src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   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 <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 /* Remove GNU specific __attribute__ settings when using another compiler */
  93 #if !__GNUC__
  94 # define __attribute__(x) /**/
  95 #endif
  96
  97 typedef struct ping_context
  98 {
  99         char host[NI_MAXHOST];
 100         char addr[NI_MAXHOST];
 101
 102         int index;
 103         int req_sent;
 104         int req_rcvd;
 105
 106         double latency_min;
 107         double latency_max;
 108         double latency_total;
 109         double latency_total_square;
 110
 111 #if USE_NCURSES
 112         WINDOW *window;
 113 #endif
 114 } ping_context_t;
 115
 116 static double  opt_interval   = 1.0;
 117 static int     opt_addrfamily = PING_DEF_AF;
 118 static char   *opt_srcaddr    = NULL;
 119 static char   *opt_device     = NULL;
 120 static char   *opt_filename   = NULL;
 121 static int     opt_count      = -1;
 122 static int     opt_send_ttl   = 64;
 123 static uint8_t opt_send_qos   = 0;
 124 static double  opt_exit_status_threshold = 1.0;
 125
 126 static int host_num = 0;
 127
 128 #if USE_NCURSES
 129 static WINDOW *main_win = NULL;
 130 #endif
 131
 132 static void sigint_handler (int signal) /* {{{ */
 133 {
 134         /* Make compiler happy */
 135         signal = 0;
 136         /* Exit the loop */
 137         opt_count = 0;
 138 } /* }}} void sigint_handler */
 139
 140 static ping_context_t *context_create (void) /* {{{ */
 141 {
 142         ping_context_t *ret;
 143
 144         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 145                 return (NULL);
 146
 147         memset (ret, '\0', sizeof (ping_context_t));
 148
 149         ret->latency_min   = -1.0;
 150         ret->latency_max   = -1.0;
 151         ret->latency_total = 0.0;
 152         ret->latency_total_square = 0.0;
 153
 154 #if USE_NCURSES
 155         ret->window = NULL;
 156 #endif
 157
 158         return (ret);
 159 } /* }}} ping_context_t *context_create */
 160
 161 static void context_destroy (ping_context_t *context) /* {{{ */
 162 {
 163         if (context == NULL)
 164                 return;
 165
 166 #if USE_NCURSES
 167         if (context->window != NULL)
 168         {
 169                 delwin (context->window);
 170                 context->window = NULL;
 171         }
 172 #endif
 173
 174         free (context);
 175 } /* }}} void context_destroy */
 176
 177 static double context_get_average (ping_context_t *ctx) /* {{{ */
 178 {
 179         double num_total;
 180
 181         if (ctx == NULL)
 182                 return (-1.0);
 183
 184         if (ctx->req_rcvd < 1)
 185                 return (-0.0);
 186
 187         num_total = (double) ctx->req_rcvd;
 188         return (ctx->latency_total / num_total);
 189 } /* }}} double context_get_average */
 190
 191 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 192 {
 193         double num_total;
 194
 195         if (ctx == NULL)
 196                 return (-1.0);
 197
 198         if (ctx->req_rcvd < 1)
 199                 return (-0.0);
 200         else if (ctx->req_rcvd < 2)
 201                 return (0.0);
 202
 203         num_total = (double) ctx->req_rcvd;
 204         return (sqrt (((num_total * ctx->latency_total_square)
 205                                         - (ctx->latency_total * ctx->latency_total))
 206                                 / (num_total * (num_total - 1.0))));
 207 } /* }}} double context_get_stddev */
 208
 209 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 210 {
 211         if (ctx == NULL)
 212                 return (-1.0);
 213
 214         if (ctx->req_sent < 1)
 215                 return (0.0);
 216
 217         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 218                         / ((double) ctx->req_sent));
 219 } /* }}} double context_get_packet_loss */
 220
 221 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 222 {
 223         pingobj_iter_t *iter;
 224         int index;
 225
 226         if (ping == NULL)
 227                 return (EINVAL);
 228
 229         index = 0;
 230         for (iter = ping_iterator_get (ping);
 231                         iter != NULL;
 232                         iter = ping_iterator_next (iter))
 233         {
 234                 ping_context_t *context;
 235                 size_t buffer_size;
 236
 237                 context = context_create ();
 238                 context->index = index;
 239
 240                 buffer_size = sizeof (context->host);
 241                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 242
 243                 buffer_size = sizeof (context->addr);
 244                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 245
 246                 ping_iterator_set_context (iter, (void *) context);
 247
 248                 index++;
 249         }
 250
 251         return (0);
 252 } /* }}} int ping_initialize_contexts */
 253
 254 static void usage_exit (const char *name, int status) /* {{{ */
 255 {
 256         fprintf (stderr, "Usage: %s [OPTIONS] "
 257                                 "-f filename | host [host [host ...]]\n"
 258
 259                         "\nAvailable options:\n"
 260                         "  -4|-6        force the use of IPv4 or IPv6\n"
 261                         "  -c count     number of ICMP packets to send\n"
 262                         "  -i interval  interval with which to send ICMP packets\n"
 263                         "  -t ttl       time to live for each ICMP packet\n"
 264                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 265                         "               Use \"-Q help\" for a list of valid options.\n"
 266                         "  -I srcaddr   source address\n"
 267                         "  -D device    outgoing interface name\n"
 268                         "  -f filename  filename to read hosts from\n"
