src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2016  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 #include <locale.h>
  78 #include <langinfo.h>
  79
  80 #if USE_NCURSES
  81 # define NCURSES_OPAQUE 1
  82 /* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */
  83 # define _X_OPEN_SOURCE_EXTENDED
  84
  85 # if HAVE_NCURSESW_NCURSES_H
  86 #  include <ncursesw/ncurses.h>
  87 # elif HAVE_NCURSES_H
  88 #  include <ncurses.h>
  89 # endif
  90
  91 # define OPING_GREEN 1
  92 # define OPING_YELLOW 2
  93 # define OPING_RED 3
  94 # define OPING_GREEN_HIST 4
  95 # define OPING_YELLOW_HIST 5
  96 # define OPING_RED_HIST 6
  97
  98 double const threshold_green = 0.8;
  99 double const threshold_yellow = 0.95;
 100
 101 static char const * const hist_symbols_utf8[] = {
 102         "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
 103 static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8)
 104         / sizeof (hist_symbols_utf8[0]);
 105
 106 /* scancodes for 6 levels of horizontal bars, ncurses-specific */
 107 /* those are not the usual constants because those are not constant */
 108 static int const hist_symbols_acs[] = {
 109         115, /* ACS_S9 "⎽" */
 110         114, /* ACS_S7 "⎼" */
 111         113, /* ACS_S5 "─" */
 112         112, /* ACS_S3 "⎻" */
 113         111  /* ACS_S1 "⎺" */
 114 };
 115 static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs)
 116         / sizeof (hist_symbols_acs[0]);
 117
 118 /* use different colors without a background for scancodes */
 119 static int const hist_colors_utf8[] = {
 120         OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST };
 121 static int const hist_colors_acs[] = {
 122         OPING_GREEN, OPING_YELLOW, OPING_RED };
 123 /* assuming that both arrays are the same size */
 124 static size_t const hist_colors_num = sizeof (hist_colors_utf8)
 125         / sizeof (hist_colors_utf8[0]);
 126 #endif
 127
 128 /* "─" */
 129 #define BOXPLOT_WHISKER_BAR       (113 | A_ALTCHARSET)
 130 /* "├" */
 131 #define BOXPLOT_WHISKER_LEFT_END  (116 | A_ALTCHARSET)
 132 /* "┤" */
 133 #define BOXPLOT_WHISKER_RIGHT_END (117 | A_ALTCHARSET)
 134 /* Inverted */
 135 #define BOXPLOT_BOX               ' '
 136 /* "│", inverted */
 137 #define BOXPLOT_MEDIAN            (120 | A_ALTCHARSET)
 138
 139 #include "oping.h"
 140
 141 #ifndef _POSIX_SAVED_IDS
 142 # define _POSIX_SAVED_IDS 0
 143 #endif
 144
 145 #ifndef IPTOS_MINCOST
 146 # define IPTOS_MINCOST 0x02
 147 #endif
 148
 149 /* Remove GNU specific __attribute__ settings when using another compiler */
 150 #if !__GNUC__
 151 # define __attribute__(x) /**/
 152 #endif
 153
 154 typedef struct ping_context
 155 {
 156         char host[NI_MAXHOST];
 157         char addr[NI_MAXHOST];
 158
 159         int index;
 160         int req_sent;
 161         int req_rcvd;
 162
 163         double latency_total;
 164
 165 #ifndef HISTORY_SIZE_MAX
 166 # define HISTORY_SIZE_MAX 900
 167 #endif
 168         /* The last n RTTs in the order they were sent. */
 169         double history_by_time[HISTORY_SIZE_MAX];
 170
 171         /* Current number of entries in the history. This is a value between 0
 172          * and HISTORY_SIZE_MAX. */
 173         size_t history_size;
 174
 175         /* Number "received" entries in the history, i.e. non-NAN entries. */
 176         size_t history_received;
 177
 178         /* Index of the next RTT to be written to history_by_time. This wraps
 179          * around to 0 once the histroty has grown to HISTORY_SIZE_MAX. */
 180         size_t history_index;
 181
 182         /* The last history_size RTTs sorted by value. timed out packets (NAN
 183          * entries) are sorted to the back. */
 184         double history_by_value[HISTORY_SIZE_MAX];
 185
 186         /* If set to true, history_by_value has to be re-calculated. */
 187         _Bool history_dirty;
 188
 189 #if USE_NCURSES
 190         WINDOW *window;
 191 #endif
 192 } ping_context_t;
 193
 194 static double  opt_interval   = 1.0;
 195 static double  opt_timeout    = PING_DEF_TIMEOUT;
 196 static int     opt_addrfamily = PING_DEF_AF;
 197 static char   *opt_srcaddr    = NULL;
 198 static char   *opt_device     = NULL;
 199 static char   *opt_mark       = NULL;
 200 static char   *opt_filename   = NULL;
 201 static int     opt_count      = -1;
 202 static int     opt_send_ttl   = 64;
 203 static uint8_t opt_send_qos   = 0;
 204 #define OPING_DEFAULT_PERCENTILE 95.0
 205 static double  opt_percentile = -1.0;
 206 static double  opt_exit_status_threshold = 1.0;
 207 #if USE_NCURSES
 208 static int     opt_show_graph = 1;
 209 static int     opt_utf8       = 0;
 210 #endif
 211 static char   *opt_outfile    = NULL;
 212 static int     opt_bell       = 0;
 213
 214 static int host_num  = 0;
 215 static FILE *outfile = NULL;
 216
 217 #if USE_NCURSES
 218 static WINDOW *main_win = NULL;
 219 #endif
 220
 221 static void sigint_handler (int signal) /* {{{ */
 222 {
 223         /* Make compiler happy */
 224         signal = 0;
 225         /* Exit the loop */
 226         opt_count = 0;
 227 } /* }}} void sigint_handler */
 228
 229 static ping_context_t *context_create (void) /* {{{ */
 230 {
 231         ping_context_t *ret;
 232
 233         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 234                 return (NULL);
 235
 236         memset (ret, '\0', sizeof (ping_context_t));
 237
 238         ret->latency_total = 0.0;
 239
 240 #if USE_NCURSES
 241         ret->window = NULL;
 242 #endif
 243
 244         return (ret);
 245 } /* }}} ping_context_t *context_create */
 246
 247 static void context_destroy (ping_context_t *context) /* {{{ */
 248 {
 249         if (context == NULL)
 250                 return;
 251
 252 #if USE_NCURSES
 253         if (context->window != NULL)
 254         {
 255                 delwin (context->window);
 256                 context->window = NULL;
 257         }
 258 #endif
 259
 260         free (context);
 261 } /* }}} void context_destroy */
 262
 263 static int compare_double (void const *arg0, void const *arg1) /* {{{ */
 264 {
 265         double dbl0 = *((double *) arg0);
 266         double dbl1 = *((double *) arg1);
 267
 268         if (isnan (dbl0))
 269         {
 270                 if (isnan (dbl1))
 271                         return 0;
 272                 else
 273                         return 1;
 274         }
 275         else if (isnan (dbl1))
 276                 return -1;
 277         else if (dbl0 < dbl1)
 278                 return -1;
 279         else if (dbl0 > dbl1)
 280                 return 1;
 281         else
 282                 return 0;
 283 } /* }}} int compare_double */
 284
 285 static void clean_history (ping_context_t *ctx) /* {{{ */
 286 {
 287         size_t i;
 288
 289         if (!ctx->history_dirty)
 290                 return;
 291
 292         /* Copy all values from by_time to by_value. */
 293         memcpy (ctx->history_by_value, ctx->history_by_time,
 294                         sizeof (ctx->history_by_time));
 295
 296         /* Remove impossible values caused by adding a new host */
 297         for (i = 0; i < ctx->history_size; i++)
 298                 if (ctx->history_by_value[i]<0)
 299                         ctx->history_by_value[i]=NAN;
 300
 301         /* Sort all RTTs. */
 302         qsort (ctx->history_by_value, ctx->history_size, sizeof
 303                         (ctx->history_by_value[0]), compare_double);
 304
 305         /* Update the number of received RTTs. */
 306         ctx->history_received = 0;
 307         for (i = 0; i < ctx->history_size; i++)
 308                 if (!isnan (ctx->history_by_value[i]))
 309                         ctx->history_received++;
 310
 311         /* Mark as clean. */
 312         ctx->history_dirty = 0;
 313 } /* }}} void clean_history */
 314
 315 static double percentile_to_latency (ping_context_t *ctx, /* {{{ */
 316                 double percentile)
 317 {
 318         size_t index;
 319
 320         clean_history (ctx);
 321
 322         /* Not a single packet was received successfully. */
 323         if (ctx->history_received == 0)
 324                 return NAN;
 325
 326         if (percentile <= 0.0)
 327                 index = 0;
 328         else if (percentile >= 100.0)
 329                 index = ctx->history_received - 1;
 330         else
 331         {
 332                 index = (size_t) ceil ((percentile / 100.0) * ((double) ctx->history_received));
 333                 assert (index > 0);
 334                 index--;
 335         }
 336
 337         return (ctx->history_by_value[index]);
 338 } /* }}} double percentile_to_latency */
 339
 340 #if USE_NCURSES
 341 static double latency_to_ratio (ping_context_t *ctx, /* {{{ */
 342                 double latency)
 343 {
 344         size_t low;
 345         size_t high;
 346         size_t index;
 347
 348         clean_history (ctx);
 349
 350         /* Not a single packet was received successfully. */
 351         if (ctx->history_received == 0)
 352                 return NAN;
 353
 354         low = 0;
 355         high = ctx->history_received - 1;
 356
 357         if (latency < ctx->history_by_value[low])
 358                 return 0.0;
 359         else if (latency >= ctx->history_by_value[high])
 360                 return 100.0;
 361
 362         /* Do a binary search for the latency. This will work even when the
 363          * exact latency is not in the array. If the latency is in the array
 364          * multiple times, "low" will be set to the index of the last
 365          * occurrence. The value at index "high" will be larger than the
 366          * searched for latency (assured by the above "if" block. */
 367         while ((high - low) > 1)
 368         {
 369                 index = (high + low) / 2;
 370
 371                 if (ctx->history_by_value[index] > latency)
