src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   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 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 typedef struct ping_context
  93 {
  94         char host[NI_MAXHOST];
  95         char addr[NI_MAXHOST];
  96
  97         int index;
  98         int req_sent;
  99         int req_rcvd;
 100
 101         double latency_min;
 102         double latency_max;
 103         double latency_total;
 104         double latency_total_square;
 105
 106 #if USE_NCURSES
 107         WINDOW *window;
 108 #endif
 109 } ping_context_t;
 110
 111 static double  opt_interval   = 1.0;
 112 static int     opt_addrfamily = PING_DEF_AF;
 113 static char   *opt_srcaddr    = NULL;
 114 static char   *opt_device     = NULL;
 115 static char   *opt_filename   = NULL;
 116 static int     opt_count      = -1;
 117 static int     opt_send_ttl   = 64;
 118 static uint8_t opt_send_qos   = 0;
 119
 120 static int host_num = 0;
 121
 122 #if USE_NCURSES
 123 static WINDOW *main_win = NULL;
 124 #endif
 125
 126 static void sigint_handler (int signal) /* {{{ */
 127 {
 128         /* Make compiler happy */
 129         signal = 0;
 130         /* Exit the loop */
 131         opt_count = 0;
 132 } /* }}} void sigint_handler */
 133
 134 static ping_context_t *context_create (void) /* {{{ */
 135 {
 136         ping_context_t *ret;
 137
 138         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 139                 return (NULL);
 140
 141         memset (ret, '\0', sizeof (ping_context_t));
 142
 143         ret->latency_min   = -1.0;
 144         ret->latency_max   = -1.0;
 145         ret->latency_total = 0.0;
 146         ret->latency_total_square = 0.0;
 147
 148 #if USE_NCURSES
 149         ret->window = NULL;
 150 #endif
 151
 152         return (ret);
 153 } /* }}} ping_context_t *context_create */
 154
 155 static void context_destroy (ping_context_t *context) /* {{{ */
 156 {
 157         if (context == NULL)
 158                 return;
 159
 160 #if USE_NCURSES
 161         if (context->window != NULL)
 162         {
 163                 delwin (context->window);
 164                 context->window = NULL;
 165         }
 166 #endif
 167
 168         free (context);
 169 } /* }}} void context_destroy */
 170
 171 static double context_get_average (ping_context_t *ctx) /* {{{ */
 172 {
 173         double num_total;
 174
 175         if (ctx == NULL)
 176                 return (-1.0);
 177
 178         if (ctx->req_rcvd < 1)
 179                 return (-0.0);
 180
 181         num_total = (double) ctx->req_rcvd;
 182         return (ctx->latency_total / num_total);
 183 } /* }}} double context_get_average */
 184
 185 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 186 {
 187         double num_total;
 188
 189         if (ctx == NULL)
 190                 return (-1.0);
 191
 192         if (ctx->req_rcvd < 1)
 193                 return (-0.0);
 194         else if (ctx->req_rcvd < 2)
 195                 return (0.0);
 196
 197         num_total = (double) ctx->req_rcvd;
 198         return (sqrt (((num_total * ctx->latency_total_square)
 199                                         - (ctx->latency_total * ctx->latency_total))
 200                                 / (num_total * (num_total - 1.0))));
 201 } /* }}} double context_get_stddev */
 202
 203 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 204 {
 205         if (ctx == NULL)
 206                 return (-1.0);
 207
 208         if (ctx->req_sent < 1)
 209                 return (0.0);
 210
 211         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 212                         / ((double) ctx->req_sent));
 213 } /* }}} double context_get_packet_loss */
 214
 215 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 216 {
 217         pingobj_iter_t *iter;
 218         int index;
 219
 220         if (ping == NULL)
 221                 return (EINVAL);
 222
 223         index = 0;
 224         for (iter = ping_iterator_get (ping);
 225                         iter != NULL;
 226                         iter = ping_iterator_next (iter))
 227         {
 228                 ping_context_t *context;
 229                 size_t buffer_size;
 230
 231                 context = context_create ();
 232                 context->index = index;
 233
 234                 buffer_size = sizeof (context->host);
 235                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 236
 237                 buffer_size = sizeof (context->addr);
 238                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 239
 240                 ping_iterator_set_context (iter, (void *) context);
 241
 242                 index++;
 243         }
 244
 245         return (0);
 246 } /* }}} int ping_initialize_contexts */
 247
 248 static void usage_exit (const char *name, int status) /* {{{ */
 249 {
 250         int name_length;
 251
 252         name_length = (int) strlen (name);
 253
 254         fprintf (stderr, "Usage: %s [OPTIONS] "
 255                                 "-f filename | host [host [host ...]]\n"
 256
 257                         "\nAvailable options:\n"
 258                         "  -4|-6        force the use of IPv4 or IPv6\n"
 259                         "  -c count     number of ICMP packets to send\n"
 260                         "  -i interval  interval with which to send ICMP packets\n"
 261                         "  -t ttl       time to live for each ICMP packet\n"
 262                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 263                         "               Use \"-Q help\" for a list of valid options.\n"
 264                         "  -I srcaddr   source address\n"
