SnmpKit.SnmpSim.Device.OidHandler (snmpkit v2.0.0)

OID handling and value generation for SNMP device simulation. Handles dynamic OID value generation, interface statistics, and MIB walking.

Summary

Functions

extract_oid(varbind)

Extracts OID from SNMP PDU variable binding.

extract_type_and_value(value)

Extracts type and value from SNMP variable binding.

get_dynamic_oid_value(oid, state)

Gets dynamic OID value based on device state and OID.

get_next_oid_value(device_type, oid, state)

Finds the next OID in lexicographic order for SNMP GetNext operations.

get_oid_value(oid, state)

Gets OID value based on device state and OID.

oid_to_string(oid)

Converts OID list to string representation.

string_to_oid_list(oid_string)

Converts string OID to list of integers.

walk_oid_recursive(oid, root_oid, state, acc)
walk_oid_values(oid, state)

Walks OID values for SNMP MIB walking.

Functions

extract_oid(varbind)

Extracts OID from SNMP PDU variable binding.

Parameters

  • varbind - SNMP variable binding containing OID and value

Returns

  • oid - Successfully extracted OID

extract_type_and_value(value)

Extracts type and value from SNMP variable binding.

Parameters

  • varbind - SNMP variable binding

Returns

  • {type, value} - Tuple containing SNMP type and value

get_dynamic_oid_value(oid, state)

Gets dynamic OID value based on device state and OID.

Parameters

  • oid - OID as string
  • state - Device state containing configuration and counters

Returns

  • {:ok, {type, value}} - Successfully retrieved OID value with type
  • {:error, reason} - Failed to retrieve OID value

get_next_oid_value(device_type, oid, state)

Finds the next OID in lexicographic order for SNMP GetNext operations.

Parameters

  • oid - Starting OID as list of integers
  • state - Device state

Returns

  • {:ok, {next_oid, type, value}} - Next OID with its type and value
  • {:error, :end_of_mib} - No more OIDs available

get_oid_value(oid, state)

Gets OID value based on device state and OID.

Parameters

  • oid - OID as list of integers or binary string
  • state - Device state containing configuration and counters or device type

Returns

  • {:ok, value} - Successfully retrieved OID value
  • {:error, reason} - Failed to retrieve OID value

oid_to_string(oid)

Converts OID list to string representation.

Parameters

  • oid - List of integers representing OID

Returns

  • String representation of OID (e.g., "1.3.6.1.2.1.1.1.0")

string_to_oid_list(oid_string)

Converts string OID to list of integers.

Parameters

  • oid_string - String representation of OID

Returns

  • List of integers representing OID

walk_oid_recursive(oid, root_oid, state, acc)

walk_oid_values(oid, state)

Walks OID values for SNMP MIB walking.

Parameters

  • oid - Starting OID as list of integers
  • state - Device state

Returns

  • {:ok, oid_values} - List of OID values