prosody
70ac7d23673d
util/adminstream.lua

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util/adminstream.lua @ 10855:70ac7d23673d

mod_admin_socket, util.adminstream: New module to manage a local unix domain socket for admin functionality
author Matthew Wild <mwild1@gmail.com>
date Mon, 01 Jun 2020 15:42:19 +0100
child 10875:09674bbb833f
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10855
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1 local st = require "util.stanza";
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2 local new_xmpp_stream = require "util.xmppstream".new;
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3 local sessionlib = require "util.session";
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4 local gettime = require "util.time".now;
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5 local runner = require "util.async".runner;
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6 local add_task = require "util.timer".add_task;
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7 local events = require "util.events";
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8
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9 local stream_close_timeout = 5;
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10
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11 local log = require "util.logger".init("adminstream");
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12
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13 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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14
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15 local stream_callbacks = { default_ns = "xmpp:prosody.im/admin" };
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16
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17 function stream_callbacks.streamopened(session, attr)
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18 -- run _streamopened in async context
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19 session.thread:run({ stream = "opened", attr = attr });
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20 end
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21
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22 function stream_callbacks._streamopened(session, attr) --luacheck: ignore 212/attr
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23 if session.type ~= "client" then
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24 session:open_stream();
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25 end
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26 session.notopen = nil;
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27 end
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28
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29 function stream_callbacks.streamclosed(session, attr)
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30 -- run _streamclosed in async context
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31 session.thread:run({ stream = "closed", attr = attr });
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32 end
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33
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34 function stream_callbacks._streamclosed(session)
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35 session.log("debug", "Received </stream:stream>");
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36 session:close(false);
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37 end
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38
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39 function stream_callbacks.error(session, error, data)
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40 if error == "no-stream" then
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41 session.log("debug", "Invalid opening stream header (%s)", (data:gsub("^([^\1]+)\1", "{%1}")));
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42 session:close("invalid-namespace");
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43 elseif error == "parse-error" then
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44 session.log("debug", "Client XML parse error: %s", data);
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45 session:close("not-well-formed");
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46 elseif error == "stream-error" then
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47 local condition, text = "undefined-condition";
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48 for child in data:childtags(nil, xmlns_xmpp_streams) do
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49 if child.name ~= "text" then
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50 condition = child.name;
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51 else
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52 text = child:get_text();
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53 end
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54 if condition ~= "undefined-condition" and text then
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55 break;
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56 end
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57 end
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58 text = condition .. (text and (" ("..text..")") or "");
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59 session.log("info", "Session closed by remote with error: %s", text);
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60 session:close(nil, text);
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61 end
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62 end
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63
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64 function stream_callbacks.handlestanza(session, stanza)
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65 session.thread:run(stanza);
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66 end
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67
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68 local runner_callbacks = {};
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69
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70 function runner_callbacks:error(err)
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71 self.data.log("error", "Traceback[c2s]: %s", err);
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72 end
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73
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74 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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75
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76 local function destroy_session(session, reason)
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77 if session.destroyed then return; end
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78 session.destroyed = true;
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79 session.log("debug", "Destroying session: %s", reason or "unknown reason");
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80 end
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81
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82 local function session_close(session, reason)
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83 local log = session.log or log;
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84 if session.conn then
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85 if session.notopen then
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86 session:open_stream();
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87 end
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88 if reason then -- nil == no err, initiated by us, false == initiated by client
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89 local stream_error = st.stanza("stream:error");
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90 if type(reason) == "string" then -- assume stream error
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91 stream_error:tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' });
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92 elseif type(reason) == "table" then
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93 if reason.condition then
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94 stream_error:tag(reason.condition, stream_xmlns_attr):up();
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95 if reason.text then
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96 stream_error:tag("text", stream_xmlns_attr):text(reason.text):up();
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97 end
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98 if reason.extra then
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99 stream_error:add_child(reason.extra);
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100 end
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101 elseif reason.name then -- a stanza
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102 stream_error = reason;
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103 end
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104 end
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105 stream_error = tostring(stream_error);
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106 log("debug", "Disconnecting client, <stream:error> is: %s", stream_error);
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107 session.send(stream_error);
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108 end
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109
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110 session.send("</stream:stream>");
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111 function session.send() return false; end
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112
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113 local reason_text = (reason and (reason.name or reason.text or reason.condition)) or reason;
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114 session.log("debug", "c2s stream for %s closed: %s", session.full_jid or session.ip or "<unknown>", reason_text or "session closed");
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115
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116 -- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote
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117 local conn = session.conn;
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118 if reason_text == nil and not session.notopen and session.type == "c2s" then
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119 -- Grace time to process data from authenticated cleanly-closed stream
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120 add_task(stream_close_timeout, function ()
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121 if not session.destroyed then
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122 session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
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123 destroy_session(session);
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124 conn:close();
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125 end
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126 end);
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127 else
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128 destroy_session(session, reason_text);
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129 conn:close();
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130 end
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131 else
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132 local reason_text = (reason and (reason.name or reason.text or reason.condition)) or reason;
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133 destroy_session(session, reason_text);
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134 end
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135 end
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136
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137 --- Public methods
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138
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139 local function new_server(sessions, stanza_handler)
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140 local listeners = {};
