src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 typedef struct ping_context
  93 {
  94         char host[NI_MAXHOST];
  95         char addr[NI_MAXHOST];
  96
  97         int index;
  98         int req_sent;
  99         int req_rcvd;
 100
 101         double latency_min;
 102         double latency_max;
 103         double latency_total;
 104         double latency_total_square;
 105
 106 #if USE_NCURSES
 107         WINDOW *window;
 108 #endif
 109 } ping_context_t;
 110
 111 static double  opt_interval   = 1.0;
 112 static int     opt_addrfamily = PING_DEF_AF;
 113 static char   *opt_srcaddr    = NULL;
 114 static char   *opt_device     = NULL;
 115 static char   *opt_filename   = NULL;
 116 static int     opt_count      = -1;
 117 static int     opt_send_ttl   = 64;
 118 static uint8_t opt_send_qos   = 0;
 119
 120 static int host_num = 0;
 121
 122 #if USE_NCURSES
 123 static WINDOW *main_win = NULL;
 124 #endif
 125
 126 static void sigint_handler (int signal) /* {{{ */
 127 {
 128         /* Make compiler happy */
 129         signal = 0;
 130         /* Exit the loop */
 131         opt_count = 0;
 132 } /* }}} void sigint_handler */
 133
 134 static ping_context_t *context_create (void) /* {{{ */
 135 {
 136         ping_context_t *ret;
 137
 138         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 139                 return (NULL);
 140
 141         memset (ret, '\0', sizeof (ping_context_t));
 142
 143         ret->latency_min   = -1.0;
 144         ret->latency_max   = -1.0;
 145         ret->latency_total = 0.0;
 146         ret->latency_total_square = 0.0;
 147
 148 #if USE_NCURSES
 149         ret->window = NULL;
 150 #endif
 151
 152         return (ret);
 153 } /* }}} ping_context_t *context_create */
 154
 155 static void context_destroy (ping_context_t *context) /* {{{ */
 156 {
 157         if (context == NULL)
 158                 return;
 159
 160 #if USE_NCURSES
 161         if (context->window != NULL)
 162         {
 163                 delwin (context->window);
 164                 context->window = NULL;
 165         }
 166 #endif
 167
 168         free (context);
 169 } /* }}} void context_destroy */
 170
 171 static double context_get_average (ping_context_t *ctx) /* {{{ */
 172 {
 173         double num_total;
 174
 175         if (ctx == NULL)
 176                 return (-1.0);
 177
 178         if (ctx->req_rcvd < 1)
 179                 return (-0.0);
 180
 181         num_total = (double) ctx->req_rcvd;
 182         return (ctx->latency_total / num_total);
 183 } /* }}} double context_get_average */
 184
 185 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 186 {
 187         double num_total;
 188
 189         if (ctx == NULL)
 190                 return (-1.0);
 191
 192         if (ctx->req_rcvd < 1)
 193                 return (-0.0);
 194         else if (ctx->req_rcvd < 2)
 195                 return (0.0);
 196
 197         num_total = (double) ctx->req_rcvd;
 198         return (sqrt (((num_total * ctx->latency_total_square)
 199                                         - (ctx->latency_total * ctx->latency_total))
 200                                 / (num_total * (num_total - 1.0))));
 201 } /* }}} double context_get_stddev */
 202
 203 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 204 {
 205         if (ctx == NULL)
 206                 return (-1.0);
 207
 208         if (ctx->req_sent < 1)
 209                 return (0.0);
 210
 211         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 212                         / ((double) ctx->req_sent));
 213 } /* }}} double context_get_packet_loss */
 214
 215 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 216 {
 217         pingobj_iter_t *iter;
 218         int index;
 219
 220         if (ping == NULL)
 221                 return (EINVAL);
 222
 223         index = 0;
 224         for (iter = ping_iterator_get (ping);
 225                         iter != NULL;
 226                         iter = ping_iterator_next (iter))
 227         {
 228                 ping_context_t *context;
 229                 size_t buffer_size;
 230
 231                 context = context_create ();
 232                 context->index = index;
 233
 234                 buffer_size = sizeof (context->host);
 235                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 236
 237                 buffer_size = sizeof (context->addr);
 238                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 239
 240                 ping_iterator_set_context (iter, (void *) context);
 241
 242                 index++;
 243         }
 244
 245         return (0);
 246 } /* }}} int ping_initialize_contexts */
 247
 248 static void usage_exit (const char *name, int status) /* {{{ */
 249 {
 250         fprintf (stderr, "Usage: %s [OPTIONS] "
 251                                 "-f filename | host [host [host ...]]\n"
 252
 253                         "\nAvailable options:\n"
 254                         "  -4|-6        force the use of IPv4 or IPv6\n"
 255                         "  -c count     number of ICMP packets to send\n"
 256                         "  -i interval  interval with which to send ICMP packets\n"
 257                         "  -t ttl       time to live for each ICMP packet\n"
 258                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 259                         "               Use \"-Q help\" for a list of valid options.\n"
 260                         "  -I srcaddr   source address\n"
 261                         "  -D device    outgoing interface name\n"
 262                         "  -f filename  filename to read hosts from\n"
 263
