Mercurial > prosody-modules

annotate mod_component_client/mod_component_client.lua @ 5160:8474a3b80200

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mod_firewall: Fix 'is_admin' internal dependency rule #1797 (thanks diane) Looks like the boolean logic was inverted here. Instead, for now, simply check if is_admin is there. It is deprecated in trunk and was briefly removed before being brought back with a 'deprecated' warning as part of the new roles and permissions work. Making this dependency conditioned on the existence of the underlying function should make it work until it actually goes away for real.
author Kim Alvefur <zash@zash.se>
date Fri, 27 Jan 2023 23:06:25 +0100
parents 3e00cd4a02bc
children
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1 --[[
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2
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3 mod_component_client.lua
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5 This module turns Prosody hosts into components of other XMPP servers.
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6
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7 Config:
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8
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9 VirtualHost "component.example.com"
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10 component_client = {
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11 host = "localhost";
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12 port = 5347;
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13 secret = "hunter2";
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14 }
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17 ]]
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20 local socket = require "socket"
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22 local logger = require "util.logger";
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23 local sha1 = require "util.hashes".sha1;
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24 local st = require "util.stanza";
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26 local jid_split = require "util.jid".split;
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27 local new_xmpp_stream = require "util.xmppstream".new;
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28 local uuid_gen = require "util.uuid".generate;
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30 local core_process_stanza = prosody.core_process_stanza;
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31 local hosts = prosody.hosts;
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33 local log = module._log;
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35 local config = module:get_option("component_client", {});
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36 local server_host = config.host or "localhost";
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37 local server_port = config.port or 5347;
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38 local server_secret = config.secret or error("client_component.secret not provided");
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39 local exit_on_disconnect = config.exit_on_disconnect;
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40 local keepalive_interval = config.keepalive_interval or 3600;
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42 local __conn;
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44 local listener = {};
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45 local session;
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46
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47 local xmlns_component = 'jabber:component:accept';
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48 local stream_callbacks = { default_ns = xmlns_component };
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49
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50 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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51
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52 function stream_callbacks.error(session, error, data, data2)
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53 if session.destroyed then return; end
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54 module:log("warn", "Error processing component stream: %s", tostring(error));
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55 if error == "no-stream" then
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56 session:close("invalid-namespace");
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57 elseif error == "parse-error" then
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58 session.log("warn", "External component %s XML parse error: %s", tostring(session.host), tostring(data));
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59 session:close("not-well-formed");
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60 elseif error == "stream-error" then
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61 local condition, text = "undefined-condition";
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62 for child in data:children() do
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63 if child.attr.xmlns == xmlns_xmpp_streams then
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64 if child.name ~= "text" then
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65 condition = child.name;
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66 else
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67 text = child:get_text();
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68 end
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69 if condition ~= "undefined-condition" and text then
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70 break;
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71 end
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72 end
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73 end
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74 text = condition .. (text and (" ("..text..")") or "");
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75 session.log("info", "Session closed by remote with error: %s", text);
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76 session:close(nil, text);
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77 end
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78 end
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79
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80 function stream_callbacks.streamopened(session, attr)
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81 -- TODO check id~=nil, from==module.host
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82 module:log("debug", "Sending handshake");
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83 local handshake = st.stanza("handshake"):text(sha1(attr.id..server_secret, true));
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84 session.send(handshake);
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85 session.notopen = nil;
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86 end
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87
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88 function stream_callbacks.streamclosed(session)
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89 session.log("debug", "Received </stream:stream>");
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90 session:close();
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91 end
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92
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93 module:hook("stanza/jabber:component:accept:handshake", function(event)
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94 session.type = "component";
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95 module:log("debug", "Handshake complete");
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96 module:fire_event("component_client/connected", {});
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97 return true; -- READY!
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98 end);
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99
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100 module:hook("route/remote", function(event)
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101 return session and session.send(event.stanza);
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102 end);
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103
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104 function stream_callbacks.handlestanza(session, stanza)
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105 -- Namespaces are icky.
