Sun, 02 Nov 2008 01:30:36 +0000
Fix for previous commit (again)
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 | |
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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; |
191 | 19 | |
20 | local modules_handle_stanza = require "core.modulemanager".handle_stanza; | |
21 | ||
145 | 22 | local format = string.format; |
23 | local tostring = tostring; | |
24 | ||
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25 | local jid_split = require "util.jid".split; |
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26 | local print = print; |
30 | 27 | |
28 | function core_process_stanza(origin, stanza) | |
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29 | log("debug", "Received["..origin.type.."]: "..tostring(stanza)) |
73 | 30 | -- TODO verify validity of stanza (as well as JID validity) |
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31 | if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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32 | if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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33 | error("Invalid IQ"); |
148 | 34 | elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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35 | error("Invalid IQ"); |
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36 | end |
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37 | end |
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38 | |
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39 | if origin.type == "c2s" and not origin.full_jid |
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40 | and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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41 | and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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42 | error("Client MUST bind resource after auth"); |
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43 | end |
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44 | |
30 | 45 | local to = stanza.attr.to; |
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46 | -- TODO also, stazas should be returned to their original state before the function ends |
145 | 47 | if origin.type == "c2s" then |
48 | stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
49 | end | |
30 | 50 | |
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51 | if not to then |
170 | 52 | core_handle_stanza(origin, stanza); |
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53 | elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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54 | local node, host = jid_split(stanza.attr.to); |
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55 | local to_bare = node and (node.."@"..host) or host; -- bare JID |
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56 | local from_node, from_host = jid_split(stanza.attr.from); |
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57 | local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID |
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58 | handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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59 | elseif hosts[to] and hosts[to].type == "local" then |
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60 | core_handle_stanza(origin, stanza); |
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61 | elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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62 | core_handle_stanza(origin, stanza); |
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63 | elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then |
191 | 64 | modules_handle_stanza(origin, stanza); |
148 | 65 | elseif origin.type == "c2s" or origin.type == "s2sin" then |
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66 | core_route_stanza(origin, stanza); |
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67 | end |
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68 | end |
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69 | |
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70 | -- This function handles stanzas which are not routed any further, |
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71 | -- that is, they are handled by this server |
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72 | function core_handle_stanza(origin, stanza) |
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73 | -- Handlers |
191 | 74 | if modules_handle_stanza(origin, stanza) then return; end |
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75 | if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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76 | local session = origin; |
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77 | |
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78 | if stanza.name == "presence" and origin.roster then |
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79 | if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
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80 | for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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81 | local subscription = origin.roster[jid].subscription; |
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82 | if subscription == "both" or subscription == "from" then |
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83 | stanza.attr.to = jid; |
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84 | core_route_stanza(origin, stanza); |
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85 | end |
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86 | end |
151 | 87 | local node, host = jid_split(stanza.attr.from); |
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88 | for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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89 | 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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90 | stanza.attr.to = res.full_jid; |
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91 | core_route_stanza(origin, stanza); |
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92 | end |
151 | 93 | end |
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94 | if not origin.presence then -- presence probes on initial presence -- FIXME does unavailable qualify as initial presence? |
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95 | local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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96 | for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to |
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97 | local subscription = origin.roster[jid].subscription; |
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98 | if subscription == "both" or subscription == "to" then |
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99 | probe.attr.to = jid; |
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100 | core_route_stanza(origin, probe); |
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101 | end |
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102 | end |
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103 | for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all resources |
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104 | if res ~= origin and stanza.attr.type ~= "unavailable" and res.presence then -- FIXME does unavailable qualify as initial presence? |
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105 | res.presence.attr.to = origin.full_jid; |
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106 | core_route_stanza(res, res.presence); |
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107 | res.presence.attr.to = nil; |
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108 | end |
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109 | end |
151 | 110 | -- TODO resend subscription requests |
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111 | end |
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112 | origin.presence = stanza; |
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113 | stanza.attr.to = nil; -- reset it |
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114 | else |
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115 | -- TODO error, bad type |
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116 | end |
146 | 117 | end |
145 | 118 | else |
119 | log("warn", "Unhandled origin: %s", origin.type); | |
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120 | end |
