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<a href="https://gitlab.com/tomato42">Hubert Kario</a>
started a new discussion
on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/879#note_137186072">lib/ext/record_size_limit.c</a>:
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="c">     <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">new_size</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">MIN_RECORD_SIZE</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="c">             <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="c"></span>
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<td class="diff-line-num new_line old" data-linenumber="69" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
 
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<pre style="margin: 0;">-<span id="LC69" class="line" lang="c">     <span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">internals</span><span class="p">.</span><span class="n" style="color: #333;">hsk_flags</span> <span class="o" style="font-weight: 600;">|=</span> <span class="n" style="color: #333;">HSK_RECORD_SIZE_LIMIT_NEGOTIATED</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="c">     <span class="cm" style="color: #998; font-style: italic;">/* if a record size larger than user specified maximum, ignore it */</span></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="c">     <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">new_size</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">security_parameters</span><span class="p">.</span><span class="n" style="color: #333;">max_record_send_size</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="71" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="c">             <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC71" class="line" lang="c">     <span class="cm" style="color: #998; font-style: italic;">/* if a larger record size limit than the protocol limit is</span></span>
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<pre style="margin: 0;">-<span id="LC72" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">  * provided by the peer, ignore it and stick to the default */</span></span>
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<pre style="margin: 0;">-<span id="LC73" class="line" lang="c">     <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">unlikely</span><span class="p">(</span><span class="n" style="color: #333;">new_size</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">DEFAULT_MAX_RECORD_SIZE</span><span class="p">))</span></span>
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<td class="diff-line-num new_line old" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
 
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<pre style="margin: 0;">-<span id="LC74" class="line" lang="c">             <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">gnutls_assert_val</span><span class="p">(</span><span class="mi" style="color: #099;">0</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="c">     <span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">internals</span><span class="p">.</span><span class="n" style="color: #333;">hsk_flags</span> <span class="o" style="font-weight: 600;">|=</span> <span class="n" style="color: #333;">HSK_RECORD_SIZE_LIMIT_NEGOTIATED</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC76" class="line" lang="c">     <span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">security_parameters</span><span class="p">.</span><span class="n" style="color: #333;">max_record_send_size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_size</span><span class="p">;</span></span>
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<p dir="auto">the comment was correct - if the new_size is bigger than the MAX_RECORD_SIZE, then the agreed upon value <em>is</em> the max record size (it may change in the future when new extensions allow negotiating values above 2^14, but it's not the case now)</p>
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