src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #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 static char const * const hist_symbols_utf8[] = {
  99         "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
 100 static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8)
 101         / sizeof (hist_symbols_utf8[0]);
 102
 103 /* scancodes for 6 levels of horizontal bars, ncurses-specific */
 104 /* those are not the usual constants because those are not constant */
 105 static int const hist_symbols_acs[] = {
 106         115, /* ACS_S9 "⎽" */
 107         114, /* ACS_S7 "⎼" */
 108         113, /* ACS_S5 "─" */
 109         112, /* ACS_S3 "⎻" */
 110         111  /* ACS_S1 "⎺" */
 111 };
 112 static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs)
 113         / sizeof (hist_symbols_acs[0]);
 114
 115 /* use different colors without a background for scancodes */
 116 static int const hist_colors_utf8[] = {
 117         OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST };
 118 static int const hist_colors_acs[] = {
 119         OPING_GREEN, OPING_YELLOW, OPING_RED };
 120 /* assuming that both arrays are the same size */
 121 static size_t const hist_colors_num = sizeof (hist_colors_utf8)
 122         / sizeof (hist_colors_utf8[0]);
 123 #endif
 124
 125 #include "oping.h"
 126
 127 #ifndef _POSIX_SAVED_IDS
 128 # define _POSIX_SAVED_IDS 0
 129 #endif
 130
 131 /* Remove GNU specific __attribute__ settings when using another compiler */
 132 #if !__GNUC__
 133 # define __attribute__(x) /**/
 134 #endif
 135
 136 typedef struct ping_context
 137 {
 138         char host[NI_MAXHOST];
 139         char addr[NI_MAXHOST];
 140
 141         int index;
 142         int req_sent;
 143         int req_rcvd;
 144
 145         double latency_min;
 146         double latency_max;
 147         double latency_total;
 148         double latency_total_square;
 149
 150 #if USE_NCURSES
 151         WINDOW *window;
 152 #endif
 153 } ping_context_t;
 154
 155 static double  opt_interval   = 1.0;
 156 static int     opt_addrfamily = PING_DEF_AF;
 157 static char   *opt_srcaddr    = NULL;
 158 static char   *opt_device     = NULL;
 159 static char   *opt_filename   = NULL;
 160 static int     opt_count      = -1;
 161 static int     opt_send_ttl   = 64;
 162 static uint8_t opt_send_qos   = 0;
 163 #if USE_NCURSES
 164 static int     opt_utf8       = 0;
 165 #endif
 166
 167 static int host_num = 0;
 168
 169 #if USE_NCURSES
 170 static WINDOW *main_win = NULL;
 171 #endif
 172
 173 static void sigint_handler (int signal) /* {{{ */
 174 {
 175         /* Make compiler happy */
 176         signal = 0;
 177         /* Exit the loop */
 178         opt_count = 0;
 179 } /* }}} void sigint_handler */
 180
 181 static ping_context_t *context_create (void) /* {{{ */
 182 {
 183         ping_context_t *ret;
 184
 185         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 186                 return (NULL);
 187
 188         memset (ret, '\0', sizeof (ping_context_t));
 189
 190         ret->latency_min   = -1.0;
 191         ret->latency_max   = -1.0;
 192         ret->latency_total = 0.0;
 193         ret->latency_total_square = 0.0;
 194
 195 #if USE_NCURSES
 196         ret->window = NULL;
 197 #endif
 198
 199         return (ret);
 200 } /* }}} ping_context_t *context_create */
 201
 202 static void context_destroy (ping_context_t *context) /* {{{ */
 203 {
 204         if (context == NULL)
 205                 return;
 206
 207 #if USE_NCURSES
 208         if (context->window != NULL)
 209         {
 210                 delwin (context->window);
 211                 context->window = NULL;
 212         }
 213 #endif
 214
 215         free (context);
 216 } /* }}} void context_destroy */
 217
 218 static double context_get_average (ping_context_t *ctx) /* {{{ */
 219 {
 220         double num_total;
 221
 222         if (ctx == NULL)
 223                 return (-1.0);
 224
 225         if (ctx->req_rcvd < 1)
 226                 return (-0.0);
 227
 228         num_total = (double) ctx->req_rcvd;
 229         return (ctx->latency_total / num_total);
 230 } /* }}} double context_get_average */
 231
 232 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 233 {
 234         double num_total;
 235
 236         if (ctx == NULL)
 237                 return (-1.0);
 238
 239         if (ctx->req_rcvd < 1)
 240                 return (-0.0);
 241         else if (ctx->req_rcvd < 2)
 242                 return (0.0);
 243
 244         num_total = (double) ctx->req_rcvd;
 245         return (sqrt (((num_total * ctx->latency_total_square)
 246                                         - (ctx->latency_total * ctx->latency_total))
 247                                 / (num_total * (num_total - 1.0))));
 248 } /* }}} double context_get_stddev */
 249
 250 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 251 {
 252         if (ctx == NULL)
 253                 return (-1.0);
 254
 255         if (ctx->req_sent < 1)
 256                 return (0.0);
 257
 258         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 259                         / ((double) ctx->req_sent));
 260 } /* }}} double context_get_packet_loss */
 261
 262 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 263 {
 264         pingobj_iter_t *iter;
 265         int index;
 266
 267         if (ping == NULL)
 268                 return (EINVAL);
 269
 270         index = 0;
 271         for (iter = ping_iterator_get (ping);
 272                         iter != NULL;
 273                         iter = ping_iterator_next (iter))
 274         {
 275                 ping_context_t *context;
 276                 size_t buffer_size;
 277
 278                 context = context_create ();
 279                 context->index = index;
 280
 281                 buffer_size = sizeof (context->host);
 282                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 283
 284                 buffer_size = sizeof (context->addr);
 285                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 286
 287                 ping_iterator_set_context (iter, (void *) context);
 288
 289                 index++;
 290         }
 291
 292         return (0);
 293 } /* }}} int ping_initialize_contexts */
 294
 295 static void usage_exit (const char *name, int status) /* {{{ */
 296 {
 297         fprintf (stderr, "Usage: %s [OPTIONS] "
 298                                 "-f filename | host [host [host ...]]\n"
 299
