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 defined HAVE_NCURSESW_CURSES_H
  86 #  include <ncursesw/curses.h>
  87 #elif defined HAVE_NCURSESW_H
  88 #  include <ncursesw.h>
  89 #elif defined HAVE_NCURSES_CURSES_H
  90 #  include <ncurses/curses.h>
  91 #elif defined HAVE_NCURSES_H
  92 #  include <ncurses.h>
  93 #else
  94 #  error "SysV or X/Open-compatible Curses header file required"
  95 #endif
  96
  97 # define OPING_GREEN 1
  98 # define OPING_YELLOW 2
  99 # define OPING_RED 3
 100 # define OPING_GREEN_HIST 4
 101 # define OPING_YELLOW_HIST 5
 102 # define OPING_RED_HIST 6
 103
 104 double const threshold_green = 0.8;
 105 double const threshold_yellow = 0.95;
 106
 107 static char const * const hist_symbols_utf8[] = {
 108         "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
 109 static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8)
 110         / sizeof (hist_symbols_utf8[0]);
 111
 112 /* scancodes for 6 levels of horizontal bars, ncurses-specific */
 113 /* those are not the usual constants because those are not constant */
 114 static int const hist_symbols_acs[] = {
 115         115, /* ACS_S9 "⎽" */
 116         114, /* ACS_S7 "⎼" */
 117         113, /* ACS_S5 "─" */
 118         112, /* ACS_S3 "⎻" */
 119         111  /* ACS_S1 "⎺" */
 120 };
 121 static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs)
 122         / sizeof (hist_symbols_acs[0]);
 123
 124 /* use different colors without a background for scancodes */
 125 static int const hist_colors_utf8[] = {
 126         OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST };
 127 static int const hist_colors_acs[] = {
 128         OPING_GREEN, OPING_YELLOW, OPING_RED };
 129 /* assuming that both arrays are the same size */
 130 static size_t const hist_colors_num = sizeof (hist_colors_utf8)
 131         / sizeof (hist_colors_utf8[0]);
 132 #endif
 133
 134 /* "─" */
 135 #define BOXPLOT_WHISKER_BAR       (113 | A_ALTCHARSET)
 136 /* "├" */
 137 #define BOXPLOT_WHISKER_LEFT_END  (116 | A_ALTCHARSET)
 138 /* "┤" */
 139 #define BOXPLOT_WHISKER_RIGHT_END (117 | A_ALTCHARSET)
 140 /* Inverted */
 141 #define BOXPLOT_BOX               ' '
 142 /* "│", inverted */
 143 #define BOXPLOT_MEDIAN            (120 | A_ALTCHARSET)
 144
 145 #include "oping.h"
 146
 147 #ifndef _POSIX_SAVED_IDS
 148 # define _POSIX_SAVED_IDS 0
 149 #endif
 150
 151 #ifndef IPTOS_MINCOST
 152 # define IPTOS_MINCOST 0x02
 153 #endif
 154
 155 /* Remove GNU specific __attribute__ settings when using another compiler */
 156 #if !__GNUC__
 157 # define __attribute__(x) /**/
 158 #endif
 159
 160 typedef struct ping_context
 161 {
 162         char host[NI_MAXHOST];
 163         char addr[NI_MAXHOST];
 164
 165         int index;
 166         int req_sent;
 167         int req_rcvd;
 168
 169         double latency_total;
 170
 171 #ifndef HISTORY_SIZE_MAX
 172 # define HISTORY_SIZE_MAX 900
 173 #endif
 174         /* The last n RTTs in the order they were sent. */
 175         double history_by_time[HISTORY_SIZE_MAX];
 176
 177         /* Current number of entries in the history. This is a value between 0
 178          * and HISTORY_SIZE_MAX. */
 179         size_t history_size;
 180
 181         /* Total number of reponses received. */
 182         size_t history_received;
 183
 184         /* Index of the next RTT to be written to history_by_time. This wraps
 185          * around to 0 once the histroty has grown to HISTORY_SIZE_MAX. */
 186         size_t history_index;
 187
 188         /* The last history_size RTTs sorted by value. timed out packets (NAN
 189          * entries) are sorted to the back. */
 190         double history_by_value[HISTORY_SIZE_MAX];
 191
 192         /* If set to true, history_by_value has to be re-calculated. */
 193         _Bool history_dirty;
 194
 195 #if USE_NCURSES
 196         WINDOW *window;
 197 #endif
 198 } ping_context_t;
 199
 200 static double  opt_interval   = 1.0;
 201 static double  opt_timeout    = PING_DEF_TIMEOUT;
 202 static int     opt_addrfamily = PING_DEF_AF;
 203 static char   *opt_srcaddr    = NULL;
 204 static char   *opt_device     = NULL;
 205 static char   *opt_mark       = NULL;
 206 static char   *opt_filename   = NULL;
 207 static int     opt_count      = -1;
 208 static int     opt_send_ttl   = 64;
 209 static uint8_t opt_send_qos   = 0;
 210 #define OPING_DEFAULT_PERCENTILE 95.0
 211 static double  opt_percentile = -1.0;
 212 static double  opt_exit_status_threshold = 1.0;
 213 #if USE_NCURSES
 214 static int     opt_show_graph = 1;
 215 static int     opt_utf8       = 0;
 216 #endif
 217 static char   *opt_outfile    = NULL;
 218 static int     opt_bell       = 0;
 219
 220 static int host_num  = 0;
 221 static FILE *outfile = NULL;
 222
 223 #if USE_NCURSES
 224 static WINDOW *main_win = NULL;
 225 #endif
 226
 227 static void sigint_handler (int signal) /* {{{ */
 228 {
 229         /* Make compiler happy */
 230         signal = 0;
 231         /* Exit the loop */
 232         opt_count = 0;
 233 } /* }}} void sigint_handler */
 234
 235 static ping_context_t *context_create () /* {{{ */
 236 {
 237         ping_context_t *ctx = calloc (1, sizeof (*ctx));
 238         if (ctx == NULL)
 239                 return (NULL);
 240
 241 #if USE_NCURSES
 242         ctx->window = NULL;
 243 #endif
 244
 245         return (ctx);
 246 } /* }}} ping_context_t *context_create */
 247
 248 static void context_destroy (ping_context_t *context) /* {{{ */
 249 {
 250         if (context == NULL)
 251                 return;
 252
 253 #if USE_NCURSES
 254         if (context->window != NULL)
 255         {
 256                 delwin (context->window);
 257                 context->window = NULL;
 258         }
 259 #endif
 260
 261         free (context);
 262 } /* }}} void context_destroy */
 263
 264 static int compare_double (void const *arg0, void const *arg1) /* {{{ */
 265 {
 266         double dbl0 = *((double *) arg0);
 267         double dbl1 = *((double *) arg1);
 268
 269         if (isnan (dbl0))
 270         {
 271                 if (isnan (dbl1))
 272                         return 0;
 273                 else
 274                         return 1;
 275         }
 276         else if (isnan (dbl1))
 277                 return -1;
 278         else if (dbl0 < dbl1)
 279                 return -1;
 280         else if (dbl0 > dbl1)
 281                 return 1;
 282         else
 283                 return 0;
 284 } /* }}} int compare_double */
 285
 286 static void clean_history (ping_context_t *ctx) /* {{{ */
 287 {
 288         size_t i;
 289
 290         if (!ctx->history_dirty)
 291                 return;
 292
 293         /* Copy all values from by_time to by_value. */
 294         memcpy (ctx->history_by_value, ctx->history_by_time,
 295                         sizeof (ctx->history_by_time));
 296
 297         /* Remove impossible values caused by adding a new host */
 298         for (i = 0; i < ctx->history_size; i++)
 299                 if (ctx->history_by_value[i] < 0)
 300                         ctx->history_by_value[i] = NAN;
 301
 302         /* Sort all RTTs. */
 303         qsort (ctx->history_by_value, ctx->history_size, sizeof
 304                         (ctx->history_by_value[0]), compare_double);
 305
 306         /* Update the number of received RTTs. */
 307         ctx->history_received = 0;
 308         for (i = 0; i < ctx->history_size; i++)
 309                 if (!isnan (ctx->history_by_value[i]))
 310                         ctx->history_received++;
 311
 312         /* Mark as clean. */
 313         ctx->history_dirty = 0;
 314 } /* }}} void clean_history */
 315
 316 static double percentile_to_latency (ping_context_t *ctx, /* {{{ */
 317                 double percentile)
 318 {
 319         size_t index;
 320
 321         clean_history (ctx);
 322
 323         /* Not a single packet was received successfully. */
 324         if (ctx->history_received == 0)
 325                 return NAN;
 326
 327         if (percentile <= 0.0)
 328                 index = 0;
 329         else if (percentile >= 100.0)
 330                 index = ctx->history_received - 1;
 331         else
