src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  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 #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 /* Remove GNU specific __attribute__ settings when using another compiler */
  93 #if !__GNUC__
  94 # define __attribute__(x) /**/
  95 #endif
  96
  97 typedef struct ping_context
  98 {
  99         char host[NI_MAXHOST];
 100         char addr[NI_MAXHOST];
 101
 102         int index;
 103         int req_sent;
 104         int req_rcvd;
 105
 106         double latency_min;
 107         double latency_max;
 108         double latency_total;
 109         double latency_total_square;
 110
 111 #if USE_NCURSES
 112         WINDOW *window;
 113 #endif
 114 } ping_context_t;
 115
 116 static double  opt_interval   = 1.0;
 117 static int     opt_addrfamily = PING_DEF_AF;
 118 static char   *opt_srcaddr    = NULL;
 119 static char   *opt_device     = NULL;
 120 static char   *opt_filename   = NULL;
 121 static int     opt_count      = -1;
 122 static int     opt_send_ttl   = 64;
 123 static uint8_t opt_send_qos   = 0;
 124
 125 static int host_num = 0;
 126
 127 #if USE_NCURSES
 128 static WINDOW *main_win = NULL;
 129 #endif
 130
 131 static void sigint_handler (int signal) /* {{{ */
 132 {
 133         /* Make compiler happy */
 134         signal = 0;
 135         /* Exit the loop */
 136         opt_count = 0;
 137 } /* }}} void sigint_handler */
 138
 139 static ping_context_t *context_create (void) /* {{{ */
 140 {
 141         ping_context_t *ret;
 142
 143         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 144                 return (NULL);
 145
 146         memset (ret, '\0', sizeof (ping_context_t));
 147
 148         ret->latency_min   = -1.0;
 149         ret->latency_max   = -1.0;
 150         ret->latency_total = 0.0;
 151         ret->latency_total_square = 0.0;
 152
 153 #if USE_NCURSES
 154         ret->window = NULL;
 155 #endif
 156
 157         return (ret);
 158 } /* }}} ping_context_t *context_create */
 159
 160 static void context_destroy (ping_context_t *context) /* {{{ */
 161 {
 162         if (context == NULL)
 163                 return;
 164
 165 #if USE_NCURSES
 166         if (context->window != NULL)
 167         {
 168                 delwin (context->window);
 169                 context->window = NULL;
 170         }
 171 #endif
 172
 173         free (context);
 174 } /* }}} void context_destroy */
 175
 176 static double context_get_average (ping_context_t *ctx) /* {{{ */
 177 {
 178         double num_total;
 179
 180         if (ctx == NULL)
 181                 return (-1.0);
 182
 183         if (ctx->req_rcvd < 1)
 184                 return (-0.0);
 185
 186         num_total = (double) ctx->req_rcvd;
 187         return (ctx->latency_total / num_total);
 188 } /* }}} double context_get_average */
 189
 190 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 191 {
 192         double num_total;
 193
 194         if (ctx == NULL)
 195                 return (-1.0);
 196
 197         if (ctx->req_rcvd < 1)
 198                 return (-0.0);
 199         else if (ctx->req_rcvd < 2)
 200                 return (0.0);
 201
 202         num_total = (double) ctx->req_rcvd;
 203         return (sqrt (((num_total * ctx->latency_total_square)
 204                                         - (ctx->latency_total * ctx->latency_total))
 205                                 / (num_total * (num_total - 1.0))));
 206 } /* }}} double context_get_stddev */
 207
 208 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 209 {
 210         if (ctx == NULL)
 211                 return (-1.0);
 212
 213         if (ctx->req_sent < 1)
 214                 return (0.0);
 215
 216         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 217                         / ((double) ctx->req_sent));
 218 } /* }}} double context_get_packet_loss */
 219
 220 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 221 {
 222         pingobj_iter_t *iter;
 223         int index;
 224
 225         if (ping == NULL)
 226                 return (EINVAL);
 227
 228         index = 0;
 229         for (iter = ping_iterator_get (ping);
 230                         iter != NULL;
 231                         iter = ping_iterator_next (iter))
 232         {
 233                 ping_context_t *context;
 234                 size_t buffer_size;
 235
 236                 context = context_create ();
 237                 context->index = index;
 238
 239                 buffer_size = sizeof (context->host);
 240                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 241
 242                 buffer_size = sizeof (context->addr);
 243                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 244
 245                 ping_iterator_set_context (iter, (void *) context);
 246
 247                 index++;
 248         }
 249
 250         return (0);
 251 } /* }}} int ping_initialize_contexts */
 252
 253 static void usage_exit (const char *name, int status) /* {{{ */
 254 {
 255         fprintf (stderr, "Usage: %s [OPTIONS] "
 256                                 "-f filename | host [host [host ...]]\n"
 257
 258                         "\nAvailable options:\n"
 259                         "  -4|-6        force the use of IPv4 or IPv6\n"
 260                         "  -c count     number of ICMP packets to send\n"
 261                         "  -i interval  interval with which to send ICMP packets\n"
 262                         "  -t ttl       time to live for each ICMP packet\n"
 263                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 264                         "               Use \"-Q help\" for a list of valid options.\n"
 265                         "  -I srcaddr   source address\n"
