prosody
82705ec87253
plugins/mod_proxy65.lua

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plugins/mod_proxy65.lua @ 10390:82705ec87253 0.11

util.startup: Ensure prosody.paths are absolute (see #1430) Normally these paths are injected into the installed 'prosody' executable as absolute paths, but it is possible to override at least the config path via environment variable or command line argument. This makes sure a path relative to pwd stays relative to that instead of the data directory.
author Kim Alvefur <zash@zash.se>
date Mon, 04 Nov 2019 00:29:49 +0100
parent 9645:cc642c9c5ad5
child 10111:0f335815244f
child 11555:65dcc175ef5b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2011 Matthew Wild
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3 -- Copyright (C) 2008-2011 Waqas Hussain
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4 -- Copyright (C) 2009 Thilo Cestonaro
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 module:set_global();
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11
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12 local jid_compare, jid_prep = require "util.jid".compare, require "util.jid".prep;
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13 local st = require "util.stanza";
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14 local sha1 = require "util.hashes".sha1;
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15 local b64 = require "util.encodings".base64.encode;
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16 local server = require "net.server";
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17 local portmanager = require "core.portmanager";
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18
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19 local sessions = module:shared("sessions");
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20 local transfers = module:shared("transfers");
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21 local max_buffer_size = 4096;
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22
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23 local listener = {};
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24
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25 function listener.onincoming(conn, data)
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26 local session = sessions[conn] or {};
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27
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28 local transfer = transfers[session.sha];
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29 if transfer and transfer.activated then -- copy data between initiator and target
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30 local initiator, target = transfer.initiator, transfer.target;
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31 (conn == initiator and target or initiator):write(data);
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32 return;
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33 end -- FIXME server.link should be doing this?
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34
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35 if not session.greeting_done then
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36 local nmethods = data:byte(2) or 0;
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37 if data:byte(1) == 0x05 and nmethods > 0 and #data == 2 + nmethods then -- check if we have all the data
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38 if data:find("%z") then -- 0x00 = 'No authentication' is supported
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39 session.greeting_done = true;
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40 sessions[conn] = session;
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41 conn:write("\5\0"); -- send (SOCKS version 5, No authentication)
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42 module:log("debug", "SOCKS5 greeting complete");
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43 return;
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44 end
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45 end -- else error, unexpected input
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46 conn:write("\5\255"); -- send (SOCKS version 5, no acceptable method)
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47 conn:close();
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48 module:log("debug", "Invalid SOCKS5 greeting received: '%s'", b64(data));
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49 else -- connection request
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50 --local head = string.char( 0x05, 0x01, 0x00, 0x03, 40 ); -- ( VER=5=SOCKS5, CMD=1=CONNECT, RSV=0=RESERVED, ATYP=3=DOMAIMNAME, SHA-1 size )
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51 if #data == 47 and data:sub(1,5) == "\5\1\0\3\40" and data:sub(-2) == "\0\0" then
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52 local sha = data:sub(6, 45);
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53 conn:pause();
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54 conn:write("\5\0\0\3\40" .. sha .. "\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
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55 if not transfers[sha] then
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56 transfers[sha] = {};
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57 transfers[sha].target = conn;
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58 session.sha = sha;
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59 module:log("debug", "SOCKS5 target connected for session %s", sha);
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60 else -- transfers[sha].target ~= nil
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61 transfers[sha].initiator = conn;
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62 session.sha = sha;
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63 module:log("debug", "SOCKS5 initiator connected for session %s", sha);
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64 server.link(conn, transfers[sha].target, max_buffer_size);
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65 server.link(transfers[sha].target, conn, max_buffer_size);
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66 end
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67 else -- error, unexpected input
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68 conn:write("\5\1\0\3\0\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
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69 conn:close();
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70 module:log("debug", "Invalid SOCKS5 negotiation received: '%s'", b64(data));
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71 end
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72 end
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73 end
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74
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75 function listener.ondisconnect(conn)
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76 local session = sessions[conn];
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77 if session then
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78 if transfers[session.sha] then
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79 local initiator, target = transfers[session.sha].initiator, transfers[session.sha].target;
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80 if initiator == conn and target ~= nil then
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81 target:close();
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82 elseif target == conn and initiator ~= nil then
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83 initiator:close();
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84 end
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85 transfers[session.sha] = nil;
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86 end
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87 -- Clean up any session-related stuff here
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88 sessions[conn] = nil;
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89 end
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90 end
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91
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92 function module.add_host(module)
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93 local host, name = module:get_host(), module:get_option_string("name", "SOCKS5 Bytestreams Service");
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94
