src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #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 __attribute__((noreturn))
 277 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 278 {
 279         if (arg != 0)
 280                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 281
 282         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 283                         "\n"
 284                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 285                         "\n"
 286                         "    be                     Best Effort (BE, default PHB).\n"
 287                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 288                         "                           (low delay, low loss, low jitter)\n"
 289                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 290                         "                           (capacity-admitted traffic)\n"
 291                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 292                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 293                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 294                         "                           For example: \"cs1\" (priority traffic)\n"
 295                         "\n"
 296                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 297                         "\n"
 298                         "    lowdelay     (%#04x)    minimize delay\n"
 299                         "    throughput   (%#04x)    maximize throughput\n"
 300                         "    reliability  (%#04x)    maximize reliability\n"
 301                         "    mincost      (%#04x)    minimize monetary cost\n"
 302                         "\n"
 303                         "  Specify manually\n"
 304                         "\n"
 305                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 306                         "       0 -  255            Decimal numeric specification.\n"
 307                         "\n",
 308                         (unsigned int) IPTOS_LOWDELAY,
 309                         (unsigned int) IPTOS_THROUGHPUT,
 310                         (unsigned int) IPTOS_RELIABILITY,
 311                         (unsigned int) IPTOS_MINCOST);
 312
 313         exit (status);
 314 } /* }}} void usage_qos_exit */
 315
 316 static int set_opt_send_qos (const char *opt) /* {{{ */
 317 {
 318         if (opt == NULL)
 319                 return (EINVAL);
 320
 321         if (strcasecmp ("help", opt) == 0)
 322                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 323         /* DiffServ (RFC 2474): */
 324         /* - Best effort (BE) */
 325         else if (strcasecmp ("be", opt) == 0)
 326                 opt_send_qos = 0;
 327         /* - Expedited Forwarding (EF, RFC 3246) */
 328         else if (strcasecmp ("ef", opt) == 0)
 329                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 330         /* - Voice Admit (VA, RFC 5865) */
 331         else if (strcasecmp ("va", opt) == 0)
 332                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 333         /* - Assured Forwarding (AF, RFC 2597) */
 334         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 335                         && (strlen (opt) == 4))
 336         {
 337                 uint8_t dscp;
 338                 uint8_t class = 0;
 339                 uint8_t prec = 0;
 340
 341                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 342                 if (opt[2] == '1')
 343                         class = 1;
 344                 else if (opt[2] == '2')
 345                         class = 2;
 346                 else if (opt[2] == '3')
 347                         class = 3;
 348                 else if (opt[2] == '4')
 349                         class = 4;
 350                 else
 351                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 352
 353                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 354                 if (opt[3] == '1')
 355                         prec = 1;
 356                 else if (opt[3] == '2')
 357                         prec = 2;
 358                 else if (opt[3] == '3')
 359                         prec = 3;
 360                 else
 361                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 362
 363                 dscp = (8 * class) + (2 * prec);
 364                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 365                 opt_send_qos = dscp << 2;
 366         }
 367         /* - Class Selector (CS) */
 368         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 369                         && (strlen (opt) == 3))
 370         {
 371                 uint8_t class;
 372
 373                 if ((opt[2] < '0') || (opt[2] > '7'))
 374                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 375
 376                 /* Not exactly legal by the C standard, but I don't know of any
 377                  * system not supporting this hack. */