 372                         high = index;
 373                 else
 374                         low = index;
 375         }
 376
 377         assert (ctx->history_by_value[high] > latency);
 378         assert (ctx->history_by_value[low] <= latency);
 379
 380         if (ctx->history_by_value[low] == latency)
 381                 index = low;
 382         else
 383                 index = high;
 384
 385         return (((double) (index + 1)) / ((double) ctx->history_received));
 386 } /* }}} double latency_to_ratio */
 387 #endif
 388
 389 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 390 {
 391         if (ctx == NULL)
 392                 return (-1.0);
 393
 394         if (ctx->req_sent < 1)
 395                 return (0.0);
 396
 397         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 398                         / ((double) ctx->req_sent));
 399 } /* }}} double context_get_packet_loss */
 400
 401 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 402 {
 403         pingobj_iter_t *iter;
 404         int index;
 405         size_t history_size = 0;
 406
 407         if (ping == NULL)
 408                 return (EINVAL);
 409
 410         index = 0;
 411         for (iter = ping_iterator_get (ping);
 412                         iter != NULL;
 413                         iter = ping_iterator_next (iter))
 414         {
 415                 ping_context_t *context;
 416                 size_t buffer_size;
 417
 418                 context = ping_iterator_get_context(iter);
 419
 420                 /* if this is a previously existing host, do not recreate it */
 421                 if (context != NULL) {
 422                     history_size = context->history_size;
 423                     context->index = index++;
 424                     continue;
 425                 }
 426
 427                 context = context_create ();
 428                 context->index = index;
 429
 430                 /* start new hosts at the same graph point as old hosts */
 431                 context->history_size = history_size;
 432                 context->history_index = history_size;
 433                 for (int i = 0; i<history_size; i++) {
 434                     context->history_by_time[i] = -1;
 435                 }
 436
 437                 buffer_size = sizeof (context->host);
 438                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 439
 440                 buffer_size = sizeof (context->addr);
 441                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 442
 443                 ping_iterator_set_context (iter, (void *) context);
 444
 445                 index++;
 446         }
 447
 448         return (0);
 449 } /* }}} int ping_initialize_contexts */
 450
 451 static void usage_exit (const char *name, int status) /* {{{ */
 452 {
 453         fprintf (stderr, "Usage: %s [OPTIONS] "
 454                                 "-f filename | host [host [host ...]]\n"
 455
 456                         "\nAvailable options:\n"
 457                         "  -4|-6        force the use of IPv4 or IPv6\n"
 458                         "  -c count     number of ICMP packets to send\n"
 459                         "  -i interval  interval with which to send ICMP packets\n"
 460                         "  -w timeout   time to wait for replies, in seconds\n"
 461                         "  -t ttl       time to live for each ICMP packet\n"
 462                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 463                         "               Use \"-Q help\" for a list of valid options.\n"
 464                         "  -I srcaddr   source address\n"
 465                         "  -D device    outgoing interface name\n"
 466                         "  -m mark      mark to set on outgoing packets\n"
 467                         "  -f filename  read hosts from <filename>\n"
 468                         "  -O filename  write RTT measurements to <filename>\n"
 469 #if USE_NCURSES
 470                         "  -u / -U      force / disable UTF-8 output\n"
 471                         "  -g graph     graph type to draw\n"
 472 #endif
 473                         "  -P percent   Report the n'th percentile of latency\n"
 474                         "  -Z percent   Exit with non-zero exit status if more than this percentage of\n"
 475                         "               probes timed out. (default: never)\n"
 476
 477                         "\noping "PACKAGE_VERSION", http://noping.cc/\n"
 478                         "by Florian octo Forster <ff@octo.it>\n"
 479                         "for contributions see `AUTHORS'\n",
 480                         name);
 481         exit (status);
 482 } /* }}} void usage_exit */
 483
 484 __attribute__((noreturn))
 485 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 486 {
 487         if (arg != 0)
 488                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 489
 490         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 491                         "\n"
 492                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 493                         "\n"
 494                         "    be                     Best Effort (BE, default PHB).\n"
 495                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 496                         "                           (low delay, low loss, low jitter)\n"
 497                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 498                         "                           (capacity-admitted traffic)\n"
 499                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 500                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 501                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 502                         "                           For example: \"cs1\" (priority traffic)\n"
 503                         "\n"
 504                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 505                         "\n"
 506                         "    lowdelay     (%#04x)    minimize delay\n"
 507                         "    throughput   (%#04x)    maximize throughput\n"
 508                         "    reliability  (%#04x)    maximize reliability\n"
 509                         "    mincost      (%#04x)    minimize monetary cost\n"
 510                         "\n"
 511                         "  Specify manually\n"
 512                         "\n"
 513                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 514                         "       0 -  255            Decimal numeric specification.\n"
 515                         "\n",
 516                         (unsigned int) IPTOS_LOWDELAY,
 517                         (unsigned int) IPTOS_THROUGHPUT,
 518                         (unsigned int) IPTOS_RELIABILITY,
 519                         (unsigned int) IPTOS_MINCOST);
 520
 521         exit (status);
 522 } /* }}} void usage_qos_exit */
 523
 524 static int set_opt_send_qos (const char *opt) /* {{{ */
 525 {
 526         if (opt == NULL)
 527                 return (EINVAL);
 528
 529         if (strcasecmp ("help", opt) == 0)
 530                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 531         /* DiffServ (RFC 2474): */
 532         /* - Best effort (BE) */
 533         else if (strcasecmp ("be", opt) == 0)
 534                 opt_send_qos = 0;
 535         /* - Expedited Forwarding (EF, RFC 3246) */
 536         else if (strcasecmp ("ef", opt) == 0)
 537                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 538         /* - Voice Admit (VA, RFC 5865) */
 539         else if (strcasecmp ("va", opt) == 0)
 540                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 541         /* - Assured Forwarding (AF, RFC 2597) */
 542         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 543                         && (strlen (opt) == 4))
 544         {
 545                 uint8_t dscp;
 546                 uint8_t class = 0;
 547                 uint8_t prec = 0;
 548
 549                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 550                 if (opt[2] == '1')
 551                         class = 1;
 552                 else if (opt[2] == '2')
 553                         class = 2;
 554                 else if (opt[2] == '3')
 555                         class = 3;
 556                 else if (opt[2] == '4')
 557                         class = 4;
 558                 else
 559                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 560
 561                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 562                 if (opt[3] == '1')
 563                         prec = 1;
 564                 else if (opt[3] == '2')
 565                         prec = 2;
 566                 else if (opt[3] == '3')
 567                         prec = 3;
 568                 else
 569                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 570
 571                 dscp = (8 * class) + (2 * prec);
 572                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 573                 opt_send_qos = dscp << 2;
 574         }
 575         /* - Class Selector (CS) */
 576         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 577                         && (strlen (opt) == 3))
 578         {
 579                 uint8_t class;
 580
 581                 if ((opt[2] < '0') || (opt[2] > '7'))
 582                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 583
 584                 /* Not exactly legal by the C standard, but I don't know of any
 585                  * system not supporting this hack. */
 586                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 587                 opt_send_qos = class << 5;
 588         }
 589         /* Type of Service (RFC 1349) */
