prosody
1e993b7deae7
core/stanza_router.lua

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core/stanza_router.lua @ 190:1e993b7deae7

General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
author Matthew Wild <mwild1@gmail.com>
date Sat, 01 Nov 2008 18:28:46 +0000
parent 187:2e16e5077d8f
child 191:e64c8a44060f
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1
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2 -- The code in this file should be self-explanatory, though the logic is horrible
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3 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense
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4 -- the rules from the RFCs (mainly 3921)
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5
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6 require "core.servermanager"
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8 local log = require "util.logger".init("stanzarouter")
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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
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17 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
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18 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
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19 local format = string.format;
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20 local tostring = tostring;
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21
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22 local jid_split = require "util.jid".split;
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23 local print = print;
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25 function core_process_stanza(origin, stanza)
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26 log("debug", "Received["..origin.type.."]: "..tostring(stanza))
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27 -- TODO verify validity of stanza (as well as JID validity)
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28 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then
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29 if stanza.attr.type == "set" or stanza.attr.type == "get" then
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30 error("Invalid IQ");
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31 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then
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32 error("Invalid IQ");
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33 end
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34 end
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36 if origin.type == "c2s" and not origin.full_jid
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37 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
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38 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
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39 error("Client MUST bind resource after auth");
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40 end
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41
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42 local to = stanza.attr.to;
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43 -- TODO also, stazas should be returned to their original state before the function ends
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44 if origin.type == "c2s" then
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45 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)
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46 end
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48 if not to then
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49 core_handle_stanza(origin, stanza);
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50 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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51 local node, host = jid_split(stanza.attr.to);
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52 local to_bare = node and (node.."@"..host) or host; -- bare JID
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53 local from_node, from_host = jid_split(stanza.attr.from);
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54 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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55 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare);
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56 elseif hosts[to] and hosts[to].type == "local" then
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57 core_handle_stanza(origin, stanza);
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58 elseif stanza.name == "iq" and not select(3, jid_split(to)) then
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59 core_handle_stanza(origin, stanza);
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60 elseif origin.type == "c2s" or origin.type == "s2sin" then
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61 core_route_stanza(origin, stanza);
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62 end
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63 end
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64
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65 -- This function handles stanzas which are not routed any further,
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66 -- that is, they are handled by this server
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67 function core_handle_stanza(origin, stanza)
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68 -- Handlers
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69 if origin.type == "c2s" or origin.type == "c2s_unauthed" then
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70 local session = origin;
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71
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72 if stanza.name == "presence" and origin.roster then
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73 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
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74 for jid in pairs(origin.roster) do -- broadcast to all interested contacts
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75 local subscription = origin.roster[jid].subscription;
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76 if subscription == "both" or subscription == "from" then
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77 stanza.attr.to = jid;
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78 core_route_stanza(origin, stanza);
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79 end
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80 end
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81 local node, host = jid_split(stanza.attr.from);
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82 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources
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83 if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence
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84 stanza.attr.to = res.full_jid;
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85 core_route_stanza(origin, stanza);
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86 end
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87 end
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88 if not origin.presence then -- presence probes on initial presence -- FIXME does unavailable qualify as initial presence?
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89 local probe = st.presence({from = origin.full_jid, type = "probe"});
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90 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to
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91 local subscription = origin.roster[jid].subscription;
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92 if subscription == "both" or subscription == "to" then
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93 probe.attr.to = jid;
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94 core_route_stanza(origin, probe);
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95 end
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96 end
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97 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all resources
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98 if res ~= origin and stanza.attr.type ~= "unavailable" and res.presence then -- FIXME does unavailable qualify as initial presence?
