src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #include <locale.h>
  78
  79 #if USE_NCURSES
  80 # define NCURSES_OPAQUE 1
  81 /* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */
  82 # define _X_OPEN_SOURCE_EXTENDED
  83 # include <ncursesw/ncurses.h>
  84
  85 # define OPING_GREEN 1
  86 # define OPING_YELLOW 2
  87 # define OPING_RED 3
  88 # define OPING_GREEN_HIST 4
  89 # define OPING_YELLOW_HIST 5
  90 # define OPING_RED_HIST 6
  91 #endif
  92
  93 #include "oping.h"
  94
  95 const char *bars[BARS_LEN] = { "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
  96
  97 #ifndef _POSIX_SAVED_IDS
  98 # define _POSIX_SAVED_IDS 0
  99 #endif
 100
 101 /* Remove GNU specific __attribute__ settings when using another compiler */
 102 #if !__GNUC__
 103 # define __attribute__(x) /**/
 104 #endif
 105
 106 typedef struct ping_context
 107 {
 108         char host[NI_MAXHOST];
 109         char addr[NI_MAXHOST];
 110
 111         int index;
 112         int req_sent;
 113         int req_rcvd;
 114
 115         double latency_min;
 116         double latency_max;
 117         double latency_total;
 118         double latency_total_square;
 119
 120 #if USE_NCURSES
 121         WINDOW *window;
 122 #endif
 123 } ping_context_t;
 124
 125 static double  opt_interval   = 1.0;
 126 static int     opt_addrfamily = PING_DEF_AF;
 127 static char   *opt_srcaddr    = NULL;
 128 static char   *opt_device     = NULL;
 129 static char   *opt_filename   = NULL;
 130 static int     opt_count      = -1;
 131 static int     opt_send_ttl   = 64;
 132 static uint8_t opt_send_qos   = 0;
 133
 134 static int host_num = 0;
 135
 136 #if USE_NCURSES
 137 static WINDOW *main_win = NULL;
 138 #endif
 139
 140 static void sigint_handler (int signal) /* {{{ */
 141 {
 142         /* Make compiler happy */
 143         signal = 0;
 144         /* Exit the loop */
 145         opt_count = 0;
 146 } /* }}} void sigint_handler */
 147
 148 static ping_context_t *context_create (void) /* {{{ */
 149 {
 150         ping_context_t *ret;
 151
 152         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 153                 return (NULL);
 154
 155         memset (ret, '\0', sizeof (ping_context_t));
 156
 157         ret->latency_min   = -1.0;
 158         ret->latency_max   = -1.0;
 159         ret->latency_total = 0.0;
 160         ret->latency_total_square = 0.0;
 161
 162 #if USE_NCURSES
 163         ret->window = NULL;
 164 #endif
 165
 166         return (ret);
 167 } /* }}} ping_context_t *context_create */
 168
 169 static void context_destroy (ping_context_t *context) /* {{{ */
 170 {
 171         if (context == NULL)
 172                 return;
 173
 174 #if USE_NCURSES
 175         if (context->window != NULL)
 176         {
 177                 delwin (context->window);
 178                 context->window = NULL;
 179         }
 180 #endif
 181
 182         free (context);
 183 } /* }}} void context_destroy */
 184
 185 static double context_get_average (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
 195         num_total = (double) ctx->req_rcvd;
 196         return (ctx->latency_total / num_total);
 197 } /* }}} double context_get_average */
 198
 199 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 200 {
 201         double num_total;
 202
 203         if (ctx == NULL)
 204                 return (-1.0);
 205
 206         if (ctx->req_rcvd < 1)
 207                 return (-0.0);
 208         else if (ctx->req_rcvd < 2)
 209                 return (0.0);
 210
 211         num_total = (double) ctx->req_rcvd;
 212         return (sqrt (((num_total * ctx->latency_total_square)
 213                                         - (ctx->latency_total * ctx->latency_total))
 214                                 / (num_total * (num_total - 1.0))));
 215 } /* }}} double context_get_stddev */
 216
 217 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 218 {
 219         if (ctx == NULL)
 220                 return (-1.0);
 221
 222         if (ctx->req_sent < 1)
 223                 return (0.0);
 224
 225         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 226                         / ((double) ctx->req_sent));
 227 } /* }}} double context_get_packet_loss */
 228
 229 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 230 {
 231         pingobj_iter_t *iter;
 232         int index;
 233
 234         if (ping == NULL)
 235                 return (EINVAL);
 236
 237         index = 0;
 238         for (iter = ping_iterator_get (ping);
 239                         iter != NULL;
 240                         iter = ping_iterator_next (iter))
 241         {
 242                 ping_context_t *context;
 243                 size_t buffer_size;
 244
 245                 context = context_create ();
 246                 context->index = index;
 247
 248                 buffer_size = sizeof (context->host);
 249                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 250
 251                 buffer_size = sizeof (context->addr);
