#!/usr/bin/perl -w

if ( $ARGV[0] ) {

    if ( $ARGV[0] eq 'autoconf' ) {
        if ( -r '/bin/netstat') {
            print "yes\n";
            exit 0;
        }
        print "no\n";
        exit 0;

    } elsif ( $ARGV[0] eq 'config' ) {
        print <<EOM;
graph_title UDP Statistics
graph_args --base 1000 -l 0
graph_vlabel Packets/\${graph_period}
graph_category network
sent.label Sent
sent.draw LINE1
sent.type DERIVE
sent.min 0
received.label Received
received.draw AREA
received.type DERIVE
received.min 0
unknown_ports.label In Unknown Port
unknown_ports.draw LINE1
unknown_ports.type DERIVE
unknown_ports.min 0
receive_buffer_errors.label Receive Buffer Errors
receive_buffer_errors.draw LINE1
receive_buffer_errors.type DERIVE
receive_buffer_errors.min 0
send_buffer_errors.label Send Buffer Errors
send_buffer_errors.draw LINE1
send_buffer_errors.type DERIVE
send_buffer_errors.min 0
in_csum_errors.label In CSUM Errors
in_csum_errors.draw LINE1
in_csum_errors.type DERIVE
in_csum_errors.min 0
ignored_multis.label In Ignored Multis
ignored_multis.draw LINE1
ignored_multis.type DERIVE
ignored_multis.min 0
receive_errors.label Receive Errors
receive_errors.draw LINE1
receive_errors.type DERIVE
receive_errors.min 0
EOM
        exit 0;
    }
}

@netstat = qx{/bin/netstat -us | grep -A8 '^Udp:' | awk '/packets sent/          \{ print "sent.value " \$1 \}
                                      /packets received/      \{ print "received.value " \$1 \}
                                      /packets to unknown port received/      \{ print "unknown_ports.value " \$1 \}
                                      /receive buffer errors/      \{ print "receive_buffer_errors.value " \$1 \}
                                      /send buffer errors/      \{ print "send_buffer_errors.value " \$1 \}
                                      /InCsumErrors/      \{ print "in_csum_errors.value " \$2 \}
                                      /IgnoredMulti/      \{ print "ignored_multis.value " \$2 \}
                                      /packet receive errors/ \{ print "receive_errors.value " \$1 \}'};

print @netstat;