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 static int     opt_send_ttl   = 64;
  78
  79 static void sigint_handler (int signal)
  80 {
  81         /* Make compiler happy */
  82         signal = 0;
  83         /* Exit the loop */
  84         opt_count = 0;
  85 }
  86
  87 static ping_context_t *context_create (void)
  88 {
  89         ping_context_t *ret;
  90
  91         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
  92                 return (NULL);
  93
  94         memset (ret, '\0', sizeof (ping_context_t));
  95
  96         ret->latency_min   = -1.0;
  97         ret->latency_max   = -1.0;
  98         ret->latency_total = 0.0;
  99         ret->latency_total_square = 0.0;
 100
 101         return (ret);
 102 }
 103
 104 static void context_destroy (ping_context_t *context)
 105 {
 106         free (context);
 107 }
 108
 109 static void usage_exit (const char *name)
 110 {
 111         int name_length;
 112
 113         name_length = (int) strlen (name);
 114
 115         fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval]\n"
 116                         "%*s[-t ttl] [-I srcaddr]\n"
 117                         "%*shost [host [host ...]]\n",
 118                         name,
 119                         8 + name_length, "",
 120                         8 + name_length, "");
 121         exit (1);
 122 }
 123
 124 static int read_options (int argc, char **argv)
 125 {
 126         int optchar;
 127
 128         while (1)
 129         {
 130                 optchar = getopt (argc, argv, "46c:hi:I:t:");
 131
 132                 if (optchar == -1)
 133                         break;
 134
 135                 switch (optchar)
 136                 {
 137                         case '4':
 138                         case '6':
 139                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 140                                 break;
 141
 142                         case 'c':
 143                                 {
 144                                         int new_count;
 145                                         new_count = atoi (optarg);
 146                                         if (new_count > 0)
 147                                                 opt_count = new_count;
 148                                 }
 149                                 break;
 150
 151                         case 'i':
 152                                 {
 153                                         double new_interval;
 154                                         new_interval = atof (optarg);
 155                                         if (new_interval < 0.001)
 156                                                 fprintf (stderr, "Ignoring invalid interval %g.\n",
 157                                                                 new_interval);
 158                                         else
 159                                                 opt_interval = new_interval;
 160                                 }
 161                                 break;
 162                         case 'I':
 163                                 {
 164                                         if (opt_srcaddr != NULL)
 165                                                 free (opt_srcaddr);
 166                                         opt_srcaddr = strdup (optarg);
 167                                 }
 168                                 break;
 169
 170                         case 't':
 171                         {
 172                                 int new_send_ttl;
 173                                 new_send_ttl = atoi (optarg);
 174                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 175                                         opt_send_ttl = new_send_ttl;
 176                                 else
 177                                         fprintf (stderr, "Invalid TTL argument: %s\n",
 178                                                         optarg);
 179                                 break;
 180                         }
 181
 182                         case 'h':
 183                         default:
 184                                 usage_exit (argv[0]);
 185                 }
 186         }
 187
 188         return (optind);
 189 }
 190
 191 static void print_host (pingobj_iter_t *iter)
 192 {
 193         double          latency;
 194         unsigned int    sequence;
 195         int             recv_ttl;
 196         size_t          buffer_len;
 197         size_t          data_len;
 198         ping_context_t *context;
 199
 200         latency = -1.0;
 201         buffer_len = sizeof (latency);
 202         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 203                         &latency, &buffer_len);
 204
 205         sequence = 0;
 206         buffer_len = sizeof (sequence);
 207         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 208                         &sequence, &buffer_len);
 209
 210         recv_ttl = -1;
 211         buffer_len = sizeof (recv_ttl);
 212         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 213                         &recv_ttl, &buffer_len);
 214
 215         data_len = 0;
 216         ping_iterator_get_info (iter, PING_INFO_DATA,
 217                         NULL, &data_len);
 218
 219         context = (ping_context_t *) ping_iterator_get_context (iter);
 220
 221         context->req_sent++;
 222         if (latency > 0.0)
 223         {
 224                 context->req_rcvd++;
 225                 context->latency_total += latency;
 226                 context->latency_total_square += (latency * latency);
 227
 228                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 229                         context->latency_max = latency;
 230                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 231                         context->latency_min = latency;
 232
 233                 printf ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i time=%.2f ms\n",
 234                                 data_len,
 235                                 context->host, context->addr,
 236                                 sequence, recv_ttl, latency);
 237         }
 238         else
 239         {
 240                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 241                                 context->host, context->addr,
 242                                 sequence);
 243         }
 244 }
 245
 246 static void time_normalize (struct timespec *ts)
 247 {
 248         while (ts->tv_nsec < 0)
 249         {
 250                 if (ts->tv_sec == 0)
 251                 {
 252                         ts->tv_nsec = 0;
 253                         return;
 254                 }
 255
 256                 ts->tv_sec  -= 1;
 257                 ts->tv_nsec += 1000000000;
 258         }
 259
 260         while (ts->tv_nsec >= 1000000000)
 261         {
 262                 ts->tv_sec  += 1;
 263                 ts->tv_nsec -= 1000000000;
 264         }
 265 }
 266
 267 static void time_calc (struct timespec *ts_dest,
 268                 const struct timespec *ts_int,
 269                 const struct timeval  *tv_begin,
 270                 const struct timeval  *tv_end)
 271 {
 272         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 273         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 274         time_normalize (ts_dest);
 275
 276         /* Assure that `(begin + interval) > end'.
