prosody
db27a4c18b6a
plugins/mod_c2s.lua

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plugins/mod_c2s.lua @ 4543:db27a4c18b6a

mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
author Matthew Wild <mwild1@gmail.com>
date Sun, 22 Jan 2012 23:57:13 +0000
child 4548:e6e5c76ff009
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4543
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 module:set_global();
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10
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11 local new_xmpp_stream = require "util.xmppstream".new;
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12 local nameprep = require "util.encodings".stringprep.nameprep;
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13 local portmanager = require "core.portmanager";
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14 local sessionmanager = require "core.sessionmanager";
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15 local st = require "util.stanza";
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16 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
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17 local uuid_generate = require "util.uuid".generate;
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18
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19 local xpcall, tostring, type = xpcall, tostring, type;
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20 local format = string.format;
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21 local traceback = debug.traceback;
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23 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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25 local log = module._log;
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27 local opt_keepalives = module:get_option_boolean("tcp_keepalives", false);
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28
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29 local sessions = module:shared("sessions");
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30
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31 local stream_callbacks = { default_ns = "jabber:client", handlestanza = core_process_stanza };
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32 local listener = { default_port = 5222, default_mode = "*a" };
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33
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34 --- Stream events handlers
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35 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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36 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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37
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38 function stream_callbacks.streamopened(session, attr)
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39 local send = session.send;
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40 session.host = attr.to;
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41 if not session.host then
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42 session:close{ condition = "improper-addressing",
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43 text = "A 'to' attribute is required on stream headers" };
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44 return;
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45 end
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46 session.host = nameprep(session.host);
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47 session.version = tonumber(attr.version) or 0;
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48 session.streamid = uuid_generate();
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49 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
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50
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51 if not hosts[session.host] then
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52 -- We don't serve this host...
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53 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
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54 return;
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55 end
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56
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57 send("<?xml version='1.0'?>");
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58 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0' xml:lang='en'>", session.streamid, session.host));
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59
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60 (session.log or log)("debug", "Sent reply <stream:stream> to client");
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61 session.notopen = nil;
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62
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63 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
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64 -- since we now have a new stream header, session is secured
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65 if session.secure == false then
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66 session.secure = true;
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67 end
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68
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69 local features = st.stanza("stream:features");
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70 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
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71 module:fire_event("stream-features", session, features);
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72
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73 send(features);
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74 end
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75
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76 function stream_callbacks.streamclosed(session)
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77 session.log("debug", "Received </stream:stream>");
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78 session:close();
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79 end
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80
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81 function stream_callbacks.error(session, error, data)
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82 if error == "no-stream" then
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83 session.log("debug", "Invalid opening stream header");
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84 session:close("invalid-namespace");
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85 elseif error == "parse-error" then
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86 (session.log or log)("debug", "Client XML parse error: %s", tostring(data));
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87 session:close("not-well-formed");
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88 elseif error == "stream-error" then
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89 local condition, text = "undefined-condition";
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90 for child in data:children() do
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91 if child.attr.xmlns == xmlns_xmpp_streams then
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92 if child.name ~= "text" then
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93 condition = child.name;
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94 else
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95 text = child:get_text();
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96 end
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97 if condition ~= "undefined-condition" and text then
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98 break;
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99 end
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100 end
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101 end
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102 text = condition .. (text and (" ("..text..")") or "");
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103 session.log("info", "Session closed by remote with error: %s", text);
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104 session:close(nil, text);
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105 end
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106 end
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Matthew Wild <mwild1@gmail.com>
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diff changeset
107
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diff changeset
108 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), traceback()); end
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diff changeset
109 function stream_callbacks.handlestanza(session, stanza)
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110 stanza = session.filter("stanzas/in", stanza);
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diff changeset
111 if stanza then
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112 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
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113 end
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diff changeset
114 end
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115
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116 --- Session methods
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117 local function session_close(session, reason)
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118 local log = session.log or log;
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119 if session.conn then
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120 if session.notopen then
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121 session.send("<?xml version='1.0'?>");
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122 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
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123 end
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diff changeset
124 if reason then
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125 if type(reason) == "string" then -- assume stream error
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126 log("info", "Disconnecting client, <stream:error> is: %s", reason);
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127 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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128 elseif type(reason) == "table" then
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129 if reason.condition then
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130 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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131 if reason.text then
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132 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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133 end
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134 if reason.extra then
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135 stanza:add_child(reason.extra);
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136 end
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137 log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
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138 session.send(stanza);
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139 elseif reason.name then -- a stanza
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140 log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
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diff changeset
141 session.send(reason);
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142 end
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143 end
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144 end
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145 session.send("</stream:stream>");
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146 session.conn:close();
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147 listener.ondisconnect(session.conn, (reason and (reason.text or reason.condition)) or reason or "session closed");
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diff changeset
148 end
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149 end
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150
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151 --- Port listener
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152 function listener.onconnect(conn)
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153 local session = sm_new_session(conn);
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diff changeset
154 sessions[conn] = session;
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155
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diff changeset
156 session.log("info", "Client connected");
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diff changeset
157
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diff changeset
158 -- Client is using legacy SSL (otherwise mod_tls sets this flag)
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parents:
diff changeset
159 if conn:ssl() then
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parents:
diff changeset
160 session.secure = true;
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parents:
diff changeset
161 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162
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parents:
diff changeset
163 if opt_keepalives then
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
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parents:
diff changeset
164 conn:setoption("keepalive", opt_keepalives);
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
165 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
166
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parents:
diff changeset
167 session.close = session_close;
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parents:
diff changeset
168
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parents:
diff changeset
169 local stream = new_xmpp_stream(session, stream_callbacks);
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
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diff changeset
170 session.stream = stream;
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diff changeset
171 session.notopen = true;
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parents:
diff changeset
172
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diff changeset
173 function session.reset_stream()
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parents:
diff changeset
174 session.notopen = true;
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parents:
diff changeset
175 session.stream:reset();
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parents:
diff changeset
176 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
177
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diff changeset
178 local filter = session.filter;
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diff changeset
179 function session.data(data)
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diff changeset
180 data = filter("bytes/in", data);
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parents:
diff changeset
181 if data then
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parents:
diff changeset
182 local ok, err = stream:feed(data);
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
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parents:
diff changeset
183 if ok then return; end
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
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parents:
diff changeset
184 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:
diff changeset
185 session:close("not-well-formed");
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
186 end
db27a4c18b6a mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
187 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
188
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parents:
diff changeset
189 session.dispatch_stanza = stream_callbacks.handlestanza;
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parents:
diff changeset
190 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191
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diff changeset
192 function listener.onincoming(conn, data)
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diff changeset
193 local session = sessions[conn];
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diff changeset
194 if session then
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parents:
diff changeset
195 session.data(data);
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parents:
diff changeset
196 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
197 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
198
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diff changeset
199 function listener.ondisconnect(conn, err)
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200 local session = sessions[conn];
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201 if session then
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202 (session.log or log)("info", "Client disconnected: %s", err);
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203 sm_destroy_session(session, err);
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204 sessions[conn] = nil;
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205 session = nil;
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206 end
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207 end
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208
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209 function listener.associate_session(conn, session)
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210 sessions[conn] = session;
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211 end
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212
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213 portmanager.register_service("c2s", {
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214 listener = listener;
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215 default_port = 5222;
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216 encryption = "starttls";
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217 });
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218
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219 portmanager.register_service("legacy_ssl", {
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220 listener = listener;
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221 encryption = "ssl";
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222 });
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223
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224