2375 lines
120 KiB
HTML
2375 lines
120 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="Asciidoctor 2.0.23">
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<meta name="author" content="Brent Saner">
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<title>WireProto Specification</title>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700">
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<style>
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/*! Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
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/* Uncomment the following line when using as a custom stylesheet */
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/* @import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"; */
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html{font-family:sans-serif;-webkit-text-size-adjust:100%}
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strong strong{font-weight:400}
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</head>
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<body class="book toc2 toc-left">
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<div id="header">
|
|
<h1>WireProto Specification</h1>
|
|
<div class="details">
|
|
<span id="author" class="author">Brent Saner</span><br>
|
|
<span id="email" class="email"><a href="mailto:bts@square-r00t.net">bts@square-r00t.net</a></span><br>
|
|
<span id="revdate">Last rendered 2024-07-09 18:58:56 -0400</span>
|
|
</div>
|
|
<div id="toc" class="toc2">
|
|
<div id="toctitle">Table of Contents</div>
|
|
<ul class="sectlevel1">
|
|
<li><a href="#license">1. License</a></li>
|
|
<li><a href="#proto">2. Protocol</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#proto_reqresp">2.1. Requests/Responses</a></li>
|
|
<li><a href="#lib">2.2. Reference Library</a></li>
|
|
<li><a href="#ytho">2.3. Why Yet Another Message Format?</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#msg">3. Message Format</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#msg_respstatus">3.1. Response Status</a></li>
|
|
<li><a href="#proto_ver">3.2. Protocol Version</a></li>
|
|
<li><a href="#msg_grp">3.3. Record Group</a>
|
|
<ul class="sectlevel3">
|
|
<li><a href="#msg_grp_rec">3.3.1. Record</a>
|
|
<ul class="sectlevel4">
|
|
<li><a href="#msg_grp_rec_kv">3.3.1.1. Field/Value Pair (Key/Value Pair)</a>
|
|
<ul class="sectlevel5">
|
|
<li><a href="#msg_grp_rec_kv_nm">3.3.1.1.1. Field Name</a></li>
|
|
<li><a href="#msg_grp_rec_kv_val">3.3.1.1.2. Field Value</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#msg_grp_recresp">3.3.1.2. Copy of Original Record</a></li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#cksum">4. Checksums</a></li>
|
|
<li><a href="#hdrs">5. Headers</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#hdrs_respstart">5.1. <code>RESPSTART</code> Indicator</a></li>
|
|
<li><a href="#hdrs_cksum">5.2. <code>CKSUM</code> Header Prefix</a></li>
|
|
<li><a href="#hdrs_msgstart">5.3. <code>MSGSTART</code> Header Prefix</a></li>
|
|
<li><a href="#hdrs_bodystart">5.4. <code>BODYSTART</code> Header Prefix</a></li>
|
|
<li><a href="#hdrs_bodyend">5.5. <code>BODYEND</code> Sequence</a></li>
|
|
<li><a href="#hdrs_msgend">5.6. <code>MSGEND</code> Sequence</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#alloc">6. Allocators</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#alloc_cnt">6.1. Count Allocator</a></li>
|
|
<li><a href="#alloc_size">6.2. Size Allocator</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#ref">7. Reference Model and Examples</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#ref_single">7.1. Single/Simple</a>
|
|
<ul class="sectlevel3">
|
|
<li><a href="#ref_single_req">7.1.1. Single/Simple Request</a></li>
|
|
<li><a href="#ref_single_resp">7.1.2. Single/Simple Response</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#ref_multi">7.2. Multiple/Many/Complex</a>
|
|
<ul class="sectlevel3">
|
|
<li><a href="#ref_multi_req">7.2.1. Complex Request</a></li>
|
|
<li><a href="#ref_multi_resp">7.2.2. Complex Response</a></li>
|
|
</ul>
|
|
</li>
|
|
</ul>
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|
</li>
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</ul>
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</div>
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</div>
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|
<div id="content">
|
|
<div class="sect1">
|
|
<h2 id="license"><a class="link" href="#license">1. License</a></h2>
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|
<div class="sectionbody">
|
|
<!DOCTYPE html>
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|
<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>WireProto Specification License</title>
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<!-- <link rel="stylesheet" href="style.css"> -->
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<!-- <script src="script.js"></script> -->
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</head>
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<body>
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<p>
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|
<a property="dct:title"
|
|
rel="cc:attributionURL"
|
|
href="https://wireproto.io">
|
|
WireProto Specification
|
|
</a> by
|
|
<a rel="cc:attributionURL dct:creator"
|
|
property="cc:attributionName"
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href="https://r00t2.io">
|
|
Brent Saner
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</a> is licensed under:
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<br />
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<br />
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<a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
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style="display:inline-block;">
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Creative Commons Attribution-ShareAlike 4.0 International
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<p>
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<details>
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<summary>(License in full)</summary>
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<pre>
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Considerations for the public: By using one of our public
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later, or a BY-SA Compatible License.
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2. You must include the text of, or the URI or hyperlink to, the
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Adapter's License You apply. You may satisfy this condition
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in any reasonable manner based on the medium, means, and
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context in which You Share Adapted Material.
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3. You may not offer or impose any additional or different terms
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or conditions on, or apply any Effective Technological
|
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Measures to, Adapted Material that restrict exercise of the
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rights granted under the Adapter's License You apply.
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Section 4 -- Sui Generis Database Rights.
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Where the Licensed Rights include Sui Generis Database Rights that
|
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apply to Your use of the Licensed Material:
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a. for the avoidance of doubt, Section 2(a)(1) grants You the right
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to extract, reuse, reproduce, and Share all or a substantial
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portion of the contents of the database;
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b. if You include all or a substantial portion of the database
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contents in a database in which You have Sui Generis Database
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Rights, then the database in which You have Sui Generis Database
|
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Rights (but not its individual contents) is Adapted Material,
|
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including for purposes of Section 3(b); and
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c. You must comply with the conditions in Section 3(a) if You Share
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all or a substantial portion of the contents of the database.
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For the avoidance of doubt, this Section 4 supplements and does not
|
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replace Your obligations under this Public License where the Licensed
|
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Rights include other Copyright and Similar Rights.
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Section 5 -- Disclaimer of Warranties and Limitation of Liability.
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a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
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EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
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AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
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ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
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IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
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WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
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PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
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ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
|
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KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
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ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
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b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
|
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TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
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NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
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INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
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COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
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USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
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ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
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DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
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IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
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|
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c. The disclaimer of warranties and limitation of liability provided
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above shall be interpreted in a manner that, to the extent
|
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possible, most closely approximates an absolute disclaimer and
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waiver of all liability.
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Section 6 -- Term and Termination.
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a. This Public License applies for the term of the Copyright and
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Similar Rights licensed here. However, if You fail to comply with
|
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this Public License, then Your rights under this Public License
|
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terminate automatically.