 378                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 379                 opt_send_qos = class << 5;
 380         }
 381         /* Type of Service (RFC 1349) */
 382         else if (strcasecmp ("lowdelay", opt) == 0)
 383                 opt_send_qos = IPTOS_LOWDELAY;
 384         else if (strcasecmp ("throughput", opt) == 0)
 385                 opt_send_qos = IPTOS_THROUGHPUT;
 386         else if (strcasecmp ("reliability", opt) == 0)
 387                 opt_send_qos = IPTOS_RELIABILITY;
 388         else if (strcasecmp ("mincost", opt) == 0)
 389                 opt_send_qos = IPTOS_MINCOST;
 390         /* Numeric value */
 391         else
 392         {
 393                 unsigned long value;
 394                 char *endptr;
 395
 396                 errno = 0;
 397                 endptr = NULL;
 398                 value = strtoul (opt, &endptr, /* base = */ 0);
 399                 if ((errno != 0) || (endptr == opt)
 400                                 || (endptr == NULL) || (*endptr != 0)
 401                                 || (value > 0xff))
 402                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 403
 404                 opt_send_qos = (uint8_t) value;
 405         }
 406
 407         return (0);
 408 } /* }}} int set_opt_send_qos */
 409
 410 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 411 {
 412         uint8_t dscp;
 413         uint8_t ecn;
 414         char *dscp_str;
 415         char *ecn_str;
 416
 417         dscp = qos >> 2;
 418         ecn = qos & 0x03;
 419
 420         switch (dscp)
 421         {
 422                 case 0x00: dscp_str = "be";  break;
 423                 case 0x2e: dscp_str = "ef";  break;
 424                 case 0x2d: dscp_str = "va";  break;
 425                 case 0x0a: dscp_str = "af11"; break;
 426                 case 0x0c: dscp_str = "af12"; break;
 427                 case 0x0e: dscp_str = "af13"; break;
 428                 case 0x12: dscp_str = "af21"; break;
 429                 case 0x14: dscp_str = "af22"; break;
 430                 case 0x16: dscp_str = "af23"; break;
 431                 case 0x1a: dscp_str = "af31"; break;
 432                 case 0x1c: dscp_str = "af32"; break;
 433                 case 0x1e: dscp_str = "af33"; break;
 434                 case 0x22: dscp_str = "af41"; break;
 435                 case 0x24: dscp_str = "af42"; break;
 436                 case 0x26: dscp_str = "af43"; break;
 437                 case 0x08: dscp_str = "cs1";  break;
 438                 case 0x10: dscp_str = "cs2";  break;
 439                 case 0x18: dscp_str = "cs3";  break;
 440                 case 0x20: dscp_str = "cs4";  break;
 441                 case 0x28: dscp_str = "cs5";  break;
 442                 case 0x30: dscp_str = "cs6";  break;
 443                 case 0x38: dscp_str = "cs7";  break;
 444                 default:   dscp_str = NULL;
 445         }
 446
 447         switch (ecn)
 448         {
 449                 case 0x01: ecn_str = ",ecn(1)"; break;
 450                 case 0x02: ecn_str = ",ecn(0)"; break;
 451                 case 0x03: ecn_str = ",ce"; break;
 452                 default:   ecn_str = "";
 453         }
 454
 455         if (dscp_str == NULL)
 456                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 457         else
 458                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 459         buffer[buffer_size - 1] = 0;
 460
 461         return (buffer);
 462 } /* }}} char *format_qos */
 463
 464 static int read_options (int argc, char **argv) /* {{{ */
 465 {
 466         int optchar;
 467
 468         while (1)
 469         {
 470                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 471
 472                 if (optchar == -1)
 473                         break;
 474
 475                 switch (optchar)
 476                 {
 477                         case '4':
 478                         case '6':
 479                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 480                                 break;
 481
 482                         case 'c':
 483                                 {
 484                                         int new_count;
 485                                         new_count = atoi (optarg);
 486                                         if (new_count > 0)
 487                                                 opt_count = new_count;
 488                                         else
 489                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 490                                                                 optarg);
 491                                 }
 492                                 break;
 493
 494                         case 'f':
 495                                 {
 496                                         if (opt_filename != NULL)
 497                                                 free (opt_filename);
 498                                         opt_filename = strdup (optarg);
 499                                 }
 500                                 break;
 501
