Nortel Networks Nortel Secure Network Access Switch 4050 Manuel d'utilisateur télécharger pdf (Page 351)

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Chapter 7 TunnelGuard SRS Builder 351

Nortel Secure Network Access Switch 4050 User Guide

2 In the Available Expressions area, select the desired expression and click the

Delete Expression button.

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.

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

rule.

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Nortel Networks Nortel Secure Network Access Switch 4050 Manuel d'utilisateur Page 351

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