 590         else if (strcasecmp ("lowdelay", opt) == 0)
 591                 opt_send_qos = IPTOS_LOWDELAY;
 592         else if (strcasecmp ("throughput", opt) == 0)
 593                 opt_send_qos = IPTOS_THROUGHPUT;
 594         else if (strcasecmp ("reliability", opt) == 0)
 595                 opt_send_qos = IPTOS_RELIABILITY;
 596         else if (strcasecmp ("mincost", opt) == 0)
 597                 opt_send_qos = IPTOS_MINCOST;
 598         /* Numeric value */
 599         else
 600         {
 601                 unsigned long value;
 602                 char *endptr;
 603
 604                 errno = 0;
 605                 endptr = NULL;
 606                 value = strtoul (opt, &endptr, /* base = */ 0);
 607                 if ((errno != 0) || (endptr == opt)
 608                                 || (endptr == NULL) || (*endptr != 0)
 609                                 || (value > 0xff))
 610                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 611
 612                 opt_send_qos = (uint8_t) value;
 613         }
 614
 615         return (0);
 616 } /* }}} int set_opt_send_qos */
 617
 618 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 619 {
 620         uint8_t dscp;
 621         uint8_t ecn;
 622         char *dscp_str;
 623         char *ecn_str;
 624
 625         dscp = qos >> 2;
 626         ecn = qos & 0x03;
 627
 628         switch (dscp)
 629         {
 630                 case 0x00: dscp_str = "be";  break;
 631                 case 0x2e: dscp_str = "ef";  break;
 632                 case 0x2d: dscp_str = "va";  break;
 633                 case 0x0a: dscp_str = "af11"; break;
 634                 case 0x0c: dscp_str = "af12"; break;
 635                 case 0x0e: dscp_str = "af13"; break;
 636                 case 0x12: dscp_str = "af21"; break;
 637                 case 0x14: dscp_str = "af22"; break;
 638                 case 0x16: dscp_str = "af23"; break;
 639                 case 0x1a: dscp_str = "af31"; break;
 640                 case 0x1c: dscp_str = "af32"; break;
 641                 case 0x1e: dscp_str = "af33"; break;
 642                 case 0x22: dscp_str = "af41"; break;
 643                 case 0x24: dscp_str = "af42"; break;
 644                 case 0x26: dscp_str = "af43"; break;
 645                 case 0x08: dscp_str = "cs1";  break;
 646                 case 0x10: dscp_str = "cs2";  break;
 647                 case 0x18: dscp_str = "cs3";  break;
 648                 case 0x20: dscp_str = "cs4";  break;
 649                 case 0x28: dscp_str = "cs5";  break;
 650                 case 0x30: dscp_str = "cs6";  break;
 651                 case 0x38: dscp_str = "cs7";  break;
 652                 default:   dscp_str = NULL;
 653         }
 654
 655         switch (ecn)
 656         {
 657                 case 0x01: ecn_str = ",ecn(1)"; break;
 658                 case 0x02: ecn_str = ",ecn(0)"; break;
 659                 case 0x03: ecn_str = ",ce"; break;
 660                 default:   ecn_str = "";
 661         }
 662
 663         if (dscp_str == NULL)
 664                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 665         else
 666                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 667         buffer[buffer_size - 1] = 0;
 668
 669         return (buffer);
 670 } /* }}} char *format_qos */
 671
 672 static int read_options (int argc, char **argv) /* {{{ */
 673 {
 674         int optchar;
 675
 676         while (1)
 677         {
 678                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:O:P:m:w:b"
 679 #if USE_NCURSES
 680                                 "uUg:"
 681 #endif
 682                                 );
 683
 684                 if (optchar == -1)
 685                         break;
 686
 687                 switch (optchar)
 688                 {
 689                         case '4':
 690                         case '6':
 691                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 692                                 break;
 693
 694                         case 'c':
 695                                 {
 696                                         int new_count;
 697                                         new_count = atoi (optarg);
 698                                         if (new_count > 0)
 699                                         {
 700                                                 opt_count = new_count;
 701
 702                                                 if ((opt_percentile < 0.0) && (opt_count < 20))
 703                                                         opt_percentile = 100.0 * (opt_count - 1) / opt_count;
 704                                         }
 705                                         else
 706                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 707                                                                 optarg);
 708                                 }
 709                                 break;
 710
 711                         case 'f':
 712                                 {
 713                                         if (opt_filename != NULL)
 714                                                 free (opt_filename);
 715                                         opt_filename = strdup (optarg);
 716                                 }
 717                                 break;
 718
 719                         case 'i':
 720                                 {
 721                                         double new_interval;
 722                                         new_interval = atof (optarg);
 723                                         if (new_interval < 0.001)
 724                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 725                                                                 optarg);
 726                                         else
 727                                                 opt_interval = new_interval;
 728                                 }
 729                                 break;
 730
 731                         case 'w':
 732                                 {
 733                                         char *endp = NULL;
 734                                         double t = strtod (optarg, &endp);
 735                                         if ((optarg[0] != 0) && (endp != NULL) && (*endp == 0))
 736                                                 opt_timeout = t;
 737                                         else
 738                                                 fprintf (stderr, "Ignoring invalid timeout: %s\n",
 739                                                                 optarg);
 740                                 }
 741                                 break;
 742
 743                         case 'I':
 744                                 {
 745                                         if (opt_srcaddr != NULL)
 746                                                 free (opt_srcaddr);
 747                                         opt_srcaddr = strdup (optarg);
 748                                 }
 749                                 break;
 750
 751                         case 'D':
 752                                 opt_device = optarg;
 753                                 break;
 754
 755                         case 'm':
 756                                 opt_mark = optarg;
 757                                 break;
 758
 759                         case 't':
 760                         {
 761                                 int new_send_ttl;
 762                                 new_send_ttl = atoi (optarg);
 763                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 764                                         opt_send_ttl = new_send_ttl;
 765                                 else
 766                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 767                                                         optarg);
 768                                 break;
 769                         }
 770
 771                         case 'Q':
 772                                 set_opt_send_qos (optarg);
 773                                 break;
 774
 775                         case 'O':
 776                                 {
 777                                         free (opt_outfile);
 778                                         opt_outfile = strdup (optarg);
 779                                 }
 780                                 break;
 781
 782                         case 'P':
 783                                 {
 784                                         double new_percentile;
 785                                         new_percentile = atof (optarg);
 786                                         if (isnan (new_percentile)
 787                                                         || (new_percentile < 0.1)
 788                                                         || (new_percentile > 100.0))
 789                                                 fprintf (stderr, "Ignoring invalid percentile: %s\n",
 790                                                                 optarg);
 791                                         else
 792                                                 opt_percentile = new_percentile;
 793                                 }
 794                                 break;
 795
 796 #if USE_NCURSES
 797                         case 'g':
 798                                 if (strcasecmp ("none", optarg) == 0)
 799                                         opt_show_graph = 0;
 800                                 else if (strcasecmp ("prettyping", optarg) == 0)
 801                                         opt_show_graph = 1;
 802                                 else if (strcasecmp ("histogram", optarg) == 0)
 803                                         opt_show_graph = 2;
 804                                 else if (strcasecmp ("boxplot", optarg) == 0)