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|
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b. Where Your right to use the Licensed Material has terminated under
|
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Section 6(a), it reinstates:
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1. automatically as of the date the violation is cured, provided
|
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it is cured within 30 days of Your discovery of the
|
|
violation; or
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|
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2. upon express reinstatement by the Licensor.
|
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|
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For the avoidance of doubt, this Section 6(b) does not affect any
|
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right the Licensor may have to seek remedies for Your violations
|
|
of this Public License.
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c. For the avoidance of doubt, the Licensor may also offer the
|
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Licensed Material under separate terms or conditions or stop
|
|
distributing the Licensed Material at any time; however, doing so
|
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will not terminate this Public License.
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d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
|
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License.
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Section 7 -- Other Terms and Conditions.
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|
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a. The Licensor shall not be bound by any additional or different
|
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terms or conditions communicated by You unless expressly agreed.
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b. Any arrangements, understandings, or agreements regarding the
|
|
Licensed Material not stated herein are separate from and
|
|
independent of the terms and conditions of this Public License.
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|
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Section 8 -- Interpretation.
|
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|
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a. For the avoidance of doubt, this Public License does not, and
|
|
shall not be interpreted to, reduce, limit, restrict, or impose
|
|
conditions on any use of the Licensed Material that could lawfully
|
|
be made without permission under this Public License.
|
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|
|
b. To the extent possible, if any provision of this Public License is
|
|
deemed unenforceable, it shall be automatically reformed to the
|
|
minimum extent necessary to make it enforceable. If the provision
|
|
cannot be reformed, it shall be severed from this Public License
|
|
without affecting the enforceability of the remaining terms and
|
|
conditions.
|
|
|
|
c. No term or condition of this Public License will be waived and no
|
|
failure to comply consented to unless expressly agreed to by the
|
|
Licensor.
|
|
|
|
d. Nothing in this Public License constitutes or may be interpreted
|
|
as a limitation upon, or waiver of, any privileges and immunities
|
|
that apply to the Licensor or You, including from the legal
|
|
processes of any jurisdiction or authority.
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=======================================================================
|
|
|
|
Creative Commons is not a party to its public
|
|
licenses. Notwithstanding, Creative Commons may elect to apply one of
|
|
its public licenses to material it publishes and in those instances
|
|
will be considered the “Licensor.” The text of the Creative Commons
|
|
public licenses is dedicated to the public domain under the CC0 Public
|
|
Domain Dedication. Except for the limited purpose of indicating that
|
|
material is shared under a Creative Commons public license or as
|
|
otherwise permitted by the Creative Commons policies published at
|
|
creativecommons.org/policies, Creative Commons does not authorize the
|
|
use of the trademark "Creative Commons" or any other trademark or logo
|
|
of Creative Commons without its prior written consent including,
|
|
without limitation, in connection with any unauthorized modifications
|
|
to any of its public licenses or any other arrangements,
|
|
understandings, or agreements concerning use of licensed material. For
|
|
the avoidance of doubt, this paragraph does not form part of the
|
|
public licenses.
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|
|
|
Creative Commons may be contacted at creativecommons.org.
|
|
</pre>
|
|
</details>
|
|
</p>
|
|
</body>
|
|
</html>
|
|
<div class="paragraph">
|
|
<p>In a nutshell, this means any may:</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>Use it in commercial/proprietary/internal works…​</p>
|
|
</li>
|
|
<li>
|
|
<p>Expand upon/change the specification…​</p>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>(As long as it is released under the same Creative Commons license)</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>As long as you attribute the original (this document). This can be as simple as something like:</p>
|
|
</div>
|
|
<div class="exampleblock">
|
|
<div class="content">
|
|
<div class="paragraph">
|
|
<p>Based on WireProto version <protocol version> as found at <a href="https://wireproto.io/" class="bare">https://wireproto.io/</a>.</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>More details certainly helps, though; you may want to mention the exact date you "forked" it, etc.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Please see the full text as collapsed above or <a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en" target="_blank" rel="noopener">the online version</a> of the license for full legal copy.</p>
|
|
</div>
|
|
<div class="admonitionblock note">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">
|
|
In the event of the embedded text in this document differing from the online version, the online version is assumed to take precedence as the valid license applicable to this work.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="proto"><a class="link" href="#proto">2. Protocol</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>The WireProto data packing API is a custom wire protocol//message format designed for incredibly performant, unambiguous, predictable, platform-agnostic, implementation-agnostic communication. It is based heavily on the <a href="https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key" target="_blank" rel="noopener">OpenSSH "v1" key format</a> <a href="https://git.r00t2.io/r00t2/go_sshkeys/src/branch/master/_ref/KEY_GUIDE.html#v1_plain_2">(example/details)</a> packing method.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It supports arbitrary binary values, which means they can be anything according to the implementation-specific details; a common practice is to encode ("marshal") a Go struct to JSON bytes, and set that as a WireProto field’s value.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It supports both static construction/parsing/dissection and stream approaches in a single format, as well as multiple commands per request message/multiple answers per response message.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><strong>All</strong> packed uint32 (<em>unsigned 32-bit integer</em>) values are a <a href="https://en.wikipedia.org/wiki/Endianness" target="_blank" rel="noopener">big-endian</a> 4-byte sequence (e.g. <code>3712599402</code> == <code>0xdd49c56a</code>, or [<code>0xdd</code>, <code>0x49</code>, <code>0xc5</code>, <code>0x6a</code>]).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>This specification’s <a href="#proto_ver">Protocol Version</a> is <code>1</code> (<code>0x00000001</code>).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>For other releases/finalized versions of this specification, see <a href="https://git.r00t2.io/r00t2/WireProto/tags" target="_blank" rel="noopener">here</a>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>For in-development versions, drafts, etc. of this specification, see <a href="https://git.r00t2.io/r00t2/WireProto/branches" target="_blank" rel="noopener">here</a>.</p>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="proto_reqresp"><a class="link" href="#proto_reqresp">2.1. Requests/Responses</a></h3>
