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 #ifndef IPTOS_MINCOST
 132 # define IPTOS_MINCOST 0x02
 133 #endif
 134
 135 /* Remove GNU specific __attribute__ settings when using another compiler */
 136 #if !__GNUC__
 137 # define __attribute__(x) /**/
 138 #endif
 139
 140 typedef struct ping_context
 141 {
 142         char host[NI_MAXHOST];
 143         char addr[NI_MAXHOST];
 144
 145         int index;
 146         int req_sent;
 147         int req_rcvd;
 148
 149         double latency_min;
 150         double latency_max;
 151         double latency_total;
 152         double latency_total_square;
 153
 154 #if USE_NCURSES
 155         WINDOW *window;
 156 #endif
 157 } ping_context_t;
 158
 159 static double  opt_interval   = 1.0;
 160 static int     opt_addrfamily = PING_DEF_AF;
 161 static char   *opt_srcaddr    = NULL;
 162 static char   *opt_device     = NULL;
 163 static char   *opt_filename   = NULL;
 164 static int     opt_count      = -1;
 165 static int     opt_send_ttl   = 64;
 166 static uint8_t opt_send_qos   = 0;
 167 #if USE_NCURSES
 168 static int     opt_utf8       = 0;
 169 #endif
 170
 171 static int host_num = 0;
 172
 173 #if USE_NCURSES
 174 static WINDOW *main_win = NULL;
 175 #endif
 176
 177 static void sigint_handler (int signal) /* {{{ */
 178 {
 179         /* Make compiler happy */
 180         signal = 0;
 181         /* Exit the loop */
 182         opt_count = 0;
 183 } /* }}} void sigint_handler */
 184
 185 static ping_context_t *context_create (void) /* {{{ */
 186 {
 187         ping_context_t *ret;
 188
 189         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 190                 return (NULL);
 191
 192         memset (ret, '\0', sizeof (ping_context_t));
 193
 194         ret->latency_min   = -1.0;
 195         ret->latency_max   = -1.0;
 196         ret->latency_total = 0.0;
 197         ret->latency_total_square = 0.0;
 198
 199 #if USE_NCURSES
 200         ret->window = NULL;
 201 #endif
 202
 203         return (ret);
 204 } /* }}} ping_context_t *context_create */
 205
 206 static void context_destroy (ping_context_t *context) /* {{{ */
 207 {
 208         if (context == NULL)
 209                 return;
 210
 211 #if USE_NCURSES
 212         if (context->window != NULL)
 213         {
 214                 delwin (context->window);
 215                 context->window = NULL;
 216         }
 217 #endif
 218
 219         free (context);
 220 } /* }}} void context_destroy */
 221
 222 static double context_get_average (ping_context_t *ctx) /* {{{ */
 223 {
 224         double num_total;
 225
 226         if (ctx == NULL)
 227                 return (-1.0);
 228
 229         if (ctx->req_rcvd < 1)
 230                 return (-0.0);
 231
 232         num_total = (double) ctx->req_rcvd;
 233         return (ctx->latency_total / num_total);
 234 } /* }}} double context_get_average */
 235
 236 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 237 {
 238         double num_total;
 239
 240         if (ctx == NULL)
 241                 return (-1.0);
 242
 243         if (ctx->req_rcvd < 1)
 244                 return (-0.0);
 245         else if (ctx->req_rcvd < 2)
 246                 return (0.0);
 247
 248         num_total = (double) ctx->req_rcvd;
 249         return (sqrt (((num_total * ctx->latency_total_square)
 250                                         - (ctx->latency_total * ctx->latency_total))
 251                                 / (num_total * (num_total - 1.0))));
 252 } /* }}} double context_get_stddev */
 253
 254 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 255 {
 256         if (ctx == NULL)
 257                 return (-1.0);
 258
 259         if (ctx->req_sent < 1)
 260                 return (0.0);
 261
 262         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 263                         / ((double) ctx->req_sent));
 264 } /* }}} double context_get_packet_loss */
 265
 266 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 267 {
 268         pingobj_iter_t *iter;
 269         int index;
 270
 271         if (ping == NULL)
 272                 return (EINVAL);
 273
 274         index = 0;
 275         for (iter = ping_iterator_get (ping);
 276                         iter != NULL;
 277                         iter = ping_iterator_next (iter))
 278         {
 279                 ping_context_t *context;
 280                 size_t buffer_size;
 281
 282                 context = context_create ();
 283                 context->index = index;
 284
 285                 buffer_size = sizeof (context->host);
 286                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 287
 288                 buffer_size = sizeof (context->addr);
 289                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 290
 291                 ping_iterator_set_context (iter, (void *) context);
 292
 293                 index++;
 294         }
 295
 296         return (0);
 297 } /* }}} int ping_initialize_contexts */
 298
 299 static void usage_exit (const char *name, int status) /* {{{ */
 300 {
 301         fprintf (stderr, "Usage: %s [OPTIONS] "
 302                                 "-f filename | host [host [host ...]]\n"
 303
 304                         "\nAvailable options:\n"
 305                         "  -4|-6        force the use of IPv4 or IPv6\n"
 306                         "  -c count     number of ICMP packets to send\n"
 307                         "  -i interval  interval with which to send ICMP packets\n"
 308                         "  -t ttl       time to live for each ICMP packet\n"
 309                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 310                         "               Use \"-Q help\" for a list of valid options.\n"
 311                         "  -I srcaddr   source address\n"
 312                         "  -D device    outgoing interface name\n"
 313                         "  -f filename  filename to read hosts from\n"
 314 #if USE_NCURSES
 315                         "  -u / -U      force / disable UTF-8 output\n"
 316 #endif
 317
 318                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 319                         "by Florian octo Forster <octo@verplant.org>\n"
 320                         "for contributions see `AUTHORS'\n",
 321                         name);
 322         exit (status);
 323 } /* }}} void usage_exit */
 324
 325 __attribute__((noreturn))
 326 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 327 {
 328         if (arg != 0)
 329                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 330
 331         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 332                         "\n"
