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This is an automatically generated e-mail. To reply, visit:
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36402#file36402line231" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/include/asterisk/framehook.h</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">struct ast_framehook_interface {</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \retval On success, <span class="hl">posi</span>tive id representing this hook on the channel<span class="ew"> </span></span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \retval On success, <span class="hl">non-nega</span>tive id representing this hook on the channel<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;">There are red blobs present in this review. :)</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line1942" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)</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><span class="cs">XXX</span><span class="cm"> These buffer sizes could use more consideration. Currently</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * just numbers pulled out of thin air.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></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; "></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">struct</span> <span class="n">blind_transfer_data</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; "></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="kt">char</span> <span class="n">exten</span><span class="p">[</span><span class="n">AST_MAX_EXTENSION</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; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">1947</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">char</span> <span class="n">context</span><span class="p">[</span><span class="n">AST_MAX_CONTEXT</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; "></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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<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;">I don't see why they need more consideration since they are standard dimension defines for these values used throughout the system.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line1954" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)</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">ast_bridge_change_state</span><span class="p">(</span><span class="n">bridge_channel</span><span class="p">,</span> <span class="n">AST_BRIDGE_CHANNEL_STATE_HANGUP</span><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;">How about calling bridge_handle_hangup() here instead.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4301" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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">local</span> <span class="o">=</span> <span class="n">ast_request</span><span class="p">(</span><span class="s">"Local"</span><span class="p">,</span> <span class="n">slin_cap</span><span class="p">,</span> <span class="n">transferer</span><span class="p">,</span> <span class="n">chan_name</span><span class="p">,</span> <span class="o">&</span><span class="n">cause</span><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;">Replacing slin_cap with ast_channel_nativeformats(transferer) can eliminate the need for all of the slin_cap code.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4305" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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="k">if</span> <span class="p">(</span><span class="n">hook</span> <span class="o">&&</span> <span class="n">ast_framehook_attach</span><span class="p">(</span><span class="n">local</span><span class="p">,</span> <span class="n">hook</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</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="tb"> </span><span class="k">return</span> <span class="n">AST_BRIDGE_TRANSFER_FAIL</span><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;">Missing ast_hangup(local)</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4366" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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">queue_blind_transfer_bridge_action</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_channel</span> <span class="o">*</span><span class="n">transferee</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="tb"> </span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">exten</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">context</span><span class="p">,</span> <span class="k">struct</span> <span class="n">ast_framehook_interface</span> <span class="o">*</span><span class="n">hook</span><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;">Suggest name to match others:
bridge_channel_queue_blind_transfer()</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4388" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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="cm">/* </span><span class="cs">XXX</span><span class="cm"> Why doesn't this function return success/failure? */</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">ast_bridge_channel_queue_action_data</span><span class="p">(</span><span class="n">transferee_bridge_channel</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="tb"> </span><span class="tb"> </span><span class="n">AST_BRIDGE_ACTION_BLIND_TRANSFER</span><span class="p">,</span> <span class="o">&</span><span class="n">blind_data</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">blind_data</span><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;">Because it makes the function compatible with functions that write into the bridge and writes into a bridge are not guaranteed.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4437" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">enum</span> <span class="n">ast_transfer_result</span> <span class="nf">ast_bridge_blind_transfer</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_channel</span> <span class="o">*</span><span class="n">transferer</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="tb"> </span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">exten</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">context</span><span class="p">,</span> <span class="k">struct</span> <span class="n">ast_framehook_interface</span> <span class="o">*</span><span class="n">hook</span><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;">Any particular reason you didn't use the ast_bridge_transfer_blind() and ast_bridge_transfer_attended() names?