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141
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142 function listeners.onconnect(conn)
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143 log("debug", "New connection");
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144 local session = sessionlib.new("admin");
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145 sessionlib.set_id(session);
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146 sessionlib.set_logger(session);
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147 sessionlib.set_conn(session, conn);
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148
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149 session.conntime = gettime();
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150 session.type = "admin";
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151
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152 local stream = new_xmpp_stream(session, stream_callbacks);
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153 session.stream = stream;
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154 session.notopen = true;
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155
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156 session.thread = runner(function (stanza)
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157 if st.is_stanza(stanza) then
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158 stanza_handler(session, stanza);
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159 elseif stanza.stream == "opened" then
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160 stream_callbacks._streamopened(session, stanza.attr);
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161 elseif stanza.stream == "closed" then
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162 stream_callbacks._streamclosed(session, stanza.attr);
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163 end
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164 end, runner_callbacks, session);
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165
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166 function session.data(data)
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167 -- Parse the data, which will store stanzas in session.pending_stanzas
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168 if data then
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169 local ok, err = stream:feed(data);
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170 if not ok then
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171 session.log("debug", "Received invalid XML (%s) %d bytes: %q", err, #data, data:sub(1, 300));
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172 session:close("not-well-formed");
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173 end
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174 end
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175 end
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diff changeset
176
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177 session.close = session_close;
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178
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179 session.send = function (t)
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180 session.log("debug", "Sending[%s]: %s", session.type, t.top_tag and t:top_tag() or t:match("^[^>]*>?"));
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181 return session.rawsend(tostring(t));
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182 end
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183
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184 function session.rawsend(t)
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185 local ret, err = conn:write(t);
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186 if not ret then
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187 session.log("debug", "Error writing to connection: %s", err);
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188 return false, err;
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189 end
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190 return true;
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191 end
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diff changeset
192
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193 sessions[conn] = session;
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194 end
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diff changeset
195
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diff changeset
196 function listeners.onincoming(conn, data)
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197 local session = sessions[conn];
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198 if session then
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diff changeset
199 session.data(data);
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200 end
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diff changeset
201 end
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diff changeset
202
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diff changeset
203 function listeners.ondisconnect(conn, err)
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diff changeset
204 local session = sessions[conn];
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diff changeset
205 if session then
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diff changeset
206 session.log("info", "Admin client disconnected: %s", err or "connection closed");
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diff changeset
207 session.conn = nil;
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diff changeset
208 sessions[conn] = nil;
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diff changeset
209 end
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diff changeset
210 end
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diff changeset
211 return {
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diff changeset
212 listeners = listeners;
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diff changeset
213 };
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diff changeset
214 end
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diff changeset
215
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diff changeset
216 local function new_client()
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diff changeset
217 local client = {
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218 type = "client";
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diff changeset
219 events = events.new();
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220 log = log;
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diff changeset
221 };
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diff changeset
222
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diff changeset
223 local listeners = {};
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diff changeset
224
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diff changeset
225 function listeners.onconnect(conn)
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226 log("debug", "Connected");
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diff changeset
227 client.conn = conn;
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diff changeset
228
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diff changeset
229 local stream = new_xmpp_stream(client, stream_callbacks);
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diff changeset
230 client.stream = stream;
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diff changeset
231 client.notopen = true;
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diff changeset
232
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diff changeset
233 client.thread = runner(function (stanza)
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diff changeset
234 if st.is_stanza(stanza) then
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diff changeset
235 client.events.fire_event("received", stanza);
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diff changeset
236 elseif stanza.stream == "opened" then
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diff changeset
237 stream_callbacks._streamopened(client, stanza.attr);
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diff changeset
238 client.events.fire_event("connected");
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parents:
diff changeset
239 elseif stanza.stream == "closed" then
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diff changeset
240 client.events.fire_event("disconnected");
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parents:
diff changeset
241 stream_callbacks._streamclosed(client, stanza.attr);
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parents:
diff changeset
242 end
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diff changeset
243 end, runner_callbacks, client);
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diff changeset
244
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parents:
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245 client.close = session_close;
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246
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247 function client.send(t)
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248 client.log("debug", "Sending: %s", t.top_tag and t:top_tag() or t:match("^[^>]*>?"));
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249 return client.rawsend(tostring(t));
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250 end
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251
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252 function client.rawsend(t)
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253 local ret, err = conn:write(t);
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254 if not ret then
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255 client.log("debug", "Error writing to connection: %s", err);
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256 return false, err;
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257 end
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258 return true;
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259 end
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260 client.log("debug", "Opening stream...");
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261 client:open_stream();
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262 end
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263
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264 function listeners.onincoming(conn, data) --luacheck: ignore 212/conn
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265 local ok, err = client.stream:feed(data);
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266 if not ok then
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267 client.log("debug", "Received invalid XML (%s) %d bytes: %q", err, #data, data:sub(1, 300));
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268 client:close("not-well-formed");
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269 end
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270 end
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271
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272 function listeners.ondisconnect(conn, err) --luacheck: ignore 212/conn
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273 client.log("info", "Admin client disconnected: %s", err or "connection closed");
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274 client.conn = nil;
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275 end
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276
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277 client.listeners = listeners;
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278
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279 return client;
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280 end
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281
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282 return {
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283 server = new_server;
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284 client = new_client;
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285 };