SNMPTrapMgr Module

Properties   Methods   Events   Config Settings   Errors  

The SNMPTrapMgr module provides a UDP-based listening point for SNMP traps.

Syntax

IPWorksSNMP.Snmptrapmgr

Remarks

The SNMPTrapMgr class provides a UDP-based listening point for SNMP traps and informs as specified by the SNMP RFCs. The class supports v1, v2c, and v3 traps.

The class provides both encoding/decoding and transport capabilities, making the task of developing a custom SNMP Trap manager as simple as setting a few key properties and handling a few events. SNMP data, such as for instance SNMP object id-s (OID-s) are exchanged as text strings, thus further simplifying the task of handling them.

The class is activated/deactivated by calling the Activate or Deactivate method. These methods enable or disable sending and receiving. The activation status can be found in the Active property.

Messages are received through events such as Trap, InformRequest, or DiscoveryRequest.

SNMP OIDs, types, and values are provided in the Objects collection of SNMP objects for both sent and received packets.

SNMPv3 USM security passwords are requested through the GetUserPassword event, and event parameters such as User and SecurityLevel provide information about the security attributes of received requests, and enable granular decision capability about what to provide and what not to provide.

The AddUser, RemoveUser, ShowCache, ClearCache, AddEngine, and RemoveEngine methods are used to manage an internal authentication cache. This internal cache can be used as an alternative to the GetUserPassword event, automatically checking the cache against the security parameters provided in the request signature.

Property List

The following is the full list of the properties of the module with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the module with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the module with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the module with short descriptions. Click on the links for further details.

AcceptData Property (SNMPTrapMgr Module)

Enables or disables data reception.

Syntax

• Swift
• Objective-C

public var acceptData: Bool {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=acceptData,setter=setAcceptData:) BOOL acceptData;

- (BOOL)acceptData;
- (void)setAcceptData :(BOOL)newAcceptData;

Default Value

True

Remarks

Setting the property to False temporarily disables data reception. Setting the property to True re-enables data reception.

Active Property (SNMPTrapMgr Module)

Indicates whether the module is active.

Syntax

• Swift
• Objective-C

public var active: Bool {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=active,setter=setActive:) BOOL active;

- (BOOL)active;
- (void)setActive :(BOOL)newActive;

Default Value

False

Remarks

This property indicates whether the class is currently active and can send or receive data.

The class will be automatically activated if it is not already and you attempt to perform an operation which requires the class to be active.

Note: Use the Activate or Deactivate method to control whether the class is active.

LocalEngineId Property (SNMPTrapMgr Module)

The Engine Id (for SNMPv3).

Syntax

• Swift
• Objective-C

public var localEngineId: String {
  get {...}
  set {...}
}

public var localEngineIdB: Data {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=localEngineId,setter=setLocalEngineId:) NSString* localEngineId;

- (NSString*)localEngineId;
- (void)setLocalEngineId :(NSString*)newLocalEngineId;

@property (nonatomic,readwrite,assign,getter=localEngineIdB,setter=setLocalEngineIdB:) NSData* localEngineIdB;

- (NSData*)localEngineIdB;
- (void)setLocalEngineIdB :(NSData*)newLocalEngineId;

Default Value

""

Remarks

This property is necessary for properly handling InformRequest packets.

LocalHost Property (SNMPTrapMgr Module)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

• Swift
• Objective-C

public var localHost: String {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=localHost,setter=setLocalHost:) NSString* localHost;

- (NSString*)localHost;
- (void)setLocalHost :(NSString*)newLocalHost;

Default Value

""

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

LocalPort Property (SNMPTrapMgr Module)

The port in the local host where the module is bound to.

Syntax

• Swift
• Objective-C

public var localPort: Int32 {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=localPort,setter=setLocalPort:) int localPort;

- (int)localPort;
- (void)setLocalPort :(int)newLocalPort;

Default Value

162

Remarks

The LocalPort property must be set before the class is activated (Active is set to True). It instructs the class to bind to a specific port (or communication endpoint) in the local machine.

The default port is 162 (standard trap port). If that port is busy, an error will be returned, unless the ForceLocalPort configuration setting is set to False, in which case a random port will be chosen.