 502                         case 'i':
 503                                 {
 504                                         double new_interval;
 505                                         new_interval = atof (optarg);
 506                                         if (new_interval < 0.001)
 507                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 508                                                                 optarg);
 509                                         else
 510                                                 opt_interval = new_interval;
 511                                 }
 512                                 break;
 513                         case 'I':
 514                                 {
 515                                         if (opt_srcaddr != NULL)
 516                                                 free (opt_srcaddr);
 517                                         opt_srcaddr = strdup (optarg);
 518                                 }
 519                                 break;
 520
 521                         case 'D':
 522                                 opt_device = optarg;
 523                                 break;
 524
 525                         case 't':
 526                         {
 527                                 int new_send_ttl;
 528                                 new_send_ttl = atoi (optarg);
 529                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 530                                         opt_send_ttl = new_send_ttl;
 531                                 else
 532                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 533                                                         optarg);
 534                                 break;
 535                         }
 536
 537                         case 'Q':
 538                                 set_opt_send_qos (optarg);
 539                                 break;
 540
 541                         case 'h':
 542                                 usage_exit (argv[0], 0);
 543                                 break;
 544                         default:
 545                                 usage_exit (argv[0], 1);
 546                 }
 547         }
 548
 549         return (optind);
 550 } /* }}} read_options */
 551
 552 static void time_normalize (struct timespec *ts) /* {{{ */
 553 {
 554         while (ts->tv_nsec < 0)
 555         {
 556                 if (ts->tv_sec == 0)
 557                 {
 558                         ts->tv_nsec = 0;
 559                         return;
 560                 }
 561
 562                 ts->tv_sec  -= 1;
 563                 ts->tv_nsec += 1000000000;
 564         }
 565
 566         while (ts->tv_nsec >= 1000000000)
 567         {
 568                 ts->tv_sec  += 1;
 569                 ts->tv_nsec -= 1000000000;
 570         }
 571 } /* }}} void time_normalize */
 572
 573 static void time_calc (struct timespec *ts_dest, /* {{{ */
 574                 const struct timespec *ts_int,
 575                 const struct timeval  *tv_begin,
 576                 const struct timeval  *tv_end)
 577 {
 578         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 579         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 580         time_normalize (ts_dest);
 581
 582         /* Assure that `(begin + interval) > end'.
 583          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 584          * which may be `unsigned. *sigh* */
 585         if ((tv_end->tv_sec > ts_dest->tv_sec)
 586                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 587                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 588         {
 589                 ts_dest->tv_sec  = 0;
 590                 ts_dest->tv_nsec = 0;
 591                 return;
 592         }
 593
 594         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 595         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 596         time_normalize (ts_dest);
 597 } /* }}} void time_calc */
 598
 599 #if USE_NCURSES
 600 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 601 {
 602         if ((ctx == NULL) || (ctx->window == NULL))
 603                 return (EINVAL);
 604
 605         werase (ctx->window);
 606
 607         box (ctx->window, 0, 0);
 608         wattron (ctx->window, A_BOLD);
 609         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 610                         " %s ", ctx->host);
 611         wattroff (ctx->window, A_BOLD);
 612         wprintw (ctx->window, "ping statistics ");
 613         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 614                         "%i packets transmitted, %i received, %.2f%% packet "
 615                         "loss, time %.1fms",
 616                         ctx->req_sent, ctx->req_rcvd,
 617                         context_get_packet_loss (ctx),
 618                         ctx->latency_total);
 619         if (ctx->req_rcvd != 0)
 620         {
 621                 double average;
 622                 double deviation;
 623
 624                 average = context_get_average (ctx);