 805                                         opt_show_graph = 3;
 806                                 else
 807                                         fprintf (stderr, "Unknown graph option: %s\n", optarg);
 808                                 break;
 809
 810                         case 'u':
 811                                 opt_utf8 = 2;
 812                                 break;
 813                         case 'U':
 814                                 opt_utf8 = 1;
 815                                 break;
 816 #endif
 817                         case 'b':
 818                                 opt_bell = 1;
 819                                 break;
 820
 821                         case 'Z':
 822                         {
 823                                 char *endptr = NULL;
 824                                 double tmp;
 825
 826                                 errno = 0;
 827                                 tmp = strtod (optarg, &endptr);
 828                                 if ((errno != 0) || (endptr == NULL) || (*endptr != 0) || (tmp < 0.0) || (tmp > 100.0))
 829                                 {
 830                                         fprintf (stderr, "Ignoring invalid -Z argument: %s\n", optarg);
 831                                         fprintf (stderr, "The \"-Z\" option requires a numeric argument between 0 and 100.\n");
 832                                 }
 833                                 else
 834                                         opt_exit_status_threshold = tmp / 100.0;
 835
 836                                 break;
 837                         }
 838
 839                         case 'h':
 840                                 usage_exit (argv[0], 0);
 841                                 break;
 842
 843                         default:
 844                                 usage_exit (argv[0], 1);
 845                 }
 846         }
 847
 848         if (opt_percentile <= 0.0)
 849                 opt_percentile = OPING_DEFAULT_PERCENTILE;
 850
 851         return (optind);
 852 } /* }}} read_options */
 853
 854 static void time_normalize (struct timespec *ts) /* {{{ */
 855 {
 856         while (ts->tv_nsec < 0)
 857         {
 858                 if (ts->tv_sec == 0)
 859                 {
 860                         ts->tv_nsec = 0;
 861                         return;
 862                 }
 863
 864                 ts->tv_sec  -= 1;
 865                 ts->tv_nsec += 1000000000;
 866         }
 867
 868         while (ts->tv_nsec >= 1000000000)
 869         {
 870                 ts->tv_sec  += 1;
 871                 ts->tv_nsec -= 1000000000;
 872         }
 873 } /* }}} void time_normalize */
 874
 875 static void time_calc (struct timespec *ts_dest, /* {{{ */
 876                 const struct timespec *ts_int,
 877                 const struct timeval  *tv_begin,
 878                 const struct timeval  *tv_end)
 879 {
 880         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 881         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 882         time_normalize (ts_dest);
 883
 884         /* Assure that `(begin + interval) > end'.
 885          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 886          * which may be `unsigned. *sigh* */
 887         if ((tv_end->tv_sec > ts_dest->tv_sec)
 888                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 889                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 890         {
 891                 ts_dest->tv_sec  = 0;
 892                 ts_dest->tv_nsec = 0;
 893                 return;
 894         }
 895
 896         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 897         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 898         time_normalize (ts_dest);
 899 } /* }}} void time_calc */
 900
 901 #if USE_NCURSES
 902 static _Bool has_utf8() /* {{{ */
 903 {
 904 # if HAVE_NCURSESW_NCURSES_H
 905         if (!opt_utf8)
 906         {
 907                 /* Automatically determine */
 908                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 909                         opt_utf8 = 2;
 910                 else
 911                         opt_utf8 = 1;
 912         }
 913         return ((_Bool) (opt_utf8 - 1));
 914 # else
 915         return (0);
 916 # endif
 917 } /* }}} _Bool has_utf8 */
 918
 919 static int update_graph_boxplot (ping_context_t *ctx) /* {{{ */
 920 {
 921         uint32_t *counters;
 922         double *ratios;
 923         size_t i;
 924         size_t x_max;
 925         size_t x;
 926
 927         clean_history (ctx);
 928
 929         if (ctx->history_received == 0)
 930                 return (ENOENT);
 931
 932         x_max = (size_t) getmaxx (ctx->window);
 933         if (x_max <= 8)
 934                 return (EINVAL);
 935         x_max -= 4;
 936
 937         counters = calloc (x_max, sizeof (*counters));
 938         ratios = calloc (x_max, sizeof (*ratios));
 939
 940         /* Bucketize */
 941         for (i = 0; i < ctx->history_received; i++)
 942         {
 943                 double latency = ctx->history_by_value[i] / 1000.0;
 944                 size_t index = (size_t) (((double) x_max) * latency / opt_interval);
 945
 946                 if (index >= x_max)
 947                         index = x_max - 1;
 948
 949                 counters[index]++;
 950         }
 951
 952         /* Sum and calc ratios */
 953         ratios[0] = ((double) counters[0]) / ((double) ctx->history_received);
 954         for (x = 1; x < x_max; x++)
 955         {
 956                 counters[x] += counters[x - 1];
 957                 ratios[x] = ((double) counters[x]) / ((double) ctx->history_received);
 958         }
 959
 960         for (x = 0; x < x_max; x++)
 961         {
 962                 int symbol = ' ';
 963                 _Bool reverse = 0;
 964
 965                 if (x == 0)
 966                 {
 967                         if (ratios[x] >= 0.5)
 968                         {
 969                                 symbol = BOXPLOT_MEDIAN;
 970                                 reverse = 1;
 971                         }
 972                         else if (ratios[x] > 0.25)
 973                         {
 974                                 symbol = BOXPLOT_BOX;
 975                                 reverse = 1;
 976                         }
 977                         else if (ratios[x] > 0.025)
 978                                 symbol = BOXPLOT_WHISKER_BAR;
 979                         else
 980                                 symbol = ' '; /* NOP */
 981                 }
 982                 else /* (x != 0) */
 983                 {
 984                         if ((ratios[x - 1] < 0.5) && (ratios[x] >= 0.5))
 985                         {
 986                                 symbol = BOXPLOT_MEDIAN;
 987                                 reverse = 1;
 988                         }
 989                         else if (((ratios[x] >= 0.25) && (ratios[x] <= 0.75))
 990                                         || ((ratios[x - 1] < 0.75) && (ratios[x] > 0.75)))
 991                         {
 992                                 symbol = BOXPLOT_BOX;
 993                                 reverse = 1;
 994                         }
 995                         else if ((ratios[x] < 0.5) && (ratios[x] >= 0.025))
 996                         {
 997                                 if (ratios[x - 1] < 0.025)
 998                                         symbol = BOXPLOT_WHISKER_LEFT_END;
 999                                 else
1000                                         symbol = BOXPLOT_WHISKER_BAR;
1001                         }
1002                         else if ((ratios[x] > .5) && (ratios[x] < 0.975))
1003                         {
1004                                 symbol = BOXPLOT_WHISKER_BAR;
1005                         }
1006                         else if ((ratios[x] >= 0.975) && (ratios[x - 1] < 0.975))
1007                                 symbol = BOXPLOT_WHISKER_RIGHT_END;
1008                 }
1009
1010                 if (reverse)
1011                         wattron (ctx->window, A_REVERSE);
1012                 mvwaddch (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
1013                 // mvwprintw (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
1014                 if (reverse)
1015                         wattroff (ctx->window, A_REVERSE);
1016         }
1017
1018         free (counters);
1019         free (ratios);
1020         return (0);
1021 } /* }}} int update_graph_boxplot */
1022
1023 static int update_graph_prettyping (ping_context_t *ctx, /* {{{ */
1024                 double latency)
1025 {
1026         size_t x;
1027         size_t x_max;
1028         size_t history_offset;
1029
1030         x_max = (size_t) getmaxx (ctx->window);
1031         if (x_max <= 4)
1032                 return (EINVAL);
1033         x_max -= 4;
1034
1035         /* Determine the first index in the history we need to draw
1036          * the graph. */
1037         history_offset = 0;
1038         if (((size_t) x_max) < ctx->history_size) /* window is smaller than history */
1039         {
1040                 if (ctx->history_index > x_max)
1041                         history_offset = ctx->history_index - x_max;
1042                 else /* wrap around */
1043                         history_offset = ctx->history_index + ctx->history_size - x_max;
1044         }
1045         else /* window is larger than history */
1046         {
1047                 if (ctx->history_index != ctx->history_size) /* no longer growing. */
1048                         history_offset = ctx->history_index;
1049                 else /* start-up */
1050                         history_offset = 0;
1051         }
1052
1053         for (x = 0; x < x_max; x++)
1054         {
1055                 size_t index;