 332         {
 333                 index = (size_t) ceil ((percentile / 100.0) * ((double) ctx->history_received));
 334                 assert (index > 0);
 335                 index--;
 336         }
 337
 338         return (ctx->history_by_value[index]);
 339 } /* }}} double percentile_to_latency */
 340
 341 #if USE_NCURSES
 342 static double latency_to_ratio (ping_context_t *ctx, /* {{{ */
 343                 double latency)
 344 {
 345         size_t low;
 346         size_t high;
 347         size_t index;
 348
 349         clean_history (ctx);
 350
 351         /* Not a single packet was received successfully. */
 352         if (ctx->history_received == 0)
 353                 return NAN;
 354
 355         low = 0;
 356         high = ctx->history_received - 1;
 357
 358         if (latency < ctx->history_by_value[low])
 359                 return 0.0;
 360         else if (latency >= ctx->history_by_value[high])
 361                 return 100.0;
 362
 363         /* Do a binary search for the latency. This will work even when the
 364          * exact latency is not in the array. If the latency is in the array
 365          * multiple times, "low" will be set to the index of the last
 366          * occurrence. The value at index "high" will be larger than the
 367          * searched for latency (assured by the above "if" block. */
 368         while ((high - low) > 1)
 369         {
 370                 index = (high + low) / 2;
 371
 372                 if (ctx->history_by_value[index] > latency)
 373                         high = index;
 374                 else
 375                         low = index;
 376         }
 377
 378         assert (ctx->history_by_value[high] > latency);
 379         assert (ctx->history_by_value[low] <= latency);
 380
 381         if (ctx->history_by_value[low] == latency)
 382                 index = low;
 383         else
 384                 index = high;
 385
 386         return (((double) (index + 1)) / ((double) ctx->history_received));
 387 } /* }}} double latency_to_ratio */
 388 #endif
 389
 390 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 391 {
 392         if (ctx == NULL)
 393                 return (-1.0);
 394
 395         if (ctx->req_sent < 1)
 396                 return (0.0);
 397
 398         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 399                         / ((double) ctx->req_sent));
 400 } /* }}} double context_get_packet_loss */
 401
 402 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 403 {
 404         pingobj_iter_t *iter;
 405         int index;
 406         size_t history_size = 0;
 407
 408         if (ping == NULL)
 409                 return (EINVAL);
 410
 411         index = 0;
 412         for (iter = ping_iterator_get (ping);
 413                         iter != NULL;
 414                         iter = ping_iterator_next (iter))
 415         {
 416                 ping_context_t *context;
 417                 size_t buffer_size;
 418                 int i;
 419
 420                 context = ping_iterator_get_context(iter);
 421
 422                 /* if this is a previously existing host, do not recreate it */
 423                 if (context != NULL)
 424                 {
 425                         history_size = context->history_size;
 426                         context->index = index++;
 427                         continue;
 428                 }
 429
 430                 context = context_create ();
 431                 context->index = index;
 432
 433                 /* start new hosts at the same graph point as old hosts */
 434                 context->history_size = history_size;
 435                 context->history_index = history_size;
 436                 for (i = 0; i < history_size; i++)
 437                         context->history_by_time[i] = -1;
 438
 439                 buffer_size = sizeof (context->host);
 440                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 441
 442                 buffer_size = sizeof (context->addr);
 443                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 444
 445                 ping_iterator_set_context (iter, (void *) context);
 446
 447                 index++;
 448         }
 449
 450         return (0);
 451 } /* }}} int ping_initialize_contexts */
 452
 453 static void usage_exit (const char *name, int status) /* {{{ */
 454 {
 455         fprintf (stderr, "Usage: %s [OPTIONS] "
 456                                 "-f filename | host [host [host ...]]\n"
 457
 458                         "\nAvailable options:\n"
 459                         "  -4|-6        force the use of IPv4 or IPv6\n"
 460                         "  -c count     number of ICMP packets to send\n"
 461                         "  -i interval  interval with which to send ICMP packets\n"
 462                         "  -w timeout   time to wait for replies, in seconds\n"
 463                         "  -t ttl       time to live for each ICMP packet\n"
 464                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 465                         "               Use \"-Q help\" for a list of valid options.\n"
 466                         "  -I srcaddr   source address\n"
 467                         "  -D device    outgoing interface name\n"
 468                         "  -m mark      mark to set on outgoing packets\n"
 469                         "  -f filename  read hosts from <filename>\n"
 470                         "  -O filename  write RTT measurements to <filename>\n"
 471 #if USE_NCURSES
 472                         "  -u / -U      force / disable UTF-8 output\n"
 473                         "  -g graph     graph type to draw\n"
 474 #endif
 475                         "  -P percent   Report the n'th percentile of latency\n"
 476                         "  -Z percent   Exit with non-zero exit status if more than this percentage of\n"
 477                         "               probes timed out. (default: never)\n"
 478
 479                         "\noping "PACKAGE_VERSION", http://noping.cc/\n"
 480                         "by Florian octo Forster <ff@octo.it>\n"
 481                         "for contributions see `AUTHORS'\n",
 482                         name);
 483         exit (status);
 484 } /* }}} void usage_exit */
 485
 486 __attribute__((noreturn))
 487 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 488 {
 489         if (arg != 0)
 490                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 491
 492         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 493                         "\n"
 494                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 495                         "\n"
 496                         "    be                     Best Effort (BE, default PHB).\n"
 497                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 498                         "                           (low delay, low loss, low jitter)\n"
 499                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 500                         "                           (capacity-admitted traffic)\n"
 501                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 502                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 503                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 504                         "                           For example: \"cs1\" (priority traffic)\n"
 505                         "\n"
 506                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 507                         "\n"
 508                         "    lowdelay     (%#04x)    minimize delay\n"
 509                         "    throughput   (%#04x)    maximize throughput\n"
 510                         "    reliability  (%#04x)    maximize reliability\n"
 511                         "    mincost      (%#04x)    minimize monetary cost\n"
 512                         "\n"
 513                         "  Specify manually\n"
 514                         "\n"
 515                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 516                         "       0 -  255            Decimal numeric specification.\n"
