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<a href="https://gitlab.com/dueno">Daiki Ueno</a>
started a new
discussion on <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1512#note_851179706">lib/ext/compress_certificate.c</a>:
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127
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC127" 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="n" style="color: #333;">GNUTLS_E_INVALID_REQUEST</span><span class="p">);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="128" 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">
128
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC128" class="line" lang="c"></span>
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<td class="new_line diff-line-num new" data-linenumber="129" 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">
129
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC129" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">methods_len</span><span class="p">;</span> <span class="o" style="font-weight: 600;">++</span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="p">{</span></span>
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<td class="new_line diff-line-num new" data-linenumber="130" 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">
130
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC130" class="line" lang="c"> <span class="n" style="color: #333;">tmp</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">_gnutls_compress_certificate_method2num</span><span class="p">(</span><span class="n" style="color: #333;">methods</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="131" 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">
131
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC131" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">tmp</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER</span> <span class="o" style="font-weight: 600;">||</span></span>
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<td class="new_line diff-line-num new" data-linenumber="132" 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">
132
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC132" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_compression_get_name</span><span class="p">(</span><span class="n" style="color: #333;">tmp</span><span class="p">)</span> <span class="o" style="font-weight: 600;">==</span> <span class="nb" style="color: #0086b3;">NULL</span><span class="p">)</span></span>
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<td class="new_line diff-line-num new" data-linenumber="133" 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">
133
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC133" 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="n" style="color: #333;">GNUTLS_E_INVALID_REQUEST</span><span class="p">);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="134" 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">
134
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC134" class="line" lang="c"> <span class="n" style="color: #333;">_gnutls_write_uint16</span><span class="p">(</span><span class="n" style="color: #333;">tmp</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint8_t</span> <span class="o" style="font-weight: 600;">*</span><span class="p">)(</span><span class="n" style="color: #333;">algs</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">i</span><span class="p">));</span></span>
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<td class="new_line diff-line-num new" data-linenumber="135" 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">
135
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC135" class="line" lang="c"> <span class="p">}</span></span>
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136
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<td class="new_line diff-line-num new" data-linenumber="137" 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">
137
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC137" class="line" lang="c"> <span class="n" style="color: #333;">_gnutls_hello_ext_unset_priv</span><span class="p">(</span><span class="n" style="color: #333;">session</span><span class="p">,</span> <span class="n" style="color: #333;">GNUTLS_EXTENSION_COMPRESS_CERTIFICATE</span><span class="p">);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="138" 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">
138
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC138" class="line" lang="c"></span>
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<td class="new_line diff-line-num new" data-linenumber="139" 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">
139
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC139" class="line" lang="c"> <span class="n" style="color: #333;">priv</span><span class="p">.</span><span class="n" style="color: #333;">data</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">char</span> <span class="o" style="font-weight: 600;">*</span><span class="p">)</span><span class="n" style="color: #333;">algs</span><span class="p">;</span></span>
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<td class="new_line diff-line-num new" data-linenumber="140" 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">
140
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC140" class="line" lang="c"> <span class="n" style="color: #333;">priv</span><span class="p">.</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">methods_len</span> <span class="o" style="font-weight: 600;">*</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint16_t</span><span class="p">);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="141" 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">
141
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC141" class="line" lang="c"></span>
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<td class="new_line diff-line-num new" data-linenumber="142" 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">
142
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0"><pre style="margin: 0;">+<span id="LC142" class="line" lang="c"> <span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">_gnutls_hello_ext_set_datum</span><span class="p">(</span><span class="n" style="color: #333;">session</span><span class="p">,</span> <span class="n" style="color: #333;">GNUTLS_EXTENSION_COMPRESS_CERTIFICATE</span><span class="p">,</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">priv</span><span class="p">);</span></span>
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<p dir="auto">I would suggest using <code>_gnutls_hello_ext_set_priv</code> instead of <code>_gnutls_hello_ext_set_datum</code>, in a similar manner to <code>gnutls_alpn_set_protocols</code>:</p>
<div class="gl-relative markdown-code-block js-markdown-code">
<pre class="code highlight js-syntax-highlight language-c" lang="c" v-pre="true" style="border-radius: 2px; background-color: #fff; font-family: monospace; font-size: 90%; -premailer-cellpadding: 0; -premailer-cellspacing: 0; -premailer-width: 100%; margin: 0 0 8px; padding: 8px 12px; border: 1px solid #dbdbdb;"><code><span id="LC1" class="line" lang="c"><span class="k" style="font-weight: 600;">typedef</span> <span class="k" style="font-weight: 600;">struct</span> <span class="p">{</span></span>
<span id="LC2" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_compression_method_t</span> <span class="n" style="color: #333;">methods</span><span class="p">[</span><span class="n" style="color: #333;">MAX_COMPRESS_CERTIFICATE_METHODS</span><span class="p">];</span></span>
<span id="LC3" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">size_t</span> <span class="n" style="color: #333;">methods_len</span><span class="p">;</span></span>
<span id="LC4" class="line" lang="c"><span class="p">}</span> <span class="n" style="color: #333;">compress_certificate_ext_st</span><span class="p">;</span></span>
<span id="LC5" class="line" lang="c"></span>
<span id="LC6" class="line" lang="c"><span class="p">...</span></span>
<span id="LC7" class="line" lang="c"></span>
<span id="LC8" class="line" lang="c"><span class="n" style="color: #333;">compress_certificate_ext_st</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">priv</span><span class="p">;</span></span>
<span id="LC9" class="line" lang="c"><span class="n" style="color: #333;">priv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gnutls_malloc</span><span class="p">(</span><span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">priv</span><span class="p">));</span></span>
<span id="LC10" class="line" lang="c"><span class="p">...</span></span>
<span id="LC11" class="line" lang="c"><span class="n" style="color: #333;">memcpy</span><span class="p">(</span><span class="n" style="color: #333;">priv</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">methods</span><span class="p">,</span> <span class="p">...);</span></span>
<span id="LC12" class="line" lang="c"><span class="n" style="color: #333;">_gnutls_hello_ext_set_priv</span><span class="p">(...,</span> <span class="n" style="color: #333;">priv</span><span class="p">);</span></span></code></pre>
<copy-code></copy-code>
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<p dir="auto">That way, the conversiosn between <code>uint8_t *</code> and <code>gnutls_compression_method_t *</code> will be unnecessary.</p>
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