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plugins/mod_component.lua @ 10980:eaee72c7afbd
util.dbuffer: If no bytes parameter passed to read, return remainder of frontmost chunk
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 29 Jun 2020 12:51:28 +0100 |
parent | 10716:29575fe64860 |
child | 11034:233196135048 |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 module:set_global(); |
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10 |
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11 local t_concat = table.concat; |
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12 local tostring, type = tostring, type; |
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13 local xpcall = require "util.xpcall".xpcall; |
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14 local traceback = debug.traceback; |
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15 |
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16 local logger = require "util.logger"; |
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17 local sha1 = require "util.hashes".sha1; |
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mod_*: Fix a load of global accesses
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18 local st = require "util.stanza"; |
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19 |
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20 local jid_split = require "util.jid".split; |
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21 local new_xmpp_stream = require "util.xmppstream".new; |
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22 local uuid_gen = require "util.uuid".generate; |
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23 |
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mod_admin_adhoc, mod_admin_telnet, mod_bosh, mod_c2s, mod_component, mod_pep, mod_presence, mod_roster, mod_s2s: Import core_post_stanza from the global prosody table.
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24 local core_process_stanza = prosody.core_process_stanza; |
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25 local hosts = prosody.hosts; |
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26 |
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27 local log = module._log; |
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28 |
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29 local opt_keepalives = module:get_option_boolean("component_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true)); |
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30 |
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31 local sessions = module:shared("sessions"); |
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32 |
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33 local function keepalive(event) |
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34 local session = event.session; |
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35 if not session.notopen then |
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36 return event.session.send(' '); |
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37 end |
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38 end |
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39 |
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40 function module.add_host(module) |
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41 if module:get_host_type() ~= "component" then |
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42 error("Don't load mod_component manually, it should be for a component, please see https://prosody.im/doc/components", 0); |
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43 end |
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44 |
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45 local env = module.environment; |
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46 env.connected = false; |
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47 env.session = false; |
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48 |
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49 local send; |
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50 |
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51 local function on_destroy(session, err) --luacheck: ignore 212/err |
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52 module:set_status("warn", err and ("Disconnected: "..err) or "Disconnected"); |
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53 env.connected = false; |
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54 env.session = false; |
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55 send = nil; |
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56 session.on_destroy = nil; |
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57 end |
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58 |
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59 -- Handle authentication attempts by component |
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60 local function handle_component_auth(event) |
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61 local session, stanza = event.origin, event.stanza; |
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62 |
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63 if session.type ~= "component_unauthed" then return; end |
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64 |
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65 if (not session.host) or #stanza.tags > 0 then |
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66 (session.log or log)("warn", "Invalid component handshake for host: %s", session.host); |
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67 session:close("not-authorized"); |
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68 return true; |
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69 end |
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70 |
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71 local secret = module:get_option_string("component_secret"); |
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72 if not secret then |
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73 (session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host); |
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74 session:close("not-authorized"); |
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75 return true; |
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76 end |
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77 |
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78 local supplied_token = t_concat(stanza); |
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79 local calculated_token = sha1(session.streamid..secret, true); |
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80 if supplied_token:lower() ~= calculated_token:lower() then |
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81 module:log("info", "Component authentication failed for %s", session.host); |
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82 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" }; |
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83 return true; |
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84 end |
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85 |
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86 if env.connected then |
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87 local policy = module:get_option_string("component_conflict_resolve", "kick_new"); |
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88 if policy == "kick_old" then |
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89 env.session:close{ condition = "conflict", text = "Replaced by a new connection" }; |
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90 else -- kick_new |
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91 module:log("error", "Second component attempted to connect, denying connection"); |
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92 session:close{ condition = "conflict", text = "Component already connected" }; |
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93 return true; |
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94 end |
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95 end |
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96 |
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97 env.connected = true; |
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98 env.session = session; |
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99 send = session.send; |
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100 session.on_destroy = on_destroy; |
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101 session.component_validate_from = module:get_option_boolean("validate_from_addresses", true); |
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102 session.type = "component"; |
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103 module:log("info", "External component successfully authenticated"); |
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104 session.send(st.stanza("handshake")); |
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105 module:fire_event("component-authenticated", { session = session }); |
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106 module:set_status("info", "Connected"); |
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107 |
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108 return true; |
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109 end |
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110 module:hook("stanza/jabber:component:accept:handshake", handle_component_auth, -1); |
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111 |
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112 -- Handle stanzas addressed to this component |
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113 local function handle_stanza(event) |
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114 local stanza = event.stanza; |
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115 if send then |
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116 stanza.attr.xmlns = nil; |
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117 send(stanza); |
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118 else |
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119 if stanza.name == "iq" and stanza.attr.type == "get" and stanza.attr.to == module.host then |
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120 local query = stanza.tags[1]; |
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121 local node = query.attr.node; |