 264                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 265                         "by Florian octo Forster <octo@verplant.org>\n"
 266                         "for contributions see `AUTHORS'\n",
 267                         name);
 268         exit (status);
 269 } /* }}} void usage_exit */
 270
 271 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 272 {
 273         if (arg != 0)
 274                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 275
 276         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 277                         "\n"
 278                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 279                         "\n"
 280                         "    be                     Best Effort (BE, default PHB).\n"
 281                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 282                         "                           (low delay, low loss, low jitter)\n"
 283                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 284                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 285                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 286                         "                           For example: \"cs1\" (priority traffic)\n"
 287                         "\n"
 288                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 289                         "\n"
 290                         "    lowdelay     (%#04x)    minimize delay\n"
 291                         "    throughput   (%#04x)    maximize throughput\n"
 292                         "    reliability  (%#04x)    maximize reliability\n"
 293                         "    mincost      (%#04x)    minimize monetary cost\n"
 294                         "\n"
 295                         "  Specify manually\n"
 296                         "\n"
 297                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 298                         "       0 -  255            Decimal numeric specification.\n"
 299                         "\n",
 300                         (unsigned int) IPTOS_LOWDELAY,
 301                         (unsigned int) IPTOS_THROUGHPUT,
 302                         (unsigned int) IPTOS_RELIABILITY,
 303                         (unsigned int) IPTOS_MINCOST);
 304
 305         exit (status);
 306 } /* }}} void usage_qos_exit */
 307
 308 static int set_opt_send_qos (const char *opt) /* {{{ */
 309 {
 310         if (opt == NULL)
 311                 return (EINVAL);
 312
 313         if (strcasecmp ("help", opt) == 0)
 314                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 315         /* DiffServ (RFC 2474): */
 316         /* - Best effort (BE) */
 317         else if (strcasecmp ("be", opt) == 0)
 318                 opt_send_qos = 0;
 319         /* - Expedited Forwarding (EF, RFC 3246) */
 320         else if (strcasecmp ("ef", opt) == 0)
 321                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 322         /* - Assured Forwarding (AF, RFC 2597) */
 323         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 324                         && (strlen (opt) == 4))
 325         {
 326                 uint8_t dscp;
 327                 uint8_t class;
 328                 uint8_t prec;
 329
 330                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 331                 if (opt[2] == '1')
 332                         class = 1;
 333                 else if (opt[2] == '2')
 334                         class = 2;
 335                 else if (opt[2] == '3')
 336                         class = 3;
 337                 else if (opt[2] == '4')
 338                         class = 4;
 339                 else
 340                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 341
 342                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 343                 if (opt[3] == '1')
 344                         prec = 1;
 345                 else if (opt[3] == '2')
 346                         prec = 2;
 347                 else if (opt[3] == '3')
 348                         prec = 3;
 349                 else
 350                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 351
 352                 dscp = (8 * class) + (2 * prec);
 353                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 354                 opt_send_qos = dscp << 2;
 355         }
 356         /* - Class Selector (CS) */
 357         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 358                         && (strlen (opt) == 3))
 359         {
 360                 uint8_t class;
 361
 362                 if ((opt[2] < '0') || (opt[2] > '7'))
 363                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 364
 365                 /* Not exactly legal by the C standard, but I don't know of any
 366                  * system not supporting this hack. */
 367                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 368                 opt_send_qos = class << 5;
 369         }
 370         /* Type of Service (RFC 1349) */
 371         else if (strcasecmp ("lowdelay", opt) == 0)
 372                 opt_send_qos = IPTOS_LOWDELAY;
 373         else if (strcasecmp ("throughput", opt) == 0)
 374                 opt_send_qos = IPTOS_THROUGHPUT;
 375         else if (strcasecmp ("reliability", opt) == 0)
 376                 opt_send_qos = IPTOS_RELIABILITY;
 377         else if (strcasecmp ("mincost", opt) == 0)
 378                 opt_send_qos = IPTOS_MINCOST;
 379         /* Numeric value */
 380         else
 381         {
 382                 unsigned long value;
 383                 char *endptr;
 384
