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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-32017] SockAddr incorrect sort order for IPv4</title>
                <link>https://jira.mongodb.org/browse/SERVER-32017</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;SockAddr::operator&amp;lt;(SockAddr) treats AF_INET SockAddr objects incorrectly and nonportably.&lt;br/&gt;
It orders by the uint32_t sin_addr.s_addr, which is in network byte order. On little-endian, this is major-sorting by LSB. On big-endian it would be correct by accident.&lt;/p&gt;

&lt;p&gt;AF_INET6 addresses have no integer equivalent are are correctly compared with network-order memcmp, MSB-first.&lt;/p&gt;

&lt;p&gt;So currently on LE machines, we have IPv4 sorted LSB-first, and IPv6 sorted MSB-first.&lt;br/&gt;
The obviously correct sorting should be MSB-first, so subnet addresses are grouped together, so we should change the sin_addr.s_addr comparison to a memcmp, or a comparison of the ntohl of these addresses.&lt;/p&gt;

&lt;p&gt;I&apos;m not aware of any production impact of this, but that&apos;s not saying much as I&apos;ve been here a month. &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;
</description>
                <environment></environment>
        <key id="460322">SERVER-32017</key>
            <summary>SockAddr incorrect sort order for IPv4</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Nov 2017 15:46:48 +0000</created>
                <updated>Mon, 30 Oct 2023 23:10:27 +0000</updated>
                            <resolved>Mon, 20 Nov 2017 16:19:42 +0000</resolved>
                                                    <fixVersion>3.7.1</fixVersion>
                                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1730416" author="xgen-internal-githook" created="Mon, 20 Nov 2017 16:19:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32017&quot; title=&quot;SockAddr incorrect sort order for IPv4&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32017&quot;&gt;&lt;del&gt;SERVER-32017&lt;/del&gt;&lt;/a&gt; remove SockAddr operator&amp;lt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/22f10748b1561f55cd053c9a1b3aba00b83adfc9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/22f10748b1561f55cd053c9a1b3aba00b83adfc9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1729108" author="billy.donahue" created="Fri, 17 Nov 2017 18:16:09 +0000"  >&lt;p&gt;Nobody calls this operator&amp;lt; anymore. Neither removing it nor =delete&apos;ing it cause any build failure.&lt;/p&gt;</comment>
                            <comment id="1728931" author="billy.donahue" created="Fri, 17 Nov 2017 16:18:11 +0000"  >&lt;p&gt;The operator was introduced at hash ab654fb9eda000661cde7f3273dac59fcd47caf8&lt;br/&gt;
Nov 17, 2007 (with incorrect handling of port numbers), tagged with 0.9.1.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ab654fb9eda000661cde7f3273dac59fcd47caf8#diff-fe83e7c8350e2fc00bc2021e76b1ec0aR49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ab654fb9eda000661cde7f3273dac59fcd47caf8#diff-fe83e7c8350e2fc00bc2021e76b1ec0aR49&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;EndPoint `operator&amp;lt;` depends on the order of its member SockAddr.&lt;br/&gt;
EndPoint were used as keys in a `std::map`.  `&lt;tt&gt;extern EndPointToPC pcMap&lt;/tt&gt;;`&lt;/p&gt;</comment>
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