 252                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 253
 254                 ping_iterator_set_context (iter, (void *) context);
 255
 256                 index++;
 257         }
 258
 259         return (0);
 260 } /* }}} int ping_initialize_contexts */
 261
 262 static void usage_exit (const char *name, int status) /* {{{ */
 263 {
 264         fprintf (stderr, "Usage: %s [OPTIONS] "
 265                                 "-f filename | host [host [host ...]]\n"
 266
 267                         "\nAvailable options:\n"
 268                         "  -4|-6        force the use of IPv4 or IPv6\n"
 269                         "  -c count     number of ICMP packets to send\n"
 270                         "  -i interval  interval with which to send ICMP packets\n"
 271                         "  -t ttl       time to live for each ICMP packet\n"
 272                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 273                         "               Use \"-Q help\" for a list of valid options.\n"
 274                         "  -I srcaddr   source address\n"
 275                         "  -D device    outgoing interface name\n"
 276                         "  -f filename  filename to read hosts from\n"
 277
 278                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 279                         "by Florian octo Forster <octo@verplant.org>\n"
 280                         "for contributions see `AUTHORS'\n",
 281                         name);
 282         exit (status);
 283 } /* }}} void usage_exit */
 284
 285 __attribute__((noreturn))
 286 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 287 {
 288         if (arg != 0)
 289                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 290
 291         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 292                         "\n"
 293                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 294                         "\n"
 295                         "    be                     Best Effort (BE, default PHB).\n"
 296                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 297                         "                           (low delay, low loss, low jitter)\n"
 298                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 299                         "                           (capacity-admitted traffic)\n"
 300                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 301                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 302                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 303                         "                           For example: \"cs1\" (priority traffic)\n"
 304                         "\n"
 305                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 306                         "\n"
 307                         "    lowdelay     (%#04x)    minimize delay\n"
 308                         "    throughput   (%#04x)    maximize throughput\n"
 309                         "    reliability  (%#04x)    maximize reliability\n"
 310                         "    mincost      (%#04x)    minimize monetary cost\n"
 311                         "\n"
 312                         "  Specify manually\n"
 313                         "\n"
 314                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 315                         "       0 -  255            Decimal numeric specification.\n"
 316                         "\n",
 317                         (unsigned int) IPTOS_LOWDELAY,
 318                         (unsigned int) IPTOS_THROUGHPUT,
 319                         (unsigned int) IPTOS_RELIABILITY,
 320                         (unsigned int) IPTOS_MINCOST);
 321
 322         exit (status);
 323 } /* }}} void usage_qos_exit */
 324
 325 static int set_opt_send_qos (const char *opt) /* {{{ */
 326 {
 327         if (opt == NULL)
 328                 return (EINVAL);
 329
 330         if (strcasecmp ("help", opt) == 0)
 331                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 332         /* DiffServ (RFC 2474): */
 333         /* - Best effort (BE) */
 334         else if (strcasecmp ("be", opt) == 0)
 335                 opt_send_qos = 0;
 336         /* - Expedited Forwarding (EF, RFC 3246) */
 337         else if (strcasecmp ("ef", opt) == 0)
 338                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 339         /* - Voice Admit (VA, RFC 5865) */
 340         else if (strcasecmp ("va", opt) == 0)
 341                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 342         /* - Assured Forwarding (AF, RFC 2597) */
 343         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 344                         && (strlen (opt) == 4))
 345         {
 346                 uint8_t dscp;
 347                 uint8_t class = 0;
 348                 uint8_t prec = 0;
 349
 350                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 351                 if (opt[2] == '1')