 266                         "  -D device    outgoing interface name\n"
 267                         "  -f filename  filename to read hosts from\n"
 268
 269                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 270                         "by Florian octo Forster <octo@verplant.org>\n"
 271                         "for contributions see `AUTHORS'\n",
 272                         name);
 273         exit (status);
 274 } /* }}} void usage_exit */
 275
 276 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 277 {
 278         if (arg != 0)
 279                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 280
 281         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 282                         "\n"
 283                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 284                         "\n"
 285                         "    be                     Best Effort (BE, default PHB).\n"
 286                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 287                         "                           (low delay, low loss, low jitter)\n"
 288                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 289                         "                           (capacity-admitted traffic)\n"
 290                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 291                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 292                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 293                         "                           For example: \"cs1\" (priority traffic)\n"
 294                         "\n"
 295                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 296                         "\n"
 297                         "    lowdelay     (%#04x)    minimize delay\n"
 298                         "    throughput   (%#04x)    maximize throughput\n"
 299                         "    reliability  (%#04x)    maximize reliability\n"
 300                         "    mincost      (%#04x)    minimize monetary cost\n"
 301                         "\n"
 302                         "  Specify manually\n"
 303                         "\n"
 304                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 305                         "       0 -  255            Decimal numeric specification.\n"
 306                         "\n",
 307                         (unsigned int) IPTOS_LOWDELAY,
 308                         (unsigned int) IPTOS_THROUGHPUT,
 309                         (unsigned int) IPTOS_RELIABILITY,
 310                         (unsigned int) IPTOS_MINCOST);
 311
 312         exit (status);
 313 } /* }}} void usage_qos_exit */
 314
 315 static int set_opt_send_qos (const char *opt) /* {{{ */
 316 {
 317         if (opt == NULL)
 318                 return (EINVAL);
 319
 320         if (strcasecmp ("help", opt) == 0)
 321                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 322         /* DiffServ (RFC 2474): */
 323         /* - Best effort (BE) */
 324         else if (strcasecmp ("be", opt) == 0)
 325                 opt_send_qos = 0;
 326         /* - Expedited Forwarding (EF, RFC 3246) */
 327         else if (strcasecmp ("ef", opt) == 0)
 328                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 329         /* - Voice Admit (VA, RFC 5865) */
 330         else if (strcasecmp ("va", opt) == 0)
 331                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 332         /* - Assured Forwarding (AF, RFC 2597) */
 333         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 334                         && (strlen (opt) == 4))
 335         {
 336                 uint8_t dscp;
 337                 uint8_t class;
 338                 uint8_t prec;
 339
 340                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 341                 if (opt[2] == '1')
 342                         class = 1;
 343                 else if (opt[2] == '2')
 344                         class = 2;
 345                 else if (opt[2] == '3')
 346                         class = 3;
 347                 else if (opt[2] == '4')
 348                         class = 4;
 349                 else
 350                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 351
 352                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 353                 if (opt[3] == '1')
 354                         prec = 1;
 355                 else if (opt[3] == '2')
 356                         prec = 2;
 357                 else if (opt[3] == '3')
 358                         prec = 3;
 359                 else
 360                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 361
 362                 dscp = (8 * class) + (2 * prec);
 363                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 364                 opt_send_qos = dscp << 2;
 365         }
 366         /* - Class Selector (CS) */
 367         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 368                         && (strlen (opt) == 3))
 369         {
 370                 uint8_t class;
 371
 372                 if ((opt[2] < '0') || (opt[2] > '7'))
 373                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 374
 375                 /* Not exactly legal by the C standard, but I don't know of any
 376                  * system not supporting this hack. */
 377                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 378                 opt_send_qos = class << 5;
 379         }
 380         /* Type of Service (RFC 1349) */
 381         else if (strcasecmp ("lowdelay", opt) == 0)
 382                 opt_send_qos = IPTOS_LOWDELAY;
 383         else if (strcasecmp ("throughput", opt) == 0)
