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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42469#file42469line232" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/res_sip_session.h</a>
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(Diff revision 3)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">struct ast_sip_session_supplement {</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> * \brief Defer re-invited stream</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> * \param session The session for which the media is being re-invited</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> * \param session_media The media being reinvited</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> * \param sdp The entire SDP.</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> * \retval 0 The stream was not handled by this handler. If there are other registered handlers for this stream type, they will be called.</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> * \retval <0 Re-invite should be deferred. No further operation will take place.</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> * \retval >0 The stream was explicitly not deferred by this handler. No further handler of this stream type will be called.</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> * \note This is optional, if not implemented the stream is assumed to not be deferred.</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></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">int</span> <span class="p">(</span><span class="o">*</span><span class="n">defer_incoming_sdp_stream</span><span class="p">)(</span><span class="k">struct</span> <span class="n">ast_sip_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="k">struct</span> <span class="n">ast_sip_session_media</span> <span class="o">*</span><span class="n">session_media</span><span class="p">,</span> <span class="k">const</span> <span class="k">struct</span> <span class="n">pjmedia_sdp_session</span> <span class="o">*</span><span class="n">sdp</span><span class="p">,</span> <span class="k">const</span> <span class="k">struct</span> <span class="n">pjmedia_sdp_media</span> <span class="o">*</span><span class="n">stream</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="cm">/*!</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 could use a better explanation than the brief description given. What does it mean to "defer" a re-invited stream? What is this callback expected to do?</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42469#file42469line553" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/res_sip_session.h</a>
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(Diff revision 3)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void ast_sip_session_send_request_with_cb(struct ast_sip_session *session, pjsip_tx_data *tdata,</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \note It is possible for the defer_incoming_sdp_stream callback to be called yet again when this is invoked</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 comment could use some clarification. "yet again" is not indicative of where the defer_incoming_sdp_stream callback may originally be called.</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42472#file42472line783" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_session.c</a>
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(Diff revision 3)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata);</pre></td>
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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">handle_deferring_sdp</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_sip_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="k">const</span> <span class="n">pjmedia_sdp_session</span> <span class="o">*</span><span class="n">sdp</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 return values of this function need to be documented.</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42472#file42472line810" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_session.c</a>
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(Diff revision 3)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata);</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">res</span> <span class="o">=</span> <span class="n">handler</span><span class="o">-></span><span class="n">defer_incoming_sdp_stream</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="tb"> </span><span class="n">session</span><span class="p">,</span> <span class="n">session_media</span><span class="p">,</span> <span class="n">sdp</span><span class="p">,</span> <span class="n">sdp</span><span class="o">-></span><span class="n">media</span><span class="p">[</span><span class="n">i</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">if</span> <span class="p">(</span><span class="n">res</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="tb"> </span><span class="tb"> </span><span class="k">return</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="tb"> </span><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;">Why do we return if res = 0 here?</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42472#file42472line856" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_session.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata);</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">if</span> <span class="p">(</span><span class="n">rdata</span><span class="o">-></span><span class="n">msg_info</span><span class="p">.</span><span class="n">msg</span><span class="o">-></span><span class="n">line</span><span class="p">.</span><span class="n">req</span><span class="p">.</span><span class="n">method</span><span class="p">.</span><span class="n">id</span> <span class="o">!=</span> <span class="n">PJSIP_INVITE_METHOD</span> <span class="o">||</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="o">!</span><span class="p">(</span><span class="n">dlg</span> <span class="o">=</span> <span class="n">pjsip_ua_find_dialog</span><span class="p">(</span><span class="o">&</span><span class="n">rdata</span><span class="o">-></span><span class="n">msg_info</span><span class="p">.</span><span class="n">cid</span><span class="o">-></span><span class="n">id</span><span class="p">,</span> <span class="o">&</span><span class="n">rdata</span><span class="o">-></span><span class="n">msg_info</span><span class="p">.</span><span class="n">to</span><span class="o">-></span><span class="n">tag</span><span class="p">,</span> <span class="o">&</span><span class="n">rdata</span><span class="o">-></span><span class="n">msg_info</span><span class="p">.</span><span class="n">from</span><span class="o">-></span><span class="n">tag</span><span class="p">,</span> <span class="n">PJ_FALSE</span><span class="p">))</span> <span class="o">||</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="o">!</span><span class="p">(</span><span class="n">session</span> <span class="o">=</span> <span class="n">ast_sip_dialog_get_session</span><span class="p">(</span><span class="n">dlg</span><span class="p">)))</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">859</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="n">PJ_FALSE</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">860</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;">Hm, seeing this really makes me think the distributor should be caching the dialog on the rdata since the distributor has already had to look up the dialog before the request reaches this point.
