The SnmpMgrRequest function requests the specified operation be performed with the specified agent.
SNMPAPI SnmpMgrRequest(
| LPSNMP_MGR_SESSION session, | // SNMP session pointer |
| BYTE requestType, | // Get, GetNext, or Set |
| RFC1157VarBindList *variableBindings, | // variable bindings |
| AsnInteger *errorStatus, | // result error status |
| AsnInteger *errorIndex | // result error index |
| ); |
Parameters
session
[in] Points to an internal structure that specifies the session that will perform the request.
requestType
[in] Specifies the SNMP request type. This parameter can be one of the following values:
| Value | Meaning |
| ASN_RFC1157_GETREQUEST | Search and receive a value from a specified variable. |
| ASN_RFC1157_GETNEXTREQUEST | Search and receive a value from a variable without knowing the name of the variable. |
| ASN_RFC1157_SETREQUEST | Store a value within a specific variable. |
variableBindings
[in/out] Points to the variable bindings list.
errorStatus
[out] Points to a variable in which the error status result will be returned. This parameter can be one of the following values:
| Value | Meaning |
| SNMP_ERRORSTATUS_NOERROR | The agent reports that no errors occurred during transmission. |
| SNMP_ERRORSTATUS_TOOBIG | The agent could not place the results of the requested operation into a single SNMP message. |
| SNMP_ERRORSTATUS_NOSUCHNAME | The requested operation identified an unknown variable. |
| SNMP_ERRORSTATUS_BADVALUE | The requested operation tried to change a variable but it specified either a syntax or value error. |
| SNMP_ERRORSTATUS_READONLY | The requested operation tried to change a variable that was not allowed to change according to the community profile of the variable. |
| SNMP_ERRORSTATUS_GENERR | An error other than one of those listed here occurred during the requested operation. |
errorIndex
[out] Points to a variable in which the error index result will be returned.
Return Values
If the function succeeds, the return value is TRUE.
If the function fails, the return value is NULL. To get extended error information, call GetLastError. GetLastError may return one of the following error codes:
| Error Code | Meaning |
| SNMP_MGMTAPI_TIMEOUT | The request timed-out |
| SNMP_MGMTAPI_SELECT_FDERRORS | Unexpected error file descriptors indicated by the Windows Sockets select function |
Remarks
Retries and time-outs are supplied to the SnmpMgrOpen function. Each variable in the variable bindings list must be initialized to type ASN_NULL for Get and Get Next requests.
For more information, see RFC 1157.
See Also