prosody-modules
d9022fe9749c
mod_tcpproxy/mod_tcpproxy.lua

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mod_tcpproxy/mod_tcpproxy.lua @ 2598:d9022fe9749c

luacheckrc: List module instance fields
author Kim Alvefur <zash@zash.se>
date Mon, 06 Mar 2017 00:43:22 +0100
parent 1865:db8b256f51ff
child 4853:3804332c204e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local st = require "util.stanza";
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3 local xmlns_ibb = "http://jabber.org/protocol/ibb";
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4 local xmlns_tcp = "http://prosody.im/protocol/tcpproxy";
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6 local host_attr, port_attr = xmlns_tcp.."\1host", xmlns_tcp.."\1port";
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8 local base64 = require "util.encodings".base64;
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9 local b64, unb64 = base64.encode, base64.decode;
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11 local host = module.host;
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13 local open_connections = {};
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15 local function new_session(jid, sid, conn)
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16 if not open_connections[jid] then
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17 open_connections[jid] = {};
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18 end
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19 open_connections[jid][sid] = conn;
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20 end
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21 local function close_session(jid, sid)
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22 if open_connections[jid] then
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23 open_connections[jid][sid] = nil;
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24 if next(open_connections[jid]) == nil then
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25 open_connections[jid] = nil;
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26 end
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27 return true;
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28 end
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29 end
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31 function proxy_component(origin, stanza)
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32 local ibb_tag = stanza.tags[1];
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33 if (not (stanza.name == "iq" and stanza.attr.type == "set")
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34 and stanza.name ~= "message")
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35 or
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36 (not (ibb_tag)
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37 or ibb_tag.attr.xmlns ~= xmlns_ibb) then
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38 if stanza.attr.type ~= "error" then
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39 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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40 end
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41 return;
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42 end
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43
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44 if ibb_tag.name == "open" then
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45 -- Starting a new stream
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46 local to_host, to_port = ibb_tag.attr[host_attr], ibb_tag.attr[port_attr];
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47 local jid, sid = stanza.attr.from, ibb_tag.attr.sid;
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48 if not (to_host and to_port) then
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49 origin.send(st.error_reply(stanza, "modify", "bad-request", "No host/port specified"));
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50 return true;
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51 elseif not sid or sid == "" then
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52 origin.send(st.error_reply(stanza, "modify", "bad-request", "No sid specified"));
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53 return true;
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54 elseif ibb_tag.attr.stanza ~= "message" then
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55 origin.send(st.error_reply(stanza, "modify", "bad-request", "Only 'message' stanza transport is supported"));
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56 return true;
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57 end
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58 local conn, err = socket.tcp();
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59 if not conn then
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60 origin.send(st.error_reply(stanza, "wait", "resource-constraint", err));
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61 return true;
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62 end
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63 conn:settimeout(0);
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64
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65 local success, err = conn:connect(to_host, to_port);
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66 if not success and err ~= "timeout" then
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67 origin.send(st.error_reply(stanza, "wait", "remote-server-not-found", err));
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68 return true;
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69 end
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70
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71 local listener,seq = {}, 0;
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72 function listener.onconnect(conn)
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73 origin.send(st.reply(stanza));
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74 end
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75 function listener.onincoming(conn, data)
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76 origin.send(st.message({to=jid,from=host})
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77 :tag("data", {xmlns=xmlns_ibb,seq=seq,sid=sid})
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78 :text(b64(data)));
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79 seq = seq + 1;
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80 end
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81 function listener.ondisconnect(conn, err)
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82 origin.send(st.message({to=jid,from=host})
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83 :tag("close", {xmlns=xmlns_ibb,sid=sid}));
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84 close_session(jid, sid);
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85 end
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86
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87 conn = server.wrapclient(conn, to_host, to_port, listener, "*a" );
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88 new_session(jid, sid, conn);
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89 elseif ibb_tag.name == "data" then
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90 local conn = open_connections[stanza.attr.from][ibb_tag.attr.sid];
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91 if conn then
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92 local data = unb64(ibb_tag:get_text());
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93 if data then
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94 conn:write(data);
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95 else
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96 origin.send(
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97 st.error_reply(stanza, "modify", "bad-request", "Invalid data (base64?)")
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98 );
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99 return true;
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100 end
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101 else
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102 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
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103 return true;
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104 end
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105 elseif ibb_tag.name == "close" then
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106 if close_session(stanza.attr.from, ibb_tag.attr.sid) then
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107 origin.send(st.reply(stanza));
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108 else
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109 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
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110 return true;
147
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111 end
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112 end
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113 end
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114
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115 local function stanza_handler(event)
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116 proxy_component(event.origin, event.stanza);
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117 return true;
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118 end
283
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119 module:hook("iq/bare", stanza_handler, -1);
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120 module:hook("message/bare", stanza_handler, -1);
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121 module:hook("presence/bare", stanza_handler, -1);
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122 module:hook("iq/full", stanza_handler, -1);
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123 module:hook("message/full", stanza_handler, -1);
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124 module:hook("presence/full", stanza_handler, -1);
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125 module:hook("iq/host", stanza_handler, -1);
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126 module:hook("message/host", stanza_handler, -1);
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127 module:hook("presence/host", stanza_handler, -1);
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128
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129 require "core.componentmanager".register_component(host, function() end); -- COMPAT Prosody 0.7