 625                 deviation = context_get_stddev (ctx);
 626
 627                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 628                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 629                                 ctx->latency_min,
 630                                 average,
 631                                 ctx->latency_max,
 632                                 deviation);
 633         }
 634
 635         wrefresh (ctx->window);
 636
 637         return (0);
 638 } /* }}} int update_stats_from_context */
 639
 640 static int on_resize (pingobj_t *ping) /* {{{ */
 641 {
 642         pingobj_iter_t *iter;
 643         int width = 0;
 644         int height = 0;
 645         int main_win_height;
 646
 647         getmaxyx (stdscr, height, width);
 648         if ((height < 1) || (width < 1))
 649                 return (EINVAL);
 650
 651         main_win_height = height - (4 * host_num);
 652         wresize (main_win, main_win_height, /* width = */ width);
 653         /* Allow scrolling */
 654         scrollok (main_win, TRUE);
 655         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 656         /* Allow hardware accelerated scrolling. */
 657         idlok (main_win, TRUE);
 658         wrefresh (main_win);
 659
 660         for (iter = ping_iterator_get (ping);
 661                         iter != NULL;
 662                         iter = ping_iterator_next (iter))
 663         {
 664                 ping_context_t *context;
 665
 666                 context = ping_iterator_get_context (iter);
 667                 if (context == NULL)
 668                         continue;
 669
 670                 if (context->window != NULL)
 671                 {
 672                         delwin (context->window);
 673                         context->window = NULL;
 674                 }
 675                 context->window = newwin (/* height = */ 4,
 676                                 /* width = */ width,
 677                                 /* y = */ main_win_height + (4 * context->index),
 678                                 /* x = */ 0);
 679         }
 680
 681         return (0);
 682 } /* }}} */
 683
 684 static int check_resize (pingobj_t *ping) /* {{{ */
 685 {
 686         int need_resize = 0;
 687
 688         while (42)
 689         {
 690                 int key = wgetch (stdscr);
 691                 if (key == ERR)
 692                         break;
 693                 else if (key == KEY_RESIZE)
 694                         need_resize = 1;
 695         }
 696
 697         if (need_resize)
 698                 return (on_resize (ping));
 699         else
 700                 return (0);
 701 } /* }}} int check_resize */
 702
 703 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 704 {
 705         pingobj_iter_t *iter;
 706         int width = 0;
 707         int height = 0;
 708         int main_win_height;
 709
 710         initscr ();
 711         cbreak ();
 712         noecho ();
 713         nodelay (stdscr, TRUE);
 714
 715         getmaxyx (stdscr, height, width);
 716         if ((height < 1) || (width < 1))
 717                 return (EINVAL);
 718
 719         if (has_colors () == TRUE)
 720         {
 721                 start_color ();
 722                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 723                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 724                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 725         }
 726
 727         main_win_height = height - (4 * host_num);
 728         main_win = newwin (/* height = */ main_win_height,
 729                         /* width = */ width,
 730                         /* y = */ 0, /* x = */ 0);
 731         /* Allow scrolling */
 732         scrollok (main_win, TRUE);
 733         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 734         /* Allow hardware accelerated scrolling. */
 735         idlok (main_win, TRUE);
 736         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 737         wrefresh (main_win);
 738
 739         for (iter = ping_iterator_get (ping);
 740                         iter != NULL;
 741                         iter = ping_iterator_next (iter))
 742         {
 743                 ping_context_t *context;
 744
 745                 context = ping_iterator_get_context (iter);
 746                 if (context == NULL)
 747                         continue;
 748
 749                 if (context->window != NULL)
 750                 {
 751                         delwin (context->window);
 752                         context->window = NULL;
 753                 }
 754                 context->window = newwin (/* height = */ 4,
 755                                 /* width = */ width,
 756                                 /* y = */ main_win_height + (4 * context->index),
 757                                 /* x = */ 0);
 758         }
 759
 760
 761         /* Don't know what good this does exactly, but without this code
 762          * "check_resize" will be called right after startup and *somehow*
