SNMPMgr Class

Properties   Methods   Events   Config Settings   Errors  

The SNMPMgr class is used to implement UDP-based SNMP Management Applications.

Syntax

SNMPMgr

Remarks

The SNMPMgr class implements a UDP-based standard SNMP Manager as specified in the SNMP RFCs. The class supports SNMP v1, v2c, and v3.

The class provides both encoding/decoding and transport capabilities, making the task of developing a custom SNMP 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 Response, Trap, or InformRequest. SNMP Traps are received through the Trap event.

Messages are sent to other agents or managers by using class's methods such as SendGetRequest, SendGetNextRequest, SendGetBulkRequest, SendSetRequest, and SendInformRequest.

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

SNMPv3 USM security is enabled by setting properties such as User, AuthenticationPassword, and EncryptionPassword and calling the Discover method to bind to a particular agent (RemoteEngineId). Upon successful discovery, received packets are checked for integrity (authentication) and timeliness. Note that the discovery step is optional, and may be avoided if the values for RemoteEngineId, RemoteEngineBoots, and RemoteEngineTime are known in advance and provided to the class through the respective properties.

By default, the class operates synchronously (except for the Discover method), sending a request and waiting until the corresponding response has been received. This behavior may be overridden by setting Timeout to 0, in which case the class returns control immediately after a send, and responses are received exclusively through the Response event.

Property List


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

AcceptDataEnables or disables data reception.
ActiveIndicates whether the class is active.
AuthenticationPasswordThe password used for SNMPv3 authentication.
AuthenticationProtocolThe authentication protocol used for SNMPv3 packets.
CommunityThe community string used to authenticate SNMP packets.
EncryptionAlgorithmThe encryption algorithm used for SNMPv3 packets.
EncryptionPasswordThe password used for SNMPv3 privacy.
ErrorDescriptionDescription of the status code for the last SNMP packet received by the class.
ErrorIndexIndex of the first variable (object) that caused an error from the last SNMP response.
ErrorStatusStatus code for the last SNMP packet received by the class.
LocalEngineIdThe Engine Id of the SNMP Manager.
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPortThe port in the local host where the SNMP Manager is bound to.
ObjCountThe number of records in the Obj arrays.
ObjTypeThe current object's type.
ObjIdThe current object's id which is encoded as a string of numbers separated by periods.
ObjTypeStringA string representation of the current object's ObjectType .
ObjValueThe current object's value.
RemoteEngineBootsThe remote engine boots (SNMPv3).
RemoteEngineIdThe Engine Id of the remote agent.
RemoteEngineTimeThe remote engine time (SNMPv3).
RemoteHostThe address of the remote host. Domain names are resolved to IP addresses.
RemotePortThe port where the remote SNMP agent is listening.
RequestIdThe request-id to mark outgoing packets with.
SNMPVersionVersion of SNMP used for outgoing requests.
StoreWalkObjectsTells the class whether or not to store returned objects.
TimeoutA timeout for the class.
UserThe user name used for SNMPv3 authentication.
WalkLimitThe limit of oid's returned in a walk.

Method List


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

ActivateActivates the class.
ConfigSets or retrieves a configuration setting.
DeactivateDeactivates the class.
DiscoverPerforms SNMPv3 discovery.
DoEventsProcesses events from the internal message queue.
HashPasswordsHashes all passwords in the cache.
InterruptInterrupt the current method.
ResetClears the object arrays.
SendGetBulkRequestSend a GetBulkRequest packet.
SendGetNextRequestSend GetNextRequest packet.
SendGetRequestSend GetRequest packet.
SendInformRequestSend an InformRequest packet.
SendSetRequestSend Set Request packet.
ValueReturns the value corresponding to an OID.
WalkDoes an SNMP walk starting with the specified oid.

Event List


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

BadPacketFired for erroneous and/or malformed messages.
DiscoveryRequestFired when an SNMPv3 discovery packet is received.
DiscoveryResponseFired when an SNMPv3 discovery response is received.
ErrorInformation about errors during data delivery.
HashPasswordFired before and after a password is hashed.
InformRequestFired when an InformRequest packet is received.
PacketTraceFired for every packet sent or received.
ReadyToSendFired when the class is ready to send data.
ReportFired when a Report packet is received.
ResponseFired when a GetResponse packet is received.
TrapFired when a SNMP trap packet is received.

Config Settings


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

AllowSingleStepDiscoveryWhether to allow discovery to be completed in a single step.
CheckMessageOriginWhether to match the origin IP address when receiving responses.
CheckSNMPVersionWhether to check the version of incoming packets.
CompatibilityModeWhether to operate the class in a specific compatibility mode.
ContextEngineIdSets the context engine id of the SNMP entity.
ContextNameSets the context name of the SNMP entity.
DecryptLogPacketsWhether to decrypt logged packets.
ForceLocalPortForces the class to bind to a specific port.
IgnoreDuplicateResponseWhether to ignore duplicate responses.
IgnorePortMismatchWhether to check if the port matches when a response is received.
IncomingContextEngineIdThe engine Id of the received packet.
IncomingContextNameThe context name of the received packet.
MsgMaxSizeThe maximum supported message size.
SourceAddressThe source address of the received packet.
SourcePortThe source port of the received packet.
TimeoutInMillisecondsThe timeout is treated as milliseconds.
WalkInsideRangeStops the SNMP walk if the OID value returned from an agent is outside the table.
WalkStartOIDSpecifies the OID to be used when a Walk is performed.
CaptureIPPacketInfoUsed to capture the packet information.
DelayHostResolutionWhether the hostname is resolved when RemoteHost is set.
DestinationAddressUsed to get the destination address from the packet information.
DontFragmentUsed to set the Don't Fragment flag of outgoing packets.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe port in the local host where the class binds.
MaxPacketSizeThe maximum length of the packets that can be received.
QOSDSCPValueUsed to specify an arbitrary QOS/DSCP setting (optional).
QOSTrafficTypeUsed to specify QOS/DSCP settings (optional).
ShareLocalPortIf set to True, allows more than one instance of the class to be active on the same local port.
SourceIPAddressUsed to set the source IP address used when sending a packet.
SourceMacAddressUsed to set the source MAC address used when sending a packet.
UseConnectionDetermines whether to use a connected socket.
UseIPv6Whether or not to use IPv6.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
BuildInfoInformation about the product's build.
CodePageThe system code page used for Unicode to Multibyte translations.
LicenseInfoInformation about the current license.
MaskSensitiveWhether sensitive data is masked in log messages.
ProcessIdleEventsWhether the class uses its internal event loop to process events when the main thread is idle.
SelectWaitMillisThe length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.
UseInternalSecurityAPITells the class whether or not to use the system security libraries or an internal implementation.

AcceptData Property (SNMPMgr Class)

Enables or disables data reception.

Syntax

ANSI (Cross Platform)
int GetAcceptData();
int SetAcceptData(int bAcceptData); Unicode (Windows) BOOL GetAcceptData();
INT SetAcceptData(BOOL bAcceptData);
int ipworkssnmp_snmpmgr_getacceptdata(void* lpObj);
int ipworkssnmp_snmpmgr_setacceptdata(void* lpObj, int bAcceptData);
bool GetAcceptData();
int SetAcceptData(bool bAcceptData);

Default Value

TRUE

Remarks

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

This property is not available at design time.

Data Type

Boolean

Active Property (SNMPMgr Class)

Indicates whether the class is active.

Syntax

ANSI (Cross Platform)
int GetActive();
int SetActive(int bActive); Unicode (Windows) BOOL GetActive();
INT SetActive(BOOL bActive);
int ipworkssnmp_snmpmgr_getactive(void* lpObj);
int ipworkssnmp_snmpmgr_setactive(void* lpObj, int bActive);
bool GetActive();
int SetActive(bool bActive);

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.

This property is not available at design time.

Data Type

Boolean

AuthenticationPassword Property (SNMPMgr Class)

The password used for SNMPv3 authentication.

Syntax

ANSI (Cross Platform)
char* GetAuthenticationPassword();
int SetAuthenticationPassword(const char* lpszAuthenticationPassword); Unicode (Windows) LPWSTR GetAuthenticationPassword();
INT SetAuthenticationPassword(LPCWSTR lpszAuthenticationPassword);
char* ipworkssnmp_snmpmgr_getauthenticationpassword(void* lpObj);
int ipworkssnmp_snmpmgr_setauthenticationpassword(void* lpObj, const char* lpszAuthenticationPassword);
QString GetAuthenticationPassword();
int SetAuthenticationPassword(QString qsAuthenticationPassword);

Default Value

""

Remarks

Every time EncryptionPassword, AuthenticationPassword, or RemoteEngineId are set, a localized key is computed automatically, and cached internally.

Data Type

String

AuthenticationProtocol Property (SNMPMgr Class)

The authentication protocol used for SNMPv3 packets.

Syntax

ANSI (Cross Platform)
int GetAuthenticationProtocol();
int SetAuthenticationProtocol(int iAuthenticationProtocol); Unicode (Windows) INT GetAuthenticationProtocol();
INT SetAuthenticationProtocol(INT iAuthenticationProtocol);

Possible Values

AUTHP_HMACMD596(1), 
AUTHP_HMACSHA96(2),
AUTHP_HMAC192SHA256(3),
AUTHP_HMAC384SHA512(4)
int ipworkssnmp_snmpmgr_getauthenticationprotocol(void* lpObj);
int ipworkssnmp_snmpmgr_setauthenticationprotocol(void* lpObj, int iAuthenticationProtocol);
int GetAuthenticationProtocol();
int SetAuthenticationProtocol(int iAuthenticationProtocol);

Default Value

1

Remarks

This property defines the authentication protocol used when SNMPVersion is set to snmpverV3. Possible values are:

  • 1 (HMAC-MD5-96 - default)
  • 2 (HMAC-SHA-96)
  • 3 (HMAC-192-SHA-256)
  • 4 (HMAC-384-SHA-512)

This property is not available at design time.

Data Type

Integer

Community Property (SNMPMgr Class)

The community string used to authenticate SNMP packets.