 265                         "  -D device    outgoing interface name\n"
 266                         "  -f filename  filename to read hosts from\n"
 267
 268                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 269                         "by Florian octo Forster <octo@verplant.org>\n"
 270                         "for contributions see `AUTHORS'\n",
 271                         name);
 272         exit (status);
 273 } /* }}} void usage_exit */
 274
 275 static void usage_tos_exit (const char *arg, int status) /* {{{ */
 276 {
 277         if (arg != 0)
 278                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 279
 280         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 281                         "\n"
 282                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 283                         "\n"
 284                         "    be                     Best Effort (BE, default PHB).\n"
 285                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 286                         "                           (low delay, low loss, low jitter)\n"
 287                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 288                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 289                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 290                         "                           For example: \"cs1\" (priority traffic)\n"
 291                         "\n"
 292                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 293                         "\n"
 294                         "    lowdelay     (%#04x)    minimize delay\n"
 295                         "    throughput   (%#04x)    maximize throughput\n"
 296                         "    reliability  (%#04x)    maximize reliability\n"
 297                         "    mincost      (%#04x)    minimize monetary cost\n"
 298                         "\n"
 299                         "  Specify manually\n"
 300                         "\n"
 301                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 302                         "       0 -  255            Decimal numeric specification.\n"
 303                         "\n",
 304                         (unsigned int) IPTOS_LOWDELAY,
 305                         (unsigned int) IPTOS_THROUGHPUT,
 306                         (unsigned int) IPTOS_RELIABILITY,
 307                         (unsigned int) IPTOS_MINCOST);
 308
 309         exit (status);
 310 } /* }}} void usage_tos_exit */
 311
 312 static int set_opt_send_qos (const char *opt) /* {{{ */
 313 {
 314         if (opt == NULL)
 315                 return (EINVAL);
 316
 317         if (strcasecmp ("help", opt) == 0)
 318                 usage_tos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 319         /* DiffServ (RFC 2474): */
 320         /* - Best effort (BE) */
 321         else if (strcasecmp ("be", opt) == 0)
 322                 opt_send_qos = 0;
 323         /* - Expedited Forwarding (EF, RFC 3246) */
 324         else if (strcasecmp ("ef", opt) == 0)
 325                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 326         /* - Assured Forwarding (AF, RFC 2597) */
 327         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 328                         && (strlen (opt) == 4))
 329         {
 330                 uint8_t dscp;
 331                 uint8_t class;
 332                 uint8_t prec;
 333
 334                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 335                 if (opt[2] == '1')
 336                         class = 1;
 337                 else if (opt[2] == '2')
 338                         class = 2;
 339                 else if (opt[2] == '3')
 340                         class = 3;
 341                 else if (opt[2] == '4')
 342                         class = 4;
 343                 else
 344                         usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 345
 346                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 347                 if (opt[3] == '1')
 348                         prec = 1;
 349                 else if (opt[3] == '2')
 350                         prec = 2;
 351                 else if (opt[3] == '3')
 352                         prec = 3;
 353                 else
 354                         usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 355
 356                 dscp = (8 * class) + (2 * prec);
 357                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 358                 opt_send_qos = dscp << 2;
 359         }
 360         /* - Class Selector (CS) */
 361         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 362                         && (strlen (opt) == 3))
 363         {
 364                 uint8_t class;
 365
 366                 if ((opt[2] < '0') || (opt[2] > '7'))
 367                         usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 368
 369                 /* Not exactly legal by the C standard, but I don't know of any
 370                  * system not supporting this hack. */
 371                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 372                 opt_send_qos = class << 5;
 373         }
 374         /* Type of Service (RFC 1349) */
 375         else if (strcasecmp ("lowdelay", opt) == 0)
 376                 opt_send_qos = IPTOS_LOWDELAY;
 377         else if (strcasecmp ("throughput", opt) == 0)
 378                 opt_send_qos = IPTOS_THROUGHPUT;
 379         else if (strcasecmp ("reliability", opt) == 0)
 380                 opt_send_qos = IPTOS_RELIABILITY;
 381         else if (strcasecmp ("mincost", opt) == 0)
