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<h3>
Eric S. Raymond pushed to branch master
at <a href="https://gitlab.com/NTPsec/ntpsec">NTPsec / ntpsec</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/4c6c346cfdcfb17287960548fb9806d008a1f444">4c6c346c</a></strong>
<div>
<span>by Eric S. Raymond</span>
<i>at 2019-01-28T15:38:08Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Allow receipt of packets long enough to contain extension fields.
</pre>
</li>
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<h4>2 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#5e0fce9acc6e0e17a3faccf9a42ea8cc593c0cea">
include/ntp.h
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</li>
<li class="file-stats">
<a href="#a9eeb2d7f139fd99254bacd1e507b63de174c843">
ntpd/ntp_proto.c
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</li>
</ul>
<h4>Changes:</h4>
<li id="5e0fce9acc6e0e17a3faccf9a42ea8cc593c0cea">
<a href="https://gitlab.com/NTPsec/ntpsec/commit/4c6c346cfdcfb17287960548fb9806d008a1f444#5e0fce9acc6e0e17a3faccf9a42ea8cc593c0cea"><strong>include/ntp.h</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -345,7 +345,10 @@ struct peer {</td>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* #define      MODE_BCLIENT    6       ** broadcast client mode */</span></span>
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<pre style="margin: 0;"> <span id="LC346" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   MODE_BCLIENTX   6       </span><span class="cm" style="color: #998; font-style: italic;">/* for pylib/util.py */</span></span>
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<pre style="margin: 0;">-<span id="LC348" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   LEN_PKT_NOMAC   48 </span><span class="cm" style="color: #998; font-style: italic;">/* min header length */</span></span>
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<pre style="margin: 0;">+<span id="LC348" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   LEN_PKT_NOMAC   48      </span><span class="cm" style="color: #998; font-style: italic;">/* min header length */</span></span>
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<pre style="margin: 0;">+<span id="LC349" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC350" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* The RFCs carefully avoid specifying this. */</span></span>
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<pre style="margin: 0;">+<span id="LC351" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define MAX_EXT_LEN       4096    </span><span class="cm" style="color: #998; font-style: italic;">/* maximum length of extension-field data */</span></span>
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<pre style="margin: 0;"> <span id="LC353" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* pythonize-header: start ignoring */</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -374,6 +377,13 @@ struct peer {</td>
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<pre style="margin: 0;"> <span id="LC377" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   FLAG_DNS        0x0800u </span><span class="cm" style="color: #998; font-style: italic;">/* needs DNS lookup */</span></span>
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<pre style="margin: 0;"> <span id="LC378" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define FLAG_TSTAMP_PPS   0x4cd000u       </span><span class="cm" style="color: #998; font-style: italic;">/* PPS source provides absolute timestamp */</span></span>
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<pre style="margin: 0;">+<span id="LC380" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* The MAC follows any extension fields. */</span></span>
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<pre style="margin: 0;">+<span id="LC381" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Its length includes 1 word of keyID. */</span></span>
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<pre style="margin: 0;">+<span id="LC382" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* MD5 length is 16 bytes => 4+1 */</span></span>
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<pre style="margin: 0;">+<span id="LC383" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* SHA length is 20 bytes => 5+1 */</span></span>
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<pre style="margin: 0;">+<span id="LC384" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define MIN_MAC_LEN       (1 * sizeof(uint32_t))  </span><span class="cm" style="color: #998; font-style: italic;">/* crypto_NAK */</span></span>
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<pre style="margin: 0;">+<span id="LC385" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   MAX_MAC_LEN     (6 * sizeof(uint32_t))  </span><span class="cm" style="color: #998; font-style: italic;">/* maximum MAC length */</span></span>
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<pre style="margin: 0;">+<span id="LC386" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC387" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* This is the new, sane way of representing packets. All fields are</span></span>
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<pre style="margin: 0;"> <span id="LC388" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">   in host byte order, and the fixed-point time fields are just integers,</span></span>
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<pre style="margin: 0;"> <span id="LC389" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">   with uints of 2^-16 or 2^-32 seconds as appropriate. */</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -418,16 +428,7 @@ struct pkt {</td>
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<pre style="margin: 0;"> <span id="LC428" class="line" lang="c">    <span class="n" style="color: #333;">l_fp_w</span>      <span class="n" style="color: #333;">org</span><span class="p">;</span>           <span class="cm" style="color: #998; font-style: italic;">/* originate time stamp */</span></span>
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<pre style="margin: 0;"> <span id="LC429" class="line" lang="c">    <span class="n" style="color: #333;">l_fp_w</span>      <span class="n" style="color: #333;">rec</span><span class="p">;</span>           <span class="cm" style="color: #998; font-style: italic;">/* receive time stamp */</span></span>
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<pre style="margin: 0;"> <span id="LC430" class="line" lang="c">    <span class="n" style="color: #333;">l_fp_w</span>      <span class="n" style="color: #333;">xmt</span><span class="p">;</span>           <span class="cm" style="color: #998; font-style: italic;">/* transmit time stamp */</span></span>
