Net::hostent - phpMan

NAME
    Net::hostent - by-name interface to Perl's built-in gethost*() functions

SYNOPSIS
     use Net::hostent;

DESCRIPTION
    This module's default exports override the core gethostbyname() and
    gethostbyaddr() functions, replacing them with versions that return
    "Net::hostent" objects. This object has methods that return the
    similarly named structure field name from the C's hostent structure from
    netdb.h; namely name, aliases, addrtype, length, and addr_list. The
    aliases and addr_list methods return array reference, the rest scalars.
    The addr method is equivalent to the zeroth element in the addr_list
    array reference.

    You may also import all the structure fields directly into your
    namespace as regular variables using the :FIELDS import tag. (Note that
    this still overrides your core functions.) Access these fields as
    variables named with a preceding "h_". Thus, "$host_obj->name()"
    corresponds to $h_name if you import the fields. Array references are
    available as regular array variables, so for example "@{
    $host_obj->aliases() }" would be simply @h_aliases.

    The gethost() function is a simple front-end that forwards a numeric
    argument to gethostbyaddr() by way of Socket::inet_aton, and the rest to
    gethostbyname().

    To access this functionality without the core overrides, pass the "use"
    an empty import list, and then access function functions with their full
    qualified names. On the other hand, the built-ins are still available
    via the "CORE::" pseudo-package.

EXAMPLES
     use Net::hostent;
     use Socket;

     @ARGV = ('netscape.com') unless @ARGV;

     for $host ( @ARGV ) {

        unless ($h = gethost($host)) {
            warn "$0: no such host: $host\n";
            next;
        }

        printf "\n%s is %s%s\n",
                $host,
                lc($h->name) eq lc($host) ? "" : "*really* ",
                $h->name;

        print "\taliases are ", join(", ", @{$h->aliases}), "\n"
                    if @{$h->aliases};

        if ( @{$h->addr_list} > 1 ) {
            my $i;
            for $addr ( @{$h->addr_list} ) {
                printf "\taddr #%d is [%s]\n", $i++, inet_ntoa($addr);
            }
        } else {
            printf "\taddress is [%s]\n", inet_ntoa($h->addr);
        }

        if ($h = gethostbyaddr($h->addr)) {
            if (lc($h->name) ne lc($host)) {
                printf "\tThat addr reverses to host %s!\n", $h->name;
                $host = $h->name;
                redo;
            }
        }
     }

NOTE
    While this class is currently implemented using the Class::Struct module
    to build a struct-like class, you shouldn't rely upon this.

AUTHOR
    Tom Christiansen

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