|
Overview |
|
|
|
Group |
|
|
|
Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| mgmtapi.lib
| Header File
| mgmtapi.h
| Unicode
| No
| Platform Notes
| None
|
|
|
SnmpMgrGetTrap
The SnmpMgrGetTrap function returns outstanding trap data that the caller has not received if
trap reception is enabled.
BOOL SnmpMgrGetTrap(
AsnObjectIdentifier *enterprise,
| // generating enterprise
| AsnNetworkAddress *IPAddress,
| // generating IP address
| AsnInteger *genericTrap,
| // generic trap type
| AsnInteger *specificTrap,
| // enterprise-specific type
| AsnTimeticks *timeStamp,
| // time stamp
| RFC1157VarBindList *variableBindings
| // variable bindings
| );
|
|
Parameters
enterprise
[out] Points to an object identifier that specifies the enterprise that
generated the SNMP trap.
IPAddress
[out] Points to the IP address of the enterprise that generated the SNMP trap.
genericTrap
[out] Points to an indicator of the generic trap. This parameter can be one of
the following values:
Value
| Meaning
| SNMP_GENERICTRAP_COLDSTART
| The agent is initializing protocol entities on the managed mode. It may alter
objects in its view.
| SNMP_GENERICTRAP_WARMSTART
| The agent is re-initializing itself but it will not alter objects in its view.
| SNMP_GENERICTRAP_LINKDOWN
| An attached interface has changed from the up state to the down state. The first variable in the variable bindings list identifies the
interface.
| SNMP_GENERICTRAP_LINKUP
| An attached interface has changed from the down state to the up state. The first variable in the variable bindings list identifies the
interface.
| SNMP_GENERICTRAP_AUTHFAILURE
| An SNMP entity has sent an SNMP message, but it has falsely claimed to belong
to a known community.
| SNMP_GENERICTRAP_EGPNEIGHLOSS
| An EGP peer has changed to the down state. The first variable in the variable bindings list identifies the IP
address of the EGP peer.
| SNMP_GENERICTRAP_ENTERSPECIFIC
| An extraordinary event has occurred and it is identified in the specificTrap parameter with an enterprise-specific value.
|
specificTrap
[out] Points to an indication of the specific trap generated.
timeStamp
[out] Points to a variable to receive the time stamp.
[out] Points to the variable bindings list.
Return Values
If the function returns a trap, the return value is TRUE.
You should call the SnmpMgrGetTrap function repeatedly until GetLastError returns a value of FALSE. GetLastError may also return the following error codes:
Error Code
| Meaning
| SNMP_MGMTAPI_TRAP_ERRORS
| Indicates errors were encountered; traps are not accessible.
| SNMP_MGMTAPI_NOTRAPS
| Indicates no traps are available.
| SNMP_MEM_ALLOC_ERROR
| Indicates a memory allocation error.
|
Remarks
You must allocate memory for the list member of the RFC1157VarBindList structure with the SnmpUtilMemAlloc function but you do not need to free it.
Once an operating system completes a task, it sends a trap signal. An internal
SNMP signal checks for the trap signal to notify the SNMP manager of the
completed task. The event that the phTrapAvailable parameter of the SnmpMgrTrapListen function points to allows event-driven acquisition of SNMP traps. You can
ignore the trap and poll the SnmpMgrGetTrap function for traps at regular intervals instead.
Another method to acquire traps is to create a thread to wait on the event
using the WaitForSingleObject function. When the event occurs, the thread should clear the event using the ResetEvent function. Then the thread should repeatedly call SnmpMgrGetTrap until it returns a value of FALSE.
Always call the SnmpMgrTrapListen function before calling SnmpMgrGetTrap to receive traps. If an SNMP manager application calls SnmpMgrGetTrap first to receive traps, it returns a value of FALSE, even if there are traps
available. If the application calls GetLastError before calling SnmpMgrTrapListen, GetLastError returns the error code SNMP_MGMTAPI_TRAP_ERRORS.
See Also
SnmpMgrTrapListen, SnmpUtilMemAlloc, WaitForSingleObject, RFC1157VarBindList, ResetEvent
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