Syntax

ANSI (Cross Platform)
char* GetCommunity();
int SetCommunity(const char* lpszCommunity); Unicode (Windows) LPWSTR GetCommunity();
INT SetCommunity(LPCWSTR lpszCommunity);
char* ipworkssnmp_snmpmgr_getcommunity(void* lpObj);
int ipworkssnmp_snmpmgr_setcommunity(void* lpObj, const char* lpszCommunity);
QString GetCommunity();
int SetCommunity(QString qsCommunity);

Default Value

"public"

Remarks

Must match the community name that is specified on the agent.

Typical values are "public" or "private".

This property is used for all SNMP packets sent by the class.

Data Type

String

EncryptionAlgorithm Property (SNMPMgr Class)

The encryption algorithm used for SNMPv3 packets.

Syntax

ANSI (Cross Platform)
int GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(int iEncryptionAlgorithm); Unicode (Windows) INT GetEncryptionAlgorithm();
INT SetEncryptionAlgorithm(INT iEncryptionAlgorithm);

Possible Values

ENCRA_DES(1), 
ENCRA_AES(2),
ENCRA_3DES(3),
ENCRA_AES192(4),
ENCRA_AES256(5)
int ipworkssnmp_snmpmgr_getencryptionalgorithm(void* lpObj);
int ipworkssnmp_snmpmgr_setencryptionalgorithm(void* lpObj, int iEncryptionAlgorithm);
int GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(int iEncryptionAlgorithm);

Default Value

1

Remarks

In order to use encryption, you must set the EncryptionPassword property. The supported algorithms for encryption are:

DES (1)Data Encryption Standard.
AES (2)Advanced Encryption Standard with key length of 128.
3DES (3)Triple Data Encryption Standard.
AES192 (4)Advanced Encryption Standard with key length of 192.
AES256 (5)Advanced Encryption Standard with key length of 256.

This property is not available at design time.

Data Type

Integer

EncryptionPassword Property (SNMPMgr Class)

The password used for SNMPv3 privacy.

Syntax

ANSI (Cross Platform)
char* GetEncryptionPassword();
int SetEncryptionPassword(const char* lpszEncryptionPassword); Unicode (Windows) LPWSTR GetEncryptionPassword();
INT SetEncryptionPassword(LPCWSTR lpszEncryptionPassword);
char* ipworkssnmp_snmpmgr_getencryptionpassword(void* lpObj);
int ipworkssnmp_snmpmgr_setencryptionpassword(void* lpObj, const char* lpszEncryptionPassword);
QString GetEncryptionPassword();
int SetEncryptionPassword(QString qsEncryptionPassword);

Default Value

""

Remarks

Every time EncryptionPassword, AuthenticationPassword, or RemoteEngineId are set, a localized key is computed automatically, and cached internally.

Data Type

String

ErrorDescription Property (SNMPMgr Class)

Description of the status code for the last SNMP packet received by the class.

Syntax

ANSI (Cross Platform)
char* GetErrorDescription();

Unicode (Windows)
LPWSTR GetErrorDescription();
char* ipworkssnmp_snmpmgr_geterrordescription(void* lpObj);
QString GetErrorDescription();

Default Value

"0"

Remarks

Please refer to the ErrorStatus property for more information.

This property is read-only and not available at design time.

Data Type

String

ErrorIndex Property (SNMPMgr Class)

Index of the first variable (object) that caused an error from the last SNMP response.

Syntax

ANSI (Cross Platform)
int GetErrorIndex();

Unicode (Windows)
INT GetErrorIndex();
int ipworkssnmp_snmpmgr_geterrorindex(void* lpObj);
int GetErrorIndex();

Default Value

0

Remarks

This property is used in conjunction with the ErrorStatus property, and refers to the object that caused the error reported in the last SNMP response. This value is parsed directly from the SNMP response, which will be a one-based value, so a value of i here maps to index i-1 in the Objects collection.

The ErrorIndex property has no meaning when the ErrorStatus property is 0 (no error).

This property is read-only and not available at design time.

Data Type

Integer

ErrorStatus Property (SNMPMgr Class)

Status code for the last SNMP packet received by the class.

Syntax

ANSI (Cross Platform)
int GetErrorStatus();

Unicode (Windows)
INT GetErrorStatus();
int ipworkssnmp_snmpmgr_geterrorstatus(void* lpObj);
int GetErrorStatus();

Default Value

0

Remarks

This property is used in conjunction with the ErrorIndex property, which denotes the index of the variable in error. The ErrorDescription property provides a textual description of the error.

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

0 (noError) No error.
1 (tooBig) The response cannot fit in a single SNMP message.
2 (noSuchName) Variable does not exist.
3 (badValue) Invalid value or syntax.
4 (readOnly) Variable is read-only.
5 (genError) Other error (SNMPv1).
6 (noAccess) Access denied.
7 (wrongType) Wrong object type.
8 (wrongLength) Wrong length.
9 (wrongEncoding) Wrong encoding.
10 (wrongValue) Wrong value.
11 (noCreation) No creation.
12 (inconsistentValue) Inconsistent value.
13 (resourceUnavailable) Resource unavailable.
14 (commitFailed) Commit failed.
15 (undoFailed) Undo failed.
16 (authorizationError) Authorization error.
17 (notWritable) Variable is not writable.
18 (inconsistentName) Inconsistent name.
The ErrorIndex parameter indicates the index of the first variable (object) that caused an error. The default value is 0.

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

The default value is 0 (no error).

This property is read-only and not available at design time.

Data Type

Integer

LocalEngineId Property (SNMPMgr Class)

The Engine Id of the SNMP Manager.

Syntax

ANSI (Cross Platform)
int GetLocalEngineId(char* &lpLocalEngineId, int &lenLocalEngineId);
int SetLocalEngineId(const char* lpLocalEngineId, int lenLocalEngineId); Unicode (Windows) INT GetLocalEngineId(LPSTR &lpLocalEngineId, INT &lenLocalEngineId);
INT SetLocalEngineId(LPCSTR lpLocalEngineId, INT lenLocalEngineId);
int ipworkssnmp_snmpmgr_getlocalengineid(void* lpObj, char** lpLocalEngineId, int* lenLocalEngineId);
int ipworkssnmp_snmpmgr_setlocalengineid(void* lpObj, const char* lpLocalEngineId, int lenLocalEngineId);
QByteArray GetLocalEngineId();
int SetLocalEngineId(QByteArray qbaLocalEngineId);

Default Value

""

Remarks

This property is only used for SNMPv3 packets (when SNMPVersion is 3).

Data Type

Binary String

LocalHost Property (SNMPMgr Class)

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

Syntax

ANSI (Cross Platform)
char* GetLocalHost();
int SetLocalHost(const char* lpszLocalHost); Unicode (Windows) LPWSTR GetLocalHost();
INT SetLocalHost(LPCWSTR lpszLocalHost);
char* ipworkssnmp_snmpmgr_getlocalhost(void* lpObj);
int ipworkssnmp_snmpmgr_setlocalhost(void* lpObj, const char* lpszLocalHost);
QString GetLocalHost();
int SetLocalHost(QString qsLocalHost);

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.

Data Type

String

LocalPort Property (SNMPMgr Class)

The port in the local host where the SNMP Manager is bound to.

Syntax

ANSI (Cross Platform)
int GetLocalPort();
int SetLocalPort(int iLocalPort); Unicode (Windows) INT GetLocalPort();
INT SetLocalPort(INT iLocalPort);
int ipworkssnmp_snmpmgr_getlocalport(void* lpObj);
int ipworkssnmp_snmpmgr_setlocalport(void* lpObj, int iLocalPort);
int GetLocalPort();
int SetLocalPort(int iLocalPort);

Default Value

0

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 0 (random port). If you would like to receive traps, set LocalPort to 162 (standard trap port). However, it is recommended that the SNMPTrapMgr class be used for listening to traps, because SNMPMgr is limited to receiving SNMPv3 traps from a single agent only. SNMPTrapMgr does not have this limitation.

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.

Data Type

Integer

ObjCount Property (SNMPMgr Class)

The number of records in the Obj arrays.

Syntax

ANSI (Cross Platform)
int GetObjCount();
int SetObjCount(int iObjCount); Unicode (Windows) INT GetObjCount();
INT SetObjCount(INT iObjCount);
int ipworkssnmp_snmpmgr_getobjcount(void* lpObj);
int ipworkssnmp_snmpmgr_setobjcount(void* lpObj, int iObjCount);
int GetObjCount();
int SetObjCount(int iObjCount);

Default Value

0

Remarks

This property controls the size of the following arrays:

The array indices start at 0 and end at ObjCount - 1.

This property is not available at design time.

Data Type

Integer

ObjType Property (SNMPMgr Class)

The current object's type.

Syntax

ANSI (Cross Platform)
int GetObjType(int iObjIndex);
int SetObjType(int iObjIndex, int iObjType); Unicode (Windows) INT GetObjType(INT iObjIndex);
INT SetObjType(INT iObjIndex, INT iObjType);

Possible Values

OT_INTEGER(2), 
OT_OCTET_STRING(4),
OT_NULL(5),
OT_OBJECT_ID(6),
OT_IPADDRESS(64),
OT_COUNTER_32(65),
OT_GAUGE_32(66),
OT_TIME_TICKS(67),
OT_OPAQUE(68),
OT_NSAP(69),
OT_COUNTER_64(70),
OT_UNSIGNED_INTEGER_32(71),
OT_NO_SUCH_OBJECT(128),
OT_NO_SUCH_INSTANCE(129),
OT_END_OF_MIB_VIEW(130)
int ipworkssnmp_snmpmgr_getobjtype(void* lpObj, int objindex);
int ipworkssnmp_snmpmgr_setobjtype(void* lpObj, int objindex, int iObjType);
int GetObjType(int iObjIndex);
int SetObjType(int iObjIndex, int iObjType);

Default Value

5

Remarks

The current object's type. The default type is NULL (5).

The corresponding object id and value are specified by the ObjOid and ObjValue properties.

Possible object type values include:

otInteger (2) 2
otOctetString (4) 4
otNull (5) 5
otObjectID (6) 6
otIPAddress (64)64
otCounter32 (65)65
otGauge32 (66)66
otTimeTicks (67)67
otOpaque (68)68
otNSAP (69)69
otCounter64 (70)70
otUnsignedInteger32 (71)71

The class also supports the following artificial object values used to designate error conditions:

otNoSuchObject (128)No such object error.
otNoSuchInstance (129)No such instance error.
otEndOfMibView (130)End of MIB View error.

The ObjIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjCount property.

This property is not available at design time.

Data Type

Integer

ObjId Property (SNMPMgr Class)

The current object's id which is encoded as a string of numbers separated by periods.

Syntax

ANSI (Cross Platform)
char* GetObjId(int iObjIndex);
int SetObjId(int iObjIndex, const char* lpszObjId); Unicode (Windows) LPWSTR GetObjId(INT iObjIndex);
INT SetObjId(INT iObjIndex, LPCWSTR lpszObjId);
char* ipworkssnmp_snmpmgr_getobjid(void* lpObj, int objindex);
int ipworkssnmp_snmpmgr_setobjid(void* lpObj, int objindex, const char* lpszObjId);
QString GetObjId(int iObjIndex);
int SetObjId(int iObjIndex, QString qsObjId);

Default Value

""

Remarks

The current object's id which is encoded as a string of numbers separated by periods. For instance: "1.3.6.1.2.1.1.1.0" (OID for "system description").

The corresponding object type and value (if any) are specified by the ObjectType and ObjValue properties.

Example

SNMPControl.ObjCount = 1 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0"

The ObjIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjCount property.

This property is not available at design time.

Data Type

String

ObjTypeString Property (SNMPMgr Class)

A string representation of the current object's ObjectType .

Syntax

ANSI (Cross Platform)
char* GetObjTypeString(int iObjIndex);

Unicode (Windows)
LPWSTR GetObjTypeString(INT iObjIndex);
char* ipworkssnmp_snmpmgr_getobjtypestring(void* lpObj, int objindex);
QString GetObjTypeString(int iObjIndex);

Default Value

""

Remarks

A string representation of the current object's ObjectType.

The corresponding object id and value are specified by the ObjOid and ObjValue properties.

The ObjIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjCount property.

This property is read-only and not available at design time.

Data Type

String

ObjValue Property (SNMPMgr Class)

The current object's value.

Syntax

ANSI (Cross Platform)
int GetObjValue(int iObjIndex, char* &lpObjValue, int &lenObjValue);
int SetObjValue(int iObjIndex, const char* lpObjValue, int lenObjValue); Unicode (Windows) INT GetObjValue(INT iObjIndex, LPSTR &lpObjValue, INT &lenObjValue);
INT SetObjValue(INT iObjIndex, LPCSTR lpObjValue, INT lenObjValue);
int ipworkssnmp_snmpmgr_getobjvalue(void* lpObj, int objindex, char** lpObjValue, int* lenObjValue);
int ipworkssnmp_snmpmgr_setobjvalue(void* lpObj, int objindex, const char* lpObjValue, int lenObjValue);
QByteArray GetObjValue(int iObjIndex);
int SetObjValue(int iObjIndex, QByteArray qbaObjValue);

Default Value

""

Remarks

The current object's value. The corresponding object id and type are specified by the ObjOid and ObjectType properties.

Example

SNMPControl.ObjCount = 1 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0" SNMPControl.ObjValue(0) = "New Value"

The ObjIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjCount property.

This property is not available at design time.

Data Type

Binary String

RemoteEngineBoots Property (SNMPMgr Class)

The remote engine boots (SNMPv3).

Syntax

ANSI (Cross Platform)
int GetRemoteEngineBoots();
int SetRemoteEngineBoots(int iRemoteEngineBoots); Unicode (Windows) INT GetRemoteEngineBoots();
INT SetRemoteEngineBoots(INT iRemoteEngineBoots);
int ipworkssnmp_snmpmgr_getremoteengineboots(void* lpObj);
int ipworkssnmp_snmpmgr_setremoteengineboots(void* lpObj, int iRemoteEngineBoots);
int GetRemoteEngineBoots();
int SetRemoteEngineBoots(int iRemoteEngineBoots);

Default Value

0

Remarks

This property is used in conjunction with the RemoteEngineTime property. Please refer to the description of the RemoteEngineTime property, and the Discover method for further information.

Data Type

Integer

RemoteEngineId Property (SNMPMgr Class)

The Engine Id of the remote agent.

Syntax

ANSI (Cross Platform)
int GetRemoteEngineId(char* &lpRemoteEngineId, int &lenRemoteEngineId);
int SetRemoteEngineId(const char* lpRemoteEngineId, int lenRemoteEngineId); Unicode (Windows) INT GetRemoteEngineId(LPSTR &lpRemoteEngineId, INT &lenRemoteEngineId);
INT SetRemoteEngineId(LPCSTR lpRemoteEngineId, INT lenRemoteEngineId);
int ipworkssnmp_snmpmgr_getremoteengineid(void* lpObj, char** lpRemoteEngineId, int* lenRemoteEngineId);
int ipworkssnmp_snmpmgr_setremoteengineid(void* lpObj, const char* lpRemoteEngineId, int lenRemoteEngineId);
QByteArray GetRemoteEngineId();
int SetRemoteEngineId(QByteArray qbaRemoteEngineId);

Default Value

""

Remarks

This property is only used for SNMPv3 packets (see SNMPVersion), and is reset every time RemoteHost or RemotePort changes.

RemoteEngineId is normally discovered through the Discover method. However, by manually supplying a value for the property, RemoteEngineId discovery step may be eliminated, thus avoiding the extra roundtrip to the agent (RemoteEngineBoots and RemoteEngineTime are also required for User authentication - please refer to the Discover method for more information).

Data Type

Binary String

RemoteEngineTime Property (SNMPMgr Class)

The remote engine time (SNMPv3).

Syntax

ANSI (Cross Platform)
int GetRemoteEngineTime();
int SetRemoteEngineTime(int iRemoteEngineTime); Unicode (Windows) INT GetRemoteEngineTime();
INT SetRemoteEngineTime(INT iRemoteEngineTime);
int ipworkssnmp_snmpmgr_getremoteenginetime(void* lpObj);
int ipworkssnmp_snmpmgr_setremoteenginetime(void* lpObj, int iRemoteEngineTime);
int GetRemoteEngineTime();
int SetRemoteEngineTime(int iRemoteEngineTime);

Default Value

0

Remarks

RemoteEngineTime is used by SNMPv3 authentication to ensure timeliness of requests, and avoid replay attacks.

The value of RemoteEngineTime is provided as what is expected to be the current value of the remote engine clock based on a cached time differential between the remote engine clock and the local engine time obtained during the discovery process (see Discover).

This property is used in conjunction with RemoteEngineBoots. Please refer to the RemoteEngineBoots property and the Discover method for more information.

Data Type

Integer

RemoteHost Property (SNMPMgr Class)

The address of the remote host. Domain names are resolved to IP addresses.

Syntax

ANSI (Cross Platform)
char* GetRemoteHost();
int SetRemoteHost(const char* lpszRemoteHost); Unicode (Windows) LPWSTR GetRemoteHost();
INT SetRemoteHost(LPCWSTR lpszRemoteHost);
char* ipworkssnmp_snmpmgr_getremotehost(void* lpObj);
int ipworkssnmp_snmpmgr_setremotehost(void* lpObj, const char* lpszRemoteHost);
QString GetRemoteHost();
int SetRemoteHost(QString qsRemoteHost);

Default Value

""

Remarks

The RemoteHost property specifies the IP address (IP number in dotted internet format) or Domain Name of the host SNMP requests or traps are sent to.

If RemoteHost is set to 255.255.255.255, the class broadcasts data on the local subnet.

If the RemoteHost property is set to a Domain Name, a DNS request is initiated and upon successful termination of the request, the RemoteHost property is set to the corresponding address. If the search is not successful, an error is returned.

Data Type

String

RemotePort Property (SNMPMgr Class)

The port where the remote SNMP agent is listening.

Syntax

ANSI (Cross Platform)
int GetRemotePort();
int SetRemotePort(int iRemotePort); Unicode (Windows) INT GetRemotePort();
INT SetRemotePort(INT iRemotePort);
int ipworkssnmp_snmpmgr_getremoteport(void* lpObj);
int ipworkssnmp_snmpmgr_setremoteport(void* lpObj, int iRemotePort);
int GetRemotePort();
int SetRemotePort(int iRemotePort);

Default Value

161

Remarks

The RemotePort is the port on the RemoteHost to send SNMP requests to.

A valid port number (a value between 1 and 65535) is required. The default value is 161.

Data Type

Integer

RequestId Property (SNMPMgr Class)

The request-id to mark outgoing packets with.

Syntax

ANSI (Cross Platform)
int GetRequestId();
int SetRequestId(int iRequestId); Unicode (Windows) INT GetRequestId();
INT SetRequestId(INT iRequestId);
int ipworkssnmp_snmpmgr_getrequestid(void* lpObj);
int ipworkssnmp_snmpmgr_setrequestid(void* lpObj, int iRequestId);
int GetRequestId();
int SetRequestId(int iRequestId);

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.

This property is not available at design time.

Data Type

Integer

SNMPVersion Property (SNMPMgr Class)

Version of SNMP used for outgoing requests.

Syntax

ANSI (Cross Platform)
int GetSNMPVersion();
int SetSNMPVersion(int iSNMPVersion); Unicode (Windows) INT GetSNMPVersion();
INT SetSNMPVersion(INT iSNMPVersion);

Possible Values

SNMPVER_V1(1), 
SNMPVER_V2C(2),
SNMPVER_V3(3)
int ipworkssnmp_snmpmgr_getsnmpversion(void* lpObj);
int ipworkssnmp_snmpmgr_setsnmpversion(void* lpObj, int iSNMPVersion);
int GetSNMPVersion();
int SetSNMPVersion(int iSNMPVersion);

Default Value

2

Remarks

This property takes one of the following values:

snmpverV1 (1)SNMP Version 1.
snmpverV2c (2)SNMP Version 2c.
snmpverV3 (3)SNMP Version 3.

Data Type

Integer

StoreWalkObjects Property (SNMPMgr Class)

Tells the class whether or not to store returned objects.

