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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I have a general thread-safety concern with this addition. In general, the ast_sip_session, pjsip_dialog, and pjsip_inv_session structures are only accessed from SIP servant threads. With this set of changes, you access session data from whichever thread is executing the CHANNEL() function. To ensure thread safety, I recommend pushing the entirety of the processing into the session's serializer using ast_sip_push_task_synchronous().</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line316" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.c</a>
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(Diff revision 1)
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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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><enum name="target_uri"></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The request URI of the inbound <literal>INVITE</literal> request</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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>that created this channel.</para></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span></enum></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><enum name="local_uri"></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The URI in the <literal>To</literal> header received in the</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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>inbound <literal>INVITE</literal> request.</para></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><enum name="remote_uri"></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The URI in the <literal>From</literal> header received in the</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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>inbound <literal>INVITE</literal> request.</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;">These descriptions are inaccurate when used on outgoing channels.</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line338" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.c</a>
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(Diff revision 1)
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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="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The full IP address and port number that the <literal>INVITE</literal></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>request was received on.</para></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span></enum></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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><para>The full IP address and port number that transmitted the</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 class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><literal>INVITE</literal> request that created this channel.</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;">These descriptions are inaccurate when used on outbound channels.</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line389" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.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">struct</span> <span class="n">ast_sip_channel_pvt</span> <span class="o">*</span><span class="n">channel</span> <span class="o">=</span> <span class="n">ast_channel_tech_pvt</span><span class="p">(</span><span class="n">chan</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="k">struct</span> <span class="n">chan_pjsip_pvt</span> <span class="o">*</span><span class="n">pvt</span> <span class="o">=</span> <span class="n">channel</span><span class="o">-></span><span class="n">pvt</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;">In channel_read_pjsip(), you check that the tech_pvt (called "channel" here) is non-NULL before proceeding. You should perform the same check here before assigning the value of pvt to channel->pvt.
This change should be made in both channel_read_rtp() and channel_read_rtcp()</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line414" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.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">ast_log</span><span class="p">(</span><span class="n">AST_LOG_WARNING</span><span class="p">,</span> <span class="s">"Channel %s has no media/RTP session</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">ast_channel_name</span><span class="p">(</span><span class="n">chan</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 warning should be refined to indicate that there is no RTP session for the type of media specified.
ast_log(AST_LOG_WARNING, "Channel %s has no '%s' RTP session", ast_channel_name(chan), S_OR(field, "audio"));
The same critique applies to a similar log message in channel_read_rtcp()</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line420" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.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">420</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="n">snprintf</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">buflen</span><span class="p">,</span> <span class="s">"%s"</span><span class="p">,</span> <span class="n">ast_sockaddr_stringify</span><span class="p">(</span><span class="o">&</span><span class="n">addr</span><span class="p">));</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">421</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">type</span><span class="p">,</span> <span class="s">"dest"</span><span class="p">))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">422</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="n">ast_rtp_instance_get_remote_address</span><span class="p">(</span><span class="n">media</span><span class="o">-></span><span class="n">rtp</span><span class="p">,</span> <span class="o">&</span><span class="n">addr</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">423</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="n">snprintf</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">buflen</span><span class="p">,</span> <span class="s">"%s"</span><span class="p">,</span> <span class="n">ast_sockaddr_stringify</span><span class="p">(</span><span class="o">&</span><span class="n">addr</span><span class="p">));</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">424</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">type</span><span class="p">,</span> <span class="s">"direct"</span><span class="p">))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">425</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="n">snprintf</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">buflen</span><span class="p">,</span> <span class="s">"%s"</span><span class="p">,</span> <span class="n">ast_sockaddr_stringify</span><span class="p">(</span><span class="o">&</span><span class="n">media</span><span class="o">-></span><span class="n">direct_media_addr</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;">All of these snprintfs should just be ast_copy_string()</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line570" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.c</a>
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(Diff revision 1)
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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">570</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="n">dlg</span><span class="o">-></span><span class="n">target</span><span class="o">-></span><span class="n">vptr</span><span class="o">-></span><span class="n">p_print</span><span class="p">(</span><span class="n">PJSIP_URI_IN_REQ_URI</span><span class="p">,</span> <span class="n">dlg</span><span class="o">-></span><span class="n">target</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">buflen</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;">The preferred method of printing URIs is not to access their vptr directly but instead use pjsip_uri_print()
This can be applied several places throughout this file.</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line583" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.c</a>
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(Diff revision 1)
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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">583</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">type</span><span class="p">,</span> <span class="s">"t38state"</span><span class="p">))</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<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">584</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="n">snprintf</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">buflen</span><span class="p">,</span> <span class="s">"%s"</span><span class="p">,</span> <span class="n">t38state_to_string</span><span class="p">[</span><span class="n">channel</span><span class="o">-></span><span class="n">session</span><span class="o">-></span><span class="n">t38state</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;">Just use ast_copy_string()</pre>
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<a href="https://reviewboard.asterisk.org/r/3038/diff/1/?file=48949#file48949line613" style="color: black; font-weight: bold; text-decoration: underline;">/branches/12/channels/pjsip/dialplan_functions.c</a>
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(Diff revision 1)
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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">613</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span> <span class="k">else</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">614</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="k">return</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; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">615</font></th>
<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;">Print a warning about an unrecognized option here.</pre>
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<p>- Mark Michelson</p>
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<p>On December 1st, 2013, 2:08 p.m. UTC, Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated Dec. 1, 2013, 2:08 p.m.</i></p>
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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 patch adds CHANNEL function support to chan_pjsip. Since things were getting a bit large, all dialplan functions that were in chan_pjsip have also been moved into their own file (dialplan_functions).
Information that can be retrieved:
* rtp,type,[media_type] - Get RTP information, including media source/destination addresses, whether or not the media is secure, etc.
* rtcp,statistic,[media_type] - Get RTCP statistic information
* endpoint - Get the name of the endpoint associated with this channel. Use PJSIP_ENDPOINT to get more info.
* pjsip,type - Get signalling related information, including source/destination addresses, URIs in the INVITE request, whether or not the signalling is using a secure transport, etc.
Note that after this patch is committed, we should go back through the CHANNEL function documentation and move all of the channel technology specific information into <info/> blocks, so that the documentation is co-located with the channel drivers themselves.</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;">See https://reviewboard.asterisk.org/r/3037</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/12/res/res_pjsip_t38.c <span style="color: grey">(403254)</span></li>
<li>/branches/12/include/asterisk/res_pjsip_session.h <span style="color: grey">(403254)</span></li>
<li>/branches/12/funcs/func_channel.c <span style="color: grey">(403254)</span></li>
<li>/branches/12/channels/pjsip/include/dialplan_functions.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/channels/pjsip/include/chan_pjsip.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/channels/pjsip/dialplan_functions.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/channels/chan_pjsip.c <span style="color: grey">(403254)</span></li>
<li>/branches/12/channels/Makefile <span style="color: grey">(403254)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/3038/diff/" style="margin-left: 3em;">View Diff</a></p>
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