|
|
<div class="paragraph">
|
|
<p>WireProto indicates two types of Messages/communication ends: a <em>Requester</em> (<em>Requesting End</em>) and a <em>Responder</em> (<em>Responding End</em>).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>This terminology is intentionally implementation-agnostic. A <em>Requester</em> is any end of a communication that is <strong>requesting data</strong>, and the <em>Responder</em> is any end of a communication that is <strong>providing that data</strong>. A Responder may not always be present (e.g. in the case of using WireProto for local disk serialization/caching, etc.), and a "client" may be a Requester, Responder, or both — likewise for a "server".</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="lib"><a class="link" href="#lib">2.2. Reference Library</a></h3>
|
|
<div class="paragraph">
|
|
<p>The WireProto specification is accompanied by a reference library for Golang, <a href="https://git.r00t2.io/r00t2/go_wireproto" target="_blank" rel="noopener">"WireProto"</a> (<a href="https://git.r00t2.io/r00t2/wireproto" target="_blank" rel="noopener"><em>source</em></a>):</p>
|
|
</div>
|
|
<br />
|
|
<br />
|
|
<a href="https://pkg.go.dev/go.pkg.dev/r00t2.io/wireproto">
|
|
<img src="https://pkg.go.dev/badge/go.pkg.dev/r00t2.io/wireproto.svg"
|
|
alt="Go Reference">
|
|
</a>
|
|
<br />
|
|
<br />
|
|
<div class="paragraph">
|
|
<p>Additional reference libraries may be available in the future.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="ytho"><a class="link" href="#ytho">2.3. Why Yet Another Message Format?</a></h3>
|
|
<div class="paragraph">
|
|
<p>Because existing methods of serializing data in a structured way (e.g. JSON, XML, YAML) are slow/bloaty, inaccurate, and/or inflexible. They struggle with binary or abritrary data (or in e.g. XML’s case requiring intermediate conditional encoding/decoding).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>If it can be represented as bytes (which all digital data can), WireProto can send and receive it.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Additionally:</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p><a href="https://protobuf.dev/" target="_blank" rel="noopener"><strong>Protobuf</strong></a> has performance issues (yes, really; protobufs have large overhead compared to WireProto) and is restrictive on data types for future-proofing.</p>
|
|
</li>
|
|
<li>
|
|
<p><a href="https://go.dev/blog/gob" target="_blank" rel="noopener"><strong>Gob</strong></a> is very language-limiting and does not support e.g. nil pointers and cyclical values.</p>
|
|
</li>
|
|
<li>
|
|
<p><a href="https://capnproto.org/" target="_blank" rel="noopener">Cap’n Proto</a> has wide language support and excellent performance but is terribly non-idiomatic, requiring the code to be generated from the schema and not vice versa (which is only ideal if you have only one communication interface and is, in the author’s opinion, the entirely incorrect approach).</p>
|
|
</li>
|
|
<li>
|
|
<p><a href="https://en.wikipedia.org/wiki/JSON_streaming" target="_blank" rel="noopener">JSON streams</a> have no delimiters defined which makes it an inconvenience if using a parser that does not know when the message ends/is complete, or if it is expecting a standalone JSON object (e.g. native vanilla Golang JSON parsing).</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="admonitionblock tip">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Tip</div>
|
|
</td>
|
|
<td class="content">
|
|
<div class="paragraph">
|
|
<p>WireProto is only used for binary packing/unpacking; this means it can be used with any e.g. <a href="https://pkg.go.dev/net#Conn" target="_blank" rel="noopener"><code>net.Conn</code></a> (and even has helper functions explicitly to facilitate this), storage on-disk, etc.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>As such it is transport/storage-agnostic, and can be used with a <a href="https://pkg.go.dev/net#Dial" target="_blank" rel="noopener">TCP socket, UDP socket, IPC (InterProcess Communication)/UDS (UNIX Domain Socket) handle,</a> <a href="https://pkg.go.dev/crypto/tls#Dial" target="_blank" rel="noopener">TLS-tunneled TCP socket</a>, etc.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>See the <a href="#lib">Reference Library</a> for details.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="msg"><a class="link" href="#msg">3. Message Format</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="admonitionblock tip">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Tip</div>
|
|
</td>
|
|
<td class="content">
|
|
<div class="paragraph">
|
|
<p>Throughout this document, you may see references to things like <code>LF</code>, <code>SOH</code>, and so forth.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>These refer to <em>ASCII control characters</em>. You will also see many values represented in hex.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>You can find more details about this (along with a full ASCII reference) <a href="https://square-r00t.net/ascii.html" target="_blank" rel="noopener">here</a>. Note that the specification fully supports UTF-8 (or any other arbitrary encoding) — just be sure that your <a href="#alloc_size">size allocators</a> are aligned to the <strong>byte count</strong> and not <strong>character count</strong> (as these may not be equal depending on encoding).</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Each <strong>message</strong> is composed of:</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>The <a href="#msg_respstatus">Response Status</a><sup class="footnote" id="_footnote_responly">[<a id="_footnoteref_1" class="footnote" href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#cksum">Checksum</a><sup class="footnote" id="_footnote_optreq">[<a id="_footnoteref_2" class="footnote" href="#_footnotedef_2" title="View footnote.">2</a>]</sup><sup class="footnote" id="_footnote_reqresp">[<a id="_footnoteref_3" class="footnote" href="#_footnotedef_3" title="View footnote.">3</a>]</sup></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#hdrs_msgstart"><code>MSGSTART</code> Header Prefix</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#proto_ver">Protocol Version</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#hdrs_bodystart"><code>BODYSTART</code> Header Prefix</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#msg_grp">Record Group</a> <a href="#alloc_cnt">Count Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#msg_grp">Record Group</a> <a href="#alloc_size">Size Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p>One (or more) <a href="#msg_grp">Record Group</a>(s), each of which contain:</p>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>One (or more) <a href="#msg_grp_rec">Record</a>(s), each of which contain:</p>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>One (or more) <a href="#msg_grp_rec_kv">Field/Value pair</a>(s), each of which contain:</p>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>A <a href="#msg_grp_rec_kv_nm">Field Name</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#msg_grp_rec_kv_val">Field Value</a></p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#msg_grp_recresp">copy of the original record</a><sup class="footnoteref">[<a class="footnote" href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#hdrs_bodyend"><code>BODYEND</code> Sequence</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A <a href="#hdrs_msgend"><code>MSGEND</code> Sequence</a></p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="msg_respstatus"><a class="link" href="#msg_respstatus">3.1. Response Status</a></h3>
|
|
<div class="paragraph">
|
|
<p>For response messages, a speciall "summary byte" is prepended; a status indicator.
|
|
This allows requesting ends to quickly bail in the case of an error if no further parsing is desired.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>The status will be indicated by one of <a href="#hdrs_respstart">two values</a>: an ASCII <code>ACK</code> (<code>0x06</code>) for all requests being returned successfully or an ASCII <code>NAK</code> (<code>0x15</code>) if one or more errors were encountered across all records.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="proto_ver"><a class="link" href="#proto_ver">3.2. Protocol Version</a></h3>
|
|
<div class="paragraph">
|
|
<p>The protocol version is a packed uint32 that denotes which version of this protocol specification is being used.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is maintained seperately from the <strong>library</strong> version/repo tags.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>The current protocol version (as demonstrated in this document) is <code>1</code> (<code>0x00000001</code>).</p>
|
|
</div>
|
|
<div class="admonitionblock note">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">
|
|
Version <code>0</code> is reserved for current <code>HEAD</code> of the <code>master</code> branch of this specification and should be considered experimental, not conforming to any specific protocol message format version.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="msg_grp"><a class="link" href="#msg_grp">3.3. Record Group</a></h3>
|
|
<div class="paragraph">
|
|
<p>A record group contains multiple related <a href="#msg_grp_rec">Records</a>. It is common to only have a single Record Group.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Its structure is:</p>
|
|
</div>
|
|
<div class="olist arabic">
|
|
<ol class="arabic">
|
|
<li>
|
|
<p><a href="#msg_grp_rec">Record</a> <a href="#alloc_cnt">Count Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p><a href="#msg_grp_rec">Record</a> <a href="#alloc_size">Size Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p>One (or more) <a href="#msg_grp_rec">Records</a></p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
<div class="sect3">
|
|
<h4 id="msg_grp_rec"><a class="link" href="#msg_grp_rec">3.3.1. Record</a></h4>
|
|
<div class="paragraph">
|
|
<p>A record contains multiple related <a href="#msg_grp_rec_kv">Field/Value Pairs (FVP)</a> and, if a Response Record, a copy of the original reference Request Record it is responding to.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Its structure is:</p>
|
|
</div>
|
|
<div class="olist arabic">
|
|
<ol class="arabic">
|
|
<li>
|
|
<p><a href="#msg_grp_rec_kv">Field/Value Pair (Key/Value Pair)</a> <a href="#alloc_cnt">Count Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p><a href="#msg_grp_rec_kv">Field/Value Pair (Key/Value Pair)</a> <a href="#alloc_size">Size Allocator</a></p>
|
|
<div class="olist loweralpha">
|
|
<ol class="loweralpha" type="a">
|
|
<li>
|
|
<p>One (or more) <a href="#msg_grp_rec_kv">Field/Value Pairs</a></p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
</li>
|
|
<li>
|
|
<p><a href="#msg_grp_recresp">Copy of Original Record</a> <a href="#alloc_size">Size Allocator</a><sup class="footnoteref">[<a class="footnote" href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
<div class="sect4">
|
|
<h5 id="msg_grp_rec_kv"><a class="link" href="#msg_grp_rec_kv">3.3.1.1. Field/Value Pair (Key/Value Pair)</a></h5>
|
|
<div class="paragraph">
|
|
<p>A field/value pair (also referred to as a key/value pair) contains a matched <a href="#msg_grp_rec_kv_nm">Field Name</a> and its <a href="#msg_grp_rec_kv_val">Field Value</a>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Its structure is:</p>
|
|
</div>
|
|
<div class="olist arabic">
|
|
<ol class="arabic">
|
|
<li>
|
|
<p><a href="#msg_grp_rec_kv_nm">Field Name</a> <a href="#alloc_size">Size Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p><a href="#msg_grp_rec_kv_val">Field Value</a> <a href="#alloc_size">Size Allocator</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A single <a href="#msg_grp_rec_kv_nm">Field Name</a></p>
|
|
</li>
|
|
<li>
|
|
<p>A single matching <a href="#msg_grp_rec_kv_val">Field Value</a></p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
<div class="admonitionblock important">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Important</div>
|
|
</td>
|
|
<td class="content">
|
|
<div class="paragraph">
|
|
<p>Unlike most/all other <a href="#alloc">Allocators</a> for other sections/levels, the field name and value allocators are consecutive <a href="#alloc_size">Size Allocators</a>! This is because there is <strong>only one</strong> field name and value per <a href="#msg_grp_rec">Record</a>.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="sect5">
|
|
<h6 id="msg_grp_rec_kv_nm"><a class="link" href="#msg_grp_rec_kv_nm">3.3.1.1.1. Field Name</a></h6>
|
|
<div class="paragraph">
|
|
<p>The field name is usually from a finite set of allowed names. The <a href="#msg_grp_rec_kv_val">Field Value</a>, while written as bytes, often contains data defined by the field name. (That is, the parsing of <a href="#msg_grp_rec_kv_val">Field Value</a> often depends on its Field Name.) It is recommended that the field name be a UTF-8-compatible string for simplified serializing and <a href="https://www.wireshark.org/" target="_blank" rel="noopener">on-the-wire debugging</a>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>While there is no technical requirement that a field name be unique per-<a href="#msg_grp_rec">Record</a>, it is generally recommended (unless emulating/encoding arrays of data in separate <a href="#msg_grp_rec_kv">field/value pairs</a>).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Its structure is:</p>
|
|
</div>
|
|
<div class="olist arabic">
|
|
<ol class="arabic">
|
|
<li>
|
|
<p>A name/identifier in bytes</p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
</div>
|
|
<div class="sect5">
|
|
<h6 id="msg_grp_rec_kv_val"><a class="link" href="#msg_grp_rec_kv_val">3.3.1.1.2. Field Value</a></h6>
|
|
<div class="paragraph">
|
|
<p>A field’s value is, on the wire, just a series of bytes. The actual content of those bytes, including any structure or encoding, is likely to/probably depends on the paired <a href="#msg_grp_rec_kv_nm">Field Name</a>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Its structure is:</p>
|
|
</div>
|
|
<div class="olist arabic">
|
|
<ol class="arabic">
|
|
<li>
|
|
<p>A value in bytes</p>
|
|
</li>
|
|
</ol>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect4">
|
|
<h5 id="msg_grp_recresp"><a class="link" href="#msg_grp_recresp">3.3.1.2. Copy of Original Record</a></h5>
|
|
<div class="paragraph">
|
|
<p>This contains a "copy" of the original/request’s <a href="#msg_grp_rec">Record</a> that this record is in response to. It is only present in Response message and must not be included in Request messages.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is a complete <a href="#msg_grp_rec">Record</a> from the request embedded inside the responding Record.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>For example, if a record contains multiple <a href="#msg_grp_rec_kv">field/value pairs</a> specifying a query of some data then the response record will contain a copy of that record’s query data.</p>
|
|
</div>
|
|
<div class="admonitionblock note">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">
|
|
<div class="paragraph">
|
|
