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This is an automatically generated e-mail. To reply, visit:
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<p style="margin-top: 0;">On May 1st, 2014, 6:51 p.m. UTC, <b>Kevin Harwell</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3519/diff/1/?file=58191#file58191line1049" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/media_formats-reviewed/channels/chan_h323.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int __oh323_rtp_create(struct oh323_pvt *pvt)</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><span class="k">if</span> <span class="p">(</span><span class="n">pvt</span><span class="o">-></span><span class="n">peercapability</span><span class="p">)</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c1"><span class="hl">//</span><span class="tb"> </span>if (pvt->peercapability)</span></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><span class="tb"> </span><span class="n">ast_rtp_codecs_packetization_set</span><span class="p">(</span><span class="n">ast_rtp_instance_get_codecs</span><span class="p">(</span><span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">),</span> <span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">,</span> <span class="o">&</span><span class="n">pvt</span><span class="o">-></span><span class="n">peer_prefs</span><span class="p">);</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c1"><span class="hl">//</span><span class="tb"> </span><span class="tb"> </span>ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->peer_prefs);</span></pre></td>
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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;">If no longer needed then delete, or did you mean to come back to this?</pre>
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<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;">BUGBUGs added.</pre>
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<p style="margin-top: 0;">On May 1st, 2014, 6:51 p.m. UTC, <b>Kevin Harwell</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3519/diff/1/?file=58191#file58191line2615" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/media_formats-reviewed/channels/chan_h323.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)</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><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">ast_rtp_codecs_packetization_set</span><span class="p">(</span><span class="n">ast_rtp_instance_get_codecs</span><span class="p">(</span><span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">),</span> <span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">,</span> <span class="o">&</span><span class="n">pvt</span><span class="o">-></span><span class="n">peer_prefs</span><span class="p">);</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c1"><span class="hl">//</span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->peer_prefs);</span></pre></td>
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<td bgcolor="#ffffff" 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> <span class="k">else</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffffff" 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> <span class="k">else</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffffff" 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">ast_debug</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="s">"Autoframing option not set, ignoring peer's packetization settings</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span></pre></td>
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<td bgcolor="#ffffff" 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">ast_debug</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="s">"Autoframing option not set, ignoring peer's packetization settings</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span></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><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">ast_rtp_codecs_packetization_set</span><span class="p">(</span><span class="n">ast_rtp_instance_get_codecs</span><span class="p">(</span><span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">),</span> <span class="n">pvt</span><span class="o">-></span><span class="n">rtp</span><span class="p">,</span> <span class="o">&</span><span class="n">pvt</span><span class="o">-></span><span class="n">options</span><span class="p">.</span><span class="n">prefs</span><span class="p">);</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c1"><span class="hl">//</span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->options.prefs);</span></pre></td>
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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;">More of the same commented code.</pre>
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<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;">Ditto.</pre>
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<p style="margin-top: 0;">On May 1st, 2014, 6:51 p.m. UTC, <b>Kevin Harwell</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3519/diff/1/?file=58192#file58192line6282" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/media_formats-reviewed/channels/chan_iax2.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int decode_frame(ast_aes_decrypt_key *dcx, struct ast_iax2_full_hdr *fh, struct ast_frame *f, int *datalen)</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><span class="tb"> </span><span class="tb"> </span><span class="hl">ast_format_from_old_bitfield(&</span>f->subclass.format<span class="hl">, </span>(uncompress_subclass(fh->csub & ~0x40) | ((fh->csub >> 6) & 0x1))<span class="hl">)</span>;</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><span class="tb"> </span><span class="tb"> </span>f->subclass.format<span class="hl"> = ast_format_compatibility_bitfield2format</span>(uncompress_subclass(fh->csub & ~0x40) | ((fh->csub >> 6) & 0x1));</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>} else if (f->frametype == AST_FRAME_VOICE) {</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span>} else if (f->frametype == AST_FRAME_VOICE) {</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><span class="tb"> </span><span class="tb"> </span>ast_format_from_old_bitfield(&f->subclass.format, uncompress_subclass(fh->csub));</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><span class="tb"> </span><span class="tb"> </span>f->subclass.format = ast_format_compatibility_bitfield2format(uncompress_subclass(fh->csub));</pre></td>
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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;">May not be a problem, but what happens if/when these formats get unref'ed since it points to a global object? If the incoming frame is on the stack the format won't be unref'ed so should be fine, otherwise these might need a ref bump.</pre>
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<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;">It is indeed on the stack and is safe.</pre>
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<p style="margin-top: 0;">On May 1st, 2014, 6:51 p.m. UTC, <b>Kevin Harwell</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3519/diff/1/?file=58205#file58205line308" style="color: black; font-weight: bold; text-decoration: underline;">/team/group/media_formats-reviewed/main/format_compatibility.c</a>
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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">ast_format</span> <span class="o">*</span><span class="n">ast_codec_pref_index</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_codec_pref</span> <span class="o">*</span><span class="n">pref</span><span class="p">,</span> <span class="kt">int</span> <span class="n">idx</span><span class="p">,</span> <span class="k">struct</span> <span class="n">ast_format</span> <span class="o">**</span><span class="n">result</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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<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">idx</span> <span class="o">>=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">&&</span> <span class="p">(</span><span class="n">idx</span> <span class="o"><</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">pref</span><span class="o">-></span><span class="n">order</span><span class="p">))</span> <span class="o">&&</span> <span class="n">pref</span><span class="o">-></span><span class="n">order</span><span class="p">[</span><span class="n">idx</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="o">*</span><span class="n">result</span> <span class="o">=</span> <span class="n">ast_format_compatibility_bitfield2format</span><span class="p">(</span><span class="n">pref</span><span class="o">-></span><span class="n">order</span><span class="p">[</span><span class="n">idx</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> <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; "><span class="tb"> </span><span class="tb"> </span><span class="o">*</span><span class="n">result</span> <span class="o">=</span> <span class="nb">NULL</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">return</span> <span class="o">*</span><span class="n">result</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="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">It looks possible that this could return NULL. Looking through some of the code I saw a few spots where this function was called but the NULL result was not checked for and there would be a possibility of a NULL pointer being dereffed. So do those places need a NULL check, should this return some kind of empty format representing NULL, or is this something that really should never happen or are all the cases calling this know based on the passed in params that NULL won't be returned?</pre>
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<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've looked over the channel drivers that are using this (chan_iax2/chan_h323) and both either check the value directly or do check getting a NULL return value. Can you point to some specific cases?</pre>
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<p>- Joshua</p>
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<p>On April 30th, 2014, 10:54 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 April 30, 2014, 10:54 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 a legacy legacy format compatibility API which is used by chan_iax2, chan_h323, and chan_misdn to work in new media formats land.</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/media_formats-reviewed/main/format_compatibility.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/team/group/media_formats-reviewed/main/codec_builtin.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/include/asterisk/translate.h <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/include/asterisk/format_compatibility.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/team/group/media_formats-reviewed/include/asterisk/format_cache.h <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/include/asterisk/codec.h <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/codecs/codec_dahdi.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/iax2/provision.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/iax2/parser.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/h323/chan_h323.h <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/h323/ast_h323.cxx <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/chan_phone.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/chan_misdn.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/chan_iax2.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/channels/chan_h323.c <span style="color: grey">(413144)</span></li>
<li>/team/group/media_formats-reviewed/apps/app_meetme.c <span style="color: grey">(413144)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/3519/diff/" style="margin-left: 3em;">View Diff</a></p>
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