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