 352                         class = 1;
 353                 else if (opt[2] == '2')
 354                         class = 2;
 355                 else if (opt[2] == '3')
 356                         class = 3;
 357                 else if (opt[2] == '4')
 358                         class = 4;
 359                 else
 360                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 361
 362                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 363                 if (opt[3] == '1')
 364                         prec = 1;
 365                 else if (opt[3] == '2')
 366                         prec = 2;
 367                 else if (opt[3] == '3')
 368                         prec = 3;
 369                 else
 370                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 371
 372                 dscp = (8 * class) + (2 * prec);
 373                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 374                 opt_send_qos = dscp << 2;
 375         }
 376         /* - Class Selector (CS) */
 377         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 378                         && (strlen (opt) == 3))
 379         {
 380                 uint8_t class;
 381
 382                 if ((opt[2] < '0') || (opt[2] > '7'))
 383                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 384
 385                 /* Not exactly legal by the C standard, but I don't know of any
 386                  * system not supporting this hack. */
 387                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 388                 opt_send_qos = class << 5;
 389         }
 390         /* Type of Service (RFC 1349) */
 391         else if (strcasecmp ("lowdelay", opt) == 0)
 392                 opt_send_qos = IPTOS_LOWDELAY;
 393         else if (strcasecmp ("throughput", opt) == 0)
 394                 opt_send_qos = IPTOS_THROUGHPUT;
 395         else if (strcasecmp ("reliability", opt) == 0)
 396                 opt_send_qos = IPTOS_RELIABILITY;
 397         else if (strcasecmp ("mincost", opt) == 0)
 398                 opt_send_qos = IPTOS_MINCOST;
 399         /* Numeric value */
 400         else
 401         {
 402                 unsigned long value;
 403                 char *endptr;
 404
 405                 errno = 0;
 406                 endptr = NULL;
 407                 value = strtoul (opt, &endptr, /* base = */ 0);
 408                 if ((errno != 0) || (endptr == opt)
 409                                 || (endptr == NULL) || (*endptr != 0)
 410                                 || (value > 0xff))
 411                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 412
 413                 opt_send_qos = (uint8_t) value;
 414         }
 415
 416         return (0);
 417 } /* }}} int set_opt_send_qos */
 418
 419 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 420 {
 421         uint8_t dscp;
 422         uint8_t ecn;
 423         char *dscp_str;
 424         char *ecn_str;
 425
 426         dscp = qos >> 2;
 427         ecn = qos & 0x03;
 428
 429         switch (dscp)
 430         {
 431                 case 0x00: dscp_str = "be";  break;
 432                 case 0x2e: dscp_str = "ef";  break;
 433                 case 0x2d: dscp_str = "va";  break;
 434                 case 0x0a: dscp_str = "af11"; break;
 435                 case 0x0c: dscp_str = "af12"; break;
 436                 case 0x0e: dscp_str = "af13"; break;
 437                 case 0x12: dscp_str = "af21"; break;
 438                 case 0x14: dscp_str = "af22"; break;
 439                 case 0x16: dscp_str = "af23"; break;
 440                 case 0x1a: dscp_str = "af31"; break;
 441                 case 0x1c: dscp_str = "af32"; break;
 442                 case 0x1e: dscp_str = "af33"; break;
 443                 case 0x22: dscp_str = "af41"; break;
 444                 case 0x24: dscp_str = "af42"; break;
 445                 case 0x26: dscp_str = "af43"; break;
 446                 case 0x08: dscp_str = "cs1";  break;
 447                 case 0x10: dscp_str = "cs2";  break;
 448                 case 0x18: dscp_str = "cs3";  break;
 449                 case 0x20: dscp_str = "cs4";  break;
 450                 case 0x28: dscp_str = "cs5";  break;
 451                 case 0x30: dscp_str = "cs6";  break;
 452                 case 0x38: dscp_str = "cs7";  break;
 453                 default:   dscp_str = NULL;
 454         }
 455
 456         switch (ecn)
 457         {
 458                 case 0x01: ecn_str = ",ecn(1)"; break;
 459                 case 0x02: ecn_str = ",ecn(0)"; break;
 460                 case 0x03: ecn_str = ",ce"; break;
 461                 default:   ecn_str = "";
 462         }
 463
 464         if (dscp_str == NULL)
 465                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 466         else
 467                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 468         buffer[buffer_size - 1] = 0;
 469