1056                 double latency;
1057
1058                 int color = OPING_RED;
1059                 char const *symbol = "!";
1060                 int symbolc = '!';
1061
1062                 if (x >= ctx->history_size)
1063                 {
1064                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
1065                         continue;
1066                 }
1067
1068                 index = (history_offset + x) % ctx->history_size;
1069                 latency = ctx->history_by_time[index];
1070
1071                 if (latency < 0) {
1072                         continue;
1073                 }
1074
1075                 if (latency >= 0.0)
1076                 {
1077                         double ratio;
1078
1079                         size_t symbols_num = hist_symbols_acs_num;
1080                         size_t colors_num = 1;
1081
1082                         size_t index_symbols;
1083                         size_t index_colors;
1084                         size_t intensity;
1085
1086                         /* latency is in milliseconds, opt_interval is in seconds. */
1087                         ratio = (latency * 0.001) / opt_interval;
1088                         if (ratio > 1) {
1089                                 ratio = 1.0;
1090                         }
1091
1092                         if (has_utf8 ())
1093                                 symbols_num = hist_symbols_utf8_num;
1094
1095                         if (has_colors () == TRUE)
1096                                 colors_num = hist_colors_num;
1097
1098                         intensity = (size_t) (ratio * ((double) (symbols_num * colors_num)));
1099                         if (intensity >= (symbols_num * colors_num))
1100                                 intensity = (symbols_num * colors_num) - 1;
1101
1102                         index_symbols = intensity % symbols_num;
1103                         assert (index_symbols < symbols_num);
1104
1105                         index_colors = intensity / symbols_num;
1106                         assert (index_colors < colors_num);
1107
1108                         if (has_utf8())
1109                         {
1110                                 color = hist_colors_utf8[index_colors];
1111                                 symbol = hist_symbols_utf8[index_symbols];
1112                         }
1113                         else
1114                         {
1115                                 color = hist_colors_acs[index_colors];
1116                                 symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
1117                         }
1118                 }
1119                 else /* if (!(latency >= 0.0)) */
1120                         wattron (ctx->window, A_BOLD);
1121
1122                 if (has_colors () == TRUE)
1123                         wattron (ctx->window, COLOR_PAIR(color));
1124
1125                 if (has_utf8())
1126                         mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, symbol);
1127                 else
1128                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, symbolc);
1129
1130                 if (has_colors () == TRUE)
1131                         wattroff (ctx->window, COLOR_PAIR(color));
1132
1133                 /* Use negation here to handle NaN correctly. */
1134                 if (!(latency >= 0.0))
1135                         wattroff (ctx->window, A_BOLD);
1136         } /* for (x) */
1137
1138         return (0);
1139 } /* }}} int update_graph_prettyping */
1140
1141 static int update_graph_histogram (ping_context_t *ctx) /* {{{ */
1142 {
1143         uint32_t *counters;
1144         uint32_t *accumulated;
1145         uint32_t max;
1146         size_t i;
1147         size_t x_max;
1148         size_t x;
1149
1150         size_t symbols_num = hist_symbols_acs_num;
1151
1152         clean_history (ctx);
1153
1154         if (ctx->history_received == 0)
1155                 return (ENOENT);
1156
1157         if (has_utf8 ())
1158                 symbols_num = hist_symbols_utf8_num;
1159
1160         x_max = (size_t) getmaxx (ctx->window);
1161         if (x_max <= 4)
1162                 return (EINVAL);
1163         x_max -= 4;
1164
1165         counters = calloc (x_max, sizeof (*counters));
1166         accumulated = calloc (x_max, sizeof (*accumulated));
1167
1168         /* Bucketize */
1169         max = 0;
1170         for (i = 0; i < ctx->history_received; i++)
1171         {
1172                 double latency = ctx->history_by_value[i] / 1000.0;
1173                 size_t index = (size_t) (((double) x_max) * latency / opt_interval);
1174
1175                 if (index >= x_max)
1176                         index = x_max - 1;
1177
1178                 counters[index]++;
1179                 if (max < counters[index])
1180                         max = counters[index];
1181         }
1182
1183         /* Sum */
1184         accumulated[0] = counters[0];
1185         for (x = 1; x < x_max; x++)
1186                 accumulated[x] = counters[x] + accumulated[x - 1];
1187
1188         /* Calculate ratios */
1189         for (x = 0; x < x_max; x++)
1190         {
1191                 double height = ((double) counters[x]) / ((double) max);
1192                 double ratio_this = ((double) accumulated[x]) / ((double) ctx->history_received);
1193                 double ratio_prev = 0.0;
1194                 size_t index;
1195                 int color = 0;
1196
1197                 index = (size_t) (height * ((double) symbols_num));
1198                 if (index >= symbols_num)
1199                         index = symbols_num - 1;
1200
1201                 if (x > 0)
1202                         ratio_prev = ((double) accumulated[x - 1]) / ((double) ctx->history_received);
1203
1204                 if (has_colors () == TRUE)
1205                 {
1206                         if ((ratio_this <= threshold_green)
1207                                         || ((ratio_prev < threshold_green)
1208                                                 && (ratio_this > threshold_green)))
1209                                 color = OPING_GREEN;
1210                         else if ((ratio_this <= threshold_yellow)
1211                                         || ((ratio_prev < threshold_yellow)
1212                                                 && (ratio_this > threshold_yellow)))
1213                                 color = OPING_YELLOW;
1214                         else
1215                                 color = OPING_RED;
1216
1217                         wattron (ctx->window, COLOR_PAIR(color));
1218                 }
1219
1220                 if (counters[x] == 0)
1221                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
1222                 else if (has_utf8 ())
1223                         mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2,
1224                                         hist_symbols_utf8[index]);
1225                 else
1226                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2,
1227                                         hist_symbols_acs[index] | A_ALTCHARSET);
1228
1229                 if (has_colors () == TRUE)
1230                         wattroff (ctx->window, COLOR_PAIR(color));
1231
1232         }
1233
1234         free (accumulated);
1235         return (0);
1236 } /* }}} int update_graph_histogram */
1237
1238 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
1239 {
1240         double latency = -1.0;
1241         size_t buffer_len = sizeof (latency);
1242
1243         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1244                         &latency, &buffer_len);
1245
1246         if ((ctx == NULL) || (ctx->window == NULL))
1247                 return (EINVAL);
1248
1249         /* werase (ctx->window); */
1250
1251         box (ctx->window, 0, 0);
1252         wattron (ctx->window, A_BOLD);
1253         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
1254                         " %s ", ctx->host);
1255         wattroff (ctx->window, A_BOLD);
1256         wprintw (ctx->window, "ping statistics ");
1257         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
1258                         "%i packets transmitted, %i received, %.2f%% packet "
1259                         "loss, time %.1fms",
1260                         ctx->req_sent, ctx->req_rcvd,
1261                         context_get_packet_loss (ctx),
1262                         ctx->latency_total);
1263         if (ctx->req_rcvd != 0)
1264         {
1265                 double min;
1266                 double median;
1267                 double max;
1268                 double percentile;
1269
1270                 min = percentile_to_latency (ctx, 0.0);
1271                 median = percentile_to_latency (ctx, 50.0);
1272                 max = percentile_to_latency (ctx, 100.0);
1273                 percentile = percentile_to_latency (ctx, opt_percentile);
1274
1275                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
1276                                 "RTT[ms]: min = %.0f, median = %.0f, p(%.0f) = %.0f, max = %.0f  ",
1277                                 min, median, opt_percentile, percentile, max);
1278         }
1279
1280         if (opt_show_graph == 1)
1281                 update_graph_prettyping (ctx, latency);
1282         else if (opt_show_graph == 2)
1283                 update_graph_histogram (ctx);
1284         else if (opt_show_graph == 3)
1285                 update_graph_boxplot (ctx);
1286
1287         wrefresh (ctx->window);
1288
1289         return (0);
1290 } /* }}} int update_stats_from_context */
1291
1292 static int on_resize (pingobj_t *ping) /* {{{ */
1293 {
1294         pingobj_iter_t *iter;
1295         int width = 0;
1296         int height = 0;
1297         int main_win_height;