 382                 opt_send_qos = IPTOS_MINCOST;
 383         /* Numeric value */
 384         else
 385         {
 386                 unsigned long value;
 387                 char *endptr;
 388
 389                 errno = 0;
 390                 endptr = NULL;
 391                 value = strtoul (opt, &endptr, /* base = */ 0);
 392                 if ((errno != 0) || (endptr == opt)
 393                                 || (endptr == NULL) || (*endptr != 0)
 394                                 || (value > 0xff))
 395                         usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 396
 397                 opt_send_qos = (uint8_t) value;
 398         }
 399
 400         return (0);
 401 } /* }}} int set_opt_send_qos */
 402
 403 static int read_options (int argc, char **argv) /* {{{ */
 404 {
 405         int optchar;
 406
 407         while (1)
 408         {
 409                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 410
 411                 if (optchar == -1)
 412                         break;
 413
 414                 switch (optchar)
 415                 {
 416                         case '4':
 417                         case '6':
 418                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 419                                 break;
 420
 421                         case 'c':
 422                                 {
 423                                         int new_count;
 424                                         new_count = atoi (optarg);
 425                                         if (new_count > 0)
 426                                                 opt_count = new_count;
 427                                         else
 428                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 429                                                                 optarg);
 430                                 }
 431                                 break;
 432
 433                         case 'f':
 434                                 {
 435                                         if (opt_filename != NULL)
 436                                                 free (opt_filename);
 437                                         opt_filename = strdup (optarg);
 438                                 }
 439                                 break;
 440
 441                         case 'i':
 442                                 {
 443                                         double new_interval;
 444                                         new_interval = atof (optarg);
 445                                         if (new_interval < 0.001)
 446                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 447                                                                 optarg);
 448                                         else
 449                                                 opt_interval = new_interval;
 450                                 }
 451                                 break;
 452                         case 'I':
 453                                 {
 454                                         if (opt_srcaddr != NULL)
 455                                                 free (opt_srcaddr);
 456                                         opt_srcaddr = strdup (optarg);
 457                                 }
 458                                 break;
 459
 460                         case 'D':
 461                                 opt_device = optarg;
 462                                 break;
 463
 464                         case 't':
 465                         {
 466                                 int new_send_ttl;
 467                                 new_send_ttl = atoi (optarg);
 468                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 469                                         opt_send_ttl = new_send_ttl;
 470                                 else
 471                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 472                                                         optarg);
 473                                 break;
 474                         }
 475
 476                         case 'Q':
 477                                 set_opt_send_qos (optarg);
 478                                 break;
 479
 480                         case 'h':
 481                                 usage_exit (argv[0], 0);
 482                                 break;
 483                         default:
 484                                 usage_exit (argv[0], 1);
 485                 }
 486         }
 487
 488         return (optind);
 489 } /* }}} read_options */
 490
 491 static void time_normalize (struct timespec *ts) /* {{{ */
 492 {
 493         while (ts->tv_nsec < 0)
 494         {
 495                 if (ts->tv_sec == 0)
 496                 {
 497                         ts->tv_nsec = 0;
 498                         return;
 499                 }
 500
 501                 ts->tv_sec  -= 1;
 502                 ts->tv_nsec += 1000000000;
 503         }
 504
 505         while (ts->tv_nsec >= 1000000000)
 506         {
 507                 ts->tv_sec  += 1;
 508                 ts->tv_nsec -= 1000000000;
 509         }
 510 } /* }}} void time_normalize */
 511
 512 static void time_calc (struct timespec *ts_dest, /* {{{ */
 513                 const struct timespec *ts_int,
 514                 const struct timeval  *tv_begin,
 515                 const struct timeval  *tv_end)
 516 {
 517         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 518         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 519         time_normalize (ts_dest);
 520
 521         /* Assure that `(begin + interval) > end'.