<p>While <strong>not recommended</strong>, it <strong>is</strong> within specification/permissible to "alias" a request record via a session-unique identifier (e.g. <a href="https://datatracker.ietf.org/doc/html/rfc4122" target="_blank" rel="noopener">UUIDv4</a>), <strong>provided</strong> the promise that the requesting end retains an identifiable copy of/can lookup or associate its original record based on that identifying alias.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>For example, a requesting end may specify <em>its own</em> provided identifier as an <a href="#msg_grp_rec_kv">field/value pair</a> (e.g. <code>identifier:f18231973d08417e877dd1a2f8e8ab74</code>) along with additional data. The returning Response Record may then include <strong>only</strong> an original/request record with an FVP of <code>identifier:f18231973d08417e877dd1a2f8e8ab74</code> along with the requested data.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Alternatively for another example, a responding end may return a Response Record with an original/request record of a single FVP such as <code>ref_id:46823da27f8749df9dee8f0bded8cce9</code> or the like. The requesting end <strong>must</strong> then be able to retrieve the full copy of the original request record as a standalone Response Record based on that <code>ref_id</code>. Responding ends <strong>may</strong> enforce lifetimes for request record lookup in this case but they must be promised.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="cksum"><a class="link" href="#cksum">4. Checksums</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>Checksums are optional for the requesting end but the responding end <strong>must</strong> send them. <strong>If present</strong> in the request, the responder <strong>must</strong> validate to ensure the checksum matches the message body (<a href="#hdrs_bodystart"><code>BODYSTART</code> Header Prefix</a> to <a href="#hdrs_bodyend"><code>BODYEND</code> Sequence</a>, inclusive). If the checksum does not match, an error <strong>must</strong> be returned.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>They are represented as a big-endian-packed uint32.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>The checksum must be prefixed with a <a href="#hdrs_cksum"><code>CKSUM</code> Header Prefix</a>. If no checksum is provided in a request, this prefix <strong>must not</strong> be included in the sequence.</p>
|
|
</div>
|
|
<div class="admonitionblock tip">
|
|
<table>
|
|
<tr>
|
|
<td class="icon">
|
|
<div class="title">Tip</div>
|
|
</td>
|
|
<td class="content">
|
|
<div class="paragraph">
|
|
<p>A responder can quickly check if a checksum is present by checking the first byte in requests. If it is <a href="#hdrs_cksum"><code>CKSUM</code></a>, a checksum is provided. If it is <a href="#hdrs_msgstart"><code>MSGSTART</code></a>, one was <strong>not</strong> provided.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>The checksum method used is the <a href="https://users.ece.cmu.edu/~koopman/crc/crc32.html" target="_blank" rel="noopener">IEEE 802.3 CRC-32</a>, which should be natively available for all/most implementations/languages as it is perhaps the most ubiquitous of CRC-32 variants (e.g. <a href="https://docs.python.org/3/library/zlib.html#zlib.crc32" target="_blank" rel="noopener">Python</a>, <a href="https://pkg.go.dev/hash/crc32" target="_blank" rel="noopener">Golang</a>, <a href="https://github.com/gcc-mirror/gcc/blob/master/libiberty/crc32.c" target="_blank" rel="noopener">GNU C/glibc</a>(?), <a href="https://crates.io/keywords/crc32" target="_blank" rel="noopener">Rust</a>, etc.). (Polynomial <code>0x04c11db7</code>, reversed polynomial <code>0xedb88320</code>.)</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>If one needs to implement the appropriate CRC32 implementation, there is extensive detail at the <a href="https://en.wikipedia.org/wiki/Cyclic_redundancy_check" target="_blank" rel="noopener">CRC Wikipedia article</a>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>To confirm the correct CRC32 implementation is being used (as there are <strong>many</strong> "CRC-32" algorithms/methods/functions/libraries), the following validations may be used:</p>
|
|
</div>
|
|
<table class="tableblock frame-all grid-all stretch">
|
|
<caption class="title">Table 1. CRC-32 Validations</caption>
|
|
<colgroup>
|
|
<col style="width: 20%;">
|
|
<col style="width: 30%;">
|
|
<col style="width: 10%;">
|
|
<col style="width: 20%;">
|
|
<col style="width: 20%;">
|
|
</colgroup>
|
|
<thead>
|
|
<tr>
|
|
<th class="tableblock halign-center valign-middle">String</th>
|
|
<th class="tableblock halign-center valign-middle">Bytes</th>
|
|
<th class="tableblock halign-center valign-middle">Checksum (integer)</th>
|
|
<th class="tableblock halign-center valign-middle">Checksum (bytes, little-endian)</th>
|
|
<th class="tableblock halign-center valign-middle">Checksum (bytes, big-endian)</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>WireProto</code></p></td>
|
|
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>0x5769726550726f746f</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>815806352</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0x30a03790</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0x9037a030</code></p></td>
|
|
</tr>
|
|
<tr>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>FooBarBazQuux</code></p></td>
|
|
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>0x466f6f42617242617a51757578</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>983022564</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0xe4bb973a</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0x3a97bbe4</code></p></td>
|
|
</tr>
|
|
<tr>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0123456789abcdef</code></p></td>
|
|
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>0x30313233343536373839616263646566</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>1757737011</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0x33f0c468</code></p></td>
|
|
<td class="tableblock halign-center valign-middle"><p class="tableblock"><code>0x68c4f033</code></p></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="hdrs"><a class="link" href="#hdrs">5. Headers</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>Certain sections are wrapped with an identifying header. Those headers are included below for reference.</p>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_respstart"><a class="link" href="#hdrs_respstart">5.1. <code>RESPSTART</code> Indicator</a></h3>
|
|
<div class="paragraph">
|
|
<p>Responses have a <a href="#msg_respstatus">Response Status</a>.<sup class="footnoteref">[<a class="footnote" href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is either an <code>ACK</code> (<code>0x06</code>) or <code>NAK</code> (<code>0x15</code>).</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_cksum"><a class="link" href="#hdrs_cksum">5.2. <code>CKSUM</code> Header Prefix</a></h3>
|
|
<div class="paragraph">
|
|
<p>A <a href="#cksum">checksum</a>, if provided<sup class="footnoteref">[<a class="footnote" href="#_footnotedef_2" title="View footnote.">2</a>]</sup><sup class="footnoteref">[<a class="footnote" href="#_footnotedef_3" title="View footnote.">3</a>]</sup>, will have a prefix header of <code>ESC</code> (<code>0x1b</code>).</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_msgstart"><a class="link" href="#hdrs_msgstart">5.3. <code>MSGSTART</code> Header Prefix</a></h3>
|
|
<div class="paragraph">
|
|
<p>The message start header indicates a start of a "message". It is used to delineate operational headers from specification information (e.g. <a href="#proto_ver">Protocol Version</a>) and data.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is an <code>SOH</code> (<code>0x01</code>).</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_bodystart"><a class="link" href="#hdrs_bodystart">5.4. <code>BODYSTART</code> Header Prefix</a></h3>
|
|
<div class="paragraph">
|
|
<p>The body start header indicates that data/records follow. All bytes between <code>BODYSTART</code> and <a href="#hdrs_bodyend"><code>BODYEND</code></a> are to be assumed to be directly pertinent to the request/response rather than operational.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is an <code>STX</code> (<code>0x02</code>).</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_bodyend"><a class="link" href="#hdrs_bodyend">5.5. <code>BODYEND</code> Sequence</a></h3>
|
|
<div class="paragraph">
|
|
