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core/stanza_router.lua @ 150:d09b8a1ab046
Merging more s2s
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 24 Oct 2008 07:36:48 +0100 |
parent | 149:40e443eacbbd |
parent | 148:4c0dcd245d34 |
child | 153:8310bfddaba8 |
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 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 | |
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154 function is_authorized_to_see_presence(origin, username, host) |
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155 local roster = datamanager.load(username, host, "roster") or {}; |
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156 local item = roster[origin.username.."@"..origin.host]; |
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157 return item and (item.subscription == "both" or item.subscription == "from"); |
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158 end |
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159 |
30 | 160 function core_route_stanza(origin, stanza) |
161 -- Hooks | |
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162 --- ...later |
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163 |
30 | 164 -- Deliver |
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165 local to = stanza.attr.to; |
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166 local node, host, resource = jid_split(to); |
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167 |
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168 if stanza.name == "presence" and stanza.attr.type == "probe" then resource = nil; end |
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169 |
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170 local host_session = hosts[host] |
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171 if host_session and host_session.type == "local" then |
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172 -- Local host |
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173 local user = host_session.sessions[node]; |
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174 if user then |
72 | 175 local res = user.sessions[resource]; |
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176 if not res then |
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177 -- if we get here, resource was not specified or was unavailable |
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178 if stanza.name == "presence" then |
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179 if stanza.attr.type == "probe" then |
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180 if is_authorized_to_see_presence(origin, node, host) then |
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181 for k in pairs(user.sessions) do -- return presence for all resources |
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182 if user.sessions[k].presence then |
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183 local pres = user.sessions[k].presence; |
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184 pres.attr.to = origin.full_jid; |
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185 pres.attr.from = user.sessions[k].full_jid; |
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186 send(origin, pres); |
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187 pres.attr.to = nil; |
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188 pres.attr.from = nil; |
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189 end |
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190 end |
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191 else |
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192 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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193 end |
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194 else |
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195 for k in pairs(user.sessions) do -- presence broadcast to all user resources |
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196 if user.sessions[k].full_jid then |
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197 stanza.attr.to = user.sessions[k].full_jid; |
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198 send(user.sessions[k], stanza); |
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199 end |
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200 end |
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201 end |
113
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202 elseif stanza.name == "message" then -- select a resource to recieve message |
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203 for k in pairs(user.sessions) do |
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204 if user.sessions[k].full_jid then |
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205 res = user.sessions[k]; |
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206 break; |
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207 end |
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208 end |
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209 -- TODO find resource with greatest priority |
113
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210 send(res, stanza); |
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211 else |
113
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212 -- TODO send IQ error |
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213 end |
113
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214 else |
121
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215 -- User + resource is online... |
106
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216 stanza.attr.to = res.full_jid; |
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217 send(res, stanza); -- Yay \o/ |
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218 end |
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219 else |
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220 -- user not online |
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221 if user_exists(node, host) then |
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222 if stanza.name == "presence" then |
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223 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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224 -- TODO send last recieved unavailable presence |
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225 else |
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226 -- TODO send unavailable presence |
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227 end |
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228 elseif stanza.name == "message" then |
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229 -- TODO send message error, or store offline messages |
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230 elseif stanza.name == "iq" then |
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231 -- TODO send IQ error |
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232 end |
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233 else -- user does not exist |
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234 -- 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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235 if stanza.name == "presence" then |
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236 if stanza.attr.type == "probe" then |
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237 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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238 end |
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239 -- else ignore |
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240 else |
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241 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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242 end |
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243 end |
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244 end |
148 | 245 elseif origin.type == "c2s" then |
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246 -- Remote host |
148 | 247 --stanza.attr.xmlns = "jabber:server"; |
248 stanza.attr.xmlns = nil; | |
146 | 249 log("debug", "sending s2s stanza: %s", tostring(stanza)); |
127 | 250 send_s2s(origin.host, host, stanza); |
148 | 251 else |
252 log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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253 end |
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254 stanza.attr.to = to; -- reset |
30 | 255 end |
256 | |
257 function handle_stanza_toremote(stanza) | |
258 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
259 end |