3 * Copyright (c) 2015 George V. Neville-Neil
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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
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13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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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
27 * The tcpstate D script shows TCP sockets transitioning between states.
32 #pragma D option quiet
35 printf("Old State\t\tNew State\n");
38 tcp:kernel::state-change
40 newstate = args[3]->tcps_state;
41 oldstate = args[5]->tcps_state;
42 printf("%s\t\t%s\n", tcp_state_string[oldstate],
43 tcp_state_string[newstate]);