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plugins/jingle_ibb.lua @ 500:674daff6c73b
use util.bitcompat from Prosody for bitwise compat layer
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 23 Jun 2023 12:26:43 +0200 |
parent | 490:6b2f31da9610 |
rev | line source |
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250 | 1 local verse = require "verse"; |
490
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2 local base64 = require "prosody.util.encodings".base64; |
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3 local new_id = require "prosody.util.id".short; |
250 | 4 |
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5 local xmlns_jingle_ibb = "urn:xmpp:jingle:transports:ibb:1"; |
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6 local xmlns_ibb = "http://jabber.org/protocol/ibb"; |
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7 assert(base64.encode("This is a test.") == "VGhpcyBpcyBhIHRlc3Qu", "Base64 encoding failed"); |
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8 assert(base64.decode("VGhpcyBpcyBhIHRlc3Qu") == "This is a test.", "Base64 decoding failed"); |
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9 |
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10 local ibb_conn = {}; |
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11 local ibb_conn_mt = { __index = ibb_conn }; |
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12 |
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13 local function new_ibb(stream) |
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14 local conn = setmetatable({ stream = stream }, ibb_conn_mt) |
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15 conn = verse.eventable(conn); |
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16 return conn; |
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17 end |
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18 |
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19 function ibb_conn:initiate(peer, sid, stanza) |
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20 self.block = 2048; -- ignored for now |
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21 self.stanza = stanza or 'iq'; |
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22 self.peer = peer; |
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23 self.sid = sid or tostring(self):match("%x+$"); |
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24 self.iseq = 0; |
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25 self.oseq = 0; |
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26 local feeder = function(stanza) |
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27 return self:feed(stanza) |
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28 end |
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29 self.feeder = feeder; |
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30 print("Hooking incoming IQs"); |
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31 local stream = self.stream; |
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32 stream:hook("iq/".. xmlns_ibb, feeder) |
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33 if stanza == "message" then |
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34 stream:hook("message", feeder) |
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35 end |
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36 end |
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37 |
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38 function ibb_conn:open(callback) |
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39 self.stream:send_iq(verse.iq{ to = self.peer, type = "set" } |
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40 :tag("open", { |
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41 xmlns = xmlns_ibb, |
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42 ["block-size"] = self.block, |
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43 sid = self.sid, |
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44 stanza = self.stanza |
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45 }) |
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46 , function(reply) |
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47 if callback then |
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48 if reply.attr.type ~= "error" then |
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49 callback(true) |
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50 else |
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51 callback(false, reply:get_error()) |
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52 end |
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53 end |
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54 end); |
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55 end |
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56 |
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57 function ibb_conn:send(data) |
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58 local stanza = self.stanza; |
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59 local st; |
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60 if stanza == "iq" then |
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61 st = verse.iq{ type = "set", to = self.peer } |
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62 elseif stanza == "message" then |
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63 st = verse.message{ to = self.peer } |
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64 end |
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65 |
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66 local seq = self.oseq; |
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67 self.oseq = seq + 1; |
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68 |
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69 st:tag("data", { xmlns = xmlns_ibb, sid = self.sid, seq = seq }) |
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70 :text(base64.encode(data)); |
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71 |
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72 if stanza == "iq" then |
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73 self.stream:send_iq(st, function(reply) |
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74 self:event(reply.attr.type == "result" and "drained" or "error"); |
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75 end) |
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76 else |
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77 stream:send(st) |
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78 self:event("drained"); |
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79 end |
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80 end |
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81 |
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82 function ibb_conn:feed(stanza) |
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83 if stanza.attr.from ~= self.peer then return end |
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84 local child = stanza[1]; |
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85 if child.attr.sid ~= self.sid then return end |
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86 local ok; |
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87 if child.name == "open" then |
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88 self:event("connected"); |
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89 self.stream:send(verse.reply(stanza)) |
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90 return true |
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91 elseif child.name == "data" then |
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92 local bdata = stanza:get_child_text("data", xmlns_ibb); |
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93 local seq = tonumber(child.attr.seq); |
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94 local expected_seq = self.iseq; |
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95 if bdata and seq then |
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96 if seq ~= expected_seq then |
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97 self.stream:send(verse.error_reply(stanza, "cancel", "not-acceptable", "Wrong sequence. Packet lost?")) |
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98 self:close(); |
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99 self:event("error"); |
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100 return true; |
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101 end |
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102 self.iseq = seq + 1; |
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103 local data = base64.decode(bdata); |
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104 if self.stanza == "iq" then |