1298         int box_height = (opt_show_graph == 0) ? 4 : 5;
1299
1300         getmaxyx (stdscr, height, width);
1301         if ((height < 1) || (width < 1))
1302                 return (EINVAL);
1303
1304         main_win_height = height - (box_height * host_num);
1305         wresize (main_win, main_win_height, /* width = */ width);
1306         /* Allow scrolling */
1307         scrollok (main_win, TRUE);
1308         /* wsetscrreg (main_win, 0, main_win_height - 1); */
1309         /* Allow hardware accelerated scrolling. */
1310         idlok (main_win, TRUE);
1311         wrefresh (main_win);
1312
1313         for (iter = ping_iterator_get (ping);
1314                         iter != NULL;
1315                         iter = ping_iterator_next (iter))
1316         {
1317                 ping_context_t *context;
1318
1319                 context = ping_iterator_get_context (iter);
1320                 if (context == NULL)
1321                         continue;
1322
1323                 if (context->window != NULL)
1324                 {
1325                         delwin (context->window);
1326                         context->window = NULL;
1327                 }
1328                 context->window = newwin (/* height = */ box_height,
1329                                 /* width = */ width,
1330                                 /* y = */ main_win_height + (box_height * context->index),
1331                                 /* x = */ 0);
1332         }
1333
1334         return (0);
1335 } /* }}} */
1336
1337 static int check_resize (pingobj_t *ping) /* {{{ */
1338 {
1339         int need_resize = 0;
1340
1341         while (42)
1342         {
1343                 int key = wgetch (stdscr);
1344                 if (key == ERR)
1345                         break;
1346                 else if (key == KEY_RESIZE)
1347                         need_resize = 1;
1348                 else if (key == 'g')
1349                 {
1350                         if (opt_show_graph == 3)
1351                                 opt_show_graph = 1;
1352                         else if (opt_show_graph > 0)
1353                                 opt_show_graph++;
1354                 }
1355                 else if (key == 'a')
1356                 {
1357                         char host[80];
1358
1359                         wprintw(main_win, "New Host: ");
1360                         echo();
1361                         wgetnstr(main_win, host, sizeof(host));
1362                         noecho();
1363
1364                         if (ping_host_add(ping, host) < 0)
1365                         {
1366                                 const char *errmsg = ping_get_error (ping);
1367
1368                                 wprintw (main_win, "Adding host `%s' failed: %s\n", host, errmsg);
1369                         }
1370                         else
1371                         {
1372                                 int box_height = (opt_show_graph == 0) ? 4 : 5;
1373
1374                                 /* make sure old data is still visible */
1375                                 for (int i = 0; i<box_height; i++)
1376                                     wprintw (main_win, "\n");
1377
1378                                 need_resize = 1;
1379                                 host_num++;
1380                                 ping_initialize_contexts(ping);
1381                         }
1382                 }
1383         }
1384
1385         if (need_resize)
1386                 return (on_resize (ping));
1387         else
1388                 return (0);
1389 } /* }}} int check_resize */
1390
1391 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
1392 {
1393         pingobj_iter_t *iter;
1394         int width = 0;
1395         int height = 0;
1396         int main_win_height;
1397         int box_height = (opt_show_graph == 0) ? 4 : 5;
1398
1399         initscr ();
1400         cbreak ();
1401         noecho ();
1402         nodelay (stdscr, TRUE);
1403
1404         getmaxyx (stdscr, height, width);
1405         if ((height < 1) || (width < 1))
1406                 return (EINVAL);
1407
1408         if (has_colors () == TRUE)
1409         {
1410                 start_color ();
1411                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
1412                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
1413                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
1414                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
1415                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
1416                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
1417         }
1418
1419         main_win_height = height - (box_height * host_num);
1420         main_win = newwin (/* height = */ main_win_height,
1421                         /* width = */ width,
1422                         /* y = */ 0, /* x = */ 0);
1423         /* Allow scrolling */
1424         scrollok (main_win, TRUE);
1425         /* wsetscrreg (main_win, 0, main_win_height - 1); */
1426         /* Allow hardware accelerated scrolling. */
1427         idlok (main_win, TRUE);
1428         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
1429         wrefresh (main_win);
1430
1431         for (iter = ping_iterator_get (ping);
1432                         iter != NULL;
1433                         iter = ping_iterator_next (iter))
1434         {
1435                 ping_context_t *context;
1436
1437                 context = ping_iterator_get_context (iter);
1438                 if (context == NULL)
1439                         continue;
1440
1441                 if (context->window != NULL)
1442                 {
1443                         delwin (context->window);
1444                         context->window = NULL;
1445                 }
1446                 context->window = newwin (/* height = */ box_height,
1447                                 /* width = */ width,
1448                                 /* y = */ main_win_height + (box_height * context->index),
1449                                 /* x = */ 0);
1450         }
1451
1452
1453         /* Don't know what good this does exactly, but without this code
1454          * "check_resize" will be called right after startup and *somehow*
1455          * this leads to display errors. If we purge all initial characters
1456          * here, the problem goes away. "wgetch" is non-blocking due to
1457          * "nodelay" (see above). */
1458         while (wgetch (stdscr) != ERR)
1459         {
1460                 /* eat up characters */;
1461         }
1462
1463         return (0);
1464 } /* }}} int pre_loop_hook */
1465
1466 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
1467 {
1468         return (check_resize (ping));
1469 } /* }}} int pre_sleep_hook */
1470
1471 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
1472 {
1473         return (check_resize (ping));
1474 } /* }}} int pre_sleep_hook */
1475 #else /* if !USE_NCURSES */
1476 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
1477 {
1478         pingobj_iter_t *iter;
1479
1480         for (iter = ping_iterator_get (ping);
1481                         iter != NULL;
1482                         iter = ping_iterator_next (iter))
1483         {
1484                 ping_context_t *ctx;
1485                 size_t buffer_size;
1486
1487                 ctx = ping_iterator_get_context (iter);
1488                 if (ctx == NULL)
1489                         continue;
1490
1491                 buffer_size = 0;
1492                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
1493
1494                 printf ("PING %s (%s) %zu bytes of data.\n",
1495                                 ctx->host, ctx->addr, buffer_size);
1496         }
1497
1498         return (0);
1499 } /* }}} int pre_loop_hook */
1500
1501 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1502 {
1503         fflush (stdout);
1504
1505         return (0);
1506 } /* }}} int pre_sleep_hook */
1507
1508 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1509 {
1510         return (0);
1511 } /* }}} int post_sleep_hook */
1512 #endif
1513
1514 static void update_context (ping_context_t *ctx, double latency) /* {{{ */
1515 {
1516         ctx->req_sent++;
1517
1518         if (latency > 0.0)
1519         {
1520                 ctx->req_rcvd++;
1521                 ctx->latency_total += latency;
1522         }
1523         else
1524         {
1525                 latency = NAN;
1526         }
1527
1528         ctx->history_by_time[ctx->history_index] = latency;
1529
1530         ctx->history_dirty = 1;
1531
1532         /* Update index and size. */
1533         ctx->history_index = (ctx->history_index + 1) % HISTORY_SIZE_MAX;
1534         if (ctx->history_size < HISTORY_SIZE_MAX)
1535                 ctx->history_size++;
1536 } /* }}} void update_context */
1537
1538 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
1539                 __attribute__((unused)) int index)
1540 {
1541         double          latency;
1542         unsigned int    sequence;
1543         int             recv_ttl;
1544         uint8_t         recv_qos;
1545         char            recv_qos_str[16];
1546         size_t          buffer_len;
1547         size_t          data_len;
1548         ping_context_t *context;
1549
1550         latency = -1.0;
1551         buffer_len = sizeof (latency);
1552         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1553                         &latency, &buffer_len);
1554
1555         sequence = 0;
1556         buffer_len = sizeof (sequence);
1557         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
1558                         &sequence, &buffer_len);
1559
1560         recv_ttl = -1;
1561         buffer_len = sizeof (recv_ttl);
1562         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
1563                         &recv_ttl, &buffer_len);
