1Netsend and Netreceive 2---------------------- 3 4This pair of binaries is used to fixed rate UDP performance testing. 5 6The netreceive tool consists solely of a UDP packet sink bound to a 7specified UDP port. Packets received on its port are copied to user space 8and discarded. 9 10The netsend tool acts as a packet source, generating packets of the 11specified size at the specified rate to a target IP address and port 12number: 13 14 netsend [ip] [port] [payloadsize] [rate] [duration] 15 16The payloadsize field specifies the size of the UDP payload, not the total 17packet size, which will also include a variety of headers (typically, 18ethernet, IP, and UDP). 19 20The rate indicates the number of packets/second to attempt to deliver. 21 22The duration is the duration of the run in seconds. 23 24The netsend tool will wait for around two seconds to synchronize with the 25wall clock for timing purposes. It will then busy-wait between packet 26transmits. 27 28The netsend/netreceive tools are under the following copyright and 29license: 30 31/*- 32 * Copyright (c) 2004 Robert N. M. Watson 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57$FreeBSD: releng/11.0/tools/tools/netrate/README 135042 2004-09-10 19:09:50Z rwatson $ 58