prosody
a31715bf08eb
core/stanza_router.lua

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core/stanza_router.lua @ 340:a31715bf08eb

Extra checks before sending error replies to incoming stanzas
author Matthew Wild <mwild1@gmail.com>
date Wed, 19 Nov 2008 05:09:05 +0000
parent 321:31fe15ce6fac
child 358:ffb1a720f5ae
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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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7
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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 local offlinemanager = require "core.offlinemanager";
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17
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18 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
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19 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
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21 local modules_handle_stanza = require "core.modulemanager".handle_stanza;
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22 local component_handle_stanza = require "core.componentmanager".handle_stanza;
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24 local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
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25 local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
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26
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27 local format = string.format;
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28 local tostring = tostring;
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29 local t_concat = table.concat;
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30 local t_insert = table.insert;
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31 local tonumber = tonumber;
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32 local s_find = string.find;
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33
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34 local jid_split = require "util.jid".split;
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35 local print = print;
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37 function core_process_stanza(origin, stanza)
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38 (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:pretty_print()) --top_tag())
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39
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40 if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
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41 -- TODO verify validity of stanza (as well as JID validity)
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42 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then
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43 if stanza.attr.type == "set" or stanza.attr.type == "get" then
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44 error("Invalid IQ");
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45 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then
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46 error("Invalid IQ");
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47 end
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48 end
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50 if origin.type == "c2s" and not origin.full_jid
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51 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
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52 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
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53 error("Client MUST bind resource after auth");
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54 end
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55
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56 -- TODO also, stanzas should be returned to their original state before the function ends
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57 if origin.type == "c2s" then
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58 stanza.attr.from = origin.full_jid;
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59 end
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60 local to = stanza.attr.to;
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61 local node, host, resource = jid_split(to);
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62 local to_bare = node and (node.."@"..host) or host; -- bare JID
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63 local from = stanza.attr.from;
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64 local from_node, from_host, from_resource = jid_split(from);
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65 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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67 if origin.type == "s2sin" then
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68 if origin.from_host ~= from_host then -- remote server trying to impersonate some other server?
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69 log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from, origin.from_host);
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70 return; -- FIXME what should we do here? does this work with subdomains?
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71 end
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72 end
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73 --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
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74 log("warn", "stanza recieved for a non-local server");
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75 return; -- FIXME what should we do here?
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76 end]] -- FIXME
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78 -- FIXME do stanzas not of jabber:client get handled by components?
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79 if origin.type == "s2sin" or origin.type == "c2s" then
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80 if not to then
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81 core_handle_stanza(origin, stanza);
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82 elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
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83 core_handle_stanza(origin, stanza);
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84 elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
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85 modules_handle_stanza(origin, stanza);
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86 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
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87 component_handle_stanza(origin, stanza);
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88 elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
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89 component_handle_stanza(origin, stanza);
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90 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
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91 component_handle_stanza(origin, stanza);
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92 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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93 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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94 elseif origin.type ~= "c2s" and stanza.name == "iq" and not resource then -- directed at bare JID
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95 core_handle_stanza(origin, stanza);
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96 else
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97 core_route_stanza(origin, stanza);
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98 end
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99 else
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100 core_handle_stanza(origin, stanza);
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101 end
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102 end
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103
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104 -- This function handles stanzas which are not routed any further,
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105 -- that is, they are handled by this server
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106 function core_handle_stanza(origin, stanza)
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107 -- Handlers
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108 if modules_handle_stanza(origin, stanza) then return; end
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109 if origin.type == "c2s" or origin.type == "c2s_unauthed" then
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110 local session = origin;
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111
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112 if stanza.name == "presence" and origin.roster then
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113 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
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114 for jid in pairs(origin.roster) do -- broadcast to all interested contacts
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115 local subscription = origin.roster[jid].subscription;
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116 if subscription == "both" or subscription == "from" then
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117 stanza.attr.to = jid;
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118 core_route_stanza(origin, stanza);
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119 end
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120 end
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121 local node, host = jid_split(stanza.attr.from);
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122 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources
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123 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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124 stanza.attr.to = res.full_jid;
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125 core_route_stanza(origin, stanza);
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126 end
151
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parents: 143
diff changeset
127 end
199
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diff changeset
128 if stanza.attr.type == nil and not origin.presence then -- initial presence
113
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diff changeset
129 local probe = st.presence({from = origin.full_jid, type = "probe"});
152
6b8e2bd82ac5 Moved some code and removed unnecessary checks.
