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📄 blocking(2.01 KB)
📄 disklatency(2.18 KB)
📄 disklatencycmd(2.41 KB)
📄 hotopen(1.88 KB)
📄 nfsattrstats(2.36 KB)
📄 nfsclienttime(2.14 KB)
📄 siftr(2.65 KB)
📄 tcpconn(1.7 KB)
📄 tcpdebug(5.83 KB)
📄 tcpstate(1.71 KB)
📄 tcptrack(2.58 KB)
📄 udptrack(1.89 KB)

Editing: udptrack

#!/usr/sbin/dtrace -s
/*
 * Copyright (c) 2015 George V. Neville-Neil
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 *
 * The udptrack D script shows various information about UDP
 * data that are sent and received on the host.
 *
 * Usage: udptrack
 */

#pragma D option quiet
udp:kernel::receive
{
	printf("Received %d bytes of data from %s:%d\n",
	       args[4]->udp_length,
	       args[2]->ip_saddr,
	       args[4]->udp_sport);
	tracemem(args[4]->udp_hdr, 64);
}

udp:kernel::send
{
	printf("Sent %d bytes of data to %s:%d\n", 
	       args[4]->udp_length,
	       args[2]->ip_daddr,
	       args[4]->udp_dport);
	tracemem(args[4]->udp_hdr, 64);
}

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Editing: udptrack

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