LocalPort cannot be changed once the class is Active. Any attempt to set the LocalPort property when the class is Active will generate an error.

Note: on macOS and iOS, root permissions are required to set LocalPort to any value below 1024.

Objects Property (SNMPTrapMgr Module)

The objects in the current request.

Syntax

• Swift
• Objective-C

public var objects: Array<SNMPObject> {
  get {...}
}

@property (nonatomic,readwrite,assign,getter=objCount,setter=setObjCount:) int objCount;

- (int)objCount;
- (void)setObjCount :(int)newObjCount;

- (int)objType:(int)objIndex;
- (void)setObjType:(int)objIndex :(int)newObjType;

- (NSString*)objId:(int)objIndex;
- (void)setObjId:(int)objIndex :(NSString*)newObjId;

- (NSString*)objTypeString:(int)objIndex;

- (NSString*)objValue:(int)objIndex;
- (void)setObjValue:(int)objIndex :(NSString*)newObjValue;

- (NSData*)objValueB:(int)objIndex;
- (void)setObjValueB:(int)objIndex :(NSData*)newObjValue;

Default Value

1

Remarks

The SNMP objects being sent or received in the current request. The collection is first cleared, then populated every time an SNMP packet is received. It is also used to create outgoing SNMP packets.

RequestId Property (SNMPTrapMgr Module)

The request-id to mark outgoing packets with.

Syntax

• Swift
• Objective-C

public var requestId: Int32 {
  get {...}
  set {...}
}

@property (nonatomic,readwrite,assign,getter=requestId,setter=setRequestId:) int requestId;

- (int)requestId;
- (void)setRequestId :(int)newRequestId;

Default Value

1

Remarks

If a custom value is needed for RequestId, the property must be set before sending the request. The class increments RequestId automatically after sending each packet.

Activate Method (SNMPTrapMgr Module)

Activates the component.

Syntax

• Swift
• Objective-C

public func activate() throws -> Void

- (void)activate;

Remarks

This method activates the component and will allow it to send or receive data.

The class will be automatically activated if it is not already and you attempt to perform an operation which requires the class to be active.

Note: Use the Active property to check whether the component is active.

AddEngine Method (SNMPTrapMgr Module)

Adds the engine specified by EngineId to the internal authentication cache.

Syntax

• Swift
• Objective-C

public func addEngine(engineId: Data, engineBoots: Int32, engineTime: Int32) throws -> Void

- (void)addEngine:(NSData*)engineId :(int)engineBoots :(int)engineTime;

Remarks

The internal authentication cache can be used as an alternative to the GetUserPassword event, automatically checking the cache against the security parameters provided in the request signature.

The ShowCache method is used to show the contents of the internal authentication cache.

The ClearCache method can be used to completely clear the cache.

If the engine parameters are unknown, the SNMPMgr class's Discover method can be used to perform a discovery with the agent. The RemoteEngineId, RemoteEngineTime, and RemoteEngineBoots properties will hold the values that can then be passed to this method.

AddUser Method (SNMPTrapMgr Module)

Adds a user for the engine specified by EngineId to the internal authentication cache.

Syntax

• Swift
• Objective-C

public func addUser(user: String, engineId: Data, authenticationProtocol: Int32, authenticationPassword: String, encryptionAlgorithm: Int32, encryptionPassword: String) throws -> Void

- (void)addUser:(NSString*)user :(NSData*)engineId :(int)authenticationProtocol :(NSString*)authenticationPassword :(int)encryptionAlgorithm :(NSString*)encryptionPassword;

Remarks

The internal authentication cache can be used as an alternative to the GetUserPassword event, automatically checking the cache against the security parameters provided in the request signature.

The ShowCache method is used to show the contents of the internal authentication cache.

The ClearCache method can be used to completely clear the cache.

Valid Authentication Protocols are:

Valid Encryption Algorithms are:

ClearCache Method (SNMPTrapMgr Module)

Clears the internal authentication database.

Syntax

• Swift
• Objective-C

public func clearCache() throws -> Void

- (void)clearCache;

Remarks

All user and engine records are removed from the internal authentication cache as a result of this call.

