"Juan Ignacio Gelos" <msnews@juanignaciogelos.com> wrote in message
news:Ob5P9pu1EHA.1452@TK2MSFTNGP11.phx.gbl...
> Hi,
>
> Trying to enumerate interfaces on RRAS.
> Bellow is what I have so far. The MprAdminInterfaceEnum has an
> lplpbBuffer out parameter which is a buffer that will contain an array of
> MPR_INTERFACE_0's.
> I want to access the wszInterfaceName for each interface. How should I
> marshal this parameter?
>
> Thanks,
> Juan
>
> /// <summary>
> /// The MprAdminInterfaceEnum function enumerates all the interfaces on
a
> specified server.
> /// </summary>
> /// <param name="hMprServer">[in] Handle to the router on which to
execute
> this call. Obtain this handle by calling MprAdminServerConnect.</param>
> /// <param name="dwLevel">[in] Specifies the level of information passed
> in lpBuffer. Must be zero.</param>
> /// <param name="lplpbBuffer">[out] Pointer to a pointer variable that
> points to an array of MPR_INTERFACE_0 structures on successful return.
This
> memory must be freed by a call to the MprAdminBufferFree function.</param>
> /// <param name="dwPrefMaxLen">[in] Specifies the preferred maximum
length
> of returned data (in 8-bit bytes). If this parameter is -1, the buffer
> returned is large enough to hold all available information. </param>
> /// <param name="lpdwEntriesRead">[out] Pointer to a DWORD variable.
This
> variable receives the total number of interfaces that were enumerated from
> the current position in the enumeration.</param>
> /// <param name="lpdwTotalEntries">[out] Pointer to a DWORD variable.
This
> variable receives the total number of interfaces that could have been
> enumerated from the current resume position.</param>
> /// <param name="lpdwResumeHandle">[in] Pointer to a DWORD variable.
This
> variable specifies a resume handle that can be used to continue the
> enumeration. The handle should be zero on the first call, and left
unchanged
> on subsequent calls. If the return code is ERROR_MORE_DATA then the call
can
> be re-issued using the handle to retrieve more data. If on return, the
> handle is NULL, the enumeration cannot be continued. For other types of
> error returns, this handle is invalid.
> /// This parameter is optional. If the calling application specifies
NULL
> for this parameter, the function does not return a resume handle.</param>
> /// <returns></returns>
> /// <remarks><code>
> /// DWORD APIENTRY
> /// MprAdminInterfaceEnum(
> /// IN MPR_SERVER_HANDLE hMprServer,
> /// IN DWORD dwLevel,
> /// OUT LPBYTE * lplpbBuffer,
> /// IN DWORD dwPrefMaxLen,
> /// OUT LPDWORD lpdwEntriesRead,
> /// OUT LPDWORD lpdwTotalEntries,
> /// IN LPDWORD lpdwResumeHandle OPTIONAL
> /// );
> /// </code></remarks>
> [DllImport("Mprapi.dll", CharSet = CharSet.Ansi)]
> public static extern int MprAdminInterfaceEnum(
> IntPtr hMprServer,
> [MarshalAs(UnmanagedType.U4)]
> int dwLevel,
>
> ref MPR_INTERFACE_0[] lplpbBuffer,
> int dwPrefMaxLen,
> ref int lpdwEntriesRead,
> ref int lpdwTotalEntries,
> ref int lpdwResumeHandle
> );
>
>
>
> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
> public struct MPR_INTERFACE_0
> {
> [MarshalAs(UnmanagedType.ByValTStr, SizeConst =
> MprApi.MAX_INTERFACE_NAME_LEN+1)]
> public string wszInterfaceName;
> public IntPtr hInterface;
> public bool fEnabled;
> public ROUTER_INTERFACE_TYPE dwIfType;
> public ROUTER_CONNECTION_STATE dwConnectionState;
> public UnreachabilityReasons fUnReachabilityReasons;
> public int dwLastError;
> }
>
>

"Juan Ignacio Gelos" <msnews@juanignaciogelos.com> wrote in message
news:Ob5P9pu1EHA.1452@TK2MSFTNGP11.phx.gbl...
