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List:       asterisk-dev
Subject:    Re: [asterisk-dev] [Code Review] 4296: PJSIP: Fix bugs and improve documentation of remote attended 
From:       "Joshua Colp" <reviewboard () asterisk ! org>
Date:       2014-12-30 14:28:02
Message-ID: 20141230142802.10702.98658 () sonic ! digium ! api
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> On Dec. 24, 2014, 9:46 p.m., Kevin Harwell wrote:
> > /branches/13/res/res_pjsip_refer.c, lines 604-605
> > <https://reviewboard.asterisk.org/r/4296/diff/1/?file=70013#file70013line604>
> > 
> > I don't think pjsip places a null terminator on the filled in string.  May need \
> > to get the result of the function and add it: replaces[res] = '\0'

I took a gander and I agree with Kevin. Doesn't look like it does.


- Joshua


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviewboard.asterisk.org/r/4296/#review14045
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On Dec. 23, 2014, 10:46 p.m., Mark Michelson wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/4296/
> -----------------------------------------------------------
> 
> (Updated Dec. 23, 2014, 10:46 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Bugs: ASTERISK-24376
> https://issues.asterisk.org/jira/browse/ASTERISK-24376
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> ASTERISK-24376 was created because at SIPit there was confusion about how to get \
> remote attended transfers to work properly when using chan_pjsip. 
> To address this, I investigated the code and discerned what the intended way to \
> perform a remote attended transfer is. I documented my findings on the following \
> wiki page: https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=31096903 \
> Please review the wiki page to ensure it makes sense. 
> While setting up a remote attended transfer, I came across a couple of minor \
>                 issues. The following bug fixes are attached on this review:
> * When sending an INVITE with a Replaces header, the Replaces header was malformed. \
>                 It had the word "Replaces" twice.
> * There was an error message that made it sound like external_replaces was a \
> context being searched for, when it's actually an extension. I changed the log \
> message to be more clear. 
> 
> Diffs
> -----
> 
> /branches/13/res/res_pjsip_refer.c 429698 
> 
> Diff: https://reviewboard.asterisk.org/r/4296/diff/
> 
> 
> Testing
> -------
> 
> I have manually tested this, and I've found that remote attended transfers work as \
> expected with the patch applied. I'm in the process of writing a testsuite test but \
> am fighting with PJSUA at the moment. Since I am going on vacation for a couple of \
> weeks, I felt I should go ahead and get this review posted now. You'll see a \
> testsuite review go up sometime at the start of 2015. Happy Holidays! 
> 
> Thanks,
> 
> Mark Michelson
> 
> 


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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;">  <p style="margin-top: 0;">On December 24th, 2014, 9:46 p.m. UTC, <b>Kevin \
Harwell</b> wrote:</p>  <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;">  



<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; \
border-collapse: collapse; margin: 2px padding: 2px;">  <thead>
  <tr>
   <th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; \
font-size: 9pt; padding: 4px 8px; text-align: left;">  <a \
href="https://reviewboard.asterisk.org/r/4296/diff/1/?file=70013#file70013line604" \
style="color: black; font-weight: bold; text-decoration: \
underline;">/branches/13/res/res_pjsip_refer.c</a>  <span style="font-weight: \
normal;">

     (Diff revision 1)

    </span>
   </th>
  </tr>
 </thead>

 <tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
  <tr>

   <td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static \
void refer_blind_callback(struct ast_channel *chan, struct transfer_channel_data \
*user_data_wrapper,</pre></td>

  </tr>
 </tbody>



 
 

 <tbody>

  <tr>
    <th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">603</font></th>  <td bgcolor="#fdfebc" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">	</span><span \
class="tb">	</span><span class="n">pjsip_hdr_print_on</span><span \
class="p">(</span><span class="n">refer</span><span class="o">-&gt;</span><span \
class="n">replaces</span><span class="p">,</span> <span \
class="n">replaces</span><span class="p">,</span> <span class="k">sizeof</span><span \
class="p">(</span><span class="n">replaces</span><span class="p">))<span \
class="hl">;</span></span></pre></td>  <th bgcolor="#e9eaa8" style="border-left: 1px \
solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">604</font></th>  <td bgcolor="#fdfebc" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "><span class="hl"><span class="tb">	</span><span \
class="tb">	</span></span><span class="k"><span class="hl">if</span></span><span \
class="hl"> </span><span class="p"><span class="hl">(</span></span><span \
class="n">pjsip_hdr_print_on</span><span class="p">(</span><span \
class="n">refer</span><span class="o">-&gt;</span><span \
class="n">replaces</span><span class="p">,</span> <span \
class="n">replaces</span><span class="p">,</span> <span class="k">sizeof</span><span \
class="p">(</span><span class="n">replaces</span><span class="p">))</span><span \
class="hl"> </span><span class="o"><span class="hl">!=</span></span><span class="hl"> \
</span><span class="o"><span class="hl">-</span></span><span class="mi"><span \
class="hl">1</span></span><span class="p"><span class="hl">)</span></span><span \
class="hl"> </span><span class="p"><span class="hl">{</span></span></pre></td>  </tr>