 522          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 523          * which may be `unsigned. *sigh* */
 524         if ((tv_end->tv_sec > ts_dest->tv_sec)
 525                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 526                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 527         {
 528                 ts_dest->tv_sec  = 0;
 529                 ts_dest->tv_nsec = 0;
 530                 return;
 531         }
 532
 533         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 534         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 535         time_normalize (ts_dest);
 536 } /* }}} void time_calc */
 537
 538 #if USE_NCURSES
 539 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 540 {
 541         if ((ctx == NULL) || (ctx->window == NULL))
 542                 return (EINVAL);
 543
 544         werase (ctx->window);
 545
 546         box (ctx->window, 0, 0);
 547         wattron (ctx->window, A_BOLD);
 548         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 549                         " %s ", ctx->host);
 550         wattroff (ctx->window, A_BOLD);
 551         wprintw (ctx->window, "ping statistics ");
 552         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 553                         "%i packets transmitted, %i received, %.2f%% packet "
 554                         "loss, time %.1fms",
 555                         ctx->req_sent, ctx->req_rcvd,
 556                         context_get_packet_loss (ctx),
 557                         ctx->latency_total);
 558         if (ctx->req_rcvd != 0)
 559         {
 560                 double average;
 561                 double deviation;
 562
 563                 average = context_get_average (ctx);
 564                 deviation = context_get_stddev (ctx);
 565
 566                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 567                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 568                                 ctx->latency_min,
 569                                 average,
 570                                 ctx->latency_max,
 571                                 deviation);
 572         }
 573
 574         wrefresh (ctx->window);
 575
 576         return (0);
 577 } /* }}} int update_stats_from_context */
 578
 579 static int on_resize (pingobj_t *ping) /* {{{ */
 580 {
 581         pingobj_iter_t *iter;
 582         int width = 0;
 583         int height = 0;
 584         int main_win_height;
 585
 586         getmaxyx (stdscr, height, width);
 587         if ((height < 1) || (width < 1))
 588                 return (EINVAL);
 589
 590         main_win_height = height - (4 * host_num);
 591         wresize (main_win, main_win_height, /* width = */ width);
 592         /* Allow scrolling */
 593         scrollok (main_win, TRUE);
 594         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 595         /* Allow hardware accelerated scrolling. */
 596         idlok (main_win, TRUE);
 597         wrefresh (main_win);
 598
 599         for (iter = ping_iterator_get (ping);
 600                         iter != NULL;
 601                         iter = ping_iterator_next (iter))
 602         {
 603                 ping_context_t *context;
 604
 605                 context = ping_iterator_get_context (iter);
 606                 if (context == NULL)
 607                         continue;
 608
 609                 if (context->window != NULL)
 610                 {
 611                         delwin (context->window);
 612                         context->window = NULL;
 613                 }
 614                 context->window = newwin (/* height = */ 4,
 615                                 /* width = */ 0,
 616                                 /* y = */ main_win_height + (4 * context->index),
 617                                 /* x = */ 0);
 618         }
 619
 620         return (0);
 621 } /* }}} */
 622
 623 static int check_resize (pingobj_t *ping) /* {{{ */
 624 {
 625         int need_resize = 0;
 626
 627         while (42)
 628         {
 629                 int key = wgetch (stdscr);
 630                 if (key == ERR)
 631                         break;
 632                 else if (key == KEY_RESIZE)
 633                         need_resize = 1;
 634         }
 635
 636         if (need_resize)
 637                 return (on_resize (ping));
 638         else
 639                 return (0);
 640 } /* }}} int check_resize */
 641
 642 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 643 {
 644         pingobj_iter_t *iter;
 645         int width = 0;
 646         int height = 0;
 647         int main_win_height;
 648
 649         initscr ();
 650         cbreak ();
 651         noecho ();
 652         nodelay (stdscr, TRUE);
 653
 654         getmaxyx (stdscr, height, width);
 655         if ((height < 1) || (width < 1))
 656                 return (EINVAL);
 657
 658         if (has_colors () == TRUE)
 659         {
 660                 start_color ();
 661                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 662                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 663                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 664         }
