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 char   *opt_filename   = NULL;
  77 static int     opt_count      = -1;
  78 static int     opt_send_ttl   = 64;
  79
  80 static void sigint_handler (int signal)
  81 {
  82         /* Make compiler happy */
  83         signal = 0;
  84         /* Exit the loop */
  85         opt_count = 0;
  86 }
  87
  88 static ping_context_t *context_create (void)
  89 {
  90         ping_context_t *ret;
  91
  92         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
  93                 return (NULL);
  94
  95         memset (ret, '\0', sizeof (ping_context_t));
  96
  97         ret->latency_min   = -1.0;
  98         ret->latency_max   = -1.0;
  99         ret->latency_total = 0.0;
 100         ret->latency_total_square = 0.0;
 101
 102         return (ret);
 103 }
 104
 105 static void context_destroy (ping_context_t *context)
 106 {
 107         free (context);
 108 }
 109
 110 static void usage_exit (const char *name)
 111 {
 112         int name_length;
 113
 114         name_length = (int) strlen (name);
 115
 116         fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval]\n"
 117                         "%*s[-t ttl] [-I srcaddr]\n"
 118                         "%*s-f filename | host [host [host ...]]\n",
 119                         name,
 120                         8 + name_length, "",
 121                         8 + name_length, "");
 122         exit (1);
 123 }
 124
 125 static int read_options (int argc, char **argv)
 126 {
 127         int optchar;
 128
 129         while (1)
 130         {
 131                 optchar = getopt (argc, argv, "46c:hi:I:t:f:");
 132
 133                 if (optchar == -1)
 134                         break;
 135
 136                 switch (optchar)
 137                 {
 138                         case '4':
 139                         case '6':
 140                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 141                                 break;
 142
 143                         case 'c':
 144                                 {
 145                                         int new_count;
 146                                         new_count = atoi (optarg);
 147                                         if (new_count > 0)
 148                                                 opt_count = new_count;
 149                                         else
 150                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 151                                                                 optarg);
 152                                 }
 153                                 break;
 154
 155                         case 'f':
 156                                 {
 157                                         if (opt_filename != NULL)
 158                                                 free (opt_filename);
 159                                         opt_filename = strdup (optarg);
 160                                 }
 161                                 break;
 162
 163                         case 'i':
 164                                 {
 165                                         double new_interval;
 166                                         new_interval = atof (optarg);
 167                                         if (new_interval < 0.001)
 168                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 169                                                                 optarg);
 170                                         else
 171                                                 opt_interval = new_interval;
 172                                 }
 173                                 break;
 174                         case 'I':
 175                                 {
 176                                         if (opt_srcaddr != NULL)
 177                                                 free (opt_srcaddr);
 178                                         opt_srcaddr = strdup (optarg);
 179                                 }
 180                                 break;
 181
 182                         case 't':
 183                         {
 184                                 int new_send_ttl;
 185                                 new_send_ttl = atoi (optarg);
 186                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 187                                         opt_send_ttl = new_send_ttl;
 188                                 else
 189                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 190                                                         optarg);
 191                                 break;
 192                         }
 193
 194                         case 'h':
 195                         default:
 196                                 usage_exit (argv[0]);
 197                 }
 198         }
 199
 200         return (optind);
 201 }
 202
 203 static void print_host (pingobj_iter_t *iter)
 204 {
 205         double          latency;
 206         unsigned int    sequence;
 207         int             recv_ttl;
 208         size_t          buffer_len;
 209         size_t          data_len;
 210         ping_context_t *context;
 211
 212         latency = -1.0;
 213         buffer_len = sizeof (latency);
 214         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 215                         &latency, &buffer_len);
 216
 217         sequence = 0;
 218         buffer_len = sizeof (sequence);
 219         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 220                         &sequence, &buffer_len);
 221
 222         recv_ttl = -1;
 223         buffer_len = sizeof (recv_ttl);
 224         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 225                         &recv_ttl, &buffer_len);
 226
 227         data_len = 0;
 228         ping_iterator_get_info (iter, PING_INFO_DATA,
 229                         NULL, &data_len);
 230
 231         context = (ping_context_t *) ping_iterator_get_context (iter);
 232
