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 tcptrack D script shows various information about TCP
28 * connections including acceptance and refusal of inbound and
29 * outbound connections as well as state changes.
30 *
31 * Usage: tcptrack
32 */
33
34#pragma D option quiet
35tcp:kernel::accept-established
36{
37	printf("Accept connection from %s:%d\tto %s:%d\n",
38		       args[2]->ip_saddr,
39		       args[4]->tcp_sport,
40		       args[2]->ip_daddr,
41		       args[4]->tcp_dport);
42
43}
44
45tcp:kernel::accept-refused
46{
47	printf("Refused connection from %s:%d\tto %s:%d\n", 
48		       args[2]->ip_daddr,
49		       args[4]->tcp_dport,
50		       args[2]->ip_saddr,
51		       args[4]->tcp_sport);
52
53}
54
55tcp:kernel::connect-established
56{
57	printf("Connection established to %s:%d from %s:%d\n",
58		       args[2]->ip_saddr,
59		       args[4]->tcp_sport,
60		       args[2]->ip_daddr,
61		       args[4]->tcp_dport);
62
63}
64
65tcp:kernel::connect-refused
66{
67	printf("Connection refused by %s:%d from %s:%d\n", 
68		       args[2]->ip_saddr,
69		       args[4]->tcp_sport,
70		       args[2]->ip_daddr,
71		       args[4]->tcp_dport);
72}
73
74tcp:kernel::state-change
75{
76	newstate = args[3]->tcps_state;
77	oldstate = args[5]->tcps_state;
78	printf("State changed from %s\t\t%s\n", tcp_state_string[oldstate],
79				     tcp_state_string[newstate]);
80}
81
82