 665
 666         main_win_height = height - (4 * host_num);
 667         main_win = newwin (/* height = */ main_win_height,
 668                         /* width = */ 0,
 669                         /* y = */ 0, /* x = */ 0);
 670         /* Allow scrolling */
 671         scrollok (main_win, TRUE);
 672         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 673         /* Allow hardware accelerated scrolling. */
 674         idlok (main_win, TRUE);
 675         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 676         wrefresh (main_win);
 677
 678         for (iter = ping_iterator_get (ping);
 679                         iter != NULL;
 680                         iter = ping_iterator_next (iter))
 681         {
 682                 ping_context_t *context;
 683
 684                 context = ping_iterator_get_context (iter);
 685                 if (context == NULL)
 686                         continue;
 687
 688                 if (context->window != NULL)
 689                 {
 690                         delwin (context->window);
 691                         context->window = NULL;
 692                 }
 693                 context->window = newwin (/* height = */ 4,
 694                                 /* width = */ 0,
 695                                 /* y = */ main_win_height + (4 * context->index),
 696                                 /* x = */ 0);
 697         }
 698
 699
 700         /* Don't know what good this does exactly, but without this code
 701          * "check_resize" will be called right after startup and *somehow*
 702          * this leads to display errors. If we purge all initial characters
 703          * here, the problem goes away. "wgetch" is non-blocking due to
 704          * "nodelay" (see above). */
 705         while (wgetch (stdscr) != ERR)
 706         {
 707                 /* eat up characters */;
 708         }
 709
 710         return (0);
 711 } /* }}} int pre_loop_hook */
 712
 713 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 714 {
 715         return (check_resize (ping));
 716 } /* }}} int pre_sleep_hook */
 717
 718 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 719 {
 720         return (check_resize (ping));
 721 } /* }}} int pre_sleep_hook */
 722 #else /* if !USE_NCURSES */
 723 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 724 {
 725         pingobj_iter_t *iter;
 726
 727         for (iter = ping_iterator_get (ping);
 728                         iter != NULL;
 729                         iter = ping_iterator_next (iter))
 730         {
 731                 ping_context_t *ctx;
 732                 size_t buffer_size;
 733
 734                 ctx = ping_iterator_get_context (iter);
 735                 if (ctx == NULL)
 736                         continue;
 737
 738                 buffer_size = 0;
 739                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 740
 741                 printf ("PING %s (%s) %zu bytes of data.\n",
 742                                 ctx->host, ctx->addr, buffer_size);
 743         }
 744
 745         return (0);
 746 } /* }}} int pre_loop_hook */
 747
 748 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 749 {
 750         fflush (stdout);
 751
 752         return (0);
 753 } /* }}} int pre_sleep_hook */
 754
 755 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 756 {
 757         return (0);
 758 } /* }}} int post_sleep_hook */
 759 #endif
 760
 761 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 762                 int index)
 763 {
 764         double          latency;
 765         unsigned int    sequence;
 766         int             recv_ttl;
 767         uint8_t         recv_tos;
 768         size_t          buffer_len;
 769         size_t          data_len;
 770         ping_context_t *context;
 771
 772         latency = -1.0;
 773         buffer_len = sizeof (latency);
 774         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 775                         &latency, &buffer_len);
 776
 777         sequence = 0;
 778         buffer_len = sizeof (sequence);
 779         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 780                         &sequence, &buffer_len);
 781
 782         recv_ttl = -1;
 783         buffer_len = sizeof (recv_ttl);
 784         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 785                         &recv_ttl, &buffer_len);
 786
 787         recv_tos = 0;
 788         buffer_len = sizeof (recv_tos);
 789         ping_iterator_get_info (iter, PING_INFO_RECV_TOS,
 790                         &recv_tos, &buffer_len);
 791
 792         data_len = 0;
 793         ping_iterator_get_info (iter, PING_INFO_DATA,
 794                         NULL, &data_len);
 795
 796         context = (ping_context_t *) ping_iterator_get_context (iter);
 797
 798 #if USE_NCURSES
 799 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 800 #else
 801 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 802 #endif
 803
 804         context->req_sent++;
 805         if (latency > 0.0)
 806         {
 807                 context->req_rcvd++;
