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 static void sigint_handler (int signal)
  79 {
  80         /* Make compiler happy */
  81         signal = 0;
  82         /* Exit the loop */
  83         opt_count = 0;
  84 }
  85
  86 static ping_context_t *context_create (void)
  87 {
  88         ping_context_t *ret;
  89
  90         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
  91                 return (NULL);
  92
  93         memset (ret, '\0', sizeof (ping_context_t));
  94
  95         ret->latency_min   = -1.0;
  96         ret->latency_max   = -1.0;
  97         ret->latency_total = 0.0;
  98         ret->latency_total_square = 0.0;
  99
 100         return (ret);
 101 }
 102
 103 static void context_destroy (ping_context_t *context)
 104 {
 105         free (context);
 106 }
 107
 108 static void usage_exit (const char *name)
 109 {
 110         fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval] host [host [host ...]]\n",
 111                         name);
 112         exit (1);
 113 }
 114
 115 static int read_options (int argc, char **argv)
 116 {
 117         int optchar;
 118
 119         while (1)
 120         {
 121                 optchar = getopt (argc, argv, "46c:hi:I:");
 122
 123                 if (optchar == -1)
 124                         break;
 125
 126                 switch (optchar)
 127                 {
 128                         case '4':
 129                         case '6':
 130                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 131                                 break;
 132
 133                         case 'c':
 134                                 {
 135                                         int new_count;
 136                                         new_count = atoi (optarg);
 137                                         if (new_count > 0)
 138                                                 opt_count = new_count;
 139                                 }
 140                                 break;
 141
 142                         case 'i':
 143                                 {
 144                                         double new_interval;
 145                                         new_interval = atof (optarg);
 146                                         if (new_interval >= 0.2)
 147                                                 opt_interval = new_interval;
 148                                 }
 149                                 break;
 150                         case 'I':
 151                                 {
 152                                         if (opt_srcaddr != NULL)
 153                                                 free (opt_srcaddr);
 154                                         opt_srcaddr = strdup (optarg);
 155                                 }
 156                                 break;
 157
 158                         case 'h':
 159                         default:
 160                                 usage_exit (argv[0]);
 161                 }
 162         }
 163
 164         return (optind);
 165 }
 166
 167 static void print_host (pingobj_iter_t *iter)
 168 {
 169         double          latency;
 170         unsigned int    sequence;
 171         size_t          buffer_len;
 172         size_t          data_len;
 173         ping_context_t *context;
 174
 175         buffer_len = sizeof (latency);
 176         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 177                         &latency, &buffer_len);
 178
 179         buffer_len = sizeof (sequence);
 180         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 181                         &sequence, &buffer_len);
 182
 183         data_len = 0;
 184         ping_iterator_get_info (iter, PING_INFO_DATA,
 185                         NULL, &data_len);
 186
 187         context = (ping_context_t *) ping_iterator_get_context (iter);
 188
 189         context->req_sent++;
 190         if (latency > 0.0)
 191         {
 192                 context->req_rcvd++;
 193                 context->latency_total += latency;
 194                 context->latency_total_square += (latency * latency);
 195
 196                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 197                         context->latency_max = latency;
 198                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 199                         context->latency_min = latency;
 200
 201                 printf ("%zu bytes from %s (%s): icmp_seq=%u time=%.2f ms\n",
 202                                 data_len,
 203                                 context->host, context->addr,
 204                                 sequence, latency);
 205         }
 206         else
 207         {
 208                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 209                                 context->host, context->addr,
 210                                 sequence);
 211         }
 212 }
 213
 214 static void time_normalize (struct timespec *ts)
 215 {
 216         while (ts->tv_nsec < 0)
 217         {
 218                 if (ts->tv_sec == 0)
 219                 {
 220                         ts->tv_nsec = 0;
 221                         return;
 222                 }
 223
 224                 ts->tv_sec  -= 1;
 225                 ts->tv_nsec += 1000000000;
 226         }
 227
 228         while (ts->tv_nsec >= 1000000000)
 229         {
 230                 ts->tv_sec  += 1;
 231                 ts->tv_nsec -= 1000000000;
 232         }
 233 }
 234
 235 static void time_calc (struct timespec *ts_dest,
 236                 const struct timespec *ts_int,
 237                 const struct timeval  *tv_begin,
 238                 const struct timeval  *tv_end)
 239 {
 240         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 241         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 242         time_normalize (ts_dest);
 243
 244         /* Assure that `(begin + interval) > end'.
