How to parse SNMP traps in C#?

Question

Hi All,
We have a C# console application built on .Net core. We have requirement to parse SNMP trap in C#. My question is is there any method/class available in to parse below sample SNMP trap?

Sample SNMP trap:

2020-08-04 04:56:45

04:56:44 2020/08/04 PDU INFO:
notificationtype TRAP
version 0
receivedfrom UDP: [192.168.100.100]:38977->[192.168.100.20]:162
errorstatus 0
messageid 0
community admin
transactionid 1056
errorindex 0
requestid 0
VARBINDS:
DISMAN-EVENT-MIB::sysUpTimeInstance type=67 value=Timeticks: (57947996) 6 days, 16:57:59.96
SNMPv2-MIB::snmpTrapOID.0 type=6 value=OID: IF-MIB::linkUp
IF-MIB::ifIndex.19 type=2 value=INTEGER: 19
IF-MIB::ifAdminStatus.19 type=2 value=INTEGER: 1
IF-MIB::ifOperStatus.19 type=2 value=INTEGER: 1
SNMP-COMMUNITY-MIB::snmpTrapAddress.0 type=64 value=IpAddress: 192.168.100.100
SNMP-COMMUNITY-MIB::snmpTrapCommunity.0 type=4 value=STRING: "admin"
SNMPv2-MIB::snmpTrapEnterprise.0 type=6 value=OID: SNMPv2-SMI::enterprises.25506.11.1.219

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Can anyone please let us know the best way to get this done!!
Any help is appreciated. Thank you in advance!!

Best Regards,
Hari

Answer 1

You can build upon C# SNMP Library (#SNMP) to monitor incoming SNMP TRAP/INFORM messages, as it has a TRAP listener sample,

https://github.com/lextudio/sharpsnmplib-samples/tree/master/Samples/CSharpCore/snmptrapd

However, if you want to format OIDs and data types properly, that requires MIB parsing functionality and is only available with #SNMP Pro.