 300                         "\nAvailable options:\n"
 301                         "  -4|-6        force the use of IPv4 or IPv6\n"
 302                         "  -c count     number of ICMP packets to send\n"
 303                         "  -i interval  interval with which to send ICMP packets\n"
 304                         "  -t ttl       time to live for each ICMP packet\n"
 305                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 306                         "               Use \"-Q help\" for a list of valid options.\n"
 307                         "  -I srcaddr   source address\n"
 308                         "  -D device    outgoing interface name\n"
 309                         "  -f filename  filename to read hosts from\n"
 310 #if USE_NCURSES
 311                         "  -u / -U      force / disable UTF-8 output\n"
 312 #endif
 313
 314                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 315                         "by Florian octo Forster <octo@verplant.org>\n"
 316                         "for contributions see `AUTHORS'\n",
 317                         name);
 318         exit (status);
 319 } /* }}} void usage_exit */
 320
 321 __attribute__((noreturn))
 322 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 323 {
 324         if (arg != 0)
 325                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 326
 327         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 328                         "\n"
 329                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 330                         "\n"
 331                         "    be                     Best Effort (BE, default PHB).\n"
 332                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 333                         "                           (low delay, low loss, low jitter)\n"
 334                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 335                         "                           (capacity-admitted traffic)\n"
 336                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 337                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 338                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 339                         "                           For example: \"cs1\" (priority traffic)\n"
 340                         "\n"
 341                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 342                         "\n"
 343                         "    lowdelay     (%#04x)    minimize delay\n"
 344                         "    throughput   (%#04x)    maximize throughput\n"
 345                         "    reliability  (%#04x)    maximize reliability\n"
 346                         "    mincost      (%#04x)    minimize monetary cost\n"
 347                         "\n"
 348                         "  Specify manually\n"
 349                         "\n"
 350                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 351                         "       0 -  255            Decimal numeric specification.\n"
 352                         "\n",
 353                         (unsigned int) IPTOS_LOWDELAY,
 354                         (unsigned int) IPTOS_THROUGHPUT,
 355                         (unsigned int) IPTOS_RELIABILITY,
 356                         (unsigned int) IPTOS_MINCOST);
 357
 358         exit (status);
 359 } /* }}} void usage_qos_exit */
 360
 361 static int set_opt_send_qos (const char *opt) /* {{{ */
 362 {
 363         if (opt == NULL)
 364                 return (EINVAL);
 365
 366         if (strcasecmp ("help", opt) == 0)
 367                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 368         /* DiffServ (RFC 2474): */
 369         /* - Best effort (BE) */
 370         else if (strcasecmp ("be", opt) == 0)
 371                 opt_send_qos = 0;
 372         /* - Expedited Forwarding (EF, RFC 3246) */
 373         else if (strcasecmp ("ef", opt) == 0)
 374                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 375         /* - Voice Admit (VA, RFC 5865) */
 376         else if (strcasecmp ("va", opt) == 0)
 377                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 378         /* - Assured Forwarding (AF, RFC 2597) */
 379         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 380                         && (strlen (opt) == 4))
 381         {
 382                 uint8_t dscp;
 383                 uint8_t class = 0;
 384                 uint8_t prec = 0;
 385
 386                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 387                 if (opt[2] == '1')
 388                         class = 1;
 389                 else if (opt[2] == '2')
 390                         class = 2;
 391                 else if (opt[2] == '3')
 392                         class = 3;
 393                 else if (opt[2] == '4')
 394                         class = 4;
 395                 else
 396                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 397
 398                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 399                 if (opt[3] == '1')
 400                         prec = 1;
 401                 else if (opt[3] == '2')
 402                         prec = 2;
 403                 else if (opt[3] == '3')
 404                         prec = 3;
 405                 else
 406                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 407
 408                 dscp = (8 * class) + (2 * prec);
 409                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 410                 opt_send_qos = dscp << 2;
 411         }
 412         /* - Class Selector (CS) */
 413         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 414                         && (strlen (opt) == 3))
 415         {
 416                 uint8_t class;
 417
 418                 if ((opt[2] < '0') || (opt[2] > '7'))
 419                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 420
 421                 /* Not exactly legal by the C standard, but I don't know of any
 422                  * system not supporting this hack. */
 423                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 424                 opt_send_qos = class << 5;
 425         }
 426         /* Type of Service (RFC 1349) */
 427         else if (strcasecmp ("lowdelay", opt) == 0)
 428                 opt_send_qos = IPTOS_LOWDELAY;
 429         else if (strcasecmp ("throughput", opt) == 0)
 430                 opt_send_qos = IPTOS_THROUGHPUT;