 517                         "\n",
 518                         (unsigned int) IPTOS_LOWDELAY,
 519                         (unsigned int) IPTOS_THROUGHPUT,
 520                         (unsigned int) IPTOS_RELIABILITY,
 521                         (unsigned int) IPTOS_MINCOST);
 522
 523         exit (status);
 524 } /* }}} void usage_qos_exit */
 525
 526 static int set_opt_send_qos (const char *opt) /* {{{ */
 527 {
 528         if (opt == NULL)
 529                 return (EINVAL);
 530
 531         if (strcasecmp ("help", opt) == 0)
 532                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 533         /* DiffServ (RFC 2474): */
 534         /* - Best effort (BE) */
 535         else if (strcasecmp ("be", opt) == 0)
 536                 opt_send_qos = 0;
 537         /* - Expedited Forwarding (EF, RFC 3246) */
 538         else if (strcasecmp ("ef", opt) == 0)
 539                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 540         /* - Voice Admit (VA, RFC 5865) */
 541         else if (strcasecmp ("va", opt) == 0)
 542                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 543         /* - Assured Forwarding (AF, RFC 2597) */
 544         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 545                         && (strlen (opt) == 4))
 546         {
 547                 uint8_t dscp;
 548                 uint8_t class = 0;
 549                 uint8_t prec = 0;
 550
 551                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 552                 if (opt[2] == '1')
 553                         class = 1;
 554                 else if (opt[2] == '2')
 555                         class = 2;
 556                 else if (opt[2] == '3')
 557                         class = 3;
 558                 else if (opt[2] == '4')
 559                         class = 4;
 560                 else
 561                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 562
 563                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 564                 if (opt[3] == '1')
 565                         prec = 1;
 566                 else if (opt[3] == '2')
 567                         prec = 2;
 568                 else if (opt[3] == '3')
 569                         prec = 3;
 570                 else
 571                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 572
 573                 dscp = (8 * class) + (2 * prec);
 574                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 575                 opt_send_qos = dscp << 2;
 576         }
 577         /* - Class Selector (CS) */
 578         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 579                         && (strlen (opt) == 3))
 580         {
 581                 uint8_t class;
 582
 583                 if ((opt[2] < '0') || (opt[2] > '7'))
 584                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 585
 586                 /* Not exactly legal by the C standard, but I don't know of any
 587                  * system not supporting this hack. */
 588                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 589                 opt_send_qos = class << 5;
 590         }
 591         /* Type of Service (RFC 1349) */
 592         else if (strcasecmp ("lowdelay", opt) == 0)
 593                 opt_send_qos = IPTOS_LOWDELAY;
 594         else if (strcasecmp ("throughput", opt) == 0)
 595                 opt_send_qos = IPTOS_THROUGHPUT;
 596         else if (strcasecmp ("reliability", opt) == 0)
 597                 opt_send_qos = IPTOS_RELIABILITY;
 598         else if (strcasecmp ("mincost", opt) == 0)
 599                 opt_send_qos = IPTOS_MINCOST;
 600         /* Numeric value */
 601         else
 602         {
 603                 unsigned long value;
 604                 char *endptr;
 605
 606                 errno = 0;
 607                 endptr = NULL;
 608                 value = strtoul (opt, &endptr, /* base = */ 0);
 609                 if ((errno != 0) || (endptr == opt)
 610                                 || (endptr == NULL) || (*endptr != 0)
 611                                 || (value > 0xff))
 612                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 613
 614                 opt_send_qos = (uint8_t) value;
 615         }
 616
 617         return (0);
 618 } /* }}} int set_opt_send_qos */
 619
 620 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 621 {
 622         uint8_t dscp;
 623         uint8_t ecn;
 624         char *dscp_str;
 625         char *ecn_str;
 626
 627         dscp = qos >> 2;
 628         ecn = qos & 0x03;
 629
 630         switch (dscp)
 631         {
 632                 case 0x00: dscp_str = "be";  break;
 633                 case 0x2e: dscp_str = "ef";  break;
 634                 case 0x2d: dscp_str = "va";  break;
 635                 case 0x0a: dscp_str = "af11"; break;
 636                 case 0x0c: dscp_str = "af12"; break;
 637                 case 0x0e: dscp_str = "af13"; break;
 638                 case 0x12: dscp_str = "af21"; break;
 639                 case 0x14: dscp_str = "af22"; break;
 640                 case 0x16: dscp_str = "af23"; break;
 641                 case 0x1a: dscp_str = "af31"; break;
 642                 case 0x1c: dscp_str = "af32"; break;
 643                 case 0x1e: dscp_str = "af33"; break;
 644                 case 0x22: dscp_str = "af41"; break;
 645                 case 0x24: dscp_str = "af42"; break;
 646                 case 0x26: dscp_str = "af43"; break;
 647                 case 0x08: dscp_str = "cs1";  break;
 648                 case 0x10: dscp_str = "cs2";  break;
 649                 case 0x18: dscp_str = "cs3";  break;
 650                 case 0x20: dscp_str = "cs4";  break;
 651                 case 0x28: dscp_str = "cs5";  break;
 652                 case 0x30: dscp_str = "cs6";  break;
 653                 case 0x38: dscp_str = "cs7";  break;
 654                 default:   dscp_str = NULL;
 655         }
 656
 657         switch (ecn)
 658         {
 659                 case 0x01: ecn_str = ",ecn(1)"; break;
 660                 case 0x02: ecn_str = ",ecn(0)"; break;
 661                 case 0x03: ecn_str = ",ce"; break;
 662                 default:   ecn_str = "";
 663         }
 664
 665         if (dscp_str == NULL)
 666                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 667         else
 668                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 669         buffer[buffer_size - 1] = 0;
 670
 671         return (buffer);
 672 } /* }}} char *format_qos */
 673
 674 static int read_options (int argc, char **argv) /* {{{ */
 675 {
 676         int optchar;
 677
 678         while (1)
 679         {
 680                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:O:P:m:w:b"
 681 #if USE_NCURSES
 682                                 "uUg:"
 683 #endif
 684                                 );
 685
 686                 if (optchar == -1)
 687                         break;
 688
 689                 switch (optchar)
 690                 {
 691                         case '4':
 692                         case '6':
 693                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 694                                 break;
 695
 696                         case 'c':
 697                                 {
 698                                         int new_count;
 699                                         new_count = atoi (optarg);
 700                                         if (new_count > 0)
 701                                         {
 702                                                 opt_count = new_count;
 703
 704                                                 if ((opt_percentile < 0.0) && (opt_count < 20))
 705                                                         opt_percentile = 100.0 * (opt_count - 1) / opt_count;
 706                                         }
 707                                         else
 708                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 709                                                                 optarg);