 385                 errno = 0;
 386                 endptr = NULL;
 387                 value = strtoul (opt, &endptr, /* base = */ 0);
 388                 if ((errno != 0) || (endptr == opt)
 389                                 || (endptr == NULL) || (*endptr != 0)
 390                                 || (value > 0xff))
 391                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 392
 393                 opt_send_qos = (uint8_t) value;
 394         }
 395
 396         return (0);
 397 } /* }}} int set_opt_send_qos */
 398
 399 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 400 {
 401         uint8_t dscp;
 402         uint8_t ecn;
 403         char *dscp_str;
 404         char *ecn_str;
 405
 406         dscp = qos >> 2;
 407         ecn = qos & 0x03;
 408
 409         switch (dscp)
 410         {
 411                 case 0x00: dscp_str = "be";  break;
 412                 case 0x2e: dscp_str = "ef";  break;
 413                 case 0x0a: dscp_str = "af11"; break;
 414                 case 0x0c: dscp_str = "af12"; break;
 415                 case 0x0e: dscp_str = "af13"; break;
 416                 case 0x12: dscp_str = "af21"; break;
 417                 case 0x14: dscp_str = "af22"; break;
 418                 case 0x16: dscp_str = "af23"; break;
 419                 case 0x1a: dscp_str = "af31"; break;
 420                 case 0x1c: dscp_str = "af32"; break;
 421                 case 0x1e: dscp_str = "af33"; break;
 422                 case 0x22: dscp_str = "af41"; break;
 423                 case 0x24: dscp_str = "af42"; break;
 424                 case 0x26: dscp_str = "af43"; break;
 425                 case 0x08: dscp_str = "cs1";  break;
 426                 case 0x10: dscp_str = "cs2";  break;
 427                 case 0x18: dscp_str = "cs3";  break;
 428                 case 0x20: dscp_str = "cs4";  break;
 429                 case 0x28: dscp_str = "cs5";  break;
 430                 case 0x30: dscp_str = "cs6";  break;
 431                 case 0x38: dscp_str = "cs7";  break;
 432                 default:   dscp_str = NULL;
 433         }
 434
 435         switch (ecn)
 436         {
 437                 case 0x01: ecn_str = ",ecn(1)"; break;
 438                 case 0x02: ecn_str = ",ecn(0)"; break;
 439                 case 0x03: ecn_str = ",ce"; break;
 440                 default:   ecn_str = "";
 441         }
 442
 443         if (dscp_str == NULL)
 444                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 445         else
 446                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 447         buffer[buffer_size - 1] = 0;
 448
 449         return (buffer);
 450 } /* }}} char *format_qos */
 451
 452 static int read_options (int argc, char **argv) /* {{{ */
 453 {
 454         int optchar;
 455
 456         while (1)
 457         {
 458                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 459
 460                 if (optchar == -1)
 461                         break;
 462
 463                 switch (optchar)
 464                 {
 465                         case '4':
 466                         case '6':
 467                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 468                                 break;
 469
 470                         case 'c':
 471                                 {
 472                                         int new_count;
 473                                         new_count = atoi (optarg);
 474                                         if (new_count > 0)
 475                                                 opt_count = new_count;
 476                                         else
 477                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 478                                                                 optarg);
 479                                 }
 480                                 break;
 481
 482                         case 'f':
 483                                 {
 484                                         if (opt_filename != NULL)
 485                                                 free (opt_filename);
 486                                         opt_filename = strdup (optarg);
 487                                 }
 488                                 break;
 489
 490                         case 'i':
 491                                 {
 492                                         double new_interval;
 493                                         new_interval = atof (optarg);
 494                                         if (new_interval < 0.001)
 495                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 496                                                                 optarg);
 497                                         else
 498                                                 opt_interval = new_interval;
 499                                 }
 500                                 break;
 501                         case 'I':
 502                                 {
 503                                         if (opt_srcaddr != NULL)
 504                                                 free (opt_srcaddr);
 505                                         opt_srcaddr = strdup (optarg);
 506                                 }
 507                                 break;
 508
 509                         case 'D':
 510                                 opt_device = optarg;
 511                                 break;
 512
 513                         case 't':
 514                         {
 515                                 int new_send_ttl;
 516                                 new_send_ttl = atoi (optarg);