> Hi,
>
> Trying to enumerate interfaces on RRAS.
> Bellow is what I have so far. The MprAdminInterfaceEnum has an
> lplpbBuffer out parameter which is a buffer that will contain an array of
> MPR_INTERFACE_0's.
> I want to access the wszInterfaceName for each interface. How should I
> marshal this parameter?
>
> Thanks,
> Juan
>
> /// <summary>
> /// The MprAdminInterfaceEnum function enumerates all the interfaces on
a
> specified server.
> /// </summary>
> /// <param name="hMprServer">[in] Handle to the router on which to
execute
> this call. Obtain this handle by calling MprAdminServerConnect.</param>
> /// <param name="dwLevel">[in] Specifies the level of information passed
> in lpBuffer. Must be zero.</param>
> /// <param name="lplpbBuffer">[out] Pointer to a pointer variable that
> points to an array of MPR_INTERFACE_0 structures on successful return.
This
> memory must be freed by a call to the MprAdminBufferFree function.</param>
> /// <param name="dwPrefMaxLen">[in] Specifies the preferred maximum
length
> of returned data (in 8-bit bytes). If this parameter is -1, the buffer
> returned is large enough to hold all available information. </param>
> /// <param name="lpdwEntriesRead">[out] Pointer to a DWORD variable.
This
> variable receives the total number of interfaces that were enumerated from
> the current position in the enumeration.</param>
> /// <param name="lpdwTotalEntries">[out] Pointer to a DWORD variable.
This
> variable receives the total number of interfaces that could have been
> enumerated from the current resume position.</param>
> /// <param name="lpdwResumeHandle">[in] Pointer to a DWORD variable.
This
> variable specifies a resume handle that can be used to continue the
> enumeration. The handle should be zero on the first call, and left
unchanged
> on subsequent calls. If the return code is ERROR_MORE_DATA then the call
can
> be re-issued using the handle to retrieve more data. If on return, the
> handle is NULL, the enumeration cannot be continued. For other types of
> error returns, this handle is invalid.
> /// This parameter is optional. If the calling application specifies
NULL
> for this parameter, the function does not return a resume handle.</param>
> /// <returns></returns>
> /// <remarks><code>
> /// DWORD APIENTRY
> /// MprAdminInterfaceEnum(
> /// IN MPR_SERVER_HANDLE hMprServer,
> /// IN DWORD dwLevel,
> /// OUT LPBYTE * lplpbBuffer,
> /// IN DWORD dwPrefMaxLen,
> /// OUT LPDWORD lpdwEntriesRead,
> /// OUT LPDWORD lpdwTotalEntries,
> /// IN LPDWORD lpdwResumeHandle OPTIONAL
> /// );
> /// </code></remarks>
> [DllImport("Mprapi.dll", CharSet = CharSet.Ansi)]
> public static extern int MprAdminInterfaceEnum(
> IntPtr hMprServer,
> [MarshalAs(UnmanagedType.U4)]
> int dwLevel,
>
> ref MPR_INTERFACE_0[] lplpbBuffer,
> int dwPrefMaxLen,
> ref int lpdwEntriesRead,
> ref int lpdwTotalEntries,
> ref int lpdwResumeHandle
> );
>
>
>
> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
> public struct MPR_INTERFACE_0
> {
> [MarshalAs(UnmanagedType.ByValTStr, SizeConst =
> MprApi.MAX_INTERFACE_NAME_LEN+1)]
> public string wszInterfaceName;
> public IntPtr hInterface;
> public bool fEnabled;
> public ROUTER_INTERFACE_TYPE dwIfType;
> public ROUTER_CONNECTION_STATE dwConnectionState;
> public UnreachabilityReasons fUnReachabilityReasons;
> public int dwLastError;
> }
>
>