 269                         "  -Z percent   Exit with non-zero exit status if more than this percentage of\n"
 270                         "               probes timed out. (default: never)\n"
 271
 272                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 273                         "by Florian octo Forster <octo@verplant.org>\n"
 274                         "for contributions see `AUTHORS'\n",
 275                         name);
 276         exit (status);
 277 } /* }}} void usage_exit */
 278
 279 __attribute__((noreturn))
 280 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 281 {
 282         if (arg != 0)
 283                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 284
 285         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 286                         "\n"
 287                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 288                         "\n"
 289                         "    be                     Best Effort (BE, default PHB).\n"
 290                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 291                         "                           (low delay, low loss, low jitter)\n"
 292                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 293                         "                           (capacity-admitted traffic)\n"
 294                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 295                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 296                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 297                         "                           For example: \"cs1\" (priority traffic)\n"
 298                         "\n"
 299                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 300                         "\n"
 301                         "    lowdelay     (%#04x)    minimize delay\n"
 302                         "    throughput   (%#04x)    maximize throughput\n"
 303                         "    reliability  (%#04x)    maximize reliability\n"
 304                         "    mincost      (%#04x)    minimize monetary cost\n"
 305                         "\n"
 306                         "  Specify manually\n"
 307                         "\n"
 308                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 309                         "       0 -  255            Decimal numeric specification.\n"
 310                         "\n",
 311                         (unsigned int) IPTOS_LOWDELAY,
 312                         (unsigned int) IPTOS_THROUGHPUT,
 313                         (unsigned int) IPTOS_RELIABILITY,
 314                         (unsigned int) IPTOS_MINCOST);
 315
 316         exit (status);
 317 } /* }}} void usage_qos_exit */
 318
 319 static int set_opt_send_qos (const char *opt) /* {{{ */
 320 {
 321         if (opt == NULL)
 322                 return (EINVAL);
 323
 324         if (strcasecmp ("help", opt) == 0)
 325                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 326         /* DiffServ (RFC 2474): */
 327         /* - Best effort (BE) */
 328         else if (strcasecmp ("be", opt) == 0)
 329                 opt_send_qos = 0;
 330         /* - Expedited Forwarding (EF, RFC 3246) */
 331         else if (strcasecmp ("ef", opt) == 0)
 332                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 333         /* - Voice Admit (VA, RFC 5865) */
 334         else if (strcasecmp ("va", opt) == 0)
 335                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 336         /* - Assured Forwarding (AF, RFC 2597) */
 337         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 338                         && (strlen (opt) == 4))
 339         {
 340                 uint8_t dscp;
 341                 uint8_t class = 0;
 342                 uint8_t prec = 0;
 343
 344                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 345                 if (opt[2] == '1')
 346                         class = 1;
 347                 else if (opt[2] == '2')
 348                         class = 2;
 349                 else if (opt[2] == '3')
 350                         class = 3;
 351                 else if (opt[2] == '4')
 352                         class = 4;
 353                 else
 354                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 355
 356                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 357                 if (opt[3] == '1')
 358                         prec = 1;
 359                 else if (opt[3] == '2')
 360                         prec = 2;
 361                 else if (opt[3] == '3')
 362                         prec = 3;
 363                 else
 364                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 365
 366                 dscp = (8 * class) + (2 * prec);
 367                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 368                 opt_send_qos = dscp << 2;
 369         }
 370         /* - Class Selector (CS) */
 371         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 372                         && (strlen (opt) == 3))
 373         {
 374                 uint8_t class;
 375
 376                 if ((opt[2] < '0') || (opt[2] > '7'))
 377                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 378
 379                 /* Not exactly legal by the C standard, but I don't know of any
 380                  * system not supporting this hack. */
 381                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 382                 opt_send_qos = class << 5;
 383         }
 384         /* Type of Service (RFC 1349) */
 385         else if (strcasecmp ("lowdelay", opt) == 0)
 386                 opt_send_qos = IPTOS_LOWDELAY;
 387         else if (strcasecmp ("throughput", opt) == 0)
 388                 opt_send_qos = IPTOS_THROUGHPUT;
 389         else if (strcasecmp ("reliability", opt) == 0)
 390                 opt_send_qos = IPTOS_RELIABILITY;
 391         else if (strcasecmp ("mincost", opt) == 0)
 392                 opt_send_qos = IPTOS_MINCOST;
