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  */
  32
  33 #include <rpc/rpc.h>
  34 #include <rpcsvc/spray.h>
  35
  36 #include <err.h>
  37 #include <limits.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41
  42 #ifndef SPRAYOVERHEAD
  43 #define SPRAYOVERHEAD   86
  44 #endif
  45
  46 static void     usage(void);
  47 static void     print_xferstats(unsigned int, int, double);
  48 static int      getnum(const char *);
  49
  50 /* spray buffer */
  51 char spray_buffer[SPRAYMAX];
  52
  53 /* RPC timeouts */
  54 struct timeval NO_DEFAULT = { -1, -1 };
  55 struct timeval ONE_WAY = { 0, 0 };
  56 struct timeval TIMEOUT = { 25, 0 };
  57
  58 int
  59 main(int argc, char *argv[])
  60 {
  61         spraycumul      host_stats;
  62         sprayarr        host_array;
  63         CLIENT *cl;
  64         int c;
  65         u_int i;
  66         u_int count = 0;
  67         int delay = 0;
  68         int length = 0;
  69         double xmit_time;                       /* time to receive data */
  70
  71         while ((c = getopt(argc, argv, "c:d:l:")) != -1) {
  72                 switch (c) {
  73                 case 'c':
  74                         count = getnum(optarg);
  75                         break;
  76                 case 'd':
  77                         delay = getnum(optarg);
  78                         break;
  79                 case 'l':
  80                         length = getnum(optarg);
  81                         break;
  82                 default:
  83                         usage();
  84                         /* NOTREACHED */
  85                 }
  86         }
  87         argc -= optind;
  88         argv += optind;
  89
  90         if (argc != 1) {
  91                 usage();
  92                 /* NOTREACHED */
  93         }
  94
  95
  96         /* Correct packet length. */
  97         if (length > SPRAYMAX) {
  98                 length = SPRAYMAX;
  99         } else if (length < SPRAYOVERHEAD) {
 100                 length = SPRAYOVERHEAD;
 101         } else {
 102                 /* The RPC portion of the packet is a multiple of 32 bits. */
 103                 length -= SPRAYOVERHEAD - 3;
 104                 length &= ~3;
 105                 length += SPRAYOVERHEAD;
 106         }
 107
 108
 109         /*
 110          * The default value of count is the number of packets required
 111          * to make the total stream size 100000 bytes.
 112          */
 113         if (!count) {
 114                 count = 100000 / length;
 115         }
 116
 117         /* Initialize spray argument */
 118         host_array.sprayarr_len = length - SPRAYOVERHEAD;
 119         host_array.sprayarr_val = spray_buffer;
 120
 121
 122         /* create connection with server */
 123         if ((cl = clnt_create(*argv, SPRAYPROG, SPRAYVERS, "udp")) == NULL) {
 124                 clnt_pcreateerror(getprogname());
 125                 exit(1);
 126         }
 127
 128         /*
 129          * For some strange reason, RPC 4.0 sets the default timeout,
 130          * thus timeouts specified in clnt_call() are always ignored.
 131          *
 132          * The following (undocumented) hack resets the internal state
 133          * of the client handle.
 134          */
 135         clnt_control(cl, CLSET_TIMEOUT, (caddr_t)&NO_DEFAULT);
 136
 137
 138         /* Clear server statistics */
 139         if (clnt_call(cl, SPRAYPROC_CLEAR, (xdrproc_t)xdr_void, NULL,
 140             (xdrproc_t)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,
 152                     &host_array, (xdrproc_t)xdr_void, NULL, ONE_WAY);
 153
 154                 if (delay) {
 155                         usleep(delay);
 156                 }
 157         }
 158
 159
 160         /* Collect statistics from server */
 161         if (clnt_call(cl, SPRAYPROC_GET, (xdrproc_t)xdr_void, NULL,
 162             (xdrproc_t)xdr_spraycumul, &host_stats, TIMEOUT) != RPC_SUCCESS) {
 163                 clnt_perror(cl, getprogname());
 164                 exit(1);
 165         }
 166
 167         xmit_time = host_stats.clock.sec +
 168                         (host_stats.clock.usec / 1000000.0);
 169
 170         printf ("\n\tin %.2f seconds elapsed time\n", xmit_time);
 171
 172
 173         /* report dropped packets */
 174         if (host_stats.counter != count) {
 175                 int packets_dropped = count - host_stats.counter;
 176
 177                 printf("\t%d packets (%.2f%%) dropped\n",
 178                         packets_dropped,
 179                         100.0 * packets_dropped / count );
 180         } else {
 181                 printf("\tno packets dropped\n");
 182         }
 183
 184         printf("Sent:");
 185         print_xferstats(count, length, xmit_time);
 186
 187         printf("Rcvd:");
 188         print_xferstats(host_stats.counter, length, xmit_time);
 189
 190         clnt_destroy(cl);
 191         exit (0);
 192 }
 193
 194
 195 static void
 196 print_xferstats(u_int packets, int packetlen, double xfertime)
 197 {
 198         int datalen;
 199         double pps;             /* packets per second */
 200         double bps;             /* bytes per second */
 201
 202         datalen = packets * packetlen;
 203         pps = packets / xfertime;
 204         bps = datalen / xfertime;
 205
 206         printf("\t%.0f packets/sec, ", pps);
 207
 208         if (bps >= 1024)
 209                 printf ("%.1fK ", bps / 1024);
 210         else
 211                 printf ("%.0f ", bps);
 212
 213         printf("bytes/sec\n");
 214 }
 215
 216 static int
 217 getnum(const char *arg)
 218 {
 219         char *ep;
 220         long tmp;
 221
 222         tmp = strtol(arg, &ep, 10);
 223         if (*ep != '\0' || tmp < INT_MIN || tmp > INT_MAX)
 224                 errx(1, "invalid value: %s", arg);
 225
 226         return((int)tmp);
 227 }
 228
 229 static void
 230 usage(void)
 231 {
 232         fprintf(stderr,
 233                 "usage: spray [-c count] [-l length] [-d delay] host\n");
 234         exit(1);
 235 }