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122 if query.name == "query" and query.attr.xmlns == "http://jabber.org/protocol/disco#info" and (not node or node == "") then |
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123 local name = module:get_option_string("name"); |
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124 if name then |
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125 local reply = st.reply(stanza):tag("query", { xmlns = "http://jabber.org/protocol/disco#info" }) |
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126 :tag("identity", { category = "component", type = "generic", name = module:get_option_string("name", "Prosody") }):up() |
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127 :tag("feature", { var = "http://jabber.org/protocol/disco#info" }):up(); |
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128 event.origin.send(reply); |
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129 return true; |
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130 end |
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131 end |
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132 end |
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133 module:log("warn", "Component not connected, bouncing error for: %s", stanza:top_tag()); |
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134 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then |
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135 event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable", module.host)); |
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136 end |
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137 end |
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138 return true; |
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139 end |
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140 |
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141 module:hook("iq/bare", handle_stanza, -1); |
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142 module:hook("message/bare", handle_stanza, -1); |
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143 module:hook("presence/bare", handle_stanza, -1); |
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144 module:hook("iq/full", handle_stanza, -1); |
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145 module:hook("message/full", handle_stanza, -1); |
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146 module:hook("presence/full", handle_stanza, -1); |
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147 module:hook("iq/host", handle_stanza, -1); |
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148 module:hook("message/host", handle_stanza, -1); |
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149 module:hook("presence/host", handle_stanza, -1); |
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150 |
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151 module:hook("component-read-timeout", keepalive, -1); |
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152 end |
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153 |
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154 module:hook("component-read-timeout", keepalive, -1); |
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155 |
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156 --- Network and stream part --- |
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157 |
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158 local xmlns_component = 'jabber:component:accept'; |
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159 |
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160 local listener = {}; |
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161 |
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162 --- Callbacks/data for xmppstream to handle streams for us --- |
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163 |
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164 local stream_callbacks = { default_ns = xmlns_component }; |
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165 |
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166 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams"; |
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167 |
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168 function stream_callbacks.error(session, error, data) |
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169 if session.destroyed then return; end |
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170 module:log("warn", "Error processing component stream: %s", error); |
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171 if error == "no-stream" then |
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172 session:close("invalid-namespace"); |
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173 elseif error == "parse-error" then |
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174 session.log("warn", "External component %s XML parse error: %s", session.host, data); |
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175 session:close("not-well-formed"); |
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176 elseif error == "stream-error" then |
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177 local condition, text = "undefined-condition"; |
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178 for child in data:childtags(nil, xmlns_xmpp_streams) do |
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179 if child.name ~= "text" then |
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180 condition = child.name; |
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181 else |
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182 text = child:get_text(); |
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183 end |
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184 if condition ~= "undefined-condition" and text then |
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185 break; |
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186 end |
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187 end |
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188 text = condition .. (text and (" ("..text..")") or ""); |
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189 session.log("info", "Session closed by remote with error: %s", text); |
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190 session:close(nil, text); |
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191 end |
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192 end |
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193 |
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194 function stream_callbacks.streamopened(session, attr) |
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195 if not hosts[attr.to] or not hosts[attr.to].modules.component then |
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196 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" }; |
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197 return; |
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198 end |
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199 session.host = attr.to; |
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200 session.streamid = uuid_gen(); |
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201 session.notopen = nil; |
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202 -- Return stream header |
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203 session:open_stream(); |
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204 end |
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205 |
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206 function stream_callbacks.streamclosed(session) |
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207 session.log("debug", "Received </stream:stream>"); |
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208 session:close(); |
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209 end |
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210 |
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211 local function handleerr(err) log("error", "Traceback[component]: %s", traceback(err, 2)); end |
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212 function stream_callbacks.handlestanza(session, stanza) |
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213 -- Namespaces are icky. |
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214 if not stanza.attr.xmlns and stanza.name == "handshake" then |
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215 stanza.attr.xmlns = xmlns_component; |
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216 end |
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217 if not stanza.attr.xmlns or stanza.attr.xmlns == "jabber:client" then |
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218 local from = stanza.attr.from; |
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219 if from then |
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220 if session.component_validate_from then |
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221 local _, domain = jid_split(stanza.attr.from); |
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222 if domain ~= session.host then |
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223 -- Return error |
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224 session.log("warn", "Component sent stanza with missing or invalid 'from' address"); |
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225 session:close{ |
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226 condition = "invalid-from"; |
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227 text = "Component tried to send from address <"..tostring(from) |
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228 .."> which is not in domain <"..tostring(session.host)..">"; |
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229 }; |
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230 return; |
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231 end |
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232 end |
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233 else |
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234 stanza.attr.from = session.host; -- COMPAT: Strictly we shouldn't allow this |
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235 end |
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236 if not stanza.attr.to then |
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237 session.log("warn", "Rejecting stanza with no 'to' address"); |
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238 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST specify a 'to' address on stanzas")); |