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99 res.presence.attr.to = origin.full_jid;
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100 core_route_stanza(res, res.presence);
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101 res.presence.attr.to = nil;
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102 end
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103 end
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104 -- TODO resend subscription requests
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105 end
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106 origin.presence = stanza;
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107 stanza.attr.to = nil; -- reset it
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108 else
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109 -- TODO error, bad type
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110 end
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111 else
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112 log("debug", "Routing stanza to local");
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113 handle_stanza(session, stanza);
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114 end
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115 elseif origin.type == "s2sin_unauthed" or origin.type == "s2sin" then
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116 if stanza.attr.xmlns == "jabber:server:dialback" then
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117 if stanza.name == "verify" then
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118 -- We are being asked to verify the key, to ensure it was generated by us
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119 log("debug", "verifying dialback key...");
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120 local attr = stanza.attr;
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121 print(tostring(attr.to), tostring(attr.from))
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122 print(tostring(origin.to_host), tostring(origin.from_host))
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123 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
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124 --if attr.from ~= origin.to_host then error("invalid-from"); end
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125 local type;
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126 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
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127 type = "valid"
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128 else
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129 type = "invalid"
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130 log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to);
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131 end
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132 origin.sends2s(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1]));
148
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parents: 147
diff changeset
133 elseif stanza.name == "result" and origin.type == "s2sin_unauthed" then
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diff changeset
134 -- he wants to be identified through dialback
147
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diff changeset
135 -- We need to check the key with the Authoritative server
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diff changeset
136 local attr = stanza.attr;
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diff changeset
137 origin.from_host = attr.from;
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138 origin.to_host = attr.to;
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diff changeset
139 origin.dialback_key = stanza[1];
190
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140 log("debug", "asking %s if key %s belongs to them", origin.from_host, origin.dialback_key);
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diff changeset
141 send_s2s(origin.to_host, origin.from_host, format("<db:verify from='%s' to='%s' id='%s'>%s</db:verify>", origin.to_host, origin.from_host, origin.streamid, origin.dialback_key));
1e993b7deae7 General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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diff changeset
142 hosts[origin.from_host].dialback_verifying = origin;
145
fbb3a4ff9cf1 dialback keys now verified
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diff changeset
143 end
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diff changeset
144 end
147
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diff changeset
145 elseif origin.type == "s2sout_unauthed" or origin.type == "s2sout" then
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diff changeset
146 if stanza.attr.xmlns == "jabber:server:dialback" then
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parents: 146
diff changeset
147 if stanza.name == "result" then
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diff changeset
148 if stanza.attr.type == "valid" then
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diff changeset
149 s2s_make_authenticated(origin);
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150 else
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diff changeset
151 -- FIXME
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diff changeset
152 error("dialback failed!");
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diff changeset
153 end
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diff changeset
154 elseif stanza.name == "verify" and origin.dialback_verifying then
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diff changeset
155 local valid;
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diff changeset
156 local attr = stanza.attr;
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diff changeset
157 if attr.type == "valid" then
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158 s2s_make_authenticated(origin.dialback_verifying);
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159 valid = "valid";
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160 else
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161 -- Warn the original connection that is was not verified successfully
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162 log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed");
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163 valid = "invalid";
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164 end
186
bfa8a30ea488 sends2s -> s2s_session.send(), s2s_session.send() -> s2s_session.sends2s()
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165 origin.dialback_verifying.sends2s(format("<db:result from='%s' to='%s' id='%s' type='%s'>%s</db:result>", attr.from, attr.to, attr.id, valid, origin.dialback_verifying.dialback_key));
146
3826ca244eb6 working outgoing s2s \o/
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166 end
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parents: 145
diff changeset
167 end
145
fbb3a4ff9cf1 dialback keys now verified
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diff changeset
168 else
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diff changeset
169 log("warn", "Unhandled origin: %s", origin.type);
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diff changeset
170 end
30
bcf539295f2d Huge commit to:
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171 end
bcf539295f2d Huge commit to:
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parents:
diff changeset
172
175
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173 function send_presence_of_available_resources(user, host, jid, recipient_session)
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174 local h = hosts[host];
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175 local count = 0;
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176 if h and h.type == "local" then
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177 local u = h.sessions[user];
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178 if u then
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179 for k, session in pairs(u.sessions) do
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180 local pres = session.presence;
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181 if pres then
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182 pres.attr.to = jid;
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183 pres.attr.from = session.full_jid;
186
bfa8a30ea488 sends2s -> s2s_session.send(), s2s_session.send() -> s2s_session.sends2s()
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184 recipient_session.send(pres);
175
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185 pres.attr.to = nil;
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186 pres.attr.from = nil;
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187 count = count + 1;
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188 end
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189 end
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190 end