30 | 121 | end |
122 | ||
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123 | function send_presence_of_available_resources(user, host, jid, recipient_session) |
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124 | local h = hosts[host]; |
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125 | local count = 0; |
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126 | if h and h.type == "local" then |
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127 | local u = h.sessions[user]; |
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128 | if u then |
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129 | for k, session in pairs(u.sessions) do |
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130 | local pres = session.presence; |
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131 | if pres then |
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132 | pres.attr.to = jid; |
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133 | pres.attr.from = session.full_jid; |
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134 | recipient_session.send(pres); |
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135 | pres.attr.to = nil; |
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136 | pres.attr.from = nil; |
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137 | count = count + 1; |
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138 | end |
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139 | end |
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140 | end |
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141 | end |
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142 | return count; |
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143 | end |
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144 | |
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145 | function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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146 | local node, host = jid_split(from_bare); |
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147 | local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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148 | stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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149 | if stanza.attr.type == "subscribe" then |
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150 | log("debug", "outbound subscribe from "..from_bare.." for "..to_bare); |
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151 | -- 1. route stanza |
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152 | -- 2. roster push (subscription = none, ask = subscribe) |
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153 | if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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154 | rostermanager.roster_push(node, host, to_bare); |
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155 | end -- else file error |
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156 | core_route_stanza(origin, stanza); |
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157 | elseif stanza.attr.type == "unsubscribe" then |
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158 | log("debug", "outbound unsubscribe from "..from_bare.." for "..to_bare); |
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159 | -- 1. route stanza |
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160 | -- 2. roster push (subscription = none or from) |
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161 | if rostermanager.unsubscribe(node, host, to_bare) then |
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162 | rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
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163 | end -- else file error |
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164 | core_route_stanza(origin, stanza); |
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165 | elseif stanza.attr.type == "subscribed" then |
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166 | log("debug", "outbound subscribed from "..from_bare.." for "..to_bare); |
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167 | -- 1. route stanza |
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168 | -- 2. roster_push () |
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169 | -- 3. send_presence_of_available_resources |
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170 | if rostermanager.subscribed(node, host, to_bare) then |
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171 | rostermanager.roster_push(node, host, to_bare); |
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172 | core_route_stanza(origin, stanza); |
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173 | send_presence_of_available_resources(node, host, to_bare, origin); |
176
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174 | end |
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175 | elseif stanza.attr.type == "unsubscribed" then |
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176 | log("debug", "outbound unsubscribed from "..from_bare.." for "..to_bare); |
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177 | -- 1. route stanza |
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178 | -- 2. roster push (subscription = none or to) |
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179 | if rostermanager.unsubscribed(node, host, to_bare) then |
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180 | rostermanager.roster_push(node, host, to_bare); |
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181 | core_route_stanza(origin, stanza); |
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182 | end |
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183 | end |
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184 | stanza.attr.from, stanza.attr.to = st_from, st_to; |
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185 | end |
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186 | |
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187 | function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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188 | local node, host = jid_split(to_bare); |
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189 | local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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190 | stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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191 | if stanza.attr.type == "probe" then |
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192 | if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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193 | if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then |
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194 | -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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195 | end |
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196 | else |
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197 | core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
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198 | end |
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199 | elseif stanza.attr.type == "subscribe" then |
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200 | log("debug", "inbound subscribe from "..from_bare.." for "..to_bare); |
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201 | if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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202 | core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
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203 | else |
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204 | if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
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205 | if rostermanager.set_contact_pending_in(node, host, from_bare) then |
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206 | sessionmanager.send_to_available_resources(node, host, stanza); |
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207 | end -- TODO else return error, unable to save |
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208 | end |
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209 | end |
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210 | elseif stanza.attr.type == "unsubscribe" then |
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211 | log("debug", "inbound unsubscribe from "..from_bare.." for "..to_bare); |