 710                                 }
 711                                 break;
 712
 713                         case 'f':
 714                                 {
 715                                         if (opt_filename != NULL)
 716                                                 free (opt_filename);
 717                                         opt_filename = strdup (optarg);
 718                                 }
 719                                 break;
 720
 721                         case 'i':
 722                                 {
 723                                         double new_interval;
 724                                         new_interval = atof (optarg);
 725                                         if (new_interval < 0.001)
 726                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 727                                                                 optarg);
 728                                         else
 729                                                 opt_interval = new_interval;
 730                                 }
 731                                 break;
 732
 733                         case 'w':
 734                                 {
 735                                         char *endp = NULL;
 736                                         double t = strtod (optarg, &endp);
 737                                         if ((optarg[0] != 0) && (endp != NULL) && (*endp == 0))
 738                                                 opt_timeout = t;
 739                                         else
 740                                                 fprintf (stderr, "Ignoring invalid timeout: %s\n",
 741                                                                 optarg);
 742                                 }
 743                                 break;
 744
 745                         case 'I':
 746                                 {
 747                                         if (opt_srcaddr != NULL)
 748                                                 free (opt_srcaddr);
 749                                         opt_srcaddr = strdup (optarg);
 750                                 }
 751                                 break;
 752
 753                         case 'D':
 754                                 opt_device = optarg;
 755                                 break;
 756
 757                         case 'm':
 758                                 opt_mark = optarg;
 759                                 break;
 760
 761                         case 't':
 762                         {
 763                                 int new_send_ttl;
 764                                 new_send_ttl = atoi (optarg);
 765                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 766                                         opt_send_ttl = new_send_ttl;
 767                                 else
 768                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 769                                                         optarg);
 770                                 break;
 771                         }
 772
 773                         case 'Q':
 774                                 set_opt_send_qos (optarg);
 775                                 break;
 776
 777                         case 'O':
 778                                 {
 779                                         free (opt_outfile);
 780                                         opt_outfile = strdup (optarg);
 781                                 }
 782                                 break;
 783
 784                         case 'P':
 785                                 {
 786                                         double new_percentile;
 787                                         new_percentile = atof (optarg);
 788                                         if (isnan (new_percentile)
 789                                                         || (new_percentile < 0.1)
 790                                                         || (new_percentile > 100.0))
 791                                                 fprintf (stderr, "Ignoring invalid percentile: %s\n",
 792                                                                 optarg);
 793                                         else
 794                                                 opt_percentile = new_percentile;
 795                                 }
 796                                 break;
 797
 798 #if USE_NCURSES
 799                         case 'g':
 800                                 if (strcasecmp ("none", optarg) == 0)
 801                                         opt_show_graph = 0;
 802                                 else if (strcasecmp ("prettyping", optarg) == 0)
 803                                         opt_show_graph = 1;
 804                                 else if (strcasecmp ("histogram", optarg) == 0)
 805                                         opt_show_graph = 2;
 806                                 else if (strcasecmp ("boxplot", optarg) == 0)
 807                                         opt_show_graph = 3;
 808                                 else
 809                                         fprintf (stderr, "Unknown graph option: %s\n", optarg);
 810                                 break;
 811
 812                         case 'u':
 813                                 opt_utf8 = 2;
 814                                 break;
 815                         case 'U':
 816                                 opt_utf8 = 1;
 817                                 break;
 818 #endif
 819                         case 'b':
 820                                 opt_bell = 1;
 821                                 break;
 822
 823                         case 'Z':
 824                         {
 825                                 char *endptr = NULL;
 826                                 double tmp;
 827
 828                                 errno = 0;
 829                                 tmp = strtod (optarg, &endptr);
 830                                 if ((errno != 0) || (endptr == NULL) || (*endptr != 0) || (tmp < 0.0) || (tmp > 100.0))
 831                                 {
 832                                         fprintf (stderr, "Ignoring invalid -Z argument: %s\n", optarg);
 833                                         fprintf (stderr, "The \"-Z\" option requires a numeric argument between 0 and 100.\n");
 834                                 }
 835                                 else
 836                                         opt_exit_status_threshold = tmp / 100.0;
 837
 838                                 break;
 839                         }
 840
 841                         case 'h':
 842                                 usage_exit (argv[0], 0);
 843                                 break;
 844
 845                         default:
 846                                 usage_exit (argv[0], 1);
 847                 }
 848         }
 849
 850         if (opt_percentile <= 0.0)
 851                 opt_percentile = OPING_DEFAULT_PERCENTILE;
 852
 853         return (optind);
 854 } /* }}} read_options */
 855
 856 static void time_normalize (struct timespec *ts) /* {{{ */
 857 {
 858         while (ts->tv_nsec < 0)
 859         {
 860                 if (ts->tv_sec == 0)
 861                 {
 862                         ts->tv_nsec = 0;
 863                         return;
 864                 }
 865
 866                 ts->tv_sec  -= 1;
 867                 ts->tv_nsec += 1000000000;
 868         }
 869
 870         while (ts->tv_nsec >= 1000000000)
 871         {
 872                 ts->tv_sec  += 1;
 873                 ts->tv_nsec -= 1000000000;
 874         }
 875 } /* }}} void time_normalize */
 876
 877 static void time_calc (struct timespec *ts_dest, /* {{{ */
 878                 const struct timespec *ts_int,
 879                 const struct timeval  *tv_begin,
 880                 const struct timeval  *tv_end)
 881 {
 882         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 883         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 884         time_normalize (ts_dest);
 885
 886         /* Assure that `(begin + interval) > end'.