 384                 opt_send_qos = IPTOS_THROUGHPUT;
 385         else if (strcasecmp ("reliability", opt) == 0)
 386                 opt_send_qos = IPTOS_RELIABILITY;
 387         else if (strcasecmp ("mincost", opt) == 0)
 388                 opt_send_qos = IPTOS_MINCOST;
 389         /* Numeric value */
 390         else
 391         {
 392                 unsigned long value;
 393                 char *endptr;
 394
 395                 errno = 0;
 396                 endptr = NULL;
 397                 value = strtoul (opt, &endptr, /* base = */ 0);
 398                 if ((errno != 0) || (endptr == opt)
 399                                 || (endptr == NULL) || (*endptr != 0)
 400                                 || (value > 0xff))
 401                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 402
 403                 opt_send_qos = (uint8_t) value;
 404         }
 405
 406         return (0);
 407 } /* }}} int set_opt_send_qos */
 408
 409 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 410 {
 411         uint8_t dscp;
 412         uint8_t ecn;
 413         char *dscp_str;
 414         char *ecn_str;
 415
 416         dscp = qos >> 2;
 417         ecn = qos & 0x03;
 418
 419         switch (dscp)
 420         {
 421                 case 0x00: dscp_str = "be";  break;
 422                 case 0x2e: dscp_str = "ef";  break;
 423                 case 0x2d: dscp_str = "va";  break;
 424                 case 0x0a: dscp_str = "af11"; break;
 425                 case 0x0c: dscp_str = "af12"; break;
 426                 case 0x0e: dscp_str = "af13"; break;
 427                 case 0x12: dscp_str = "af21"; break;
 428                 case 0x14: dscp_str = "af22"; break;
 429                 case 0x16: dscp_str = "af23"; break;
 430                 case 0x1a: dscp_str = "af31"; break;
 431                 case 0x1c: dscp_str = "af32"; break;
 432                 case 0x1e: dscp_str = "af33"; break;
 433                 case 0x22: dscp_str = "af41"; break;
 434                 case 0x24: dscp_str = "af42"; break;
 435                 case 0x26: dscp_str = "af43"; break;
 436                 case 0x08: dscp_str = "cs1";  break;
 437                 case 0x10: dscp_str = "cs2";  break;
 438                 case 0x18: dscp_str = "cs3";  break;
 439                 case 0x20: dscp_str = "cs4";  break;
 440                 case 0x28: dscp_str = "cs5";  break;
 441                 case 0x30: dscp_str = "cs6";  break;
 442                 case 0x38: dscp_str = "cs7";  break;
 443                 default:   dscp_str = NULL;
 444         }
 445
 446         switch (ecn)
 447         {
 448                 case 0x01: ecn_str = ",ecn(1)"; break;
 449                 case 0x02: ecn_str = ",ecn(0)"; break;
 450                 case 0x03: ecn_str = ",ce"; break;
 451                 default:   ecn_str = "";
 452         }
 453
 454         if (dscp_str == NULL)
 455                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 456         else
 457                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 458         buffer[buffer_size - 1] = 0;
 459
 460         return (buffer);
 461 } /* }}} char *format_qos */
 462
 463 static int read_options (int argc, char **argv) /* {{{ */
 464 {
 465         int optchar;
 466
 467         while (1)
 468         {
 469                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 470
 471                 if (optchar == -1)
 472                         break;
 473
 474                 switch (optchar)
 475                 {
 476                         case '4':
 477                         case '6':
 478                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 479                                 break;
 480
 481                         case 'c':
 482                                 {
 483                                         int new_count;
 484                                         new_count = atoi (optarg);
 485                                         if (new_count > 0)
 486                                                 opt_count = new_count;
 487                                         else
 488                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 489                                                                 optarg);
 490                                 }
 491                                 break;
 492
 493                         case 'f':
 494                                 {
 495                                         if (opt_filename != NULL)
 496                                                 free (opt_filename);
 497                                         opt_filename = strdup (optarg);
 498                                 }
 499                                 break;
 500
 501                         case 'i':
 502                                 {
 503                                         double new_interval;
 504                                         new_interval = atof (optarg);
 505                                         if (new_interval < 0.001)
 506                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 507                                                                 optarg);
 508                                         else
 509                                                 opt_interval = new_interval;
 510                                 }
 511                                 break;
 512                         case 'I':
 513                                 {
 514                                         if (opt_srcaddr != NULL)
 515                                                 free (opt_srcaddr);
 516                                         opt_srcaddr = strdup (optarg);
 517                                 }