 431         else if (strcasecmp ("reliability", opt) == 0)
 432                 opt_send_qos = IPTOS_RELIABILITY;
 433         else if (strcasecmp ("mincost", opt) == 0)
 434                 opt_send_qos = IPTOS_MINCOST;
 435         /* Numeric value */
 436         else
 437         {
 438                 unsigned long value;
 439                 char *endptr;
 440
 441                 errno = 0;
 442                 endptr = NULL;
 443                 value = strtoul (opt, &endptr, /* base = */ 0);
 444                 if ((errno != 0) || (endptr == opt)
 445                                 || (endptr == NULL) || (*endptr != 0)
 446                                 || (value > 0xff))
 447                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 448
 449                 opt_send_qos = (uint8_t) value;
 450         }
 451
 452         return (0);
 453 } /* }}} int set_opt_send_qos */
 454
 455 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 456 {
 457         uint8_t dscp;
 458         uint8_t ecn;
 459         char *dscp_str;
 460         char *ecn_str;
 461
 462         dscp = qos >> 2;
 463         ecn = qos & 0x03;
 464
 465         switch (dscp)
 466         {
 467                 case 0x00: dscp_str = "be";  break;
 468                 case 0x2e: dscp_str = "ef";  break;
 469                 case 0x2d: dscp_str = "va";  break;
 470                 case 0x0a: dscp_str = "af11"; break;
 471                 case 0x0c: dscp_str = "af12"; break;
 472                 case 0x0e: dscp_str = "af13"; break;
 473                 case 0x12: dscp_str = "af21"; break;
 474                 case 0x14: dscp_str = "af22"; break;
 475                 case 0x16: dscp_str = "af23"; break;
 476                 case 0x1a: dscp_str = "af31"; break;
 477                 case 0x1c: dscp_str = "af32"; break;
 478                 case 0x1e: dscp_str = "af33"; break;
 479                 case 0x22: dscp_str = "af41"; break;
 480                 case 0x24: dscp_str = "af42"; break;
 481                 case 0x26: dscp_str = "af43"; break;
 482                 case 0x08: dscp_str = "cs1";  break;
 483                 case 0x10: dscp_str = "cs2";  break;
 484                 case 0x18: dscp_str = "cs3";  break;
 485                 case 0x20: dscp_str = "cs4";  break;
 486                 case 0x28: dscp_str = "cs5";  break;
 487                 case 0x30: dscp_str = "cs6";  break;
 488                 case 0x38: dscp_str = "cs7";  break;
 489                 default:   dscp_str = NULL;
 490         }
 491
 492         switch (ecn)
 493         {
 494                 case 0x01: ecn_str = ",ecn(1)"; break;
 495                 case 0x02: ecn_str = ",ecn(0)"; break;
 496                 case 0x03: ecn_str = ",ce"; break;
 497                 default:   ecn_str = "";
 498         }
 499
 500         if (dscp_str == NULL)
 501                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 502         else
 503                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 504         buffer[buffer_size - 1] = 0;
 505
 506         return (buffer);
 507 } /* }}} char *format_qos */
 508
 509 static int read_options (int argc, char **argv) /* {{{ */
 510 {
 511         int optchar;
 512
 513         while (1)
 514         {
 515                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:"
 516 #if USE_NCURSES
 517                                 "uU"
 518 #endif
 519                                 );
 520
 521                 if (optchar == -1)
 522                         break;
 523
 524                 switch (optchar)
 525                 {
 526                         case '4':
 527                         case '6':
 528                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 529                                 break;
 530
 531                         case 'c':
 532                                 {
 533                                         int new_count;
 534                                         new_count = atoi (optarg);
 535                                         if (new_count > 0)
 536                                                 opt_count = new_count;
 537                                         else
 538                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 539                                                                 optarg);
 540                                 }
 541                                 break;
 542
 543                         case 'f':
 544                                 {
 545                                         if (opt_filename != NULL)
 546                                                 free (opt_filename);
 547                                         opt_filename = strdup (optarg);
 548                                 }
 549                                 break;
 550
 551                         case 'i':
 552                                 {
 553                                         double new_interval;
 554                                         new_interval = atof (optarg);
 555                                         if (new_interval < 0.001)
 556                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 557                                                                 optarg);
 558                                         else
 559                                                 opt_interval = new_interval;
 560                                 }
 561                                 break;
 562                         case 'I':
 563                                 {
 564                                         if (opt_srcaddr != NULL)
 565                                                 free (opt_srcaddr);
 566                                         opt_srcaddr = strdup (optarg);
 567                                 }
 568                                 break;
 569
 570                         case 'D':
 571                                 opt_device = optarg;
 572                                 break;
 573
 574                         case 't':
 575                         {
 576                                 int new_send_ttl;
 577                                 new_send_ttl = atoi (optarg);
 578                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 579                                         opt_send_ttl = new_send_ttl;
 580                                 else
 581                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 582                                                         optarg);