 393         /* Numeric value */
 394         else
 395         {
 396                 unsigned long value;
 397                 char *endptr;
 398
 399                 errno = 0;
 400                 endptr = NULL;
 401                 value = strtoul (opt, &endptr, /* base = */ 0);
 402                 if ((errno != 0) || (endptr == opt)
 403                                 || (endptr == NULL) || (*endptr != 0)
 404                                 || (value > 0xff))
 405                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 406
 407                 opt_send_qos = (uint8_t) value;
 408         }
 409
 410         return (0);
 411 } /* }}} int set_opt_send_qos */
 412
 413 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 414 {
 415         uint8_t dscp;
 416         uint8_t ecn;
 417         char *dscp_str;
 418         char *ecn_str;
 419
 420         dscp = qos >> 2;
 421         ecn = qos & 0x03;
 422
 423         switch (dscp)
 424         {
 425                 case 0x00: dscp_str = "be";  break;
 426                 case 0x2e: dscp_str = "ef";  break;
 427                 case 0x2d: dscp_str = "va";  break;
 428                 case 0x0a: dscp_str = "af11"; break;
 429                 case 0x0c: dscp_str = "af12"; break;
 430                 case 0x0e: dscp_str = "af13"; break;
 431                 case 0x12: dscp_str = "af21"; break;
 432                 case 0x14: dscp_str = "af22"; break;
 433                 case 0x16: dscp_str = "af23"; break;
 434                 case 0x1a: dscp_str = "af31"; break;
 435                 case 0x1c: dscp_str = "af32"; break;
 436                 case 0x1e: dscp_str = "af33"; break;
 437                 case 0x22: dscp_str = "af41"; break;
 438                 case 0x24: dscp_str = "af42"; break;
 439                 case 0x26: dscp_str = "af43"; break;
 440                 case 0x08: dscp_str = "cs1";  break;
 441                 case 0x10: dscp_str = "cs2";  break;
 442                 case 0x18: dscp_str = "cs3";  break;
 443                 case 0x20: dscp_str = "cs4";  break;
 444                 case 0x28: dscp_str = "cs5";  break;
 445                 case 0x30: dscp_str = "cs6";  break;
 446                 case 0x38: dscp_str = "cs7";  break;
 447                 default:   dscp_str = NULL;
 448         }
 449
 450         switch (ecn)
 451         {
 452                 case 0x01: ecn_str = ",ecn(1)"; break;
 453                 case 0x02: ecn_str = ",ecn(0)"; break;
 454                 case 0x03: ecn_str = ",ce"; break;
 455                 default:   ecn_str = "";
 456         }
 457
 458         if (dscp_str == NULL)
 459                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 460         else
 461                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 462         buffer[buffer_size - 1] = 0;
 463
 464         return (buffer);
 465 } /* }}} char *format_qos */
 466
 467 static int read_options (int argc, char **argv) /* {{{ */
 468 {
 469         int optchar;
 470
 471         while (1)
 472         {
 473                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:");
 474
 475                 if (optchar == -1)
 476                         break;
 477
 478                 switch (optchar)
 479                 {
 480                         case '4':
 481                         case '6':
 482                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 483                                 break;
 484
 485                         case 'c':
 486                                 {
 487                                         int new_count;
 488                                         new_count = atoi (optarg);
 489                                         if (new_count > 0)
 490                                                 opt_count = new_count;
 491                                         else
 492                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 493                                                                 optarg);
 494                                 }
 495                                 break;
 496
 497                         case 'f':
 498                                 {
 499                                         if (opt_filename != NULL)
 500                                                 free (opt_filename);
 501                                         opt_filename = strdup (optarg);
 502                                 }
 503                                 break;
 504
 505                         case 'i':
 506                                 {
 507                                         double new_interval;
 508                                         new_interval = atof (optarg);
 509                                         if (new_interval < 0.001)
 510                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 511                                                                 optarg);
 512                                         else
 513                                                 opt_interval = new_interval;
 514                                 }
 515                                 break;
 516                         case 'I':
 517                                 {
 518                                         if (opt_srcaddr != NULL)
 519                                                 free (opt_srcaddr);
 520                                         opt_srcaddr = strdup (optarg);
 521                                 }
 522                                 break;
 523
 524                         case 'D':
 525                                 opt_device = optarg;
 526                                 break;
 527
 528                         case 't':
 529                         {
 530                                 int new_send_ttl;
 531                                 new_send_ttl = atoi (optarg);
 532                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 533                                         opt_send_ttl = new_send_ttl;