 808                 context->latency_total += latency;
 809                 context->latency_total_square += (latency * latency);
 810
 811                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 812                         context->latency_max = latency;
 813                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 814                         context->latency_min = latency;
 815
 816 #if USE_NCURSES
 817                 if (has_colors () == TRUE)
 818                 {
 819                         int color = OPING_GREEN;
 820                         double average = context_get_average (context);
 821                         double stddev = context_get_stddev (context);
 822
 823                         if ((latency < (average - (2 * stddev)))
 824                                         || (latency > (average + (2 * stddev))))
 825                                 color = OPING_RED;
 826                         else if ((latency < (average - stddev))
 827                                         || (latency > (average + stddev)))
 828                                 color = OPING_YELLOW;
 829
 830                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 831                                         " time=",
 832                                         data_len, context->host, context->addr,
 833                                         sequence, recv_ttl, recv_tos);
 834                         wattron (main_win, COLOR_PAIR(color));
 835                         HOST_PRINTF ("%.2f", latency);
 836                         wattroff (main_win, COLOR_PAIR(color));
 837                         HOST_PRINTF (" ms\n");
 838                 }
 839                 else
 840                 {
 841 #endif
 842                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 843                                 " time=%.2f ms\n",
 844                                 data_len,
 845                                 context->host, context->addr,
 846                                 sequence, recv_ttl, recv_tos, latency);
 847 #if USE_NCURSES
 848                 }
 849 #endif
 850         }
 851         else
 852         {
 853 #if USE_NCURSES
 854                 if (has_colors () == TRUE)
 855                 {
 856                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 857                                         context->host, context->addr,
 858                                         sequence);
 859                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 860                         HOST_PRINTF ("timeout");
 861                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 862                         HOST_PRINTF ("\n");
 863                 }
 864                 else
 865                 {
 866 #endif
 867                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 868                                 context->host, context->addr,
 869                                 sequence);
 870 #if USE_NCURSES
 871                 }
 872 #endif
 873         }
 874
 875 #if USE_NCURSES
 876         update_stats_from_context (context);
 877         wrefresh (main_win);
 878 #endif
 879 } /* }}} void update_host_hook */
 880
 881 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 882 {
 883         pingobj_iter_t *iter;
 884
 885 #if USE_NCURSES
 886         endwin ();
 887 #endif
 888
 889         for (iter = ping_iterator_get (ping);
 890                         iter != NULL;
 891                         iter = ping_iterator_next (iter))
 892         {
 893                 ping_context_t *context;
 894
 895                 context = ping_iterator_get_context (iter);
 896
 897                 printf ("\n--- %s ping statistics ---\n"
 898                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 899                                 context->host, context->req_sent, context->req_rcvd,
 900                                 context_get_packet_loss (context),
 901                                 context->latency_total);
 902
 903                 if (context->req_rcvd != 0)
 904                 {
 905                         double average;
 906                         double deviation;
 907
 908                         average = context_get_average (context);
 909                         deviation = context_get_stddev (context);
 910
 911                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 912                                         context->latency_min,
 913                                         average,
 914                                         context->latency_max,
 915                                         deviation);
 916                 }
 917
 918                 ping_iterator_set_context (iter, NULL);
 919                 context_destroy (context);
 920         }
 921
 922         return (0);
 923 } /* }}} int post_loop_hook */
 924
 925 int main (int argc, char **argv) /* {{{ */
 926 {
 927         pingobj_t      *ping;
 928         pingobj_iter_t *iter;
 929
 930         struct sigaction sigint_action;
 931
 932         struct timeval  tv_begin;
 933         struct timeval  tv_end;
