Sun Java System Web Server 6.1 SP6 NSAPI Programmer's Guide


The session_dns function resolves the IP address of the client associated with a specified session into its DNS name. It returns a newly allocated string. You can use session_dns to change the numeric IP address into something more readable.

The session_maxdns function verifies that the client is who it claims to be; the session_dns function does not perform this verification.

Note –

This function works only if the DNS directive is enabled in the magnus.conf file. For more information, seeChapter 2, SAFs in the magnus.conf File


char *session_dns(Session *sn);


A string containing the host name, or NULL if the DNS name cannot be found for the IP address.


Session *sn is the Session.

The Session is the same as the one passed to your SAF.