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<h3>
Eric S. Raymond pushed to branch master
at <a href="https://gitlab.com/NTPsec/ntpsec">NTPsec / ntpsec</a>
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<h4>
Commits:
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<ul>
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<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/fd2f2eb7e228c8d00c9a5637ae2deb941ee23987">fd2f2eb7</a></strong>
<div>
<span>by Eric S. Raymond</span>
<i>at 2019-02-18T15:13:15Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NTPv5: add a field for source cycle detection.
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<h4>1 changed file:</h4>
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<a href="#9e6facf84d8e6ca6376177b93a71218f3632d443">
devel/ntpv5.adoc
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<h4>Changes:</h4>
<li id="9e6facf84d8e6ca6376177b93a71218f3632d443">
<a href="https://gitlab.com/NTPsec/ntpsec/commit/fd2f2eb7e228c8d00c9a5637ae2deb941ee23987#9e6facf84d8e6ca6376177b93a71218f3632d443"><strong>devel/ntpv5.adoc</strong></a>
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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">@@ -36,14 +36,14 @@ which is interpreted as a packet type.</td>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext">Following the mode, the body of the packet is encoded in a strict</span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext">subset of JSON intended to avoid known edge cases decribed in</span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="plaintext"><<<Seriot2016>>>. The outermost enclosing {} is required. Trailing</span>
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<pre style="margin: 0;">-<span id="LC39" class="line" lang="plaintext">commas on elements are disallowed. Scientific notation is</span>
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<pre style="margin: 0;">-<span id="LC40" class="line" lang="plaintext"><span class="idiff left right">not used. String literals may not contain the characters TAB, LF, CR</span>,</span>
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<pre style="margin: 0;">-<span id="LC41" class="line" lang="plaintext"><span class="idiff left right">"{", "}", or "|". The JSON MUST use only ASCII space (0x20) as a</span></span>
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<pre style="margin: 0;">-<span id="LC42" class="line" lang="plaintext"><span class="idiff left right">whitespace character and MUST NOT use TAB, LF, CR or other Unicode</span></span>
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<pre style="margin: 0;">-<span id="LC43" class="line" lang="plaintext">characters.</span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="plaintext">commas on elements are disallowed. Scientific notation is<span class="idiff left right"> not used.</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="plaintext"><span class="idiff left right">String literals may not contain the characters TAB (0x09), LF (0x0A)</span>,</span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="plaintext"><span class="idiff left right">CR (0x0D), "{", "}", or "|". The JSON MUST use only ASCII space (0x20)</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="plaintext"><span class="idiff left right">as a whitespace character and MUST NOT use TAB, LF, CR or UTF-8</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="plaintext">characters<span class="idiff left right"> outside the ASCII range as whitespace</span>.</span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="plaintext">The packet body MAY optionally be followed by an authentication</span>
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<pre style="margin: 0;">-<span id="LC46" class="line" lang="plaintext">trailer. If present, the trailer consists of an ASCII "|" followed</span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="plaintext">trailer. If present, the trailer consists of an ASCII "|" <span class="idiff left right">(0x7C) </span>followed</span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="plaintext">by an octet string encoded as hex-digit pairs.</span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="plaintext">//FIXME: Add a description of how to compute the authentication trailer.</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">@@ -102,7 +102,7 @@ smearing locally if at all.</td>
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<pre style="margin: 0;"> <span id="LC102" class="line" lang="plaintext">== Time request packet</span>
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<pre style="margin: 0;"> <span id="LC103" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC104" class="line" lang="plaintext">A time request packet MUST specify type 0. No other content is</span>
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<pre style="margin: 0;">-<span id="LC105" class="line" lang="plaintext">required. The packet body may be omitted. (Th<span class="idiff left right">i</span>us, the minimal</span>
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<pre style="margin: 0;">+<span id="LC105" class="line" lang="plaintext">required. The packet body may be omitted. (Thus, the minimal</span>
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<pre style="margin: 0;"> <span id="LC106" class="line" lang="plaintext">request packet is "+0\n" where \n is a LF (ASCII 10),</span>
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<pre style="margin: 0;"> <span id="LC107" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC108" class="line" lang="plaintext">Note: this corresponds to a minimal SNTP packet under RFC2030.</span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="134" 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">@@ -134,11 +134,13 @@ The following fields are retained from NTPv4:</td>
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<pre style="margin: 0;"> <span id="LC134" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC135" class="line" lang="plaintext">"tt":: Transmit Timestamp. String, interpreted as timestamp format.</span>
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<pre style="margin: 0;"> <span id="LC136" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC137" class="line" lang="plaintext">"nc":: Cycle-detection ID. String, interpreted as an IPv4 or IPv6 address.</span>
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<pre style="margin: 0;">+<span id="LC138" class="line" lang="plaintext"> Identifies the source host of the time update.</span>
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<pre style="margin: 0;">+<span id="LC139" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="plaintext">NTPv4 fields explicitly omitted from NTPv5 are version, reference ID,</span>
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="plaintext">origin timestamp, and reference timestamp. The reference ID field</span>
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<pre style="margin: 0;"> <span id="LC142" class="line" lang="plaintext">becomes the NTPv5 clock-type field.</span>
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<pre style="margin: 0;"> <span id="LC143" class="line" lang="plaintext"></span>
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141
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<pre style="margin: 0;">-<span id="LC141" class="line" lang="plaintext">//FIXME: How do we do the NTPv4 refid's anti-looping job?</span>
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<pre style="margin: 0;"> <span id="LC144" class="line" lang="plaintext">//FIXME: Daniel gets to make the case why poll and stratum are useless.</span>
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<pre style="margin: 0;"> <span id="LC145" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="plaintext">Additional NTPv5 fields:</span>
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