 583                                 break;
 584                         }
 585
 586                         case 'Q':
 587                                 set_opt_send_qos (optarg);
 588                                 break;
 589
 590 #if USE_NCURSES
 591                         case 'u':
 592                                 opt_utf8 = 2;
 593                                 break;
 594                         case 'U':
 595                                 opt_utf8 = 1;
 596                                 break;
 597 #endif
 598
 599                         case 'h':
 600                                 usage_exit (argv[0], 0);
 601                                 break;
 602                         default:
 603                                 usage_exit (argv[0], 1);
 604                 }
 605         }
 606
 607         return (optind);
 608 } /* }}} read_options */
 609
 610 static void time_normalize (struct timespec *ts) /* {{{ */
 611 {
 612         while (ts->tv_nsec < 0)
 613         {
 614                 if (ts->tv_sec == 0)
 615                 {
 616                         ts->tv_nsec = 0;
 617                         return;
 618                 }
 619
 620                 ts->tv_sec  -= 1;
 621                 ts->tv_nsec += 1000000000;
 622         }
 623
 624         while (ts->tv_nsec >= 1000000000)
 625         {
 626                 ts->tv_sec  += 1;
 627                 ts->tv_nsec -= 1000000000;
 628         }
 629 } /* }}} void time_normalize */
 630
 631 static void time_calc (struct timespec *ts_dest, /* {{{ */
 632                 const struct timespec *ts_int,
 633                 const struct timeval  *tv_begin,
 634                 const struct timeval  *tv_end)
 635 {
 636         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 637         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 638         time_normalize (ts_dest);
 639
 640         /* Assure that `(begin + interval) > end'.
 641          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 642          * which may be `unsigned. *sigh* */
 643         if ((tv_end->tv_sec > ts_dest->tv_sec)
 644                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 645                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 646         {
 647                 ts_dest->tv_sec  = 0;
 648                 ts_dest->tv_nsec = 0;
 649                 return;
 650         }
 651
 652         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 653         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 654         time_normalize (ts_dest);
 655 } /* }}} void time_calc */
 656
 657 #if USE_NCURSES
 658 static _Bool has_utf8() /* {{{ */
 659 {
 660 # if HAVE_NCURSESW_NCURSES_H
 661         if (!opt_utf8)
 662         {
 663                 /* Automatically determine */
 664                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 665                         opt_utf8 = 2;
 666                 else
 667                         opt_utf8 = 1;
 668         }
 669         return ((_Bool) (opt_utf8 - 1));
 670 # else
 671         return (0);
 672 # endif
 673 } /* }}} _Bool has_utf8 */
 674
 675 static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
 676                 double latency, unsigned int sequence)
 677 {
 678         int color = OPING_RED;
 679         char const *symbol = "!";
 680         int symbolc = '!';
 681         size_t hist_symbols_num;
 682         size_t index_symbols;
 683
 684         int x_max;
 685         int x_pos;
 686
 687         x_max = getmaxx (ctx->window);
 688         x_pos = ((sequence - 1) % (x_max - 4)) + 2;
 689
 690         if (has_utf8())
 691         {
 692                 hist_symbols_num = hist_symbols_utf8_num;
 693         }
 694         else {
 695                 hist_symbols_num = hist_symbols_acs_num;
 696         }
 697
 698         if (latency >= 0.0)
 699         {
 700                 double ratio;
 701                 size_t intensity;
 702                 size_t index_colors;
 703
 704                 ratio = latency / PING_DEF_TTL;
 705                 if (ratio > 1) {
 706                         ratio = 1.0;
 707                 }
 708
 709                 intensity = (size_t) ((ratio * hist_symbols_num
 710                                         * hist_colors_num) - 1);
 711
 712                 index_colors = intensity / hist_symbols_num;
 713                 assert (index_colors < hist_colors_num);
 714
 715                 index_symbols = intensity % hist_symbols_num;
 716                 if (has_utf8())
 717                 {
 718                         color = hist_colors_utf8[index_colors];
 719                         symbol = hist_symbols_utf8[index_symbols];
 720                 }
 721                 else
 722                 {
 723                         color = hist_colors_acs[index_colors];
 724                         symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
 725                 }
 726         }
 727         else /* if (!(latency >= 0.0)) */
 728                 wattron (ctx->window, A_BOLD);
 729
 730         wattron (ctx->window, COLOR_PAIR(color));
 731         if (has_utf8())
 732         {
 733                 mvwprintw (ctx->window,
 734                            /* y = */ 3,
 735                            /* x = */ x_pos,
 736                            symbol);
 737         }
 738         else {
 739                 mvwaddch (ctx->window,
 740                           /* y = */ 3,
 741                           /* x = */ x_pos,
 742                           symbolc);
 743         }
 744         wattroff (ctx->window, COLOR_PAIR(color));
 745
 746         /* Use negation here to handle NaN correctly. */
 747         if (!(latency >= 0.0))
 748                 wattroff (ctx->window, A_BOLD);
 749
 750         wprintw (ctx->window, " ");
 751         return (0);
 752 } /* }}} int update_prettyping_graph */
 753
 754 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 755 {
 756         double latency = -1.0;
 757         size_t buffer_len = sizeof (latency);
 758
 759         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 760                         &latency, &buffer_len);
 761
 762         unsigned int sequence = 0;
 763         buffer_len = sizeof (sequence);
 764         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 765                         &sequence, &buffer_len);
 766
 767
 768         if ((ctx == NULL) || (ctx->window == NULL))