Syntax

ANSI (Cross Platform)
int GetStoreWalkObjects();
int SetStoreWalkObjects(int bStoreWalkObjects); Unicode (Windows) BOOL GetStoreWalkObjects();
INT SetStoreWalkObjects(BOOL bStoreWalkObjects);
int ipworkssnmp_snmpmgr_getstorewalkobjects(void* lpObj);
int ipworkssnmp_snmpmgr_setstorewalkobjects(void* lpObj, int bStoreWalkObjects);
bool GetStoreWalkObjects();
int SetStoreWalkObjects(bool bStoreWalkObjects);

Default Value

TRUE

Remarks

When a Walk is performed, this property tells the class whether or not to store the objects that are returned by the server in the Objects collection. If the data is accumulated through the events, and not desired to be saved by the class, set this property to false.

Data Type

Boolean

Timeout Property (SNMPMgr Class)

A timeout for the class.

Syntax

ANSI (Cross Platform)
int GetTimeout();
int SetTimeout(int iTimeout); Unicode (Windows) INT GetTimeout();
INT SetTimeout(INT iTimeout);
int ipworkssnmp_snmpmgr_gettimeout(void* lpObj);
int ipworkssnmp_snmpmgr_settimeout(void* lpObj, int iTimeout);
int GetTimeout();
int SetTimeout(int iTimeout);

Default Value

60

Remarks

If the Timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.

If Timeout is set to a positive value, data is sent in a blocking manner and the class will wait for the operation to complete before returning control. The class will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of Timeout seconds.

The class will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the class fails with an error.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

Data Type

Integer

User Property (SNMPMgr Class)

The user name used for SNMPv3 authentication.

Syntax

ANSI (Cross Platform)
char* GetUser();
int SetUser(const char* lpszUser); Unicode (Windows) LPWSTR GetUser();
INT SetUser(LPCWSTR lpszUser);
char* ipworkssnmp_snmpmgr_getuser(void* lpObj);
int ipworkssnmp_snmpmgr_setuser(void* lpObj, const char* lpszUser);
QString GetUser();
int SetUser(QString qsUser);

Default Value

""

Remarks

If authentication is desired, this property must be set before the class attempts to connect to an SNMPv3 Agent.

Data Type

String

WalkLimit Property (SNMPMgr Class)

The limit of oid's returned in a walk.

Syntax

ANSI (Cross Platform)
int GetWalkLimit();
int SetWalkLimit(int iWalkLimit); Unicode (Windows) INT GetWalkLimit();
INT SetWalkLimit(INT iWalkLimit);
int ipworkssnmp_snmpmgr_getwalklimit(void* lpObj);
int ipworkssnmp_snmpmgr_setwalklimit(void* lpObj, int iWalkLimit);
int GetWalkLimit();
int SetWalkLimit(int iWalkLimit);

Default Value

0

Remarks

This property specifies the limit of how many oid's are to be traversed during an SNMP Walk. If set to 0, the class will traverse all oid's in the specified table that are lexographically greater than the value of the specified table oid.

Data Type

Integer

Activate Method (SNMPMgr Class)

Activates the class.

Syntax

ANSI (Cross Platform)
int Activate();

Unicode (Windows)
INT Activate();
int ipworkssnmp_snmpmgr_activate(void* lpObj);
int 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.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Config Method (SNMPMgr Class)

Sets or retrieves a configuration setting.

Syntax

ANSI (Cross Platform)
char* Config(const char* lpszConfigurationString);

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);
char* ipworkssnmp_snmpmgr_config(void* lpObj, const char* lpszConfigurationString);
QString Config(const QString& qsConfigurationString);

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.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Deactivate Method (SNMPMgr Class)

Deactivates the class.

Syntax

ANSI (Cross Platform)
int Deactivate();

Unicode (Windows)
INT Deactivate();
int ipworkssnmp_snmpmgr_deactivate(void* lpObj);
int 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.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Discover Method (SNMPMgr Class)

Performs SNMPv3 discovery.

Syntax

ANSI (Cross Platform)
int Discover();

Unicode (Windows)
INT Discover();
int ipworkssnmp_snmpmgr_discover(void* lpObj);
int Discover();

Remarks

When the method is called an SNMPv3 engine discovery request is sent to RemoteHost.

If an AuthenticationPassword is provided, the engine id discovery request is followed by an engine time discovery request, as required by the SNMPv3 User Security Model (USM). In this case Timeout must be set to a non-zero value before calling Discover and the class will wait until a response is received from RemoteHost.

The DiscoveryResponse event is fired upon receipt of a valid discovery response and the values of RemoteEngineId, RemoteEngineBoots, and RemoteEngineTime will then be updated with the received Engine Id, Time, and Boots.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

DoEvents Method (SNMPMgr Class)

Processes events from the internal message queue.

Syntax

ANSI (Cross Platform)
int DoEvents();

Unicode (Windows)
INT DoEvents();
int ipworkssnmp_snmpmgr_doevents(void* lpObj);
int 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.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

HashPasswords Method (SNMPMgr Class)

Hashes all passwords in the cache.

Syntax

ANSI (Cross Platform)
int HashPasswords();

Unicode (Windows)
INT HashPasswords();
int ipworkssnmp_snmpmgr_hashpasswords(void* lpObj);
int 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.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Interrupt Method (SNMPMgr Class)

Interrupt the current method.

Syntax

ANSI (Cross Platform)
int Interrupt();

Unicode (Windows)
INT Interrupt();
int ipworkssnmp_snmpmgr_interrupt(void* lpObj);
int Interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Reset Method (SNMPMgr Class)

Clears the object arrays.

Syntax

ANSI (Cross Platform)
int Reset();

Unicode (Windows)
INT Reset();
int ipworkssnmp_snmpmgr_reset(void* lpObj);
int 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).

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendGetBulkRequest Method (SNMPMgr Class)

Send a GetBulkRequest packet.

Syntax

ANSI (Cross Platform)
int SendGetBulkRequest(int iNonRepeaters, int iMaxRepetitions);

Unicode (Windows)
INT SendGetBulkRequest(INT iNonRepeaters, INT iMaxRepetitions);
int ipworkssnmp_snmpmgr_sendgetbulkrequest(void* lpObj, int iNonRepeaters, int iMaxRepetitions);
int SendGetBulkRequest(int iNonRepeaters, int iMaxRepetitions);

Remarks

Sends a GetBulkRequest packet. This is only available for SNMP versions 2 and 3.

NonRepeaters specifies the number of variables for which a single lexicographic successor is to be returned.

MaxRepetitions specifies the number of lexicographic successors to be returned for variables other than those in the NonRepeaters list.

The object identifiers, types, and values for the request are taken from the Objects collection.

A GetBulkRequest is very similar to a GetNextRequest, the difference is that Getbulk performs a continuous GetNext operation based on the MaxRepitions value. The NonRepeaters value will determine the number of Objects for which a simple GetNext operation should be performed. For the remaining variables, a continuous GetNext operation is performed based on the MaxRepitions value.

So if you send a request containing X objects, the agent will perform N simple GetNext operations and M continuous GetNext operations X - N times. With X being the number of objects received, N being the number of NonRepeaters, and M being the number of MaxRepitions. Thus the SNMPMgr is expecting to receive N + M x (X - N) objects, assuming that each object has M successors.

Example (Sending a GetBulk Request)

SNMPControl.RemoteHost = "MyAgent" SNMPControl.ObjCount = 2 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0" SNMPControl.objId(1) = "1.3.6.1.2.1.1.3.0" SNMPControl.SendGetBulkRequest(1,4)

The code sample above will send a GetBulkRequest with 1 non repeater, and a maxrepetitions of 4. Since there is only 1 non repeater, only one ObjID will "not repeat" and will only return one successor. The rest of the ObjID's (in this case, only 1) will return 4 successors. This particular example will return the following ObjID's:

1 1.3.6.1.2.1.1.2.0
2 1.3.6.1.2.1.1.4.0
3 1.3.6.1.2.1.1.5.0
4 1.3.6.1.2.1.1.6.0
5 1.3.6.1.2.1.1.7.0

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendGetNextRequest Method (SNMPMgr Class)

Send GetNextRequest packet.

Syntax

ANSI (Cross Platform)
int SendGetNextRequest();

Unicode (Windows)
INT SendGetNextRequest();
int ipworkssnmp_snmpmgr_sendgetnextrequest(void* lpObj);
int SendGetNextRequest();

Remarks

Sends a GetNextRequest packet. The object identifiers, types, and values for the request are taken from the Objects collection.

Example (Sending a GetNext Request)

SNMPControl.ObjCount = 2 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0" SNMPControl.SendGetNextRequest() The agent will respond with the "next" (relative to the ObjID(s) you specify) OID in the table.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendGetRequest Method (SNMPMgr Class)

Send GetRequest packet.

Syntax

ANSI (Cross Platform)
int SendGetRequest();

Unicode (Windows)
INT SendGetRequest();
int ipworkssnmp_snmpmgr_sendgetrequest(void* lpObj);
int SendGetRequest();

Remarks

Sends a GetRequest packet. The object identifiers, types, and values for the request are taken from the Objects collection.

Example (Sending a GetRequest)

SNMPControl.RemoteHost = "MyAgent" SNMPControl.ObjCount = 2 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0" SNMPControl.ObjId(1) = "1.3.6.1.2.1.1.2.0" SNMPControl.SendGetRequest()

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendInformRequest Method (SNMPMgr Class)

Send an InformRequest packet.

Syntax

ANSI (Cross Platform)
int SendInformRequest();

Unicode (Windows)
INT SendInformRequest();
int ipworkssnmp_snmpmgr_sendinformrequest(void* lpObj);
int SendInformRequest();

Remarks

Sends an InformRequest packet. The object identifiers, types, and values for the request are taken from the Objects collection.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendSetRequest Method (SNMPMgr Class)

Send Set Request packet.

Syntax

ANSI (Cross Platform)
int SendSetRequest();

Unicode (Windows)
INT SendSetRequest();
int ipworkssnmp_snmpmgr_sendsetrequest(void* lpObj);
int SendSetRequest();

Remarks

Sends a SetRequest packet. The object identifiers, types, and values for the request are taken from the Objects collection.

Example (Sending a SetRequest)

SNMPControl.RemoteHost = "MyAgent" SNMPControl.ObjCount = 1 SNMPControl.ObjId(0) = "1.3.6.1.2.1.1.1.0" SNMPControl.ObjValue(0) = "New Value" SNMPControl.ObjType(0) = otOctetString SNMPControl.SendSetRequest()

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Value Method (SNMPMgr Class)

Returns the value corresponding to an OID.

