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