Config Method (SNMPTrapMgr Module)

Sets or retrieves a configuration setting.

Syntax

• Swift
• Objective-C

public func config(configurationString: String) throws -> String

- (NSString*)config:(NSString*)configurationString;

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Deactivate Method (SNMPTrapMgr Module)

Deactivates the component.

Syntax

• Swift
• Objective-C

public func deactivate() throws -> Void

- (void)deactivate;

Remarks

This method deactivates the component and will prohibit it from sending and receiving data.

Note: Use the Active property to check whether the component is active.

DoEvents Method (SNMPTrapMgr Module)

Processes events from the internal message queue.

Syntax

• Swift
• Objective-C

public func doEvents() throws -> Void

- (void)doEvents;

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

HashPasswords Method (SNMPTrapMgr Module)

Hashes all passwords in the cache.

Syntax

• Swift
• Objective-C

public func hashPasswords() throws -> Void

- (void)hashPasswords;

Remarks

Forces computation of all passwords hashes in the cache. Used together with the HashPassword event to enable implementations of external password hash storage.

RemoveEngine Method (SNMPTrapMgr Module)

Removes the engine specified by EngineId from the internal authentication cache.

Syntax

• Swift
• Objective-C

public func removeEngine(engineId: Data) throws -> Void

- (void)removeEngine:(NSData*)engineId;

Remarks

The internal authentication cache can be used as an alternative to the GetUserPassword event, automatically checking the cache against the security parameters provided in the request signature.

The ShowCache method is used to show the contents of the internal authentication cache.

The ClearCache method can be used to completely clear the cache.

RemoveUser Method (SNMPTrapMgr Module)

Removes the user specified by User of the engine specified by EngineId from the internal authentication cache.

Syntax

• Swift
• Objective-C

public func removeUser(user: String, engineId: Data) throws -> Void

- (void)removeUser:(NSString*)user :(NSData*)engineId;

Remarks

The internal authentication cache can be used as an alternative to the GetUserPassword event, automatically checking the cache against the security parameters provided in the request signature.

The ShowCache method is used to show the contents of the internal authentication cache.

The ClearCache method can be used to completely clear the cache.

Reset Method (SNMPTrapMgr Module)

Clears the object arrays.

Syntax

• Swift
• Objective-C

public func reset() throws -> Void

- (void)reset;

Remarks

Clears the object arrays, and sets the trap and error properties to their default values. This is useful for reinitializing all the properties that are used to create outgoing packets before building a new packet.

Note: SNMPVersion will be reset to snmpverV2c (2).

ShowCache Method (SNMPTrapMgr Module)

Lists all entries in the internal user and engine database.

Syntax

• Swift
• Objective-C

public func showCache() throws -> Void

- (void)showCache;

Remarks

A CacheEntry event is fired for every record in the database.

Value Method (SNMPTrapMgr Module)

Returns the value corresponding to an OID.

Syntax

• Swift
• Objective-C

public func value(oid: String) throws -> String

- (NSString*)value:(NSString*)OID;

Remarks

If the OID does not exist in the Objects collection, a trappable error is generated.

Please refer to the SNMPObject type for more information.

BadPacket Event (SNMPTrapMgr Module)

Fired for erroneous and/or malformed messages.

Syntax

• Swift
• Objective-C

func onBadPacket(packet: Data, sourceAddress: String, sourcePort: Int32, errorCode: Int32, errorDescription: String, report: inout Bool)

- (void)onBadPacket:(NSData*)packet :(NSString*)sourceAddress :(int)sourcePort :(int)errorCode :(NSString*)errorDescription :(int*)report;

Remarks

The full message is provided in the Packet parameter.

The BadPacket event is also fired when authentication fails for received packets due to a bad password or other reasons.

If the Report parameter is set to True, an unauthenticated error report will be sent to the client, otherwise the packet will be silently ignored.

Please refer to the GetUserPassword event for more information concerning SNMPv3 authentication.

CacheEntry Event (SNMPTrapMgr Module)

Shows engines and users in the internal cache.

