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