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parents: 151
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130 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to
113
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diff changeset
131 local subscription = origin.roster[jid].subscription;
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diff changeset
132 if subscription == "both" or subscription == "to" then
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diff changeset
133 probe.attr.to = jid;
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diff changeset
134 core_route_stanza(origin, probe);
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diff changeset
135 end
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diff changeset
136 end
199
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parents: 192
diff changeset
137 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources
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parents: 192
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138 if res ~= origin and res.presence then
152
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parents: 151
diff changeset
139 res.presence.attr.to = origin.full_jid;
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parents: 151
diff changeset
140 core_route_stanza(res, res.presence);
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parents: 151
diff changeset
141 res.presence.attr.to = nil;
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parents: 151
diff changeset
142 end
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parents: 151
diff changeset
143 end
199
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parents: 192
diff changeset
144 if origin.roster.pending then -- resend incoming subscription requests
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parents: 192
diff changeset
145 for jid in pairs(origin.roster.pending) do
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parents: 192
diff changeset
146 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
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parents: 192
diff changeset
147 end
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parents: 192
diff changeset
148 end
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parents: 192
diff changeset
149 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
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parents: 192
diff changeset
150 for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests
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parents: 192
diff changeset
151 if item.ask then
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parents: 192
diff changeset
152 request.attr.to = jid;
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parents: 192
diff changeset
153 core_route_stanza(origin, request);
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parents: 192
diff changeset
154 end
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parents: 192
diff changeset
155 end
249
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parents: 237
diff changeset
156 for _, msg in ipairs(offlinemanager.load(node, host) or {}) do
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parents: 237
diff changeset
157 origin.send(msg); -- FIXME do we need to modify to/from in any way?
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parents: 237
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158 end
1fc47cf5d144 Added basic offline message support
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parents: 237
diff changeset
159 offlinemanager.deleteAll(node, host);
113
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parents: 106
diff changeset
160 end
199
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parents: 192
diff changeset
161 origin.priority = 0;
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parents: 192
diff changeset
162 if stanza.attr.type == "unavailable" then
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parents: 192
diff changeset
163 origin.presence = nil;
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parents: 192
diff changeset
164 else
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parents: 192
diff changeset
165 origin.presence = stanza;
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parents: 192
diff changeset
166 local priority = stanza:child_with_name("priority");
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parents: 192
diff changeset
167 if priority and #priority > 0 then
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parents: 192
diff changeset
168 priority = t_concat(priority);
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parents: 192
diff changeset
169 if s_find(priority, "^[+-]?[0-9]+$") then
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parents: 192
diff changeset
170 priority = tonumber(priority);
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parents: 192
diff changeset
171 if priority < -128 then priority = -128 end
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parents: 192
diff changeset
172 if priority > 127 then priority = 127 end
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parents: 192
diff changeset
173 origin.priority = priority;
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parents: 192
diff changeset
174 end
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parents: 192
diff changeset
175 end
eccf66b42bd7 Added resource priority handling, etc
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parents: 192
diff changeset
176 end
113
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diff changeset
177 stanza.attr.to = nil; -- reset it
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diff changeset
178 else
250
9f66ede8deeb Added error replies for unhandled stanzas
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parents: 249
diff changeset
179 log("warn", "Unhandled c2s presence: %s", tostring(stanza));
340
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parents: 321
diff changeset
180 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" then
264
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parents: 262
diff changeset
181 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
a296b61baad8 Only reply with errors if the stanza is not an error or a result (don't know how much bandwidth this just cost me :) )
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parents: 262
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182 end
113
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diff changeset
183 end
250
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parents: 249
diff changeset
184 else
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parents: 249
diff changeset
185 log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
340
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parents: 321
diff changeset
186 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
264
a296b61baad8 Only reply with errors if the stanza is not an error or a result (don't know how much bandwidth this just cost me :) )
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parents: 262
diff changeset