 887          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 888          * which may be `unsigned. *sigh* */
 889         if ((tv_end->tv_sec > ts_dest->tv_sec)
 890                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 891                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 892         {
 893                 ts_dest->tv_sec  = 0;
 894                 ts_dest->tv_nsec = 0;
 895                 return;
 896         }
 897
 898         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 899         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 900         time_normalize (ts_dest);
 901 } /* }}} void time_calc */
 902
 903 #if USE_NCURSES
 904 static _Bool has_utf8() /* {{{ */
 905 {
 906 # if HAVE_NCURSESW_NCURSES_H
 907         if (!opt_utf8)
 908         {
 909                 /* Automatically determine */
 910                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 911                         opt_utf8 = 2;
 912                 else
 913                         opt_utf8 = 1;
 914         }
 915         return ((_Bool) (opt_utf8 - 1));
 916 # else
 917         return (0);
 918 # endif
 919 } /* }}} _Bool has_utf8 */
 920
 921 static int update_graph_boxplot (ping_context_t *ctx) /* {{{ */
 922 {
 923         uint32_t *counters;
 924         double *ratios;
 925         size_t i;
 926         size_t x_max;
 927         size_t x;
 928
 929         clean_history (ctx);
 930
 931         if (ctx->history_received == 0)
 932                 return (ENOENT);
 933
 934         x_max = (size_t) getmaxx (ctx->window);
 935         if (x_max <= 8)
 936                 return (EINVAL);
 937         x_max -= 4;
 938
 939         counters = calloc (x_max, sizeof (*counters));
 940         ratios = calloc (x_max, sizeof (*ratios));
 941
 942         /* Bucketize */
 943         for (i = 0; i < ctx->history_received; i++)
 944         {
 945                 double latency = ctx->history_by_value[i] / 1000.0;
 946                 size_t index = (size_t) (((double) x_max) * latency / opt_interval);
 947
 948                 if (index >= x_max)
 949                         index = x_max - 1;
 950
 951                 counters[index]++;
 952         }
 953
 954         /* Sum and calc ratios */
 955         ratios[0] = ((double) counters[0]) / ((double) ctx->history_received);
 956         for (x = 1; x < x_max; x++)
 957         {
 958                 counters[x] += counters[x - 1];
 959                 ratios[x] = ((double) counters[x]) / ((double) ctx->history_received);
 960         }
 961
 962         for (x = 0; x < x_max; x++)
 963         {
 964                 int symbol = ' ';
 965                 _Bool reverse = 0;
 966
 967                 if (x == 0)
 968                 {
 969                         if (ratios[x] >= 0.5)
 970                         {
 971                                 symbol = BOXPLOT_MEDIAN;
 972                                 reverse = 1;
 973                         }
 974                         else if (ratios[x] > 0.25)
 975                         {
 976                                 symbol = BOXPLOT_BOX;
 977                                 reverse = 1;
 978                         }
 979                         else if (ratios[x] > 0.025)
 980                                 symbol = BOXPLOT_WHISKER_BAR;
 981                         else
 982                                 symbol = ' '; /* NOP */
 983                 }
 984                 else /* (x != 0) */
 985                 {
 986                         if ((ratios[x - 1] < 0.5) && (ratios[x] >= 0.5))
 987                         {
 988                                 symbol = BOXPLOT_MEDIAN;
 989                                 reverse = 1;
 990                         }
 991                         else if (((ratios[x] >= 0.25) && (ratios[x] <= 0.75))
 992                                         || ((ratios[x - 1] < 0.75) && (ratios[x] > 0.75)))
 993                         {
 994                                 symbol = BOXPLOT_BOX;
 995                                 reverse = 1;
 996                         }
 997                         else if ((ratios[x] < 0.5) && (ratios[x] >= 0.025))
 998                         {
 999                                 if (ratios[x - 1] < 0.025)
1000                                         symbol = BOXPLOT_WHISKER_LEFT_END;
1001                                 else
1002                                         symbol = BOXPLOT_WHISKER_BAR;
1003                         }
1004                         else if ((ratios[x] > .5) && (ratios[x] < 0.975))
1005                         {
1006                                 symbol = BOXPLOT_WHISKER_BAR;
1007                         }
1008                         else if ((ratios[x] >= 0.975) && (ratios[x - 1] < 0.975))
1009                                 symbol = BOXPLOT_WHISKER_RIGHT_END;
1010                 }
1011
1012                 if (reverse)
1013                         wattron (ctx->window, A_REVERSE);
1014                 mvwaddch (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
1015                 // mvwprintw (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
1016                 if (reverse)
1017                         wattroff (ctx->window, A_REVERSE);
1018         }
1019
1020         free (counters);
1021         free (ratios);
1022         return (0);
1023 } /* }}} int update_graph_boxplot */
1024
1025 static int update_graph_prettyping (ping_context_t *ctx, /* {{{ */
1026                 double latency)
1027 {
1028         size_t x;
1029         size_t x_max;
1030         size_t history_offset;
1031
1032         x_max = (size_t) getmaxx (ctx->window);
1033         if (x_max <= 4)
1034                 return (EINVAL);
1035         x_max -= 4;
1036
1037         /* Determine the first index in the history we need to draw
1038          * the graph. */
1039         history_offset = 0;
1040         if (((size_t) x_max) < ctx->history_size) /* window is smaller than history */
1041         {
1042                 if (ctx->history_index > x_max)
1043                         history_offset = ctx->history_index - x_max;
1044                 else /* wrap around */
1045                         history_offset = ctx->history_index + ctx->history_size - x_max;
1046         }
1047         else /* window is larger than history */
1048         {
1049                 if (ctx->history_index != ctx->history_size) /* no longer growing. */
1050                         history_offset = ctx->history_index;
1051                 else /* start-up */
1052                         history_offset = 0;
1053         }
1054
1055         for (x = 0; x < x_max; x++)
1056         {
1057                 size_t index;
1058                 double latency;
1059
1060                 int color = OPING_RED;
1061                 char const *symbol = "!";
1062                 int symbolc = '!';
1063
1064                 if (x >= ctx->history_size)
1065                 {
1066                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
1067                         continue;
1068                 }
1069
1070                 index = (history_offset + x) % ctx->history_size;
1071                 latency = ctx->history_by_time[index];
1072
1073                 if (latency < 0) {
1074                         continue;
1075                 }
1076
1077                 if (latency >= 0.0)
1078                 {
1079                         double ratio;
1080