 534                                 else
 535                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 536                                                         optarg);
 537                                 break;
 538                         }
 539
 540                         case 'Q':
 541                                 set_opt_send_qos (optarg);
 542                                 break;
 543
 544                         case 'Z':
 545                         {
 546                                 char *endptr = NULL;
 547                                 double tmp;
 548
 549                                 errno = 0;
 550                                 tmp = strtod (optarg, &endptr);
 551                                 if ((errno != 0) || (endptr == NULL) || (*endptr != 0) || (tmp < 0.0) || (tmp > 100.0))
 552                                 {
 553                                         fprintf (stderr, "Ignoring invalid -Z argument: %s\n", optarg);
 554                                         fprintf (stderr, "The \"-Z\" option requires a numeric argument between 0 and 100.\n");
 555                                 }
 556                                 else
 557                                         opt_exit_status_threshold = tmp / 100.0;
 558
 559                                 break;
 560                         }
 561
 562                         case 'h':
 563                                 usage_exit (argv[0], 0);
 564                                 break;
 565                         default:
 566                                 usage_exit (argv[0], 1);
 567                 }
 568         }
 569
 570         return (optind);
 571 } /* }}} read_options */
 572
 573 static void time_normalize (struct timespec *ts) /* {{{ */
 574 {
 575         while (ts->tv_nsec < 0)
 576         {
 577                 if (ts->tv_sec == 0)
 578                 {
 579                         ts->tv_nsec = 0;
 580                         return;
 581                 }
 582
 583                 ts->tv_sec  -= 1;
 584                 ts->tv_nsec += 1000000000;
 585         }
 586
 587         while (ts->tv_nsec >= 1000000000)
 588         {
 589                 ts->tv_sec  += 1;
 590                 ts->tv_nsec -= 1000000000;
 591         }
 592 } /* }}} void time_normalize */
 593
 594 static void time_calc (struct timespec *ts_dest, /* {{{ */
 595                 const struct timespec *ts_int,
 596                 const struct timeval  *tv_begin,
 597                 const struct timeval  *tv_end)
 598 {
 599         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 600         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 601         time_normalize (ts_dest);
 602
 603         /* Assure that `(begin + interval) > end'.
 604          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 605          * which may be `unsigned. *sigh* */
 606         if ((tv_end->tv_sec > ts_dest->tv_sec)
 607                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 608                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 609         {
 610                 ts_dest->tv_sec  = 0;
 611                 ts_dest->tv_nsec = 0;
 612                 return;
 613         }
 614
 615         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 616         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 617         time_normalize (ts_dest);
 618 } /* }}} void time_calc */
 619
 620 #if USE_NCURSES
 621 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 622 {
 623         if ((ctx == NULL) || (ctx->window == NULL))
 624                 return (EINVAL);
 625
 626         werase (ctx->window);
 627
 628         box (ctx->window, 0, 0);
 629         wattron (ctx->window, A_BOLD);
 630         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 631                         " %s ", ctx->host);
 632         wattroff (ctx->window, A_BOLD);
 633         wprintw (ctx->window, "ping statistics ");
 634         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 635                         "%i packets transmitted, %i received, %.2f%% packet "
 636                         "loss, time %.1fms",
 637                         ctx->req_sent, ctx->req_rcvd,
 638                         context_get_packet_loss (ctx),
 639                         ctx->latency_total);
 640         if (ctx->req_rcvd != 0)
 641         {
 642                 double average;
 643                 double deviation;
 644
 645                 average = context_get_average (ctx);
 646                 deviation = context_get_stddev (ctx);
 647
 648                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 649                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 650                                 ctx->latency_min,
 651                                 average,
 652                                 ctx->latency_max,
 653                                 deviation);
 654         }
 655
 656         wrefresh (ctx->window);
 657
 658         return (0);
 659 } /* }}} int update_stats_from_context */
 660
 661 static int on_resize (pingobj_t *ping) /* {{{ */
 662 {
 663         pingobj_iter_t *iter;
 664         int width = 0;
 665         int height = 0;
 666         int main_win_height;
 667
 668         getmaxyx (stdscr, height, width);
 669         if ((height < 1) || (width < 1))
 670                 return (EINVAL);
 671
 672         main_win_height = height - (4 * host_num);
 673         wresize (main_win, main_win_height, /* width = */ width);
 674         /* Allow scrolling */
 675         scrollok (main_win, TRUE);
 676         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 677         /* Allow hardware accelerated scrolling. */
 678         idlok (main_win, TRUE);
 679         wrefresh (main_win);
 680
 681         for (iter = ping_iterator_get (ping);
 682                         iter != NULL;
 683                         iter = ping_iterator_next (iter))
 684         {
 685                 ping_context_t *context;