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106 if not stanza.attr.xmlns and stanza.name == "handshake" then
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107 stanza.attr.xmlns = xmlns_component;
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108 end
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109 if not stanza.attr.xmlns or stanza.attr.xmlns == "jabber:client" then
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110 if not stanza.attr.from then
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111 session.log("warn", "Rejecting stanza with no 'from' address");
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112 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST get a 'from' address on stanzas"));
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113 return;
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114 end
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115 local _, domain = jid_split(stanza.attr.to);
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116 if not domain then
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117 session.log("warn", "Rejecting stanza with no 'to' address");
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118 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST get a 'to' address on stanzas"));
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119 return;
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120 elseif domain ~= session.host then
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121 session.log("warn", "Component received stanza with unknown 'to' address");
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122 session.send(st.error_reply(stanza, "cancel", "not-allowed", "Component doesn't serve this JID"));
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123 return;
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124 end
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125 end
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126 return core_process_stanza(session, stanza);
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127 end
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128
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129 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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130 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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131 local function session_close(session, reason)
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132 if session.destroyed then return; end
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133 if session.conn then
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134 if session.notopen then
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135 session.send("<?xml version='1.0'?>");
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136 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
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137 end
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138 if reason then
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139 if type(reason) == "string" then -- assume stream error
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140 module:log("info", "Disconnecting component, <stream:error> is: %s", reason);
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141 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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142 elseif type(reason) == "table" then
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143 if reason.condition then
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144 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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145 if reason.text then
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146 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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147 end
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148 if reason.extra then
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149 stanza:add_child(reason.extra);
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150 end
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151 module:log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
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152 session.send(stanza);
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153 elseif reason.name then -- a stanza
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154 module:log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
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155 session.send(reason);
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156 end
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157 end
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parents:
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158 end
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parents:
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159 session.send("</stream:stream>");
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parents:
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160 session.conn:close();
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parents:
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161 listener.ondisconnect(session.conn, "stream error");
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parents:
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162 end
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Waqas Hussain <waqas20@gmail.com>
parents:
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163 end
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164
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parents:
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165 function listener.onconnect(conn)
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166 session = { type = "component_unauthed", conn = conn, send = function (data) return conn:write(tostring(data)); end, host = module.host };
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167
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parents:
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168 -- Logging functions --
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169 local conn_name = "jcp"..tostring(session):match("[a-f0-9]+$");
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170 session.log = logger.init(conn_name);
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parents:
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171 session.close = session_close;
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172
993
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parents:
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173 session.log("info", "Outgoing Jabber component connection");
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174
993
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parents:
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175 local stream = new_xmpp_stream(session, stream_callbacks);
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parents:
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176 session.stream = stream;
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177
993
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parents:
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178 function session.data(conn, data)
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parents:
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179 local ok, err = stream:feed(data);
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180 if ok then return; end
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parents:
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181 module:log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
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parents:
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182 session:close("not-well-formed");
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parents:
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183 end
1343
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parents: 1222
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184
993
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parents:
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185 session.dispatch_stanza = stream_callbacks.handlestanza;
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186
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187 session.notopen = true;
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parents:
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188 session.send(st.stanza("stream:stream", {
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parents:
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189 to = session.host;
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parents:
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190 ["xmlns:stream"] = 'http://etherx.jabber.org/streams';
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parents:
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191 xmlns = xmlns_component;
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parents:
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192 }):top_tag());
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parents:
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193
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194 --sessions[conn] = session;
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parents:
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195 end
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parents:
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196 function listener.onincoming(conn, data)
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parents:
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197 --local session = sessions[conn];
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parents:
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198 session.data(conn, data);
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parents:
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199 end
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Waqas Hussain <waqas20@gmail.com>
parents:
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200 function listener.ondisconnect(conn, err)
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parents:
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201 --local session = sessions[conn];
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parents:
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202 if session then
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parents:
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203 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
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parents:
diff changeset
204 if session.on_destroy then session:on_destroy(err); end
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parents:
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205 --sessions[conn] = nil;
8b14cdfe0213 mod_component_client: Initial commit. Allows Prosody to act as an external component for other XMPP servers.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
206 for k in pairs(session) do
8b14cdfe0213 mod_component_client: Initial commit. Allows Prosody to act as an external component for other XMPP servers.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
207 if k ~= "log" and k ~= "close" then
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parents:
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208 session[k] = nil;
8b14cdfe0213 mod_component_client: Initial commit. Allows Prosody to act as an external component for other XMPP servers.
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parents:
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209 end
8b14cdfe0213 mod_component_client: Initial commit. Allows Prosody to act as an external component for other XMPP servers.
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parents:
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210 end
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parents:
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211 session.destroyed = true;
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parents:
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212 session = nil;
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parents:
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213 end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 __conn = nil;
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parents:
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215 module:log("error", "connection lost");
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parents: 993
diff changeset
216 module:fire_event("component_client/disconnected", { reason = err });
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Waqas Hussain <waqas20@gmail.com>
parents: 1218
diff changeset
217 if exit_on_disconnect and not prosody.shutdown_reason then
2029
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daurnimator <quae@daurnimator.com>
parents: 1343
diff changeset
218 prosody.shutdown("Shutdown by component_client disconnect", 1);
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parents: 1208
diff changeset
219 end
993
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220 end
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221
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222 -- send whitespace keep-alive one an hour
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223 if keepalive_interval ~= 0 then
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224 module:add_timer(keepalive_interval, function()
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225 if __conn then
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226 __conn:write(" ");
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227 end
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228 return keepalive_interval;
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229 end);
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230 end
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231
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232 function connect()
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233 ------------------------
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234 -- Taken from net.http
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235 local conn = socket.tcp ( )
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236 conn:settimeout ( 10 )
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237 local ok, err = conn:connect ( server_host , server_port )
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238 if not ok and err ~= "timeout" then
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239 return nil, err;
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240 end
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241
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242 local handler , conn = server.wrapclient ( conn , server_host , server_port , listener , "*a")
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243 __conn = handler;
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244 ------------------------
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245 return true;
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246 end
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247 local s, err = connect();
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248 if not s then
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249 listener.ondisconnect(nil, err);
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250 end
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251
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252 module:hook_global("server-stopping", function(event)
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253 local reason = event.reason;
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254 if session then
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255 session:close{ condition = "system-shutdown", text = reason };
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256 end
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257 end, 1000);
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258