 333                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 334                         "\n"
 335                         "    be                     Best Effort (BE, default PHB).\n"
 336                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 337                         "                           (low delay, low loss, low jitter)\n"
 338                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 339                         "                           (capacity-admitted traffic)\n"
 340                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 341                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 342                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 343                         "                           For example: \"cs1\" (priority traffic)\n"
 344                         "\n"
 345                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 346                         "\n"
 347                         "    lowdelay     (%#04x)    minimize delay\n"
 348                         "    throughput   (%#04x)    maximize throughput\n"
 349                         "    reliability  (%#04x)    maximize reliability\n"
 350                         "    mincost      (%#04x)    minimize monetary cost\n"
 351                         "\n"
 352                         "  Specify manually\n"
 353                         "\n"
 354                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 355                         "       0 -  255            Decimal numeric specification.\n"
 356                         "\n",
 357                         (unsigned int) IPTOS_LOWDELAY,
 358                         (unsigned int) IPTOS_THROUGHPUT,
 359                         (unsigned int) IPTOS_RELIABILITY,
 360                         (unsigned int) IPTOS_MINCOST);
 361
 362         exit (status);
 363 } /* }}} void usage_qos_exit */
 364
 365 static int set_opt_send_qos (const char *opt) /* {{{ */
 366 {
 367         if (opt == NULL)
 368                 return (EINVAL);
 369
 370         if (strcasecmp ("help", opt) == 0)
 371                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 372         /* DiffServ (RFC 2474): */
 373         /* - Best effort (BE) */
 374         else if (strcasecmp ("be", opt) == 0)
 375                 opt_send_qos = 0;
 376         /* - Expedited Forwarding (EF, RFC 3246) */
 377         else if (strcasecmp ("ef", opt) == 0)
 378                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 379         /* - Voice Admit (VA, RFC 5865) */
 380         else if (strcasecmp ("va", opt) == 0)
 381                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 382         /* - Assured Forwarding (AF, RFC 2597) */
 383         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 384                         && (strlen (opt) == 4))
 385         {
 386                 uint8_t dscp;
 387                 uint8_t class = 0;
 388                 uint8_t prec = 0;
 389
 390                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 391                 if (opt[2] == '1')
 392                         class = 1;
 393                 else if (opt[2] == '2')
 394                         class = 2;
 395                 else if (opt[2] == '3')
 396                         class = 3;
 397                 else if (opt[2] == '4')
 398                         class = 4;
 399                 else
 400                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 401
 402                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 403                 if (opt[3] == '1')
 404                         prec = 1;
 405                 else if (opt[3] == '2')
 406                         prec = 2;
 407                 else if (opt[3] == '3')
 408                         prec = 3;
 409                 else
 410                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 411
 412                 dscp = (8 * class) + (2 * prec);
 413                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 414                 opt_send_qos = dscp << 2;
 415         }
 416         /* - Class Selector (CS) */
 417         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 418                         && (strlen (opt) == 3))
 419         {
 420                 uint8_t class;
 421
 422                 if ((opt[2] < '0') || (opt[2] > '7'))
 423                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 424
 425                 /* Not exactly legal by the C standard, but I don't know of any
 426                  * system not supporting this hack. */
 427                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 428                 opt_send_qos = class << 5;
 429         }
 430         /* Type of Service (RFC 1349) */
 431         else if (strcasecmp ("lowdelay", opt) == 0)
 432                 opt_send_qos = IPTOS_LOWDELAY;
 433         else if (strcasecmp ("throughput", opt) == 0)
 434                 opt_send_qos = IPTOS_THROUGHPUT;
 435         else if (strcasecmp ("reliability", opt) == 0)
 436                 opt_send_qos = IPTOS_RELIABILITY;
 437         else if (strcasecmp ("mincost", opt) == 0)
 438                 opt_send_qos = IPTOS_MINCOST;
 439         /* Numeric value */
 440         else
 441         {
 442                 unsigned long value;
 443                 char *endptr;
 444
 445                 errno = 0;
 446                 endptr = NULL;
 447                 value = strtoul (opt, &endptr, /* base = */ 0);
 448                 if ((errno != 0) || (endptr == opt)
 449                                 || (endptr == NULL) || (*endptr != 0)
 450                                 || (value > 0xff))
 451                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 452
 453                 opt_send_qos = (uint8_t) value;
 454         }
 455
 456         return (0);
 457 } /* }}} int set_opt_send_qos */
 458
 459 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 460 {
 461         uint8_t dscp;
 462         uint8_t ecn;
 463         char *dscp_str;
 464         char *ecn_str;
 465
 466         dscp = qos >> 2;
 467         ecn = qos & 0x03;
 468
 469         switch (dscp)
 470         {
 471                 case 0x00: dscp_str = "be";  break;
 472                 case 0x2e: dscp_str = "ef";  break;
 473                 case 0x2d: dscp_str = "va";  break;
 474                 case 0x0a: dscp_str = "af11"; break;
 475                 case 0x0c: dscp_str = "af12"; break;
 476                 case 0x0e: dscp_str = "af13"; break;
 477                 case 0x12: dscp_str = "af21"; break;
 478                 case 0x14: dscp_str = "af22"; break;
 479                 case 0x16: dscp_str = "af23"; break;
 480                 case 0x1a: dscp_str = "af31"; break;
