usr.sbin/spray/spray.c

   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  * $FreeBSD: src/usr.sbin/spray/spray.c,v 1.5.2.2 2001/07/30 10:23:00 dd Exp $
  31  * $DragonFly: src/usr.sbin/spray/spray.c,v 1.4 2005/03/19 17:43:18 liamfoy Exp $
  32  */
  33
  34 #include <rpc/rpc.h>
  35 #include <rpcsvc/spray.h>
  36
  37 #include <err.h>
  38 #include <limits.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <unistd.h>
  42
  43 #ifndef SPRAYOVERHEAD
  44 #define SPRAYOVERHEAD   86
  45 #endif
  46
  47 static void     usage(void);
  48 static void     print_xferstats(unsigned int, int, double);
  49 static int      getnum(const char *);
  50
  51 /* spray buffer */
  52 char spray_buffer[SPRAYMAX];
  53
  54 /* RPC timeouts */
  55 struct timeval NO_DEFAULT = { -1, -1 };
  56 struct timeval ONE_WAY = { 0, 0 };
  57 struct timeval TIMEOUT = { 25, 0 };
  58
  59 int
  60 main(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 = getnum(optarg);
  76                         break;
  77                 case 'd':
  78                         delay = getnum(optarg);
  79                         break;
  80                 case 'l':
  81                         length = getnum(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         if ((cl = clnt_create(*argv, SPRAYPROG, SPRAYVERS, "udp")) == NULL) {
 125                 clnt_pcreateerror(getprogname());
 126                 exit(1);
 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                 clnt_perror(cl, getprogname());
 142                 exit(1);
 143         }
 144
 145         /* Spray server with packets */
 146         printf ("sending %u packets of lnth %d to %s ...", count, length,
 147             *argv);
 148         fflush (stdout);
 149
 150         for (i = 0; i < count; i++) {
 151                 clnt_call(cl, SPRAYPROC_SPRAY, (xdrproc_t)xdr_sprayarr, &host_array, xdr_void, NULL, ONE_WAY);
 152
 153                 if (delay) {
 154                         usleep(delay);
 155                 }
 156         }
 157
 158
 159         /* Collect statistics from server */
 160         if (clnt_call(cl, SPRAYPROC_GET, xdr_void, NULL, (xdrproc_t)xdr_spraycumul, &host_stats, TIMEOUT) != RPC_SUCCESS) {
 161                 clnt_perror(cl, getprogname());
 162                 exit(1);
 163         }
 164
 165         xmit_time = host_stats.clock.sec +
 166                         (host_stats.clock.usec / 1000000.0);
 167
 168         printf ("\n\tin %.2f seconds elapsed time\n", xmit_time);
 169
 170
 171         /* report dropped packets */
 172         if (host_stats.counter != count) {
 173                 int packets_dropped = count - host_stats.counter;
 174
 175                 printf("\t%d packets (%.2f%%) dropped\n",
 176                         packets_dropped,
 177                         100.0 * packets_dropped / count );
 178         } else {
 179                 printf("\tno packets dropped\n");
 180         }
 181
 182         printf("Sent:");
 183         print_xferstats(count, length, xmit_time);
 184
 185         printf("Rcvd:");
 186         print_xferstats(host_stats.counter, length, xmit_time);
 187
 188         clnt_destroy(cl);
 189         exit (0);
 190 }
 191
 192
 193 static void
 194 print_xferstats(u_int packets, int packetlen, double xfertime)
 195 {
 196         int datalen;
 197         double pps;             /* packets per second */
 198         double bps;             /* bytes per second */
 199
 200         datalen = packets * packetlen;
 201         pps = packets / xfertime;
 202         bps = datalen / xfertime;
 203
 204         printf("\t%.0f packets/sec, ", pps);
 205
 206         if (bps >= 1024)
 207                 printf ("%.1fK ", bps / 1024);
 208         else
 209                 printf ("%.0f ", bps);
 210
 211         printf("bytes/sec\n");
 212 }
 213
 214 static int
 215 getnum(const char *arg)
 216 {
 217         char *ep;
 218         long tmp;
 219
 220         tmp = strtol(arg, &ep, 10);
 221         if (*ep != NULL || tmp < INT_MIN || tmp > INT_MAX)
 222                 errx(1, "invalid value: %s", arg);
 223
 224         return((int)tmp);
 225 }
 226
 227 static void
 228 usage(void)
 229 {
 230         fprintf(stderr,
 231                 "usage: spray [-c count] [-l length] [-d delay] host\n");
 232         exit(1);
 233 }