 470         return (buffer);
 471 } /* }}} char *format_qos */
 472
 473 static int read_options (int argc, char **argv) /* {{{ */
 474 {
 475         int optchar;
 476
 477         while (1)
 478         {
 479                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 480
 481                 if (optchar == -1)
 482                         break;
 483
 484                 switch (optchar)
 485                 {
 486                         case '4':
 487                         case '6':
 488                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 489                                 break;
 490
 491                         case 'c':
 492                                 {
 493                                         int new_count;
 494                                         new_count = atoi (optarg);
 495                                         if (new_count > 0)
 496                                                 opt_count = new_count;
 497                                         else
 498                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 499                                                                 optarg);
 500                                 }
 501                                 break;
 502
 503                         case 'f':
 504                                 {
 505                                         if (opt_filename != NULL)
 506                                                 free (opt_filename);
 507                                         opt_filename = strdup (optarg);
 508                                 }
 509                                 break;
 510
 511                         case 'i':
 512                                 {
 513                                         double new_interval;
 514                                         new_interval = atof (optarg);
 515                                         if (new_interval < 0.001)
 516                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 517                                                                 optarg);
 518                                         else
 519                                                 opt_interval = new_interval;
 520                                 }
 521                                 break;
 522                         case 'I':
 523                                 {
 524                                         if (opt_srcaddr != NULL)
 525                                                 free (opt_srcaddr);
 526                                         opt_srcaddr = strdup (optarg);
 527                                 }
 528                                 break;
 529
 530                         case 'D':
 531                                 opt_device = optarg;
 532                                 break;
 533
 534                         case 't':
 535                         {
 536                                 int new_send_ttl;
 537                                 new_send_ttl = atoi (optarg);
 538                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 539                                         opt_send_ttl = new_send_ttl;
 540                                 else
 541                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 542                                                         optarg);
 543                                 break;
 544                         }
 545
 546                         case 'Q':
 547                                 set_opt_send_qos (optarg);
 548                                 break;
 549
 550                         case 'h':
 551                                 usage_exit (argv[0], 0);
 552                                 break;
 553                         default:
 554                                 usage_exit (argv[0], 1);
 555                 }
 556         }
 557
 558         return (optind);
 559 } /* }}} read_options */
 560
 561 static void time_normalize (struct timespec *ts) /* {{{ */
 562 {
 563         while (ts->tv_nsec < 0)
 564         {
 565                 if (ts->tv_sec == 0)
 566                 {
 567                         ts->tv_nsec = 0;
 568                         return;
 569                 }
 570
 571                 ts->tv_sec  -= 1;
 572                 ts->tv_nsec += 1000000000;
 573         }
 574
 575         while (ts->tv_nsec >= 1000000000)
 576         {
 577                 ts->tv_sec  += 1;
 578                 ts->tv_nsec -= 1000000000;
 579         }
 580 } /* }}} void time_normalize */
 581
 582 static void time_calc (struct timespec *ts_dest, /* {{{ */
 583                 const struct timespec *ts_int,
 584                 const struct timeval  *tv_begin,
 585                 const struct timeval  *tv_end)
 586 {
 587         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 588         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 589         time_normalize (ts_dest);
 590
 591         /* Assure that `(begin + interval) > end'.