 518                                 break;
 519
 520                         case 'D':
 521                                 opt_device = optarg;
 522                                 break;
 523
 524                         case 't':
 525                         {
 526                                 int new_send_ttl;
 527                                 new_send_ttl = atoi (optarg);
 528                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 529                                         opt_send_ttl = new_send_ttl;
 530                                 else
 531                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 532                                                         optarg);
 533                                 break;
 534                         }
 535
 536                         case 'Q':
 537                                 set_opt_send_qos (optarg);
 538                                 break;
 539
 540                         case 'h':
 541                                 usage_exit (argv[0], 0);
 542                                 break;
 543                         default:
 544                                 usage_exit (argv[0], 1);
 545                 }
 546         }
 547
 548         return (optind);
 549 } /* }}} read_options */
 550
 551 static void time_normalize (struct timespec *ts) /* {{{ */
 552 {
 553         while (ts->tv_nsec < 0)
 554         {
 555                 if (ts->tv_sec == 0)
 556                 {
 557                         ts->tv_nsec = 0;
 558                         return;
 559                 }
 560
 561                 ts->tv_sec  -= 1;
 562                 ts->tv_nsec += 1000000000;
 563         }
 564
 565         while (ts->tv_nsec >= 1000000000)
 566         {
 567                 ts->tv_sec  += 1;
 568                 ts->tv_nsec -= 1000000000;
 569         }
 570 } /* }}} void time_normalize */
 571
 572 static void time_calc (struct timespec *ts_dest, /* {{{ */
 573                 const struct timespec *ts_int,
 574                 const struct timeval  *tv_begin,
 575                 const struct timeval  *tv_end)
 576 {
 577         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 578         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 579         time_normalize (ts_dest);
 580
 581         /* Assure that `(begin + interval) > end'.
 582          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 583          * which may be `unsigned. *sigh* */
 584         if ((tv_end->tv_sec > ts_dest->tv_sec)
 585                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 586                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 587         {
 588                 ts_dest->tv_sec  = 0;
 589                 ts_dest->tv_nsec = 0;
 590                 return;
 591         }
 592
 593         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 594         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 595         time_normalize (ts_dest);
 596 } /* }}} void time_calc */
 597
 598 #if USE_NCURSES
 599 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 600 {
 601         if ((ctx == NULL) || (ctx->window == NULL))
 602                 return (EINVAL);
 603
 604         werase (ctx->window);
 605
 606         box (ctx->window, 0, 0);
 607         wattron (ctx->window, A_BOLD);
 608         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 609                         " %s ", ctx->host);
 610         wattroff (ctx->window, A_BOLD);
 611         wprintw (ctx->window, "ping statistics ");
 612         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 613                         "%i packets transmitted, %i received, %.2f%% packet "
 614                         "loss, time %.1fms",
 615                         ctx->req_sent, ctx->req_rcvd,
 616                         context_get_packet_loss (ctx),
 617                         ctx->latency_total);
 618         if (ctx->req_rcvd != 0)
 619         {
 620                 double average;
 621                 double deviation;
 622
 623                 average = context_get_average (ctx);
 624                 deviation = context_get_stddev (ctx);
 625
 626                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 627                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 628                                 ctx->latency_min,
 629                                 average,
 630                                 ctx->latency_max,
 631                                 deviation);
 632         }
 633
 634         wrefresh (ctx->window);
 635
 636         return (0);
 637 } /* }}} int update_stats_from_context */
 638
 639 static int on_resize (pingobj_t *ping) /* {{{ */
 640 {
 641         pingobj_iter_t *iter;
 642         int width = 0;
 643         int height = 0;
 644         int main_win_height;
 645
 646         getmaxyx (stdscr, height, width);
 647         if ((height < 1) || (width < 1))
 648                 return (EINVAL);
 649
 650         main_win_height = height - (4 * host_num);
 651         wresize (main_win, main_win_height, /* width = */ width);
 652         /* Allow scrolling */
 653         scrollok (main_win, TRUE);
 654         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 655         /* Allow hardware accelerated scrolling. */
 656         idlok (main_win, TRUE);
 657         wrefresh (main_win);
 658
 659         for (iter = ping_iterator_get (ping);
 660                         iter != NULL;
 661                         iter = ping_iterator_next (iter))
 662         {
 663                 ping_context_t *context;
 664
 665                 context = ping_iterator_get_context (iter);
 666                 if (context == NULL)
 667                         continue;
 668