 763          * this leads to display errors. If we purge all initial characters
 764          * here, the problem goes away. "wgetch" is non-blocking due to
 765          * "nodelay" (see above). */
 766         while (wgetch (stdscr) != ERR)
 767         {
 768                 /* eat up characters */;
 769         }
 770
 771         return (0);
 772 } /* }}} int pre_loop_hook */
 773
 774 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 775 {
 776         return (check_resize (ping));
 777 } /* }}} int pre_sleep_hook */
 778
 779 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 780 {
 781         return (check_resize (ping));
 782 } /* }}} int pre_sleep_hook */
 783 #else /* if !USE_NCURSES */
 784 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 785 {
 786         pingobj_iter_t *iter;
 787
 788         for (iter = ping_iterator_get (ping);
 789                         iter != NULL;
 790                         iter = ping_iterator_next (iter))
 791         {
 792                 ping_context_t *ctx;
 793                 size_t buffer_size;
 794
 795                 ctx = ping_iterator_get_context (iter);
 796                 if (ctx == NULL)
 797                         continue;
 798
 799                 buffer_size = 0;
 800                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 801
 802                 printf ("PING %s (%s) %zu bytes of data.\n",
 803                                 ctx->host, ctx->addr, buffer_size);
 804         }
 805
 806         return (0);
 807 } /* }}} int pre_loop_hook */
 808
 809 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 810 {
 811         fflush (stdout);
 812
 813         return (0);
 814 } /* }}} int pre_sleep_hook */
 815
 816 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 817 {
 818         return (0);
 819 } /* }}} int post_sleep_hook */
 820 #endif
 821
 822 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 823                 __attribute__((unused)) int index)
 824 {
 825         double          latency;
 826         unsigned int    sequence;
 827         int             recv_ttl;
 828         uint8_t         recv_qos;
 829         char            recv_qos_str[16];
 830         size_t          buffer_len;
 831         size_t          data_len;
 832         ping_context_t *context;
 833
 834         latency = -1.0;
 835         buffer_len = sizeof (latency);
 836         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 837                         &latency, &buffer_len);
 838
 839         sequence = 0;
 840         buffer_len = sizeof (sequence);
 841         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 842                         &sequence, &buffer_len);
 843
 844         recv_ttl = -1;
 845         buffer_len = sizeof (recv_ttl);
 846         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 847                         &recv_ttl, &buffer_len);
 848
 849         recv_qos = 0;
 850         buffer_len = sizeof (recv_qos);
 851         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 852                         &recv_qos, &buffer_len);
 853
 854         data_len = 0;
 855         ping_iterator_get_info (iter, PING_INFO_DATA,
 856                         NULL, &data_len);
 857
 858         context = (ping_context_t *) ping_iterator_get_context (iter);
 859
 860 #if USE_NCURSES
 861 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 862 #else
 863 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 864 #endif
 865
 866         context->req_sent++;
 867         if (latency > 0.0)
 868         {
 869                 context->req_rcvd++;
 870                 context->latency_total += latency;
 871                 context->latency_total_square += (latency * latency);
 872
 873                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 874                         context->latency_max = latency;
 875                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 876                         context->latency_min = latency;
 877
 878 #if USE_NCURSES
 879                 if (has_colors () == TRUE)
 880                 {
 881                         int color = OPING_GREEN;
 882                         double average = context_get_average (context);
 883                         double stddev = context_get_stddev (context);
 884
 885                         if ((latency < (average - (2 * stddev)))
 886                                         || (latency > (average + (2 * stddev))))
 887                                 color = OPING_RED;
 888                         else if ((latency < (average - stddev))
 889                                         || (latency > (average + stddev)))
 890                                 color = OPING_YELLOW;
 891
 892                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 893                                         data_len, context->host, context->addr,
 894                                         sequence, recv_ttl,
 895                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 896                         if ((recv_qos != 0) || (opt_send_qos != 0))