 233         context->req_sent++;
 234         if (latency > 0.0)
 235         {
 236                 context->req_rcvd++;
 237                 context->latency_total += latency;
 238                 context->latency_total_square += (latency * latency);
 239
 240                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 241                         context->latency_max = latency;
 242                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 243                         context->latency_min = latency;
 244
 245                 printf ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i time=%.2f ms\n",
 246                                 data_len,
 247                                 context->host, context->addr,
 248                                 sequence, recv_ttl, latency);
 249         }
 250         else
 251         {
 252                 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 253                                 context->host, context->addr,
 254                                 sequence);
 255         }
 256 }
 257
 258 static void time_normalize (struct timespec *ts)
 259 {
 260         while (ts->tv_nsec < 0)
 261         {
 262                 if (ts->tv_sec == 0)
 263                 {
 264                         ts->tv_nsec = 0;
 265                         return;
 266                 }
 267
 268                 ts->tv_sec  -= 1;
 269                 ts->tv_nsec += 1000000000;
 270         }
 271
 272         while (ts->tv_nsec >= 1000000000)
 273         {
 274                 ts->tv_sec  += 1;
 275                 ts->tv_nsec -= 1000000000;
 276         }
 277 }
 278
 279 static void time_calc (struct timespec *ts_dest,
 280                 const struct timespec *ts_int,
 281                 const struct timeval  *tv_begin,
 282                 const struct timeval  *tv_end)
 283 {
 284         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 285         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 286         time_normalize (ts_dest);
 287
 288         /* Assure that `(begin + interval) > end'.
 289          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 290          * which may be `unsigned. *sigh* */
 291         if ((tv_end->tv_sec > ts_dest->tv_sec)
 292                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 293                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 294         {
 295                 ts_dest->tv_sec  = 0;
 296                 ts_dest->tv_nsec = 0;
 297                 return;
 298         }
 299
 300         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 301         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 302         time_normalize (ts_dest);
 303 }
 304
 305 int main (int argc, char **argv)
 306 {
 307         pingobj_t      *ping;
 308         pingobj_iter_t *iter;
 309
 310         struct sigaction sigint_action;
 311
 312         struct timeval  tv_begin;
 313         struct timeval  tv_end;
 314         struct timespec ts_wait;
 315         struct timespec ts_int;
 316
 317         int optind;
 318         int i;
 319
 320         optind = read_options (argc, argv);
 321
 322         if ((optind >= argc) && (opt_filename == NULL)) {
 323                 usage_exit (argv[0]);
 324         }
 325
 326         if (geteuid () != 0)
 327         {
 328                 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
 329                 return (1);
 330         }
 331
 332         if ((ping = ping_construct ()) == NULL)
 333         {
 334                 fprintf (stderr, "ping_construct failed\n");
 335                 return (1);
 336         }
 337
 338         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 339         {
 340                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 341                                 opt_send_ttl, ping_get_error (ping));
 342         }
 343
 344         {
 345                 double temp_sec;
 346                 double temp_nsec;
 347
 348                 temp_nsec = modf (opt_interval, &temp_sec);
 349                 ts_int.tv_sec  = (time_t) temp_sec;
 350                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 351
 352                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 353         }
 354
 355         if (opt_addrfamily != PING_DEF_AF)
 356                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 357
 358         if (opt_srcaddr != NULL)
 359         {
 360                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 361                 {
 362                         fprintf (stderr, "Setting source address failed: %s\n",
 363                                         ping_get_error (ping));
 364                 }
 365         }
 366
 367         if (opt_filename != NULL)
 368         {
 369                 FILE *infile;
 370                 char line[256];
 371                 char host[256];
 372
 373                 if (strcmp (opt_filename, "-") == 0)
 374                         /* Open STDIN */
 375                         infile = fdopen(0, "r");
 376                 else
 377                         infile = fopen(opt_filename, "r");
 378
 379                 if (infile == NULL)
 380                 {
 381                         fprintf (stderr, "Opening %s failed: %s\n",
 382                                         (strcmp (opt_filename, "-") == 0)
 383                                         ? "STDIN" : opt_filename,
 384                                         strerror(errno));
 385                         return (1);
 386                 }
 387
 388                 while (fgets(line, sizeof(line), infile))
 389                 {
 390                         /* Strip whitespace */
 391                         if (sscanf(line, "%s", host) != 1)
 392                                 continue;
 393
 394                         if ((host[0] == 0) || (host[0] == '#'))
 395                                 continue;
 396
 397                         if (ping_host_add(ping, host) < 0)
