Internet DRAFT - draft-birrane-dtn-adm-agent
draft-birrane-dtn-adm-agent
Delay-Tolerant Networking E. Birrane
Internet-Draft E. DiPietro
Intended status: Experimental D. Linko
Expires: September 12, 2019 Johns Hopkins Applied Physics Laboratory
March 11, 2019
Asynchronous Management Protocol Agent Application Data Model
draft-birrane-dtn-adm-agent-05
Abstract
This document describes an Application Data Model (ADM) for an
Asynchronous Management Protocol (AMP) Agent. The AMP Agent
represents a managed device in the Asynchronous Management
Architecture. This document is in compliance with the template
provided by [I-D.birrane-dtn-adm].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 12, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Technical Notes . . . . . . . . . . . . . . . . . . . . . 2
1.2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Structure and Design of this ADM . . . . . . . . . . . . . . 3
3. Naming and Identification . . . . . . . . . . . . . . . . . . 4
3.1. Namespace and Nicknames . . . . . . . . . . . . . . . . . 4
4. AMP Agent ADM JSON Encoding . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 23
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1. Informative References . . . . . . . . . . . . . . . . . 23
6.2. Normative References . . . . . . . . . . . . . . . . . . 23
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 24
1. Introduction
An Application Data Model (ADM) provides a guaranteed interface for
the management of an application or protocol in accordance with the
Asynchronous Management Architecture (AMA) defined in
[I-D.birrane-dtn-ama]. The ADM described in this document complies
with the ADM Template provided in [I-D.birrane-dtn-adm] as encoded
using the JSON syntax.
The AMP Agent ADM provides the set of information necessary to
remotely manage agents in accordance with the Asynchronous Management
Protocol (AMP) defined in [I-D.birrane-dtn-amp]. AMP provides a
compact binary encoding of ADM objects and specifies a protocol for
the exchange of those objects.
1.1. Technical Notes
o This document describes Version 3.0 of the Agent ADM.
o The namespace associated with this ADM has not been finalized and,
therefore, any namespace references and associated encodings are
subject to change until the moderated namespace for this ADM has
been published.
o Agent applications MAY choose to ignore the name, description, or
other annotative information associated with the component
definitions within this ADM where such items are only used to
provide human-readable information or are otherwise not necessary
to manage a device.
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1.2. Scope
This ADM specifies those components of the Asynchronous Management
Model (AMM) common to the management of any instance of any AMP
Agent.
Any Manager software implementing this ADM MUST perform the
responsibilities of an AMA Manager as outlined in
[I-D.birrane-dtn-adm] as they relate to the objects included in this
document.
Any Agent software implementing this ADM MUST perform the
responsibilities of an AMA Agent as outlined in [I-D.birrane-dtn-adm]
as they relate to the objects included in this document.
1.3. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
2. Structure and Design of this ADM
The AMP Agent ADM's structure is in accordance to
[I-D.birrane-dtn-adm]. This ADM contains metadata, table templates,
and controls, variables, report templates, macros, edd, and
operators. The contents of this ADM are derived from the main
functions and data that an agent needs to run AMP
[I-D.birrane-dtn-amp].
The Metadata that is present in this document is common to all ADMs.
All ADMs have metadata that includes the name, namespace, and version
of the ADM as well as the name of the organization that is issuing
that particular ADM. This is important for identification purposes
of the ADMs and to ensure version control.
Because there are calculations done in various ADM objects that are
needed for AMP, the operators that were chosen were ones that were
the most common. For each of the most common operators, the only
ones that were expressed in the document were ones that had the same
input types and result types. This is to prevent a long list of
operators that may never be used. The additional information
provided in this ADM dealt with the number of known variables,
macros, rules, controls and constants as well as the number of those
instances that were running.
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3. Naming and Identification
This section outlines the namespaces used to uniquely identify ADM
objects in this specification.
3.1. Namespace and Nicknames
In accordance with [I-D.birrane-dtn-adm], every ADM is assigned a
moderated Namespace. In accordance with [I-D.birrane-dtn-amp], these
namespaces may be enumerated for compactness. The namespace and ADM
identification for these objects is defined as follows.