 517                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 518                                         opt_send_ttl = new_send_ttl;
 519                                 else
 520                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 521                                                         optarg);
 522                                 break;
 523                         }
 524
 525                         case 'Q':
 526                                 set_opt_send_qos (optarg);
 527                                 break;
 528
 529                         case 'h':
 530                                 usage_exit (argv[0], 0);
 531                                 break;
 532                         default:
 533                                 usage_exit (argv[0], 1);
 534                 }
 535         }
 536
 537         return (optind);
 538 } /* }}} read_options */
 539
 540 static void time_normalize (struct timespec *ts) /* {{{ */
 541 {
 542         while (ts->tv_nsec < 0)
 543         {
 544                 if (ts->tv_sec == 0)
 545                 {
 546                         ts->tv_nsec = 0;
 547                         return;
 548                 }
 549
 550                 ts->tv_sec  -= 1;
 551                 ts->tv_nsec += 1000000000;
 552         }
 553
 554         while (ts->tv_nsec >= 1000000000)
 555         {
 556                 ts->tv_sec  += 1;
 557                 ts->tv_nsec -= 1000000000;
 558         }
 559 } /* }}} void time_normalize */
 560
 561 static void time_calc (struct timespec *ts_dest, /* {{{ */
 562                 const struct timespec *ts_int,
 563                 const struct timeval  *tv_begin,
 564                 const struct timeval  *tv_end)
 565 {
 566         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 567         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 568         time_normalize (ts_dest);
 569
 570         /* Assure that `(begin + interval) > end'.
 571          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 572          * which may be `unsigned. *sigh* */
 573         if ((tv_end->tv_sec > ts_dest->tv_sec)
 574                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 575                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 576         {
 577                 ts_dest->tv_sec  = 0;
 578                 ts_dest->tv_nsec = 0;
 579                 return;
 580         }
 581
 582         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 583         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 584         time_normalize (ts_dest);
 585 } /* }}} void time_calc */
 586
 587 #if USE_NCURSES
 588 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 589 {
 590         if ((ctx == NULL) || (ctx->window == NULL))
 591                 return (EINVAL);
 592
 593         werase (ctx->window);
 594
 595         box (ctx->window, 0, 0);
 596         wattron (ctx->window, A_BOLD);
 597         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 598                         " %s ", ctx->host);
 599         wattroff (ctx->window, A_BOLD);
 600         wprintw (ctx->window, "ping statistics ");
 601         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 602                         "%i packets transmitted, %i received, %.2f%% packet "
 603                         "loss, time %.1fms",
 604                         ctx->req_sent, ctx->req_rcvd,
 605                         context_get_packet_loss (ctx),
 606                         ctx->latency_total);
 607         if (ctx->req_rcvd != 0)
 608         {
 609                 double average;
 610                 double deviation;
 611
 612                 average = context_get_average (ctx);
 613                 deviation = context_get_stddev (ctx);
 614
 615                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 616                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 617                                 ctx->latency_min,
 618                                 average,
 619                                 ctx->latency_max,
 620                                 deviation);
 621         }
 622
 623         wrefresh (ctx->window);
 624
 625         return (0);
 626 } /* }}} int update_stats_from_context */
 627
 628 static int on_resize (pingobj_t *ping) /* {{{ */
 629 {
 630         pingobj_iter_t *iter;
 631         int width = 0;
 632         int height = 0;
 633         int main_win_height;
 634
 635         getmaxyx (stdscr, height, width);
 636         if ((height < 1) || (width < 1))
 637                 return (EINVAL);
 638
 639         main_win_height = height - (4 * host_num);
 640         wresize (main_win, main_win_height, /* width = */ width);
 641         /* Allow scrolling */
 642         scrollok (main_win, TRUE);
 643         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 644         /* Allow hardware accelerated scrolling. */
 645         idlok (main_win, TRUE);
 646         wrefresh (main_win);
 647
 648         for (iter = ping_iterator_get (ping);
 649                         iter != NULL;
 650                         iter = ping_iterator_next (iter))
 651         {
 652                 ping_context_t *context;
 653
 654                 context = ping_iterator_get_context (iter);
 655                 if (context == NULL)
 656                         continue;
 657
 658                 if (context->window != NULL)
 659                 {
 660                         delwin (context->window);
 661                         context->window = NULL;
 662                 }
 663                 context->window = newwin (/* height = */ 4,
 664                                 /* width = */ 0,