1564
1565         recv_qos = 0;
1566         buffer_len = sizeof (recv_qos);
1567         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1568                         &recv_qos, &buffer_len);
1569
1570         data_len = 0;
1571         ping_iterator_get_info (iter, PING_INFO_DATA,
1572                         NULL, &data_len);
1573
1574         context = (ping_context_t *) ping_iterator_get_context (iter);
1575
1576 #if USE_NCURSES
1577 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1578 #else
1579 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1580 #endif
1581
1582         update_context (context, latency);
1583
1584         if (latency > 0.0)
1585         {
1586 #if USE_NCURSES
1587                 if (has_colors () == TRUE)
1588                 {
1589                         double ratio;
1590                         int color = OPING_GREEN;
1591
1592                         ratio = latency_to_ratio (context, latency);
1593                         if (ratio < threshold_green)
1594                                 color = OPING_GREEN;
1595                         else if (ratio < threshold_yellow)
1596                                 color = OPING_YELLOW;
1597                         else
1598                                 color = OPING_RED;
1599
1600                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1601                                         data_len, context->host, context->addr,
1602                                         sequence, recv_ttl,
1603                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1604                         if ((recv_qos != 0) || (opt_send_qos != 0))
1605                         {
1606                                 HOST_PRINTF ("qos=%s ",
1607                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1608                         }
1609                         HOST_PRINTF ("time=");
1610                         wattron (main_win, COLOR_PAIR(color));
1611                         HOST_PRINTF ("%.2f", latency);
1612                         wattroff (main_win, COLOR_PAIR(color));
1613                         HOST_PRINTF (" ms\n");
1614                 }
1615                 else
1616                 {
1617 #endif
1618                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1619                                 data_len,
1620                                 context->host, context->addr,
1621                                 sequence, recv_ttl);
1622                 if ((recv_qos != 0) || (opt_send_qos != 0))
1623                 {
1624                         HOST_PRINTF ("qos=%s ",
1625                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1626                 }
1627                 HOST_PRINTF ("time=%.2f ms\n", latency);
1628 #if USE_NCURSES
1629                 }
1630 #endif
1631                 if (opt_bell) {
1632 #if USE_NCURSES
1633                         beep();
1634 #else
1635                         HOST_PRINTF ("\a");
1636 #endif
1637                 }
1638         }
1639         else /* if (!(latency > 0.0)) */
1640         {
1641 #if USE_NCURSES
1642                 if (has_colors () == TRUE)
1643                 {
1644                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1645                                         context->host, context->addr,
1646                                         sequence);
1647                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1648                         HOST_PRINTF ("timeout");
1649                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1650                         HOST_PRINTF ("\n");
1651                 }
1652                 else
1653                 {
1654 #endif
1655                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1656                                 context->host, context->addr,
1657                                 sequence);
1658 #if USE_NCURSES
1659                 }
1660 #endif
1661         }
1662
1663         if (outfile != NULL)
1664         {
1665                 struct timespec ts = { 0, 0 };
1666
1667                 if (clock_gettime (CLOCK_REALTIME, &ts) == 0)
1668                 {
1669                         double t = ((double) ts.tv_sec) + (((double) ts.tv_nsec) / 1000000000.0);
1670
1671                         if ((sequence % 32) == 0)
1672                                 fprintf (outfile, "#time,host,latency[ms]\n");
1673
1674                         fprintf (outfile, "%.3f,\"%s\",%.2f\n", t, context->host, latency);
1675                 }
1676         }
1677
1678 #if USE_NCURSES
1679         update_stats_from_context (context, iter);
1680         wrefresh (main_win);
1681 #endif
1682 } /* }}} void update_host_hook */
1683
1684 /* Prints statistics for each host, cleans up the contexts and returns the
1685  * number of hosts which failed to return more than the fraction
1686  * opt_exit_status_threshold of pings. */
1687 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1688 {
1689         pingobj_iter_t *iter;
1690         int failure_count = 0;
1691
1692 #if USE_NCURSES
1693         endwin ();
1694 #endif
1695
1696         for (iter = ping_iterator_get (ping);
1697                         iter != NULL;
1698                         iter = ping_iterator_next (iter))
1699         {
1700                 ping_context_t *context;
1701
1702                 context = ping_iterator_get_context (iter);
1703
1704                 printf ("\n--- %s ping statistics ---\n"
1705                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1706                                 context->host, context->req_sent, context->req_rcvd,
1707                                 context_get_packet_loss (context),
1708                                 context->latency_total);
1709
1710                 {
1711                         double pct_failed = 1.0 - (((double) context->req_rcvd)
1712                                         / ((double) context->req_sent));
1713                         if (pct_failed > opt_exit_status_threshold)
1714                                 failure_count++;
1715                 }
1716
1717                 if (context->req_rcvd != 0)
1718                 {
1719                         double min;
1720                         double median;
1721                         double max;
1722                         double percentile;
1723
1724                         min = percentile_to_latency (context, 0.0);
1725                         median = percentile_to_latency (context, 50.0);
1726                         max = percentile_to_latency (context, 100.0);
1727                         percentile = percentile_to_latency (context, opt_percentile);
1728
1729                         printf ("RTT[ms]: min = %.0f, median = %.0f, p(%.0f) = %.0f, max = %.0f\n",
1730                                         min, median, opt_percentile, percentile, max);
1731                 }
1732
1733                 ping_iterator_set_context (iter, NULL);
1734                 context_destroy (context);
1735         }
1736
1737         return (failure_count);
1738 } /* }}} int post_loop_hook */
1739
1740 int main (int argc, char **argv) /* {{{ */
1741 {
1742         pingobj_t      *ping;
1743         pingobj_iter_t *iter;
1744
1745         struct sigaction sigint_action;
1746
1747         struct timeval  tv_begin;
1748         struct timeval  tv_end;
1749         struct timespec ts_wait;
1750         struct timespec ts_int;
1751
1752         int optind;
1753         int i;
1754         int status;
1755 #if _POSIX_SAVED_IDS
1756         uid_t saved_set_uid;
1757
1758         /* Save the old effective user id */
1759         saved_set_uid = geteuid ();
1760         /* Set the effective user ID to the real user ID without changing the
1761          * saved set-user ID */
1762         status = seteuid (getuid ());
1763         if (status != 0)
1764         {
1765                 fprintf (stderr, "Temporarily dropping privileges "
1766                                 "failed: %s\n", strerror (errno));
1767                 exit (EXIT_FAILURE);
1768         }
1769 #endif
1770
1771         setlocale(LC_ALL, "");
1772         optind = read_options (argc, argv);
1773
1774 #if !_POSIX_SAVED_IDS
1775         /* Cannot temporarily drop privileges -> reject every file but "-". */
1776         if ((opt_filename != NULL)
1777                         && (strcmp ("-", opt_filename) != 0)
1778                         && (getuid () != geteuid ()))
1779         {
1780                 fprintf (stderr, "Your real and effective user IDs don't "
1781                                 "match. Reading from a file (option '-f')\n"
1782                                 "is therefore too risky. You can still read "
1783                                 "from STDIN using '-f -' if you like.\n"
1784                                 "Sorry.\n");
1785                 exit (EXIT_FAILURE);
1786         }
1787 #endif
1788
1789         if ((optind >= argc) && (opt_filename == NULL)) {
1790                 usage_exit (argv[0], 1);
1791         }
1792
1793         if ((ping = ping_construct ()) == NULL)
1794         {
1795                 fprintf (stderr, "ping_construct failed\n");
1796                 return (1);
1797         }
1798
1799         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1800         {
1801                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1802                                 opt_send_ttl, ping_get_error (ping));
1803         }
1804
1805         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1806         {
1807                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1808                                 opt_send_qos, ping_get_error (ping));
1809         }
1810
1811         {
1812                 double temp_sec;
1813                 double temp_nsec;
1814
1815                 temp_nsec = modf (opt_interval, &temp_sec);