<p>The body end prefix indicates the end of data/records. All bytes between <a href="#hdrs_bodystart"><code>BODYSTART</code></a> and <code>BODYEND</code> are to be assumed to be directly pertinent to the request/response rather than operational.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is an <code>ETX</code> (<code>0x03</code>).</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="hdrs_msgend"><a class="link" href="#hdrs_msgend">5.6. <code>MSGEND</code> Sequence</a></h3>
|
|
<div class="paragraph">
|
|
<p>The message end prefix indicates that a message in its entirety has ended, and if no further communication is necessary per implementation the connection may be disconnected.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>It is an <code>EOT</code> (<code>0x04</code>).</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="alloc"><a class="link" href="#alloc">6. Allocators</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>There are two type of allocators included for each following sequence of bytes: <code>count allocators</code> and <code>size allocators</code>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><a href="#alloc_size">Size allocators</a> can be used by receiving ends to efficiently pre-allocate buffers and for sending ends to indicate the amount of remaining data expected.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>They are usually preceded with a <a href="#alloc_cnt">count allocator</a> to allow for pre-allocating e.g. slice/array sizes, but not always (e.g. <a href="#msg_grp_rec_kv">field/value pairs</a> have two <a href="#alloc_size">size allocators</a>).</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>All allocators are unsigned 32-bit integers, big-endian-packed.</p>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="alloc_cnt"><a class="link" href="#alloc_cnt">6.1. Count Allocator</a></h3>
|
|
<div class="paragraph">
|
|
<p>Count allocators indicate <strong>how many</strong> children objects are contained.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="alloc_size"><a class="link" href="#alloc_size">6.2. Size Allocator</a></h3>
|
|
<div class="paragraph">
|
|
<p>Size allocators indicate <strong>how much</strong> (in bytes) all children objects are combined as one block. They include the allocators themselves of child objects, etc. as well.</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="ref"><a class="link" href="#ref">7. Reference Model and Examples</a></h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>For a more visual explanation, given the following e.g. Golang structs from the <a href="#lib">Reference Library</a> (<code>wireproto.Request{}</code> and <code>wireproto.Response{}</code>):</p>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="ref_single"><a class="link" href="#ref_single">7.1. Single/Simple</a></h3>
|
|
<div class="sect3">
|
|
<h4 id="ref_single_req"><a class="link" href="#ref_single_req">7.1.1. Single/Simple Request</a></h4>
|
|
<details>
|
|
<summary class="title">Example Message Structure (Simple Request)</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="go"><span class="k">package</span> <span class="n">wireproto</span>
|
|
|
|
<span class="k">var</span> <span class="p">(</span>
|
|
<span class="c">// REQUEST (Simple)</span>
|
|
<span class="n">testSimpleReq</span> <span class="o">*</span><span class="n">Request</span> <span class="o">=</span> <span class="o">&</span><span class="n">Request</span><span class="p">{</span>
|
|
<span class="n">ProtocolVersion</span><span class="o">:</span> <span class="n">ProtoVersion</span><span class="p">,</span>
|
|
<span class="n">RecordGroups</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">RequestRecordGroup</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">RequestRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"field1"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"value1"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"field2"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"value2"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">}</span>
|
|
<span class="p">)</span></code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Would then serialize as (in hex):</p>
|
|
</div>
|
|
<details>
|
|
<summary class="title">Annotated Hex</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">// REQUEST (Simple)
|
|
-------- // (No Checksum Present)
|
|
01 // HDR:MSGSTART
|
|
00000001 // Protocol Version (1)
|
|
02 // HDR:BODYSTART
|
|
00000001 // Record Group Count (1)
|
|
00000038 // Record Groups Size (56)
|
|
// Record Group 1 (56 bytes)
|
|
00000001 // Record Count (1)
|
|
00000030 // Record Group Size (48)
|
|
// Record Group 1, Record 1 (48 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000028 // Record Size (40)
|
|
// Record Group 1, Record 1, Field/Value 1 (20 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000006 // Field Value Size (6)
|
|
6669656c6431 // "field1"
|
|
76616c756531 // "value1"
|
|
// Record Group 1, Record 1, Field/Value 2 (20 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000006 // Field Value Size (6)
|
|
6669656c6432 // "field2"
|
|
76616c756532 // "value2"
|
|
03 // HDR:BODYEND
|
|
04 // HDR:MSGEND</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Or, non-annotated:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">01000000010200000001000000380000000100000030000000020000002800000006000000066669
|
|
656c643176616c75653100000006000000066669656c643276616c7565320304</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect3">
|
|
<h4 id="ref_single_resp"><a class="link" href="#ref_single_resp">7.1.2. Single/Simple Response</a></h4>
|
|
<details>
|
|
<summary class="title">Example Message Structure (Simple Response)</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="go"><span class="k">package</span> <span class="n">wireproto</span>
|
|
|
|
<span class="k">var</span> <span class="p">(</span>
|
|
<span class="c">// RESPONSE (Simple)</span>
|
|
<span class="n">testSimpleResp</span> <span class="o">*</span><span class="n">Response</span> <span class="o">=</span> <span class="o">&</span><span class="n">Response</span><span class="p">{</span>
|
|
<span class="n">Status</span><span class="o">:</span> <span class="n">AsciiACK</span><span class="p">,</span>
|
|
<span class="n">Checksum</span><span class="o">:</span> <span class="m">3472688928</span><span class="p">,</span> <span class="c">// 0xcefd0720</span>
|
|
<span class="n">ProtocolVersion</span><span class="o">:</span> <span class="n">ProtoVersion</span><span class="p">,</span>
|
|
<span class="n">RecordGroups</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">ResponseRecordGroup</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">ResponseRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"data1"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"<arbitrary data>"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="n">OriginalRecord</span><span class="o">:</span> <span class="n">testSimpleReq</span><span class="o">.</span><span class="n">RecordGroups</span><span class="p">[</span><span class="m">0</span><span class="p">]</span><span class="o">.</span><span class="n">Records</span><span class="p">[</span><span class="m">0</span><span class="p">],</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">}</span>
|
|
<span class="p">)</span></code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Would then serialize as (in hex):</p>
|
|
</div>
|
|
<details>
|
|
<summary class="title">Annotated Hex</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">// RESPONSE (Simple)
|
|
06 // HDR:RESPSTART (Status: OK)
|
|
1b // HDR:CKSUM
|
|
cefd0720 // Checksum Value (3472688928)
|
|
01 // HDR:MSGSTART
|
|
00000001 // Protocol Version (1)
|
|
02 // HDR:BODYSTART
|
|
00000001 // Record Group Count (1)
|
|
00000061 // Record Groups Size (97)
|
|
// Record Group 1 (97)
|
|
00000001 // Record Count (1)
|
|
00000059 // Record Group Size (89)
|
|
// Record Group 1, Record 1 (89 bytes)
|
|
00000001 // Field/Value Count (1)
|
|
0000001d // Record Size (29)
|
|
00000030 // Request Record Size (48)
|
|