1081                         size_t symbols_num = hist_symbols_acs_num;
1082                         size_t colors_num = 1;
1083
1084                         size_t index_symbols;
1085                         size_t index_colors;
1086                         size_t intensity;
1087
1088                         /* latency is in milliseconds, opt_interval is in seconds. */
1089                         ratio = (latency * 0.001) / opt_interval;
1090                         if (ratio > 1) {
1091                                 ratio = 1.0;
1092                         }
1093
1094                         if (has_utf8 ())
1095                                 symbols_num = hist_symbols_utf8_num;
1096
1097                         if (has_colors () == TRUE)
1098                                 colors_num = hist_colors_num;
1099
1100                         intensity = (size_t) (ratio * ((double) (symbols_num * colors_num)));
1101                         if (intensity >= (symbols_num * colors_num))
1102                                 intensity = (symbols_num * colors_num) - 1;
1103
1104                         index_symbols = intensity % symbols_num;
1105                         assert (index_symbols < symbols_num);
1106
1107                         index_colors = intensity / symbols_num;
1108                         assert (index_colors < colors_num);
1109
1110                         if (has_utf8())
1111                         {
1112                                 color = hist_colors_utf8[index_colors];
1113                                 symbol = hist_symbols_utf8[index_symbols];
1114                         }
1115                         else
1116                         {
1117                                 color = hist_colors_acs[index_colors];
1118                                 symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
1119                         }
1120                 }
1121                 else /* if (!(latency >= 0.0)) */
1122                         wattron (ctx->window, A_BOLD);
1123
1124                 if (has_colors () == TRUE)
1125                         wattron (ctx->window, COLOR_PAIR(color));
1126
1127                 if (has_utf8())
1128                         mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, symbol);
1129                 else
1130                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, symbolc);
1131
1132                 if (has_colors () == TRUE)
1133                         wattroff (ctx->window, COLOR_PAIR(color));
1134
1135                 /* Use negation here to handle NaN correctly. */
1136                 if (!(latency >= 0.0))
1137                         wattroff (ctx->window, A_BOLD);
1138         } /* for (x) */
1139
1140         return (0);
1141 } /* }}} int update_graph_prettyping */
1142
1143 static int update_graph_histogram (ping_context_t *ctx) /* {{{ */
1144 {
1145         uint32_t *counters;
1146         uint32_t *accumulated;
1147         uint32_t max;
1148         size_t i;
1149         size_t x_max;
1150         size_t x;
1151
1152         size_t symbols_num = hist_symbols_acs_num;
1153
1154         clean_history (ctx);
1155
1156         if (ctx->history_received == 0)
1157                 return (ENOENT);
1158
1159         if (has_utf8 ())
1160                 symbols_num = hist_symbols_utf8_num;
1161
1162         x_max = (size_t) getmaxx (ctx->window);
1163         if (x_max <= 4)
1164                 return (EINVAL);
1165         x_max -= 4;
1166
1167         counters = calloc (x_max, sizeof (*counters));
1168         accumulated = calloc (x_max, sizeof (*accumulated));
1169
1170         /* Bucketize */
1171         max = 0;
1172         for (i = 0; i < ctx->history_received; i++)
1173         {
1174                 double latency = ctx->history_by_value[i] / 1000.0;
1175                 size_t index = (size_t) (((double) x_max) * latency / opt_interval);
1176
1177                 if (index >= x_max)
1178                         index = x_max - 1;
1179
1180                 counters[index]++;
1181                 if (max < counters[index])
1182                         max = counters[index];
1183         }
1184
1185         /* Sum */
1186         accumulated[0] = counters[0];
1187         for (x = 1; x < x_max; x++)
1188                 accumulated[x] = counters[x] + accumulated[x - 1];
1189
1190         /* Calculate ratios */
1191         for (x = 0; x < x_max; x++)
1192         {
1193                 double height = ((double) counters[x]) / ((double) max);
1194                 double ratio_this = ((double) accumulated[x]) / ((double) ctx->history_received);
1195                 double ratio_prev = 0.0;
1196                 size_t index;
1197                 int color = 0;
1198
1199                 index = (size_t) (height * ((double) symbols_num));
1200                 if (index >= symbols_num)
1201                         index = symbols_num - 1;
1202
1203                 if (x > 0)
1204                         ratio_prev = ((double) accumulated[x - 1]) / ((double) ctx->history_received);
1205
1206                 if (has_colors () == TRUE)
1207                 {
1208                         if ((ratio_this <= threshold_green)
1209                                         || ((ratio_prev < threshold_green)
1210                                                 && (ratio_this > threshold_green)))
1211                                 color = OPING_GREEN;
1212                         else if ((ratio_this <= threshold_yellow)
1213                                         || ((ratio_prev < threshold_yellow)
1214                                                 && (ratio_this > threshold_yellow)))
1215                                 color = OPING_YELLOW;
1216                         else
1217                                 color = OPING_RED;
1218
1219                         wattron (ctx->window, COLOR_PAIR(color));
1220                 }
1221
1222                 if (counters[x] == 0)
1223                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
1224                 else if (has_utf8 ())
1225                         mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2,
1226                                         hist_symbols_utf8[index]);
1227                 else
1228                         mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2,
1229                                         hist_symbols_acs[index] | A_ALTCHARSET);
1230
1231                 if (has_colors () == TRUE)
1232                         wattroff (ctx->window, COLOR_PAIR(color));
1233
1234         }
1235
1236         free (accumulated);
1237         return (0);
1238 } /* }}} int update_graph_histogram */
1239
1240 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
1241 {
1242         double latency = -1.0;
1243         size_t buffer_len = sizeof (latency);
1244
1245         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1246                         &latency, &buffer_len);
1247
1248         if ((ctx == NULL) || (ctx->window == NULL))
1249                 return (EINVAL);
1250
1251         /* werase (ctx->window); */
1252
1253         box (ctx->window, 0, 0);
1254         wattron (ctx->window, A_BOLD);
1255         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
1256                         " %s ", ctx->host);
1257         wattroff (ctx->window, A_BOLD);
1258         wprintw (ctx->window, "ping statistics ");
1259         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
1260                         "%i packets transmitted, %i received, %.2f%% packet "