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239 return; |
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240 end |
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241 end |
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242 |
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243 if stanza then |
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244 return xpcall(core_process_stanza, handleerr, session, stanza); |
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245 end |
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246 end |
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247 |
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248 --- Closing a component connection |
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249 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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250 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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251 local function session_close(session, reason) |
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252 if session.destroyed then return; end |
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253 if session.conn then |
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254 if session.notopen then |
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255 session.send("<?xml version='1.0'?>"); |
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256 session.send(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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257 end |
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258 if reason then |
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259 if type(reason) == "string" then -- assume stream error |
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260 module:log("info", "Disconnecting component, <stream:error> is: %s", reason); |
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261 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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262 elseif type(reason) == "table" then |
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263 if reason.condition then |
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264 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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265 if reason.text then |
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266 stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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267 end |
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268 if reason.extra then |
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269 stanza:add_child(reason.extra); |
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270 end |
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271 module:log("info", "Disconnecting component, <stream:error> is: %s", stanza); |
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272 session.send(stanza); |
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273 elseif reason.name then -- a stanza |
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274 module:log("info", "Disconnecting component, <stream:error> is: %s", reason); |
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275 session.send(reason); |
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276 end |
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277 end |
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278 end |
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279 session.send("</stream:stream>"); |
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280 session.conn:close(); |
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281 listener.ondisconnect(session.conn, "stream error"); |
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282 end |
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283 end |
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284 |
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285 --- Component connlistener |
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286 |
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287 function listener.onconnect(conn) |
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288 local _send = conn.write; |
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289 local session = { type = "component_unauthed", conn = conn, send = function (data) return _send(conn, tostring(data)); end }; |
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290 |
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291 -- Logging functions -- |
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292 local conn_name = "jcp"..tostring(session):match("[a-f0-9]+$"); |
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293 session.log = logger.init(conn_name); |
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294 session.close = session_close; |
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295 |
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296 if opt_keepalives then |
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297 conn:setoption("keepalive", opt_keepalives); |
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298 end |
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299 |
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300 session.log("info", "Incoming Jabber component connection"); |
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301 |
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302 local stream = new_xmpp_stream(session, stream_callbacks); |
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303 session.stream = stream; |
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304 |
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305 session.notopen = true; |
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306 |
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307 function session.reset_stream() |
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308 session.notopen = true; |
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309 session.stream:reset(); |
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310 end |
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311 |
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312 function session.data(_, data) |
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313 local ok, err = stream:feed(data); |
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314 if ok then return; end |
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315 log("debug", "Received invalid XML (%s) %d bytes: %q", err, #data, data:sub(1, 300)); |
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316 session:close("not-well-formed"); |
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317 end |
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318 |
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319 session.dispatch_stanza = stream_callbacks.handlestanza; |
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320 |
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321 sessions[conn] = session; |
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322 end |
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323 function listener.onincoming(conn, data) |
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324 local session = sessions[conn]; |
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325 session.data(conn, data); |
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326 end |
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327 function listener.ondisconnect(conn, err) |
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328 local session = sessions[conn]; |
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329 if session then |
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330 (session.log or log)("info", "component disconnected: %s (%s)", session.host, err); |
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331 if session.host then |
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332 module:context(session.host):fire_event("component-disconnected", { session = session, reason = err }); |
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333 end |
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334 if session.on_destroy then session:on_destroy(err); end |
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335 sessions[conn] = nil; |
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336 for k in pairs(session) do |
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337 if k ~= "log" and k ~= "close" then |
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338 session[k] = nil; |
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339 end |
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340 end |
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341 session.destroyed = true; |
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342 end |
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343 end |
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344 |
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345 function listener.ondetach(conn) |
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346 sessions[conn] = nil; |
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347 end |
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348 |
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349 function listener.onreadtimeout(conn) |
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350 local session = sessions[conn]; |
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351 if session then |
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352 return (hosts[session.host] or prosody).events.fire_event("component-read-timeout", { session = session }); |
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353 end |
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354 end |
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355 |
5120
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356 module:provides("net", { |
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357 name = "component"; |
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358 private = true; |
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359 listener = listener; |
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360 default_port = 5347; |
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361 multiplex = { |
5316
310c7e5bb906
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362 pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:component:accept%1.*>"; |
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363 }; |
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364 }); |