Syntax

ANSI (Cross Platform)
char* Value(const char* lpszOID);

Unicode (Windows)
LPWSTR Value(LPCWSTR lpszOID);
char* ipworkssnmp_snmpmgr_value(void* lpObj, const char* lpszOID);
QString Value(const QString& qsOID);

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.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Walk Method (SNMPMgr Class)

Does an SNMP walk starting with the specified oid.

Syntax

ANSI (Cross Platform)
int Walk(const char* lpszTableOid);

Unicode (Windows)
INT Walk(LPCWSTR lpszTableOid);
int ipworkssnmp_snmpmgr_walk(void* lpObj, const char* lpszTableOid);
int Walk(const QString& qsTableOid);

Remarks

A walk will traverse all OIDs in the TableOid that are lexographically greater than the value of the TableOid.

The results of the walk may be obtained through the Response events. During the event, the current returned object will exist inside of the Objects collection. If StoreWalkObjects is set to true, the Objects collection will contain all returned objects when the Walk completes.

Use the WalkLimit property to regulate how many objects the walk will traverse in the table.

NOTE: The collection of objects is cleared before the walk begins.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

BadPacket Event (SNMPMgr Class)

Fired for erroneous and/or malformed messages.

Syntax

ANSI (Cross Platform)
virtual int FireBadPacket(SNMPMgrBadPacketEventParams *e);
typedef struct {
const char *Packet; int lenPacket;
const char *SourceAddress;
int SourcePort;
int ErrorCode;
const char *ErrorDescription;
int Report; int reserved; } SNMPMgrBadPacketEventParams;
Unicode (Windows) virtual INT FireBadPacket(SNMPMgrBadPacketEventParams *e);
typedef struct {
LPCSTR Packet; INT lenPacket;
LPCWSTR SourceAddress;
INT SourcePort;
INT ErrorCode;
LPCWSTR ErrorDescription;
BOOL Report; INT reserved; } SNMPMgrBadPacketEventParams;
#define EID_SNMPMGR_BADPACKET 1

virtual INT IPWORKSSNMP_CALL FireBadPacket(LPSTR &lpPacket, INT &lenPacket, LPSTR &lpszSourceAddress, INT &iSourcePort, INT &iErrorCode, LPSTR &lpszErrorDescription, BOOL &bReport);
class SNMPMgrBadPacketEventParams {
public:
  const QByteArray &Packet();

  const QString &SourceAddress();

  int SourcePort();

  int ErrorCode();

  const QString &ErrorDescription();

  bool Report();
  void SetReport(bool bReport);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void BadPacket(SNMPMgrBadPacketEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireBadPacket(SNMPMgrBadPacketEventParams *e) {...}

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.

DiscoveryRequest Event (SNMPMgr Class)

Fired when an SNMPv3 discovery packet is received.

Syntax

ANSI (Cross Platform)
virtual int FireDiscoveryRequest(SNMPMgrDiscoveryRequestEventParams *e);
typedef struct {
const char *EngineId; int lenEngineId;
int EngineBoots;
int EngineTime;
const char *User;
int SecurityLevel;
const char *SourceAddress;
int SourcePort;
int Respond; int reserved; } SNMPMgrDiscoveryRequestEventParams;
Unicode (Windows) virtual INT FireDiscoveryRequest(SNMPMgrDiscoveryRequestEventParams *e);
typedef struct {
LPCSTR EngineId; INT lenEngineId;
INT EngineBoots;
INT EngineTime;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR SourceAddress;
INT SourcePort;
BOOL Respond; INT reserved; } SNMPMgrDiscoveryRequestEventParams;
#define EID_SNMPMGR_DISCOVERYREQUEST 2

virtual INT IPWORKSSNMP_CALL FireDiscoveryRequest(LPSTR &lpEngineId, INT &lenEngineId, INT &iEngineBoots, INT &iEngineTime, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszSourceAddress, INT &iSourcePort, BOOL &bRespond);
class SNMPMgrDiscoveryRequestEventParams {
public:
  const QByteArray &EngineId();

  int EngineBoots();

  int EngineTime();

  const QString &User();

  int SecurityLevel();

  const QString &SourceAddress();

  int SourcePort();

  bool Respond();
  void SetRespond(bool bRespond);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void DiscoveryRequest(SNMPMgrDiscoveryRequestEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireDiscoveryRequest(SNMPMgrDiscoveryRequestEventParams *e) {...}

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).

DiscoveryResponse Event (SNMPMgr Class)

Fired when an SNMPv3 discovery response is received.

Syntax

ANSI (Cross Platform)
virtual int FireDiscoveryResponse(SNMPMgrDiscoveryResponseEventParams *e);
typedef struct {
const char *EngineId; int lenEngineId;
int EngineBoots;
int EngineTime;
const char *User;
int SecurityLevel;
const char *SourceAddress;
int SourcePort; int reserved; } SNMPMgrDiscoveryResponseEventParams;
Unicode (Windows) virtual INT FireDiscoveryResponse(SNMPMgrDiscoveryResponseEventParams *e);
typedef struct {
LPCSTR EngineId; INT lenEngineId;
INT EngineBoots;
INT EngineTime;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR SourceAddress;
INT SourcePort; INT reserved; } SNMPMgrDiscoveryResponseEventParams;
#define EID_SNMPMGR_DISCOVERYRESPONSE 3

virtual INT IPWORKSSNMP_CALL FireDiscoveryResponse(LPSTR &lpEngineId, INT &lenEngineId, INT &iEngineBoots, INT &iEngineTime, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszSourceAddress, INT &iSourcePort);
class SNMPMgrDiscoveryResponseEventParams {
public:
  const QByteArray &EngineId();

  int EngineBoots();

  int EngineTime();

  const QString &User();

  int SecurityLevel();

  const QString &SourceAddress();

  int SourcePort();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void DiscoveryResponse(SNMPMgrDiscoveryResponseEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireDiscoveryResponse(SNMPMgrDiscoveryResponseEventParams *e) {...}

Remarks

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

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 request, SecurityLevel is at least 1.

Error Event (SNMPMgr Class)

Information about errors during data delivery.

Syntax

ANSI (Cross Platform)
virtual int FireError(SNMPMgrErrorEventParams *e);
typedef struct {
int ErrorCode;
const char *Description; int reserved; } SNMPMgrErrorEventParams;
Unicode (Windows) virtual INT FireError(SNMPMgrErrorEventParams *e);
typedef struct {
INT ErrorCode;
LPCWSTR Description; INT reserved; } SNMPMgrErrorEventParams;
#define EID_SNMPMGR_ERROR 4

virtual INT IPWORKSSNMP_CALL FireError(INT &iErrorCode, LPSTR &lpszDescription);
class SNMPMgrErrorEventParams {
public:
  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Error(SNMPMgrErrorEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireError(SNMPMgrErrorEventParams *e) {...}

Remarks

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

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

HashPassword Event (SNMPMgr Class)

Fired before and after a password is hashed.

Syntax

ANSI (Cross Platform)
virtual int FireHashPassword(SNMPMgrHashPasswordEventParams *e);
typedef struct {
const char *Password;
int AuthAlgorithm;
char *Hash; int reserved; } SNMPMgrHashPasswordEventParams;
Unicode (Windows) virtual INT FireHashPassword(SNMPMgrHashPasswordEventParams *e);
typedef struct {
LPCWSTR Password;
INT AuthAlgorithm;
LPWSTR Hash; INT reserved; } SNMPMgrHashPasswordEventParams;
#define EID_SNMPMGR_HASHPASSWORD 5

virtual INT IPWORKSSNMP_CALL FireHashPassword(LPSTR &lpszPassword, INT &iAuthAlgorithm, LPSTR &lpszHash);
class SNMPMgrHashPasswordEventParams {
public:
  const QString &Password();

  int AuthAlgorithm();

  const QString &Hash();
  void SetHash(const QString &qsHash);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void HashPassword(SNMPMgrHashPasswordEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireHashPassword(SNMPMgrHashPasswordEventParams *e) {...}

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 (SNMPMgr Class)

Fired when an InformRequest packet is received.

Syntax

ANSI (Cross Platform)
virtual int FireInformRequest(SNMPMgrInformRequestEventParams *e);
typedef struct {
int RequestId;
int SNMPVersion;
const char *Community;
const char *User;
int SecurityLevel;
const char *SourceAddress;
int SourcePort;
int ErrorIndex;
int ErrorStatus;
const char *ErrorDescription;
int Respond; int reserved; } SNMPMgrInformRequestEventParams;
Unicode (Windows) virtual INT FireInformRequest(SNMPMgrInformRequestEventParams *e);
typedef struct {
INT RequestId;
INT SNMPVersion;
LPCWSTR Community;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR SourceAddress;
INT SourcePort;
INT ErrorIndex;
INT ErrorStatus;
LPCWSTR ErrorDescription;
BOOL Respond; INT reserved; } SNMPMgrInformRequestEventParams;
#define EID_SNMPMGR_INFORMREQUEST 6

virtual INT IPWORKSSNMP_CALL FireInformRequest(INT &iRequestId, INT &iSNMPVersion, LPSTR &lpszCommunity, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszSourceAddress, INT &iSourcePort, INT &iErrorIndex, INT &iErrorStatus, LPSTR &lpszErrorDescription, BOOL &bRespond);
class SNMPMgrInformRequestEventParams {
public:
  int RequestId();

  int SNMPVersion();

  const QString &Community();

  const QString &User();

  int SecurityLevel();

  const QString &SourceAddress();

  int SourcePort();

  int ErrorIndex();
  void SetErrorIndex(int iErrorIndex);

  int ErrorStatus();
  void SetErrorStatus(int iErrorStatus);

  const QString &ErrorDescription();

  bool Respond();
  void SetRespond(bool bRespond);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void InformRequest(SNMPMgrInformRequestEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireInformRequest(SNMPMgrInformRequestEventParams *e) {...}

Remarks

The user in an InformRequest packet (SNMPv3) must match the user in the User property. 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 ObjId, ObjType, and ObjValue 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:

0 (noError) No error.
1 (tooBig) The response cannot fit in a single SNMP message.
2 (noSuchName) Variable does not exist.
3 (badValue) Invalid value or syntax.
4 (readOnly) Variable is read-only.
5 (genError) Other error (SNMPv1).
6 (noAccess) Access denied.
7 (wrongType) Wrong object type.
8 (wrongLength) Wrong length.
9 (wrongEncoding) Wrong encoding.
10 (wrongValue) Wrong value.
11 (noCreation) No creation.
12 (inconsistentValue) Inconsistent value.
13 (resourceUnavailable) Resource unavailable.
14 (commitFailed) Commit failed.
15 (undoFailed) Undo failed.
16 (authorizationError) Authorization error.
17 (notWritable) Variable is not writable.
18 (inconsistentName) Inconsistent name.
The ErrorIndex parameter indicates the index of the first variable (object) that caused an error. The default value is 0.