 669                 if (context->window != NULL)
 670                 {
 671                         delwin (context->window);
 672                         context->window = NULL;
 673                 }
 674                 context->window = newwin (/* height = */ 4,
 675                                 /* width = */ 0,
 676                                 /* y = */ main_win_height + (4 * context->index),
 677                                 /* x = */ 0);
 678         }
 679
 680         return (0);
 681 } /* }}} */
 682
 683 static int check_resize (pingobj_t *ping) /* {{{ */
 684 {
 685         int need_resize = 0;
 686
 687         while (42)
 688         {
 689                 int key = wgetch (stdscr);
 690                 if (key == ERR)
 691                         break;
 692                 else if (key == KEY_RESIZE)
 693                         need_resize = 1;
 694         }
 695
 696         if (need_resize)
 697                 return (on_resize (ping));
 698         else
 699                 return (0);
 700 } /* }}} int check_resize */
 701
 702 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 703 {
 704         pingobj_iter_t *iter;
 705         int width = 0;
 706         int height = 0;
 707         int main_win_height;
 708
 709         initscr ();
 710         cbreak ();
 711         noecho ();
 712         nodelay (stdscr, TRUE);
 713
 714         getmaxyx (stdscr, height, width);
 715         if ((height < 1) || (width < 1))
 716                 return (EINVAL);
 717
 718         if (has_colors () == TRUE)
 719         {
 720                 start_color ();
 721                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 722                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 723                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 724         }
 725
 726         main_win_height = height - (4 * host_num);
 727         main_win = newwin (/* height = */ main_win_height,
 728                         /* width = */ 0,
 729                         /* y = */ 0, /* x = */ 0);
 730         /* Allow scrolling */
 731         scrollok (main_win, TRUE);
 732         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 733         /* Allow hardware accelerated scrolling. */
 734         idlok (main_win, TRUE);
 735         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 736         wrefresh (main_win);
 737
 738         for (iter = ping_iterator_get (ping);
 739                         iter != NULL;
 740                         iter = ping_iterator_next (iter))
 741         {
 742                 ping_context_t *context;
 743
 744                 context = ping_iterator_get_context (iter);
 745                 if (context == NULL)
 746                         continue;
 747
 748                 if (context->window != NULL)
 749                 {
 750                         delwin (context->window);
 751                         context->window = NULL;
 752                 }
 753                 context->window = newwin (/* height = */ 4,
 754                                 /* width = */ 0,
 755                                 /* y = */ main_win_height + (4 * context->index),
 756                                 /* x = */ 0);
 757         }
 758
 759
 760         /* Don't know what good this does exactly, but without this code
 761          * "check_resize" will be called right after startup and *somehow*
 762          * this leads to display errors. If we purge all initial characters
 763          * here, the problem goes away. "wgetch" is non-blocking due to
 764          * "nodelay" (see above). */
 765         while (wgetch (stdscr) != ERR)
 766         {
 767                 /* eat up characters */;
 768         }
 769
 770         return (0);
 771 } /* }}} int pre_loop_hook */
 772
 773 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 774 {
 775         return (check_resize (ping));
 776 } /* }}} int pre_sleep_hook */
 777
 778 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 779 {
 780         return (check_resize (ping));
 781 } /* }}} int pre_sleep_hook */
 782 #else /* if !USE_NCURSES */
 783 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 784 {
 785         pingobj_iter_t *iter;
 786
 787         for (iter = ping_iterator_get (ping);
 788                         iter != NULL;
 789                         iter = ping_iterator_next (iter))
 790         {
 791                 ping_context_t *ctx;
 792                 size_t buffer_size;
 793
 794                 ctx = ping_iterator_get_context (iter);
 795                 if (ctx == NULL)
 796                         continue;
 797
 798                 buffer_size = 0;
 799                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 800
 801                 printf ("PING %s (%s) %zu bytes of data.\n",
 802                                 ctx->host, ctx->addr, buffer_size);
 803         }
 804
 805         return (0);
 806 } /* }}} int pre_loop_hook */
 807
 808 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 809 {
 810         fflush (stdout);
 811
 812         return (0);
 813 } /* }}} int pre_sleep_hook */
 814
 815 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 816 {
 817         return (0);
 818 } /* }}} int post_sleep_hook */
 819 #endif
 820
 821 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 822                 __attribute__((unused)) int index)
 823 {
 824         double          latency;
 825         unsigned int    sequence;
 826         int             recv_ttl;
 827         uint8_t         recv_qos;
 828         char            recv_qos_str[16];
 829         size_t          buffer_len;
 830         size_t          data_len;
 831         ping_context_t *context;
 832
 833         latency = -1.0;