// Record Group 1, Record 1, Field/Value 1 (29 bytes)
|
|
00000005 // Field Name Size (5)
|
|
00000010 // Field Value Size (16)
|
|
6461746131 // "data1"
|
|
3c6172626974726172792064 // "<arbitrary data>"
|
|
6174613e
|
|
// Record Group 1, Record 1 (REQUEST RECORD) (48 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000028 // Record Size (40)
|
|
// Record Group 1, Record 1, Field/Value 1 (20 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000006 // Field Value Size (6)
|
|
6669656c6431 // "field1"
|
|
76616c756531 // "value1"
|
|
// Record Group 1, Record 1, Field/Value 2 (20 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000006 // Field Value Size (6)
|
|
6669656c6432 // "field2"
|
|
76616c756532 // "value2"
|
|
03 // HDR:BODYEND
|
|
04 // HDR:MSGEND</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Or, non-annotated:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">061bcefd072001000000010200000001000000610000000100000059000000010000001d00000030
|
|
000000050000001064617461313c61726269747261727920646174613e0000000200000028000000
|
|
06000000066669656c643176616c75653100000006000000066669656c643276616c7565320304</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="ref_multi"><a class="link" href="#ref_multi">7.2. Multiple/Many/Complex</a></h3>
|
|
<div class="paragraph">
|
|
<p>Multiple records, record groups, etc. can be specified in one message.</p>
|
|
</div>
|
|
<div class="sect3">
|
|
<h4 id="ref_multi_req"><a class="link" href="#ref_multi_req">7.2.1. Complex Request</a></h4>
|
|
<details>
|
|
<summary class="title">Example Message Structure (Multiple/Many Requests, Single Message)</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="go"><span class="k">package</span> <span class="n">wireproto</span>
|
|
|
|
<span class="k">var</span> <span class="p">(</span>
|
|
<span class="c">// REQUEST (Complex)</span>
|
|
<span class="n">testMultiReq</span> <span class="o">*</span><span class="n">Request</span> <span class="o">=</span> <span class="o">&</span><span class="n">Request</span><span class="p">{</span>
|
|
<span class="n">ProtocolVersion</span><span class="o">:</span> <span class="n">ProtoVersion</span><span class="p">,</span>
|
|
<span class="n">RecordGroups</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">RequestRecordGroup</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">RequestRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldA1A"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueA1A"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldA1B"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueA1B"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldA2A"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueA2A"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldA2B"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueA2B"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">RequestRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldB1A"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueB1A"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldB1B"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueB1B"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">RequestRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldB2A"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueB2A"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"fieldB2B"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"valueB2B"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">}</span>
|
|
<span class="p">)</span></code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Would then serialize as (in hex):</p>
|
|
</div>
|
|
<details>
|
|
<summary class="title">Annotated Hex</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">// REQUEST (Complex)
|
|
-------- // (No Checksum Present)
|
|
01 // HDR:MSGSTART
|
|
00000001 // Protocol Version (1)
|
|
02 // HDR:BODYSTART
|
|
00000002 // Record Group Count (2)
|
|
000000f0 // Record Groups Size (240)
|
|
// Record Group 1 (120 bytes)
|
|
00000002 // Record Count (2)
|
|
00000070 // Record Group Size (112)
|
|
// Record Group 1, Record 1 (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 1, Record 1, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413141 // "fieldA1A"
|
|
76616c7565413141 // "valueA1A"
|
|
// Record Group 1, Record 1, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413142 // "fieldA1B"
|
|
76616c7565413142 // "valueA1B"
|
|
// Record Group 1, Record 2 (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 1, Record 2, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413241 // "fieldA2A"
|
|
76616c7565413241 // "valueA2A"
|
|
// Record Group 1, Record 2, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413242 // "fieldA2B"
|
|
76616c7565413242 // "valueA2B"
|
|
// Record Group 2 (120 bytes)
|
|
00000002 // Record Count (2)
|
|
00000070 // Record Group Size (112)
|
|
// Record Group 2, Record 1 (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 2, Record 1, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423141 // "fieldB1A"
|
|
76616c7565423141 // "valueB1A"
|
|
// Record Group 2, Record 1, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423142 // "fieldB1B"
|
|
76616c7565423142 // "valueB1B"
|
|
// Record Group 2, Record 2 (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 2, Record 2, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423241 // "fieldB2A"
|
|
76616c7565423241 // "valueB2A"
|
|
// Record Group 2, Record 2, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423242 // "fieldB2B"
|
|
76616c7565423242 // "valueB2B"
|
|
03 // HDR:BODYEND
|
|
04 // HDR:MSGEND</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Or, non-annotated:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">01000000010200000002000000f00000000200000070000000020000003000000008000000086669
|
|
656c6441314176616c756541314100000008000000086669656c6441314276616c75654131420000
|
|
00020000003000000008000000086669656c6441324176616c756541324100000008000000086669
|
|
656c6441324276616c75654132420000000200000070000000020000003000000008000000086669
|
|
656c6442314176616c756542314100000008000000086669656c6442314276616c75654231420000
|
|
00020000003000000008000000086669656c6442324176616c756542324100000008000000086669
|
|
656c6442324276616c75654232420304</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect3">
|
|
<h4 id="ref_multi_resp"><a class="link" href="#ref_multi_resp">7.2.2. Complex Response</a></h4>
|
|
<details>
|
|
<summary class="title">Example Message Structure (Response to Multiple/Many Requests, Single Message)</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="go"><span class="k">package</span> <span class="n">wireproto</span>
|
|
|
|
<span class="k">var</span> <span class="p">(</span>
|
|
<span class="c">// RESPONSE (Complex)</span>
|
|
<span class="n">testMultiResp</span> <span class="o">*</span><span class="n">Response</span> <span class="o">=</span> <span class="o">&</span><span class="n">Response</span><span class="p">{</span>
|
|
<span class="n">Status</span><span class="o">:</span> <span class="n">AsciiACK</span><span class="p">,</span>
|
|
<span class="n">Checksum</span><span class="o">:</span> <span class="m">2928197330</span><span class="p">,</span> <span class="c">// 0xae88bed2</span>
|
|
<span class="n">ProtocolVersion</span><span class="o">:</span> <span class="n">ProtoVersion</span><span class="p">,</span>
|
|
<span class="n">RecordGroups</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">ResponseRecordGroup</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">ResponseRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"dataA1"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"<arbitrary data>"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="n">OriginalRecord</span><span class="o">:</span> <span class="n">testMultiReq</span><span class="o">.</span><span class="n">RecordGroups</span><span class="p">[</span><span class="m">0</span><span class="p">]</span><span class="o">.</span><span class="n">Records</span><span class="p">[</span><span class="m">0</span><span class="p">],</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"dataA2"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"<arbitrary data>"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="n">OriginalRecord</span><span class="o">:</span> <span class="n">testMultiReq</span><span class="o">.</span><span class="n">RecordGroups</span><span class="p">[</span><span class="m">0</span><span class="p">]</span><span class="o">.</span><span class="n">Records</span><span class="p">[</span><span class="m">1</span><span class="p">],</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">ResponseRecordGroup</span><span class="p">{</span>