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

PacketTrace Event (SNMPMgr Class)

Fired for every packet sent or received.

Syntax

ANSI (Cross Platform)
virtual int FirePacketTrace(SNMPMgrPacketTraceEventParams *e);
typedef struct {
const char *Packet; int lenPacket;
int Direction;
const char *PacketAddress;
int PacketPort; int reserved; } SNMPMgrPacketTraceEventParams;
Unicode (Windows) virtual INT FirePacketTrace(SNMPMgrPacketTraceEventParams *e);
typedef struct {
LPCSTR Packet; INT lenPacket;
INT Direction;
LPCWSTR PacketAddress;
INT PacketPort; INT reserved; } SNMPMgrPacketTraceEventParams;
#define EID_SNMPMGR_PACKETTRACE 7

virtual INT IPWORKSSNMP_CALL FirePacketTrace(LPSTR &lpPacket, INT &lenPacket, INT &iDirection, LPSTR &lpszPacketAddress, INT &iPacketPort);
class SNMPMgrPacketTraceEventParams {
public:
  const QByteArray &Packet();

  int Direction();

  const QString &PacketAddress();

  int PacketPort();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void PacketTrace(SNMPMgrPacketTraceEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FirePacketTrace(SNMPMgrPacketTraceEventParams *e) {...}

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.

ReadyToSend Event (SNMPMgr Class)

Fired when the class is ready to send data.

Syntax

ANSI (Cross Platform)
virtual int FireReadyToSend(SNMPMgrReadyToSendEventParams *e);
typedef struct { int reserved; } SNMPMgrReadyToSendEventParams;
Unicode (Windows) virtual INT FireReadyToSend(SNMPMgrReadyToSendEventParams *e);
typedef struct { INT reserved; } SNMPMgrReadyToSendEventParams;
#define EID_SNMPMGR_READYTOSEND 8

virtual INT IPWORKSSNMP_CALL FireReadyToSend();
class SNMPMgrReadyToSendEventParams {
public:
  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void ReadyToSend(SNMPMgrReadyToSendEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireReadyToSend(SNMPMgrReadyToSendEventParams *e) {...}

Remarks

The ReadyToSend event indicates that the underlying TCP/IP subsystem is ready to accept data after a failed DataToSend.

Report Event (SNMPMgr Class)

Fired when a Report packet is received.

Syntax

ANSI (Cross Platform)
virtual int FireReport(SNMPMgrReportEventParams *e);
typedef struct {
int RequestId;
int SNMPVersion;
const char *Community;
const char *User;
int SecurityLevel;
const char *SourceAddress;
int SourcePort;
int ErrorIndex;
int ErrorStatus;
const char *ErrorDescription; int reserved; } SNMPMgrReportEventParams;
Unicode (Windows) virtual INT FireReport(SNMPMgrReportEventParams *e);
typedef struct {
INT RequestId;
INT SNMPVersion;
LPCWSTR Community;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR SourceAddress;
INT SourcePort;
INT ErrorIndex;
INT ErrorStatus;
LPCWSTR ErrorDescription; INT reserved; } SNMPMgrReportEventParams;
#define EID_SNMPMGR_REPORT 9

virtual INT IPWORKSSNMP_CALL FireReport(INT &iRequestId, INT &iSNMPVersion, LPSTR &lpszCommunity, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszSourceAddress, INT &iSourcePort, INT &iErrorIndex, INT &iErrorStatus, LPSTR &lpszErrorDescription);
class SNMPMgrReportEventParams {
public:
  int RequestId();

  int SNMPVersion();

  const QString &Community();

  const QString &User();

  int SecurityLevel();

  const QString &SourceAddress();

  int SourcePort();

  int ErrorIndex();

  int ErrorStatus();

  const QString &ErrorDescription();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Report(SNMPMgrReportEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireReport(SNMPMgrReportEventParams *e) {...}

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 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 ObjId, ObjType, and ObjValue 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.

Response Event (SNMPMgr Class)

Fired when a GetResponse packet is received.

Syntax

ANSI (Cross Platform)
virtual int FireResponse(SNMPMgrResponseEventParams *e);
typedef struct {
int RequestId;
int SNMPVersion;
const char *Community;
const char *User;
int SecurityLevel;
const char *SourceAddress;
int SourcePort;
int ErrorIndex;
int ErrorStatus;
const char *ErrorDescription; int reserved; } SNMPMgrResponseEventParams;
Unicode (Windows) virtual INT FireResponse(SNMPMgrResponseEventParams *e);
typedef struct {
INT RequestId;
INT SNMPVersion;
LPCWSTR Community;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR SourceAddress;
INT SourcePort;
INT ErrorIndex;
INT ErrorStatus;
LPCWSTR ErrorDescription; INT reserved; } SNMPMgrResponseEventParams;
#define EID_SNMPMGR_RESPONSE 10

virtual INT IPWORKSSNMP_CALL FireResponse(INT &iRequestId, INT &iSNMPVersion, LPSTR &lpszCommunity, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszSourceAddress, INT &iSourcePort, INT &iErrorIndex, INT &iErrorStatus, LPSTR &lpszErrorDescription);
class SNMPMgrResponseEventParams {
public:
  int RequestId();

  int SNMPVersion();

  const QString &Community();

  const QString &User();

  int SecurityLevel();

  const QString &SourceAddress();

  int SourcePort();

  int ErrorIndex();

  int ErrorStatus();

  const QString &ErrorDescription();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Response(SNMPMgrResponseEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireResponse(SNMPMgrResponseEventParams *e) {...}

Remarks

The ErrorStatus and ErrorIndex parameters contain information about possible errors. ErrorDescription is a textual description of ErrorStatus. This value is parsed directly from the SNMP response, which will be a one-based value, so a value of i here maps to index i-1 in the Objects collection.

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

0 (noError) No error.
1 (tooBig) The response cannot fit in a single SNMP message.
2 (noSuchName) Variable does not exist.
3 (badValue) Invalid value or syntax.
4 (readOnly) Variable is read-only.
5 (genError) Other error (SNMPv1).
6 (noAccess) Access denied.
7 (wrongType) Wrong object type.
8 (wrongLength) Wrong length.
9 (wrongEncoding) Wrong encoding.
10 (wrongValue) Wrong value.
11 (noCreation) No creation.
12 (inconsistentValue) Inconsistent value.
13 (resourceUnavailable) Resource unavailable.
14 (commitFailed) Commit failed.
15 (undoFailed) Undo failed.
16 (authorizationError) Authorization error.
17 (notWritable) Variable is not writable.
18 (inconsistentName) Inconsistent name.
The ErrorIndex parameter indicates the index of the first variable (object) that caused an error. The default value is 0.

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

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 ObjId, ObjType, and ObjValue 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.

Trap Event (SNMPMgr Class)

Fired when a SNMP trap packet is received.

Syntax

ANSI (Cross Platform)
virtual int FireTrap(SNMPMgrTrapEventParams *e);
typedef struct {
int RequestId;
int SNMPVersion;
const char *Community;
const char *User;
int SecurityLevel;
const char *TrapOID;
int64 TimeStamp;
const char *SourceAddress;
int SourcePort; int reserved; } SNMPMgrTrapEventParams;
Unicode (Windows) virtual INT FireTrap(SNMPMgrTrapEventParams *e);
typedef struct {
INT RequestId;
INT SNMPVersion;
LPCWSTR Community;
LPCWSTR User;
INT SecurityLevel;
LPCWSTR TrapOID;
LONG64 TimeStamp;
LPCWSTR SourceAddress;
INT SourcePort; INT reserved; } SNMPMgrTrapEventParams;
#define EID_SNMPMGR_TRAP 11

virtual INT IPWORKSSNMP_CALL FireTrap(INT &iRequestId, INT &iSNMPVersion, LPSTR &lpszCommunity, LPSTR &lpszUser, INT &iSecurityLevel, LPSTR &lpszTrapOID, LONG64 &lTimeStamp, LPSTR &lpszSourceAddress, INT &iSourcePort);
class SNMPMgrTrapEventParams {
public:
  int RequestId();

  int SNMPVersion();

  const QString &Community();

  const QString &User();

  int SecurityLevel();

  const QString &TrapOID();

  qint64 TimeStamp();

  const QString &SourceAddress();

  int SourcePort();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Trap(SNMPMgrTrapEventParams *e);
// Or, subclass SNMPMgr and override this emitter function. virtual int FireTrap(SNMPMgrTrapEventParams *e) {...}

Remarks

The SNMPTrapMgr class should normally be used to receive traps, since it was designed and contains functionality specifically for that purpose. The SNMPMgr component can only receive traps from the agent that it is has most recently discovered with the Discover method.

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 SNMPMgr class is limited to accepting authenticated traps only for the user specified in User and Password and from the engine specified in RemoteEngineId with time parameters in RemoteEngineBoots and RemoteEngineTime (usually this is the SNMP engine discovered through the last call to Discover). If authenticated traps come from a different engine, or for a different user, they are ignored, and a BadPacket event is fired instead.

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 ObjId, ObjType, and ObjValue 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.

Config Settings (SNMPMgr Class)

The class accepts one or more of the following configuration settings. Configuration 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.

SNMPManager Config Settings

AllowSingleStepDiscovery:   Whether to allow discovery to be completed in a single step.

When making a discovery request in SNMPv3 while this setting is set to False (default), the component will send a second discovery request even if the agent responds to the first request with the EngineBoots and EngineTime. If set to True, the component will skip the second request if all the necessary information is returned in the first response.

CheckMessageOrigin:   Whether to match the origin IP address when receiving responses.