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212 | if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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213 | rostermanager.roster_push(node, host, from_bare); |
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214 | end |
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215 | elseif stanza.attr.type == "subscribed" then |
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216 | log("debug", "inbound subscribed from "..from_bare.." for "..to_bare); |
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217 | if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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218 | rostermanager.roster_push(node, host, from_bare); |
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219 | end |
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220 | elseif stanza.attr.type == "unsubscribed" then |
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221 | log("debug", "inbound unsubscribed from "..from_bare.." for "..to_bare); |
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222 | if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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223 | rostermanager.roster_push(node, host, from_bare); |
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224 | end |
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225 | end -- discard any other type |
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226 | stanza.attr.from, stanza.attr.to = st_from, st_to; |
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227 | end |
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228 | |
30 | 229 | function core_route_stanza(origin, stanza) |
230 | -- Hooks | |
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231 | --- ...later |
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232 | |
30 | 233 | -- Deliver |
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234 | local to = stanza.attr.to; |
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235 | local node, host, resource = jid_split(to); |
170 | 236 | local to_bare = node and (node.."@"..host) or host; -- bare JID |
237 | local from = stanza.attr.from; | |
238 | local from_node, from_host, from_resource = jid_split(from); | |
239 | local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID | |
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240 | |
151 | 241 | if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end |
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242 | |
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243 | local host_session = hosts[host] |
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244 | if host_session and host_session.type == "local" then |
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245 | -- Local host |
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246 | local user = host_session.sessions[node]; |
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247 | if user then |
72 | 248 | local res = user.sessions[resource]; |
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249 | if not res then |
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250 | -- if we get here, resource was not specified or was unavailable |
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251 | if stanza.name == "presence" then |
151 | 252 | if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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253 | handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
151 | 254 | else -- sender is available or unavailable |
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255 | 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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256 | if user.sessions[k].full_jid then |
170 | 257 | stanza.attr.to = user.sessions[k].full_jid; -- reset at the end of function |
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258 | user.sessions[k].send(stanza); |
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259 | end |
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260 | end |
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261 | end |
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262 | elseif stanza.name == "message" then -- select a resource to recieve message |
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263 | for k in pairs(user.sessions) do |
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264 | if user.sessions[k].full_jid then |
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265 | res = user.sessions[k]; |
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266 | break; |
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267 | end |
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268 | end |
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269 | -- TODO find resource with greatest priority |
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270 | res.send(stanza); |
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271 | else |
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272 | -- TODO send IQ error |
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273 | end |
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274 | else |
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275 | -- User + resource is online... |
170 | 276 | stanza.attr.to = res.full_jid; -- reset at the end of function |
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277 | res.send(stanza); -- Yay \o/ |
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278 | end |
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279 | else |
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280 | -- user not online |
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281 | if user_exists(node, host) then |
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282 | if stanza.name == "presence" then |
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283 | if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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284 | handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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285 | else |
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286 | -- TODO send unavailable presence or unsubscribed |
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287 | end |
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288 | elseif stanza.name == "message" then |
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289 | -- TODO send message error, or store offline messages |
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290 | elseif stanza.name == "iq" then |
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291 | -- TODO send IQ error |
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292 | end |
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293 | else -- user does not exist |
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294 | -- 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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295 | if stanza.name == "presence" then |
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296 | if stanza.attr.type == "probe" then |
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297 | origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"})); |
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298 | end |
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299 | -- else ignore |
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300 | else |
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301 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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302 | end |
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303 | end |
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304 | end |
148 | 305 | elseif origin.type == "c2s" then |
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306 | -- Remote host |
170 | 307 | local xmlns = stanza.attr.xmlns; |
148 | 308 | --stanza.attr.xmlns = "jabber:server"; |
309 | stanza.attr.xmlns = nil; | |
146 | 310 | log("debug", "sending s2s stanza: %s", tostring(stanza)); |
170 | 311 | send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors |
312 | stanza.attr.xmlns = xmlns; -- reset | |
148 | 313 | else |
314 | log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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315 | end |
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316 | stanza.attr.to = to; -- reset |
30 | 317 | end |
318 | ||
319 | function handle_stanza_toremote(stanza) | |
320 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
321 | end |