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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4431/">https://reviewboard.asterisk.org/r/4431/</a>
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<p style="margin-top: 0;">On February 19th, 2015, 7:58 p.m. CST, <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/4431/diff/1/?file=71469#file71469line386" style="color: black; font-weight: bold; text-decoration: underline;">/branches/11/res/res_http_websocket.c</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int AST_OPTIONAL_API_NAME(ast_websocket_set_timeout)(struct ast_websocket *session, int timeout)</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">386</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="tb"> </span><span class="n">sanity</span><span class="o">--</span><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;">Change to:
if (!--sanity) {
move after loop sanity check closing here.
}
Moving the sanity exit handling here will avoid waiting (possibly for a long time) for data when we have already failed sanity and it won't matter if we somehow actually do read more data.
The loop becomes:
sanity = 10;
for (;;) {
...
if (!rlen) {
...
if (!--sanity) {
sanity session close and exit.
}
}
}
return 0;</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;">"possibly for a long time" is at most one second, right?</pre>
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<p>- David</p>
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<p>On February 18th, 2015, 4:32 p.m. CST, David Lee wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By David Lee.</div>
<p style="color: grey;"><i>Updated Feb. 18, 2015, 4:32 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;">Some WebSocket applications, like [chan_respoke][], require a larger
frame size than the default 8k; this patch bumps the default to 16k.
This patch also fixes some problems exacerbated by large frames.
The sanity counter was decremented on every fread attempt in
ws_safe_read(), regardless of whether data was read from the socket or
not. For large frames, this could result in loss of sanity prior to
reading the entire frame. (16k frame / 1448 bytes per segment = 12
segments).
This patch changes the sanity counter so that it only decrements when
fread() doesn't read any bytes. This more closely matches the original
intention of ws_safe_read(), given that the error message is
"Websocket seems unresponsive".
This patch also properly logs EOF conditions, so disconnects are no
longer confused with unresponsive connections.
[chan_respoke]: https://github.com/respoke/chan_respoke</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;">Ran a Node app that continuously send large WebSocket frame to Asterisk.
https://gist.github.com/leedm777/ba6d86468d7646073286
Without the patch, Asterisk fails in less than 10 frames. With the patch, it runs like a boss.</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/11/res/res_http_websocket.c <span style="color: grey">(431915)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4431/diff/" style="margin-left: 3em;">View Diff</a></p>
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