187 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
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188 end
212
9d6da9ed9063 Internal component support
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189 end -- TODO handle other stanzas
145
fbb3a4ff9cf1 dialback keys now verified
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parents: 144
diff changeset
190 else
250
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parents: 249
diff changeset
191 log("warn", "Unhandled origin: %s", origin.type);
340
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parents: 321
diff changeset
192 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
264
a296b61baad8 Only reply with errors if the stanza is not an error or a result (don't know how much bandwidth this just cost me :) )
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parents: 262
diff changeset
193 -- s2s stanzas can get here
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parents: 262
diff changeset
194 (origin.sends2s or origin.send)(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
a296b61baad8 Only reply with errors if the stanza is not an error or a result (don't know how much bandwidth this just cost me :) )
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parents: 262
diff changeset
195 end
71
fbb4ef1da82e Added: Local stanza routing
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196 end
30
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parents:
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197 end
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parents:
diff changeset
198
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parents:
diff changeset
199 function core_route_stanza(origin, stanza)
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200 -- Hooks
68
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201 --- ...later
207
90c387884234 A little whitespace fix
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parents: 200
diff changeset
202
30
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203 -- Deliver
113
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diff changeset
204 local to = stanza.attr.to;
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205 local node, host, resource = jid_split(to);
170
e7bff9cfbb65 Minor fixes, comments
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diff changeset
206 local to_bare = node and (node.."@"..host) or host; -- bare JID
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207 local from = stanza.attr.from;
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diff changeset
208 local from_node, from_host, from_resource = jid_split(from);
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diff changeset
209 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
113
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diff changeset
210
151
096c7b9374fc Presence fixes (again)
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parents: 143
diff changeset
211 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end
113
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parents: 106
diff changeset
212
68
ceb7a55676a4 Beginnings of real stanza routing
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diff changeset
213 local host_session = hosts[host]
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diff changeset
214 if host_session and host_session.type == "local" then
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parents: 66
diff changeset
215 -- Local host
71
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parents: 68
diff changeset
216 local user = host_session.sessions[node];
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parents: 68
diff changeset
217 if user then
72
e78db62beebc Code cleanup
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parents: 71
diff changeset
218 local res = user.sessions[resource];
71
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diff changeset
219 if not res then
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diff changeset
220 -- if we get here, resource was not specified or was unavailable
106
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
221 if stanza.name == "presence" then
151
096c7b9374fc Presence fixes (again)
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parents: 143
diff changeset
222 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
321
31fe15ce6fac Moved presence subscription code from stanza_router to presencemanager
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parents: 274
diff changeset
223 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
151
096c7b9374fc Presence fixes (again)
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parents: 143
diff changeset
224 else -- sender is available or unavailable
200
5e8b3cce798f Priority based message routing, etc
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parents: 199
diff changeset
225 for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
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parents: 199
diff changeset
226 if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
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parents: 199
diff changeset
227 stanza.attr.to = session.full_jid; -- reset at the end of function
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parents: 199
diff changeset
228 session.send(stanza);
113
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diff changeset
229 end
106
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
230 end
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
231 end
113
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diff changeset
232 elseif stanza.name == "message" then -- select a resource to recieve message
200
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parents: 199
diff changeset
233 local priority = 0;
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parents: 199
diff changeset
234 local recipients = {};
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diff changeset
235 for _, session in pairs(user.sessions) do -- find resource with greatest priority
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parents: 199
diff changeset
236 local p = session.priority;
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parents: 199
diff changeset
237 if p > priority then
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parents: 199
diff changeset
238 priority = p;
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parents: 199
diff changeset
239 recipients = {session};
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parents: 199
diff changeset
240 elseif p == priority then
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parents: 199
diff changeset
241 t_insert(recipients, session);
106
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
242 end
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
243 end
249
1fc47cf5d144 Added basic offline message support
Waqas Hussain <waqas20@gmail.com>
parents: 237
diff changeset
244 local count = 0;
237
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Waqas Hussain <waqas20@gmail.com>
parents: 234
diff changeset
245 for _, session in pairs(recipients) do
