prosody
feaef6215bb8
plugins/mod_proxy65.lua

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plugins/mod_proxy65.lua @ 9307:feaef6215bb8

util.stanza: Don't automatically generate ids for iq stanzas Users of this API should provide their own id attribute that meets their uniqueness requirements. The current implementation leaks information (i.e. how many iq stanzas have been sent by the server to other JIDs). Providing any strong guarantees of randomness here would need to pull in additional dependencies that we don't want in this simple library.
author Matthew Wild <mwild1@gmail.com>
date Thu, 13 Sep 2018 16:35:48 +0100
parent 9146:6bd3602a70e2
child 9645:cc642c9c5ad5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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_port = next(portmanager.get_active_services():search("proxy65", nil)[1] or {});
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97 local proxy_acl = module:get_option_array("proxy65_acl");
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98
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99 -- COMPAT w/pre-0.9 where proxy65_port was specified in the components section of the config
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100 local legacy_config = module:get_option_number("proxy65_port");
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101 if legacy_config then
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102 module:log("warn", "proxy65_port is deprecated, please put proxy65_ports = { %d } into the global section instead", legacy_config);
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103 end
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104
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105 module:depends("disco");
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106 module:add_identity("proxy", "bytestreams", name);
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107 module:add_feature("http://jabber.org/protocol/bytestreams");
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108
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109 module:hook("iq-get/host/http://jabber.org/protocol/bytestreams:query", function(event)
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110 local origin, stanza = event.origin, event.stanza;
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111
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112 -- check ACL
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113 -- using 'while' instead of 'if' so we can break out of it
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Matthew Wild <mwild1@gmail.com>
parents: 8642
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114 while proxy_acl and #proxy_acl > 0 do --luacheck: ignore 512
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parents: 4414
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115 local jid = stanza.attr.from;
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9a01c6bc435e mod_proxy65: Fix ACL
Kim Alvefur <zash@zash.se>
parents: 4917
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116 local allow;
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Matthew Wild <mwild1@gmail.com>
parents: 4414
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117 for _, acl in ipairs(proxy_acl) do
4921
9a01c6bc435e mod_proxy65: Fix ACL
Kim Alvefur <zash@zash.se>
parents: 4917
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118 if jid_compare(jid, acl) then allow = true; break; end
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
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119 end
4921
9a01c6bc435e mod_proxy65: Fix ACL
Kim Alvefur <zash@zash.se>
parents: 4917
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120 if allow then break; end
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
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121 module:log("warn", "Denying use of proxy for %s", tostring(stanza.attr.from));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
122 origin.send(st.error_reply(stanza, "auth", "forbidden"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
123 return true;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
124 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5375
diff changeset
125
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
126 local sid = stanza.tags[1].attr.sid;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
127 origin.send(st.reply(stanza):tag("query", {xmlns="http://jabber.org/protocol/bytestreams", sid=sid})
8642
d2556f237bc2 mod_proxy65: Fix passing number to stanza API (thanks mimi89999)
Matthew Wild <mwild1@gmail.com>
parents: 6948
diff changeset
128 :tag("streamhost", {jid=host, host=proxy_address, port=("%d"):format(proxy_port)}));
4374
c38f20f172b3 mod_proxy65: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 3694
diff changeset
129 return true;
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
130 end);
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Florian Zeitz <florob@babelmonkeys.de>
parents: 5375
diff changeset
131
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
132 module:hook("iq-set/host/http://jabber.org/protocol/bytestreams:query", function(event)
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
133 local origin, stanza = event.origin, event.stanza;
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bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5375
diff changeset
134
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
135 local query = stanza.tags[1];
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
136 local sid = query.attr.sid;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
137 local from = stanza.attr.from;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
138 local to = query:get_child_text("activate");
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
139 local prepped_to = jid_prep(to);
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bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5375
diff changeset
140
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
141 local info = "sid: "..tostring(sid)..", initiator: "..tostring(from)..", target: "..tostring(prepped_to or to);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
142 if prepped_to and sid then
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
143 local sha = sha1(sid .. from .. prepped_to, true);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
144 if not transfers[sha] then
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
145 module:log("debug", "Activation request has unknown session id; activation failed (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
146 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
147 elseif not transfers[sha].initiator then
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
148 module:log("debug", "The sender was not connected to the proxy; activation failed (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
149 origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The sender (you) is not connected to the proxy"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
150 --elseif not transfers[sha].target then -- can't happen, as target is set when a transfer object is created
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
151 -- module:log("debug", "The recipient was not connected to the proxy; activation failed (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
152 -- origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The recipient is not connected to the proxy"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
153 else -- if transfers[sha].initiator ~= nil and transfers[sha].target ~= nil then
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
154 module:log("debug", "Transfer activated (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
155 transfers[sha].activated = true;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
156 transfers[sha].target:resume();
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
157 transfers[sha].initiator:resume();
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
158 origin.send(st.reply(stanza));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
159 end
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
160 elseif to and sid then
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
161 module:log("debug", "Malformed activation jid; activation failed (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
162 origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
163 else
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
164 module:log("debug", "Bad request; activation failed (%s)", info);
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
165 origin.send(st.error_reply(stanza, "modify", "bad-request"));
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
166 end
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
167 return true;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
168 end);
2137
c5d87a3316f8 mod_proxy65: Import from prosody-modules, thanks Ephraim :)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
169 end
c5d87a3316f8 mod_proxy65: Import from prosody-modules, thanks Ephraim :)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
171 module:provides("net", {
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
172 default_port = 5000;
5b52b5eaa03d mod_proxy65: Port to portmanager, make a shared module
Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
173 listener = listener;
4685
3d90264c7b3d mod_proxy65: Add multiplex pattern.
Waqas Hussain <waqas20@gmail.com>
parents: 4679
diff changeset
174 multiplex = {
3d90264c7b3d mod_proxy65: Add multiplex pattern.
Waqas Hussain <waqas20@gmail.com>
parents: 4679
diff changeset
175 pattern = "^\5";
3d90264c7b3d mod_proxy65: Add multiplex pattern.
Waqas Hussain <waqas20@gmail.com>
parents: 4679
diff changeset
176 };
4679
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Matthew Wild <mwild1@gmail.com>
parents: 4414
diff changeset
177 });