 897                         {
 898                                 HOST_PRINTF ("qos=%s ",
 899                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 900                         }
 901                         HOST_PRINTF ("time=");
 902                         wattron (main_win, COLOR_PAIR(color));
 903                         HOST_PRINTF ("%.2f", latency);
 904                         wattroff (main_win, COLOR_PAIR(color));
 905                         HOST_PRINTF (" ms\n");
 906                 }
 907                 else
 908                 {
 909 #endif
 910                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 911                                 data_len,
 912                                 context->host, context->addr,
 913                                 sequence, recv_ttl);
 914                 if ((recv_qos != 0) || (opt_send_qos != 0))
 915                 {
 916                         HOST_PRINTF ("qos=%s ",
 917                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 918                 }
 919                 HOST_PRINTF ("time=%.2f ms\n", latency);
 920 #if USE_NCURSES
 921                 }
 922 #endif
 923         }
 924         else
 925         {
 926 #if USE_NCURSES
 927                 if (has_colors () == TRUE)
 928                 {
 929                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 930                                         context->host, context->addr,
 931                                         sequence);
 932                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 933                         HOST_PRINTF ("timeout");
 934                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 935                         HOST_PRINTF ("\n");
 936                 }
 937                 else
 938                 {
 939 #endif
 940                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 941                                 context->host, context->addr,
 942                                 sequence);
 943 #if USE_NCURSES
 944                 }
 945 #endif
 946         }
 947
 948 #if USE_NCURSES
 949         update_stats_from_context (context);
 950         wrefresh (main_win);
 951 #endif
 952 } /* }}} void update_host_hook */
 953
 954 /* returns the number of significant failures: sum over hosts of
 955    unreturned packets exceeding 50% of the number sent, rounding up. */
 956 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 957 {
 958         pingobj_iter_t *iter;
 959         /* failures to report: sum over hosts of number of failed
 960            returns above 50% */
 961         int failure_count = 0;
 962
 963 #if USE_NCURSES
 964         endwin ();
 965 #endif
 966
 967         for (iter = ping_iterator_get (ping);
 968                         iter != NULL;
 969                         iter = ping_iterator_next (iter))
 970         {
 971                 ping_context_t *context;
 972
 973                 context = ping_iterator_get_context (iter);
 974
 975                 printf ("\n--- %s ping statistics ---\n"
 976                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 977                                 context->host, context->req_sent, context->req_rcvd,
 978                                 context_get_packet_loss (context),
 979                                 context->latency_total);
 980
 981                 {
 982                   /* threshold for counting failed returns is 50%, rounding up */
 983                   int threshold = (context->req_sent + 1) / 2;
 984                   if (context->req_rcvd < threshold)
 985                     failure_count += threshold - context->req_rcvd;
 986                 }
 987
 988                 if (context->req_rcvd != 0)
 989                 {
 990                         double average;
 991                         double deviation;
 992
 993                         average = context_get_average (context);
 994                         deviation = context_get_stddev (context);
 995
 996                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 997                                         context->latency_min,
 998                                         average,
 999                                         context->latency_max,
1000                                         deviation);
1001                 }
1002
1003                 ping_iterator_set_context (iter, NULL);
1004                 context_destroy (context);
1005         }
1006
1007         return (failure_count);
1008 } /* }}} int post_loop_hook */
1009
1010 int main (int argc, char **argv) /* {{{ */
1011 {
1012         pingobj_t      *ping;
1013         pingobj_iter_t *iter;
1014
1015         struct sigaction sigint_action;
1016
1017         struct timeval  tv_begin;
1018         struct timeval  tv_end;
1019         struct timespec ts_wait;
1020         struct timespec ts_int;
1021
1022         int optind;
1023         int i;
1024         int status;
1025 #if _POSIX_SAVED_IDS
1026         uid_t saved_set_uid;
1027
1028         /* Save the old effective user id */