 686
 687                 context = ping_iterator_get_context (iter);
 688                 if (context == NULL)
 689                         continue;
 690
 691                 if (context->window != NULL)
 692                 {
 693                         delwin (context->window);
 694                         context->window = NULL;
 695                 }
 696                 context->window = newwin (/* height = */ 4,
 697                                 /* width = */ width,
 698                                 /* y = */ main_win_height + (4 * context->index),
 699                                 /* x = */ 0);
 700         }
 701
 702         return (0);
 703 } /* }}} */
 704
 705 static int check_resize (pingobj_t *ping) /* {{{ */
 706 {
 707         int need_resize = 0;
 708
 709         while (42)
 710         {
 711                 int key = wgetch (stdscr);
 712                 if (key == ERR)
 713                         break;
 714                 else if (key == KEY_RESIZE)
 715                         need_resize = 1;
 716         }
 717
 718         if (need_resize)
 719                 return (on_resize (ping));
 720         else
 721                 return (0);
 722 } /* }}} int check_resize */
 723
 724 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 725 {
 726         pingobj_iter_t *iter;
 727         int width = 0;
 728         int height = 0;
 729         int main_win_height;
 730
 731         initscr ();
 732         cbreak ();
 733         noecho ();
 734         nodelay (stdscr, TRUE);
 735
 736         getmaxyx (stdscr, height, width);
 737         if ((height < 1) || (width < 1))
 738                 return (EINVAL);
 739
 740         if (has_colors () == TRUE)
 741         {
 742                 start_color ();
 743                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 744                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 745                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 746         }
 747
 748         main_win_height = height - (4 * host_num);
 749         main_win = newwin (/* height = */ main_win_height,
 750                         /* width = */ width,
 751                         /* y = */ 0, /* x = */ 0);
 752         /* Allow scrolling */
 753         scrollok (main_win, TRUE);
 754         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 755         /* Allow hardware accelerated scrolling. */
 756         idlok (main_win, TRUE);
 757         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 758         wrefresh (main_win);
 759
 760         for (iter = ping_iterator_get (ping);
 761                         iter != NULL;
 762                         iter = ping_iterator_next (iter))
 763         {
 764                 ping_context_t *context;
 765
 766                 context = ping_iterator_get_context (iter);
 767                 if (context == NULL)
 768                         continue;
 769
 770                 if (context->window != NULL)
 771                 {
 772                         delwin (context->window);
 773                         context->window = NULL;
 774                 }
 775                 context->window = newwin (/* height = */ 4,
 776                                 /* width = */ width,
 777                                 /* y = */ main_win_height + (4 * context->index),
 778                                 /* x = */ 0);
 779         }
 780
 781
 782         /* Don't know what good this does exactly, but without this code
 783          * "check_resize" will be called right after startup and *somehow*
 784          * this leads to display errors. If we purge all initial characters
 785          * here, the problem goes away. "wgetch" is non-blocking due to
 786          * "nodelay" (see above). */
 787         while (wgetch (stdscr) != ERR)
 788         {
 789                 /* eat up characters */;
 790         }
 791
 792         return (0);
 793 } /* }}} int pre_loop_hook */
 794
 795 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 796 {
 797         return (check_resize (ping));
 798 } /* }}} int pre_sleep_hook */
 799
 800 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 801 {
 802         return (check_resize (ping));
 803 } /* }}} int pre_sleep_hook */
 804 #else /* if !USE_NCURSES */
 805 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 806 {
 807         pingobj_iter_t *iter;
 808
 809         for (iter = ping_iterator_get (ping);
 810                         iter != NULL;
 811                         iter = ping_iterator_next (iter))
 812         {
 813                 ping_context_t *ctx;
 814                 size_t buffer_size;
 815
 816                 ctx = ping_iterator_get_context (iter);
 817                 if (ctx == NULL)
 818                         continue;
 819
 820                 buffer_size = 0;
 821                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 822
 823                 printf ("PING %s (%s) %zu bytes of data.\n",
 824                                 ctx->host, ctx->addr, buffer_size);
 825         }
 826
 827         return (0);
 828 } /* }}} int pre_loop_hook */
 829
 830 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 831 {
 832         fflush (stdout);
 833
 834         return (0);
 835 } /* }}} int pre_sleep_hook */
 836
 837 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 838 {
 839         return (0);
 840 } /* }}} int post_sleep_hook */
 841 #endif
 842
 843 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 844                 __attribute__((unused)) int index)
 845 {
 846         double          latency;
 847         unsigned int    sequence;
 848         int             recv_ttl;
 849         uint8_t         recv_qos;
 850         char            recv_qos_str[16];
 851         size_t          buffer_len;
 852         size_t          data_len;
 853         ping_context_t *context;
 854
 855         latency = -1.0;
 856         buffer_len = sizeof (latency);
