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:hi:");
 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                         case 'h':
 149                         default:
 150                                 usage_exit (argv[0]);
 151                 }
 152         }
 153
 154         return (optind);
 155 }
 156
 157 void print_host (pingobj_iter_t *iter)
 158 {
 159         double          latency;
 160         unsigned int    sequence;
 161         size_t          buffer_len;
 162         size_t          data_len;
 163         ping_context_t *context;
 164
 165         buffer_len = sizeof (latency);
 166         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 167                         &latency, &buffer_len);
 168
 169         buffer_len = sizeof (sequence);
 170         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 171                         &sequence, &buffer_len);
 172
 173         data_len = 0;
 174         ping_iterator_get_info (iter, PING_INFO_DATA,
 175                         NULL, &data_len);
 176
 177         context = (ping_context_t *) ping_iterator_get_context (iter);
 178
 179         context->req_sent++;
 180         if (latency > 0.0)
 181         {
 182                 context->req_rcvd++;
 183                 context->latency_total += latency;
 184                 context->latency_total_square += (latency * latency);
 185
 186                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 187                         context->latency_max = latency;
 188                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 189                         context->latency_min = latency;
 190
 191                 printf ("%u bytes from %s (%s): icmp_seq=%u time=%.2f ms\n",
 192                                 (unsigned int) data_len,
 193                                 context->host, context->addr,
 194                                 (unsigned int) sequence, latency);
 195         }
 196         else
 197         {
 198                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 199                                 context->host, context->addr,
 200                                 (unsigned int) sequence);
 201         }
 202 }
 203
 204 void time_normalize (struct timespec *ts)
 205 {
 206         while (ts->tv_nsec < 0)
 207         {
 208                 if (ts->tv_sec == 0)
 209                 {
 210                         ts->tv_nsec = 0;
 211                         return;
 212                 }
 213
 214                 ts->tv_sec  -= 1;
 215                 ts->tv_nsec += 1000000000;
 216         }
 217
 218         while (ts->tv_nsec >= 1000000000)
 219         {
 220                 ts->tv_sec  += 1;
 221                 ts->tv_nsec -= 1000000000;
 222         }
 223 }
 224
 225 void time_calc (struct timespec *ts_dest,
 226                 const struct timespec *ts_int,
 227                 const struct timeval  *tv_begin,
 228                 const struct timeval  *tv_end)
 229 {
 230         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 231         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 232         time_normalize (ts_dest);
 233
 234         /* Assure that `(begin + interval) > end'.
 235          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 236          * which may be `unsigned. *sigh* */
 237         if ((tv_end->tv_sec > ts_dest->tv_sec)
 238                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 239                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 240         {
 241                 ts_dest->tv_sec  = 0;
 242                 ts_dest->tv_nsec = 0;
 243                 return;
 244         }
 245
 246         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 247         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 248         time_normalize (ts_dest);
 249 }
 250
 251 int main (int argc, char **argv)
 252 {
 253         pingobj_t      *ping;
 254         pingobj_iter_t *iter;
 255
 256         struct sigaction sigint_action;
 257
 258         struct timeval  tv_begin;
 259         struct timeval  tv_end;
 260         struct timespec ts_wait;
 261         struct timespec ts_int;
 262
 263         int optind;
 264         int i;
 265
 266         optind = read_options (argc, argv);
 267
 268         if (optind >= argc)
 269                 usage_exit (argv[0]);
 270
 271         if (geteuid () != 0)
 272         {
 273                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 274                 return (1);
 275         }
 276
 277         if ((ping = ping_construct ()) == NULL)
 278         {
 279                 fprintf (stderr, "ping_construct failed\n");
 280                 return (1);
 281         }
 282
 283         {
 284                 double temp_sec;
 285                 double temp_nsec;
 286
 287                 temp_nsec = modf (opt_interval, &temp_sec);
 288                 ts_int.tv_sec  = (time_t) temp_sec;
 289                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 290
 291                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 292         }
 293
 294         if (opt_addrfamily != PING_DEF_AF)
 295                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 296
 297         for (i = optind; i < argc; i++)
 298         {
 299                 if (ping_host_add (ping, argv[i]) > 0)
 300                 {
 301                         fprintf (stderr, "ping_host_add (%s) failed\n", argv[i]);
 302                         continue;
 303                 }
 304         }
 305
 306         for (iter = ping_iterator_get (ping);
 307                         iter != NULL;
 308                         iter = ping_iterator_next (iter))
 309         {
 310                 ping_context_t *context;
 311                 size_t buffer_size;
 312
 313                 context = context_create ();
 314
 315                 buffer_size = sizeof (context->host);
 316                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 317
 318                 buffer_size = sizeof (context->addr);
 319                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 320
 321                 buffer_size = 0;
 322                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 323
 324                 printf ("PING %s (%s) %u bytes of data.\n",
 325                                 context->host, context->addr, buffer_size);
 326
 327                 ping_iterator_set_context (iter, (void *) context);
 328         }
 329
 330         memset (&sigint_action, '\0', sizeof (sigint_action));
 331         sigint_action.sa_handler = sigint_handler;
 332         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 333         {
 334                 perror ("sigaction");
 335                 return (1);
 336         }
 337
 338         while (opt_count != 0)
 339         {
 340                 int status;
 341
 342                 if (gettimeofday (&tv_begin, NULL) < 0)
 343                 {
 344                         perror ("gettimeofday");
 345                         return (1);
 346                 }
 347
 348                 if (ping_send (ping) < 0)
 349                 {
 350                         fprintf (stderr, "ping_send failed\n");
 351                         return (1);
 352                 }
 353
 354                 for (iter = ping_iterator_get (ping);
 355                                 iter != NULL;
 356                                 iter = ping_iterator_next (iter))
 357                 {
 358                         print_host (iter);
 359                 }
 360                 fflush (stdout);
 361
 362                 /* Don't sleep in the last iteration */
 363                 if (opt_count == 1)
 364                         break;
 365
 366                 if (gettimeofday (&tv_end, NULL) < 0)
 367                 {
 368                         perror ("gettimeofday");
 369                         return (1);
 370                 }
 371
 372                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 373
 374                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 375                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 376                 {
 377                         if (errno != EINTR)
 378                         {
 379                                 perror ("nanosleep");
 380                                 break;
 381                         }
 382                         else if (opt_count == 0)
 383                         {
 384                                 /* sigint */
 385                                 break;
 386                         }
 387                 }
 388
 389                 if (opt_count > 0)
 390                         opt_count--;
 391         } /* while (opt_count != 0) */
 392
 393         for (iter = ping_iterator_get (ping);
 394                         iter != NULL;
 395                         iter = ping_iterator_next (iter))
 396         {
 397                 ping_context_t *context;
 398
 399                 context = ping_iterator_get_context (iter);
 400
 401                 printf ("\n--- %s ping statistics ---\n"
 402                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 403                                 context->host, context->req_sent, context->req_rcvd,
 404                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 405                                 context->latency_total);
 406
 407                 if (context->req_rcvd != 0)
 408                 {
 409                         double num_total;
 410                         double average;
 411                         double deviation;
 412
 413                         num_total = (double) context->req_rcvd;
 414
 415                         average = context->latency_total / num_total;
 416                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 417                                         / (num_total * (num_total - 1.0)));
 418
 419                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 420                                         context->latency_min,
 421                                         average,
 422                                         context->latency_max,
 423                                         deviation);
 424                 }
 425
 426                 ping_iterator_set_context (iter, NULL);
 427                 free (context);
 428         }
 429
 430         ping_destroy (ping);
 431
 432         return (0);
 433 }