 769                 return (EINVAL);
 770
 771         /* werase (ctx->window); */
 772
 773         box (ctx->window, 0, 0);
 774         wattron (ctx->window, A_BOLD);
 775         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 776                         " %s ", ctx->host);
 777         wattroff (ctx->window, A_BOLD);
 778         wprintw (ctx->window, "ping statistics ");
 779         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 780                         "%i packets transmitted, %i received, %.2f%% packet "
 781                         "loss, time %.1fms",
 782                         ctx->req_sent, ctx->req_rcvd,
 783                         context_get_packet_loss (ctx),
 784                         ctx->latency_total);
 785         if (ctx->req_rcvd != 0)
 786         {
 787                 double average;
 788                 double deviation;
 789
 790                 average = context_get_average (ctx);
 791                 deviation = context_get_stddev (ctx);
 792
 793                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 794                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 795                                 ctx->latency_min,
 796                                 average,
 797                                 ctx->latency_max,
 798                                 deviation);
 799         }
 800
 801         if (has_colors () == TRUE)
 802                 update_prettyping_graph (ctx, latency, sequence);
 803
 804         wrefresh (ctx->window);
 805
 806         return (0);
 807 } /* }}} int update_stats_from_context */
 808
 809 static int on_resize (pingobj_t *ping) /* {{{ */
 810 {
 811         pingobj_iter_t *iter;
 812         int width = 0;
 813         int height = 0;
 814         int main_win_height;
 815
 816         getmaxyx (stdscr, height, width);
 817         if ((height < 1) || (width < 1))
 818                 return (EINVAL);
 819
 820         main_win_height = height - (5 * host_num);
 821         wresize (main_win, main_win_height, /* width = */ width);
 822         /* Allow scrolling */
 823         scrollok (main_win, TRUE);
 824         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 825         /* Allow hardware accelerated scrolling. */
 826         idlok (main_win, TRUE);
 827         wrefresh (main_win);
 828
 829         for (iter = ping_iterator_get (ping);
 830                         iter != NULL;
 831                         iter = ping_iterator_next (iter))
 832         {
 833                 ping_context_t *context;
 834
 835                 context = ping_iterator_get_context (iter);
 836                 if (context == NULL)
 837                         continue;
 838
 839                 if (context->window != NULL)
 840                 {
 841                         delwin (context->window);
 842                         context->window = NULL;
 843                 }
 844                 context->window = newwin (/* height = */ 5,
 845                                 /* width = */ width,
 846                                 /* y = */ main_win_height + (5 * context->index),
 847                                 /* x = */ 0);
 848         }
 849
 850         return (0);
 851 } /* }}} */
 852
 853 static int check_resize (pingobj_t *ping) /* {{{ */
 854 {
 855         int need_resize = 0;
 856
 857         while (42)
 858         {
 859                 int key = wgetch (stdscr);
 860                 if (key == ERR)
 861                         break;
 862                 else if (key == KEY_RESIZE)
 863                         need_resize = 1;
 864         }
 865
 866         if (need_resize)
 867                 return (on_resize (ping));
 868         else
 869                 return (0);
 870 } /* }}} int check_resize */
 871
 872 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 873 {
 874         pingobj_iter_t *iter;
 875         int width = 0;
 876         int height = 0;
 877         int main_win_height;
 878
 879         initscr ();
 880         cbreak ();
 881         noecho ();
 882         nodelay (stdscr, TRUE);
 883
 884         getmaxyx (stdscr, height, width);
 885         if ((height < 1) || (width < 1))
 886                 return (EINVAL);
 887
 888         if (has_colors () == TRUE)
 889         {
 890                 start_color ();
 891                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 892                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 893                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 894                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
 895                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
 896                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
 897         }
 898
 899         main_win_height = height - (5 * host_num);
 900         main_win = newwin (/* height = */ main_win_height,
 901                         /* width = */ width,
 902                         /* y = */ 0, /* x = */ 0);
 903         /* Allow scrolling */
 904         scrollok (main_win, TRUE);
 905         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 906         /* Allow hardware accelerated scrolling. */
 907         idlok (main_win, TRUE);
 908         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 909         wrefresh (main_win);
 910
 911         for (iter = ping_iterator_get (ping);
 912                         iter != NULL;
 913                         iter = ping_iterator_next (iter))
 914         {
 915                 ping_context_t *context;
 916
 917                 context = ping_iterator_get_context (iter);
 918                 if (context == NULL)
 919                         continue;
 920
 921                 if (context->window != NULL)
 922                 {
 923                         delwin (context->window);
 924                         context->window = NULL;
 925                 }
 926                 context->window = newwin (/* height = */ 5,
 927                                 /* width = */ width,
 928                                 /* y = */ main_win_height + (5 * context->index),
 929                                 /* x = */ 0);
 930         }
 931
 932
 933         /* Don't know what good this does exactly, but without this code
 934          * "check_resize" will be called right after startup and *somehow*
 935          * this leads to display errors. If we purge all initial characters
 936          * here, the problem goes away. "wgetch" is non-blocking due to