This setting specifies whether the class matches the source IP address in the response to the destination IP address of the request. When True (default) the class makes sure that response are received from the same IP to which the request was sent. In most cases this does not need to be changed. If there is a specific reason that responses are expected to originate from a different IP from that which the request was sent, this may be set to False. When False the class will not check the origin of received responses.

CheckSNMPVersion:   Whether to check the version of incoming packets.

By default only packets matching SNMPVersion can be received. Set this to false to ignore the version of incoming packets. The default is true.

CompatibilityMode:   Whether to operate the component in a specific compatibility mode.

This setting will cause the component to operate in a manner different than normal so that it is compatible with third-party products and libraries. The following table lists the possible values for this setting:

0 (default)Component operates normally for greatest compatibility.
1Component uses SNMP4j-compatible encryption (AES192 and AES256).
2Component automatically detects whether to use SNMP4j-compatible encryption (AES192 and AES256). Note: This option is only applicable when receiving packets. If you are using SNMPMgr or sending secure traps, you will need to select either 0 or 1.
ContextEngineId:   Sets the context engine id of the SNMP entity.

If set, the context engine id included in the PDU will be set.

ContextName:   Sets the context name of the SNMP entity.

If set, the context name included in the PDU will be set.

DecryptLogPackets:   Whether to decrypt logged packets.

When set to true this setting will cause the class to decrypt packets logged in PacketTrace. This only applies when using SNMP Version 3. The default is false.

ForceLocalPort:   Forces the class to bind to a specific port.

The default value is True, which makes the class throw an error if LocalPort is busy. When ForceLocalPort is set to False and the port is busy, the class silently chooses another random port.

IgnoreDuplicateResponse:   Whether to ignore duplicate responses.

In some scenarios an agent may send a duplicate response (identified by it's RequestID). To prevent processing of a duplicate response set this to true. The default is false

IgnorePortMismatch:   Whether to check if the port matches when a response is received.

When a response is received, the class will validate that the port in the response is the same as the port in the request. To disable this, set this to True.

IncomingContextEngineId:   The engine Id of the received packet.

This setting holds the engine Id of the received packet. This may be queried at any time, including from within an event, and returns the engine Id of the received packet. This is not needed in most cases, but can be used to store the incoming engine Id to send an asynchronous response later. This value is read-only.

IncomingContextName:   The context name of the received packet.

This setting holds the context name of the received packet. This may be queried at any time, including from within an event, and returns the context name of the received packet. This is not needed in most cases, but can be used to store the incoming context name to send an asynchronous response later. This value is read-only.

MsgMaxSize:   The maximum supported message size.

This setting specifies the maximum supported message size in bytes. This is only applicable when SNMPVersion is set to 3. This corresponds to the "msgMaxSize" field in the request.

SourceAddress:   The source address of the received packet.

This setting holds the source address of the received packet. This may be queried at any time, including from within an event, and returns the source address of the received packet. This value is read-only.

SourcePort:   The source port of the received packet.

This setting holds the source port of the received packet. This may be queried at any time, including from within an event, and returns the source port of the received packet. This value is read-only.

TimeoutInMilliseconds:   The timeout is treated as milliseconds.

Setting TimeoutInMilliseconds to true causes the class to use the value in Timeout as milliseconds instead of seconds, which is the default.

WalkInsideRange:   Stops the SNMP walk if the OID value returned from an agent is outside the table.

When WalkInsideRange is set to true the Walk will continue only while the OID Values returned from the agent are greater than the current OID Value. If an object is returned with an OID value that is out of this range it is not added to the Objects collection, the Error event will fire, and Walk will return. The default value is true.

WalkStartOID:   Specifies the OID to be used when a Walk is performed.

When this property is set and Walk is called, the first request sent will contain the specified WalkStartOID value. This feature is particularly useful in the case of errors, such as timeouts, that may occur during a Walk. In such a case, you can set WalkStartOID to the last OID returned before the Timeout occurred then call Walk again (using the original tableOID parameter value). This will allow you to continue the Walk where it left off (when the Timeout error occurred).

Note that when StoreWalkObjects is set to true and WalkStartOID is set, the existing entries in Objects will be maintained when Walk is called and new returned objects will be added (just as if no error occurred in the initial Walk call).

UDP Config Settings

CaptureIPPacketInfo:   Used to capture the packet information.

If this is set to true, the component will capture the IP packet information.

The default value for this setting is False.

Note: This setting is only available in Windows.

DelayHostResolution:   Whether the hostname is resolved when RemoteHost is set.

This setting specifies whether a hostname is resolved immediately when RemoteHost is set. If true the class will resolve the hostname and the IP address will be present in the RemoteHost property. If false, the hostname is not resolved until needed by the component when a method to connect or send data is called. If desired, ResolveRemoteHost may called to manually resolve the value in RemoteHost at any time.

The default value is false.

DestinationAddress:   Used to get the destination address from the packet information.

If CaptureIPPacketInfo is set to true, then this will be populated with the packet's destination address when a packet is received. This information will be accessible in the DataIn event.

Note: This setting is only available in Windows.

DontFragment:   Used to set the Don't Fragment flag of outgoing packets.

When set to True, packets sent by the class will have the Don't Fragment flag set. The default value is False.

LocalHost:   The name of the local host through which connections are initiated or accepted.

The LocalHost setting 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 setting 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).

LocalPort:   The port in the local host where the class binds.

This must be set before a connection is attempted. It instructs the class to bind to a specific port (or communication endpoint) in the local machine.

Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.

This; setting is useful when trying to connect to services that require a trusted port in the client side. An example is the remote shell (rsh) service in UNIX systems.

MaxPacketSize:   The maximum length of the packets that can be received.

This setting specifies the maximum size of the datagrams that the class will accept without truncation.

QOSDSCPValue:   Used to specify an arbitrary QOS/DSCP setting (optional).

UseConnection must be True to use this setting. This option allows you to specify an arbitrary DSCP value between 0 and 63. The default is 0. When set to the default value the component will not set a DSCP value.

Note: This setting uses the qWAVE API is only available on Windows 7, Windows Server 2008 R2, and later.

QOSTrafficType:   Used to specify QOS/DSCP settings (optional).

UseConnection must be True to use this setting. You may specify either the text or integer values: BestEffort (0), Background (1), ExcellentEffort (2), AudioVideo (3), Voice (4), and Control (5).

Note: This setting uses the qWAVE API which is only available on Windows Vista and Windows Server 2008 or above.

Note: QOSTrafficType must be set before setting Active to true.

ShareLocalPort:   If set to True, allows more than one instance of the class to be active on the same local port.

This option must be set before the class is activated through the Active property or it will have no effect.

The default value for this setting is False.

SourceIPAddress:   Used to set the source IP address used when sending a packet.

This configuration setting can be used to override the source IP address when sending a packet.

Note: This setting is only available in Windows and requires that the winpcap library be installed (or npcap with winpcap compatibility).

SourceMacAddress:   Used to set the source MAC address used when sending a packet.

This configuration setting can be used to override the source MAC address when sending a packet.

Note: This setting is only available in Windows and requires that the winpcap library be installed (or npcap with winpcap compatibility).

UseConnection:   Determines whether to use a connected socket.

UseConnection specifies whether the class should use a connected socket or not. The connection is defined as an association in between the local address/port and the remote address/port. As such, this is not a connection in the traditional TCP sense. What it means is only that the class will send and receive data only to and from the specified destination.

The default value for this setting is False.

UseIPv6:   Whether or not to use IPv6.

By default, the component expects an IPv4 address for local and remote host properties, and will create an IPv4 socket. To use IPv6 instead, set this to True.

Socket Config Settings

AbsoluteTimeout:   Determines whether timeouts are inactivity timeouts or absolute timeouts.

If AbsoluteTimeout is set to True, any method which does not complete within Timeout seconds will be aborted. By default, AbsoluteTimeout is False, and the timeout is an inactivity timeout.

Note: This option is not valid for UDP ports.

FirewallData:   Used to send extra data to the firewall.

When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g. headers for custom authentication schemes).

InBufferSize:   The size in bytes of the incoming queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. Increasing the value of the InBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

OutBufferSize:   The size in bytes of the outgoing queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. Increasing the value of the OutBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

Base Config Settings

BuildInfo:   Information about the product's build.

When queried, this setting will return a string containing information about the product's build.

CodePage:   The system code page used for Unicode to Multibyte translations.

The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:

IdentifierName
037IBM EBCDIC - U.S./Canada
437OEM - United States
500IBM EBCDIC - International
708Arabic - ASMO 708
709Arabic - ASMO 449+, BCON V4
710Arabic - Transparent Arabic
720Arabic - Transparent ASMO
737OEM - Greek (formerly 437G)
775OEM - Baltic
850OEM - Multilingual Latin I
852OEM - Latin II
855OEM - Cyrillic (primarily Russian)
857OEM - Turkish
858OEM - Multilingual Latin I + Euro symbol
860OEM - Portuguese
861OEM - Icelandic
862OEM - Hebrew
863OEM - Canadian-French
864OEM - Arabic
865OEM - Nordic
866OEM - Russian
869OEM - Modern Greek
870IBM EBCDIC - Multilingual/ROECE (Latin-2)
874ANSI/OEM - Thai (same as 28605, ISO 8859-15)
875IBM EBCDIC - Modern Greek
932ANSI/OEM - Japanese, Shift-JIS
936ANSI/OEM - Simplified Chinese (PRC, Singapore)
949ANSI/OEM - Korean (Unified Hangul Code)
950ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC)
1026IBM EBCDIC - Turkish (Latin-5)
1047IBM EBCDIC - Latin 1/Open System
1140IBM EBCDIC - U.S./Canada (037 + Euro symbol)
1141IBM EBCDIC - Germany (20273 + Euro symbol)
1142IBM EBCDIC - Denmark/Norway (20277 + Euro symbol)
1143IBM EBCDIC - Finland/Sweden (20278 + Euro symbol)
1144IBM EBCDIC - Italy (20280 + Euro symbol)
1145IBM EBCDIC - Latin America/Spain (20284 + Euro symbol)
1146IBM EBCDIC - United Kingdom (20285 + Euro symbol)
1147IBM EBCDIC - France (20297 + Euro symbol)
1148IBM EBCDIC - International (500 + Euro symbol)
1149IBM EBCDIC - Icelandic (20871 + Euro symbol)
1200Unicode UCS-2 Little-Endian (BMP of ISO 10646)
1201Unicode UCS-2 Big-Endian
1250ANSI - Central European
1251ANSI - Cyrillic
1252ANSI - Latin I
1253ANSI - Greek
1254ANSI - Turkish
1255ANSI - Hebrew
1256ANSI - Arabic
1257ANSI - Baltic
1258ANSI/OEM - Vietnamese
1361Korean (Johab)
10000MAC - Roman
10001MAC - Japanese
10002MAC - Traditional Chinese (Big5)
10003MAC - Korean
10004MAC - Arabic
10005MAC - Hebrew
10006MAC - Greek I
10007MAC - Cyrillic
10008MAC - Simplified Chinese (GB 2312)
10010MAC - Romania
10017MAC - Ukraine
10021MAC - Thai
10029MAC - Latin II
10079MAC - Icelandic
10081MAC - Turkish
10082MAC - Croatia
12000Unicode UCS-4 Little-Endian
12001Unicode UCS-4 Big-Endian
20000CNS - Taiwan
20001TCA - Taiwan
20002Eten - Taiwan
20003IBM5550 - Taiwan
20004TeleText - Taiwan
20005Wang - Taiwan
20105IA5 IRV International Alphabet No. 5 (7-bit)
20106IA5 German (7-bit)
20107IA5 Swedish (7-bit)
20108IA5 Norwegian (7-bit)
20127US-ASCII (7-bit)
20261T.61
20269ISO 6937 Non-Spacing Accent
20273IBM EBCDIC - Germany
20277IBM EBCDIC - Denmark/Norway
20278IBM EBCDIC - Finland/Sweden
20280IBM EBCDIC - Italy
20284IBM EBCDIC - Latin America/Spain
20285IBM EBCDIC - United Kingdom
20290IBM EBCDIC - Japanese Katakana Extended
20297IBM EBCDIC - France
20420IBM EBCDIC - Arabic
20423IBM EBCDIC - Greek
20424IBM EBCDIC - Hebrew
20833IBM EBCDIC - Korean Extended
20838IBM EBCDIC - Thai
20866Russian - KOI8-R
20871IBM EBCDIC - Icelandic
20880IBM EBCDIC - Cyrillic (Russian)
20905IBM EBCDIC - Turkish
20924IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol)
20932JIS X 0208-1990 & 0121-1990
20936Simplified Chinese (GB2312)
21025IBM EBCDIC - Cyrillic (Serbian, Bulgarian)
21027Extended Alpha Lowercase
21866Ukrainian (KOI8-U)
28591ISO 8859-1 Latin I
28592ISO 8859-2 Central Europe
28593ISO 8859-3 Latin 3
28594ISO 8859-4 Baltic
28595ISO 8859-5 Cyrillic
28596ISO 8859-6 Arabic
28597ISO 8859-7 Greek
28598ISO 8859-8 Hebrew
28599ISO 8859-9 Latin 5
28605ISO 8859-15 Latin 9
29001Europa 3
38598ISO 8859-8 Hebrew
50220ISO 2022 Japanese with no halfwidth Katakana
50221ISO 2022 Japanese with halfwidth Katakana
50222ISO 2022 Japanese JIS X 0201-1989
50225ISO 2022 Korean
50227ISO 2022 Simplified Chinese
50229ISO 2022 Traditional Chinese
50930Japanese (Katakana) Extended
50931US/Canada and Japanese
50933Korean Extended and Korean
50935Simplified Chinese Extended and Simplified Chinese
50936Simplified Chinese
50937US/Canada and Traditional Chinese
50939Japanese (Latin) Extended and Japanese
51932EUC - Japanese
51936EUC - Simplified Chinese
51949EUC - Korean
51950EUC - Traditional Chinese
52936HZ-GB2312 Simplified Chinese
54936Windows XP: GB18030 Simplified Chinese (4 Byte)
57002ISCII Devanagari
57003ISCII Bengali
57004ISCII Tamil
57005ISCII Telugu
57006ISCII Assamese
57007ISCII Oriya
57008ISCII Kannada
57009ISCII Malayalam
57010ISCII Gujarati
57011ISCII Punjabi
65000Unicode UTF-7
65001Unicode UTF-8
The following is a list of valid code page identifiers for Mac OS only:
IdentifierName
1ASCII
2NEXTSTEP
3JapaneseEUC
4UTF8
5ISOLatin1
6Symbol
7NonLossyASCII
8ShiftJIS
9ISOLatin2
10Unicode
11WindowsCP1251
12WindowsCP1252
13WindowsCP1253
14WindowsCP1254
15WindowsCP1250
21ISO2022JP
30MacOSRoman
10UTF16String
0x90000100UTF16BigEndian
0x94000100UTF16LittleEndian
0x8c000100UTF32String
0x98000100UTF32BigEndian
0x9c000100UTF32LittleEndian
65536Proprietary

LicenseInfo:   Information about the current license.

When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information:

  • Product: The product the license is for.
  • Product Key: The key the license was generated from.
  • License Source: Where the license was found (e.g., RuntimeLicense, License File).
  • License Type: The type of license installed (e.g., Royalty Free, Single Server).
  • Last Valid Build: The last valid build number for which the license will work.
MaskSensitive:   Whether sensitive data is masked in log messages.

In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to true to mask sensitive data. The default is true.

This setting only works on these classes: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.

ProcessIdleEvents:   Whether the class uses its internal event loop to process events when the main thread is idle.

If set to False, the class will not fire internal idle events. Set this to False to use the class in a background thread on Mac OS. By default, this setting is True.

SelectWaitMillis:   The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.

If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20.

UseInternalSecurityAPI:   Tells the class whether or not to use the system security libraries or an internal implementation.

When set to false, the class will use the system security libraries by default to perform cryptographic functions where applicable.

Setting this setting to true tells the class to use the internal implementation instead of using the system security libraries.

On Windows, this setting is set to false by default. On Linux/macOS, this setting is set to true by default.

To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the OpenSSL Notes section.

Trappable Errors (SNMPMgr Class)

Error Handling (C++)

Call the GetLastErrorCode() method to obtain the last called method's result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. Known error codes are listed below. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

SNMPMgr Errors

201   Timeout.
301   Bad Object Index when accessing the Obj* properties. Timeout when performing an operation. Check the error description for details.
302   Value exceeds maximum number of objects allowed.
303   The value must be an IP address in dotted format.
305   Unsupported SNMP version.
306   Unknown PDU type.
307   The class is busy performing the current action.
308   Verification failed.
309   Missing password for Verification.
310   Missing signature.
311   Missing remote time.
312   Missing timeout value.
313   Decryption Failed.
314   Missing password for decryption.
315   Not encrypted.
316   Security model not supported.
317   Defective packet
318   Not from bound point.
319   Operation not permitted in current role.
320   Bad packet.
321   Message not authenticated.
322   No such oid.
323   Missing privacy parameter.
324   Bad engine id.
325   Bad time frame.
326   Bad user name.
327   Security level was not accepted.
328   Discovery failed.
329   Incorrect key length.
330   No authentication password supplied.
333   Returned OID was out of range. This is applicable only when WalkInsideRange is set to true.

The class may also return one of the following error codes, which are inherited from other classes.

UDP Errors

104   UDP is already Active.
106   You cannot change the LocalPort while the class is Active.
107   You cannot change the LocalHost at this time. A connection is in progress.
109   The class must be Active for this operation.
112   Cannot change MaxPacketSize while the class is Active.
113   Cannot change ShareLocalPort option while the class is Active.
114   Cannot change RemoteHost when UseConnection is set and the class Active.
115   Cannot change RemotePort when UseConnection is set and the class is Active.
116   RemotePort can't be zero when UseConnection is set. Please specify a valid service port number.
117   Cannot change UseConnection while the class is Active.
118   Message can't be longer than MaxPacketSize.
119   Message too short.
434   Unable to convert string to selected CodePage

SSL Errors

270   Cannot load specified security library.
271   Cannot open certificate store.
272   Cannot find specified certificate.
273   Cannot acquire security credentials.
274   Cannot find certificate chain.
275   Cannot verify certificate chain.
276   Error during handshake.
280   Error verifying certificate.
281   Could not find client certificate.
282   Could not find server certificate.
283   Error encrypting data.
284   Error decrypting data.

TCP/IP Errors

10004   [10004] Interrupted system call.
10009   [10009] Bad file number.
10013   [10013] Access denied.
10014   [10014] Bad address.
10022   [10022] Invalid argument.
10024   [10024] Too many open files.
10035   [10035] Operation would block.
10036   [10036] Operation now in progress.
10037   [10037] Operation already in progress.
10038   [10038] Socket operation on non-socket.
10039   [10039] Destination address required.
10040   [10040] Message too long.
10041   [10041] Protocol wrong type for socket.
10042   [10042] Bad protocol option.
10043   [10043] Protocol not supported.
10044   [10044] Socket type not supported.
10045   [10045] Operation not supported on socket.
10046   [10046] Protocol family not supported.
10047   [10047] Address family not supported by protocol family.
10048   [10048] Address already in use.
10049   [10049] Can't assign requested address.
10050   [10050] Network is down.
10051   [10051] Network is unreachable.
10052   [10052] Net dropped connection or reset.
10053   [10053] Software caused connection abort.
10054   [10054] Connection reset by peer.
10055   [10055] No buffer space available.
10056   [10056] Socket is already connected.
10057   [10057] Socket is not connected.
10058   [10058] Can't send after socket shutdown.
10059   [10059] Too many references, can't splice.
10060   [10060] Connection timed out.
10061   [10061] Connection refused.
10062   [10062] Too many levels of symbolic links.
10063   [10063] File name too long.
10064   [10064] Host is down.
10065   [10065] No route to host.
10066   [10066] Directory not empty
10067   [10067] Too many processes.
10068   [10068] Too many users.
10069   [10069] Disc Quota Exceeded.
10070   [10070] Stale NFS file handle.
10071   [10071] Too many levels of remote in path.
10091   [10091] Network subsystem is unavailable.
10092   [10092] WINSOCK DLL Version out of range.
10093   [10093] Winsock not loaded yet.
11001   [11001] Host not found.
11002   [11002] Non-authoritative 'Host not found' (try again or check DNS setup).
11003   [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP.
11004   [11004] Valid name, no data record (check DNS setup).