 665                                 /* y = */ main_win_height + (4 * context->index),
 666                                 /* x = */ 0);
 667         }
 668
 669         return (0);
 670 } /* }}} */
 671
 672 static int check_resize (pingobj_t *ping) /* {{{ */
 673 {
 674         int need_resize = 0;
 675
 676         while (42)
 677         {
 678                 int key = wgetch (stdscr);
 679                 if (key == ERR)
 680                         break;
 681                 else if (key == KEY_RESIZE)
 682                         need_resize = 1;
 683         }
 684
 685         if (need_resize)
 686                 return (on_resize (ping));
 687         else
 688                 return (0);
 689 } /* }}} int check_resize */
 690
 691 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 692 {
 693         pingobj_iter_t *iter;
 694         int width = 0;
 695         int height = 0;
 696         int main_win_height;
 697
 698         initscr ();
 699         cbreak ();
 700         noecho ();
 701         nodelay (stdscr, TRUE);
 702
 703         getmaxyx (stdscr, height, width);
 704         if ((height < 1) || (width < 1))
 705                 return (EINVAL);
 706
 707         if (has_colors () == TRUE)
 708         {
 709                 start_color ();
 710                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 711                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 712                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 713         }
 714
 715         main_win_height = height - (4 * host_num);
 716         main_win = newwin (/* height = */ main_win_height,
 717                         /* width = */ 0,
 718                         /* y = */ 0, /* x = */ 0);
 719         /* Allow scrolling */
 720         scrollok (main_win, TRUE);
 721         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 722         /* Allow hardware accelerated scrolling. */
 723         idlok (main_win, TRUE);
 724         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 725         wrefresh (main_win);
 726
 727         for (iter = ping_iterator_get (ping);
 728                         iter != NULL;
 729                         iter = ping_iterator_next (iter))
 730         {
 731                 ping_context_t *context;
 732
 733                 context = ping_iterator_get_context (iter);
 734                 if (context == NULL)
 735                         continue;
 736
 737                 if (context->window != NULL)
 738                 {
 739                         delwin (context->window);
 740                         context->window = NULL;
 741                 }
 742                 context->window = newwin (/* height = */ 4,
 743                                 /* width = */ 0,
 744                                 /* y = */ main_win_height + (4 * context->index),
 745                                 /* x = */ 0);
 746         }
 747
 748
 749         /* Don't know what good this does exactly, but without this code
 750          * "check_resize" will be called right after startup and *somehow*
 751          * this leads to display errors. If we purge all initial characters
 752          * here, the problem goes away. "wgetch" is non-blocking due to
 753          * "nodelay" (see above). */
 754         while (wgetch (stdscr) != ERR)
 755         {
 756                 /* eat up characters */;
 757         }
 758
 759         return (0);
 760 } /* }}} int pre_loop_hook */
 761
 762 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 763 {
 764         return (check_resize (ping));
 765 } /* }}} int pre_sleep_hook */
 766
 767 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 768 {
 769         return (check_resize (ping));
 770 } /* }}} int pre_sleep_hook */
 771 #else /* if !USE_NCURSES */
 772 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 773 {
 774         pingobj_iter_t *iter;
 775
 776         for (iter = ping_iterator_get (ping);
 777                         iter != NULL;
 778                         iter = ping_iterator_next (iter))
 779         {
 780                 ping_context_t *ctx;
 781                 size_t buffer_size;
 782
 783                 ctx = ping_iterator_get_context (iter);
 784                 if (ctx == NULL)
 785                         continue;
 786
 787                 buffer_size = 0;
 788                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 789
 790                 printf ("PING %s (%s) %zu bytes of data.\n",
 791                                 ctx->host, ctx->addr, buffer_size);
 792         }
 793
 794         return (0);
 795 } /* }}} int pre_loop_hook */
 796
 797 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 798 {
 799         fflush (stdout);
 800
 801         return (0);
 802 } /* }}} int pre_sleep_hook */
 803
 804 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 805 {
 806         return (0);
 807 } /* }}} int post_sleep_hook */
 808 #endif
 809
 810 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 811                 int index)
 812 {
 813         double          latency;
 814         unsigned int    sequence;
 815         int             recv_ttl;
 816         uint8_t         recv_qos;
 817         char            recv_qos_str[16];
 818         size_t          buffer_len;
 819         size_t          data_len;
 820         ping_context_t *context;
 821
 822         latency = -1.0;
 823         buffer_len = sizeof (latency);
 824         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 825                         &latency, &buffer_len);
 826
 827         sequence = 0;
 828         buffer_len = sizeof (sequence);