Syntax

• Swift
• Objective-C

func onCacheEntry(engineId: Data, engineBoots: Int32, engineTime: Int32, user: String, authenticationProtocol: String, authenticationPassword: String, encryptionAlgorithm: String, encryptionPassword: String)

- (void)onCacheEntry:(NSData*)engineId :(int)engineBoots :(int)engineTime :(NSString*)user :(NSString*)authenticationProtocol :(NSString*)authenticationPassword :(NSString*)encryptionAlgorithm :(NSString*)encryptionPassword;

Remarks

CacheEntry events are triggered by a call to ShowCache. One event is fired for each user and engine. If there are no users for a particular engine, a single event is fired with the engine information, but empty values for user information.

CheckEngine Event (SNMPTrapMgr Module)

Fired to check engine parameters (timeliness, etc.).

Syntax

• Swift
• Objective-C

func onCheckEngine(engineId: Data, engineBoots: Int32, engineTime: Int32, user: String, securityLevel: Int32, remoteAddress: String, remotePort: Int32, isNew: Bool, accept: inout Bool)

- (void)onCheckEngine:(NSData*)engineId :(int)engineBoots :(int)engineTime :(NSString*)user :(int)securityLevel :(NSString*)remoteAddress :(int)remotePort :(BOOL)isNew :(int*)accept;

Remarks

The Accept parameter determines if the engine will be accepted or not. If you set Accept to False prior to exiting the event, the processing on the message will stop and a BadPacket event will be fired.

The default value of Accept is True if and only if:

a) the engine already exists in the internal authentication cache (the IsNew parameter is False) and the timeliness has been verified;

b) the engine does not exist in the internal authentication cache (the IsNew parameter is True), but the packet has been authenticated by the class (SecurityLevel >= 1).

In all other cases, the default value for Accept is False, and you are responsible for accepting or not accepting the engine based on other considerations.

If Accept is true upon event exit, then:

a) if the engine already exists in the internal authentication cache, its time is updated to reflect the new time and the processing of the packet continues;

b) if the engine does not exist in the internal authentication cache, it is added there and if User is authenticated, the User will be added too.

DiscoveryRequest Event (SNMPTrapMgr Module)

Fired when an SNMPv3 discovery packet is received.

Syntax

• Swift
• Objective-C

func onDiscoveryRequest(engineId: Data, engineBoots: Int32, engineTime: Int32, user: String, securityLevel: Int32, sourceAddress: String, sourcePort: Int32, respond: inout Bool)

- (void)onDiscoveryRequest:(NSData*)engineId :(int)engineBoots :(int)engineTime :(NSString*)user :(int)securityLevel :(NSString*)sourceAddress :(int)sourcePort :(int*)respond;

Remarks

EngineId, EngineBoots, EngineTime, and User are the values received from SourceAddress.

For SNMPv3, the User parameter shows the user that was supplied with the packet. This parameter MUST be used together with the SecurityLevel parameter which shows the level of security in the message.

The SecurityLevel parameter shows whether the request has been authenticated. If SecurityLevel is 0, the request has NOT been authenticated (i.e. the packet signature has not been verified). For an authenticated, non encrypted request, SecurityLevel is 1. For an authenticated and encrypted request, SecurityLevel is 2.

Respond is True by default, and will automatically send a response using the value in LocalEngineId. To suppress the response, set Respond to False.

The value returned to SourceAddress for EngineBoots is always 0, and EngineTime is the number of seconds since January 1st, 1970 (GMT).

Error Event (SNMPTrapMgr Module)

Fired when information is available about errors during data delivery.

Syntax

• Swift
• Objective-C

func onError(errorCode: Int32, description: String)

- (void)onError:(int)errorCode :(NSString*)description;

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class .

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

GetUserPassword Event (SNMPTrapMgr Module)

Retrieves a password associated with a user.

Syntax

• Swift
• Objective-C

func onGetUserPassword(passwordType: Int32, user: String, engineId: Data, password: inout String, algorithm: inout Int32)

- (void)onGetUserPassword:(int)passwordType :(NSString*)user :(NSData*)engineId :(NSString**)password :(int*)algorithm;

Remarks

The GetUserPassword event is fired after initial inspection of SNMPv3 requests.

The type of password required is provided in the PasswordType parameter: 1 for authentication, and 2 for encryption (privacy).

