3.5. libwrap

This function is basically used to check out that particular entry(host) is exists in configuration file(hosts.allow/hosts.deny) or not? It returns true or false respectively. It takes service, host and file as arguments.

Example Usage:

$libwrap->exists($service, $host, $file);

This function is used to get service name based on the language selection, usually for display purpose on page. It receives two arguments one is WebTool::UI object and another is service name. It returns translated service name.

Example Usage:

$libwrap->resolve_service($page, 'pptpd')

This function is used to add host to hosts.allow file. It receives service name and host(ip address or ALL) as arguments and update hosts.allow file by adding entry.

Example Usage:

$libwrap->allow_add($service, $host);

This function is used to delete host from hosts.allow file. It receives service name and host(ip address or ALL) as arguments and update hosts.allow file by deleting entry.

Example Usage:

$libwrap->allow_delete($service, $host);

This function is used to get information from configuration file(usually /etc/hosts.allow). It returns hash reference containing services as keys and allowed hosts as respective values (in terms of array reference).

Example Usage:

$allow = libwrap::allow_get();
foreach my $service (sort keys %{$allow}) {
     my @hosts = @{$allow->{$service}};
     ...
}