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plugins/jingle.lua @ 269:a15ede6b9ca1
doc/example_pep.lua: Reorder a bit to avoid re-sending presence multiple times when caps change.
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 16 Dec 2011 22:09:37 +0100 |
parent | 250:a5ac643a7fd6 |
child | 341:a95890d86fe4 |
rev | line source |
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250 | 1 local verse = require "verse"; |
100
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2 local sha1 = require "util.sha1".sha1; |
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3 local timer = require "util.timer"; |
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4 local uuid_generate = require "util.uuid".generate; |
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5 |
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6 local xmlns_jingle = "urn:xmpp:jingle:1"; |
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7 local xmlns_jingle_errors = "urn:xmpp:jingle:errors:1"; |
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8 |
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9 local jingle_mt = {}; |
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10 jingle_mt.__index = jingle_mt; |
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11 |
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12 local registered_transports = {}; |
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13 local registered_content_types = {}; |
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14 |
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15 function verse.plugins.jingle(stream) |
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16 stream:hook("ready", function () |
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17 stream:add_disco_feature(xmlns_jingle); |
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18 end, 10); |
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19 |
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20 function stream:jingle(to) |
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21 return verse.eventable(setmetatable(base or { |
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22 role = "initiator"; |
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23 peer = to; |
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24 sid = uuid_generate(); |
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25 stream = stream; |
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26 }, jingle_mt)); |
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27 end |
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28 |
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29 function stream:register_jingle_transport(transport) |
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30 -- transport is a function that receives a |
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31 -- <transport> element, and returns a connection |
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32 -- We wait for 'connected' on that connection, |
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33 -- and use :send() and 'incoming-raw'. |
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34 end |
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35 |
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36 function stream:register_jingle_content_type(content) |
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37 -- Call content() for every 'incoming-raw'? |
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38 -- I think content() returns the object we return |
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39 -- on jingle:accept() |
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40 end |
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41 |
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42 local function handle_incoming_jingle(stanza) |
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43 local jingle_tag = stanza:get_child("jingle", xmlns_jingle); |
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44 local sid = jingle_tag.attr.sid; |
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45 local action = jingle_tag.attr.action; |
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46 local result = stream:event("jingle/"..sid, stanza); |
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47 if result == true then |
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48 -- Ack |
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49 stream:send(verse.reply(stanza)); |
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50 return true; |
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51 end |
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52 -- No existing Jingle object handled this action, our turn... |
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53 if action ~= "session-initiate" then |
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54 -- Trying to send a command to a session we don't know |
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55 local reply = verse.error_reply(stanza, "cancel", "item-not-found") |
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56 :tag("unknown-session", { xmlns = xmlns_jingle_errors }):up(); |
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57 stream:send(reply); |
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58 return; |
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59 end |
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60 |
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61 -- Ok, session-initiate, new session |
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62 |
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63 -- Create new Jingle object |
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64 local sid = jingle_tag.attr.sid; |
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65 |
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66 local jingle = verse.eventable{ |
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67 role = "receiver"; |
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68 peer = stanza.attr.from; |
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69 sid = sid; |
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70 stream = stream; |
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71 }; |
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72 |
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73 setmetatable(jingle, jingle_mt); |
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74 |
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75 local content_tag; |
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76 local content, transport; |
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77 for tag in jingle_tag:childtags() do |
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78 if tag.name == "content" and tag.attr.xmlns == xmlns_jingle then |
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79 local description_tag = tag:child_with_name("description"); |
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80 local description_xmlns = description_tag.attr.xmlns; |
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81 if description_xmlns then |
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82 local desc_handler = stream:event("jingle/content/"..description_xmlns, jingle, description_tag); |
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83 if desc_handler then |
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84 content = desc_handler; |
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85 end |
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86 end |
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87 |
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88 local transport_tag = tag:child_with_name("transport"); |
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89 local transport_xmlns = transport_tag.attr.xmlns; |
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90 |
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91 transport = stream:event("jingle/transport/"..transport_xmlns, jingle, transport_tag); |
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92 if content and transport then |
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93 content_tag = tag; |
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94 break; |
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95 end |
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96 end |
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97 end |
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98 if not content then |
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99 -- FIXME: Fail, no content |