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95 local proxy_address = module:get_option_string("proxy65_address", host);
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96 local proxy_acl = module:get_option_array("proxy65_acl");
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97
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98 -- COMPAT w/pre-0.9 where proxy65_port was specified in the components section of the config
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99 local legacy_config = module:get_option_number("proxy65_port");
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100 if legacy_config then
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101 module:log("warn", "proxy65_port is deprecated, please put proxy65_ports = { %d } into the global section instead", legacy_config);
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102 end
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103
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104 module:depends("disco");
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105 module:add_identity("proxy", "bytestreams", name);
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106 module:add_feature("http://jabber.org/protocol/bytestreams");
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107
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108 module:hook("iq-get/host/http://jabber.org/protocol/bytestreams:query", function(event)
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109 local origin, stanza = event.origin, event.stanza;
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110
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111 -- check ACL
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112 -- using 'while' instead of 'if' so we can break out of it
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113 while proxy_acl and #proxy_acl > 0 do --luacheck: ignore 512
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114 local jid = stanza.attr.from;
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115 local allow;
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116 for _, acl in ipairs(proxy_acl) do
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117 if jid_compare(jid, acl) then allow = true; break; end
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118 end
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119 if allow then break; end
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120 module:log("warn", "Denying use of proxy for %s", tostring(stanza.attr.from));
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121 origin.send(st.error_reply(stanza, "auth", "forbidden"));
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122 return true;
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123 end
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124
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125 local proxy_port = next(portmanager.get_active_services():search("proxy65", nil)[1] or {});
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126 if not proxy_port then
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127 module:log("warn", "Not listening on any port");
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128 origin.send(st.error_reply(stanza, "wait", "item-not-found", "Not listening on any port"));
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129 return true;
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130 end
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131
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132 local sid = stanza.tags[1].attr.sid;
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133 origin.send(st.reply(stanza):tag("query", {xmlns="http://jabber.org/protocol/bytestreams", sid=sid})
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134 :tag("streamhost", {jid=host, host=proxy_address, port=("%d"):format(proxy_port)}));
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135 return true;
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136 end);
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137
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138 module:hook("iq-set/host/http://jabber.org/protocol/bytestreams:query", function(event)
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139 local origin, stanza = event.origin, event.stanza;
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140
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141 local query = stanza.tags[1];
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142 local sid = query.attr.sid;
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143 local from = stanza.attr.from;
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144 local to = query:get_child_text("activate");
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145 local prepped_to = jid_prep(to);
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146
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147 local info = "sid: "..tostring(sid)..", initiator: "..tostring(from)..", target: "..tostring(prepped_to or to);
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148 if prepped_to and sid then
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149 local sha = sha1(sid .. from .. prepped_to, true);
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150 if not transfers[sha] then
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151 module:log("debug", "Activation request has unknown session id; activation failed (%s)", info);
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152 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
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153 elseif not transfers[sha].initiator then
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154 module:log("debug", "The sender was not connected to the proxy; activation failed (%s)", info);
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155 origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The sender (you) is not connected to the proxy"));
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156 --elseif not transfers[sha].target then -- can't happen, as target is set when a transfer object is created
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157 -- module:log("debug", "The recipient was not connected to the proxy; activation failed (%s)", info);
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158 -- origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The recipient is not connected to the proxy"));
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diff changeset
159 else -- if transfers[sha].initiator ~= nil and transfers[sha].target ~= nil then
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160 module:log("debug", "Transfer activated (%s)", info);
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161 transfers[sha].activated = true;
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162 transfers[sha].target:resume();
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163 transfers[sha].initiator:resume();
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164 origin.send(st.reply(stanza));
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165 end
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166 elseif to and sid then
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167 module:log("debug", "Malformed activation jid; activation failed (%s)", info);
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168 origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
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169 else
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170 module:log("debug", "Bad request; activation failed (%s)", info);
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171 origin.send(st.error_reply(stanza, "modify", "bad-request"));
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172 end
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173 return true;
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174 end);
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parents:
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175 end
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parents:
diff changeset
176
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177 module:provides("net", {
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178 default_port = 5000;
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179 listener = listener;
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180 multiplex = {
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181 pattern = "^\5";
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182 };
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183 });