The password corresponding to User and EngineId must be provided in the Password parameter. If the password is valid, processing will continue to other events such as GetRequest, SetRequest, etc.

If the PasswordType parameter is 1 (authentication is used), the Algorithm parameter can be set. Possible values are:

If the password does not match the signature in the request, a BadPacket event will be fired, at which point you can decide whether to report the error to the client (see the description of the BadPacket event for more information).

If the User is invalid or unknown, set the password to empty string (default) to ignore the request. This will result in a BadPacket event being fired, at which point you can decide whether to report the error to the client or not.

GetUserSecurityLevel Event (SNMPTrapMgr Module)

Sets the security level for an incoming packet.

Syntax

• Swift
• Objective-C

func onGetUserSecurityLevel(user: String, engineId: Data, securityLevel: inout Int32)

- (void)onGetUserSecurityLevel:(NSString*)user :(NSData*)engineId :(int*)securityLevel;

Remarks

The GetUserSecurityLevel event is fired after the first inspection of each SNMPv3 request. The SecurityLevel parameter determines the level of security for the message.

On entry, the SecurityLevel parameter contains the default security level for User if the user is located in the internal cache, or if the User is not found in the cache, the SecurityLevel will be -1.

The value of SecurityLevel upon exiting the event, determines how the message will be processed:

HashPassword Event (SNMPTrapMgr Module)

Fired before and after a password is hashed.

Syntax

• Swift
• Objective-C

func onHashPassword(password: String, authAlgorithm: Int32, hash: inout String)

- (void)onHashPassword:(NSString*)password :(int)authAlgorithm :(NSString**)hash;

Remarks

SNMPv3 passwords are hashed in order to obtain authentication and encryption keys. This is an expensive operation, and in certain situations it may be preferable to store the hashed passwords externally and supply them on demand.

If a hash is required, the event fires with an empty string in the Hash parameter. In this case, you can choose to supply a value for the hash and stop the class from computing the hash.

The event also fires every time a hash is computed. In this case, the Hash parameter contains the value of the computed hash.

AuthAlgorithm contains either 1 for HMAC-MD5-96, 2 for HMAC-SHA-96 or 3 for HMAC-192-SHA-256

InformRequest Event (SNMPTrapMgr Module)

Fired when an InformRequest packet is received.

Syntax

• Swift
• Objective-C

func onInformRequest(requestId: Int32, snmpVersion: Int32, community: String, user: String, securityLevel: Int32, sourceAddress: String, sourcePort: Int32, errorIndex: inout Int32, errorStatus: inout Int32, errorDescription: String, respond: inout Bool)

- (void)onInformRequest:(int)requestId :(int)SNMPVersion :(NSString*)community :(NSString*)user :(int)securityLevel :(NSString*)sourceAddress :(int)sourcePort :(int*)errorIndex :(int*)errorStatus :(NSString*)errorDescription :(int*)respond;

Remarks

For SNMPv3, the User parameter shows the user that was supplied with the packet. This parameter MUST be used together with the SecurityLevel parameter which shows the level of security in the message.

The SecurityLevel parameter shows whether the request has been authenticated. If SecurityLevel is 0, the request has NOT been authenticated (i.e. the packet signature has not been verified). For an authenticated, non encrypted request, SecurityLevel is 1. For an authenticated and encrypted request, SecurityLevel is 2.

The user in an InformRequest packet (SNMPv3) must be a valid user in the internal authentication cache (see the AddUser method and the CheckEngine event for more information). If not, the request is rejected, and a BadPacket event is fired before InformRequest is fired.

The list of variables in the SNMP packet, including optional values and types, is provided through the Objects collection. Each object is of type SNMPObject. This type describes the ObjectsOid, ObjectsObjectType, and ObjectsValue of each SNMP object. These variables must be copied to another location before the event has completed executing, or they may be overridden by other events.

The SourceAddress and SourcePort parameters show the address and port of the sender as reported by the TCP/IP stack.

The MessageId parameter identifies the received request.

For SNMPv3, the User parameter shows the user that was supplied with the packet. This parameter MUST be used together with the SecurityLevel parameter which shows the level of security in the message.