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100 stream:send(verse.error_reply(stanza, "cancel", "feature-not-implemented", "The specified content is not supported")); |
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101 return true; |
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102 end |
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103 |
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104 if not transport then |
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105 -- FIXME: Refuse session, no transport |
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106 stream:send(verse.error_reply(stanza, "cancel", "feature-not-implemented", "The specified transport is not supported")); |
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107 return true; |
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108 end |
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109 |
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110 stream:send(verse.reply(stanza)); |
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111 |
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112 jingle.content_tag = content_tag; |
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113 jingle.creator, jingle.name = content_tag.attr.creator, content_tag.attr.name; |
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114 jingle.content, jingle.transport = content, transport; |
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115 |
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116 function jingle:decline() |
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117 -- FIXME: Decline session |
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118 end |
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119 |
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120 stream:hook("jingle/"..sid, function (stanza) |
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121 if stanza.attr.from ~= jingle.peer then |
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122 return false; |
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123 end |
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124 local jingle_tag = stanza:get_child("jingle", xmlns_jingle); |
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125 return jingle:handle_command(jingle_tag); |
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126 end); |
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127 |
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128 stream:event("jingle", jingle); |
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129 return true; |
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130 end |
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131 |
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132 function jingle_mt:handle_command(jingle_tag) |
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133 local action = jingle_tag.attr.action; |
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134 stream:debug("Handling Jingle command: %s", action); |
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135 if action == "session-terminate" then |
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136 self:destroy(); |
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137 elseif action == "session-accept" then |
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138 -- Yay! |
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139 self:handle_accepted(jingle_tag); |
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140 elseif action == "transport-info" then |
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141 stream:debug("Handling transport-info"); |
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142 self.transport:info_received(jingle_tag); |
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143 elseif action == "transport-replace" then |
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144 -- FIXME: Used for IBB fallback |
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145 stream:error("Peer wanted to swap transport, not implemented"); |
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146 else |
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147 -- FIXME: Reply unhandled command |
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148 stream:warn("Unhandled Jingle command: %s", action); |
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149 return nil; |
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150 end |
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151 return true; |
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152 end |
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153 |
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154 function jingle_mt:send_command(command, element, callback) |
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155 local stanza = verse.iq({ to = self.peer, type = "set" }) |
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156 :tag("jingle", { |
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157 xmlns = xmlns_jingle, |
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158 sid = self.sid, |
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159 action = command, |
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160 initiator = self.role == "initiator" and self.stream.jid or nil, |
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161 responder = self.role == "responder" and self.jid or nil, |
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162 }):add_child(element); |
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163 if not callback then |
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164 self.stream:send(stanza); |
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165 else |
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166 self.stream:send_iq(stanza, callback); |
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167 end |
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168 end |
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169 |
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170 function jingle_mt:accept(options) |
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171 local accept_stanza = verse.iq({ to = self.peer, type = "set" }) |
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172 :tag("jingle", { |
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173 xmlns = xmlns_jingle, |
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174 sid = self.sid, |
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175 action = "session-accept", |
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176 responder = stream.jid, |
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177 }) |
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178 :tag("content", { creator = self.creator, name = self.name }); |
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179 |
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180 local content_accept_tag = self.content:generate_accept(self.content_tag:child_with_name("description"), options); |
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181 accept_stanza:add_child(content_accept_tag); |
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182 |
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183 local transport_accept_tag = self.transport:generate_accept(self.content_tag:child_with_name("transport"), options); |
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184 accept_stanza:add_child(transport_accept_tag); |
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185 |
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186 local jingle = self; |
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187 stream:send_iq(accept_stanza, function (result) |
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188 if result.attr.type == "error" then |
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189 local type, condition, text = result:get_error(); |
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190 stream:error("session-accept rejected: %s", condition); -- FIXME: Notify |
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191 return false; |
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192 end |
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193 jingle.transport:connect(function (conn) |
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194 stream:warn("CONNECTED (receiver)!!!"); |
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195 jingle.state = "active"; |
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196 jingle:event("connected", conn); |
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197 end); |
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198 end); |
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199 end |
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200 |