 937          * "nodelay" (see above). */
 938         while (wgetch (stdscr) != ERR)
 939         {
 940                 /* eat up characters */;
 941         }
 942
 943         return (0);
 944 } /* }}} int pre_loop_hook */
 945
 946 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 947 {
 948         return (check_resize (ping));
 949 } /* }}} int pre_sleep_hook */
 950
 951 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 952 {
 953         return (check_resize (ping));
 954 } /* }}} int pre_sleep_hook */
 955 #else /* if !USE_NCURSES */
 956 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 957 {
 958         pingobj_iter_t *iter;
 959
 960         for (iter = ping_iterator_get (ping);
 961                         iter != NULL;
 962                         iter = ping_iterator_next (iter))
 963         {
 964                 ping_context_t *ctx;
 965                 size_t buffer_size;
 966
 967                 ctx = ping_iterator_get_context (iter);
 968                 if (ctx == NULL)
 969                         continue;
 970
 971                 buffer_size = 0;
 972                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 973
 974                 printf ("PING %s (%s) %zu bytes of data.\n",
 975                                 ctx->host, ctx->addr, buffer_size);
 976         }
 977
 978         return (0);
 979 } /* }}} int pre_loop_hook */
 980
 981 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 982 {
 983         fflush (stdout);
 984
 985         return (0);
 986 } /* }}} int pre_sleep_hook */
 987
 988 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 989 {
 990         return (0);
 991 } /* }}} int post_sleep_hook */
 992 #endif
 993
 994 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 995                 __attribute__((unused)) int index)
 996 {
 997         double          latency;
 998         unsigned int    sequence;
 999         int             recv_ttl;
1000         uint8_t         recv_qos;
1001         char            recv_qos_str[16];
1002         size_t          buffer_len;
1003         size_t          data_len;
1004         ping_context_t *context;
1005
1006         latency = -1.0;
1007         buffer_len = sizeof (latency);
1008         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1009                         &latency, &buffer_len);
1010
1011         sequence = 0;
1012         buffer_len = sizeof (sequence);
1013         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
1014                         &sequence, &buffer_len);
1015
1016         recv_ttl = -1;
1017         buffer_len = sizeof (recv_ttl);
1018         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
1019                         &recv_ttl, &buffer_len);
1020
1021         recv_qos = 0;
1022         buffer_len = sizeof (recv_qos);
1023         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1024                         &recv_qos, &buffer_len);
1025
1026         data_len = 0;
1027         ping_iterator_get_info (iter, PING_INFO_DATA,
1028                         NULL, &data_len);
1029
1030         context = (ping_context_t *) ping_iterator_get_context (iter);
1031
1032 #if USE_NCURSES
1033 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1034 #else
1035 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1036 #endif
1037
1038         context->req_sent++;
1039         if (latency > 0.0)
1040         {
1041                 context->req_rcvd++;
1042                 context->latency_total += latency;
1043                 context->latency_total_square += (latency * latency);
1044
1045                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
1046                         context->latency_max = latency;
1047                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
1048                         context->latency_min = latency;
1049
1050 #if USE_NCURSES
1051                 if (has_colors () == TRUE)
1052                 {
1053                         int color = OPING_GREEN;
1054                         double average = context_get_average (context);
1055                         double stddev = context_get_stddev (context);
1056
1057                         if ((latency < (average - (2 * stddev)))
1058                                         || (latency > (average + (2 * stddev))))
1059                                 color = OPING_RED;
1060                         else if ((latency < (average - stddev))
1061                                         || (latency > (average + stddev)))
1062                                 color = OPING_YELLOW;
1063
1064                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1065                                         data_len, context->host, context->addr,
1066                                         sequence, recv_ttl,
1067                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1068                         if ((recv_qos != 0) || (opt_send_qos != 0))
1069                         {
1070                                 HOST_PRINTF ("qos=%s ",
1071                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1072                         }
1073                         HOST_PRINTF ("time=");
1074                         wattron (main_win, COLOR_PAIR(color));
1075                         HOST_PRINTF ("%.2f", latency);
1076                         wattroff (main_win, COLOR_PAIR(color));
1077                         HOST_PRINTF (" ms\n");
1078                 }
1079                 else
1080                 {
1081 #endif
1082                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1083                                 data_len,
1084                                 context->host, context->addr,
1085                                 sequence, recv_ttl);
1086                 if ((recv_qos != 0) || (opt_send_qos != 0))
1087                 {
1088                         HOST_PRINTF ("qos=%s ",
1089                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1090                 }
1091                 HOST_PRINTF ("time=%.2f ms\n", latency);
1092 #if USE_NCURSES
1093                 }
1094 #endif
1095         }
1096         else
1097         {
1098 #if USE_NCURSES
1099                 if (has_colors () == TRUE)
1100                 {
1101                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1102                                         context->host, context->addr,
1103                                         sequence);