Not opening an issue since that's outside the scope of FAX support, but I'm noting it anyway.</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42472#file42472line884" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_session.c</a>
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(Diff revision 3)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata);</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">if</span> <span class="p">(</span><span class="o">!</span><span class="p">(</span><span class="n">sdp_info</span> <span class="o">=</span> <span class="n">pjsip_rdata_get_sdp_info</span><span class="p">(</span><span class="n">rdata</span><span class="p">))</span> <span class="o">||</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">885</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="p">(</span><span class="n">sdp_info</span><span class="o">-></span><span class="n">sdp_err</span> <span class="o">!=</span> <span class="n">PJ_SUCCESS</span><span class="p">)</span> <span class="o">||</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">886</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="o">!</span><span class="n">sdp_info</span><span class="o">-></span><span class="n">sdp</span> <span class="o">||</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">887</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="o">!</span><span class="n">handle_deferring_sdp</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">sdp_info</span><span class="o">-></span><span class="n">sdp</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">PJ_FALSE</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;">I'm puzzled about the handling of the return value of handle_deferring_sdp() here. My interpretation of handle_deferring_sdp() was that a zero return was successful. Is a successful return here supposed to result in the request bubbling up the stack further? It seems a bit backwards.</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42474#file42474line310" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_t38.c</a>
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(Diff revision 3)
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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">RAII_VAR</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_sip_session_media</span> <span class="o">*</span><span class="p">,</span> <span class="n">session_media</span><span class="p">,</span> <span class="n">ao2_find</span><span class="p">(</span><span class="n">data</span><span class="o">-></span><span class="n">session</span><span class="o">-></span><span class="n">media</span><span class="p">,</span> <span class="s">"image"</span><span class="p">,</span> <span class="n">OBJ_KEY</span><span class="p">),</span> <span class="n">ao2_cleanup</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="cm">/* Without state we can't interpret parameters */</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">if</span> <span class="p">(</span><span class="o">!</span><span class="n">state</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="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="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;">Also return early if session_media is NULL.</pre>
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<a href="https://reviewboard.asterisk.org/r/2692/diff/3/?file=42474#file42474line417" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_sip_t38.c</a>
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(Diff revision 3)
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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="n">session_media</span> <span class="o">=</span> <span class="n">ao2_find</span><span class="p">(</span><span class="n">session</span><span class="o">-></span><span class="n">media</span><span class="p">,</span> <span class="s">"image"</span><span class="p">,</span> <span class="n">OBJ_KEY</span><span class="p">))</span> <span class="o">&&</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">session_media</span><span class="o">-></span><span class="n">udptl</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="n">f</span> <span class="o">=</span> <span class="n">ast_udptl_read</span><span class="p">(</span><span class="n">session_media</span><span class="o">-></span><span class="n">udptl</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="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;">Are you supposed to ast_frfree(f) before setting it to a new value?</pre>
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<p>- Mark</p>
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<p>On July 25th, 2013, 4:34 p.m. UTC, Joshua Colp wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Joshua Colp.</div>
<p style="color: grey;"><i>Updated July 25, 2013, 4:34 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 change adds T.38 support to chan_pjsip. A seperate optional module has been created which contains the T.38 state machine, SDP parsing/generation, and UDPTL sending/receiving.</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;">Tested sending and receiving using Zoiper.</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/channels/chan_gulp.c <span style="color: grey">(395397)</span></li>
<li>/trunk/include/asterisk/res_sip.h <span style="color: grey">(395397)</span></li>
<li>/trunk/include/asterisk/res_sip_session.h <span style="color: grey">(395397)</span></li>
<li>/trunk/res/res_sip.c <span style="color: grey">(395397)</span></li>
<li>/trunk/res/res_sip/sip_configuration.c <span style="color: grey">(395397)</span></li>
<li>/trunk/res/res_sip_session.c <span style="color: grey">(395397)</span></li>
<li>/trunk/res/res_sip_session.exports.in <span style="color: grey">(395397)</span></li>
<li>/trunk/res/res_sip_t38.c <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2692/diff/" style="margin-left: 3em;">View Diff</a></p>
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