 934         struct timespec ts_wait;
 935         struct timespec ts_int;
 936
 937         int optind;
 938         int i;
 939         int status;
 940 #if _POSIX_SAVED_IDS
 941         uid_t saved_set_uid;
 942
 943         /* Save the old effective user id */
 944         saved_set_uid = geteuid ();
 945         /* Set the effective user ID to the real user ID without changing the
 946          * saved set-user ID */
 947         status = seteuid (getuid ());
 948         if (status != 0)
 949         {
 950                 fprintf (stderr, "Temporarily dropping privileges "
 951                                 "failed: %s\n", strerror (errno));
 952                 exit (EXIT_FAILURE);
 953         }
 954 #endif
 955
 956         optind = read_options (argc, argv);
 957
 958 #if !_POSIX_SAVED_IDS
 959         /* Cannot temporarily drop privileges -> reject every file but "-". */
 960         if ((opt_filename != NULL)
 961                         && (strcmp ("-", opt_filename) != 0)
 962                         && (getuid () != geteuid ()))
 963         {
 964                 fprintf (stderr, "Your real and effective user IDs don't "
 965                                 "match. Reading from a file (option '-f')\n"
 966                                 "is therefore too risky. You can still read "
 967                                 "from STDIN using '-f -' if you like.\n"
 968                                 "Sorry.\n");
 969                 exit (EXIT_FAILURE);
 970         }
 971 #endif
 972
 973         if ((optind >= argc) && (opt_filename == NULL)) {
 974                 usage_exit (argv[0], 1);
 975         }
 976
 977         if ((ping = ping_construct ()) == NULL)
 978         {
 979                 fprintf (stderr, "ping_construct failed\n");
 980                 return (1);
 981         }
 982
 983         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 984         {
 985                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 986                                 opt_send_ttl, ping_get_error (ping));
 987         }
 988
 989         if (ping_setopt (ping, PING_OPT_TOS, &opt_send_qos) != 0)
 990         {
 991                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
 992                                 opt_send_qos, ping_get_error (ping));
 993         }
 994
 995         {
 996                 double temp_sec;
 997                 double temp_nsec;
 998
 999                 temp_nsec = modf (opt_interval, &temp_sec);
1000                 ts_int.tv_sec  = (time_t) temp_sec;
1001                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1002
1003                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1004         }
1005
1006         if (opt_addrfamily != PING_DEF_AF)
1007                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1008
1009         if (opt_srcaddr != NULL)
1010         {
1011                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1012                 {
1013                         fprintf (stderr, "Setting source address failed: %s\n",
1014                                         ping_get_error (ping));
1015                 }
1016         }
1017
1018         if (opt_device != NULL)
1019         {
1020                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1021                 {
1022                         fprintf (stderr, "Setting device failed: %s\n",
1023                                         ping_get_error (ping));
1024                 }
1025         }
1026
1027         if (opt_filename != NULL)
1028         {
1029                 FILE *infile;
1030                 char line[256];
1031                 char host[256];
1032
1033                 if (strcmp (opt_filename, "-") == 0)
1034                         /* Open STDIN */
1035                         infile = fdopen(0, "r");
1036                 else
1037                         infile = fopen(opt_filename, "r");
1038
1039                 if (infile == NULL)
1040                 {
1041                         fprintf (stderr, "Opening %s failed: %s\n",
1042                                         (strcmp (opt_filename, "-") == 0)
1043                                         ? "STDIN" : opt_filename,
1044                                         strerror(errno));
1045                         return (1);
1046                 }
1047
1048 #if _POSIX_SAVED_IDS
1049                 /* Regain privileges */
1050                 status = seteuid (saved_set_uid);
1051                 if (status != 0)
1052                 {
1053                         fprintf (stderr, "Temporarily re-gaining privileges "
1054                                         "failed: %s\n", strerror (errno));
1055                         exit (EXIT_FAILURE);
1056                 }
1057 #endif
1058
1059                 while (fgets(line, sizeof(line), infile))
1060                 {
1061                         /* Strip whitespace */
1062                         if (sscanf(line, "%s", host) != 1)
1063                                 continue;
1064
1065                         if ((host[0] == 0) || (host[0] == '#'))
1066                                 continue;