The SecurityLevel parameter shows whether the request has been authenticated. If SecurityLevel is 0, the request has NOT been authenticated (i.e. the packet signature has not been verified). For an authenticated, non encrypted request, SecurityLevel is 1. For an authenticated and encrypted request, SecurityLevel is 2.

To send a response, the Respond parameter must be set to true. By default, this value is false, which means no response will be sent. The ErrorStatus parameter may also be set to a valid SNMP status code (the default value is 0, which represents no error).

The following is a list of valid SNMP status code values:

Variable indexes start with 0. ErrorIndex has no meaning when ErrorStatus is 0 (no error).

PacketTrace Event (SNMPTrapMgr Module)

Fired for every packet sent or received.

Syntax

• Swift
• Objective-C

func onPacketTrace(packet: Data, direction: Int32, packetAddress: String, packetPort: Int32)

- (void)onPacketTrace:(NSData*)packet :(int)direction :(NSString*)packetAddress :(int)packetPort;

Remarks

The PacketTrace event shows all the packets sent or received by the class.

Packet contains the full contents of the datagram.

Direction shows the direction of the packet: 1 for incoming packets, and 2 for outgoing packets.

In the case of an incoming packet, PacketAddress and PacketPort identify the source of the packet.

In the case of an outgoing packet, PacketAddress and PacketPort identify the destination of the packet.

Trap Event (SNMPTrapMgr Module)

Fired when a SNMP trap packet is received.

Syntax

• Swift
• Objective-C

func onTrap(requestId: Int32, snmpVersion: Int32, community: String, user: String, securityLevel: Int32, trapOID: String, timeStamp: Int64, agentAddress: String, sourceAddress: String, sourcePort: Int32)

- (void)onTrap:(int)requestId :(int)SNMPVersion :(NSString*)community :(NSString*)user :(int)securityLevel :(NSString*)trapOID :(long long)timeStamp :(NSString*)agentAddress :(NSString*)sourceAddress :(int)sourcePort;

Remarks

The TrapOID and TimeStamp parameters contain the Trap OID and TimeStamp. In the case of an SNMPv1 trap, there are two possible scenarios:

First, if the enterprise of the trap is "1.3.6.1.6.3.1.1.5", TrapOID will be a concatenation of TrapEnterprise and GenericTrap + 1. For instance a TrapOID of "1.3.6.1.6.3.1.1.5.5" has a TrapEnterprise of "1.3.6.1.6.3.1.1.5" and a GenericTrap of "4".

Second, In all other cases TrapOID will be a concatenation of the values for TrapEnterprise, GenericTrap, and SpecificTrap, separated by '.'.

For SNMPv2 and above, they are read from the variable-value list (if available).

For SNMPv3, the User parameter shows the user that was supplied with the packet. This parameter MUST be used together with the SecurityLevel parameter which shows the level of security in the message.

The SecurityLevel parameter shows whether the request has been authenticated. If SecurityLevel is 0, the request has NOT been authenticated (i.e. the packet signature has not been verified). For an authenticated, non encrypted request, SecurityLevel is 1. For an authenticated and encrypted request, SecurityLevel is 2.

The list of variables in the SNMP packet, including optional values and types, is provided through the Objects collection. Each object is of type SNMPObject. This type describes the ObjectsOid, ObjectsObjectType, and ObjectsValue of each SNMP object. These variables must be copied to another location before the event has completed executing, or they may be overridden by other events.

The SourceAddress and SourcePort parameters show the address and port of the sender as reported by the TCP/IP stack.

Some parameters are only applicable depending on the SNMPVersion value. The table below shows which parameters are applicable to which SNMP versions.

SNMPObject Type

The current SNMP object.

Remarks

This type defines an SNMP object. Each object has an , , and . These values are populated by the class when incoming packets are received. You may use these fields to define objects to be used in outgoing packets.

Fields

Constructors

public init()

public init(oid: )

public init(oid: , value: )

Config Settings (SNMPTrapMgr Module)

SNMPTrapMgr Config Settings

UDP Config Settings

Socket Config Settings

Base Config Settings

Trappable Errors (SNMPTrapMgr Module)

SNMPTrapMgr Errors

UDP Errors

SSL Errors

TCP/IP Errors