 481                 case 0x1c: dscp_str = "af32"; break;
 482                 case 0x1e: dscp_str = "af33"; break;
 483                 case 0x22: dscp_str = "af41"; break;
 484                 case 0x24: dscp_str = "af42"; break;
 485                 case 0x26: dscp_str = "af43"; break;
 486                 case 0x08: dscp_str = "cs1";  break;
 487                 case 0x10: dscp_str = "cs2";  break;
 488                 case 0x18: dscp_str = "cs3";  break;
 489                 case 0x20: dscp_str = "cs4";  break;
 490                 case 0x28: dscp_str = "cs5";  break;
 491                 case 0x30: dscp_str = "cs6";  break;
 492                 case 0x38: dscp_str = "cs7";  break;
 493                 default:   dscp_str = NULL;
 494         }
 495
 496         switch (ecn)
 497         {
 498                 case 0x01: ecn_str = ",ecn(1)"; break;
 499                 case 0x02: ecn_str = ",ecn(0)"; break;
 500                 case 0x03: ecn_str = ",ce"; break;
 501                 default:   ecn_str = "";
 502         }
 503
 504         if (dscp_str == NULL)
 505                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 506         else
 507                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 508         buffer[buffer_size - 1] = 0;
 509
 510         return (buffer);
 511 } /* }}} char *format_qos */
 512
 513 static int read_options (int argc, char **argv) /* {{{ */
 514 {
 515         int optchar;
 516
 517         while (1)
 518         {
 519                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:"
 520 #if USE_NCURSES
 521                                 "uU"
 522 #endif
 523                                 );
 524
 525                 if (optchar == -1)
 526                         break;
 527
 528                 switch (optchar)
 529                 {
 530                         case '4':
 531                         case '6':
 532                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 533                                 break;
 534
 535                         case 'c':
 536                                 {
 537                                         int new_count;
 538                                         new_count = atoi (optarg);
 539                                         if (new_count > 0)
 540                                                 opt_count = new_count;
 541                                         else
 542                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 543                                                                 optarg);
 544                                 }
 545                                 break;
 546
 547                         case 'f':
 548                                 {
 549                                         if (opt_filename != NULL)
 550                                                 free (opt_filename);
 551                                         opt_filename = strdup (optarg);
 552                                 }
 553                                 break;
 554
 555                         case 'i':
 556                                 {
 557                                         double new_interval;
 558                                         new_interval = atof (optarg);
 559                                         if (new_interval < 0.001)
 560                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 561                                                                 optarg);
 562                                         else
 563                                                 opt_interval = new_interval;
 564                                 }
 565                                 break;
 566                         case 'I':
 567                                 {
 568                                         if (opt_srcaddr != NULL)
 569                                                 free (opt_srcaddr);
 570                                         opt_srcaddr = strdup (optarg);
 571                                 }
 572                                 break;
 573
 574                         case 'D':
 575                                 opt_device = optarg;
 576                                 break;
 577
 578                         case 't':
 579                         {
 580                                 int new_send_ttl;
 581                                 new_send_ttl = atoi (optarg);
 582                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 583                                         opt_send_ttl = new_send_ttl;
 584                                 else
 585                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 586                                                         optarg);
 587                                 break;
 588                         }
 589
 590                         case 'Q':
 591                                 set_opt_send_qos (optarg);
 592                                 break;
 593
 594 #if USE_NCURSES
 595                         case 'u':
 596                                 opt_utf8 = 2;
 597                                 break;
 598                         case 'U':
 599                                 opt_utf8 = 1;
 600                                 break;
 601 #endif
 602
 603                         case 'h':
 604                                 usage_exit (argv[0], 0);
 605                                 break;
 606                         default:
 607                                 usage_exit (argv[0], 1);
 608                 }
 609         }
 610
 611         return (optind);
 612 } /* }}} read_options */
 613
 614 static void time_normalize (struct timespec *ts) /* {{{ */
 615 {
 616         while (ts->tv_nsec < 0)
 617         {
 618                 if (ts->tv_sec == 0)
 619                 {
 620                         ts->tv_nsec = 0;
 621                         return;
 622                 }
 623
 624                 ts->tv_sec  -= 1;
 625                 ts->tv_nsec += 1000000000;
 626         }
 627
 628         while (ts->tv_nsec >= 1000000000)
 629         {
 630                 ts->tv_sec  += 1;
 631                 ts->tv_nsec -= 1000000000;
 632         }
 633 } /* }}} void time_normalize */
 634
 635 static void time_calc (struct timespec *ts_dest, /* {{{ */
 636                 const struct timespec *ts_int,
 637                 const struct timeval  *tv_begin,
 638                 const struct timeval  *tv_end)
 639 {
 640         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 641         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 642         time_normalize (ts_dest);
 643
 644         /* Assure that `(begin + interval) > end'.
 645          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 646          * which may be `unsigned. *sigh* */
 647         if ((tv_end->tv_sec > ts_dest->tv_sec)
 648                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 649                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 650         {
 651                 ts_dest->tv_sec  = 0;
 652                 ts_dest->tv_nsec = 0;
 653                 return;
 654         }
 655
 656         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 657         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 658         time_normalize (ts_dest);
 659 } /* }}} void time_calc */
 660
 661 #if USE_NCURSES
 662 static _Bool has_utf8() /* {{{ */
 663 {
 664 # if HAVE_NCURSESW_NCURSES_H
 665         if (!opt_utf8)
 666         {
 667                 /* Automatically determine */
 668                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 669                         opt_utf8 = 2;
 670                 else
 671                         opt_utf8 = 1;
 672         }
 673         return ((_Bool) (opt_utf8 - 1));
 674 # else
 675         return (0);
 676 # endif
 677 } /* }}} _Bool has_utf8 */
 678
 679 static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
 680                 double latency, unsigned int sequence)
 681 {
 682         int color = OPING_RED;
 683         char const *symbol = "!";
 684         int symbolc = '!';
 685
 686         int x_max;
 687         int x_pos;
 688
 689         x_max = getmaxx (ctx->window);
 690         x_pos = ((sequence - 1) % (x_max - 4)) + 2;
 691
 692         if (latency >= 0.0)
 693         {
 694                 double ratio;
 695
 696                 size_t symbols_num = hist_symbols_acs_num;
 697                 size_t colors_num = 1;
 698
 699                 size_t index_symbols;
 700                 size_t index_colors;
 701                 size_t intensity;
 702
 703                 /* latency is in milliseconds, opt_interval is in seconds. */
 704                 ratio = (latency * 0.001) / opt_interval;
 705                 if (ratio > 1) {
 706                         ratio = 1.0;
 707                 }
 708
 709                 if (has_utf8 ())
 710                         symbols_num = hist_symbols_utf8_num;
 711
 712                 if (has_colors () == TRUE)
 713                         colors_num = hist_colors_num;
 714
 715                 intensity = (size_t) (ratio * ((double) (symbols_num * colors_num)));
 716                 if (intensity >= (symbols_num * colors_num))
 717                         intensity = (symbols_num * colors_num) - 1;
 718
 719                 index_symbols = intensity % symbols_num;
 720                 assert (index_symbols < symbols_num);
 721
 722                 index_colors = intensity / symbols_num;
 723                 assert (index_colors < colors_num);
 724
 725                 if (has_utf8())
 726                 {
 727                         color = hist_colors_utf8[index_colors];
 728                         symbol = hist_symbols_utf8[index_symbols];
 729                 }
 730                 else
 731                 {
 732                         color = hist_colors_acs[index_colors];
 733                         symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
 734                 }
 735         }
 736         else /* if (!(latency >= 0.0)) */
 737                 wattron (ctx->window, A_BOLD);
 738
 739         if (has_colors () == TRUE)
 740                 wattron (ctx->window, COLOR_PAIR(color));
 741
 742         if (has_utf8())
 743                 mvwprintw (ctx->window, /* y = */ 3, /* x = */ x_pos, symbol);
 744         else
 745                 mvwaddch (ctx->window, /* y = */ 3, /* x = */ x_pos, symbolc);
 746
 747         if (has_colors () == TRUE)
 748                 wattroff (ctx->window, COLOR_PAIR(color));
 749
 750         /* Use negation here to handle NaN correctly. */
 751         if (!(latency >= 0.0))
 752                 wattroff (ctx->window, A_BOLD);
 753
 754         wprintw (ctx->window, " ");
 755         return (0);
 756 } /* }}} int update_prettyping_graph */
 757
 758 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 759 {
 760         double latency = -1.0;
 761         size_t buffer_len = sizeof (latency);
 762
 763         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 764                         &latency, &buffer_len);
 765
 766         unsigned int sequence = 0;
 767         buffer_len = sizeof (sequence);
 768         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 769                         &sequence, &buffer_len);
 770
 771
 772         if ((ctx == NULL) || (ctx->window == NULL))
 773                 return (EINVAL);
 774
 775         /* werase (ctx->window); */
 776
 777         box (ctx->window, 0, 0);
 778         wattron (ctx->window, A_BOLD);
 779         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 780                         " %s ", ctx->host);
 781         wattroff (ctx->window, A_BOLD);
 782         wprintw (ctx->window, "ping statistics ");
 783         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 784                         "%i packets transmitted, %i received, %.2f%% packet "
 785                         "loss, time %.1fms",
 786                         ctx->req_sent, ctx->req_rcvd,
 787                         context_get_packet_loss (ctx),
 788                         ctx->latency_total);
 789         if (ctx->req_rcvd != 0)
 790         {
 791                 double average;
 792                 double deviation;
 793
 794                 average = context_get_average (ctx);
 795                 deviation = context_get_stddev (ctx);
 796
 797                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 798                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 799                                 ctx->latency_min,
 800                                 average,
 801                                 ctx->latency_max,
 802                                 deviation);
 803         }
 804
 805         update_prettyping_graph (ctx, latency, sequence);
 806
 807         wrefresh (ctx->window);
 808
 809         return (0);
 810 } /* }}} int update_stats_from_context */
 811
 812 static int on_resize (pingobj_t *ping) /* {{{ */
 813 {
 814         pingobj_iter_t *iter;
 815         int width = 0;
 816         int height = 0;
 817         int main_win_height;
 818
 819         getmaxyx (stdscr, height, width);
 820         if ((height < 1) || (width < 1))
 821                 return (EINVAL);
 822
 823         main_win_height = height - (5 * host_num);
 824         wresize (main_win, main_win_height, /* width = */ width);
 825         /* Allow scrolling */
 826         scrollok (main_win, TRUE);
 827         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 828         /* Allow hardware accelerated scrolling. */
 829         idlok (main_win, TRUE);
 830         wrefresh (main_win);
 831
 832         for (iter = ping_iterator_get (ping);
 833                         iter != NULL;
 834                         iter = ping_iterator_next (iter))
 835         {
 836                 ping_context_t *context;
 837
 838                 context = ping_iterator_get_context (iter);
 839                 if (context == NULL)
 840                         continue;
 841
 842                 if (context->window != NULL)
 843                 {
 844                         delwin (context->window);
 845                         context->window = NULL;
 846                 }
 847                 context->window = newwin (/* height = */ 5,
 848                                 /* width = */ width,
 849                                 /* y = */ main_win_height + (5 * context->index),
 850                                 /* x = */ 0);
 851         }
 852
 853         return (0);
 854 } /* }}} */
 855
 856 static int check_resize (pingobj_t *ping) /* {{{ */
 857 {
 858         int need_resize = 0;
 859
 860         while (42)
 861         {
 862                 int key = wgetch (stdscr);
 863                 if (key == ERR)
 864                         break;
 865                 else if (key == KEY_RESIZE)
 866                         need_resize = 1;
 867         }
 868
 869         if (need_resize)
 870                 return (on_resize (ping));
 871         else
 872                 return (0);
 873 } /* }}} int check_resize */
 874
 875 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 876 {
 877         pingobj_iter_t *iter;
 878         int width = 0;
 879         int height = 0;
 880         int main_win_height;
 881
 882         initscr ();
 883         cbreak ();
 884         noecho ();
 885         nodelay (stdscr, TRUE);
 886
 887         getmaxyx (stdscr, height, width);
 888         if ((height < 1) || (width < 1))
 889                 return (EINVAL);
 890
 891         if (has_colors () == TRUE)
 892         {
 893                 start_color ();
 894                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 895                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 896                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 897                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
 898                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
 899                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
 900         }
 901
 902         main_win_height = height - (5 * host_num);
 903         main_win = newwin (/* height = */ main_win_height,
 904                         /* width = */ width,
 905                         /* y = */ 0, /* x = */ 0);
 906         /* Allow scrolling */
 907         scrollok (main_win, TRUE);
 908         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 909         /* Allow hardware accelerated scrolling. */
 910         idlok (main_win, TRUE);
 911         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 912         wrefresh (main_win);
 913
 914         for (iter = ping_iterator_get (ping);
 915                         iter != NULL;
 916                         iter = ping_iterator_next (iter))
 917         {
 918                 ping_context_t *context;
 919
 920                 context = ping_iterator_get_context (iter);
 921                 if (context == NULL)
 922                         continue;
 923
 924                 if (context->window != NULL)
 925                 {
 926                         delwin (context->window);
 927                         context->window = NULL;
 928                 }
 929                 context->window = newwin (/* height = */ 5,
 930                                 /* width = */ width,
 931                                 /* y = */ main_win_height + (5 * context->index),
 932                                 /* x = */ 0);
 933         }
 934
 935
 936         /* Don't know what good this does exactly, but without this code
 937          * "check_resize" will be called right after startup and *somehow*
 938          * this leads to display errors. If we purge all initial characters
 939          * here, the problem goes away. "wgetch" is non-blocking due to
 940          * "nodelay" (see above). */
 941         while (wgetch (stdscr) != ERR)
 942         {
 943                 /* eat up characters */;
 944         }
 945
 946         return (0);
 947 } /* }}} int pre_loop_hook */
 948
 949 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 950 {
 951         return (check_resize (ping));
 952 } /* }}} int pre_sleep_hook */
 953
 954 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 955 {
 956         return (check_resize (ping));
 957 } /* }}} int pre_sleep_hook */
 958 #else /* if !USE_NCURSES */
 959 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 960 {
 961         pingobj_iter_t *iter;
 962
 963         for (iter = ping_iterator_get (ping);
 964                         iter != NULL;
 965                         iter = ping_iterator_next (iter))
 966         {
 967                 ping_context_t *ctx;
 968                 size_t buffer_size;
 969
 970                 ctx = ping_iterator_get_context (iter);
 971                 if (ctx == NULL)
 972                         continue;
 973
 974                 buffer_size = 0;
 975                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 976
 977                 printf ("PING %s (%s) %zu bytes of data.\n",
 978                                 ctx->host, ctx->addr, buffer_size);
 979         }
 980
 981         return (0);
 982 } /* }}} int pre_loop_hook */
 983
 984 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 985 {
 986         fflush (stdout);
 987
 988         return (0);
 989 } /* }}} int pre_sleep_hook */
 990
 991 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 992 {
 993         return (0);
 994 } /* }}} int post_sleep_hook */
 995 #endif
 996
 997 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 998                 __attribute__((unused)) int index)
 999 {
1000         double          latency;
1001         unsigned int    sequence;
1002         int             recv_ttl;
1003         uint8_t         recv_qos;
1004         char            recv_qos_str[16];
1005         size_t          buffer_len;
1006         size_t          data_len;
1007         ping_context_t *context;
1008
1009         latency = -1.0;
1010         buffer_len = sizeof (latency);
1011         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1012                         &latency, &buffer_len);
1013
1014         sequence = 0;
1015         buffer_len = sizeof (sequence);
1016         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
1017                         &sequence, &buffer_len);
1018
1019         recv_ttl = -1;
1020         buffer_len = sizeof (recv_ttl);
1021         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
1022                         &recv_ttl, &buffer_len);
1023
1024         recv_qos = 0;
1025         buffer_len = sizeof (recv_qos);
1026         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1027                         &recv_qos, &buffer_len);
1028
1029         data_len = 0;
1030         ping_iterator_get_info (iter, PING_INFO_DATA,
1031                         NULL, &data_len);
1032
1033         context = (ping_context_t *) ping_iterator_get_context (iter);
1034
1035 #if USE_NCURSES
1036 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1037 #else
1038 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1039 #endif
1040
1041         context->req_sent++;
1042         if (latency > 0.0)
1043         {
1044                 context->req_rcvd++;
1045                 context->latency_total += latency;
1046                 context->latency_total_square += (latency * latency);
1047
1048                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
1049                         context->latency_max = latency;
1050                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
1051                         context->latency_min = latency;
1052
1053 #if USE_NCURSES
1054                 if (has_colors () == TRUE)
1055                 {
1056                         int color = OPING_GREEN;
1057                         double average = context_get_average (context);
1058                         double stddev = context_get_stddev (context);
1059
1060                         if ((latency < (average - (2 * stddev)))
1061                                         || (latency > (average + (2 * stddev))))
1062                                 color = OPING_RED;
1063                         else if ((latency < (average - stddev))
1064                                         || (latency > (average + stddev)))
1065                                 color = OPING_YELLOW;
1066
1067                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1068                                         data_len, context->host, context->addr,
1069                                         sequence, recv_ttl,
1070                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1071                         if ((recv_qos != 0) || (opt_send_qos != 0))
1072                         {
1073                                 HOST_PRINTF ("qos=%s ",
1074                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1075                         }
1076                         HOST_PRINTF ("time=");
1077                         wattron (main_win, COLOR_PAIR(color));
1078                         HOST_PRINTF ("%.2f", latency);
1079                         wattroff (main_win, COLOR_PAIR(color));
1080                         HOST_PRINTF (" ms\n");
1081                 }
1082                 else
1083                 {
1084 #endif
1085                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1086                                 data_len,
1087                                 context->host, context->addr,
1088                                 sequence, recv_ttl);
1089                 if ((recv_qos != 0) || (opt_send_qos != 0))
1090                 {
1091                         HOST_PRINTF ("qos=%s ",
1092                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1093                 }
1094                 HOST_PRINTF ("time=%.2f ms\n", latency);
1095 #if USE_NCURSES
1096                 }
1097 #endif
1098         }
1099         else
1100         {
1101 #if USE_NCURSES
1102                 if (has_colors () == TRUE)
1103                 {
1104                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1105                                         context->host, context->addr,
1106                                         sequence);
1107                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1108                         HOST_PRINTF ("timeout");
1109                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1110                         HOST_PRINTF ("\n");
1111                 }
1112                 else
1113                 {
1114 #endif
1115                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1116                                 context->host, context->addr,
1117                                 sequence);
1118 #if USE_NCURSES
1119                 }
1120 #endif
1121         }
1122
1123 #if USE_NCURSES
1124         update_stats_from_context (context, iter);
1125         wrefresh (main_win);
1126 #endif
1127 } /* }}} void update_host_hook */
1128
1129 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1130 {
