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Description:

pysmilextudio 1.4.3

SNMP MIB Compiler

PySMI is a pure-Python implementation of
SNMP SMI MIB parser.
This tool is designed to turn ASN.1 MIBs into various formats. As of this moment,
JSON and PySNMP modules can be generated
from ASN.1 MIBs.
Features

Understands SMIv1, SMIv2 and de-facto SMI dialects
Turns MIBs into PySNMP classes and JSON documents
Maintains an index of MIB objects over many MIB modules
Automatically pulls ASN.1 MIBs from local directories, ZIP archives,
and HTTP servers
100% Python, works with Python 3.8+

Rendered PySMI documentation can be found at PySMI site.
How to use PySMI
If you are using PySNMP, you might never notice PySMI presence - PySNMP
calls PySMI for MIB download and compilation behind the scenes (you can
still can do that manually by invoking mibdump tool).
To turn ASN.1 MIB into a JSON document, call mibdump tool like this:
$ mibdump --generate-mib-texts --destination-format json IF-MIB
Source MIB repositories: file:///usr/share/snmp/mibs, https://mibs.pysnmp.com/asn1/@mib@
Borrow missing/failed MIBs from: https://mibs.pysnmp.com/json/fulltexts/@mib@
Existing/compiled MIB locations:
Compiled MIBs destination directory: .
MIBs excluded from code generation: RFC-1212, RFC-1215, RFC1065-SMI, RFC1155-SMI,
RFC1158-MIB, RFC1213-MIB, SNMPv2-CONF, SNMPv2-SMI, SNMPv2-TC, SNMPv2-TM
MIBs to compile: IF-MIB
Destination format: json
Parser grammar cache directory: not used
Also compile all relevant MIBs: yes
Rebuild MIBs regardless of age: yes
Do not create/update MIBs: no
Byte-compile Python modules: no (optimization level no)
Ignore compilation errors: no
Generate OID->MIB index: no
Generate texts in MIBs: yes
Keep original texts layout: no
Try various filenames while searching for MIB module: yes
Created/updated MIBs: IANAifType-MIB, IF-MIB, SNMPv2-MIB
Pre-compiled MIBs borrowed:
Up to date MIBs: SNMPv2-CONF, SNMPv2-SMI, SNMPv2-TC
Missing source MIBs:
Ignored MIBs:
Failed MIBs:

JSON document build from
IF-MIB module
would hold information such as:
{
"ifMIB": {
"name": "ifMIB",
"oid": "1.3.6.1.2.1.31",
"class": "moduleidentity",
"revisions": [
"2007-02-15 00:00",
"1996-02-28 21:55",
"1993-11-08 21:55"
]
},
// ...
"ifTestTable": {
"name": "ifTestTable",
"oid": "1.3.6.1.2.1.31.1.3",
"nodetype": "table",
"class": "objecttype",
"maxaccess": "not-accessible"
},
"ifTestEntry": {
"name": "ifTestEntry",
"oid": "1.3.6.1.2.1.31.1.3.1",
"nodetype": "row",
"class": "objecttype",
"maxaccess": "not-accessible",
"augmention": {
"name": "ifTestEntry",
"module": "IF-MIB",
"object": "ifEntry"
}
},
"ifTestId": {
"name": "ifTestId",
"oid": "1.3.6.1.2.1.31.1.3.1.1",
"nodetype": "column",
"class": "objecttype",
"syntax": {
"type": "TestAndIncr",
"class": "type"
},
"maxaccess": "read-write"
},
// ...
}

In general, converted MIBs capture all aspects of original (ASN.1) MIB contents
and layout. The snippet above is just a partial example, but here is the
complete IF-MIB.json
file.
Besides one-to-one MIB conversion, PySMI library can produce JSON index to
facilitate fast MIB information lookup across large collection of MIB files.
For example, JSON index for
IP-MIB.json,
TCP-MIB.json and
UDP-MIB.json
modules would keep information like this:
{
"compliance": {
"1.3.6.1.2.1.48.2.1.1": [
"IP-MIB"
],
"1.3.6.1.2.1.49.2.1.1": [
"TCP-MIB"
],
"1.3.6.1.2.1.50.2.1.1": [
"UDP-MIB"
]
},
"identity": {
"1.3.6.1.2.1.48": [
"IP-MIB"
],
"1.3.6.1.2.1.49": [
"TCP-MIB"
],
"1.3.6.1.2.1.50": [
"UDP-MIB"
]
},
"oids": {
"1.3.6.1.2.1.4": [
"IP-MIB"
],
"1.3.6.1.2.1.5": [
"IP-MIB"
],
"1.3.6.1.2.1.6": [
"TCP-MIB"
],
"1.3.6.1.2.1.7": [
"UDP-MIB"
],
"1.3.6.1.2.1.49": [
"TCP-MIB"
],
"1.3.6.1.2.1.50": [
"UDP-MIB"
]
}
}

With this example, compliance and identity keys point to
MODULE-COMPLIANCE and MODULE-IDENTITY MIB objects, oids
list top-level OIDs branches defined in MIB modules. Full index
build over thousands of MIBs could be seen
here.
The PySMI library can automatically fetch required MIBs from HTTP sites
or local directories. You could configure any MIB source available to you (including
https://mibs.pysnmp.com/asn1/) for that purpose.
How to get PySMI
The pysmi package is distributed under terms and conditions of 2-clause
BSD license. Source code is freely
available as a GitHub repo.
You could pip install pysmi-lextudio or download it from PyPI.
If something does not work as expected,
open an issue at GitHub or
post your question on Stack Overflow.
Copyright (c) 2015-2020, Ilya Etingof.
Copyright (c) 2022-2024, LeXtudio Inc..
All rights reserved.