1261                         "loss, time %.1fms",
1262                         ctx->req_sent, ctx->req_rcvd,
1263                         context_get_packet_loss (ctx),
1264                         ctx->latency_total);
1265         if (ctx->req_rcvd != 0)
1266         {
1267                 double min;
1268                 double median;
1269                 double max;
1270                 double percentile;
1271
1272                 min = percentile_to_latency (ctx, 0.0);
1273                 median = percentile_to_latency (ctx, 50.0);
1274                 max = percentile_to_latency (ctx, 100.0);
1275                 percentile = percentile_to_latency (ctx, opt_percentile);
1276
1277                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
1278                                 "RTT[ms]: min = %.0f, median = %.0f, p(%.0f) = %.0f, max = %.0f  ",
1279                                 min, median, opt_percentile, percentile, max);
1280         }
1281
1282         if (opt_show_graph == 1)
1283                 update_graph_prettyping (ctx, latency);
1284         else if (opt_show_graph == 2)
1285                 update_graph_histogram (ctx);
1286         else if (opt_show_graph == 3)
1287                 update_graph_boxplot (ctx);
1288
1289         wrefresh (ctx->window);
1290
1291         return (0);
1292 } /* }}} int update_stats_from_context */
1293
1294 static int on_resize (pingobj_t *ping) /* {{{ */
1295 {
1296         pingobj_iter_t *iter;
1297         int width = 0;
1298         int height = 0;
1299         int main_win_height;
1300         int box_height = (opt_show_graph == 0) ? 4 : 5;
1301
1302         getmaxyx (stdscr, height, width);
1303         if ((height < 1) || (width < 1))
1304                 return (EINVAL);
1305
1306         main_win_height = height - (box_height * host_num);
1307         wresize (main_win, main_win_height, /* width = */ width);
1308         /* Allow scrolling */
1309         scrollok (main_win, TRUE);
1310         /* wsetscrreg (main_win, 0, main_win_height - 1); */
1311         /* Allow hardware accelerated scrolling. */
1312         idlok (main_win, TRUE);
1313         wrefresh (main_win);
1314
1315         for (iter = ping_iterator_get (ping);
1316                         iter != NULL;
1317                         iter = ping_iterator_next (iter))
1318         {
1319                 ping_context_t *context;
1320
1321                 context = ping_iterator_get_context (iter);
1322                 if (context == NULL)
1323                         continue;
1324
1325                 if (context->window != NULL)
1326                 {
1327                         werase (context->window);
1328                         wrefresh (context->window);
1329                         delwin (context->window);
1330                         context->window = NULL;
1331                 }
1332                 context->window = newwin (/* height = */ box_height,
1333                                 /* width = */ width,
1334                                 /* y = */ main_win_height + (box_height * context->index),
1335                                 /* x = */ 0);
1336         }
1337
1338         return (0);
1339 } /* }}} */
1340
1341 static int check_resize (pingobj_t *ping) /* {{{ */
1342 {
1343         int need_resize = 0;
1344
1345         while (42)
1346         {
1347                 int key = wgetch (stdscr);
1348                 if (key == ERR)
1349                         break;
1350                 else if (key == KEY_RESIZE)
1351                         need_resize = 1;
1352                 else if (key == 'g')
1353                 {
1354                         if (opt_show_graph == 3)
1355                                 opt_show_graph = 1;
1356                         else if (opt_show_graph > 0)
1357                                 opt_show_graph++;
1358                 }
1359                 else if (key == 'a')
1360                 {
1361                         char host[NI_MAXHOST];
1362
1363                         wprintw (main_win, "New Host: ");
1364                         echo ();
1365                         wgetnstr (main_win, host, sizeof (host));
1366                         noecho ();
1367
1368                         if (ping_host_add(ping, host) < 0)
1369                         {
1370                                 const char *errmsg = ping_get_error (ping);
1371
1372                                 wprintw (main_win, "Adding host `%s' failed: %s\n", host, errmsg);
1373                         }
1374                         else
1375                         {
1376                                 /* FIXME - scroll main_win correctly so that old
1377                                  * data is still visible */
1378                                 need_resize = 1;
1379                                 host_num = ping_iterator_count(ping);
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                 use_default_colors ();
1412                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ -1);
1413                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ -1);
1414                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ -1);
1415                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  -1);
1416                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
1417                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
1418         }
1419
1420         main_win_height = height - (box_height * host_num);
1421         main_win = newwin (/* height = */ main_win_height,
1422                         /* width = */ width,
1423                         /* y = */ 0, /* x = */ 0);
1424         /* Allow scrolling */
1425         scrollok (main_win, TRUE);
1426         /* wsetscrreg (main_win, 0, main_win_height - 1); */
1427         /* Allow hardware accelerated scrolling. */
1428         idlok (main_win, TRUE);
1429         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
1430         wrefresh (main_win);
1431
1432         for (iter = ping_iterator_get (ping);
1433                         iter != NULL;
1434                         iter = ping_iterator_next (iter))
1435         {
1436                 ping_context_t *context;
1437
1438                 context = ping_iterator_get_context (iter);
1439                 if (context == NULL)
1440                         continue;
1441
1442                 if (context->window != NULL)
1443                 {
1444                         delwin (context->window);
1445                         context->window = NULL;
1446                 }
1447                 context->window = newwin (/* height = */ box_height,
1448                                 /* width = */ width,
1449                                 /* y = */ main_win_height + (box_height * context->index),
1450                                 /* x = */ 0);
1451         }
1452
1453
1454         /* Don't know what good this does exactly, but without this code
1455          * "check_resize" will be called right after startup and *somehow*
1456          * this leads to display errors. If we purge all initial characters
1457          * here, the problem goes away. "wgetch" is non-blocking due to
1458          * "nodelay" (see above). */
1459         while (wgetch (stdscr) != ERR)
1460         {
1461                 /* eat up characters */;
1462         }
1463
1464         return (0);
1465 } /* }}} int pre_loop_hook */
1466
1467 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