1104                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1105                         HOST_PRINTF ("timeout");
1106                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1107                         HOST_PRINTF ("\n");
1108                 }
1109                 else
1110                 {
1111 #endif
1112                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1113                                 context->host, context->addr,
1114                                 sequence);
1115 #if USE_NCURSES
1116                 }
1117 #endif
1118         }
1119
1120 #if USE_NCURSES
1121         update_stats_from_context (context, iter);
1122         wrefresh (main_win);
1123 #endif
1124 } /* }}} void update_host_hook */
1125
1126 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1127 {
1128         pingobj_iter_t *iter;
1129
1130 #if USE_NCURSES
1131         endwin ();
1132 #endif
1133
1134         for (iter = ping_iterator_get (ping);
1135                         iter != NULL;
1136                         iter = ping_iterator_next (iter))
1137         {
1138                 ping_context_t *context;
1139
1140                 context = ping_iterator_get_context (iter);
1141
1142                 printf ("\n--- %s ping statistics ---\n"
1143                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1144                                 context->host, context->req_sent, context->req_rcvd,
1145                                 context_get_packet_loss (context),
1146                                 context->latency_total);
1147
1148                 if (context->req_rcvd != 0)
1149                 {
1150                         double average;
1151                         double deviation;
1152
1153                         average = context_get_average (context);
1154                         deviation = context_get_stddev (context);
1155
1156                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1157                                         context->latency_min,
1158                                         average,
1159                                         context->latency_max,
1160                                         deviation);
1161                 }
1162
1163                 ping_iterator_set_context (iter, NULL);
1164                 context_destroy (context);
1165         }
1166
1167         return (0);
1168 } /* }}} int post_loop_hook */
1169
1170 int main (int argc, char **argv) /* {{{ */
1171 {
1172         pingobj_t      *ping;
1173         pingobj_iter_t *iter;
1174
1175         struct sigaction sigint_action;
1176
1177         struct timeval  tv_begin;
1178         struct timeval  tv_end;
1179         struct timespec ts_wait;
1180         struct timespec ts_int;
1181
1182         int optind;
1183         int i;
1184         int status;
1185 #if _POSIX_SAVED_IDS
1186         uid_t saved_set_uid;
1187
1188         /* Save the old effective user id */
1189         saved_set_uid = geteuid ();
1190         /* Set the effective user ID to the real user ID without changing the
1191          * saved set-user ID */
1192         status = seteuid (getuid ());
1193         if (status != 0)
1194         {
1195                 fprintf (stderr, "Temporarily dropping privileges "
1196                                 "failed: %s\n", strerror (errno));
1197                 exit (EXIT_FAILURE);
1198         }
1199 #endif
1200
1201         setlocale(LC_ALL, "");
1202         optind = read_options (argc, argv);
1203
1204 #if !_POSIX_SAVED_IDS
1205         /* Cannot temporarily drop privileges -> reject every file but "-". */
1206         if ((opt_filename != NULL)
1207                         && (strcmp ("-", opt_filename) != 0)
1208                         && (getuid () != geteuid ()))
1209         {
1210                 fprintf (stderr, "Your real and effective user IDs don't "
1211                                 "match. Reading from a file (option '-f')\n"
1212                                 "is therefore too risky. You can still read "
1213                                 "from STDIN using '-f -' if you like.\n"
1214                                 "Sorry.\n");
1215                 exit (EXIT_FAILURE);
1216         }
1217 #endif
1218
1219         if ((optind >= argc) && (opt_filename == NULL)) {
1220                 usage_exit (argv[0], 1);
1221         }
1222
1223         if ((ping = ping_construct ()) == NULL)
1224         {
1225                 fprintf (stderr, "ping_construct failed\n");
1226                 return (1);
1227         }
1228
1229         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1230         {
1231                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1232                                 opt_send_ttl, ping_get_error (ping));
1233         }
1234
1235         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1236         {
1237                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1238                                 opt_send_qos, ping_get_error (ping));
1239         }
1240
1241         {
1242                 double temp_sec;
1243                 double temp_nsec;
1244
1245                 temp_nsec = modf (opt_interval, &temp_sec);
1246                 ts_int.tv_sec  = (time_t) temp_sec;
1247                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1248
1249                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1250         }
1251
1252         if (opt_addrfamily != PING_DEF_AF)
1253                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1254
1255         if (opt_srcaddr != NULL)
1256         {
1257                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1258                 {
1259                         fprintf (stderr, "Setting source address failed: %s\n",
1260                                         ping_get_error (ping));
1261                 }
1262         }
1263
1264         if (opt_device != NULL)
1265         {
1266                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1267                 {
1268                         fprintf (stderr, "Setting device failed: %s\n",
1269                                         ping_get_error (ping));
1270                 }
1271         }
1272
1273         if (opt_filename != NULL)
1274         {
1275                 FILE *infile;
1276                 char line[256];
1277                 char host[256];
1278
1279                 if (strcmp (opt_filename, "-") == 0)
1280                         /* Open STDIN */