 398                         {
 399                                 const char *errmsg = ping_get_error (ping);
 400
 401                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 402                                 continue;
 403                         }
 404                 }
 405
 406                 fclose(infile);
 407         }
 408
 409         for (i = optind; i < argc; i++)
 410         {
 411                 if (ping_host_add (ping, argv[i]) < 0)
 412                 {
 413                         const char *errmsg = ping_get_error (ping);
 414
 415                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 416                         continue;
 417                 }
 418         }
 419
 420         /* Drop root privileges if we're setuid-root. */
 421         setuid (getuid ());
 422
 423         i = 0;
 424         for (iter = ping_iterator_get (ping);
 425                         iter != NULL;
 426                         iter = ping_iterator_next (iter))
 427         {
 428                 ping_context_t *context;
 429                 size_t buffer_size;
 430
 431                 context = context_create ();
 432
 433                 buffer_size = sizeof (context->host);
 434                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 435
 436                 buffer_size = sizeof (context->addr);
 437                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 438
 439                 buffer_size = 0;
 440                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 441
 442                 printf ("PING %s (%s) %zu bytes of data.\n",
 443                                 context->host, context->addr, buffer_size);
 444
 445                 ping_iterator_set_context (iter, (void *) context);
 446
 447                 i++;
 448         }
 449
 450         if (i == 0)
 451                 return (1);
 452
 453         memset (&sigint_action, '\0', sizeof (sigint_action));
 454         sigint_action.sa_handler = sigint_handler;
 455         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 456         {
 457                 perror ("sigaction");
 458                 return (1);
 459         }
 460
 461         while (opt_count != 0)
 462         {
 463                 int status;
 464
 465                 if (gettimeofday (&tv_begin, NULL) < 0)
 466                 {
 467                         perror ("gettimeofday");
 468                         return (1);
 469                 }
 470
 471                 if (ping_send (ping) < 0)
 472                 {
 473                         fprintf (stderr, "ping_send failed: %s\n",
 474                                         ping_get_error (ping));
 475                         return (1);
 476                 }
 477
 478                 for (iter = ping_iterator_get (ping);
 479                                 iter != NULL;
 480                                 iter = ping_iterator_next (iter))
 481                 {
 482                         print_host (iter);
 483                 }
 484                 fflush (stdout);
 485
 486                 /* Don't sleep in the last iteration */
 487                 if (opt_count == 1)
 488                         break;
 489
 490                 if (gettimeofday (&tv_end, NULL) < 0)
 491                 {
 492                         perror ("gettimeofday");
 493                         return (1);
 494                 }
 495
 496                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 497
 498                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 499                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 500                 {
 501                         if (errno != EINTR)
 502                         {
 503                                 perror ("nanosleep");
 504                                 break;
 505                         }
 506                         else if (opt_count == 0)
 507                         {
 508                                 /* sigint */
 509                                 break;
 510                         }
 511                 }
 512
 513                 if (opt_count > 0)
 514                         opt_count--;
 515         } /* while (opt_count != 0) */
 516
 517         for (iter = ping_iterator_get (ping);
 518                         iter != NULL;
 519                         iter = ping_iterator_next (iter))
 520         {
 521                 ping_context_t *context;
 522
 523                 context = ping_iterator_get_context (iter);
 524
 525                 printf ("\n--- %s ping statistics ---\n"
 526                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 527                                 context->host, context->req_sent, context->req_rcvd,
 528                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 529                                 context->latency_total);
 530
 531                 if (context->req_rcvd != 0)
 532                 {
 533                         double num_total;
 534                         double average;
 535                         double deviation;
 536
 537                         num_total = (double) context->req_rcvd;
 538
 539                         average = context->latency_total / num_total;
 540                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 541                                         / (num_total * (num_total - 1.0)));
 542
 543                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 544                                         context->latency_min,
 545                                         average,
 546                                         context->latency_max,
 547                                         deviation);
 548                 }
 549
 550                 ping_iterator_set_context (iter, NULL);
 551                 context_destroy (context);
 552         }
 553
 554         ping_destroy (ping);
 555
 556         return (0);
 557 }