spray.c revision 78780 
1/*
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by Winning Strategies, Inc.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef lint
32static const char rcsid[] =
33  "$FreeBSD: head/usr.sbin/spray/spray.c 78780 2001-06-25 21:12:52Z dd $";
34#endif /* not lint */
35
36#include <err.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <unistd.h>
40
41#include <rpc/rpc.h>
42#include <rpcsvc/spray.h>
43
44#ifndef SPRAYOVERHEAD
45#define SPRAYOVERHEAD	86
46#endif
47
48static void usage(void);
49static void print_xferstats(unsigned int, int, double);
50
51/* spray buffer */
52char spray_buffer[SPRAYMAX];
53
54/* RPC timeouts */
55struct timeval NO_DEFAULT = { -1, -1 };
56struct timeval ONE_WAY = { 0, 0 };
57struct timeval TIMEOUT = { 25, 0 };
58
59int
60main(int argc, char *argv[])
61{
62	spraycumul	host_stats;
63	sprayarr	host_array;
64	CLIENT *cl;
65	int c;
66	u_int i;
67	u_int count = 0;
68	int delay = 0;
69	int length = 0;
70	double xmit_time;			/* time to receive data */
71
72	while ((c = getopt(argc, argv, "c:d:l:")) != -1) {
73		switch (c) {
74		case 'c':
75			count = atoi(optarg);
76			break;
77		case 'd':
78			delay = atoi(optarg);
79			break;
80		case 'l':
81			length = atoi(optarg);
82			break;
83		default:
84			usage();
85			/* NOTREACHED */
86		}
87	}
88	argc -= optind;
89	argv += optind;
90
91	if (argc != 1) {
92		usage();
93		/* NOTREACHED */
94	}
95
96
97	/* Correct packet length. */
98	if (length > SPRAYMAX) {
99		length = SPRAYMAX;
100	} else if (length < SPRAYOVERHEAD) {
101		length = SPRAYOVERHEAD;
102	} else {
103		/* The RPC portion of the packet is a multiple of 32 bits. */
104		length -= SPRAYOVERHEAD - 3;
105		length &= ~3;
106		length += SPRAYOVERHEAD;
107	}
108
109
110	/*
111	 * The default value of count is the number of packets required
112	 * to make the total stream size 100000 bytes.
113	 */
114	if (!count) {
115		count = 100000 / length;
116	}
117
118	/* Initialize spray argument */
119	host_array.sprayarr_len = length - SPRAYOVERHEAD;
120	host_array.sprayarr_val = spray_buffer;
121
122
123	/* create connection with server */
124	cl = clnt_create(*argv, SPRAYPROG, SPRAYVERS, "udp");
125	if (cl == NULL)
126		errx(1, "%s", clnt_spcreateerror(NULL));
127
128
129	/*
130	 * For some strange reason, RPC 4.0 sets the default timeout,
131	 * thus timeouts specified in clnt_call() are always ignored.
132	 *
133	 * The following (undocumented) hack resets the internal state
134	 * of the client handle.
135	 */
136	clnt_control(cl, CLSET_TIMEOUT, (caddr_t)&NO_DEFAULT);
137
138
139	/* Clear server statistics */
140	if (clnt_call(cl, SPRAYPROC_CLEAR, xdr_void, NULL, xdr_void, NULL, TIMEOUT) != RPC_SUCCESS)
141		errx(1, "%s", clnt_sperror(cl, NULL));
142
143
144	/* Spray server with packets */
145	printf ("sending %u packets of lnth %d to %s ...", count, length,
146	    *argv);
147	fflush (stdout);
148
149	for (i = 0; i < count; i++) {
150		clnt_call(cl, SPRAYPROC_SPRAY, xdr_sprayarr, &host_array, xdr_void, NULL, ONE_WAY);
151
152		if (delay) {
153			usleep(delay);
154		}
155	}
156
157
158	/* Collect statistics from server */
159	if (clnt_call(cl, SPRAYPROC_GET, xdr_void, NULL, xdr_spraycumul, &host_stats, TIMEOUT) != RPC_SUCCESS)
160		errx(1, "%s", clnt_sperror(cl, NULL));
161
162	xmit_time = host_stats.clock.sec +
163			(host_stats.clock.usec / 1000000.0);
164
165	printf ("\n\tin %.2f seconds elapsed time\n", xmit_time);
166
167
168	/* report dropped packets */
169	if (host_stats.counter != count) {
170		int packets_dropped = count - host_stats.counter;
171
172		printf("\t%d packets (%.2f%%) dropped\n",
173			packets_dropped,
174			100.0 * packets_dropped / count );
175	} else {
176		printf("\tno packets dropped\n");
177	}
178
179	printf("Sent:");
180	print_xferstats(count, length, xmit_time);
181
182	printf("Rcvd:");
183	print_xferstats(host_stats.counter, length, xmit_time);
184
185	exit (0);
186}
187
188
189static void
190print_xferstats(u_int packets, int packetlen, double xfertime)
191{
192	int datalen;
193	double pps;		/* packets per second */
194	double bps;		/* bytes per second */
195
196	datalen = packets * packetlen;
197	pps = packets / xfertime;
198	bps = datalen / xfertime;
199
200	printf("\t%.0f packets/sec, ", pps);
201
202	if (bps >= 1024)
203		printf ("%.1fK ", bps / 1024);
204	else
205		printf ("%.0f ", bps);
206
207	printf("bytes/sec\n");
208}
209
210
211static void
212usage(void)
213{
214	fprintf(stderr,
215		"usage: spray [-c count] [-l length] [-d delay] host\n");
216	exit(1);
217}
218