 834         buffer_len = sizeof (latency);
 835         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 836                         &latency, &buffer_len);
 837
 838         sequence = 0;
 839         buffer_len = sizeof (sequence);
 840         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 841                         &sequence, &buffer_len);
 842
 843         recv_ttl = -1;
 844         buffer_len = sizeof (recv_ttl);
 845         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 846                         &recv_ttl, &buffer_len);
 847
 848         recv_qos = 0;
 849         buffer_len = sizeof (recv_qos);
 850         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 851                         &recv_qos, &buffer_len);
 852
 853         data_len = 0;
 854         ping_iterator_get_info (iter, PING_INFO_DATA,
 855                         NULL, &data_len);
 856
 857         context = (ping_context_t *) ping_iterator_get_context (iter);
 858
 859 #if USE_NCURSES
 860 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 861 #else
 862 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 863 #endif
 864
 865         context->req_sent++;
 866         if (latency > 0.0)
 867         {
 868                 context->req_rcvd++;
 869                 context->latency_total += latency;
 870                 context->latency_total_square += (latency * latency);
 871
 872                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 873                         context->latency_max = latency;
 874                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 875                         context->latency_min = latency;
 876
 877 #if USE_NCURSES
 878                 if (has_colors () == TRUE)
 879                 {
 880                         int color = OPING_GREEN;
 881                         double average = context_get_average (context);
 882                         double stddev = context_get_stddev (context);
 883
 884                         if ((latency < (average - (2 * stddev)))
 885                                         || (latency > (average + (2 * stddev))))
 886                                 color = OPING_RED;
 887                         else if ((latency < (average - stddev))
 888                                         || (latency > (average + stddev)))
 889                                 color = OPING_YELLOW;
 890
 891                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 892                                         data_len, context->host, context->addr,
 893                                         sequence, recv_ttl,
 894                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 895                         if ((recv_qos != 0) || (opt_send_qos != 0))
 896                         {
 897                                 HOST_PRINTF ("qos=%s ",
 898                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 899                         }
 900                         HOST_PRINTF ("time=");
 901                         wattron (main_win, COLOR_PAIR(color));
 902                         HOST_PRINTF ("%.2f", latency);
 903                         wattroff (main_win, COLOR_PAIR(color));
 904                         HOST_PRINTF (" ms\n");
 905                 }
 906                 else
 907                 {
 908 #endif
 909                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 910                                 data_len,
 911                                 context->host, context->addr,
 912                                 sequence, recv_ttl);
 913                 if ((recv_qos != 0) || (opt_send_qos != 0))
 914                 {
 915                         HOST_PRINTF ("qos=%s ",
 916                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 917                 }
 918                 HOST_PRINTF ("time=%.2f ms\n", latency);
 919 #if USE_NCURSES
 920                 }
 921 #endif
 922         }
 923         else
 924         {
 925 #if USE_NCURSES
 926                 if (has_colors () == TRUE)
 927                 {
 928                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 929                                         context->host, context->addr,
 930                                         sequence);
 931                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 932                         HOST_PRINTF ("timeout");
 933                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 934                         HOST_PRINTF ("\n");
 935                 }
 936                 else
 937                 {
 938 #endif
 939                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 940                                 context->host, context->addr,
 941                                 sequence);
 942 #if USE_NCURSES
 943                 }
 944 #endif
 945         }
 946
 947 #if USE_NCURSES
 948         update_stats_from_context (context);
 949         wrefresh (main_win);
 950 #endif
 951 } /* }}} void update_host_hook */
 952
 953 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 954 {
 955         pingobj_iter_t *iter;
 956
 957 #if USE_NCURSES
 958         endwin ();
 959 #endif
 960
 961         for (iter = ping_iterator_get (ping);
 962                         iter != NULL;
 963                         iter = ping_iterator_next (iter))
 964         {
 965                 ping_context_t *context;
 966
 967                 context = ping_iterator_get_context (iter);
 968
 969                 printf ("\n--- %s ping statistics ---\n"
 970                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 971                                 context->host, context->req_sent, context->req_rcvd,
 972                                 context_get_packet_loss (context),
