == "probe" then |
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238 | send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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239 | end |
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240 | -- else ignore |
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241 | else |
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242 | send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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243 | end |
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244 | end |
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245 | end |
148 | 246 | elseif origin.type == "c2s" then |
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247 | -- Remote host |
148 | 248 | --stanza.attr.xmlns = "jabber:server"; |
249 | stanza.attr.xmlns = nil; | |
146 | 250 | log("debug", "sending s2s stanza: %s", tostring(stanza)); |
127 | 251 | send_s2s(origin.host, host, stanza); |
148 | 252 | else |
253 | log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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254 | end |
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255 | stanza.attr.to = to; -- reset |
30 | 256 | end |
257 | ||
258 | function handle_stanza_toremote(stanza) | |
259 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
260 | end |