 857         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 858                         &latency, &buffer_len);
 859
 860         sequence = 0;
 861         buffer_len = sizeof (sequence);
 862         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 863                         &sequence, &buffer_len);
 864
 865         recv_ttl = -1;
 866         buffer_len = sizeof (recv_ttl);
 867         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 868                         &recv_ttl, &buffer_len);
 869
 870         recv_qos = 0;
 871         buffer_len = sizeof (recv_qos);
 872         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 873                         &recv_qos, &buffer_len);
 874
 875         data_len = 0;
 876         ping_iterator_get_info (iter, PING_INFO_DATA,
 877                         NULL, &data_len);
 878
 879         context = (ping_context_t *) ping_iterator_get_context (iter);
 880
 881 #if USE_NCURSES
 882 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 883 #else
 884 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 885 #endif
 886
 887         context->req_sent++;
 888         if (latency > 0.0)
 889         {
 890                 context->req_rcvd++;
 891                 context->latency_total += latency;
 892                 context->latency_total_square += (latency * latency);
 893
 894                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 895                         context->latency_max = latency;
 896                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 897                         context->latency_min = latency;
 898
 899 #if USE_NCURSES
 900                 if (has_colors () == TRUE)
 901                 {
 902                         int color = OPING_GREEN;
 903                         double average = context_get_average (context);
 904                         double stddev = context_get_stddev (context);
 905
 906                         if ((latency < (average - (2 * stddev)))
 907                                         || (latency > (average + (2 * stddev))))
 908                                 color = OPING_RED;
 909                         else if ((latency < (average - stddev))
 910                                         || (latency > (average + stddev)))
 911                                 color = OPING_YELLOW;
 912
 913                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 914                                         data_len, context->host, context->addr,
 915                                         sequence, recv_ttl,
 916                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 917                         if ((recv_qos != 0) || (opt_send_qos != 0))
 918                         {
 919                                 HOST_PRINTF ("qos=%s ",
 920                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 921                         }
 922                         HOST_PRINTF ("time=");
 923                         wattron (main_win, COLOR_PAIR(color));
 924                         HOST_PRINTF ("%.2f", latency);
 925                         wattroff (main_win, COLOR_PAIR(color));
 926                         HOST_PRINTF (" ms\n");
 927                 }
 928                 else
 929                 {
 930 #endif
 931                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 932                                 data_len,
 933                                 context->host, context->addr,
 934                                 sequence, recv_ttl);
 935                 if ((recv_qos != 0) || (opt_send_qos != 0))
 936                 {
 937                         HOST_PRINTF ("qos=%s ",
 938                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 939                 }
 940                 HOST_PRINTF ("time=%.2f ms\n", latency);
 941 #if USE_NCURSES
 942                 }
 943 #endif
 944         }
 945         else
 946         {
 947 #if USE_NCURSES
 948                 if (has_colors () == TRUE)
 949                 {
 950                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 951                                         context->host, context->addr,
 952                                         sequence);
 953                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 954                         HOST_PRINTF ("timeout");
 955                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 956                         HOST_PRINTF ("\n");
 957                 }
 958                 else
 959                 {
 960 #endif
 961                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 962                                 context->host, context->addr,
 963                                 sequence);
 964 #if USE_NCURSES
 965                 }
 966 #endif
 967         }
 968
 969 #if USE_NCURSES
 970         update_stats_from_context (context);
 971         wrefresh (main_win);
 972 #endif
 973 } /* }}} void update_host_hook */
 974
 975 /* Prints statistics for each host, cleans up the contexts and returns the
 976  * number of hosts which failed to return more than the fraction
 977  * opt_exit_status_threshold of pings. */
 978 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 979 {
 980         pingobj_iter_t *iter;
 981         int failure_count = 0;
 982
 983 #if USE_NCURSES
 984         endwin ();
 985 #endif
 986
 987         for (iter = ping_iterator_get (ping);
 988                         iter != NULL;
 989                         iter = ping_iterator_next (iter))
 990         {
 991                 ping_context_t *context;
 992
 993                 context = ping_iterator_get_context (iter);
 994
 995                 printf ("\n--- %s ping statistics ---\n"
 996                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 997                                 context->host, context->req_sent, context->req_rcvd,
 998                                 context_get_packet_loss (context),
 999                                 context->latency_total);
1000
1001                 {