1816                 ts_int.tv_sec  = (time_t) temp_sec;
1817                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1818
1819                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1820         }
1821
1822         if (ping_setopt (ping, PING_OPT_TIMEOUT, (void*)(&opt_timeout)) != 0)
1823         {
1824                 fprintf (stderr, "Setting timeout failed: %s\n",
1825                                 ping_get_error (ping));
1826         }
1827
1828         if (opt_addrfamily != PING_DEF_AF)
1829                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1830
1831         if (opt_srcaddr != NULL)
1832         {
1833                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1834                 {
1835                         fprintf (stderr, "Setting source address failed: %s\n",
1836                                         ping_get_error (ping));
1837                 }
1838         }
1839
1840         if (opt_device != NULL)
1841         {
1842                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1843                 {
1844                         fprintf (stderr, "Setting device failed: %s\n",
1845                                         ping_get_error (ping));
1846                 }
1847         }
1848
1849         if (opt_mark != NULL)
1850         {
1851                 char *endp = NULL;
1852                 int mark = (int) strtol (opt_mark, &endp, /* base = */ 0);
1853                 if ((opt_mark[0] != 0) && (endp != NULL) && (*endp == 0))
1854                 {
1855                         if (ping_setopt(ping, PING_OPT_MARK, (void*)(&mark)) != 0)
1856                         {
1857                                 fprintf (stderr, "Setting mark failed: %s\n",
1858                                         ping_get_error (ping));
1859                         }
1860                 }
1861                 else
1862                 {
1863                         fprintf(stderr, "Ignoring invalid mark: %s\n", optarg);
1864                 }
1865         }
1866
1867         if (opt_filename != NULL)
1868         {
1869                 FILE *infile;
1870                 char line[256];
1871                 char host[256];
1872
1873                 if (strcmp (opt_filename, "-") == 0)
1874                         /* Open STDIN */
1875                         infile = fdopen(0, "r");
1876                 else
1877                         infile = fopen(opt_filename, "r");
1878
1879                 if (infile == NULL)
1880                 {
1881                         fprintf (stderr, "Opening %s failed: %s\n",
1882                                         (strcmp (opt_filename, "-") == 0)
1883                                         ? "STDIN" : opt_filename,
1884                                         strerror(errno));
1885                         return (1);
1886                 }
1887
1888 #if _POSIX_SAVED_IDS
1889                 /* Regain privileges */
1890                 status = seteuid (saved_set_uid);
1891                 if (status != 0)
1892                 {
1893                         fprintf (stderr, "Temporarily re-gaining privileges "
1894                                         "failed: %s\n", strerror (errno));
1895                         exit (EXIT_FAILURE);
1896                 }
1897 #endif
1898
1899                 while (fgets(line, sizeof(line), infile))
1900                 {
1901                         /* Strip whitespace */
1902                         if (sscanf(line, "%s", host) != 1)
1903                                 continue;
1904
1905                         if ((host[0] == 0) || (host[0] == '#'))
1906                                 continue;
1907
1908                         if (ping_host_add(ping, host) < 0)
1909                         {
1910                                 const char *errmsg = ping_get_error (ping);
1911
1912                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1913                                 continue;
1914                         }
1915                         else
1916                         {
1917                                 host_num++;
1918                         }
1919                 }
1920
1921 #if _POSIX_SAVED_IDS
1922                 /* Drop privileges */
1923                 status = seteuid (getuid ());
1924                 if (status != 0)
1925                 {
1926                         fprintf (stderr, "Temporarily dropping privileges "
1927                                         "failed: %s\n", strerror (errno));
1928                         exit (EXIT_FAILURE);
1929                 }
1930 #endif
1931
1932                 fclose(infile);
1933         }
1934
1935 #if _POSIX_SAVED_IDS
1936         /* Regain privileges */
1937         status = seteuid (saved_set_uid);
1938         if (status != 0)
1939         {
1940                 fprintf (stderr, "Temporarily re-gaining privileges "
1941                                 "failed: %s\n", strerror (errno));
1942                 exit (EXIT_FAILURE);
1943         }
1944 #endif
1945
1946         for (i = optind; i < argc; i++)
1947         {
1948                 if (ping_host_add (ping, argv[i]) < 0)
1949                 {
1950                         const char *errmsg = ping_get_error (ping);
1951
1952                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1953                         continue;
1954                 }
1955                 else
1956                 {
1957                         host_num++;
1958                 }
1959         }
1960
1961         /* Permanently drop root privileges if we're setuid-root. */
1962         status = setuid (getuid ());
1963         if (status != 0)
1964         {
1965                 fprintf (stderr, "Dropping privileges failed: %s\n",
1966                                 strerror (errno));
1967                 exit (EXIT_FAILURE);
1968         }
1969
1970         if (host_num == 0)
1971                 exit (EXIT_FAILURE);
1972
1973 #if _POSIX_SAVED_IDS
1974         saved_set_uid = (uid_t) -1;
1975 #endif
1976
1977         if (opt_outfile != NULL)
1978         {
1979                 outfile = fopen (opt_outfile, "a");
1980                 if (outfile == NULL)
1981                 {
1982                         fprintf (stderr, "opening \"%s\" failed: %s\n",
1983                                  opt_outfile, strerror (errno));
1984                         exit (EXIT_FAILURE);
1985                 }
1986         }
1987
1988         ping_initialize_contexts (ping);
1989
1990         if (i == 0)
1991                 return (1);
1992
1993         memset (&sigint_action, '\0', sizeof (sigint_action));
1994         sigint_action.sa_handler = sigint_handler;
1995         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1996         {
1997                 perror ("sigaction");
1998                 return (1);
1999         }
2000
2001         pre_loop_hook (ping);
2002
2003         while (opt_count != 0)
2004         {
2005                 int index;
2006                 int status;
2007
2008                 if (gettimeofday (&tv_begin, NULL) < 0)
2009                 {
2010                         perror ("gettimeofday");
2011                         return (1);
2012                 }
2013
2014                 status = ping_send (ping);
2015                 if (status == -EINTR)
2016                 {
2017                         continue;
2018                 }
2019                 else if (status < 0)
2020                 {
2021                         fprintf (stderr, "ping_send failed: %s\n",
2022                                         ping_get_error (ping));
2023                         return (1);
2024                 }
2025
2026                 index = 0;
2027                 for (iter = ping_iterator_get (ping);
2028                                 iter != NULL;
2029                                 iter = ping_iterator_next (iter))
2030                 {
2031                         update_host_hook (iter, index);
2032                         index++;
2033                 }
2034
2035                 pre_sleep_hook (ping);
2036
2037                 /* Don't sleep in the last iteration */
2038                 if (opt_count == 1)
2039                         break;
2040
2041                 if (gettimeofday (&tv_end, NULL) < 0)
2042                 {
2043                         perror ("gettimeofday");
2044                         return (1);
2045                 }
2046
2047                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
2048
2049                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
2050                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
2051                 {
2052                         if (errno == EINTR)
2053                         {
2054                                 continue;
2055                         }
2056                         else
2057                         {
2058                                 perror ("nanosleep");
2059                                 break;
2060                         }
2061                 }
2062
2063                 post_sleep_hook (ping);
2064
2065                 if (opt_count > 0)
2066                         opt_count--;
2067         } /* while (opt_count != 0) */
2068
2069         /* Returns the number of failed hosts according to -Z. */
2070         status = post_loop_hook (ping);
2071
2072         ping_destroy (ping);
2073
2074         if (outfile != NULL)
2075         {
2076                 fclose (outfile);
2077                 outfile = NULL;
2078         }
2079
2080         if (status == 0)
2081                 exit (EXIT_SUCCESS);
2082         else
2083         {
2084                 if (status > 255)
2085                         status = 255;
2086                 exit (status);
2087         }
2088 } /* }}} int main */
2089
2090 /* vim: set fdm=marker : */