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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41049#file41049line19" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/bridging_private.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">/*!</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \file</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \brief Private Bridging API</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> *</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \author Mark Michelson <mmichelson@digium.com></span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> *</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * See Also:</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \arg \ref AstCREDITS</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#ifndef _ASTERISK_PRIVATE_BRIDGING_H</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define _ASTERISK_PRIVATE_BRIDGING_H</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This file should not be in include/asterisk as it will be installed with the other headers there. This would expose symbols to modules that can't actually be linked to.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line52" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define TRANSFERER_ROLE_NAME "transferer"<span class="ew"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Red blob.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line238" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"><span class="tb"> </span> *<span class="ew"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line549" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"><span class="tb"> </span> * is currently ringing is now known as the recall target.<span class="ew"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line915" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line1113" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="ew"><span class="tb"> </span><span class="tb"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line1146" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">static</span> <span class="kt">int</span> <span class="nf">threeway_enter</span><span class="p">(</span><span class="k">struct</span> <span class="n">attended_transfer_properties</span> <span class="o">*</span><span class="n">props</span><span class="p">)</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">bridge_merge</span><span class="p">(</span><span class="n">props</span><span class="o">-></span><span class="n">transferee_bridge</span><span class="p">,</span> <span class="n">props</span><span class="o">-></span><span class="n">target_bridge</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="mi">0</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">play_sound</span><span class="p">(</span><span class="n">props</span><span class="o">-></span><span class="n">transfer_target</span><span class="p">,</span> <span class="n">props</span><span class="o">-></span><span class="n">xfersound</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1516</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">play_sound</span><span class="p">(</span><span class="n">props</span><span class="o">-></span><span class="n">transferer</span><span class="p">,</span> <span class="n">props</span><span class="o">-></span><span class="n">xfersound</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1517</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">publish_transfer_threeway</span><span class="p">(</span><span class="n">props</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1518</font></th>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1519</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">return</span> <span class="mi">0</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1520</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="p">}</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This appears to ignore any merge inhibition flags that a bridge may have. While this is acceptable for the target bridge since it was created by the attended transfer code, I'm not so sure that it will always be the case for the transferee bridge.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line1835" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1835</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="ew"><span class="tb"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2077" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2077</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">abort_dtmf</span><span class="p">,</span> <span class="n">atxfer_abort</span><span class="p">,</span> <span class="n">personality</span><span class="o">-></span><span class="n">pvt</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span><span class="ew"> </span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2082" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2082</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">complete_dtmf</span><span class="p">,</span> <span class="n">atxfer_complete</span><span class="p">,</span> <span class="n">personality</span><span class="o">-></span><span class="n">pvt</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span><span class="ew"> </span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2087" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2087</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">threeway_dtmf</span><span class="p">,</span> <span class="n">atxfer_threeway</span><span class="p">,</span> <span class="n">personality</span><span class="o">-></span><span class="n">pvt</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span><span class="ew"> </span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2092" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2092</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">swap_dtmf</span><span class="p">,</span> <span class="n">atxfer_swap</span><span class="p">,</span> <span class="n">personality</span><span class="o">-></span><span class="n">pvt</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span><span class="ew"> </span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2266" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2266</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="ew"><span class="tb"> </span><span class="tb"> </span></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41054#file41054line2722" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/bridging_basic.c</a>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">2721</font></th>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Idem.</pre>
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<a href="https://reviewboard.asterisk.org/r/2654/diff/1/?file=41058#file41058line338" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/stasis_bridging.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">ASTERISK_FILE_VERSION(__FILE__, "$Revision$")</pre></td>
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<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">338</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The surviving transferer channel when a transfer results in a threeway call</para></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Is this a uniqueid or a channel name?</pre>
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<p>- opticron</p>
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<p>On July 2nd, 2013, 5:11 p.m. CDT, Mark Michelson wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Mark Michelson.</div>
<p style="color: grey;"><i>Updated July 2, 2013, 5:11 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-21543">ASTERISK-21543</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This review contains the content necessary to get DTMF attended transfer feature complete.
In order to facilitate this, there are some background tasks that needed to be done first. First, when an attended transfer is initiated, it was clear that the bridge that the parties were in would need to behave differently from how it normally did. In order to allow for this to happen, the concept of bridge "personalities" was added. When a bridge is being used in an attended transfer, it has its personality changed to be that of an attended transfer basic bridge instead of a normal basic bridge. With this personality, the following changes are present:
* The bridge will never dissolve on its own. It must be destroyed by an outside influence.
* The bridge recognizes when a channel with the "transferer" role enters. This channel is bestowed with DTMF hooks and a hangup hook that other channels do not get.
* The normal DTMF hooks are not present for channels. This makes compounding transfers impossible.
In order to make use of an alternate personality for basic bridging, attended transfer functionality was moved from bridges/bridge_builtin_features.c to main/bridging_basic.c. While performing this move, it became clear that it made sense to move blind transfer functionality as well since attended and blind transfers share some common code.
Attended transfer operation has been completely overhauled from its old form. In its old form, the attended transfer DTMF hook would not return until a conclusive result of the transfer could be determined. With this set of changes, the attended transfer DTMF hook sets up an attended_transfer_properties structure that has all the relevant pieces of information for the attended transfer. After setting up the properties, the feature hook launches a monitoring thread and returns.
This monitor thread then runs a state machine that responds to stimuli from various hooks and callbacks. The state machine allows for orderly operation since stimuli may be coming from multiple other threads.
In addition to the normal feedback for reviews (i.e. memory leaks, potential deadlocks, etc.), let me know if you have alternate suggestions for names of things. I struggled to come up with cogent state names for the state machine, so if you have better suggestions for the names, please let me know.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Using the state machine as a guide, I ran through every transition that can be reliably tested (for instance, I couldn't easily test transfer failures that rely on memory allocation failures). In all cases, I got the result I expected.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/main/features.c <span style="color: grey">(393507)</span></li>
<li>/trunk/main/bridging_roles.c <span style="color: grey">(393507)</span></li>
<li>/trunk/main/bridging_basic.c <span style="color: grey">(393507)</span></li>
<li>/trunk/main/bridging.c <span style="color: grey">(393507)</span></li>
<li>/trunk/include/asterisk/stasis_bridging.h <span style="color: grey">(393507)</span></li>
<li>/trunk/include/asterisk/features_config.h <span style="color: grey">(393507)</span></li>
<li>/trunk/include/asterisk/bridging_roles.h <span style="color: grey">(393507)</span></li>
<li>/trunk/include/asterisk/bridging_private.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/include/asterisk/bridging_features.h <span style="color: grey">(393507)</span></li>
<li>/trunk/include/asterisk/bridging.h <span style="color: grey">(393507)</span></li>
<li>/trunk/bridges/bridge_builtin_features.c <span style="color: grey">(393507)</span></li>
<li>/trunk/main/features_config.c <span style="color: grey">(393507)</span></li>
<li>/trunk/main/stasis_bridging.c <span style="color: grey">(393507)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2654/diff/" style="margin-left: 3em;">View Diff</a></p>
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