200
5e8b3cce798f Priority based message routing, etc
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parents: 199
diff changeset
246 session.send(stanza);
249
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parents: 237
diff changeset
247 count = count + 1;
1fc47cf5d144 Added basic offline message support
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parents: 237
diff changeset
248 end
1fc47cf5d144 Added basic offline message support
Waqas Hussain <waqas20@gmail.com>
parents: 237
diff changeset
249 if count == 0 then
1fc47cf5d144 Added basic offline message support
Waqas Hussain <waqas20@gmail.com>
parents: 237
diff changeset
250 offlinemanager.store(node, host, stanza);
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parents: 237
diff changeset
251 -- TODO deal with storage errors
200
5e8b3cce798f Priority based message routing, etc
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parents: 199
diff changeset
252 end
106
f2a3d204a76a Added: presence broadcast
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parents: 105
diff changeset
253 else
113
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diff changeset
254 -- TODO send IQ error
71
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diff changeset
255 end
113
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parents: 106
diff changeset
256 else
121
74e5919e4737 Added a comment, removed all the old code
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parents: 119
diff changeset
257 -- User + resource is online...
170
e7bff9cfbb65 Minor fixes, comments
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parents: 160
diff changeset
258 stanza.attr.to = res.full_jid; -- reset at the end of function
186
bfa8a30ea488 sends2s -> s2s_session.send(), s2s_session.send() -> s2s_session.sends2s()
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parents: 178
diff changeset
259 res.send(stanza); -- Yay \o/
106
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parents: 105
diff changeset
260 end
71
fbb4ef1da82e Added: Local stanza routing
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parents: 68
diff changeset
261 else
113
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parents: 106
diff changeset
262 -- user not online
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parents: 106
diff changeset
263 if user_exists(node, host) then
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parents: 106
diff changeset
264 if stanza.name == "presence" then
175
5f71d290bb44 Routing code reorganization
Waqas Hussain <waqas20@gmail.com>
parents: 174
diff changeset
265 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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266 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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267 else
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268 -- TODO send unavailable presence or unsubscribed
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269 end
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270 elseif stanza.name == "message" then
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271 if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
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272 offlinemanager.store(node, host, stanza);
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273 -- FIXME don't store messages with only chat state notifications
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274 end
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275 -- TODO allow configuration of offline storage
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276 -- TODO send error if not storing offline
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277 elseif stanza.name == "iq" then
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278 -- TODO send IQ error
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279 end
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280 else -- user does not exist
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281 -- 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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282 if stanza.name == "presence" then
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283 if stanza.attr.type == "probe" then
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284 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
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285 end
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286 -- else ignore
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287 else
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288 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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289 end
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290 end
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291 end
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292 elseif origin.type == "c2s" then
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293 -- Remote host
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294 local xmlns = stanza.attr.xmlns;
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295 --stanza.attr.xmlns = "jabber:server";
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296 stanza.attr.xmlns = nil;
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297 log("debug", "sending s2s stanza: %s", tostring(stanza));
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298 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
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299 stanza.attr.xmlns = xmlns; -- reset
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300 elseif origin.type == "component" or origin.type == "local" then
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301 -- Route via s2s for components and modules
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302 log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
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303 for k,v in pairs(origin) do print("origin:", tostring(k), tostring(v)); end
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304 print(tostring(host), tostring(from_host))
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305 send_s2s(origin.host, host, stanza);
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306 else
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307 log("warn", "received stanza from unhandled connection type: %s", origin.type);
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308 end
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309 stanza.attr.to = to; -- reset
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310 end
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311
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312 function handle_stanza_toremote(stanza)
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313 log("error", "Stanza bound for remote host, but s2s is not implemented");
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314 end
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315
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316