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<pre style="margin: 0;">-<span id="LC421" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC422" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Old style authentication was just appended</span></span>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC423" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * without the type/length of an extension header. */</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC424" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Length includes 1 word of keyID */</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC425" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* MD5 length is 16 bytes => 4+1 */</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC426" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* SHA length is 20 bytes => 5+1 */</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC427" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define MIN_MAC_LEN       (1 * sizeof(uint32_t))  </span><span class="cm" style="color: #998; font-style: italic;">/* crypto_NAK */</span></span>
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<pre style="margin: 0;">-<span id="LC428" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define   MAX_MAC_LEN     (6 * sizeof(uint32_t))  </span><span class="cm" style="color: #998; font-style: italic;">/* MAX of old style */</span></span>
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<pre style="margin: 0;">-<span id="LC429" class="line" lang="c"></span>
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<td class="diff-line-num new_line old" data-linenumber="431" 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="LC430" class="line" lang="c">    <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">exten</span><span class="p">[(</span><span class="n" style="color: #333;">MAX_MAC_LEN</span><span class="p">)</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;">uint32_t</span><span class="p">)];</span></span>
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<td class="diff-line-num new new_line" data-linenumber="431" 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="LC431" class="line" lang="c">    <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">exten</span><span class="p">[(</span><span class="n" style="color: #333;">MAX_MAC_LEN</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">MAX_EXT_LEN</span><span class="p">)</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;">uint32_t</span><span class="p">)];</span></span>
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<pre style="margin: 0;"> <span id="LC432" class="line" lang="c"><span class="p">}</span> <span class="n" style="color: #333;">__attribute__</span> <span class="p">((</span><span class="n" style="color: #333;">aligned</span><span class="p">));</span></span>
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<pre style="margin: 0;"> <span id="LC433" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC434" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* pythonize-header: stop ignoring */</span></span>
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<li id="a9eeb2d7f139fd99254bacd1e507b63de174c843">
<a href="https://gitlab.com/NTPsec/ntpsec/commit/4c6c346cfdcfb17287960548fb9806d008a1f444#a9eeb2d7f139fd99254bacd1e507b63de174c843"><strong>ntpd/ntp_proto.c</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="248" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -248,7 +248,13 @@ parse_packet(</td>
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<pre style="margin: 0;"> <span id="LC248" class="line" lang="c">    <span class="kt" style="color: #458; font-weight: 600;">uint8_t</span> <span class="k" style="font-weight: 600;">const</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">recv_buf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rbufp</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">recv_space</span><span class="p">.</span><span class="n" style="color: #333;">X_recv_buffer</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC249" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC250" class="line" lang="c">    <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">recv_length</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">LEN_PKT_NOMAC</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC251" class="line" lang="c">            <span class="cm" style="color: #998; font-style: italic;">/* Packet is too short to possibly be valid. */</span></span>
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<td class="diff-line-num new old_line" data-linenumber="252" 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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<td class="diff-line-num new new_line" data-linenumber="251" 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="LC251" class="line" lang="c">            <span class="cm" style="color: #998; font-style: italic;">/* Data is too short to possibly be a valid packet. */</span></span>
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<td class="diff-line-num new old_line" data-linenumber="252" 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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<td class="diff-line-num new new_line" data-linenumber="252" 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="LC252" class="line" lang="c">            <span class="k" style="font-weight: 600;">return</span> <span class="nb" style="color: #0086b3;">false</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="253" 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="LC253" class="line" lang="c">    <span class="p">}</span></span>
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<td class="diff-line-num new old_line" data-linenumber="252" 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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<td class="diff-line-num new new_line" data-linenumber="254" 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="LC254" class="line" lang="c"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="252" 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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<td class="diff-line-num new new_line" data-linenumber="255" 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="LC255" class="line" lang="c">    <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">recv_length</span> <span class="o" style="font-weight: 600;">></span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">pkt</span><span class="p">))</span> <span class="p">{</span></span>
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<td class="diff-line-num new new_line" data-linenumber="256" 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="LC256" class="line" lang="c">            <span class="cm" style="color: #998; font-style: italic;">/* Data is too long to be punned into the wire-packet struct. */</span></span>
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<td class="diff-line-num new new_line" data-linenumber="257" 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="LC257" class="line" lang="c">            <span class="cm" style="color: #998; font-style: italic;">/* If this happens it will be due to too much extension data. */</span></span>
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252
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<pre style="margin: 0;"> <span id="LC258" class="line" lang="c">            <span class="k" style="font-weight: 600;">return</span> <span class="nb" style="color: #0086b3;">false</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC259" class="line" lang="c">    <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC260" class="line" lang="c"></span>
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