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105 self.stream:send(verse.reply(stanza)) |
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106 end |
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107 self:event("incoming-raw", data); |
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108 return true; |
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109 end |
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110 elseif child.name == "close" then |
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111 self.stream:send(verse.reply(stanza)) |
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112 self:close(); |
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113 return true |
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114 end |
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115 end |
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116 |
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117 --[[ FIXME some day |
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118 function ibb_conn:receive(patt) |
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119 -- is this even used? |
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120 print("ibb_conn:receive("..tostring(patt)..")"); |
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121 assert(patt == "*a" or tonumber(patt)); |
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122 local data = t_concat(self.ibuffer):sub(self.pos, tonumber(patt) or nil); |
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123 self.pos = self.pos + #data; |
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124 return data |
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125 end |
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126 |
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127 function ibb_conn:dirty() |
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128 print("ibb_conn:dirty()"); |
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129 return false -- ???? |
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130 end |
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131 function ibb_conn:getfd() |
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132 return 0 |
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133 end |
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134 function ibb_conn:settimeout(n) |
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135 -- ignore? |
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136 end |
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137 -]] |
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138 |
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139 function ibb_conn:close() |
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140 self.stream:unhook("iq/".. xmlns_ibb, self.feeder) |
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141 self:event("disconnected"); |
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142 end |
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143 |
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144 function verse.plugins.jingle_ibb(stream) |
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145 stream:hook("ready", function () |
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146 stream:add_disco_feature(xmlns_jingle_ibb); |
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147 end, 10); |
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148 |
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149 local ibb = {}; |
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150 |
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151 function ibb:_setup() |
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152 local conn = new_ibb(self.stream); |
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153 conn.sid = self.sid or conn.sid; |
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154 conn.stanza = self.stanza or conn.stanza; |
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155 conn.block = self.block or conn.block; |
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156 conn:initiate(self.peer, self.sid, self.stanza); |
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157 self.conn = conn; |
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158 end |
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159 function ibb:generate_initiate() |
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160 print("ibb:generate_initiate() as ".. self.role); |
457
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161 local sid = new_id(); |
219
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162 self.sid = sid; |
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163 self.stanza = 'iq'; |
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164 self.block = 2048; |
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165 local transport = verse.stanza("transport", { xmlns = xmlns_jingle_ibb, |
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166 sid = self.sid, stanza = self.stanza, ["block-size"] = self.block }); |
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167 return transport; |
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168 end |
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169 function ibb:generate_accept(initiate_transport) |
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170 print("ibb:generate_accept() as ".. self.role); |
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171 local attr = initiate_transport.attr; |
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172 self.sid = attr.sid or self.sid; |
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173 self.stanza = attr.stanza or self.stanza; |
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174 self.block = attr["block-size"] or self.block; |
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175 self:_setup(); |
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176 return initiate_transport; |
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177 end |
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178 function ibb:connect(callback) |
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179 if not self.conn then |
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180 self:_setup(); |
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181 end |
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182 local conn = self.conn; |
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183 print("ibb:connect() as ".. self.role); |
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184 if self.role == "initiator" then |
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185 conn:open(function(ok, ...) |
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186 assert(ok, table.concat({...}, ", ")); |
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187 callback(conn); |
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188 end); |
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189 else |
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190 callback(conn); |
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191 end |
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192 end |
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193 function ibb:info_received(jingle_tag) |
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194 print("ibb:info_received()"); |
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195 -- TODO, what exactly? |
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196 end |
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197 function ibb:disconnect() |
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198 if self.conn then |
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199 self.conn:close() |
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200 end |
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201 end |
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202 function ibb:handle_accepted(jingle_tag) end |
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203 |
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204 local ibb_mt = { __index = ibb }; |
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205 stream:hook("jingle/transport/"..xmlns_jingle_ibb, function (jingle) |
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206 return setmetatable({ |
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207 role = jingle.role, |
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208 peer = jingle.peer, |
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209 stream = jingle.stream, |
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210 jingle = jingle, |
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211 }, ibb_mt); |
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212 end); |
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213 end |