</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4447" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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="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="tb"> </span><span class="n">SCOPED_LOCK</span><span class="p">(</span><span class="n">lock</span><span class="p">,</span> <span class="n">transferer</span><span class="p">,</span> <span class="n">ast_channel_lock</span><span class="p">,</span> <span class="n">ast_channel_unlock</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="tb"> </span><span class="n">bridge</span> <span class="o">=</span> <span class="n">ast_channel_internal_bridge</span><span class="p">(</span><span class="n">transferer</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="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">bridge</span><span class="p">)</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="tb"> </span><span class="tb"> </span><span class="k">return</span> <span class="n">AST_BRIDGE_TRANSFER_INVALID</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="tb"> </span><span class="n">ao2_ref</span><span class="p">(</span><span class="n">bridge</span><span class="p">,</span> <span class="o">+</span><span class="mi">1</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="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 code should be packaged into its own function (ast_channel_get_bridge()) in anticipation of moving it into channel_internal_api.c to replace the ast_channel_internal_bridge() call. Also a helper query function like ast_channel_is_bridged() call that uses it.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36403#file36403line4448" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/bridging.c</a>
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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="tb"> </span><span class="n">SCOPED_LOCK</span><span class="p">(</span><span class="n">lock</span><span class="p">,</span> <span class="n">transferer</span><span class="p">,</span> <span class="n">ast_channel_lock</span><span class="p">,</span> <span class="n">ast_channel_unlock</span><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;">There is SCOPED_CHANNELLOCK() available.</pre>
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<a href="https://reviewboard.asterisk.org/r/2470/diff/1/?file=36405#file36405line9398" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/bridge_construction/main/pbx.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_async_goto(struct ast_channel *chan, const char *context, const char *exten, int priority)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>if (ast_channel_pbx(chan)) { /* This channel is currently in the PBX */</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span>if (<span class="hl">ast_channel_internal_bridge(chan) || </span>ast_channel_pbx(chan)) { /* This channel is currently in the PBX */</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;">The comment is no longer correct. It also should not be a tail comment either.</pre>
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<p>- rmudgett</p>
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<p>On April 24th, 2013, 10:25 p.m. UTC, Mark Michelson wrote:</p>
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<div>Review request for Asterisk Developers, jrose and rmudgett.</div>
<div>By Mark Michelson.</div>
<p style="color: grey;"><i>Updated April 24, 2013, 10:25 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-21335">ASTERISK-21335</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 adds a new API call to bridging.h called ast_bridge_blind_transfer(). It is intended to be used by channel drivers and other entities that receive external notifications to perform a blind transfer.
The idea here is to provide the transferer channel, and the target extension and context. Given this information, all parties bridged to the transferer will be transferred to the given location. In the case where the transferer is bridged to multiple peers, the entire bridge is transferred by starting a local channel and swapping the transferer and local channel. In the case where the transferer is bridged to a single party, then that one party is redirected to the given destination.
Another parameter that the blind transfer code can be given is a framehook. This is useful for cases where the caller of ast_bridge_blind_transfer() wishes to be able to monitor the progress of the new outbound call. The framehook is attached either to the newly-created local channel (in the case of transferring multiple bridged peers) or to the existing transferee channel (in the case of transferring a single channel).
During implementation discussions, it was noticed that there were some special flags needed for bridges. One such flag always prohibits transfers from occurring on a bridge. This is useful for holding bridges, parking bridges, and other bridges where the participant is not necessarily aware that he is in a bridge. Another flag states that no matter the number of participants in the bridge, the entire bridge should be transferred rather than only transferring a single participant. This is used for bridges that are intended to always be multi-party, such as the bridge created by app_confbridge. I have applied these flags in a few places. Please let me know if there are other bridges where these flags should be applied.
Unfinished business:
* There is a large chunk of code that is commented out with regards to parking. The API that this section relies on is currently a work in progress in /team/jrose/bridge_projects/. Once that code has been merged, then the parking-relevant code can be tested.
* There are likely some small details that I have not addressed. For instance, I do not set any channel variables at all during a blind transfer. It may be desirable to set a BLINDTRANSFER or other variables on channels. Please let me know if there are items that I need to add here.
* This review is intended only to implement blind transfers, but you will notice in bridging.h an ast_bridge_attended_transfer() function and a stub for it in bridging.c. This is simply a placeholder for now, but it will be implemented soon.</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;">To test this, I created an AMI action called BlindTransfer. The action takes the transferer channel, context, and extension as an argument. With this action, I was able to test both a one-to-one blind transfer, as well as a transfer of a confbridge. They both worked. I wrote this AMI action as a way of testing this API, but I also documented it in case it is decided that this would be a useful action to have permanently.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/team/group/bridge_construction/apps/app_bridgewait.c <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/apps/app_confbridge.c <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/include/asterisk/bridging.h <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/include/asterisk/bridging_features.h <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/include/asterisk/framehook.h <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/main/bridging.c <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/main/manager.c <span style="color: grey">(386463)</span></li>
<li>/team/group/bridge_construction/main/pbx.c <span style="color: grey">(386463)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2470/diff/" style="margin-left: 3em;">View Diff</a></p>
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