src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <errno.h>
  29 # include <assert.h>
  30 #else
  31 # error "You don't have the standard C99 header files installed"
  32 #endif /* STDC_HEADERS */
  33
  34 #if HAVE_MATH_H
  35 # include <math.h>
  36 #endif
  37
  38 #if TIME_WITH_SYS_TIME
  39 # include <sys/time.h>
  40 # include <time.h>
  41 #else
  42 # if HAVE_SYS_TIME_H
  43 #  include <sys/time.h>
  44 # else
  45 #  include <time.h>
  46 # endif
  47 #endif
  48
  49 #if HAVE_NETDB_H
  50 # include <netdb.h> /* NI_MAXHOST */
  51 #endif
  52
  53 #if HAVE_SIGNAL_H
  54 # include <signal.h>
  55 #endif
  56
  57 #include "oping.h"
  58
  59 typedef struct ping_context
  60 {
  61         char host[NI_MAXHOST];
  62         char addr[NI_MAXHOST];
  63
  64         int req_sent;
  65         int req_rcvd;
  66
  67         double latency_min;
  68         double latency_max;
  69         double latency_total;
  70         double latency_total_square;
  71 } ping_context_t;
  72
  73 static double opt_interval   = 1.0;
  74 static int    opt_addrfamily = PING_DEF_AF;
  75 static int    opt_count      = -1;
  76
  77 void sigint_handler (int signal)
  78 {
  79         /* Exit the loop */
  80         opt_count = 0;
  81 }
  82
  83 ping_context_t *context_create (void)
  84 {
  85         ping_context_t *ret;
  86
  87         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
  88                 return (NULL);
  89
  90         memset (ret, '\0', sizeof (ping_context_t));
  91
  92         ret->latency_min   = -1.0;
  93         ret->latency_max   = -1.0;
  94         ret->latency_total = 0.0;
  95         ret->latency_total_square = 0.0;
  96
  97         return (ret);
  98 }
  99
 100 void context_destroy (ping_context_t *context)
 101 {
 102         free (context);
 103 }
 104
 105 void usage_exit (const char *name)
 106 {
 107         fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval] host [host [host ...]]\n",
 108                         name);
 109         exit (1);
 110 }
 111
 112 int read_options (int argc, char **argv)
 113 {
 114         int optchar;
 115
 116         while (1)
 117         {
 118                 optchar = getopt (argc, argv, "46c:i:");
 119
 120                 if (optchar == -1)
 121                         break;
 122
 123                 switch (optchar)
 124                 {
 125                         case '4':
 126                         case '6':
 127                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 128                                 break;
 129
 130                         case 'c':
 131                                 {
 132                                         int new_count;
 133                                         new_count = atoi (optarg);
 134                                         if (new_count > 0)
 135                                                 opt_count = new_count;
 136                                 }
 137                                 break;
 138
 139                         case 'i':
 140                                 {
 141                                         double new_interval;
 142                                         new_interval = atof (optarg);
 143                                         if (new_interval >= 0.2)
 144                                                 opt_interval = new_interval;
 145                                 }
 146                                 break;
 147
 148                         default:
 149                                 usage_exit (argv[0]);
 150                 }
 151         }
 152
 153         return (optind);
 154 }
 155
 156 void print_host (pingobj_iter_t *iter)
 157 {
 158         double   latency;
 159         uint16_t sequence;
 160         size_t   buffer_len;
 161         ping_context_t *context;
 162
 163         buffer_len = sizeof (latency);
 164         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 165                         &latency, &buffer_len);
 166
 167         buffer_len = sizeof (sequence);
 168         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 169                         &sequence, &buffer_len);
 170
 171         context = (ping_context_t *) ping_iterator_get_context (iter);
 172
 173         context->req_sent++;
 174         if (latency > 0.0)
 175         {
 176                 context->req_rcvd++;
 177                 context->latency_total += latency;
 178                 context->latency_total_square += (latency * latency);
 179
 180                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 181                         context->latency_max = latency;
 182                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 183                         context->latency_min = latency;
 184
 185                 printf ("echo reply from %s (%s): icmp_seq=%u time=%.1f ms\n",
 186                                 context->host, context->addr,
 187                                 (unsigned int) sequence, latency);
 188         }
 189         else
 190         {
 191                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 192                                 context->host, context->addr,
 193                                 (unsigned int) sequence);
 194         }
 195 }
 196
 197 void time_normalize (struct timespec *ts)
 198 {
 199         while (ts->tv_nsec < 0)
 200         {
 201                 if (ts->tv_sec == 0)
 202                 {
 203                         ts->tv_nsec = 0;
 204                         return;
 205                 }
 206
 207                 ts->tv_sec  -= 1;
 208                 ts->tv_nsec += 1000000000;
 209         }
 210
 211         while (ts->tv_nsec >= 1000000000)
 212         {
 213                 ts->tv_sec  += 1;
 214                 ts->tv_nsec -= 1000000000;
 215         }
 216 }
 217
 218 void time_calc (struct timespec *ts_dest,
 219                 const struct timespec *ts_int,
 220                 const struct timeval  *tv_begin,
 221                 const struct timeval  *tv_end)
 222 {
 223         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 224         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 225         time_normalize (ts_dest);
 226
 227         /* Assure that `(begin + interval) > end'.
