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; only version 2 of the License is
   8  * applicable.
   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 char   *opt_srcaddr    = NULL;
  76 static int     opt_count      = -1;
  77
  78 void sigint_handler (int signal)
  79 {
  80         /* Exit the loop */
  81         opt_count = 0;
  82 }
  83
  84 ping_context_t *context_create (void)
  85 {
  86         ping_context_t *ret;
  87
  88         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
  89                 return (NULL);
  90
  91         memset (ret, '\0', sizeof (ping_context_t));
  92
  93         ret->latency_min   = -1.0;
  94         ret->latency_max   = -1.0;
  95         ret->latency_total = 0.0;
  96         ret->latency_total_square = 0.0;
  97
  98         return (ret);
  99 }
 100
 101 void context_destroy (ping_context_t *context)
 102 {
 103         free (context);
 104 }
 105
 106 void usage_exit (const char *name)
 107 {
 108         fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval] host [host [host ...]]\n",
 109                         name);
 110         exit (1);
 111 }
 112
 113 int read_options (int argc, char **argv)
 114 {
 115         int optchar;
 116
 117         while (1)
 118         {
 119                 optchar = getopt (argc, argv, "46c:hi:I:");
 120
 121                 if (optchar == -1)
 122                         break;
 123
 124                 switch (optchar)
 125                 {
 126                         case '4':
 127                         case '6':
 128                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 129                                 break;
 130
 131                         case 'c':
 132                                 {
 133                                         int new_count;
 134                                         new_count = atoi (optarg);
 135                                         if (new_count > 0)
 136                                                 opt_count = new_count;
 137                                 }
 138                                 break;
 139
 140                         case 'i':
 141                                 {
 142                                         double new_interval;
 143                                         new_interval = atof (optarg);
 144                                         if (new_interval >= 0.2)
 145                                                 opt_interval = new_interval;
 146                                 }
 147                                 break;
 148                         case 'I':
 149                                 {
 150                                         if (opt_srcaddr != NULL)
 151                                                 free (opt_srcaddr);
 152                                         opt_srcaddr = strdup (optarg);
 153                                 }
 154                                 break;
 155
 156                         case 'h':
 157                         default:
 158                                 usage_exit (argv[0]);
 159                 }
 160         }
 161
 162         return (optind);
 163 }
 164
 165 void print_host (pingobj_iter_t *iter)
 166 {
 167         double          latency;
 168         unsigned int    sequence;
 169         size_t          buffer_len;
 170         size_t          data_len;
 171         ping_context_t *context;
 172
 173         buffer_len = sizeof (latency);
 174         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 175                         &latency, &buffer_len);
 176
 177         buffer_len = sizeof (sequence);
 178         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 179                         &sequence, &buffer_len);
 180
 181         data_len = 0;
 182         ping_iterator_get_info (iter, PING_INFO_DATA,
 183                         NULL, &data_len);
 184
 185         context = (ping_context_t *) ping_iterator_get_context (iter);
 186
 187         context->req_sent++;
 188         if (latency > 0.0)
 189         {
 190                 context->req_rcvd++;
 191                 context->latency_total += latency;
 192                 context->latency_total_square += (latency * latency);
 193
 194                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 195                         context->latency_max = latency;
 196                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 197                         context->latency_min = latency;
 198
 199                 printf ("%u bytes from %s (%s): icmp_seq=%u time=%.2f ms\n",
 200                                 (unsigned int) data_len,
 201                                 context->host, context->addr,
 202                                 (unsigned int) sequence, latency);
 203         }
 204         else
 205         {
 206                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 207                                 context->host, context->addr,
 208                                 (unsigned int) sequence);
 209         }
 210 }
 211
 212 void time_normalize (struct timespec *ts)
 213 {
 214         while (ts->tv_nsec < 0)
 215         {
 216                 if (ts->tv_sec == 0)
 217                 {
 218                         ts->tv_nsec = 0;
 219                         return;
 220                 }
 221
 222                 ts->tv_sec  -= 1;
 223                 ts->tv_nsec += 1000000000;
 224         }
 225
 226         while (ts->tv_nsec >= 1000000000)
 227         {
 228                 ts->tv_sec  += 1;
 229                 ts->tv_nsec -= 1000000000;
 230         }
 231 }
 232
 233 void time_calc (struct timespec *ts_dest,
 234                 const struct timespec *ts_int,
 235                 const struct timeval  *tv_begin,
 236                 const struct timeval  *tv_end)
 237 {
 238         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 239         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 240         time_normalize (ts_dest);
 241
 242         /* Assure that `(begin + interval) > end'.