1029         saved_set_uid = geteuid ();
1030         /* Set the effective user ID to the real user ID without changing the
1031          * saved set-user ID */
1032         status = seteuid (getuid ());
1033         if (status != 0)
1034         {
1035                 fprintf (stderr, "Temporarily dropping privileges "
1036                                 "failed: %s\n", strerror (errno));
1037                 exit (EXIT_FAILURE);
1038         }
1039 #endif
1040
1041         optind = read_options (argc, argv);
1042
1043 #if !_POSIX_SAVED_IDS
1044         /* Cannot temporarily drop privileges -> reject every file but "-". */
1045         if ((opt_filename != NULL)
1046                         && (strcmp ("-", opt_filename) != 0)
1047                         && (getuid () != geteuid ()))
1048         {
1049                 fprintf (stderr, "Your real and effective user IDs don't "
1050                                 "match. Reading from a file (option '-f')\n"
1051                                 "is therefore too risky. You can still read "
1052                                 "from STDIN using '-f -' if you like.\n"
1053                                 "Sorry.\n");
1054                 exit (EXIT_FAILURE);
1055         }
1056 #endif
1057
1058         if ((optind >= argc) && (opt_filename == NULL)) {
1059                 usage_exit (argv[0], 1);
1060         }
1061
1062         if ((ping = ping_construct ()) == NULL)
1063         {
1064                 fprintf (stderr, "ping_construct failed\n");
1065                 return (1);
1066         }
1067
1068         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1069         {
1070                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1071                                 opt_send_ttl, ping_get_error (ping));
1072         }
1073
1074         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1075         {
1076                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1077                                 opt_send_qos, ping_get_error (ping));
1078         }
1079
1080         {
1081                 double temp_sec;
1082                 double temp_nsec;
1083
1084                 temp_nsec = modf (opt_interval, &temp_sec);
1085                 ts_int.tv_sec  = (time_t) temp_sec;
1086                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1087
1088                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1089         }
1090
1091         if (opt_addrfamily != PING_DEF_AF)
1092                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1093
1094         if (opt_srcaddr != NULL)
1095         {
1096                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1097                 {
1098                         fprintf (stderr, "Setting source address failed: %s\n",
1099                                         ping_get_error (ping));
1100                 }
1101         }
1102
1103         if (opt_device != NULL)
1104         {
1105                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1106                 {
1107                         fprintf (stderr, "Setting device failed: %s\n",
1108                                         ping_get_error (ping));
1109                 }
1110         }
1111
1112         if (opt_filename != NULL)
1113         {
1114                 FILE *infile;
1115                 char line[256];
1116                 char host[256];
1117
1118                 if (strcmp (opt_filename, "-") == 0)
1119                         /* Open STDIN */
1120                         infile = fdopen(0, "r");
1121                 else
1122                         infile = fopen(opt_filename, "r");
1123
1124                 if (infile == NULL)
1125                 {
1126                         fprintf (stderr, "Opening %s failed: %s\n",
1127                                         (strcmp (opt_filename, "-") == 0)
1128                                         ? "STDIN" : opt_filename,
1129                                         strerror(errno));
1130                         return (1);
1131                 }
1132
1133 #if _POSIX_SAVED_IDS
1134                 /* Regain privileges */
1135                 status = seteuid (saved_set_uid);
1136                 if (status != 0)
1137                 {
1138                         fprintf (stderr, "Temporarily re-gaining privileges "
1139                                         "failed: %s\n", strerror (errno));
1140                         exit (EXIT_FAILURE);
1141                 }
1142 #endif
1143
1144                 while (fgets(line, sizeof(line), infile))
1145                 {
1146                         /* Strip whitespace */
1147                         if (sscanf(line, "%s", host) != 1)
1148                                 continue;
1149
1150                         if ((host[0] == 0) || (host[0] == '#'))
1151                                 continue;
1152
1153                         if (ping_host_add(ping, host) < 0)
1154                         {
1155                                 const char *errmsg = ping_get_error (ping);