+-----------------+-----------+
| Identifier | Value |
+-----------------+-----------+
| Namespace | Amp/Agent |
| | |
| ADM Enumeration | 1 |
+-----------------+-----------+
Table 1: Namespace Information
Given the above ADM enumeration, in accordance with
[I-D.birrane-dtn-amp], the following AMP nicknames are defined.
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+----------+------------------------------+
| Nickname | Collection |
+----------+------------------------------+
| 20 | Amp/Agent/Const |
| | |
| 21 | Amp/Agent/Ctrl |
| | |
| 22 | Amp/Agent/Edd |
| | |
| 23 | Amp/Agent/Mac |
| | |
| 24 | Amp/Agent/Oper |
| | |
| 25 | Amp/Agent/Rptt |
| | |
| 27 | Amp/Agent/Tblt |
| | |
| 29 | Amp/Agent/Var |
| | |
| 30 | Amp/Agent/Mdat |
| | |
| 31-49 | Amp/Agent/Reserved |
+----------+------------------------------+
Table 2: Agent ADM Nicknames
4. AMP Agent ADM JSON Encoding
{
"Mdat": [{
"name": "name",
"type": "STR",
"value": "amp_agent",
"description": "The human-readable name of the ADM."
},
{
"name": "namespace",
"type": "STR",
"value": "Amp/Agent",
"description": "The namespace of the ADM."
},
{
"name": "version",
"type": "STR",
"value": "v3.1",
"description": "The version of the ADM."
},
{
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"name": "organization",
"type": "STR",
"value": "JHUAPL",
"description": "The name of the issuing organization of the
ADM."
}
],
"Edd": [{
"name": "num_rpt_tpls",
"type": "UINT",
"description": "This is the number of report templates known to
the Agent."
},
{
"name": "num_tbl_tpls",
"type": "UINT",
"description": "This is the number of table templates known to
the Agent."
},
{
"name": "sent_reports",
"type": "UINT",
"description": "This is the number of reports sent by the
Agent."
},
{
"name": "num_tbr",
"type": "UINT",
"description": "This is the number of time-based rules running
on the Agent."
},
{
"name": "run_tbr",
"type": "UINT",
"description": "This is the number of time-based rules run by
the Agent since the last reset."
},
{
"name": "num_sbr",
"type": "UINT",
"description": "This is the number of state-based rules running
on the Agent."
},
{
"name": "run_sbr",
"type": "UINT",
"description": "This is the number of state-based rules run by
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the agent since the last reset."
},
{
"name": "num_const",
"type": "UINT",
"description": "This is the number of constants known by the
Agent."
},
{
"name": "num_var",
"type": "UINT",
"description": "This is the number of variables known by the
Agent."
},
{
"name": "num_macros",
"type": "UINT",
"description": "This is the number of macros known by the
Agent."
},
{
"name": "run_macros",
"type": "UINT",
"description": "This is the number of macros run by the agent
since the last reset."
},
{
"name": "num_controls",
"type": "UINT",
"description": "This is the number of controls known by the
Agent."
},
{
"name": "run_controls",
"type": "UINT",
"description": "This is the number of controls run by the Agent
since the last reset."
},
{
"name": "cur_time",
"type": "TV",
"description": "This is the current system time."
}
],
"Var": [{
"name": "num_rules",
"type": "UINT",
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"initializer": {
"type": "UINT",
"postfix-expr": [{
"ns": "Amp/Agent",
"nm": "edd.num_tbr"
}, {
"ns": "Amp/Agent",
"nm": "edd.num_sbr"
}, {
"ns": "Amp/Agent",
"nm": "oper.plusUINT"
}]
},
"description": "This is the number of rules known to the Agent
(#TBR + #SBR)."
}],
"Tblt":[
{
"name":"adms",
"columns":[{
"type":"STR",
"name":"adm_name"
}],
"description":"This table lists all the ADMs that are supported
by the Agent."
},
{
"name":"variables",
"columns":[{
"type":"ARI",
"name":"ids"
}],
"description":"This table lists the ARI for every variable that
is known to the agent."
