Nortel Networks 4050 manual TunnelGuard support for API calls, Making API calls

Chapter 7 TunnelGuard SRS Builder 351

2In the Available Expressions area, select the desired expression and click the Delete Expression button.

Note: You cannot delete an expression that is used in a TunnelGuard rule.

TunnelGuard support for API calls

TunnelGuard can interact with other software vendor applications. In addition to its own checks, TunnelGuard can be configured to communicate with other applications and ask for their status. The result of the status check is treated the same as other checks and is reported back to the server. This capability allows administrators to use TunnelGuard to retrieve status from other software packages, such as personal firewalls and virus checkers, to make sure they are running properly.

Making API calls

TunnelGuard requires a Windows Platform DLL that implements at least one common entry point as described below.

Windows

#include <windows.h> /* return values */ #define STATUS_SUCCESS 0 #define STATUS _FAILURE -1 #define STATUS_REQUIRES_UPDATE 1 /* simple check */

int WINAPI CheckStatus(void);

This API blocks until one of the required status, as mentioned above, is returned in 10 seconds or less. If an answer is not returned in a timely manner, it is assumed the software is unavailable, and the call times out and returns an error message.

Nortel Secure Network Access Switch 4050 User Guide