 829         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 830                         &sequence, &buffer_len);
 831
 832         recv_ttl = -1;
 833         buffer_len = sizeof (recv_ttl);
 834         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 835                         &recv_ttl, &buffer_len);
 836
 837         recv_qos = 0;
 838         buffer_len = sizeof (recv_qos);
 839         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 840                         &recv_qos, &buffer_len);
 841
 842         data_len = 0;
 843         ping_iterator_get_info (iter, PING_INFO_DATA,
 844                         NULL, &data_len);
 845
 846         context = (ping_context_t *) ping_iterator_get_context (iter);
 847
 848 #if USE_NCURSES
 849 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 850 #else
 851 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 852 #endif
 853
 854         context->req_sent++;
 855         if (latency > 0.0)
 856         {
 857                 context->req_rcvd++;
 858                 context->latency_total += latency;
 859                 context->latency_total_square += (latency * latency);
 860
 861                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 862                         context->latency_max = latency;
 863                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 864                         context->latency_min = latency;
 865
 866 #if USE_NCURSES
 867                 if (has_colors () == TRUE)
 868                 {
 869                         int color = OPING_GREEN;
 870                         double average = context_get_average (context);
 871                         double stddev = context_get_stddev (context);
 872
 873                         if ((latency < (average - (2 * stddev)))
 874                                         || (latency > (average + (2 * stddev))))
 875                                 color = OPING_RED;
 876                         else if ((latency < (average - stddev))
 877                                         || (latency > (average + stddev)))
 878                                 color = OPING_YELLOW;
 879
 880                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 881                                         data_len, context->host, context->addr,
 882                                         sequence, recv_ttl,
 883                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 884                         if ((recv_qos != 0) || (opt_send_qos != 0))
 885                         {
 886                                 HOST_PRINTF ("qos=%s ",
 887                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 888                         }
 889                         HOST_PRINTF ("time=");
 890                         wattron (main_win, COLOR_PAIR(color));
 891                         HOST_PRINTF ("%.2f", latency);
 892                         wattroff (main_win, COLOR_PAIR(color));
 893                         HOST_PRINTF (" ms\n");
 894                 }
 895                 else
 896                 {
 897 #endif
 898                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 899                                 data_len,
 900                                 context->host, context->addr,
 901                                 sequence, recv_ttl);
 902                 if ((recv_qos != 0) || (opt_send_qos != 0))
 903                 {
 904                         HOST_PRINTF ("qos=%s ",
 905                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 906                 }
 907                 HOST_PRINTF ("time=%.2f ms\n", latency);
 908 #if USE_NCURSES
 909                 }
 910 #endif
 911         }
 912         else
 913         {
 914 #if USE_NCURSES
 915                 if (has_colors () == TRUE)
 916                 {
 917                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 918                                         context->host, context->addr,
 919                                         sequence);
 920                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 921                         HOST_PRINTF ("timeout");
 922                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 923                         HOST_PRINTF ("\n");
 924                 }
 925                 else
 926                 {
 927 #endif
 928                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 929                                 context->host, context->addr,
 930                                 sequence);
 931 #if USE_NCURSES
 932                 }
 933 #endif
 934         }
 935
 936 #if USE_NCURSES
 937         update_stats_from_context (context);
 938         wrefresh (main_win);
 939 #endif
 940 } /* }}} void update_host_hook */
 941
 942 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 943 {
 944         pingobj_iter_t *iter;
 945
 946 #if USE_NCURSES
 947         endwin ();
 948 #endif
 949
 950         for (iter = ping_iterator_get (ping);
 951                         iter != NULL;
 952                         iter = ping_iterator_next (iter))
 953         {
 954                 ping_context_t *context;
 955
 956                 context = ping_iterator_get_context (iter);
 957
 958                 printf ("\n--- %s ping statistics ---\n"
 959                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 960                                 context->host, context->req_sent, context->req_rcvd,
 961                                 context_get_packet_loss (context),
 962                                 context->latency_total);
 963
 964                 if (context->req_rcvd != 0)
 965                 {