},
{
"name":"rptts",
"columns":[{
"type":"ARI",
"name":"ids"
}],
"description":"This table lists the ARI for every report
template that is known to the agent."
},
{
"name":"macros",
"columns":[{
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"type":"ARI",
"name":"ids"
}],
"description":"This table lists the ARI for every macro that is
known to the agent."
},
{
"name":"rules",
"columns":[{
"type":"ARI",
"name":"ids"
}],
"description":"This table lists the ARI for every rule that is
known to the agent."
},
{
"name":"tblts",
"columns":[{
"type":"ARI",
"name":"ids"
}],
"description":"This table lists the ARI for every table template
that is known to the agent."
}
],
"Rptt": [{
"name": "full_report",
"definition": [{
"ns": "Amp/Agent",
"nm": "mdat.name"
},
{
"ns": "Amp/Agent",
"nm": "mdat.version"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_rpt_tpls"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_tbl_tpls"
},
{
"ns": "Amp/Agent",
"nm": "edd.sent_reports"
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},
{
"ns": "Amp/Agent",
"nm": "edd.num_tbr"
},
{
"ns": "Amp/Agent",
"nm": "edd.run_tbr"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_sbr"
},
{
"ns": "Amp/Agent",
"nm": "edd.run_sbr"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_const"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_var"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_macros"
},
{
"ns": "Amp/Agent",
"nm": "edd.run_macros"
},
{
"ns": "Amp/Agent",
"nm": "edd.num_controls"
},
{
"ns": "Amp/Agent",
"nm": "edd.run_controls"
},
{
"ns": "Amp/Agent",
"nm": "var.num_rules"
}
],
"description": "This is all known meta-data, EDD, and VAR values
known by the Agent."
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}],
"Ctrl": [
{
"name": "add_var",
"parmspec": [{
"type": "ARI",
"name": "id"
},
{
"type": "EXPR",
"name": "def"
},
{
"type": "BYTE",
"name": "type"
}
],
"description": "This control configures a new variable
definition on the Agent."
},
{
"name": "del_var",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control removes one or more variable
definitions from the Agent."
},
{
"name": "add_rptt",
"parmspec": [{
"type": "ARI",
"name": "id"
},
{
"type": "AC",
"name": "template"
}
],
"description": "This control configures a new report template
definition on the Agent."
},
{
"name": "del_rptt",
"parmspec": [{
"type": "AC",
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"name": "ids"
}],
"description": "This control removes one or more report template
definitions from the Agent."
},
{
"name": "desc_rptt",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control produces a detailed description of
one or more report template identifier(ARI)
known to the Agent."
},
{
"name": "gen_rpts",
"parmspec": [{
"type": "AC",
"name": "ids"
},
{
"type": "TNVC",
"name": "rxmgrs"
}
],
"description": "This control causes the Agent to produce a
report entry for each identified report
templates and send them to one or more
identified managers(ARIs)."
},
{
"name":"gen_tbls",
"parmspec":[{
"type":"AC",
"name":"ids"
},
{
"type": "TNVC",
"name": "rxmgrs"
}
],
"description": "This control causes the Agent to produce a
table for each identified table templates and
send them to one or more identified managers."
},
{
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"name": "add_macro",
"parmspec": [{
"type": "STR",
"name": "name"
},
{
"type": "ARI",
"name": "id"
},
{
"type": "AC",
"name": "def"
}
],
"description": "This control configures a new macro definition
on the Agent."
},
{
"name": "del_macro",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control removes one or more macro
definitions from the Agent."
},
{
"name": "desc_macro",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control produces a detailed description of
one or more macro identifier(ARI) known to the
Agent."
},
{
"name": "add_tbr",
"parmspec": [{
"type": "ARI",
"name": "id"
},
{
"type": "TV",
"name": "start"
},
{
"type": "TV",
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"name": "period"
},
{
"type": "UVAST",
"name": "count"
},
{
"type": "AC",
"name": "action"
},
{
"type": "STR",
"name": "description"
}
],
"description": "This control configures a new time-based
rule (TBR) definition on the Agent."
