Discovery Tool fails to do SNMP network walk if SNMP v3 is selected

XMLWordPrintable

    • 1
    • Severity 2 - Major

      Issue Summary

      Using pattern: SNMP_Deviceinfo_Network.pat (v3.1.0)
      The bulk walk instruction can fail as the instruction set has changed.

      Inside ProviderClasses.dll, the TryBulkWalk() method calls Lextm.SharpSnmpLib.Messaging.Messanger.BulkWalk() with invalid arguments:

      • The last two args (IPrivacyProvider and ISnmpMessage) are both null (This causes the error as described)
        Please see second portion of: stackoverflow

      This is reproducible on Data Center: (no)

      Steps to Reproduce

      1. Requires Several SNMP_v3 devices
      2. Use a Pattern using SNMP_WALK

      Expected Results

      Using patterns shouldn't error in discovery

      Actual Results

      Error happening with SNMP_WALK

      The below exception is thrown in the discovery.log file:

      10/24/2023 6:58:31 AM: [Normal] Exceptions:
10/24/2023 6:58:31 AM: [Normal] Value cannot be null.
Parameter name: report
   at Lextm.SharpSnmpLib.Messaging.GetBulkRequestMessage..ctor(VersionCode version, Int32 messageId, Int32 requestId, OctetString userName, OctetString contextName, Int32 nonRepeaters, Int32 maxRepetitions, IList`1 variables, IPrivacyProvider privacy, Int32 maxMessageSize, ISnmpMessage report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\GetBulkRequestMessage.cs:line 153
   at Lextm.SharpSnmpLib.Messaging.Messenger.BulkHasNext(VersionCode version, IPEndPoint receiver, OctetString community, OctetString contextName, Variable seed, Int32 timeout, Int32 maxRepetitions, IList`1& next, IPrivacyProvider privacy, ISnmpMessage& report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\Messenger.cs:line 998
   at Lextm.SharpSnmpLib.Messaging.Messenger.BulkWalk(VersionCode version, IPEndPoint endpoint, OctetString community, OctetString contextName, ObjectIdentifier table, IList`1 list, Int32 timeout, Int32 maxRepetitions, WalkMode mode, IPrivacyProvider privacy, ISnmpMessage report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\Messenger.cs:line 804
   at Insight.Discovery.ProviderClasses.SNMPProvider.TryBulkWalk(VersionCode versionCode, Variable commandVar, List`1 result, Boolean forceBulkWalk)
10/24/2023 6:58:31 AM: [Debug] Start adding result data from snmp-data result.
10/24/2023 6:58:31 AM: [Debug] Finish adding result data from snmp-data result.
10/24/2023 6:58:31 AM: [Debug] Generating response for command 
    1.3.6.1.2.1.2.2.1;
    1.3.6.1.2.1.4.20.1.2
10/24/2023 6:58:31 AM: [Debug] BulkWalk Response error for command: 
    1.3.6.1.2.1.2.2.1;
    1.3.6.1.2.1.4.20.1.2
10/24/2023 6:58:31 AM: [Normal] Exceptions:
10/24/2023 6:58:31 AM: [Normal] Value cannot be null.
Parameter name: report
   at Lextm.SharpSnmpLib.Messaging.GetBulkRequestMessage..ctor(VersionCode version, Int32 messageId, Int32 requestId, OctetString userName, OctetString contextName, Int32 nonRepeaters, Int32 maxRepetitions, IList`1 variables, IPrivacyProvider privacy, Int32 maxMessageSize, ISnmpMessage report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\GetBulkRequestMessage.cs:line 153
   at Lextm.SharpSnmpLib.Messaging.Messenger.BulkHasNext(VersionCode version, IPEndPoint receiver, OctetString community, OctetString contextName, Variable seed, Int32 timeout, Int32 maxRepetitions, IList`1& next, IPrivacyProvider privacy, ISnmpMessage& report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\Messenger.cs:line 998
   at Lextm.SharpSnmpLib.Messaging.Messenger.BulkWalk(VersionCode version, IPEndPoint endpoint, OctetString community, OctetString contextName, ObjectIdentifier table, IList`1 list, Int32 timeout, Int32 maxRepetitions, WalkMode mode, IPrivacyProvider privacy, ISnmpMessage report) in C:\Users\lextudio\source\repos\sharpsnmplib\SharpSnmpLib\Messaging\Messenger.cs:line 804
   at Insight.Discovery.ProviderClasses.SNMPProvider.TryBulkWalk(VersionCode versionCode, Variable commandVar, List`1 result, Boolean forceBulkWalk)
How To Replicate

      Workaround

      Currently there is no known workaround for this behavior. A workaround will be added here when available

            Assignee:
            Zakhar Listiev (Inactive)
            Reporter:
            Louis (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

              Created:
              Updated:
              Resolved: