src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2014  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 /* 1000 + one "infinity" bucket. */
 155 #define OPING_HISTOGRAM_BUCKETS 1001
 156         uint32_t *latency_histogram;
 157         size_t latency_histogram_size;
 158
 159 #if USE_NCURSES
 160         WINDOW *window;
 161 #endif
 162 } ping_context_t;
 163
 164 static double  opt_interval   = 1.0;
 165 static int     opt_addrfamily = PING_DEF_AF;
 166 static char   *opt_srcaddr    = NULL;
 167 static char   *opt_device     = NULL;
 168 static char   *opt_filename   = NULL;
 169 static int     opt_count      = -1;
 170 static int     opt_send_ttl   = 64;
 171 static uint8_t opt_send_qos   = 0;
 172 #define OPING_DEFAULT_PERCENTILE 95.0
 173 static double  opt_percentile = -1.0;
 174 static double  opt_exit_status_threshold = 1.0;
 175 #if USE_NCURSES
 176 static int     opt_utf8       = 0;
 177 #endif
 178
 179 static int host_num = 0;
 180
 181 #if USE_NCURSES
 182 static WINDOW *main_win = NULL;
 183 #endif
 184
 185 static void sigint_handler (int signal) /* {{{ */
 186 {
 187         /* Make compiler happy */
 188         signal = 0;
 189         /* Exit the loop */
 190         opt_count = 0;
 191 } /* }}} void sigint_handler */
 192
 193 static ping_context_t *context_create (void) /* {{{ */
 194 {
 195         ping_context_t *ret;
 196
 197         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 198                 return (NULL);
 199
 200         memset (ret, '\0', sizeof (ping_context_t));
 201
 202         ret->latency_min   = -1.0;
 203         ret->latency_max   = -1.0;
 204         ret->latency_total = 0.0;
 205         ret->latency_total_square = 0.0;
 206
 207         ret->latency_histogram_size = (size_t) OPING_HISTOGRAM_BUCKETS;
 208         ret->latency_histogram = calloc (ret->latency_histogram_size,
 209                         sizeof (*ret->latency_histogram));
 210
 211 #if USE_NCURSES
 212         ret->window = NULL;
 213 #endif
 214
 215         return (ret);
 216 } /* }}} ping_context_t *context_create */
 217
 218 static void context_destroy (ping_context_t *context) /* {{{ */
 219 {
 220         if (context == NULL)
 221                 return;
 222
 223 #if USE_NCURSES
 224         if (context->window != NULL)
 225         {
 226                 delwin (context->window);
 227                 context->window = NULL;
 228         }
 229 #endif
 230
 231         free (context->latency_histogram);
 232         context->latency_histogram = NULL;
 233
 234         free (context);
 235 } /* }}} void context_destroy */
 236
 237 static double context_get_average (ping_context_t *ctx) /* {{{ */
 238 {
 239         double num_total;
 240
 241         if (ctx == NULL)
 242                 return (-1.0);
 243
 244         if (ctx->req_rcvd < 1)
 245                 return (-0.0);
 246
 247         num_total = (double) ctx->req_rcvd;
 248         return (ctx->latency_total / num_total);
 249 } /* }}} double context_get_average */
 250
 251 static double context_get_percentile (ping_context_t *ctx, /* {{{ */
 252                 double percentile)
 253 {
 254         double threshold = percentile / 100.0;
 255         uint32_t accumulated[ctx->latency_histogram_size];
 256         double ratios[ctx->latency_histogram_size];
 257         double index_to_ms_factor;
 258         uint32_t num;
 259         size_t i;
 260
 261         if (ctx->latency_histogram == NULL)
 262                 return (NAN);
 263
 264         accumulated[0] = ctx->latency_histogram[0];
 265         for (i = 1; i < ctx->latency_histogram_size; i++)
 266                 accumulated[i] = accumulated[i - 1]
 267                         + ctx->latency_histogram[i];
 268         num = accumulated[ctx->latency_histogram_size - 1];
 269
 270         for (i = 0; i < ctx->latency_histogram_size; i++)
 271         {
 272                 ratios[i] = ((double) accumulated[i]) / ((double) num);
 273                 if (ratios[i] >= threshold)
 274                         break;
 275         }
 276
 277         if (i >= ctx->latency_histogram_size)
 278                 return (NAN);
 279         else if (i == (ctx->latency_histogram_size - 1))
 280                 return (INFINITY);
 281
 282         index_to_ms_factor = (1000.0 * opt_interval) / (ctx->latency_histogram_size - 1);
 283
 284         /* Multiply with i+1, because we're interested in the _upper_ bound of
 285          * each bucket. */
 286         return (index_to_ms_factor * ((double) (i + 1)));
 287 } /* }}} double context_get_percentile */
 288
 289 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 290 {
 291         double num_total;
 292
 293         if (ctx == NULL)
 294                 return (-1.0);
 295
 296         if (ctx->req_rcvd < 1)
 297                 return (-0.0);
 298         else if (ctx->req_rcvd < 2)
 299                 return (0.0);
 300
 301         num_total = (double) ctx->req_rcvd;
 302         return (sqrt (((num_total * ctx->latency_total_square)
 303                                         - (ctx->latency_total * ctx->latency_total))
 304                                 / (num_total * (num_total - 1.0))));
 305 } /* }}} double context_get_stddev */
 306
 307 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 308 {
 309         if (ctx == NULL)
 310                 return (-1.0);
 311
 312         if (ctx->req_sent < 1)
 313                 return (0.0);
 314
 315         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 316                         / ((double) ctx->req_sent));
 317 } /* }}} double context_get_packet_loss */
 318
 319 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 320 {
 321         pingobj_iter_t *iter;
 322         int index;
 323
 324         if (ping == NULL)
 325                 return (EINVAL);
 326
 327         index = 0;
 328         for (iter = ping_iterator_get (ping);
 329                         iter != NULL;
 330                         iter = ping_iterator_next (iter))
 331         {
 332                 ping_context_t *context;
 333                 size_t buffer_size;
 334
 335                 context = context_create ();
 336                 context->index = index;
 337
 338                 buffer_size = sizeof (context->host);
 339                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 340
 341                 buffer_size = sizeof (context->addr);
 342                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 343
 344                 ping_iterator_set_context (iter, (void *) context);
 345
 346                 index++;
 347         }
 348
 349         return (0);
 350 } /* }}} int ping_initialize_contexts */
 351
 352 static void usage_exit (const char *name, int status) /* {{{ */
 353 {
 354         fprintf (stderr, "Usage: %s [OPTIONS] "
 355                                 "-f filename | host [host [host ...]]\n"
 356
 357                         "\nAvailable options:\n"
 358                         "  -4|-6        force the use of IPv4 or IPv6\n"
 359                         "  -c count     number of ICMP packets to send\n"
 360                         "  -i interval  interval with which to send ICMP packets\n"
 361                         "  -t ttl       time to live for each ICMP packet\n"
 362                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 363                         "               Use \"-Q help\" for a list of valid options.\n"
 364                         "  -I srcaddr   source address\n"
 365                         "  -D device    outgoing interface name\n"
 366                         "  -f filename  filename to read hosts from\n"
 367 #if USE_NCURSES
 368                         "  -u / -U      force / disable UTF-8 output\n"
 369 #endif
 370                         "  -P percent   Report the n'th percentile of latency\n"
 371                         "  -Z percent   Exit with non-zero exit status if more than this percentage of\n"
 372                         "               probes timed out. (default: never)\n"
 373
 374                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 375                         "by Florian octo Forster <octo@verplant.org>\n"
 376                         "for contributions see `AUTHORS'\n",
 377                         name);
 378         exit (status);
 379 } /* }}} void usage_exit */
 380
 381 __attribute__((noreturn))
 382 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 383 {
 384         if (arg != 0)
 385                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 386
 387         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 388                         "\n"
 389                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 390                         "\n"
 391                         "    be                     Best Effort (BE, default PHB).\n"
 392                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 393                         "                           (low delay, low loss, low jitter)\n"
 394                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 395                         "                           (capacity-admitted traffic)\n"
 396                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 397                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 398                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 399                         "                           For example: \"cs1\" (priority traffic)\n"
 400                         "\n"
 401                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 402                         "\n"
 403                         "    lowdelay     (%#04x)    minimize delay\n"
 404                         "    throughput   (%#04x)    maximize throughput\n"
 405                         "    reliability  (%#04x)    maximize reliability\n"
 406                         "    mincost      (%#04x)    minimize monetary cost\n"
 407                         "\n"
 408                         "  Specify manually\n"
 409                         "\n"
 410                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 411                         "       0 -  255            Decimal numeric specification.\n"
 412                         "\n",
 413                         (unsigned int) IPTOS_LOWDELAY,
 414                         (unsigned int) IPTOS_THROUGHPUT,
 415                         (unsigned int) IPTOS_RELIABILITY,
 416                         (unsigned int) IPTOS_MINCOST);
 417
 418         exit (status);
 419 } /* }}} void usage_qos_exit */
 420
 421 static int set_opt_send_qos (const char *opt) /* {{{ */
 422 {
 423         if (opt == NULL)
 424                 return (EINVAL);
 425
 426         if (strcasecmp ("help", opt) == 0)
 427                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 428         /* DiffServ (RFC 2474): */
 429         /* - Best effort (BE) */
 430         else if (strcasecmp ("be", opt) == 0)
 431                 opt_send_qos = 0;
 432         /* - Expedited Forwarding (EF, RFC 3246) */
 433         else if (strcasecmp ("ef", opt) == 0)
 434                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 435         /* - Voice Admit (VA, RFC 5865) */
 436         else if (strcasecmp ("va", opt) == 0)
 437                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 438         /* - Assured Forwarding (AF, RFC 2597) */
 439         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 440                         && (strlen (opt) == 4))
 441         {
 442                 uint8_t dscp;
 443                 uint8_t class = 0;
 444                 uint8_t prec = 0;
 445
 446                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 447                 if (opt[2] == '1')
 448                         class = 1;
 449                 else if (opt[2] == '2')
 450                         class = 2;
 451                 else if (opt[2] == '3')
 452                         class = 3;
 453                 else if (opt[2] == '4')
 454                         class = 4;
 455                 else
 456                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 457
 458                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 459                 if (opt[3] == '1')
 460                         prec = 1;
 461                 else if (opt[3] == '2')
 462                         prec = 2;
 463                 else if (opt[3] == '3')
 464                         prec = 3;
 465                 else
 466                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 467
 468                 dscp = (8 * class) + (2 * prec);
 469                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 470                 opt_send_qos = dscp << 2;
 471         }
 472         /* - Class Selector (CS) */
 473         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 474                         && (strlen (opt) == 3))
 475         {
 476                 uint8_t class;
 477
 478                 if ((opt[2] < '0') || (opt[2] > '7'))
 479                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 480
 481                 /* Not exactly legal by the C standard, but I don't know of any
 482                  * system not supporting this hack. */
 483                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 484                 opt_send_qos = class << 5;
 485         }
 486         /* Type of Service (RFC 1349) */
 487         else if (strcasecmp ("lowdelay", opt) == 0)
 488                 opt_send_qos = IPTOS_LOWDELAY;
 489         else if (strcasecmp ("throughput", opt) == 0)
 490                 opt_send_qos = IPTOS_THROUGHPUT;
 491         else if (strcasecmp ("reliability", opt) == 0)
 492                 opt_send_qos = IPTOS_RELIABILITY;
 493         else if (strcasecmp ("mincost", opt) == 0)
 494                 opt_send_qos = IPTOS_MINCOST;
 495         /* Numeric value */
 496         else
 497         {
 498                 unsigned long value;
 499                 char *endptr;
 500
 501                 errno = 0;
 502                 endptr = NULL;
 503                 value = strtoul (opt, &endptr, /* base = */ 0);
 504                 if ((errno != 0) || (endptr == opt)
 505                                 || (endptr == NULL) || (*endptr != 0)
 506                                 || (value > 0xff))
 507                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 508
 509                 opt_send_qos = (uint8_t) value;
 510         }
 511
 512         return (0);
 513 } /* }}} int set_opt_send_qos */
 514
 515 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 516 {
 517         uint8_t dscp;
 518         uint8_t ecn;
 519         char *dscp_str;
 520         char *ecn_str;
 521
 522         dscp = qos >> 2;
 523         ecn = qos & 0x03;
 524
 525         switch (dscp)
 526         {
 527                 case 0x00: dscp_str = "be";  break;
 528                 case 0x2e: dscp_str = "ef";  break;
 529                 case 0x2d: dscp_str = "va";  break;
 530                 case 0x0a: dscp_str = "af11"; break;
 531                 case 0x0c: dscp_str = "af12"; break;
 532                 case 0x0e: dscp_str = "af13"; break;
 533                 case 0x12: dscp_str = "af21"; break;
 534                 case 0x14: dscp_str = "af22"; break;
 535                 case 0x16: dscp_str = "af23"; break;
 536                 case 0x1a: dscp_str = "af31"; break;
 537                 case 0x1c: dscp_str = "af32"; break;
 538                 case 0x1e: dscp_str = "af33"; break;
 539                 case 0x22: dscp_str = "af41"; break;
 540                 case 0x24: dscp_str = "af42"; break;
 541                 case 0x26: dscp_str = "af43"; break;
 542                 case 0x08: dscp_str = "cs1";  break;
 543                 case 0x10: dscp_str = "cs2";  break;
 544                 case 0x18: dscp_str = "cs3";  break;
 545                 case 0x20: dscp_str = "cs4";  break;
 546                 case 0x28: dscp_str = "cs5";  break;
 547                 case 0x30: dscp_str = "cs6";  break;
 548                 case 0x38: dscp_str = "cs7";  break;
 549                 default:   dscp_str = NULL;
 550         }
 551
 552         switch (ecn)
 553         {
 554                 case 0x01: ecn_str = ",ecn(1)"; break;
 555                 case 0x02: ecn_str = ",ecn(0)"; break;
 556                 case 0x03: ecn_str = ",ce"; break;
 557                 default:   ecn_str = "";
 558         }
 559
 560         if (dscp_str == NULL)
 561                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 562         else
 563                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 564         buffer[buffer_size - 1] = 0;
 565
 566         return (buffer);
 567 } /* }}} char *format_qos */
 568
 569 static int read_options (int argc, char **argv) /* {{{ */
 570 {
 571         int optchar;
 572
 573         while (1)
 574         {
 575                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:P:"
 576 #if USE_NCURSES
 577                                 "uU"
 578 #endif
 579                                 );
 580
 581                 if (optchar == -1)
 582                         break;
 583
 584                 switch (optchar)
 585                 {
 586                         case '4':
 587                         case '6':
 588                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 589                                 break;
 590
 591                         case 'c':
 592                                 {
 593                                         int new_count;
 594                                         new_count = atoi (optarg);
 595                                         if (new_count > 0)
 596                                         {
 597                                                 opt_count = new_count;
 598
 599                                                 if ((opt_percentile < 0.0) && (opt_count < 20))
 600                                                         opt_percentile = 100.0 * (opt_count - 1) / opt_count;
 601                                         }
 602                                         else
 603                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 604                                                                 optarg);
 605                                 }
 606                                 break;
 607
 608                         case 'f':
 609                                 {
 610                                         if (opt_filename != NULL)
 611                                                 free (opt_filename);
 612                                         opt_filename = strdup (optarg);
 613                                 }
 614                                 break;
 615
 616                         case 'i':
 617                                 {
 618                                         double new_interval;
 619                                         new_interval = atof (optarg);
 620                                         if (new_interval < 0.001)
 621                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 622                                                                 optarg);
 623                                         else
 624                                                 opt_interval = new_interval;
 625                                 }
 626                                 break;
 627
 628                         case 'I':
 629                                 {
 630                                         if (opt_srcaddr != NULL)
 631                                                 free (opt_srcaddr);
 632                                         opt_srcaddr = strdup (optarg);
 633                                 }
 634                                 break;
 635
 636                         case 'D':
 637                                 opt_device = optarg;
 638                                 break;
 639
 640                         case 't':
 641                         {
 642                                 int new_send_ttl;
 643                                 new_send_ttl = atoi (optarg);
 644                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 645                                         opt_send_ttl = new_send_ttl;
 646                                 else
 647                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 648                                                         optarg);
 649                                 break;
 650                         }
 651
 652                         case 'Q':
 653                                 set_opt_send_qos (optarg);
 654                                 break;
 655
 656                         case 'P':
 657                                 {
 658                                         double new_percentile;
 659                                         new_percentile = atof (optarg);
 660                                         if (isnan (new_percentile)
 661                                                         || (new_percentile < 0.1)
 662                                                         || (new_percentile > 100.0))
 663                                                 fprintf (stderr, "Ignoring invalid percentile: %s\n",
 664                                                                 optarg);
 665                                         else
 666                                                 opt_percentile = new_percentile;
 667                                 }
 668                                 break;
 669
 670 #if USE_NCURSES
 671                         case 'u':
 672                                 opt_utf8 = 2;
 673                                 break;
 674                         case 'U':
 675                                 opt_utf8 = 1;
 676                                 break;
 677 #endif
 678
 679                         case 'Z':
 680                         {
 681                                 char *endptr = NULL;
 682                                 double tmp;
 683
 684                                 errno = 0;
 685                                 tmp = strtod (optarg, &endptr);
 686                                 if ((errno != 0) || (endptr == NULL) || (*endptr != 0) || (tmp < 0.0) || (tmp > 100.0))
 687                                 {
 688                                         fprintf (stderr, "Ignoring invalid -Z argument: %s\n", optarg);
 689                                         fprintf (stderr, "The \"-Z\" option requires a numeric argument between 0 and 100.\n");
 690                                 }
 691                                 else
 692                                         opt_exit_status_threshold = tmp / 100.0;
 693
 694                                 break;
 695                         }
 696
 697                         case 'h':
 698                                 usage_exit (argv[0], 0);
 699                                 break;
 700                         default:
 701                                 usage_exit (argv[0], 1);
 702                 }
 703         }
 704
 705         if (opt_percentile <= 0.0)
 706                 opt_percentile = OPING_DEFAULT_PERCENTILE;
 707
 708         return (optind);
 709 } /* }}} read_options */
 710
 711 static void time_normalize (struct timespec *ts) /* {{{ */
 712 {
 713         while (ts->tv_nsec < 0)
 714         {
 715                 if (ts->tv_sec == 0)
 716                 {
 717                         ts->tv_nsec = 0;
 718                         return;
 719                 }
 720
 721                 ts->tv_sec  -= 1;
 722                 ts->tv_nsec += 1000000000;
 723         }
 724
 725         while (ts->tv_nsec >= 1000000000)
 726         {
 727                 ts->tv_sec  += 1;
 728                 ts->tv_nsec -= 1000000000;
 729         }
 730 } /* }}} void time_normalize */
 731
 732 static void time_calc (struct timespec *ts_dest, /* {{{ */
 733                 const struct timespec *ts_int,
 734                 const struct timeval  *tv_begin,
 735                 const struct timeval  *tv_end)
 736 {
 737         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 738         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 739         time_normalize (ts_dest);
 740
 741         /* Assure that `(begin + interval) > end'.
 742          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 743          * which may be `unsigned. *sigh* */
 744         if ((tv_end->tv_sec > ts_dest->tv_sec)
 745                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 746                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 747         {
 748                 ts_dest->tv_sec  = 0;
 749                 ts_dest->tv_nsec = 0;
 750                 return;
 751         }
 752
 753         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 754         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 755         time_normalize (ts_dest);
 756 } /* }}} void time_calc */
 757
 758 #if USE_NCURSES
 759 static _Bool has_utf8() /* {{{ */
 760 {
 761 # if HAVE_NCURSESW_NCURSES_H
 762         if (!opt_utf8)
 763         {
 764                 /* Automatically determine */
 765                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 766                         opt_utf8 = 2;
 767                 else
 768                         opt_utf8 = 1;
 769         }
 770         return ((_Bool) (opt_utf8 - 1));
 771 # else
 772         return (0);
 773 # endif
 774 } /* }}} _Bool has_utf8 */
 775
 776 static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
 777                 double latency, unsigned int sequence)
 778 {
 779         int color = OPING_RED;
 780         char const *symbol = "!";
 781         int symbolc = '!';
 782
 783         int x_max;
 784         int x_pos;
 785
 786         x_max = getmaxx (ctx->window);
 787         x_pos = ((sequence - 1) % (x_max - 4)) + 2;
 788
 789         if (latency >= 0.0)
 790         {
 791                 double ratio;
 792
 793                 size_t symbols_num = hist_symbols_acs_num;
 794                 size_t colors_num = 1;
 795
 796                 size_t index_symbols;
 797                 size_t index_colors;
 798                 size_t intensity;
 799
 800                 /* latency is in milliseconds, opt_interval is in seconds. */
 801                 ratio = (latency * 0.001) / opt_interval;
 802                 if (ratio > 1) {
 803                         ratio = 1.0;
 804                 }
 805
 806                 if (has_utf8 ())
 807                         symbols_num = hist_symbols_utf8_num;
 808
 809                 if (has_colors () == TRUE)
 810                         colors_num = hist_colors_num;
 811
 812                 intensity = (size_t) (ratio * ((double) (symbols_num * colors_num)));
 813                 if (intensity >= (symbols_num * colors_num))
 814                         intensity = (symbols_num * colors_num) - 1;
 815
 816                 index_symbols = intensity % symbols_num;
 817                 assert (index_symbols < symbols_num);
 818
 819                 index_colors = intensity / symbols_num;
 820                 assert (index_colors < colors_num);
 821
 822                 if (has_utf8())
 823                 {
 824                         color = hist_colors_utf8[index_colors];
 825                         symbol = hist_symbols_utf8[index_symbols];
 826                 }
 827                 else
 828                 {
 829                         color = hist_colors_acs[index_colors];
 830                         symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
 831                 }
 832         }
 833         else /* if (!(latency >= 0.0)) */
 834                 wattron (ctx->window, A_BOLD);
 835
 836         if (has_colors () == TRUE)
 837                 wattron (ctx->window, COLOR_PAIR(color));
 838
 839         if (has_utf8())
 840                 mvwprintw (ctx->window, /* y = */ 3, /* x = */ x_pos, symbol);
 841         else
 842                 mvwaddch (ctx->window, /* y = */ 3, /* x = */ x_pos, symbolc);
 843
 844         if (has_colors () == TRUE)
 845                 wattroff (ctx->window, COLOR_PAIR(color));
 846
 847         /* Use negation here to handle NaN correctly. */
 848         if (!(latency >= 0.0))
 849                 wattroff (ctx->window, A_BOLD);
 850
 851         wprintw (ctx->window, " ");
 852         return (0);
 853 } /* }}} int update_prettyping_graph */
 854
 855 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 856 {
 857         double latency = -1.0;
 858         size_t buffer_len = sizeof (latency);
 859
 860         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 861                         &latency, &buffer_len);
 862
 863         unsigned int sequence = 0;
 864         buffer_len = sizeof (sequence);
 865         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 866                         &sequence, &buffer_len);
 867
 868
 869         if ((ctx == NULL) || (ctx->window == NULL))
 870                 return (EINVAL);
 871
 872         /* werase (ctx->window); */
 873
 874         box (ctx->window, 0, 0);
 875         wattron (ctx->window, A_BOLD);
 876         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 877                         " %s ", ctx->host);
 878         wattroff (ctx->window, A_BOLD);
 879         wprintw (ctx->window, "ping statistics ");
 880         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 881                         "%i packets transmitted, %i received, %.2f%% packet "
 882                         "loss, time %.1fms",
 883                         ctx->req_sent, ctx->req_rcvd,
 884                         context_get_packet_loss (ctx),
 885                         ctx->latency_total);
 886         if (ctx->req_rcvd != 0)
 887         {
 888                 double average;
 889                 double deviation;
 890                 double percentile;
 891
 892                 average = context_get_average (ctx);
 893                 deviation = context_get_stddev (ctx);
 894                 percentile = context_get_percentile (ctx, opt_percentile);
 895
 896                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 897                                 "rtt min/avg/%.0f%%/max/sdev = "
 898                                 "%.3f/%.3f/%.0f/%.3f/%.3f ms\n",
 899                                 opt_percentile,
 900                                 ctx->latency_min,
 901                                 average,
 902                                 percentile,
 903                                 ctx->latency_max,
 904                                 deviation);
 905         }
 906
 907         update_prettyping_graph (ctx, latency, sequence);
 908
 909         wrefresh (ctx->window);
 910
 911         return (0);
 912 } /* }}} int update_stats_from_context */
 913
 914 static int on_resize (pingobj_t *ping) /* {{{ */
 915 {
 916         pingobj_iter_t *iter;
 917         int width = 0;
 918         int height = 0;
 919         int main_win_height;
 920
 921         getmaxyx (stdscr, height, width);
 922         if ((height < 1) || (width < 1))
 923                 return (EINVAL);
 924
 925         main_win_height = height - (5 * host_num);
 926         wresize (main_win, main_win_height, /* width = */ width);
 927         /* Allow scrolling */
 928         scrollok (main_win, TRUE);
 929         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 930         /* Allow hardware accelerated scrolling. */
 931         idlok (main_win, TRUE);
 932         wrefresh (main_win);
 933
 934         for (iter = ping_iterator_get (ping);
 935                         iter != NULL;
 936                         iter = ping_iterator_next (iter))
 937         {
 938                 ping_context_t *context;
 939
 940                 context = ping_iterator_get_context (iter);
 941                 if (context == NULL)
 942                         continue;
 943
 944                 if (context->window != NULL)
 945                 {
 946                         delwin (context->window);
 947                         context->window = NULL;
 948                 }
 949                 context->window = newwin (/* height = */ 5,
 950                                 /* width = */ width,
 951                                 /* y = */ main_win_height + (5 * context->index),
 952                                 /* x = */ 0);
 953         }
 954
 955         return (0);
 956 } /* }}} */
 957
 958 static int check_resize (pingobj_t *ping) /* {{{ */
 959 {
 960         int need_resize = 0;
 961
 962         while (42)
 963         {
 964                 int key = wgetch (stdscr);
 965                 if (key == ERR)
 966                         break;
 967                 else if (key == KEY_RESIZE)
 968                         need_resize = 1;
 969         }
 970
 971         if (need_resize)
 972                 return (on_resize (ping));
 973         else
 974                 return (0);
 975 } /* }}} int check_resize */
 976
 977 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 978 {
 979         pingobj_iter_t *iter;
 980         int width = 0;
 981         int height = 0;
 982         int main_win_height;
 983
 984         initscr ();
 985         cbreak ();
 986         noecho ();
 987         nodelay (stdscr, TRUE);
 988
 989         getmaxyx (stdscr, height, width);
 990         if ((height < 1) || (width < 1))
 991                 return (EINVAL);
 992
 993         if (has_colors () == TRUE)
 994         {
 995                 start_color ();
 996                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 997                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 998                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 999                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
1000                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
1001                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
1002         }
1003
1004         main_win_height = height - (5 * host_num);
1005         main_win = newwin (/* height = */ main_win_height,
1006                         /* width = */ width,
1007                         /* y = */ 0, /* x = */ 0);
1008         /* Allow scrolling */
1009         scrollok (main_win, TRUE);
1010         /* wsetscrreg (main_win, 0, main_win_height - 1); */
1011         /* Allow hardware accelerated scrolling. */
1012         idlok (main_win, TRUE);
1013         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
1014         wrefresh (main_win);
1015
1016         for (iter = ping_iterator_get (ping);
1017                         iter != NULL;
1018                         iter = ping_iterator_next (iter))
1019         {
1020                 ping_context_t *context;
1021
1022                 context = ping_iterator_get_context (iter);
1023                 if (context == NULL)
1024                         continue;
1025
1026                 if (context->window != NULL)
1027                 {
1028                         delwin (context->window);
1029                         context->window = NULL;
1030                 }
1031                 context->window = newwin (/* height = */ 5,
1032                                 /* width = */ width,
1033                                 /* y = */ main_win_height + (5 * context->index),
1034                                 /* x = */ 0);
1035         }
1036
1037
1038         /* Don't know what good this does exactly, but without this code
1039          * "check_resize" will be called right after startup and *somehow*
1040          * this leads to display errors. If we purge all initial characters
1041          * here, the problem goes away. "wgetch" is non-blocking due to
1042          * "nodelay" (see above). */
1043         while (wgetch (stdscr) != ERR)
1044         {
1045                 /* eat up characters */;
1046         }
1047
1048         return (0);
1049 } /* }}} int pre_loop_hook */
1050
1051 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
1052 {
1053         return (check_resize (ping));
1054 } /* }}} int pre_sleep_hook */
1055
1056 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
1057 {
1058         return (check_resize (ping));
1059 } /* }}} int pre_sleep_hook */
1060 #else /* if !USE_NCURSES */
1061 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
1062 {
1063         pingobj_iter_t *iter;
1064
1065         for (iter = ping_iterator_get (ping);
1066                         iter != NULL;
1067                         iter = ping_iterator_next (iter))
1068         {
1069                 ping_context_t *ctx;
1070                 size_t buffer_size;
1071
1072                 ctx = ping_iterator_get_context (iter);
1073                 if (ctx == NULL)
1074                         continue;
1075
1076                 buffer_size = 0;
1077                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
1078
1079                 printf ("PING %s (%s) %zu bytes of data.\n",
1080                                 ctx->host, ctx->addr, buffer_size);
1081         }
1082
1083         return (0);
1084 } /* }}} int pre_loop_hook */
1085
1086 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1087 {
1088         fflush (stdout);
1089
1090         return (0);
1091 } /* }}} int pre_sleep_hook */
1092
1093 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
1094 {
1095         return (0);
1096 } /* }}} int post_sleep_hook */
1097 #endif
1098
1099 static void update_context (ping_context_t *context, double latency) /* {{{ */
1100 {
1101         size_t bucket;
1102
1103         context->req_rcvd++;
1104         context->latency_total += latency;
1105         context->latency_total_square += (latency * latency);
1106
1107         if ((context->latency_max < 0.0) || (context->latency_max < latency))
1108                 context->latency_max = latency;
1109         if ((context->latency_min < 0.0) || (context->latency_min > latency))
1110                 context->latency_min = latency;
1111
1112         if (context->latency_histogram == NULL)
1113                 return;
1114
1115         /* latency is in ms, opt_interval is in s. */
1116         bucket = (size_t) ((latency * (context->latency_histogram_size - 1))
1117                         / (1000.0 * opt_interval));
1118         if (bucket >= context->latency_histogram_size)
1119                 bucket = context->latency_histogram_size - 1;
1120         context->latency_histogram[bucket]++;
1121 } /* }}} void update_context */
1122
1123 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
1124                 __attribute__((unused)) int index)
1125 {
1126         double          latency;
1127         unsigned int    sequence;
1128         int             recv_ttl;
1129         uint8_t         recv_qos;
1130         char            recv_qos_str[16];
1131         size_t          buffer_len;
1132         size_t          data_len;
1133         ping_context_t *context;
1134
1135         latency = -1.0;
1136         buffer_len = sizeof (latency);
1137         ping_iterator_get_info (iter, PING_INFO_LATENCY,
1138                         &latency, &buffer_len);
1139
1140         sequence = 0;
1141         buffer_len = sizeof (sequence);
1142         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
1143                         &sequence, &buffer_len);
1144
1145         recv_ttl = -1;
1146         buffer_len = sizeof (recv_ttl);
1147         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
1148                         &recv_ttl, &buffer_len);
1149
1150         recv_qos = 0;
1151         buffer_len = sizeof (recv_qos);
1152         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1153                         &recv_qos, &buffer_len);
1154
1155         data_len = 0;
1156         ping_iterator_get_info (iter, PING_INFO_DATA,
1157                         NULL, &data_len);
1158
1159         context = (ping_context_t *) ping_iterator_get_context (iter);
1160
1161 #if USE_NCURSES
1162 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1163 #else
1164 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1165 #endif
1166
1167         context->req_sent++;
1168         if (latency > 0.0)
1169         {
1170                 update_context (context, latency);
1171
1172 #if USE_NCURSES
1173                 if (has_colors () == TRUE)
1174                 {
1175                         int color = OPING_GREEN;
1176                         double average = context_get_average (context);
1177                         double stddev = context_get_stddev (context);
1178
1179                         if ((latency < (average - (2 * stddev)))
1180                                         || (latency > (average + (2 * stddev))))
1181                                 color = OPING_RED;
1182                         else if ((latency < (average - stddev))
1183                                         || (latency > (average + stddev)))
1184                                 color = OPING_YELLOW;
1185
1186                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1187                                         data_len, context->host, context->addr,
1188                                         sequence, recv_ttl,
1189                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1190                         if ((recv_qos != 0) || (opt_send_qos != 0))
1191                         {
1192                                 HOST_PRINTF ("qos=%s ",
1193                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1194                         }
1195                         HOST_PRINTF ("time=");
1196                         wattron (main_win, COLOR_PAIR(color));
1197                         HOST_PRINTF ("%.2f", latency);
1198                         wattroff (main_win, COLOR_PAIR(color));
1199                         HOST_PRINTF (" ms\n");
1200                 }
1201                 else
1202                 {
1203 #endif
1204                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1205                                 data_len,
1206                                 context->host, context->addr,
1207                                 sequence, recv_ttl);
1208                 if ((recv_qos != 0) || (opt_send_qos != 0))
1209                 {
1210                         HOST_PRINTF ("qos=%s ",
1211                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1212                 }
1213                 HOST_PRINTF ("time=%.2f ms\n", latency);
1214 #if USE_NCURSES
1215                 }
1216 #endif
1217         }
1218         else
1219         {
1220 #if USE_NCURSES
1221                 if (has_colors () == TRUE)
1222                 {
1223                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1224                                         context->host, context->addr,
1225                                         sequence);
1226                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1227                         HOST_PRINTF ("timeout");
1228                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1229                         HOST_PRINTF ("\n");
1230                 }
1231                 else
1232                 {
1233 #endif
1234                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1235                                 context->host, context->addr,
1236                                 sequence);
1237 #if USE_NCURSES
1238                 }
1239 #endif
1240         }
1241
1242 #if USE_NCURSES
1243         update_stats_from_context (context, iter);
1244         wrefresh (main_win);
1245 #endif
1246 } /* }}} void update_host_hook */
1247
1248 /* Prints statistics for each host, cleans up the contexts and returns the
1249  * number of hosts which failed to return more than the fraction
1250  * opt_exit_status_threshold of pings. */
1251 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1252 {
1253         pingobj_iter_t *iter;
1254         int failure_count = 0;
1255
1256 #if USE_NCURSES
1257         endwin ();
1258 #endif
1259
1260         for (iter = ping_iterator_get (ping);
1261                         iter != NULL;
1262                         iter = ping_iterator_next (iter))
1263         {
1264                 ping_context_t *context;
1265
1266                 context = ping_iterator_get_context (iter);
1267
1268                 printf ("\n--- %s ping statistics ---\n"
1269                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1270                                 context->host, context->req_sent, context->req_rcvd,
1271                                 context_get_packet_loss (context),
1272                                 context->latency_total);
1273
1274                 {
1275                         double pct_failed = 1.0 - (((double) context->req_rcvd)
1276                                         / ((double) context->req_sent));
1277                         if (pct_failed > opt_exit_status_threshold)
1278                                 failure_count++;
1279                 }
1280
1281                 if (context->req_rcvd != 0)
1282                 {
1283                         double average;
1284                         double deviation;
1285                         double percentile;
1286
1287                         average = context_get_average (context);
1288                         deviation = context_get_stddev (context);
1289                         percentile = context_get_percentile (context, opt_percentile);
1290
1291                         printf ("rtt min/avg/%.0f%%/max/sdev = "
1292                                         "%.3f/%.3f/%.0f/%.3f/%.3f ms\n",
1293                                         opt_percentile,
1294                                         context->latency_min,
1295                                         average,
1296                                         percentile,
1297                                         context->latency_max,
1298                                         deviation);
1299                 }
1300
1301                 ping_iterator_set_context (iter, NULL);
1302                 context_destroy (context);
1303         }
1304
1305         return (failure_count);
1306 } /* }}} int post_loop_hook */
1307
1308 int main (int argc, char **argv) /* {{{ */
1309 {
1310         pingobj_t      *ping;
1311         pingobj_iter_t *iter;
1312
1313         struct sigaction sigint_action;
1314
1315         struct timeval  tv_begin;
1316         struct timeval  tv_end;
1317         struct timespec ts_wait;
1318         struct timespec ts_int;
1319
1320         int optind;
1321         int i;
1322         int status;
1323 #if _POSIX_SAVED_IDS
1324         uid_t saved_set_uid;
1325
1326         /* Save the old effective user id */
1327         saved_set_uid = geteuid ();
1328         /* Set the effective user ID to the real user ID without changing the
1329          * saved set-user ID */
1330         status = seteuid (getuid ());
1331         if (status != 0)
1332         {
1333                 fprintf (stderr, "Temporarily dropping privileges "
1334                                 "failed: %s\n", strerror (errno));
1335                 exit (EXIT_FAILURE);
1336         }
1337 #endif
1338
1339         setlocale(LC_ALL, "");
1340         optind = read_options (argc, argv);
1341
1342 #if !_POSIX_SAVED_IDS
1343         /* Cannot temporarily drop privileges -> reject every file but "-". */
1344         if ((opt_filename != NULL)
1345                         && (strcmp ("-", opt_filename) != 0)
1346                         && (getuid () != geteuid ()))
1347         {
1348                 fprintf (stderr, "Your real and effective user IDs don't "
1349                                 "match. Reading from a file (option '-f')\n"
1350                                 "is therefore too risky. You can still read "
1351                                 "from STDIN using '-f -' if you like.\n"
1352                                 "Sorry.\n");
1353                 exit (EXIT_FAILURE);
1354         }
1355 #endif
1356
1357         if ((optind >= argc) && (opt_filename == NULL)) {
1358                 usage_exit (argv[0], 1);
1359         }
1360
1361         if ((ping = ping_construct ()) == NULL)
1362         {
1363                 fprintf (stderr, "ping_construct failed\n");
1364                 return (1);
1365         }
1366
1367         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1368         {
1369                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1370                                 opt_send_ttl, ping_get_error (ping));
1371         }
1372
1373         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1374         {
1375                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1376                                 opt_send_qos, ping_get_error (ping));
1377         }
1378
1379         {
1380                 double temp_sec;
1381                 double temp_nsec;
1382
1383                 temp_nsec = modf (opt_interval, &temp_sec);
1384                 ts_int.tv_sec  = (time_t) temp_sec;
1385                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1386
1387                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1388         }
1389
1390         if (opt_addrfamily != PING_DEF_AF)
1391                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1392
1393         if (opt_srcaddr != NULL)
1394         {
1395                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1396                 {
1397                         fprintf (stderr, "Setting source address failed: %s\n",
1398                                         ping_get_error (ping));
1399                 }
1400         }
1401
1402         if (opt_device != NULL)
1403         {
1404                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1405                 {
1406                         fprintf (stderr, "Setting device failed: %s\n",
1407                                         ping_get_error (ping));
1408                 }
1409         }
1410