},
{
"name": "add_sbr",
"parmspec": [{
"type": "ARI",
"name": "id"
},
{
"type": "TV",
"name": "start"
},
{
"type": "EXPR",
"name": "state"
},
{
"type": "UVAST",
"name": "max_eval"
},
{
"type": "UVAST",
"name": "count"
},
{
"type": "AC",
"name": "action"
},
{
"type": "STR",
"name": "description"
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}
],
"description": "This control configures a new state-based
rule (SBR) definition on the Agent."
},
{
"name": "del_rule",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control removes one or more rule
definitions from the Agent."
},
{
"name": "desc_rule",
"parmspec": [{
"type": "AC",
"name": "ids"
}],
"description": "This control produces a detailed description
of one or more rules known to the Agent."
},
{
"name": "store_var",
"parmspec": [{
"type": "ARI",
"name": "id"
},
{
"type": "EXPR",
"name": "value"
}],
"description": "This control stores variables."
},
{
"name": "reset_counts",
"description": "This control resets all Agent ADM statistics
reported in the Agent ADM report."
}
],
"Const": [{
"name": "amp_epoch",
"type": "TS",
"value": "1504915200",
"description": "This constant is the time epoch for the Agent."
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}],
"Mac": [{
"name": "user_desc",
"parmspec": [{
"type": "AC",
"name": "RPTTs"
},
{
"type": "AC",
"name": "Rules"
}],
"definition": [{
"ns": "Amp/Agent",
"nm": "ctrl.desc_rptt",
"ap": [{
"type": "ParmName",
"value": "RPTTs"
}]
},
{
"ns": "Amp/Agent",
"nm": "ctrl.desc_rule",
"ap": [{
"type": "ParmName",
"value": "Rules"
}]
}
],
"description": "This macro lists all of the user defined data."
}],
"Oper": [{
"name": "plusINT",
"result-type": "INT",
"in-type": ["INT", "INT"],
"description": "Int32 addition"
},
{
"name": "plusUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned Int32 addition"
},
{
"name": "plusVAST",
"result-type": "VAST",
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"in-type": ["VAST", "VAST"],
"description": "Int64 addition"
},
{
"name": "plusUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 addition"
},
{
"name": "plusREAL32",
"result-type": "REAL32",
"in-type": ["REAL32", "REAL32"],
"description": "Real32 addition"
},
{
"name": "plusREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 addition"
},
{
"name": "minusINT",
"result-type": "INT",
"in-type": ["INT", "INT"],
"description": "Int32 subtraction"
},
{
"name": "minusUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned Int32 subtraction"
},
{
"name": "minusVAST",
"result-type": "VAST",
"in-type": ["VAST", "VAST"],
"description": "Int64 subtraction"
},
{
"name": "minusUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 subtraction"
},
{
"name": "minusREAL32",
"result-type": "REAL32",
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"in-type": ["REAL32", "REAL32"],
"description": "Real32 subtraction"
},
{
"name": "minusREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 subtraction"
},
{
"name": "multINT",
"result-type": "INT",
"in-type": ["INT", "INT"],
"description": "Int32 multiplication"
},
{
"name": "multUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned Int32 multiplication"
},
{
"name": "multVAST",
"result-type": "VAST",
"in-type": ["VAST", "VAST"],
"description": "Int64 multiplication"
},
{
"name": "multUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 multiplication"
},
{
"name": "multREAL32",
"result-type": "REAL32",
"in-type": ["REAL32", "REAL32"],
"description": "Real32 multiplication"
},
{
"name": "multREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 multiplication"
},
{
"name": "divINT",
"result-type": "INT",
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"in-type": ["INT", "INT"],
"description": "Int32 division"
},
{
"name": "divUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned Int32 division"
},
{
"name": "divVAST",
"result-type": "VAST",
"in-type": ["VAST", "VAST"],
"description": "Int64 division"
},
{
"name": "divUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 division"
},
{
"name": "divREAL32",
"result-type": "REAL32",
"in-type": ["REAL32", "REAL32"],
"description": "Real32 division"
},
{
"name": "divREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 division"