1131         pingobj_iter_t *iter;
1132
1133 #if USE_NCURSES
1134         endwin ();
1135 #endif
1136
1137         for (iter = ping_iterator_get (ping);
1138                         iter != NULL;
1139                         iter = ping_iterator_next (iter))
1140         {
1141                 ping_context_t *context;
1142
1143                 context = ping_iterator_get_context (iter);
1144
1145                 printf ("\n--- %s ping statistics ---\n"
1146                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1147                                 context->host, context->req_sent, context->req_rcvd,
1148                                 context_get_packet_loss (context),
1149                                 context->latency_total);
1150
1151                 if (context->req_rcvd != 0)
1152                 {
1153                         double average;
1154                         double deviation;
1155
1156                         average = context_get_average (context);
1157                         deviation = context_get_stddev (context);
1158
1159                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1160                                         context->latency_min,
1161                                         average,
1162                                         context->latency_max,
1163                                         deviation);
1164                 }
1165
1166                 ping_iterator_set_context (iter, NULL);
1167                 context_destroy (context);
1168         }
1169
1170         return (0);
1171 } /* }}} int post_loop_hook */
1172
1173 int main (int argc, char **argv) /* {{{ */
1174 {
1175         pingobj_t      *ping;
1176         pingobj_iter_t *iter;
1177
1178         struct sigaction sigint_action;
1179
1180         struct timeval  tv_begin;
1181         struct timeval  tv_end;
1182         struct timespec ts_wait;
1183         struct timespec ts_int;
1184
1185         int optind;
1186         int i;
1187         int status;
1188 #if _POSIX_SAVED_IDS
1189         uid_t saved_set_uid;
1190
1191         /* Save the old effective user id */
1192         saved_set_uid = geteuid ();
1193         /* Set the effective user ID to the real user ID without changing the
1194          * saved set-user ID */
1195         status = seteuid (getuid ());
1196         if (status != 0)
1197         {
1198                 fprintf (stderr, "Temporarily dropping privileges "
1199                                 "failed: %s\n", strerror (errno));
1200                 exit (EXIT_FAILURE);
1201         }
1202 #endif
1203
1204         setlocale(LC_ALL, "");
1205         optind = read_options (argc, argv);
1206
1207 #if !_POSIX_SAVED_IDS
1208         /* Cannot temporarily drop privileges -> reject every file but "-". */
1209         if ((opt_filename != NULL)
1210                         && (strcmp ("-", opt_filename) != 0)
1211                         && (getuid () != geteuid ()))
1212         {
1213                 fprintf (stderr, "Your real and effective user IDs don't "
1214                                 "match. Reading from a file (option '-f')\n"
1215                                 "is therefore too risky. You can still read "
1216                                 "from STDIN using '-f -' if you like.\n"
1217                                 "Sorry.\n");
1218                 exit (EXIT_FAILURE);
1219         }
1220 #endif
1221
1222         if ((optind >= argc) && (opt_filename == NULL)) {
1223                 usage_exit (argv[0], 1);
1224         }
1225
1226         if ((ping = ping_construct ()) == NULL)
1227         {
1228                 fprintf (stderr, "ping_construct failed\n");
1229                 return (1);
1230         }
1231
1232         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1233         {
1234                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1235                                 opt_send_ttl, ping_get_error (ping));
1236         }
1237
1238         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1239         {
1240                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1241                                 opt_send_qos, ping_get_error (ping));
1242         }
1243
1244         {
1245                 double temp_sec;
1246                 double temp_nsec;
1247
1248                 temp_nsec = modf (opt_interval, &temp_sec);
1249                 ts_int.tv_sec  = (time_t) temp_sec;
1250                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1251
1252                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1253         }
1254
1255         if (opt_addrfamily != PING_DEF_AF)
1256                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1257
1258         if (opt_srcaddr != NULL)
1259         {
1260                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1261                 {
1262                         fprintf (stderr, "Setting source address failed: %s\n",
1263                                         ping_get_error (ping));
1264                 }
1265         }
1266
1267         if (opt_device != NULL)
1268         {
1269                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1270                 {
1271                         fprintf (stderr, "Setting device failed: %s\n",
1272                                         ping_get_error (ping));
1273                 }
1274         }
1275
1276         if (opt_filename != NULL)
1277         {
1278                 FILE *infile;
1279                 char line[256];
1280                 char host[256];
1281
1282                 if (strcmp (opt_filename, "-") == 0)
1283                         /* Open STDIN */
1284                         infile = fdopen(0, "r");
1285                 else
1286                         infile = fopen(opt_filename, "r");
1287
1288                 if (infile == NULL)
1289                 {
1290                         fprintf (stderr, "Opening %s failed: %s\n",
1291                                         (strcmp (opt_filename, "-") == 0)
1292                                         ? "STDIN" : opt_filename,
1293                                         strerror(errno));
