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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2228/">https://reviewboard.asterisk.org/r/2228/</a>
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<a href="https://reviewboard.asterisk.org/r/2228/diff/3/?file=32308#file32308line389" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_srtp.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; ">tryagain:</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">387</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">388</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">srtp</span><span class="o">-></span><span class="n">session</span> <span class="o">=</span> <span class="nb">NULL</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;">It was rather subtle as to why you need to set srtp->session to NULL here after srtp_create fails. A comment may be useful explaining why.</pre>
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<a href="https://reviewboard.asterisk.org/r/2228/diff/3/?file=32308#file32308line397" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_srtp.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; ">tryagain:</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">srtp</span><span class="o">-></span><span class="n">session</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="n">ast_log</span><span class="p">(</span><span class="n">LOG_ERROR</span><span class="p">,</span> <span class="s">"SRTP session was destroyed and could not be recovered.</span><span class="se">\n</span><span class="s">"</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="n">errno</span> <span class="o">=</span> <span class="n">EINVAL</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="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; "> <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 error message here is a bit confusing: why was the SRTP session destroyed in the first place?
In general, we only attempt to destroy and re-create the session on an unprotect failure. You may want to rephrase the error message as:
"SRTP session could not be re-created after unprotect failure: %s"
Where %s is the failure returned from srtp_create. Note that this means you'll have to actually store the return code and print out the error message using srtp_errstr - so the error message should probably be moved up to line 387.</pre>
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<p>- Matt</p>
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<p>On December 6th, 2012, 11:02 a.m., jrose wrote:</p>
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<div>Review request for Asterisk Developers, Mark Michelson and Matt Jordan.</div>
<div>By jrose.</div>
<p style="color: grey;"><i>Updated Dec. 6, 2012, 11:02 a.m.</i></p>
<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;">If srtp_create fails, session we create for temp will either not be created or else will be dealloced within srtp_create. At present, when we then run ast_srtp_destroy, attempting to dealloc this can cause Asterisk to crash. This patch addresses that by setting the session pointer to NULL so ast_srtp_destroy doesn't attempt to dealloc it.
As one might expect, this patch doesn't resolve the reporter's problems with actually setting up an srtp enabled SIP call, but it does fix a crash which shouldn't be happening.</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;">The reporter has tested the patch and confirmed that it eliminates the crash.</pre>
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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-20499">ASTERISK-20499</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/1.8/res/res_srtp.c <span style="color: grey">(377339)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2228/diff/" style="margin-left: 3em;">View Diff</a></p>
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