 973                                 context->latency_total);
 974
 975                 if (context->req_rcvd != 0)
 976                 {
 977                         double average;
 978                         double deviation;
 979
 980                         average = context_get_average (context);
 981                         deviation = context_get_stddev (context);
 982
 983                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 984                                         context->latency_min,
 985                                         average,
 986                                         context->latency_max,
 987                                         deviation);
 988                 }
 989
 990                 ping_iterator_set_context (iter, NULL);
 991                 context_destroy (context);
 992         }
 993
 994         return (0);
 995 } /* }}} int post_loop_hook */
 996
 997 int main (int argc, char **argv) /* {{{ */
 998 {
 999         pingobj_t      *ping;
1000         pingobj_iter_t *iter;
1001
1002         struct sigaction sigint_action;
1003
1004         struct timeval  tv_begin;
1005         struct timeval  tv_end;
1006         struct timespec ts_wait;
1007         struct timespec ts_int;
1008
1009         int optind;
1010         int i;
1011         int status;
1012 #if _POSIX_SAVED_IDS
1013         uid_t saved_set_uid;
1014
1015         /* Save the old effective user id */
1016         saved_set_uid = geteuid ();
1017         /* Set the effective user ID to the real user ID without changing the
1018          * saved set-user ID */
1019         status = seteuid (getuid ());
1020         if (status != 0)
1021         {
1022                 fprintf (stderr, "Temporarily dropping privileges "
1023                                 "failed: %s\n", strerror (errno));
1024                 exit (EXIT_FAILURE);
1025         }
1026 #endif
1027
1028         optind = read_options (argc, argv);
1029
1030 #if !_POSIX_SAVED_IDS
1031         /* Cannot temporarily drop privileges -> reject every file but "-". */
1032         if ((opt_filename != NULL)
1033                         && (strcmp ("-", opt_filename) != 0)
1034                         && (getuid () != geteuid ()))
1035         {
1036                 fprintf (stderr, "Your real and effective user IDs don't "
1037                                 "match. Reading from a file (option '-f')\n"
1038                                 "is therefore too risky. You can still read "
1039                                 "from STDIN using '-f -' if you like.\n"
1040                                 "Sorry.\n");
1041                 exit (EXIT_FAILURE);
1042         }
1043 #endif
1044
1045         if ((optind >= argc) && (opt_filename == NULL)) {
1046                 usage_exit (argv[0], 1);
1047         }
1048
1049         if ((ping = ping_construct ()) == NULL)
1050         {
1051                 fprintf (stderr, "ping_construct failed\n");
1052                 return (1);
1053         }
1054
1055         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1056         {
1057                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1058                                 opt_send_ttl, ping_get_error (ping));
1059         }
1060
1061         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1062         {
1063                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1064                                 opt_send_qos, ping_get_error (ping));
1065         }
1066
1067         {
1068                 double temp_sec;
1069                 double temp_nsec;
1070
1071                 temp_nsec = modf (opt_interval, &temp_sec);
1072                 ts_int.tv_sec  = (time_t) temp_sec;
1073                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1074
1075                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1076         }
1077
1078         if (opt_addrfamily != PING_DEF_AF)
1079                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1080
1081         if (opt_srcaddr != NULL)
1082         {
1083                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1084                 {
1085                         fprintf (stderr, "Setting source address failed: %s\n",
1086                                         ping_get_error (ping));
1087                 }
1088         }
1089
1090         if (opt_device != NULL)
1091         {
1092                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1093                 {
1094                         fprintf (stderr, "Setting device failed: %s\n",
1095                                         ping_get_error (ping));
1096                 }
1097         }
1098
1099         if (opt_filename != NULL)
1100         {
1101                 FILE *infile;
1102                 char line[256];
1103                 char host[256];
1104
1105                 if (strcmp (opt_filename, "-") == 0)
1106                         /* Open STDIN */
1107                         infile = fdopen(0, "r");
1108                 else
1109                         infile = fopen(opt_filename, "r");
1110
1111                 if (infile == NULL)
1112                 {
1113                         fprintf (stderr, "Opening %s failed: %s\n",
1114                                         (strcmp (opt_filename, "-") == 0)
1115                                         ? "STDIN" : opt_filename,
1116                                         strerror(errno));
1117                         return (1);
1118                 }
1119
1120 #if _POSIX_SAVED_IDS
1121                 /* Regain privileges */
1122                 status = seteuid (saved_set_uid);
1123                 if (status != 0)
1124                 {