},
{
"name": "modINT",
"result-type": "INT",
"in-type": ["INT", "INT"],
"description": "Int32 modulus division"
},
{
"name": "modUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned Int32 modulus division"
},
{
"name": "modVAST",
"result-type": "VAST",
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"in-type": ["VAST", "VAST"],
"description": "Int64 modulus division"
},
{
"name": "modUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 modulus division"
},
{
"name": "modREAL32",
"result-type": "REAL32",
"in-type": ["REAL32", "REAL32"],
"description": "Real32 modulus division"
},
{
"name": "modREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 modulus division"
},
{
"name": "expINT",
"result-type": "INT",
"in-type": ["INT", "INT"],
"description": "Int32 exponentiation"
},
{
"name": "expUINT",
"result-type": "UINT",
"in-type": ["UINT", "UINT"],
"description": "Unsigned int32 exponentiation"
},
{
"name": "expVAST",
"result-type": "VAST",
"in-type": ["VAST", "VAST"],
"description": "Int64 exponentiation"
},
{
"name": "expUVAST",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Unsigned Int64 exponentiation"
},
{
"name": "expREAL32",
"result-type": "REAL32",
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"in-type": ["REAL32", "REAL32"],
"description": "Real32 exponentiation"
},
{
"name": "expREAL64",
"result-type": "REAL64",
"in-type": ["REAL64", "REAL64"],
"description": "Real64 exponentiation"
},
{
"name": "bitAND",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Bitwise and"
},
{
"name": "bitOR",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Bitwise or"
},
{
"name": "bitXOR",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": "Bitwise xor"
},
{
"name": "bitNOT",
"result-type": "UVAST",
"in-type": ["UVAST"],
"description": "Bitwise not"
},
{
"name": "logAND",
"result-type": "BOOL",
"in-type": ["BOOL", "BOOL"],
"description": "Logical and"
},
{
"name": "logOR",
"result-type": "BOOL",
"in-type": ["BOOL", "BOOL"],
"description": "Logical or"
},
{
"name": "logNOT",
"result-type": "BOOL",
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"in-type": ["BOOL"],
"description": "Logical not"
},
{
"name": "abs",
"result-type": "UVAST",
"in-type": ["VAST"],
"description": "absolute value"
},
{
"name": "lessThan",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": "<"
},
{
"name": "greaterThan",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": ">"
},
{
"name": "lessEqual",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": "<="
},
{
"name": "greaterEqual",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": ">="
},
{
"name": "notEqual",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": "!="
},
{
"name": "Equal",
"result-type": "BOOL",
"in-type": ["UNK", "UNK"],
"description": "=="
},
{
"name": "bitShiftLeft",
"result-type": "UVAST",
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"in-type": ["UVAST", "UVAST"],
"description": "<<"
},
{
"name": "bitShiftRight",
"result-type": "UVAST",
"in-type": ["UVAST", "UVAST"],
"description": ">>"
},
{
"name": "STOR",
"result-type": "UNK",
"in-type": ["UNK", "UNK"],
"description": "Store value of parm 2 in parm 1"
}
]
}
5. IANA Considerations
This document defines a moderated Namespace: "Amp/Agent" with the ADM
enumeration of 0.
6. References
6.1. Informative References
[I-D.birrane-dtn-ama]
Birrane, E., "Asynchronous Management Architecture",
draft-birrane-dtn-ama-07 (work in progress), June 2018.
6.2. Normative References
[I-D.birrane-dtn-adm]
Birrane, E., DiPietro, E., and D. Linko, "AMA Application
Data Model", draft-birrane-dtn-adm-02 (work in progress),
June 2018.
[I-D.birrane-dtn-amp]
Birrane, E., "Asynchronous Management Protocol", draft-
birrane-dtn-amp-04 (work in progress), June 2018.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
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Authors' Addresses
Edward J. Birrane
Johns Hopkins Applied Physics Laboratory
Email: Edward.Birrane@jhuapl.edu
Evana DiPietro
Johns Hopkins Applied Physics Laboratory
Email: Evana.DiPietro@jhuapl.edu
David Linko
Johns Hopkins Applied Physics Laboratory
Email: David.Linko@jhuapl.edu
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