 592          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 593          * which may be `unsigned. *sigh* */
 594         if ((tv_end->tv_sec > ts_dest->tv_sec)
 595                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 596                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 597         {
 598                 ts_dest->tv_sec  = 0;
 599                 ts_dest->tv_nsec = 0;
 600                 return;
 601         }
 602
 603         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 604         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 605         time_normalize (ts_dest);
 606 } /* }}} void time_calc */
 607
 608 #if USE_NCURSES
 609 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 610 {
 611         double latency = -1.0;
 612         size_t buffer_len = sizeof (latency);
 613         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 614                         &latency, &buffer_len);
 615
 616         unsigned int sequence = 0;
 617         buffer_len = sizeof (sequence);
 618         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 619                         &sequence, &buffer_len);
 620
 621
 622         if ((ctx == NULL) || (ctx->window == NULL))
 623                 return (EINVAL);
 624
 625         /* werase (ctx->window); */
 626
 627         box (ctx->window, 0, 0);
 628         wattron (ctx->window, A_BOLD);
 629         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 630                         " %s ", ctx->host);
 631         wattroff (ctx->window, A_BOLD);
 632         wprintw (ctx->window, "ping statistics ");
 633         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 634                         "%i packets transmitted, %i received, %.2f%% packet "
 635                         "loss, time %.1fms",
 636                         ctx->req_sent, ctx->req_rcvd,
 637                         context_get_packet_loss (ctx),
 638                         ctx->latency_total);
 639         if (ctx->req_rcvd != 0)
 640         {
 641                 double average;
 642                 double deviation;
 643
 644                 average = context_get_average (ctx);
 645                 deviation = context_get_stddev (ctx);
 646
 647                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 648                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 649                                 ctx->latency_min,
 650                                 average,
 651                                 ctx->latency_max,
 652                                 deviation);
 653         }
 654
 655         if (latency > 0.0)
 656         {
 657                 if (has_colors () == TRUE)
 658                 {
 659                         int color = OPING_GREEN_HIST;
 660                         float ratio = 0;
 661                         int index = 0;
 662
 663                         ratio = latency / PING_DEF_TTL;
 664                         if (ratio > 2/3.0) {
 665                           color = OPING_RED_HIST;
 666                         }
 667                         else if (ratio > 1/3.0) {
 668                           color = OPING_YELLOW_HIST;
 669                         }
 670                         index = (int) (ratio * BARS_LEN * 3); /* 3 colors */
 671                         /* HOST_PRINTF ("%%r%f-ia%d-", ratio, index); */
 672                         index = index % (BARS_LEN-1);
 673                         /* HOST_PRINTF ("im%d-", index); */
 674                         if (index < 0 || index >= BARS_LEN) {
 675                           index = 0; /* safety check */
 676                         }
 677                         wattron (ctx->window, COLOR_PAIR(color));
 678                         mvwprintw (ctx->window,
 679                                    /* y = */ 3, /* x = */ 1 + sequence,
 680                                    bars[index]);
 681                         wattroff (ctx->window, COLOR_PAIR(color));
 682                 }
 683                 else
 684                 {
 685                 }
 686         }
 687         else {
 688                 wattron (ctx->window, COLOR_PAIR(OPING_RED) | A_BOLD);
 689                 mvwprintw (ctx->window,
 690                            /* y = */ 3, /* x = */ 1 + sequence,
 691                            "!");
 692                 wattroff (ctx->window, COLOR_PAIR(OPING_RED) | A_BOLD);
 693         }
 694         wrefresh (ctx->window);
 695
 696         return (0);