1281                         infile = fdopen(0, "r");
1282                 else
1283                         infile = fopen(opt_filename, "r");
1284
1285                 if (infile == NULL)
1286                 {
1287                         fprintf (stderr, "Opening %s failed: %s\n",
1288                                         (strcmp (opt_filename, "-") == 0)
1289                                         ? "STDIN" : opt_filename,
1290                                         strerror(errno));
1291                         return (1);
1292                 }
1293
1294 #if _POSIX_SAVED_IDS
1295                 /* Regain privileges */
1296                 status = seteuid (saved_set_uid);
1297                 if (status != 0)
1298                 {
1299                         fprintf (stderr, "Temporarily re-gaining privileges "
1300                                         "failed: %s\n", strerror (errno));
1301                         exit (EXIT_FAILURE);
1302                 }
1303 #endif
1304
1305                 while (fgets(line, sizeof(line), infile))
1306                 {
1307                         /* Strip whitespace */
1308                         if (sscanf(line, "%s", host) != 1)
1309                                 continue;
1310
1311                         if ((host[0] == 0) || (host[0] == '#'))
1312                                 continue;
1313
1314                         if (ping_host_add(ping, host) < 0)
1315                         {
1316                                 const char *errmsg = ping_get_error (ping);
1317
1318                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1319                                 continue;
1320                         }
1321                         else
1322                         {
1323                                 host_num++;
1324                         }
1325                 }
1326
1327 #if _POSIX_SAVED_IDS
1328                 /* Drop privileges */
1329                 status = seteuid (getuid ());
1330                 if (status != 0)
1331                 {
1332                         fprintf (stderr, "Temporarily dropping privileges "
1333                                         "failed: %s\n", strerror (errno));
1334                         exit (EXIT_FAILURE);
1335                 }
1336 #endif
1337
1338                 fclose(infile);
1339         }
1340
1341 #if _POSIX_SAVED_IDS
1342         /* Regain privileges */
1343         status = seteuid (saved_set_uid);
1344         if (status != 0)
1345         {
1346                 fprintf (stderr, "Temporarily re-gaining privileges "
1347                                 "failed: %s\n", strerror (errno));
1348                 exit (EXIT_FAILURE);
1349         }
1350 #endif
1351
1352         for (i = optind; i < argc; i++)
1353         {
1354                 if (ping_host_add (ping, argv[i]) < 0)
1355                 {
1356                         const char *errmsg = ping_get_error (ping);
1357
1358                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1359                         continue;
1360                 }
1361                 else
1362                 {
1363                         host_num++;
1364                 }
1365         }
1366
1367         /* Permanently drop root privileges if we're setuid-root. */
1368         status = setuid (getuid ());
1369         if (status != 0)
1370         {
1371                 fprintf (stderr, "Dropping privileges failed: %s\n",
1372                                 strerror (errno));
1373                 exit (EXIT_FAILURE);
1374         }
1375
1376 #if _POSIX_SAVED_IDS
1377         saved_set_uid = (uid_t) -1;
1378 #endif
1379
1380         ping_initialize_contexts (ping);
1381
1382         if (i == 0)
1383                 return (1);
1384
1385         memset (&sigint_action, '\0', sizeof (sigint_action));
1386         sigint_action.sa_handler = sigint_handler;
1387         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1388         {
1389                 perror ("sigaction");
1390                 return (1);
1391         }
1392
1393         pre_loop_hook (ping);
1394
1395         while (opt_count != 0)
1396         {
1397                 int index;
1398                 int status;
1399
1400                 if (gettimeofday (&tv_begin, NULL) < 0)
1401                 {
1402                         perror ("gettimeofday");
1403                         return (1);
1404                 }
1405
1406                 if (ping_send (ping) < 0)
1407                 {
1408                         fprintf (stderr, "ping_send failed: %s\n",
1409                                         ping_get_error (ping));
1410                         return (1);
1411                 }
1412
1413                 index = 0;
1414                 for (iter = ping_iterator_get (ping);
1415                                 iter != NULL;
1416                                 iter = ping_iterator_next (iter))
1417                 {
1418                         update_host_hook (iter, index);
1419                         index++;
1420                 }
1421
1422                 pre_sleep_hook (ping);
1423
1424                 /* Don't sleep in the last iteration */
1425                 if (opt_count == 1)
1426                         break;
1427
1428                 if (gettimeofday (&tv_end, NULL) < 0)
1429                 {
1430                         perror ("gettimeofday");
1431                         return (1);
1432                 }
1433
1434                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1435
1436                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1437                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1438                 {
1439                         if (errno != EINTR)
1440                         {
1441                                 perror ("nanosleep");
1442                                 break;
1443                         }
1444                         else if (opt_count == 0)
1445                         {
1446                                 /* sigint */
1447                                 break;
1448                         }
1449                 }
1450
1451                 post_sleep_hook (ping);
1452
1453                 if (opt_count > 0)
1454                         opt_count--;
1455         } /* while (opt_count != 0) */
1456
1457         post_loop_hook (ping);
1458
1459         ping_destroy (ping);
1460
1461         return (0);
1462 } /* }}} int main */
1463
1464 /* vim: set fdm=marker : */