An example of usage of these Perl modules can be found in the System RADIUS Client Daemon project on Freshmeat here - From the code base for the next (and long overdue) release for this project ...

#!/usr/bin/perl

use Net::Radius::Dictionary;
use Net::Radius::Packet ();
use Socket;

.
.
.

sub build_radius_packet {
    my (%attribute) = @_;
    my $packet = Net::Radius::Packet->new($CONFIG->{'dictionary'});
    if (defined $packet) {
        $packet->set_code('Accounting-Request');
        $packet->set_identifier(inet_ntoa(inet_aton($CONFIG->{'hostnam
+e'})));
        $packet->set_authenticator(undef);
        $packet->set_attr($_, $attribute{$_}) foreach sort keys %attri
+bute;
        $packet->dump if $CONFIG->{'debug'};
    }
    return $packet;
}


sub send_radius_packet {
    my ($packet) = @_;
    my $response;
    return undef unless socket(SOCK_UDP, PF_INET, SOCK_DGRAM, getproto
+byname('udp'));
    my $data = Net::Radius::Packet::auth_resp($packet->pack, $CONFIG->
+{'secret'});
    for (1..$CONFIG->{'retry'}) {
        send(SOCK_UDP, $data, 0, $remote_addr);
        sleep 1;
        vec(my $rbit, fileno(SOCK_UDP), 1) = 1;
        vec(my $wbit, fileno(SOCK_UDP), 1) = 1;
        $response = select($rbit, $wbit, ($rbit | $wbit), $CONFIG->{'t
+imeout'});
        last if $response > 1;
    }
    close(SOCK_UDP);
    return $response;
}
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