Sun Java System Web Server 6.1 SP9 NSAPI Programmer's Guide


The net_ip2host function transforms a textual IP address into a fully-qualified domain name and returns it.

Note –

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


char *net_ip2host(char *ip, int verify);


A new string containing the fully-qualified domain name if the transformation was accomplished, or NULL if the transformation was not accomplished.


char *ip is the IP address as a character string in dotted-decimal notation: nnn.nnn.nnn.nnn

int verify, if nonzero, specifies that the function should verify the fully-qualified domain name. Though this requires an extra query, you should use it when checking access control.