1156
1157                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1158                                 continue;
1159                         }
1160                         else
1161                         {
1162                                 host_num++;
1163                         }
1164                 }
1165
1166 #if _POSIX_SAVED_IDS
1167                 /* Drop privileges */
1168                 status = seteuid (getuid ());
1169                 if (status != 0)
1170                 {
1171                         fprintf (stderr, "Temporarily dropping privileges "
1172                                         "failed: %s\n", strerror (errno));
1173                         exit (EXIT_FAILURE);
1174                 }
1175 #endif
1176
1177                 fclose(infile);
1178         }
1179
1180 #if _POSIX_SAVED_IDS
1181         /* Regain privileges */
1182         status = seteuid (saved_set_uid);
1183         if (status != 0)
1184         {
1185                 fprintf (stderr, "Temporarily re-gaining privileges "
1186                                 "failed: %s\n", strerror (errno));
1187                 exit (EXIT_FAILURE);
1188         }
1189 #endif
1190
1191         for (i = optind; i < argc; i++)
1192         {
1193                 if (ping_host_add (ping, argv[i]) < 0)
1194                 {
1195                         const char *errmsg = ping_get_error (ping);
1196
1197                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1198                         continue;
1199                 }
1200                 else
1201                 {
1202                         host_num++;
1203                 }
1204         }
1205
1206         /* Permanently drop root privileges if we're setuid-root. */
1207         status = setuid (getuid ());
1208         if (status != 0)
1209         {
1210                 fprintf (stderr, "Dropping privileges failed: %s\n",
1211                                 strerror (errno));
1212                 exit (EXIT_FAILURE);
1213         }
1214
1215 #if _POSIX_SAVED_IDS
1216         saved_set_uid = (uid_t) -1;
1217 #endif
1218
1219         ping_initialize_contexts (ping);
1220
1221         if (i == 0)
1222                 return (1);
1223
1224         memset (&sigint_action, '\0', sizeof (sigint_action));
1225         sigint_action.sa_handler = sigint_handler;
1226         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1227         {
1228                 perror ("sigaction");
1229                 return (1);
1230         }
1231
1232         pre_loop_hook (ping);
1233
1234         while (opt_count != 0)
1235         {
1236                 int index;
1237                 int status;
1238
1239                 if (gettimeofday (&tv_begin, NULL) < 0)
1240                 {
1241                         perror ("gettimeofday");
1242                         return (1);
1243                 }
1244
1245                 if (ping_send (ping) < 0)
1246                 {
1247                         fprintf (stderr, "ping_send failed: %s\n",
1248                                         ping_get_error (ping));
1249                         return (1);
1250                 }
1251
1252                 index = 0;
1253                 for (iter = ping_iterator_get (ping);
1254                                 iter != NULL;
1255                                 iter = ping_iterator_next (iter))
1256                 {
1257                         update_host_hook (iter, index);
1258                         index++;
1259                 }
1260
1261                 pre_sleep_hook (ping);
1262
1263                 /* Don't sleep in the last iteration */
1264                 if (opt_count == 1)
1265                         break;
1266
1267                 if (gettimeofday (&tv_end, NULL) < 0)
1268                 {
1269                         perror ("gettimeofday");
1270                         return (1);
1271                 }
1272
1273                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1274
1275                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1276                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1277                 {
1278                         if (errno != EINTR)
1279                         {
1280                                 perror ("nanosleep");
1281                                 break;
1282                         }
1283                         else if (opt_count == 0)
1284                         {
1285                                 /* sigint */
1286                                 break;
1287                         }
1288                 }
1289
1290                 post_sleep_hook (ping);
1291
1292                 if (opt_count > 0)
1293                         opt_count--;
1294         } /* while (opt_count != 0) */
1295
1296         status = post_loop_hook (ping);
1297
1298         ping_destroy (ping);
1299
1300         if (status)
1301           return (EXIT_FAILURE + status);
1302         else
1303           return (EXIT_SUCCESS);
1304 } /* }}} int main */
1305
1306 /* vim: set fdm=marker : */