 277          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 278          * which may be `unsigned. *sigh* */
 279         if ((tv_end->tv_sec > ts_dest->tv_sec)
 280                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 281                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 282         {
 283                 ts_dest->tv_sec  = 0;
 284                 ts_dest->tv_nsec = 0;
 285                 return;
 286         }
 287
 288         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 289         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 290         time_normalize (ts_dest);
 291 }
 292
 293 int main (int argc, char **argv)
 294 {
 295         pingobj_t      *ping;
 296         pingobj_iter_t *iter;
 297
 298         struct sigaction sigint_action;
 299
 300         struct timeval  tv_begin;
 301         struct timeval  tv_end;
 302         struct timespec ts_wait;
 303         struct timespec ts_int;
 304
 305         int optind;
 306         int i;
 307
 308         optind = read_options (argc, argv);
 309
 310         if (optind >= argc)
 311                 usage_exit (argv[0]);
 312
 313         if (geteuid () != 0)
 314         {
 315                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 316                 return (1);
 317         }
 318
 319         if ((ping = ping_construct ()) == NULL)
 320         {
 321                 fprintf (stderr, "ping_construct failed\n");
 322                 return (1);
 323         }
 324
 325         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 326         {
 327                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 328                                 opt_send_ttl, ping_get_error (ping));
 329         }
 330
 331         {
 332                 double temp_sec;
 333                 double temp_nsec;
 334
 335                 temp_nsec = modf (opt_interval, &temp_sec);
 336                 ts_int.tv_sec  = (time_t) temp_sec;
 337                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 338
 339                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 340         }
 341
 342         if (opt_addrfamily != PING_DEF_AF)
 343                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 344
 345         if (opt_srcaddr != NULL)
 346         {
 347                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 348                 {
 349                         fprintf (stderr, "Setting source address failed: %s\n",
 350                                         ping_get_error (ping));
 351                 }
 352         }
 353
 354         for (i = optind; i < argc; i++)
 355         {
 356                 if (ping_host_add (ping, argv[i]) < 0)
 357                 {
 358                         const char *errmsg = ping_get_error (ping);
 359
 360                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 361                         continue;
 362                 }
 363         }
 364
 365         /* Drop root privileges if we're setuid-root. */
 366         setuid (getuid ());
 367
 368         i = 0;
 369         for (iter = ping_iterator_get (ping);
 370                         iter != NULL;
 371                         iter = ping_iterator_next (iter))
 372         {
 373                 ping_context_t *context;
 374                 size_t buffer_size;
 375
 376                 context = context_create ();
 377
 378                 buffer_size = sizeof (context->host);
 379                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 380
 381                 buffer_size = sizeof (context->addr);
 382                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 383
 384                 buffer_size = 0;
 385                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 386
 387                 printf ("PING %s (%s) %zu bytes of data.\n",
 388                                 context->host, context->addr, buffer_size);
 389
 390                 ping_iterator_set_context (iter, (void *) context);
 391
 392                 i++;
 393         }
 394
 395         if (i == 0)
 396                 return (1);
 397
 398         memset (&sigint_action, '\0', sizeof (sigint_action));
 399         sigint_action.sa_handler = sigint_handler;
 400         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 401         {
 402                 perror ("sigaction");
 403                 return (1);
 404         }
 405
 406         while (opt_count != 0)
 407         {
 408                 int status;
 409
 410                 if (gettimeofday (&tv_begin, NULL) < 0)
 411                 {
 412                         perror ("gettimeofday");
 413                         return (1);
 414                 }
 415
 416                 if (ping_send (ping) < 0)
 417                 {
 418                         fprintf (stderr, "ping_send failed: %s\n",
 419                                         ping_get_error (ping));
 420                         return (1);
 421                 }
 422
 423                 for (iter = ping_iterator_get (ping);
 424                                 iter != NULL;
 425                                 iter = ping_iterator_next (iter))
 426                 {
 427                         print_host (iter);
 428                 }
 429                 fflush (stdout);
 430
 431                 /* Don't sleep in the last iteration */
 432                 if (opt_count == 1)
 433                         break;
 434
 435                 if (gettimeofday (&tv_end, NULL) < 0)
 436                 {
 437                         perror ("gettimeofday");
 438                         return (1);
 439                 }
 440
 441                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 442
 443                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 444                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 445                 {
 446                         if (errno != EINTR)
 447                         {
 448                                 perror ("nanosleep");
 449                                 break;
 450                         }
 451                         else if (opt_count == 0)
 452                         {
 453                                 /* sigint */
 454                                 break;
 455                         }
 456                 }
 457
 458                 if (opt_count > 0)
 459                         opt_count--;
 460         } /* while (opt_count != 0) */
 461
 462         for (iter = ping_iterator_get (ping);
 463                         iter != NULL;
 464                         iter = ping_iterator_next (iter))
 465         {
 466                 ping_context_t *context;
 467
 468                 context = ping_iterator_get_context (iter);
 469
 470                 printf ("\n--- %s ping statistics ---\n"
 471                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 472                                 context->host, context->req_sent, context->req_rcvd,
 473                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 474                                 context->latency_total);
 475
 476                 if (context->req_rcvd != 0)
 477                 {
 478                         double num_total;
 479                         double average;
 480                         double deviation;
 481
 482                         num_total = (double) context->req_rcvd;
 483
 484                         average = context->latency_total / num_total;
 485                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 486                                         / (num_total * (num_total - 1.0)));
 487
 488                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 489                                         context->latency_min,
 490                                         average,
 491                                         context->latency_max,
 492                                         deviation);
 493                 }
 494
 495                 ping_iterator_set_context (iter, NULL);
 496                 context_destroy (context);
 497         }
 498
 499         ping_destroy (ping);
 500
 501         return (0);
 502 }