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191 end
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diff changeset
192 return count;
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193 end
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194
177
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195 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare)
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196 local node, host = jid_split(from_bare);
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197 local st_from, st_to = stanza.attr.from, stanza.attr.to;
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198 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
176
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199 if stanza.attr.type == "subscribe" then
177
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200 log("debug", "outbound subscribe from "..from_bare.." for "..to_bare);
176
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201 -- 1. route stanza
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202 -- 2. roster push (subscription = none, ask = subscribe)
177
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diff changeset
203 if rostermanager.set_contact_pending_out(node, host, to_bare) then
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diff changeset
204 rostermanager.roster_push(node, host, to_bare);
176
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parents: 175
diff changeset
205 end -- else file error
177
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diff changeset
206 core_route_stanza(origin, stanza);
176
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207 elseif stanza.attr.type == "unsubscribe" then
177
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parents: 176
diff changeset
208 log("debug", "outbound unsubscribe from "..from_bare.." for "..to_bare);
176
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diff changeset
209 -- 1. route stanza
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210 -- 2. roster push (subscription = none or from)
177
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diff changeset
211 if rostermanager.unsubscribe(node, host, to_bare) then
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diff changeset
212 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
176
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diff changeset
213 end -- else file error
177
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diff changeset
214 core_route_stanza(origin, stanza);
176
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diff changeset
215 elseif stanza.attr.type == "subscribed" then
177
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parents: 176
diff changeset
216 log("debug", "outbound subscribed from "..from_bare.." for "..to_bare);
176
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parents: 175
diff changeset
217 -- 1. route stanza
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parents: 175
diff changeset
218 -- 2. roster_push ()
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parents: 175
diff changeset
219 -- 3. send_presence_of_available_resources
177
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diff changeset
220 if rostermanager.subscribed(node, host, to_bare) then
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diff changeset
221 rostermanager.roster_push(node, host, to_bare);
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parents: 176
diff changeset
222 core_route_stanza(origin, stanza);
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parents: 176
diff changeset
223 send_presence_of_available_resources(node, host, to_bare, origin);
176
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parents: 175
diff changeset
224 end
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parents: 175
diff changeset
225 elseif stanza.attr.type == "unsubscribed" then
177
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parents: 176
diff changeset
226 log("debug", "outbound unsubscribed from "..from_bare.." for "..to_bare);
176
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parents: 175
diff changeset
227 -- 1. route stanza
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parents: 175
diff changeset
228 -- 2. roster push (subscription = none or to)
177
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diff changeset
229 if rostermanager.unsubscribed(node, host, to_bare) then
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diff changeset
230 rostermanager.roster_push(node, host, to_bare);
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parents: 176
diff changeset
231 core_route_stanza(origin, stanza);
176
e5cd2a03891d Outbound presence subscription
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diff changeset
232 end
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parents: 175
diff changeset
233 end
177
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diff changeset
234 stanza.attr.from, stanza.attr.to = st_from, st_to;
176
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parents: 175
diff changeset
235 end
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parents: 175
diff changeset
236
175
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diff changeset
237 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare)
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parents: 174
diff changeset
238 local node, host = jid_split(to_bare);
177
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diff changeset
239 local st_from, st_to = stanza.attr.from, stanza.attr.to;
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diff changeset
240 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
175
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parents: 174
diff changeset
241 if stanza.attr.type == "probe" then
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parents: 174
diff changeset
242 if rostermanager.is_contact_subscribed(node, host, from_bare) then
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parents: 174
diff changeset
243 if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then
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parents: 174
diff changeset
244 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
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diff changeset
245 end
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parents: 174
diff changeset
246 else
177
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parents: 176
diff changeset
247 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"}));
175
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diff changeset
248 end
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parents: 174
diff changeset
249 elseif stanza.attr.type == "subscribe" then
177
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parents: 176
diff changeset
250 log("debug", "inbound subscribe from "..from_bare.." for "..to_bare);
175
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parents: 174
diff changeset
251 if rostermanager.is_contact_subscribed(node, host, from_bare) then
177
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parents: 176
diff changeset
252 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed
175
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diff changeset
253 else
177
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diff changeset
254 if not rostermanager.is_contact_pending_in(node, host, from_bare) then
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parents: 176
diff changeset
255 if rostermanager.set_contact_pending_in(node, host, from_bare) then
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parents: 176
diff changeset
256 sessionmanager.send_to_available_resources(node, host, stanza);
176
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parents: 175
diff changeset
257 end -- TODO else return error, unable to save
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parents: 175
diff changeset
258 end
175
5f71d290bb44 Routing code reorganization
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diff changeset
259 end
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parents: 174
diff changeset
260 elseif stanza.attr.type == "unsubscribe" then
177
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parents: 176
diff changeset
261 log("debug", "inbound unsubscribe from "..from_bare.." for "..to_bare);
175
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parents: 174
diff changeset
262 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
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parents: 174
diff changeset
263 rostermanager.roster_push(node, host, from_bare);
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parents: 174
diff changeset
264 end
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parents: 174
diff changeset
265 elseif stanza.attr.type == "subscribed" then
177
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parents: 176
diff changeset
266 log("debug", "inbound subscribed from "..from_bare.." for "..to_bare);
175
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parents: 174
diff changeset