|
|
<span class="n">Records</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"dataB1"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"<arbitrary data>"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="n">OriginalRecord</span><span class="o">:</span> <span class="n">testMultiReq</span><span class="o">.</span><span class="n">RecordGroups</span><span class="p">[</span><span class="m">1</span><span class="p">]</span><span class="o">.</span><span class="n">Records</span><span class="p">[</span><span class="m">0</span><span class="p">],</span>
|
|
<span class="p">},</span>
|
|
<span class="o">&</span><span class="n">ResponseRecord</span><span class="p">{</span>
|
|
<span class="n">Pairs</span><span class="o">:</span> <span class="p">[]</span><span class="o">*</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="o">&</span><span class="n">FieldValuePair</span><span class="p">{</span>
|
|
<span class="n">Name</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"dataB2"</span><span class="p">),</span>
|
|
<span class="n">Value</span><span class="o">:</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">(</span><span class="s">"<arbitrary data>"</span><span class="p">),</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="n">OriginalRecord</span><span class="o">:</span> <span class="n">testMultiReq</span><span class="o">.</span><span class="n">RecordGroups</span><span class="p">[</span><span class="m">1</span><span class="p">]</span><span class="o">.</span><span class="n">Records</span><span class="p">[</span><span class="m">1</span><span class="p">],</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">},</span>
|
|
<span class="p">}</span>
|
|
<span class="p">)</span></code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Would then serialize as (in hex):</p>
|
|
</div>
|
|
<details>
|
|
<summary class="title">Annotated Hex</summary>
|
|
<div class="content">
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">// RESPONSE (Complex)
|
|
06 // HDR:RESPSTART (Status: OK)
|
|
1b // HDR:CKSUM
|
|
ae88bed2 // Checksum Value (2928197330)
|
|
01 // HDR:MSGSTART
|
|
00000001 // Protocol Version (1)
|
|
02 // HDR:BODYSTART
|
|
00000002 // Record Group Count (2)
|
|
00000198 // Record Groups Size (408)
|
|
// Record Group 1 (204)
|
|
00000002 // Record Count (2)
|
|
000000c4 // Record Group Size (196)
|
|
// Record Group 1, Record 1 (98 bytes)
|
|
00000001 // Field/Value Count (1)
|
|
0000001e // Record Size (30)
|
|
00000038 // Request Record Size (56)
|
|
// Record Group 1, Record 1, Field/Value 1 (30 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000010 // Field Value Size (16)
|
|
646174614131 // "dataA1"
|
|
3c6172626974726172792064 // "<arbitrary data>"
|
|
6174613e
|
|
// Record Group 1, Record 1 (REQUEST RECORD) (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 1, Record 1, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413141 // "fieldA1A"
|
|
76616c7565413141 // "valueA1A"
|
|
// Record Group 1, Record 1, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413142 // "fieldA1B"
|
|
76616c7565413142 // "valueA1B"
|
|
// Record Group 1, Record 2 (98 bytes)
|
|
00000001 // Field/Value Count (1)
|
|
0000001e // Record Size (30)
|
|
00000038 // Request Record Size (56)
|
|
// Record Group 1, Record 2, Field/Value 1 (30 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000010 // Field Value Size (16)
|
|
646174614132 // "dataA2"
|
|
3c6172626974726172792064 // "<arbitrary data>"
|
|
6174613e
|
|
// Record Group 1, Record 2 (REQUEST RECORD) (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 1, Record 2, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413241 // "fieldA2A"
|
|
76616c7565413241 // "valueA2A"
|
|
// Record Group 1, Record 2, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64413242 // "fieldA2B"
|
|
76616c7565413242 // "valueA2B"
|
|
// Record Group 2 (204)
|
|
00000002 // Record Count (2)
|
|
000000c4 // Record Group Size (196)
|
|
// Record Group 2, Record 1 (98 bytes)
|
|
00000001 // Field/Value Count (1)
|
|
0000001e // Record Size (30)
|
|
00000038 // Request Record Size (56)
|
|
// Record Group 2, Record 1, Field/Value 1 (30 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000010 // Field Value Size (16)
|
|
646174614231 // "dataB1"
|
|
3c6172626974726172792064 // "<arbitrary data>"
|
|
6174613e
|
|
// Record Group 2, Record 1 (REQUEST RECORD) (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 2, Record 1, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423141 // "fieldB1A"
|
|
76616c7565423141 // "valueB1A"
|
|
// Record Group 2, Record 1, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423142 // "fieldB1B"
|
|
76616c7565423142 // "valueB1B"
|
|
// Record Group 2, Record 2 (98 bytes)
|
|
00000001 // Field/Value Count (1)
|
|
0000001e // Record Size (30)
|
|
00000038 // Request Record Size (56)
|
|
// Record Group 2, Record 2, Field/Value 1 (30 bytes)
|
|
00000006 // Field Name Size (6)
|
|
00000010 // Field Value Size (16)
|
|
646174614232 // "dataB2"
|
|
3c6172626974726172792064 // "<arbitrary data>"
|
|
6174613e
|
|
// Record Group 2, Record 2 (REQUEST RECORD) (56 bytes)
|
|
00000002 // Field/Value Count (2)
|
|
00000030 // Record Size (48)
|
|
// Record Group 2, Record 2, Field/Value 1 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423241 // "fieldB2A"
|
|
76616c7565423241 // "valueB2A"
|
|
// Record Group 2, Record 2, Field/Value 2 (24 bytes)
|
|
00000008 // Field Name Size (8)
|
|
00000008 // Field Value Size (8)
|
|
6669656c64423242 // "fieldB2B"
|
|
76616c7565423242 // "valueB2B"
|
|
03 // HDR:BODYEND
|
|
04 // HDR:MSGEND</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</details>
|
|
<div class="paragraph">
|
|
<p>Or, non-annotated:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="rouge highlight"><code data-lang="text">061bae88bed2010000000102000000020000019800000002000000c4000000010000001e00000038
|
|
00000006000000106461746141313c61726269747261727920646174613e00000002000000300000
|
|
0008000000086669656c6441314176616c756541314100000008000000086669656c644131427661
|
|
6c7565413142000000010000001e0000003800000006000000106461746141323c61726269747261
|
|
727920646174613e000000020000003000000008000000086669656c6441324176616c7565413241
|
|
00000008000000086669656c6441324276616c756541324200000002000000c4000000010000001e
|
|
0000003800000006000000106461746142313c61726269747261727920646174613e000000020000
|
|
003000000008000000086669656c6442314176616c756542314100000008000000086669656c6442
|
|
314276616c7565423142000000010000001e0000003800000006000000106461746142323c617262
|
|
69747261727920646174613e000000020000003000000008000000086669656c6442324176616c75
|
|
6542324100000008000000086669656c6442324276616c75654232420304</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="footnotes">
|
|
<hr>
|
|
<div class="footnote" id="_footnotedef_1">
|
|
<a href="#_footnoteref_1">1</a>. Response messages only.
|
|
</div>
|
|
<div class="footnote" id="_footnotedef_2">
|
|
<a href="#_footnoteref_2">2</a>. Optional for Request.
|
|
</div>
|
|
<div class="footnote" id="_footnotedef_3">
|
|
<a href="#_footnoteref_3">3</a>. Required for Response.
|
|
</div>
|
|
</div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Last updated 2024-07-09 18:58:47 -0400
|
|
</div>
|
|
</div>
|
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</body>
|
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</html> |