src/oping.c

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