1002                         double pct_failed = 1.0 - (((double) context->req_rcvd)
1003                                         / ((double) context->req_sent));
1004                         if (pct_failed > opt_exit_status_threshold)
1005                                 failure_count++;
1006                 }
1007
1008                 if (context->req_rcvd != 0)
1009                 {
1010                         double average;
1011                         double deviation;
1012
1013                         average = context_get_average (context);
1014                         deviation = context_get_stddev (context);
1015
1016                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1017                                         context->latency_min,
1018                                         average,
1019                                         context->latency_max,
1020                                         deviation);
1021                 }
1022
1023                 ping_iterator_set_context (iter, NULL);
1024                 context_destroy (context);
1025         }
1026
1027         return (failure_count);
1028 } /* }}} int post_loop_hook */
1029
1030 int main (int argc, char **argv) /* {{{ */
1031 {
1032         pingobj_t      *ping;
1033         pingobj_iter_t *iter;
1034
1035         struct sigaction sigint_action;
1036
1037         struct timeval  tv_begin;
1038         struct timeval  tv_end;
1039         struct timespec ts_wait;
1040         struct timespec ts_int;
1041
1042         int optind;
1043         int i;
1044         int status;
1045 #if _POSIX_SAVED_IDS
1046         uid_t saved_set_uid;
1047
1048         /* Save the old effective user id */
1049         saved_set_uid = geteuid ();
1050         /* Set the effective user ID to the real user ID without changing the
1051          * saved set-user ID */
1052         status = seteuid (getuid ());
1053         if (status != 0)
1054         {
1055                 fprintf (stderr, "Temporarily dropping privileges "
1056                                 "failed: %s\n", strerror (errno));
1057                 exit (EXIT_FAILURE);
1058         }
1059 #endif
1060
1061         optind = read_options (argc, argv);
1062
1063 #if !_POSIX_SAVED_IDS
1064         /* Cannot temporarily drop privileges -> reject every file but "-". */
1065         if ((opt_filename != NULL)
1066                         && (strcmp ("-", opt_filename) != 0)
1067                         && (getuid () != geteuid ()))
1068         {
1069                 fprintf (stderr, "Your real and effective user IDs don't "
1070                                 "match. Reading from a file (option '-f')\n"
1071                                 "is therefore too risky. You can still read "
1072                                 "from STDIN using '-f -' if you like.\n"
1073                                 "Sorry.\n");
1074                 exit (EXIT_FAILURE);
1075         }
1076 #endif
1077
1078         if ((optind >= argc) && (opt_filename == NULL)) {
1079                 usage_exit (argv[0], 1);
1080         }
1081
1082         if ((ping = ping_construct ()) == NULL)
1083         {
1084                 fprintf (stderr, "ping_construct failed\n");
1085                 return (1);
1086         }
1087
1088         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1089         {
1090                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1091                                 opt_send_ttl, ping_get_error (ping));
1092         }
1093
1094         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1095         {
1096                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1097                                 opt_send_qos, ping_get_error (ping));
1098         }
1099
1100         {
1101                 double temp_sec;
1102                 double temp_nsec;
1103
1104                 temp_nsec = modf (opt_interval, &temp_sec);
1105                 ts_int.tv_sec  = (time_t) temp_sec;
1106                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1107
1108                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1109         }
1110
1111         if (opt_addrfamily != PING_DEF_AF)
1112                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1113
1114         if (opt_srcaddr != NULL)
1115         {
1116                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1117                 {
1118                         fprintf (stderr, "Setting source address failed: %s\n",
1119                                         ping_get_error (ping));
1120                 }
1121         }
1122
1123         if (opt_device != NULL)
1124         {
1125                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1126                 {
1127                         fprintf (stderr, "Setting device failed: %s\n",
1128                                         ping_get_error (ping));
1129                 }
1130         }
1131
1132         if (opt_filename != NULL)
1133         {
1134                 FILE *infile;
1135                 char line[256];
1136                 char host[256];
1137
1138                 if (strcmp (opt_filename, "-") == 0)
1139                         /* Open STDIN */
1140                         infile = fdopen(0, "r");
1141                 else
1142                         infile = fopen(opt_filename, "r");
1143
1144                 if (infile == NULL)
1145                 {
1146                         fprintf (stderr, "Opening %s failed: %s\n",
1147                                         (strcmp (opt_filename, "-") == 0)
1148                                         ? "STDIN" : opt_filename,
1149                                         strerror(errno));
1150                         return (1);
1151                 }
1152
1153 #if _POSIX_SAVED_IDS
1154                 /* Regain privileges */
1155                 status = seteuid (saved_set_uid);
1156                 if (status != 0)
1157                 {