1125                         fprintf (stderr, "Temporarily re-gaining privileges "
1126                                         "failed: %s\n", strerror (errno));
1127                         exit (EXIT_FAILURE);
1128                 }
1129 #endif
1130
1131                 while (fgets(line, sizeof(line), infile))
1132                 {
1133                         /* Strip whitespace */
1134                         if (sscanf(line, "%s", host) != 1)
1135                                 continue;
1136
1137                         if ((host[0] == 0) || (host[0] == '#'))
1138                                 continue;
1139
1140                         if (ping_host_add(ping, host) < 0)
1141                         {
1142                                 const char *errmsg = ping_get_error (ping);
1143
1144                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1145                                 continue;
1146                         }
1147                         else
1148                         {
1149                                 host_num++;
1150                         }
1151                 }
1152
1153 #if _POSIX_SAVED_IDS
1154                 /* Drop privileges */
1155                 status = seteuid (getuid ());
1156                 if (status != 0)
1157                 {
1158                         fprintf (stderr, "Temporarily dropping privileges "
1159                                         "failed: %s\n", strerror (errno));
1160                         exit (EXIT_FAILURE);
1161                 }
1162 #endif
1163
1164                 fclose(infile);
1165         }
1166
1167 #if _POSIX_SAVED_IDS
1168         /* Regain privileges */
1169         status = seteuid (saved_set_uid);
1170         if (status != 0)
1171         {
1172                 fprintf (stderr, "Temporarily re-gaining privileges "
1173                                 "failed: %s\n", strerror (errno));
1174                 exit (EXIT_FAILURE);
1175         }
1176 #endif
1177
1178         for (i = optind; i < argc; i++)
1179         {
1180                 if (ping_host_add (ping, argv[i]) < 0)
1181                 {
1182                         const char *errmsg = ping_get_error (ping);
1183
1184                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1185                         continue;
1186                 }
1187                 else
1188                 {
1189                         host_num++;
1190                 }
1191         }
1192
1193         /* Permanently drop root privileges if we're setuid-root. */
1194         status = setuid (getuid ());
1195         if (status != 0)
1196         {
1197                 fprintf (stderr, "Dropping privileges failed: %s\n",
1198                                 strerror (errno));
1199                 exit (EXIT_FAILURE);
1200         }
1201
1202 #if _POSIX_SAVED_IDS
1203         saved_set_uid = (uid_t) -1;
1204 #endif
1205
1206         ping_initialize_contexts (ping);
1207
1208         if (i == 0)
1209                 return (1);
1210
1211         memset (&sigint_action, '\0', sizeof (sigint_action));
1212         sigint_action.sa_handler = sigint_handler;
1213         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1214         {
1215                 perror ("sigaction");
1216                 return (1);
1217         }
1218
1219         pre_loop_hook (ping);
1220
1221         while (opt_count != 0)
1222         {
1223                 int index;
1224                 int status;
1225
1226                 if (gettimeofday (&tv_begin, NULL) < 0)
1227                 {
1228                         perror ("gettimeofday");
1229                         return (1);
1230                 }
1231
1232                 if (ping_send (ping) < 0)
1233                 {
1234                         fprintf (stderr, "ping_send failed: %s\n",
1235                                         ping_get_error (ping));
1236                         return (1);
1237                 }
1238
1239                 index = 0;
1240                 for (iter = ping_iterator_get (ping);
1241                                 iter != NULL;
1242                                 iter = ping_iterator_next (iter))
1243                 {
1244                         update_host_hook (iter, index);
1245                         index++;
1246                 }
1247
1248                 pre_sleep_hook (ping);
1249
1250                 /* Don't sleep in the last iteration */
1251                 if (opt_count == 1)
1252                         break;
1253
1254                 if (gettimeofday (&tv_end, NULL) < 0)
1255                 {
1256                         perror ("gettimeofday");
1257                         return (1);
1258                 }
1259
1260                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1261
1262                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1263                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1264                 {
1265                         if (errno != EINTR)
1266                         {
1267                                 perror ("nanosleep");
1268                                 break;
1269                         }
1270                         else if (opt_count == 0)
1271                         {
1272                                 /* sigint */
1273                                 break;
1274                         }
1275                 }
1276
1277                 post_sleep_hook (ping);
1278
1279                 if (opt_count > 0)
1280                         opt_count--;
1281         } /* while (opt_count != 0) */
1282
1283         post_loop_hook (ping);
1284
1285         ping_destroy (ping);
1286
1287         return (0);
1288 } /* }}} int main */
1289
1290 /* vim: set fdm=marker : */