GetOwnerModuleFromUdpEntry (Compact 7)
3/12/2014
This function retrieves data about the module that issued the context bind for a specific IPv4 UDP endpoint in a MIB table row.
Syntax
DWORD GetOwnerModuleFromUdpEntry(
__in PMIB_UDPROW_OWNER_MODULE pUdpEntry,
__in TCPIP_OWNER_MODULE_INFO_CLASS Class,
__out PVOID Buffer,
__inout PDWORD pdwSize
);
Parameters
- pUdpEntry
A pointer to a MIB_UDPROW_OWNER_MODULE structure that contains the IPv4 UDP endpoint entry used to obtain the owner module.
- Class
A TCPIP_OWNER_MODULE_INFO_CLASS enumeration value that indicates the type of data to obtain regarding the owner module.
Buffer
The buffer that contains a TCPIP_OWNER_MODULE_BASIC_INFO structure with the owner module data. The type of data returned in this buffer is indicated by the value of the Class parameter.The following structures are used for the data in Buffer when Class is set to the corresponding value.
Classenumeration value Bufferdata format TCPIP_OWNER_MODULE_BASIC_INFO
TCPIP_OWNER_MODULE_BASIC_INFO
- pdwSize
The estimated size, in bytes, of the structure returned in Buffer. If this value is set too small, ERROR_INSUFFICIENT_BUFFER is returned by this function, and this field will contain the correct structure size.
Return Value
If the call is successful, the value NO_ERROR is returned. Otherwise, the following error is returned.
| Return code | Description |
|---|---|
ERROR_INSUFFICIENT_BUFFER |
Insufficient space was allocated for the table. The size of the table is returned in the pdwSize parameter, and must be used in a subsequent call to this function in order to successfully retrieve the table. |
Remarks
Buffer contains not only a structure with pointers to specific data, for example, pointers to the zero-terminated strings that contain the name and path of the owner module, but also the actual data itself; that is the name and path strings. Therefore, when calculating the buffer size, make sure that you have sufficient space for both the structure and the data the members of the structure point to.
The resolution of TCP table entries to owner modules is a best practice. In several cases, the owner module name returned in the TCPIP_OWNER_MODULE_BASIC_INFO structure can be a process name, such as "svchost.exe", a service name, such as "RPC", or a component name, such as "timer.dll".