1#!/usr/sbin/dtrace -s
2/*
3 * Copyright (c) 2015 George V. Neville-Neil
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * The udptrack D script shows various information about UDP
28 * data that are sent and received on the host.
29 *
30 * Usage: udptrack
31 */
32
33#pragma D option quiet
34udp:kernel::receive
35{
36	printf("Received %d bytes of data from %s:%d\n",
37	       args[4]->udp_length,
38	       args[2]->ip_saddr,
39	       args[4]->udp_sport);
40	tracemem(args[4]->udp_hdr, 64);
41}
42
43udp:kernel::send
44{
45	printf("Sent %d bytes of data to %s:%d\n", 
46	       args[4]->udp_length,
47	       args[2]->ip_daddr,
48	       args[4]->udp_dport);
49	tracemem(args[4]->udp_hdr, 64);
50}
51
52