 966                         double average;
 967                         double deviation;
 968
 969                         average = context_get_average (context);
 970                         deviation = context_get_stddev (context);
 971
 972                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 973                                         context->latency_min,
 974                                         average,
 975                                         context->latency_max,
 976                                         deviation);
 977                 }
 978
 979                 ping_iterator_set_context (iter, NULL);
 980                 context_destroy (context);
 981         }
 982
 983         return (0);
 984 } /* }}} int post_loop_hook */
 985
 986 int main (int argc, char **argv) /* {{{ */
 987 {
 988         pingobj_t      *ping;
 989         pingobj_iter_t *iter;
 990
 991         struct sigaction sigint_action;
 992
 993         struct timeval  tv_begin;
 994         struct timeval  tv_end;
 995         struct timespec ts_wait;
 996         struct timespec ts_int;
 997
 998         int optind;
 999         int i;
1000         int status;
1001 #if _POSIX_SAVED_IDS
1002         uid_t saved_set_uid;
1003
1004         /* Save the old effective user id */
1005         saved_set_uid = geteuid ();
1006         /* Set the effective user ID to the real user ID without changing the
1007          * saved set-user ID */
1008         status = seteuid (getuid ());
1009         if (status != 0)
1010         {
1011                 fprintf (stderr, "Temporarily dropping privileges "
1012                                 "failed: %s\n", strerror (errno));
1013                 exit (EXIT_FAILURE);
1014         }
1015 #endif
1016
1017         optind = read_options (argc, argv);
1018
1019 #if !_POSIX_SAVED_IDS
1020         /* Cannot temporarily drop privileges -> reject every file but "-". */
1021         if ((opt_filename != NULL)
1022                         && (strcmp ("-", opt_filename) != 0)
1023                         && (getuid () != geteuid ()))
1024         {
1025                 fprintf (stderr, "Your real and effective user IDs don't "
1026                                 "match. Reading from a file (option '-f')\n"
1027                                 "is therefore too risky. You can still read "
1028                                 "from STDIN using '-f -' if you like.\n"
1029                                 "Sorry.\n");
1030                 exit (EXIT_FAILURE);
1031         }
1032 #endif
1033
1034         if ((optind >= argc) && (opt_filename == NULL)) {
1035                 usage_exit (argv[0], 1);
1036         }
1037
1038         if ((ping = ping_construct ()) == NULL)
1039         {
1040                 fprintf (stderr, "ping_construct failed\n");
1041                 return (1);
1042         }
1043
1044         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1045         {
1046                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1047                                 opt_send_ttl, ping_get_error (ping));
1048         }
1049
1050         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1051         {
1052                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1053                                 opt_send_qos, ping_get_error (ping));
1054         }
1055
1056         {
1057                 double temp_sec;
1058                 double temp_nsec;
1059
1060                 temp_nsec = modf (opt_interval, &temp_sec);
1061                 ts_int.tv_sec  = (time_t) temp_sec;
1062                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1063
1064                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1065         }
1066
1067         if (opt_addrfamily != PING_DEF_AF)
1068                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1069
1070         if (opt_srcaddr != NULL)
1071         {
1072                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1073                 {
1074                         fprintf (stderr, "Setting source address failed: %s\n",
1075                                         ping_get_error (ping));
1076                 }
1077         }
1078
1079         if (opt_device != NULL)
1080         {
1081                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1082                 {
1083                         fprintf (stderr, "Setting device failed: %s\n",
1084                                         ping_get_error (ping));
1085                 }
1086         }
1087
1088         if (opt_filename != NULL)
1089         {
1090                 FILE *infile;
1091                 char line[256];
1092                 char host[256];
1093
1094                 if (strcmp (opt_filename, "-") == 0)
1095                         /* Open STDIN */
1096                         infile = fdopen(0, "r");
1097                 else
1098                         infile = fopen(opt_filename, "r");
1099
1100                 if (infile == NULL)
1101                 {
1102                         fprintf (stderr, "Opening %s failed: %s\n",
1103                                         (strcmp (opt_filename, "-") == 0)
1104                                         ? "STDIN" : opt_filename,
1105                                         strerror(errno));
1106                         return (1);
1107                 }
1108
1109 #if _POSIX_SAVED_IDS
1110                 /* Regain privileges */
1111                 status = seteuid (saved_set_uid);
1112                 if (status != 0)
1113                 {
1114                         fprintf (stderr, "Temporarily re-gaining privileges "