 228          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 229          * which may be `unsigned. *sigh* */
 230         if ((tv_end->tv_sec > ts_dest->tv_sec)
 231                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 232                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 233         {
 234                 ts_dest->tv_sec  = 0;
 235                 ts_dest->tv_nsec = 0;
 236                 return;
 237         }
 238
 239         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 240         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 241         time_normalize (ts_dest);
 242 }
 243
 244 int main (int argc, char **argv)
 245 {
 246         pingobj_t      *ping;
 247         pingobj_iter_t *iter;
 248
 249         struct sigaction sigint_action;
 250
 251         struct timeval  tv_begin;
 252         struct timeval  tv_end;
 253         struct timespec ts_wait;
 254         struct timespec ts_int;
 255
 256         int optind;
 257         int i;
 258
 259         if (geteuid () != 0)
 260         {
 261                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 262                 return (1);
 263         }
 264
 265         optind = read_options (argc, argv);
 266
 267         if (optind >= argc)
 268                 usage_exit (argv[0]);
 269
 270         if ((ping = ping_construct ()) == NULL)
 271         {
 272                 fprintf (stderr, "ping_construct failed\n");
 273                 return (1);
 274         }
 275
 276         {
 277                 double temp_sec;
 278                 double temp_nsec;
 279
 280                 temp_nsec = modf (opt_interval, &temp_sec);
 281                 ts_int.tv_sec  = (time_t) temp_sec;
 282                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 283
 284                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 285         }
 286
 287         if (opt_addrfamily != PING_DEF_AF)
 288                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 289
 290         for (i = optind; i < argc; i++)
 291         {
 292                 if (ping_host_add (ping, argv[i]) > 0)
 293                 {
 294                         fprintf (stderr, "ping_host_add (%s) failed\n", argv[i]);
 295                         continue;
 296                 }
 297         }
 298
 299         for (iter = ping_iterator_get (ping);
 300                         iter != NULL;
 301                         iter = ping_iterator_next (iter))
 302         {
 303                 ping_context_t *context;
 304                 size_t buffer_size;
 305
 306                 context = context_create ();
 307
 308                 buffer_size = sizeof (context->host);
 309                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 310
 311                 buffer_size = sizeof (context->addr);
 312                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 313
 314                 ping_iterator_set_context (iter, (void *) context);
 315         }
 316
 317         memset (&sigint_action, '\0', sizeof (sigint_action));
 318         sigint_action.sa_handler = sigint_handler;
 319         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 320         {
 321                 perror ("sigaction");
 322                 return (1);
 323         }
 324
 325         while (opt_count != 0)
 326         {
 327                 int status;
 328
 329                 if (gettimeofday (&tv_begin, NULL) < 0)
 330                 {
 331                         perror ("gettimeofday");
 332                         return (1);
 333                 }
 334
 335                 if (ping_send (ping) < 0)
 336                 {
 337                         fprintf (stderr, "ping_send failed\n");
 338                         return (1);
 339                 }
 340
 341                 for (iter = ping_iterator_get (ping);
 342                                 iter != NULL;
 343                                 iter = ping_iterator_next (iter))
 344                 {
 345                         print_host (iter);
 346                 }
 347                 fflush (stdout);
 348
 349                 /* Don't sleep in the last iteration */
 350                 if (opt_count == 1)
 351                         break;
 352
 353                 if (gettimeofday (&tv_end, NULL) < 0)
 354                 {
 355                         perror ("gettimeofday");
 356                         return (1);
 357                 }
 358
 359                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 360
 361                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 362                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 363                 {
 364                         if (errno != EINTR)
 365                         {
 366                                 perror ("nanosleep");
 367                                 break;
 368                         }
 369                         else if (opt_count == 0)
 370                         {
 371                                 /* sigint */
 372                                 break;
 373                         }
 374                 }
 375
 376                 if (opt_count > 0)
 377                         opt_count--;
 378         } /* while (opt_count != 0) */
 379
 380         for (iter = ping_iterator_get (ping);
 381                         iter != NULL;
 382                         iter = ping_iterator_next (iter))
 383         {
 384                 ping_context_t *context;
 385                 double average;
 386                 double deviation;
 387
 388                 context = ping_iterator_get_context (iter);
 389
 390                 average = context->latency_total / ((double) context->req_rcvd);
 391                 deviation = context->latency_total_square / ((double) context->req_rcvd);
 392                 deviation = sqrt (deviation - (average * average));
 393
 394                 printf ("\n--- %s ping statistics ---\n"
 395                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n"
 396                                 "rtt min/avg/max/mdev = %.3f/%.3f/%.3f/%.3f ms\n",
 397                                 context->host, context->req_sent, context->req_rcvd,
 398                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 399                                 context->latency_total,
 400                                 context->latency_min,
 401                                 average,
 402                                 context->latency_max,
 403                                 deviation);
 404
 405                 ping_iterator_set_context (iter, NULL);
 406                 free (context);
 407         }
 408
 409         ping_destroy (ping);
 410
 411         return (0);
 412 }