1411         if (opt_filename != NULL)
1412         {
1413                 FILE *infile;
1414                 char line[256];
1415                 char host[256];
1416
1417                 if (strcmp (opt_filename, "-") == 0)
1418                         /* Open STDIN */
1419                         infile = fdopen(0, "r");
1420                 else
1421                         infile = fopen(opt_filename, "r");
1422
1423                 if (infile == NULL)
1424                 {
1425                         fprintf (stderr, "Opening %s failed: %s\n",
1426                                         (strcmp (opt_filename, "-") == 0)
1427                                         ? "STDIN" : opt_filename,
1428                                         strerror(errno));
1429                         return (1);
1430                 }
1431
1432 #if _POSIX_SAVED_IDS
1433                 /* Regain privileges */
1434                 status = seteuid (saved_set_uid);
1435                 if (status != 0)
1436                 {
1437                         fprintf (stderr, "Temporarily re-gaining privileges "
1438                                         "failed: %s\n", strerror (errno));
1439                         exit (EXIT_FAILURE);
1440                 }
1441 #endif
1442
1443                 while (fgets(line, sizeof(line), infile))
1444                 {
1445                         /* Strip whitespace */
1446                         if (sscanf(line, "%s", host) != 1)
1447                                 continue;
1448
1449                         if ((host[0] == 0) || (host[0] == '#'))
1450                                 continue;
1451
1452                         if (ping_host_add(ping, host) < 0)
1453                         {
1454                                 const char *errmsg = ping_get_error (ping);
1455
1456                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1457                                 continue;
1458                         }
1459                         else
1460                         {
1461                                 host_num++;
1462                         }
1463                 }
1464
1465 #if _POSIX_SAVED_IDS
1466                 /* Drop privileges */
1467                 status = seteuid (getuid ());
1468                 if (status != 0)
1469                 {
1470                         fprintf (stderr, "Temporarily dropping privileges "
1471                                         "failed: %s\n", strerror (errno));
1472                         exit (EXIT_FAILURE);
1473                 }
1474 #endif
1475
1476                 fclose(infile);
1477         }
1478
1479 #if _POSIX_SAVED_IDS
1480         /* Regain privileges */
1481         status = seteuid (saved_set_uid);
1482         if (status != 0)
1483         {
1484                 fprintf (stderr, "Temporarily re-gaining privileges "
1485                                 "failed: %s\n", strerror (errno));
1486                 exit (EXIT_FAILURE);
1487         }
1488 #endif
1489
1490         for (i = optind; i < argc; i++)
1491         {
1492                 if (ping_host_add (ping, argv[i]) < 0)
1493                 {
1494                         const char *errmsg = ping_get_error (ping);
1495
1496                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1497                         continue;
1498                 }
1499                 else
1500                 {
1501                         host_num++;
1502                 }
1503         }
1504
1505         /* Permanently drop root privileges if we're setuid-root. */
1506         status = setuid (getuid ());
1507         if (status != 0)
1508         {
1509                 fprintf (stderr, "Dropping privileges failed: %s\n",
1510                                 strerror (errno));
1511                 exit (EXIT_FAILURE);
1512         }
1513
1514 #if _POSIX_SAVED_IDS
1515         saved_set_uid = (uid_t) -1;
1516 #endif
1517
1518         ping_initialize_contexts (ping);
1519
1520         if (i == 0)
1521                 return (1);
1522
1523         memset (&sigint_action, '\0', sizeof (sigint_action));
1524         sigint_action.sa_handler = sigint_handler;
1525         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1526         {
1527                 perror ("sigaction");
1528                 return (1);
1529         }
1530
1531         pre_loop_hook (ping);
1532
1533         while (opt_count != 0)
1534         {
1535                 int index;
1536                 int status;
1537
1538                 if (gettimeofday (&tv_begin, NULL) < 0)
1539                 {
1540                         perror ("gettimeofday");
1541                         return (1);
1542                 }
1543
1544                 status = ping_send (ping);
1545                 if (status == -EINTR)
1546                 {
1547                         continue;
1548                 }
1549                 else if (status < 0)
1550                 {
1551                         fprintf (stderr, "ping_send failed: %s\n",
1552                                         ping_get_error (ping));
1553                         return (1);
1554                 }
1555
1556                 index = 0;
1557                 for (iter = ping_iterator_get (ping);
1558                                 iter != NULL;
1559                                 iter = ping_iterator_next (iter))
1560                 {
1561                         update_host_hook (iter, index);
1562                         index++;
1563                 }
1564
1565                 pre_sleep_hook (ping);
1566
1567                 /* Don't sleep in the last iteration */
1568                 if (opt_count == 1)
1569                         break;
1570
1571                 if (gettimeofday (&tv_end, NULL) < 0)
1572                 {
1573                         perror ("gettimeofday");
1574                         return (1);
1575                 }
1576
1577                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1578
1579                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1580                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1581                 {
1582                         if (errno == EINTR)
1583                         {
1584                                 continue;
1585                         }
1586                         else
1587                         {
1588                                 perror ("nanosleep");
1589                                 break;
1590                         }
1591                 }
1592
1593                 post_sleep_hook (ping);
1594
1595                 if (opt_count > 0)
1596                         opt_count--;
1597         } /* while (opt_count != 0) */
1598
1599         /* Returns the number of failed hosts according to -Z. */
1600         status = post_loop_hook (ping);
1601
1602         ping_destroy (ping);
1603
1604         if (status == 0)
1605                 exit (EXIT_SUCCESS);
1606         else
1607         {
1608                 if (status > 255)
1609                         status = 255;
1610                 exit (status);
1611         }
1612 } /* }}} int main */
1613
1614 /* vim: set fdm=marker : */