1115                                         "failed: %s\n", strerror (errno));
1116                         exit (EXIT_FAILURE);
1117                 }
1118 #endif
1119
1120                 while (fgets(line, sizeof(line), infile))
1121                 {
1122                         /* Strip whitespace */
1123                         if (sscanf(line, "%s", host) != 1)
1124                                 continue;
1125
1126                         if ((host[0] == 0) || (host[0] == '#'))
1127                                 continue;
1128
1129                         if (ping_host_add(ping, host) < 0)
1130                         {
1131                                 const char *errmsg = ping_get_error (ping);
1132
1133                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1134                                 continue;
1135                         }
1136                         else
1137                         {
1138                                 host_num++;
1139                         }
1140                 }
1141
1142 #if _POSIX_SAVED_IDS
1143                 /* Drop privileges */
1144                 status = seteuid (getuid ());
1145                 if (status != 0)
1146                 {
1147                         fprintf (stderr, "Temporarily dropping privileges "
1148                                         "failed: %s\n", strerror (errno));
1149                         exit (EXIT_FAILURE);
1150                 }
1151 #endif
1152
1153                 fclose(infile);
1154         }
1155
1156 #if _POSIX_SAVED_IDS
1157         /* Regain privileges */
1158         status = seteuid (saved_set_uid);
1159         if (status != 0)
1160         {
1161                 fprintf (stderr, "Temporarily re-gaining privileges "
1162                                 "failed: %s\n", strerror (errno));
1163                 exit (EXIT_FAILURE);
1164         }
1165 #endif
1166
1167         for (i = optind; i < argc; i++)
1168         {
1169                 if (ping_host_add (ping, argv[i]) < 0)
1170                 {
1171                         const char *errmsg = ping_get_error (ping);
1172
1173                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1174                         continue;
1175                 }
1176                 else
1177                 {
1178                         host_num++;
1179                 }
1180         }
1181
1182         /* Permanently drop root privileges if we're setuid-root. */
1183         status = setuid (getuid ());
1184         if (status != 0)
1185         {
1186                 fprintf (stderr, "Dropping privileges failed: %s\n",
1187                                 strerror (errno));
1188                 exit (EXIT_FAILURE);
1189         }
1190
1191 #if _POSIX_SAVED_IDS
1192         saved_set_uid = (uid_t) -1;
1193 #endif
1194
1195         ping_initialize_contexts (ping);
1196
1197         if (i == 0)
1198                 return (1);
1199
1200         memset (&sigint_action, '\0', sizeof (sigint_action));
1201         sigint_action.sa_handler = sigint_handler;
1202         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1203         {
1204                 perror ("sigaction");
1205                 return (1);
1206         }
1207
1208         pre_loop_hook (ping);
1209
1210         while (opt_count != 0)
1211         {
1212                 int index;
1213                 int status;
1214
1215                 if (gettimeofday (&tv_begin, NULL) < 0)
1216                 {
1217                         perror ("gettimeofday");
1218                         return (1);
1219                 }
1220
1221                 if (ping_send (ping) < 0)
1222                 {
1223                         fprintf (stderr, "ping_send failed: %s\n",
1224                                         ping_get_error (ping));
1225                         return (1);
1226                 }
1227
1228                 index = 0;
1229                 for (iter = ping_iterator_get (ping);
1230                                 iter != NULL;
1231                                 iter = ping_iterator_next (iter))
1232                 {
1233                         update_host_hook (iter, index);
1234                         index++;
1235                 }
1236
1237                 pre_sleep_hook (ping);
1238
1239                 /* Don't sleep in the last iteration */
1240                 if (opt_count == 1)
1241                         break;
1242
1243                 if (gettimeofday (&tv_end, NULL) < 0)
1244                 {
1245                         perror ("gettimeofday");
1246                         return (1);
1247                 }
1248
1249                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1250
1251                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1252                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1253                 {
1254                         if (errno != EINTR)
1255                         {
1256                                 perror ("nanosleep");
1257                                 break;
1258                         }
1259                         else if (opt_count == 0)
1260                         {
1261                                 /* sigint */
1262                                 break;
1263                         }
1264                 }
1265
1266                 post_sleep_hook (ping);
1267
1268                 if (opt_count > 0)
1269                         opt_count--;
1270         } /* while (opt_count != 0) */
1271
1272         post_loop_hook (ping);
1273
1274         ping_destroy (ping);
1275
1276         return (0);
1277 } /* }}} int main */
1278
1279 /* vim: set fdm=marker : */