1294                         return (1);
1295                 }
1296
1297 #if _POSIX_SAVED_IDS
1298                 /* Regain privileges */
1299                 status = seteuid (saved_set_uid);
1300                 if (status != 0)
1301                 {
1302                         fprintf (stderr, "Temporarily re-gaining privileges "
1303                                         "failed: %s\n", strerror (errno));
1304                         exit (EXIT_FAILURE);
1305                 }
1306 #endif
1307
1308                 while (fgets(line, sizeof(line), infile))
1309                 {
1310                         /* Strip whitespace */
1311                         if (sscanf(line, "%s", host) != 1)
1312                                 continue;
1313
1314                         if ((host[0] == 0) || (host[0] == '#'))
1315                                 continue;
1316
1317                         if (ping_host_add(ping, host) < 0)
1318                         {
1319                                 const char *errmsg = ping_get_error (ping);
1320
1321                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1322                                 continue;
1323                         }
1324                         else
1325                         {
1326                                 host_num++;
1327                         }
1328                 }
1329
1330 #if _POSIX_SAVED_IDS
1331                 /* Drop privileges */
1332                 status = seteuid (getuid ());
1333                 if (status != 0)
1334                 {
1335                         fprintf (stderr, "Temporarily dropping privileges "
1336                                         "failed: %s\n", strerror (errno));
1337                         exit (EXIT_FAILURE);
1338                 }
1339 #endif
1340
1341                 fclose(infile);
1342         }
1343
1344 #if _POSIX_SAVED_IDS
1345         /* Regain privileges */
1346         status = seteuid (saved_set_uid);
1347         if (status != 0)
1348         {
1349                 fprintf (stderr, "Temporarily re-gaining privileges "
1350                                 "failed: %s\n", strerror (errno));
1351                 exit (EXIT_FAILURE);
1352         }
1353 #endif
1354
1355         for (i = optind; i < argc; i++)
1356         {
1357                 if (ping_host_add (ping, argv[i]) < 0)
1358                 {
1359                         const char *errmsg = ping_get_error (ping);
1360
1361                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1362                         continue;
1363                 }
1364                 else
1365                 {
1366                         host_num++;
1367                 }
1368         }
1369
1370         /* Permanently drop root privileges if we're setuid-root. */
1371         status = setuid (getuid ());
1372         if (status != 0)
1373         {
1374                 fprintf (stderr, "Dropping privileges failed: %s\n",
1375                                 strerror (errno));
1376                 exit (EXIT_FAILURE);
1377         }
1378
1379 #if _POSIX_SAVED_IDS
1380         saved_set_uid = (uid_t) -1;
1381 #endif
1382
1383         ping_initialize_contexts (ping);
1384
1385         if (i == 0)
1386                 return (1);
1387
1388         memset (&sigint_action, '\0', sizeof (sigint_action));
1389         sigint_action.sa_handler = sigint_handler;
1390         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1391         {
1392                 perror ("sigaction");
1393                 return (1);
1394         }
1395
1396         pre_loop_hook (ping);
1397
1398         while (opt_count != 0)
1399         {
1400                 int index;
1401                 int status;
1402
1403                 if (gettimeofday (&tv_begin, NULL) < 0)
1404                 {
1405                         perror ("gettimeofday");
1406                         return (1);
1407                 }
1408
1409                 status = ping_send (ping);
1410                 if (status == -EINTR)
1411                 {
1412                         continue;
1413                 }
1414                 else if (status < 0)
1415                 {
1416                         fprintf (stderr, "ping_send failed: %s\n",
1417                                         ping_get_error (ping));
1418                         return (1);
1419                 }
1420
1421                 index = 0;
1422                 for (iter = ping_iterator_get (ping);
1423                                 iter != NULL;
1424                                 iter = ping_iterator_next (iter))
1425                 {
1426                         update_host_hook (iter, index);
1427                         index++;
1428                 }
1429
1430                 pre_sleep_hook (ping);
1431
1432                 /* Don't sleep in the last iteration */
1433                 if (opt_count == 1)
1434                         break;
1435
1436                 if (gettimeofday (&tv_end, NULL) < 0)
1437                 {
1438                         perror ("gettimeofday");
1439                         return (1);
1440                 }
1441
1442                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1443
1444                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1445                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1446                 {
1447                         if (errno == EINTR)
1448                         {
1449                                 continue;
1450                         }
1451                         else
1452                         {
1453                                 perror ("nanosleep");
1454                                 break;
1455                         }
1456                 }
1457
1458                 post_sleep_hook (ping);
1459
1460                 if (opt_count > 0)
1461                         opt_count--;
1462         } /* while (opt_count != 0) */
1463
1464         post_loop_hook (ping);
1465
1466         ping_destroy (ping);
1467
1468         return (0);
1469 } /* }}} int main */
1470
1471 /* vim: set fdm=marker : */