1158                         fprintf (stderr, "Temporarily re-gaining privileges "
1159                                         "failed: %s\n", strerror (errno));
1160                         exit (EXIT_FAILURE);
1161                 }
1162 #endif
1163
1164                 while (fgets(line, sizeof(line), infile))
1165                 {
1166                         /* Strip whitespace */
1167                         if (sscanf(line, "%s", host) != 1)
1168                                 continue;
1169
1170                         if ((host[0] == 0) || (host[0] == '#'))
1171                                 continue;
1172
1173                         if (ping_host_add(ping, host) < 0)
1174                         {
1175                                 const char *errmsg = ping_get_error (ping);
1176
1177                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1178                                 continue;
1179                         }
1180                         else
1181                         {
1182                                 host_num++;
1183                         }
1184                 }
1185
1186 #if _POSIX_SAVED_IDS
1187                 /* Drop privileges */
1188                 status = seteuid (getuid ());
1189                 if (status != 0)
1190                 {
1191                         fprintf (stderr, "Temporarily dropping privileges "
1192                                         "failed: %s\n", strerror (errno));
1193                         exit (EXIT_FAILURE);
1194                 }
1195 #endif
1196
1197                 fclose(infile);
1198         }
1199
1200 #if _POSIX_SAVED_IDS
1201         /* Regain privileges */
1202         status = seteuid (saved_set_uid);
1203         if (status != 0)
1204         {
1205                 fprintf (stderr, "Temporarily re-gaining privileges "
1206                                 "failed: %s\n", strerror (errno));
1207                 exit (EXIT_FAILURE);
1208         }
1209 #endif
1210
1211         for (i = optind; i < argc; i++)
1212         {
1213                 if (ping_host_add (ping, argv[i]) < 0)
1214                 {
1215                         const char *errmsg = ping_get_error (ping);
1216
1217                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1218                         continue;
1219                 }
1220                 else
1221                 {
1222                         host_num++;
1223                 }
1224         }
1225
1226         /* Permanently drop root privileges if we're setuid-root. */
1227         status = setuid (getuid ());
1228         if (status != 0)
1229         {
1230                 fprintf (stderr, "Dropping privileges failed: %s\n",
1231                                 strerror (errno));
1232                 exit (EXIT_FAILURE);
1233         }
1234
1235 #if _POSIX_SAVED_IDS
1236         saved_set_uid = (uid_t) -1;
1237 #endif
1238
1239         ping_initialize_contexts (ping);
1240
1241         if (i == 0)
1242                 return (1);
1243
1244         memset (&sigint_action, '\0', sizeof (sigint_action));
1245         sigint_action.sa_handler = sigint_handler;
1246         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1247         {
1248                 perror ("sigaction");
1249                 return (1);
1250         }
1251
1252         pre_loop_hook (ping);
1253
1254         while (opt_count != 0)
1255         {
1256                 int index;
1257                 int status;
1258
1259                 if (gettimeofday (&tv_begin, NULL) < 0)
1260                 {
1261                         perror ("gettimeofday");
1262                         return (1);
1263                 }
1264
1265                 if (ping_send (ping) < 0)
1266                 {
1267                         fprintf (stderr, "ping_send failed: %s\n",
1268                                         ping_get_error (ping));
1269                         return (1);
1270                 }
1271
1272                 index = 0;
1273                 for (iter = ping_iterator_get (ping);
1274                                 iter != NULL;
1275                                 iter = ping_iterator_next (iter))
1276                 {
1277                         update_host_hook (iter, index);
1278                         index++;
1279                 }
1280
1281                 pre_sleep_hook (ping);
1282
1283                 /* Don't sleep in the last iteration */
1284                 if (opt_count == 1)
1285                         break;
1286
1287                 if (gettimeofday (&tv_end, NULL) < 0)
1288                 {
1289                         perror ("gettimeofday");
1290                         return (1);
1291                 }
1292
1293                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1294
1295                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1296                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1297                 {
1298                         if (errno != EINTR)
1299                         {
1300                                 perror ("nanosleep");
1301                                 break;
1302                         }
1303                         else if (opt_count == 0)
1304                         {
1305                                 /* sigint */
1306                                 break;
1307                         }
1308                 }
1309
1310                 post_sleep_hook (ping);
1311
1312                 if (opt_count > 0)
1313                         opt_count--;
1314         } /* while (opt_count != 0) */
1315
1316         /* Returns the number of failed hosts according to -Z. */
1317         status = post_loop_hook (ping);
1318
1319         ping_destroy (ping);
1320
1321         if (status == 0)
1322                 exit (EXIT_SUCCESS);
1323         else
1324         {
1325                 if (status > 255)
1326                         status = 255;
1327                 exit (status);
1328         }
1329 } /* }}} int main */
1330
1331 /* vim: set fdm=marker : */