  <tr>
    <th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">604</font></th>  <td bgcolor="#fdfebc" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">	</span><span \
class="tb">	</span><span class="n">pbx_builtin_setvar_helper</span><span \
class="p">(</span><span class="n">chan</span><span class="p">,</span> <span \
class="s">&quot;__SIPREPLACESHDR&quot;</span><span class="p">,</span> <span \
class="n">S_OR</span><span class="p">(</span><span class="n">replaces</span><span \
class="p">,</span> <span class="nb">NULL</span><span class="p">));</span></pre></td>  \
<th bgcolor="#e9eaa8" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">605</font></th>  <td bgcolor="#fdfebc" \
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">replaces_val</span> <span class="o">=</span> <span \
class="n">replaces</span> <span class="o">+</span> <span class="k">sizeof</span><span \
class="p">(</span><span class="s">&quot;Replaces:&quot;</span><span \
class="p">);</span></pre></td>  </tr>

 </tbody>

</table>

  <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 don&#39;t think pjsip \
places a null terminator on the filled in string.  May need to get the result of the \
function and add it: replaces[res] = &#39;\0&#39;</pre>  </blockquote>





</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I took a \
gander and I agree with Kevin. Doesn&#39;t look like it does.</pre> <br />




<p>- Joshua</p>


<br />
<p>On December 23rd, 2014, 10:46 p.m. UTC, Mark Michelson wrote:</p>








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style="background-image: \
url('https://reviewboard.asterisk.org/static/rb/images/review_request_box_top_bg.ab6f3b1072c9.png'); \
background-position: left top; background-repeat: repeat-x; border: 1px black \
solid;">  <tr>
  <td>

<div>Review request for Asterisk Developers.</div>
<div>By Mark Michelson.</div>


<p style="color: grey;"><i>Updated Dec. 23, 2014, 10:46 p.m.</i></p>







<div style="margin-top: 1.5em;">
 <b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>


 <a href="https://issues.asterisk.org/jira/browse/ASTERISK-24376">ASTERISK-24376</a>


</div>



<div style="margin-top: 1.5em;">
 <b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
</div>


<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
 <table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0">  <tr>
  <td>
   <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;">ASTERISK-24376 was created because at SIPit there was confusion about \
how to get remote attended transfers to work properly when using chan_pjsip.

To address this, I investigated the code and discerned what the intended way to \
perform a remote attended transfer is. I documented my findings on the following wiki \
page: https://wiki.asterisk.org/wiki/pages/viewpage.action?pageId=31096903 Please \
review the wiki page to ensure it makes sense.

While setting up a remote attended transfer, I came across a couple of minor issues. \
                The following bug fixes are attached on this review:
* When sending an INVITE with a Replaces header, the Replaces header was malformed. \
                It had the word &quot;Replaces&quot; twice.
* There was an error message that made it sound like external_replaces was a context \
being searched for, when it&#39;s actually an extension. I changed the log message to \
be more clear.</pre>  </td>
 </tr>
</table>


<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0">  <tr>
  <td>
   <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;">I have manually tested this, and I&#39;ve found that remote attended \
transfers work as expected with the patch applied. I&#39;m in the process of writing \
a testsuite test but am fighting with PJSUA at the moment. Since I am going on \
vacation for a couple of weeks, I felt I should go ahead and get this review posted \
now. You&#39;ll see a testsuite review go up sometime at the start of 2015. Happy \
Holidays!</pre>  </td>
 </tr>
</table>


<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">

 <li>/branches/13/res/res_pjsip_refer.c <span style="color: \
grey">(429698)</span></li>

</ul>

<p><a href="https://reviewboard.asterisk.org/r/4296/diff/" style="margin-left: \
3em;">View Diff</a></p>







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