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 siftr D script collects data from the SIFTR kernel module.
28 *
29 * Usage: siftr
30 */
31
32#pragma D option quiet
33tcp:kernel::siftr
34{
35	printf("direction %s state %s local %d remote %d\n",
36	       siftr_dir_string[args[0]->direction],
37	       tcp_state_string[args[0]->conn_state],
38	       args[0]->tcp_localport,
39	       args[0]->tcp_foreignport);
40	printf("snd_cwnd %d snd_wnd %d rcv_wnd %d snd_bwnd %d snd_ssthresh %d\n",
41	       args[0]->snd_cwnd,
42	       args[0]->snd_wnd,
43	       args[0]->rcv_wnd,
44	       args[0]->snd_bwnd,
45	       args[0]->snd_ssthresh);
46	printf("\tmax_seg_size %u smoothed_rtt %d sack_enabled %d\n",
47	       args[0]->max_seg_size,
48	       args[0]->smoothed_rtt,
49	       args[0]->sack_enabled);
50	printf("\tsnd_scale %d rcv_scale %d flags 0x%x rxt_length %d\n",
51	       args[0]->snd_scale,
52	       args[0]->rcv_scale,
53	       args[0]->flags,
54	       args[0]->rxt_length);
55	printf("\tsnd_buf_hiwater %u snd_buf_cc %u rcv_buf_hiwater %u\n",
56	       args[0]->snd_buf_hiwater,
57	       args[0]->snd_buf_cc,
58	       args[0]->rcv_buf_hiwater);
59	printf("\trcv_buf_cc %u sent_inflight_bytes %u t_segqlen %d\n",
60	       args[0]->rcv_buf_cc,
61	       args[0]->sent_inflight_bytes,
62	       args[0]->t_segqlen);
63	printf("\tflowid %u flowtype %u\n",
64	       args[0]->flowid,
65	       args[0]->flowtype);
66}
67