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201 |
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202 stream:hook("iq/"..xmlns_jingle, handle_incoming_jingle); |
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203 return true; |
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204 end |
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205 |
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206 function jingle_mt:offer(name, content) |
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207 local session_initiate = verse.iq({ to = self.peer, type = "set" }) |
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208 :tag("jingle", { xmlns = xmlns_jingle, action = "session-initiate", |
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209 initiator = self.stream.jid, sid = self.sid }); |
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210 |
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211 -- Content tag |
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212 session_initiate:tag("content", { creator = self.role, name = name }); |
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213 |
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214 -- Need description element from someone who can turn 'content' into XML |
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215 local description = self.stream:event("jingle/describe/"..name, content); |
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216 |
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217 if not description then |
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218 return false, "Unknown content type"; |
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219 end |
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220 |
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221 session_initiate:add_child(description); |
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222 |
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223 -- FIXME: Sort transports by 1) recipient caps 2) priority (SOCKS vs IBB, etc.) |
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224 -- Fixed to s5b in the meantime |
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225 local transport = self.stream:event("jingle/transport/".."urn:xmpp:jingle:transports:s5b:1", self); |
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226 self.transport = transport; |
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227 |
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228 session_initiate:add_child(transport:generate_initiate()); |
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229 |
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230 self.stream:debug("Hooking %s", "jingle/"..self.sid); |
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231 self.stream:hook("jingle/"..self.sid, function (stanza) |
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232 if stanza.attr.from ~= self.peer then |
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233 return false; |
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234 end |
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235 local jingle_tag = stanza:get_child("jingle", xmlns_jingle); |
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236 return self:handle_command(jingle_tag) |
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237 end); |
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238 |
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239 self.stream:send_iq(session_initiate, function (result) |
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240 if result.type == "error" then |
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241 self.state = "terminated"; |
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242 local type, condition, text = result:get_error(); |
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243 return self:event("error", { type = type, condition = condition, text = text }); |
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244 end |
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245 end); |
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246 self.state = "pending"; |
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247 end |
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248 |
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249 function jingle_mt:terminate(reason) |
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250 local reason_tag = verse.stanza("reason"):tag(reason or "success"); |
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251 self:send_command("session-terminate", reason_tag, function (result) |
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252 self.state = "terminated"; |
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253 self.transport:disconnect(); |
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254 self:destroy(); |
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255 end); |
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256 end |
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257 |
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258 function jingle_mt:destroy() |
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259 self:event("terminated"); |
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260 self.stream:unhook("jingle/"..self.sid, self.handle_command); |
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261 end |
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262 |
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263 function jingle_mt:handle_accepted(jingle_tag) |
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264 local transport_tag = jingle_tag:child_with_name("transport"); |
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265 self.transport:handle_accepted(transport_tag); |
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266 self.transport:connect(function (conn) |
211 | 267 self.stream:debug("CONNECTED (initiator)!") |
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268 -- Connected, send file |
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269 self.state = "active"; |
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270 self:event("connected", conn); |
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271 end); |
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272 end |
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273 |
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274 function jingle_mt:set_source(source, auto_close) |
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275 local function pump() |
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276 local chunk, err = source(); |
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277 if chunk and chunk ~= "" then |
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278 self.transport.conn:send(chunk); |
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279 elseif chunk == "" then |
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280 return pump(); -- We need some data! |
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281 elseif chunk == nil then |
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282 if auto_close then |
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283 self:terminate(); |
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284 end |
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285 self.transport.conn:unhook("drained", pump); |
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286 source = nil; |
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287 end |
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288 end |
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289 self.transport.conn:hook("drained", pump); |
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290 pump(); |
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291 end |
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292 |
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293 function jingle_mt:set_sink(sink) |
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294 self.transport.conn:hook("incoming-raw", sink); |
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295 self.transport.conn:hook("disconnected", function (event) |
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296 self.stream:debug("Closing sink..."); |
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297 local reason = event.reason; |
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298 if reason == "closed" then reason = nil; end |
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299 sink(nil, reason); |
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300 end); |
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301 end |