 243          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 244          * which may be `unsigned. *sigh* */
 245         if ((tv_end->tv_sec > ts_dest->tv_sec)
 246                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 247                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 248         {
 249                 ts_dest->tv_sec  = 0;
 250                 ts_dest->tv_nsec = 0;
 251                 return;
 252         }
 253
 254         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 255         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 256         time_normalize (ts_dest);
 257 }
 258
 259 int main (int argc, char **argv)
 260 {
 261         pingobj_t      *ping;
 262         pingobj_iter_t *iter;
 263
 264         struct sigaction sigint_action;
 265
 266         struct timeval  tv_begin;
 267         struct timeval  tv_end;
 268         struct timespec ts_wait;
 269         struct timespec ts_int;
 270
 271         int optind;
 272         int i;
 273
 274         optind = read_options (argc, argv);
 275
 276         if (optind >= argc)
 277                 usage_exit (argv[0]);
 278
 279         if (geteuid () != 0)
 280         {
 281                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 282                 return (1);
 283         }
 284
 285         if ((ping = ping_construct ()) == NULL)
 286         {
 287                 fprintf (stderr, "ping_construct failed\n");
 288                 return (1);
 289         }
 290
 291         {
 292                 double temp_sec;
 293                 double temp_nsec;
 294
 295                 temp_nsec = modf (opt_interval, &temp_sec);
 296                 ts_int.tv_sec  = (time_t) temp_sec;
 297                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 298
 299                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 300         }
 301
 302         if (opt_addrfamily != PING_DEF_AF)
 303                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 304
 305         if (opt_srcaddr != NULL)
 306         {
 307                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 308                 {
 309                         fprintf (stderr, "Setting source address failed: %s\n",
 310                                         ping_get_error (ping));
 311                 }
 312         }
 313
 314         for (i = optind; i < argc; i++)
 315         {
 316                 if (ping_host_add (ping, argv[i]) < 0)
 317                 {
 318                         const char *errmsg = ping_get_error (ping);
 319
 320                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 321                         continue;
 322                 }
 323         }
 324
 325         i = 0;
 326         for (iter = ping_iterator_get (ping);
 327                         iter != NULL;
 328                         iter = ping_iterator_next (iter))
 329         {
 330                 ping_context_t *context;
 331                 size_t buffer_size;
 332
 333                 context = context_create ();
 334
 335                 buffer_size = sizeof (context->host);
 336                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 337
 338                 buffer_size = sizeof (context->addr);
 339                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 340
 341                 buffer_size = 0;
 342                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 343
 344                 printf ("PING %s (%s) %u bytes of data.\n",
 345                                 context->host, context->addr, (unsigned int) buffer_size);
 346
 347                 ping_iterator_set_context (iter, (void *) context);
 348
 349                 i++;
 350         }
 351
 352         if (i == 0)
 353                 return (1);
 354
 355         memset (&sigint_action, '\0', sizeof (sigint_action));
 356         sigint_action.sa_handler = sigint_handler;
 357         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 358         {
 359                 perror ("sigaction");
 360                 return (1);
 361         }
 362
 363         while (opt_count != 0)
 364         {
 365                 int status;
 366
 367                 if (gettimeofday (&tv_begin, NULL) < 0)
 368                 {
 369                         perror ("gettimeofday");
 370                         return (1);
 371                 }
 372
 373                 if (ping_send (ping) < 0)
 374                 {
 375                         fprintf (stderr, "ping_send failed\n");
 376                         return (1);
 377                 }
 378
 379                 for (iter = ping_iterator_get (ping);
 380                                 iter != NULL;
 381                                 iter = ping_iterator_next (iter))
 382                 {
 383                         print_host (iter);
 384                 }
 385                 fflush (stdout);
 386
 387                 /* Don't sleep in the last iteration */
 388                 if (opt_count == 1)
 389                         break;
 390
 391                 if (gettimeofday (&tv_end, NULL) < 0)
 392                 {
 393                         perror ("gettimeofday");
 394                         return (1);
 395                 }
 396
 397                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 398
 399                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 400                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 401                 {
 402                         if (errno != EINTR)
 403                         {
 404                                 perror ("nanosleep");
 405                                 break;
 406                         }
 407                         else if (opt_count == 0)
 408                         {
 409                                 /* sigint */
 410                                 break;
 411                         }
 412                 }
 413
 414                 if (opt_count > 0)
 415                         opt_count--;
 416         } /* while (opt_count != 0) */
 417
 418         for (iter = ping_iterator_get (ping);
 419                         iter != NULL;
 420                         iter = ping_iterator_next (iter))
 421         {
 422                 ping_context_t *context;
 423
 424                 context = ping_iterator_get_context (iter);
 425
 426                 printf ("\n--- %s ping statistics ---\n"
 427                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 428                                 context->host, context->req_sent, context->req_rcvd,
 429                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 430                                 context->latency_total);
 431
 432                 if (context->req_rcvd != 0)
 433                 {
 434                         double num_total;
 435                         double average;
 436                         double deviation;
 437
 438                         num_total = (double) context->req_rcvd;
 439
 440                         average = context->latency_total / num_total;
 441                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 442                                         / (num_total * (num_total - 1.0)));
 443
 444                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 445                                         context->latency_min,
 446                                         average,
 447                                         context->latency_max,
 448                                         deviation);
 449                 }
 450
 451                 ping_iterator_set_context (iter, NULL);
 452                 free (context);
 453         }
 454
 455         ping_destroy (ping);
 456
 457         return (0);
 458 }