1067
1068                         if (ping_host_add(ping, host) < 0)
1069                         {
1070                                 const char *errmsg = ping_get_error (ping);
1071
1072                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1073                                 continue;
1074                         }
1075                         else
1076                         {
1077                                 host_num++;
1078                         }
1079                 }
1080
1081 #if _POSIX_SAVED_IDS
1082                 /* Drop privileges */
1083                 status = seteuid (getuid ());
1084                 if (status != 0)
1085                 {
1086                         fprintf (stderr, "Temporarily dropping privileges "
1087                                         "failed: %s\n", strerror (errno));
1088                         exit (EXIT_FAILURE);
1089                 }
1090 #endif
1091
1092                 fclose(infile);
1093         }
1094
1095 #if _POSIX_SAVED_IDS
1096         /* Regain privileges */
1097         status = seteuid (saved_set_uid);
1098         if (status != 0)
1099         {
1100                 fprintf (stderr, "Temporarily re-gaining privileges "
1101                                 "failed: %s\n", strerror (errno));
1102                 exit (EXIT_FAILURE);
1103         }
1104 #endif
1105
1106         for (i = optind; i < argc; i++)
1107         {
1108                 if (ping_host_add (ping, argv[i]) < 0)
1109                 {
1110                         const char *errmsg = ping_get_error (ping);
1111
1112                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1113                         continue;
1114                 }
1115                 else
1116                 {
1117                         host_num++;
1118                 }
1119         }
1120
1121         /* Permanently drop root privileges if we're setuid-root. */
1122         status = setuid (getuid ());
1123         if (status != 0)
1124         {
1125                 fprintf (stderr, "Dropping privileges failed: %s\n",
1126                                 strerror (errno));
1127                 exit (EXIT_FAILURE);
1128         }
1129
1130 #if _POSIX_SAVED_IDS
1131         saved_set_uid = (uid_t) -1;
1132 #endif
1133
1134         ping_initialize_contexts (ping);
1135
1136         if (i == 0)
1137                 return (1);
1138
1139         memset (&sigint_action, '\0', sizeof (sigint_action));
1140         sigint_action.sa_handler = sigint_handler;
1141         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1142         {
1143                 perror ("sigaction");
1144                 return (1);
1145         }
1146
1147         pre_loop_hook (ping);
1148
1149         while (opt_count != 0)
1150         {
1151                 int index;
1152                 int status;
1153
1154                 if (gettimeofday (&tv_begin, NULL) < 0)
1155                 {
1156                         perror ("gettimeofday");
1157                         return (1);
1158                 }
1159
1160                 if (ping_send (ping) < 0)
1161                 {
1162                         fprintf (stderr, "ping_send failed: %s\n",
1163                                         ping_get_error (ping));
1164                         return (1);
1165                 }
1166
1167                 index = 0;
1168                 for (iter = ping_iterator_get (ping);
1169                                 iter != NULL;
1170                                 iter = ping_iterator_next (iter))
1171                 {
1172                         update_host_hook (iter, index);
1173                         index++;
1174                 }
1175
1176                 pre_sleep_hook (ping);
1177
1178                 /* Don't sleep in the last iteration */
1179                 if (opt_count == 1)
1180                         break;
1181
1182                 if (gettimeofday (&tv_end, NULL) < 0)
1183                 {
1184                         perror ("gettimeofday");
1185                         return (1);
1186                 }
1187
1188                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1189
1190                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1191                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1192                 {
1193                         if (errno != EINTR)
1194                         {
1195                                 perror ("nanosleep");
1196                                 break;
1197                         }
1198                         else if (opt_count == 0)
1199                         {
1200                                 /* sigint */
1201                                 break;
1202                         }
1203                 }
1204
1205                 post_sleep_hook (ping);
1206
1207                 if (opt_count > 0)
1208                         opt_count--;
1209         } /* while (opt_count != 0) */
1210
1211         post_loop_hook (ping);
1212
1213         ping_destroy (ping);
1214
1215         return (0);
1216 } /* }}} int main */
1217
1218 /* vim: set fdm=marker : */