 245          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 246          * which may be `unsigned. *sigh* */
 247         if ((tv_end->tv_sec > ts_dest->tv_sec)
 248                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 249                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 250         {
 251                 ts_dest->tv_sec  = 0;
 252                 ts_dest->tv_nsec = 0;
 253                 return;
 254         }
 255
 256         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 257         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 258         time_normalize (ts_dest);
 259 }
 260
 261 int main (int argc, char **argv)
 262 {
 263         pingobj_t      *ping;
 264         pingobj_iter_t *iter;
 265
 266         struct sigaction sigint_action;
 267
 268         struct timeval  tv_begin;
 269         struct timeval  tv_end;
 270         struct timespec ts_wait;
 271         struct timespec ts_int;
 272
 273         int optind;
 274         int i;
 275
 276         optind = read_options (argc, argv);
 277
 278         if (optind >= argc)
 279                 usage_exit (argv[0]);
 280
 281         if (geteuid () != 0)
 282         {
 283                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 284                 return (1);
 285         }
 286
 287         if ((ping = ping_construct ()) == NULL)
 288         {
 289                 fprintf (stderr, "ping_construct failed\n");
 290                 return (1);
 291         }
 292
 293         {
 294                 double temp_sec;
 295                 double temp_nsec;
 296
 297                 temp_nsec = modf (opt_interval, &temp_sec);
 298                 ts_int.tv_sec  = (time_t) temp_sec;
 299                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 300
 301                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 302         }
 303
 304         if (opt_addrfamily != PING_DEF_AF)
 305                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 306
 307         if (opt_srcaddr != NULL)
 308         {
 309                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 310                 {
 311                         fprintf (stderr, "Setting source address failed: %s\n",
 312                                         ping_get_error (ping));
 313                 }
 314         }
 315
 316         for (i = optind; i < argc; i++)
 317         {
 318                 if (ping_host_add (ping, argv[i]) < 0)
 319                 {
 320                         const char *errmsg = ping_get_error (ping);
 321
 322                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 323                         continue;
 324                 }
 325         }
 326
 327         /* Drop root privileges if we're setuid-root. */
 328         setuid (getuid ());
 329
 330         i = 0;
 331         for (iter = ping_iterator_get (ping);
 332                         iter != NULL;
 333                         iter = ping_iterator_next (iter))
 334         {
 335                 ping_context_t *context;
 336                 size_t buffer_size;
 337
 338                 context = context_create ();
 339
 340                 buffer_size = sizeof (context->host);
 341                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 342
 343                 buffer_size = sizeof (context->addr);
 344                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 345
 346                 buffer_size = 0;
 347                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 348
 349                 printf ("PING %s (%s) %zu bytes of data.\n",
 350                                 context->host, context->addr, buffer_size);
 351
 352                 ping_iterator_set_context (iter, (void *) context);
 353
 354                 i++;
 355         }
 356
 357         if (i == 0)
 358                 return (1);
 359
 360         memset (&sigint_action, '\0', sizeof (sigint_action));
 361         sigint_action.sa_handler = sigint_handler;
 362         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 363         {
 364                 perror ("sigaction");
 365                 return (1);
 366         }
 367
 368         while (opt_count != 0)
 369         {
 370                 int status;
 371
 372                 if (gettimeofday (&tv_begin, NULL) < 0)
 373                 {
 374                         perror ("gettimeofday");
 375                         return (1);
 376                 }
 377
 378                 if (ping_send (ping) < 0)
 379                 {
 380                         fprintf (stderr, "ping_send failed: %s\n",
 381                                         ping_get_error (ping));
 382                         return (1);
 383                 }
 384
 385                 for (iter = ping_iterator_get (ping);
 386                                 iter != NULL;
 387                                 iter = ping_iterator_next (iter))
 388                 {
 389                         print_host (iter);
 390                 }
 391                 fflush (stdout);
 392
 393                 /* Don't sleep in the last iteration */
 394                 if (opt_count == 1)
 395                         break;
 396
 397                 if (gettimeofday (&tv_end, NULL) < 0)
 398                 {
 399                         perror ("gettimeofday");
 400                         return (1);
 401                 }
 402
 403                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 404
 405                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 406                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 407                 {
 408                         if (errno != EINTR)
 409                         {
 410                                 perror ("nanosleep");
 411                                 break;
 412                         }
 413                         else if (opt_count == 0)
 414                         {
 415                                 /* sigint */
 416                                 break;
 417                         }
 418                 }
 419
 420                 if (opt_count > 0)
 421                         opt_count--;
 422         } /* while (opt_count != 0) */
 423
 424         for (iter = ping_iterator_get (ping);
 425                         iter != NULL;
 426                         iter = ping_iterator_next (iter))
 427         {
 428                 ping_context_t *context;
 429
 430                 context = ping_iterator_get_context (iter);
 431
 432                 printf ("\n--- %s ping statistics ---\n"
 433                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 434                                 context->host, context->req_sent, context->req_rcvd,
 435                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 436                                 context->latency_total);
 437
 438                 if (context->req_rcvd != 0)
 439                 {
 440                         double num_total;
 441                         double average;
 442                         double deviation;
 443
 444                         num_total = (double) context->req_rcvd;
 445
 446                         average = context->latency_total / num_total;
 447                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 448                                         / (num_total * (num_total - 1.0)));
 449
 450                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 451                                         context->latency_min,
 452                                         average,
 453                                         context->latency_max,
 454                                         deviation);
 455                 }
 456
 457                 ping_iterator_set_context (iter, NULL);
 458                 free (context);
 459         }
 460
 461         ping_destroy (ping);
 462
 463         return (0);
 464 }