267 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
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parents: 174
diff changeset
268 rostermanager.roster_push(node, host, from_bare);
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269 end
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270 elseif stanza.attr.type == "unsubscribed" then
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271 log("debug", "inbound unsubscribed from "..from_bare.." for "..to_bare);
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272 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
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273 rostermanager.roster_push(node, host, from_bare);
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274 end
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275 end -- discard any other type
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276 stanza.attr.from, stanza.attr.to = st_from, st_to;
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277 end
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278
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279 function core_route_stanza(origin, stanza)
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280 -- Hooks
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281 --- ...later
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282
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283 -- Deliver
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284 local to = stanza.attr.to;
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285 local node, host, resource = jid_split(to);
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286 local to_bare = node and (node.."@"..host) or host; -- bare JID
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287 local from = stanza.attr.from;
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288 local from_node, from_host, from_resource = jid_split(from);
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289 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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290
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291 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end
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292
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293 local host_session = hosts[host]
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294 if host_session and host_session.type == "local" then
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295 -- Local host
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296 local user = host_session.sessions[node];
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297 if user then
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298 local res = user.sessions[resource];
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299 if not res then
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300 -- if we get here, resource was not specified or was unavailable
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301 if stanza.name == "presence" then
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302 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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303 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare);
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304 else -- sender is available or unavailable
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305 for k in pairs(user.sessions) do -- presence broadcast to all user resources. FIXME should this be just for available resources? Do we need to check subscription?
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306 if user.sessions[k].full_jid then
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307 stanza.attr.to = user.sessions[k].full_jid; -- reset at the end of function
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308 user.sessions[k].send(stanza);
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309 end
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310 end
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311 end
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312 elseif stanza.name == "message" then -- select a resource to recieve message
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313 for k in pairs(user.sessions) do
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314 if user.sessions[k].full_jid then
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315 res = user.sessions[k];
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316 break;
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317 end
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318 end
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319 -- TODO find resource with greatest priority
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320 res.send(stanza);
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321 else
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322 -- TODO send IQ error
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323 end
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324 else
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325 -- User + resource is online...
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326 stanza.attr.to = res.full_jid; -- reset at the end of function
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327 res.send(stanza); -- Yay \o/
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328 end
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329 else
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330 -- user not online
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331 if user_exists(node, host) then
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332 if stanza.name == "presence" then
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333 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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334 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare);
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335 else
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336 -- TODO send unavailable presence or unsubscribed
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337 end
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338 elseif stanza.name == "message" then
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339 -- TODO send message error, or store offline messages
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340 elseif stanza.name == "iq" then
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341 -- TODO send IQ error
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342 end
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343 else -- user does not exist
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344 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
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345 if stanza.name == "presence" then
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346 if stanza.attr.type == "probe" then
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347 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
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348 end
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349 -- else ignore
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350 else
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351 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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352 end
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353 end
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354 end
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355 elseif origin.type == "c2s" then
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356 -- Remote host
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357 local xmlns = stanza.attr.xmlns;
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358 --stanza.attr.xmlns = "jabber:server";
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359 stanza.attr.xmlns = nil;
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360 log("debug", "sending s2s stanza: %s", tostring(stanza));
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361 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
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362 stanza.attr.xmlns = xmlns; -- reset
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363 else
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364 log("warn", "received stanza from unhandled connection type: %s", origin.type);
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365 end
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366 stanza.attr.to = to; -- reset
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367 end
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368
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369 function handle_stanza_toremote(stanza)
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370 log("error", "Stanza bound for remote host, but s2s is not implemented");
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371 end