1468 {
1469         return (check_resize (ping));
1470 } /* }}} int pre_sleep_hook */
1471
1472 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
1473 {
1474         return (check_resize (ping));
1475 } /* }}} int pre_sleep_hook */
1476 #else /* if !USE_NCURSES */
1477 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
1478 {
1479         pingobj_iter_t *iter;
1480
1481         for (iter = ping_iterator_get (ping);
1482                         iter != NULL;
1483                         iter = ping_iterator_next (iter))
1484         {
1485                 ping_context_t *ctx;
1486                 size_t buffer_size;
1487
1488                 ctx = ping_iterator_get_context (iter);
1489                 if (ctx == NULL)
1490                         continue;
1491
1492                 buffer_size = 0;
1493                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
1494
1495                 printf ("PING %s (%s) %zu bytes of data.\n",
1496                                 ctx->host, ctx->addr, buffer_size);
1497         }
1498
1499         return (0);
1500 } /* }}} int pre_loop_hook */
1501
1502 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1503 {
1504         fflush (stdout);
1505
1506         return (0);
1507 } /* }}} int pre_sleep_hook */
1508
1509 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1510 {
1511         return (0);
1512 } /* }}} int post_sleep_hook */
1513 #endif
1514
1515 static void update_context (ping_context_t *ctx, double latency) /* {{{ */
1516 {
1517         ctx->req_sent++;
1518
1519         if (latency > 0.0)
1520         {
1521                 ctx->req_rcvd++;
1522                 ctx->latency_total += latency;
1523         }
1524         else
1525         {
1526                 latency = NAN;
1527         }
1528
1529         ctx->history_by_time[ctx->history_index] = latency;
1530
1531         ctx->history_dirty = 1;
1532
1533         /* Update index and size. */
1534         ctx->history_index = (ctx->history_index + 1) % HISTORY_SIZE_MAX;
1535         if (ctx->history_size < HISTORY_SIZE_MAX)
1536                 ctx->history_size++;
1537 } /* }}} void update_context */
1538
1539 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
1540                 __attribute__((unused)) int index)
1541 {
1542         double          latency;
1543         unsigned int    sequence;
1544         int             recv_ttl;
1545         uint8_t         recv_qos;
1546         char            recv_qos_str[16];
1547         size_t          buffer_len;
1548         size_t          data_len;
1549         ping_context_t *context;
1550
1551         latency = -1.0;
1552         buffer_len = sizeof (latency);
1553         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1554                         &latency, &buffer_len);
1555
1556         sequence = 0;
1557         buffer_len = sizeof (sequence);
1558         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
1559                         &sequence, &buffer_len);
1560
1561         recv_ttl = -1;
1562         buffer_len = sizeof (recv_ttl);
1563         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
1564                         &recv_ttl, &buffer_len);
1565
1566         recv_qos = 0;
1567         buffer_len = sizeof (recv_qos);
1568         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1569                         &recv_qos, &buffer_len);
1570
1571         data_len = 0;
1572         ping_iterator_get_info (iter, PING_INFO_DATA,
1573                         NULL, &data_len);
1574
1575         context = (ping_context_t *) ping_iterator_get_context (iter);
1576
1577 #if USE_NCURSES
1578 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1579 #else
1580 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1581 #endif
1582
1583         update_context (context, latency);
1584
1585         if (latency > 0.0)
1586         {
1587 #if USE_NCURSES
1588                 if (has_colors () == TRUE)
1589                 {
1590                         double ratio;
1591                         int color = OPING_GREEN;
1592
1593                         ratio = latency_to_ratio (context, latency);
1594                         if (ratio < threshold_green)
1595                                 color = OPING_GREEN;
1596                         else if (ratio < threshold_yellow)
1597                                 color = OPING_YELLOW;
1598                         else
1599                                 color = OPING_RED;
1600
1601                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1602                                         data_len, context->host, context->addr,
1603                                         sequence, recv_ttl,
1604                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1605                         if ((recv_qos != 0) || (opt_send_qos != 0))
1606                         {
1607                                 HOST_PRINTF ("qos=%s ",
1608                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1609                         }
1610                         HOST_PRINTF ("time=");
1611                         wattron (main_win, COLOR_PAIR(color));
1612                         HOST_PRINTF ("%.2f", latency);
1613                         wattroff (main_win, COLOR_PAIR(color));
1614                         HOST_PRINTF (" ms\n");
1615                 }
1616                 else
1617                 {
1618 #endif
1619                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1620                                 data_len,
1621                                 context->host, context->addr,
1622                                 sequence, recv_ttl);
1623                 if ((recv_qos != 0) || (opt_send_qos != 0))
1624                 {
1625                         HOST_PRINTF ("qos=%s ",
1626                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1627                 }
1628                 HOST_PRINTF ("time=%.2f ms\n", latency);
1629 #if USE_NCURSES
1630                 }
1631 #endif
1632                 if (opt_bell) {
1633 #if USE_NCURSES
1634                         beep();
1635 #else
1636                         HOST_PRINTF ("\a");
1637 #endif
1638                 }
1639         }
1640         else /* if (!(latency > 0.0)) */
1641         {
1642 #if USE_NCURSES
1643                 if (has_colors () == TRUE)
1644                 {
1645                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1646                                         context->host, context->addr,
1647                                         sequence);
1648                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1649                         HOST_PRINTF ("timeout");
1650                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1651                         HOST_PRINTF ("\n");
1652                 }
1653                 else
1654                 {
1655 #endif
1656                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1657                                 context->host, context->addr,
1658                                 sequence);
1659 #if USE_NCURSES
1660                 }
1661 #endif
1662         }
1663
1664         if (outfile != NULL)
1665         {
1666                 struct timeval tv = {0};
1667                 if (gettimeofday (&tv, NULL) == 0)
1668                 {
1669                         double t = ((double) tv.tv_sec) + (((double) tv.tv_usec) / 1000000.0);
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 : */