 697 } /* }}} int update_stats_from_context */
 698
 699 static int on_resize (pingobj_t *ping) /* {{{ */
 700 {
 701         pingobj_iter_t *iter;
 702         int width = 0;
 703         int height = 0;
 704         int main_win_height;
 705
 706         getmaxyx (stdscr, height, width);
 707         if ((height < 1) || (width < 1))
 708                 return (EINVAL);
 709
 710         main_win_height = height - (5 * host_num);
 711         wresize (main_win, main_win_height, /* width = */ width);
 712         /* Allow scrolling */
 713         scrollok (main_win, TRUE);
 714         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 715         /* Allow hardware accelerated scrolling. */
 716         idlok (main_win, TRUE);
 717         wrefresh (main_win);
 718
 719         for (iter = ping_iterator_get (ping);
 720                         iter != NULL;
 721                         iter = ping_iterator_next (iter))
 722         {
 723                 ping_context_t *context;
 724
 725                 context = ping_iterator_get_context (iter);
 726                 if (context == NULL)
 727                         continue;
 728
 729                 if (context->window != NULL)
 730                 {
 731                         delwin (context->window);
 732                         context->window = NULL;
 733                 }
 734                 context->window = newwin (/* height = */ 5,
 735                                 /* width = */ width,
 736                                 /* y = */ main_win_height + (5 * context->index),
 737                                 /* x = */ 0);
 738         }
 739
 740         return (0);
 741 } /* }}} */
 742
 743 static int check_resize (pingobj_t *ping) /* {{{ */
 744 {
 745         int need_resize = 0;
 746
 747         while (42)
 748         {
 749                 int key = wgetch (stdscr);
 750                 if (key == ERR)
 751                         break;
 752                 else if (key == KEY_RESIZE)
 753                         need_resize = 1;
 754         }
 755
 756         if (need_resize)
 757                 return (on_resize (ping));
 758         else
 759                 return (0);
 760 } /* }}} int check_resize */
 761
 762 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 763 {
 764         pingobj_iter_t *iter;
 765         int width = 0;
 766         int height = 0;
 767         int main_win_height;
 768
 769         initscr ();
 770         cbreak ();
 771         noecho ();
 772         nodelay (stdscr, TRUE);
 773
 774         getmaxyx (stdscr, height, width);
 775         if ((height < 1) || (width < 1))
 776                 return (EINVAL);
 777
 778         if (has_colors () == TRUE)
 779         {
 780                 start_color ();
 781                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 782                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 783                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 784                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
 785                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
 786                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
 787         }
 788
 789         main_win_height = height - (5 * host_num);
 790         main_win = newwin (/* height = */ main_win_height,
 791                         /* width = */ width,
 792                         /* y = */ 0, /* x = */ 0);
 793         /* Allow scrolling */
 794         scrollok (main_win, TRUE);
 795         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 796         /* Allow hardware accelerated scrolling. */
 797         idlok (main_win, TRUE);
 798         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 799         wrefresh (main_win);
 800
 801         for (iter = ping_iterator_get (ping);
 802                         iter != NULL;
 803                         iter = ping_iterator_next (iter))
 804         {
 805                 ping_context_t *context;
 806
 807                 context = ping_iterator_get_context (iter);
 808                 if (context == NULL)
 809                         continue;
 810
 811                 if (context->window != NULL)
 812                 {
 813                         delwin (context->window);
 814                         context->window = NULL;
 815                 }
 816                 context->window = newwin (/* height = */ 5,
 817                                 /* width = */ width,
 818                                 /* y = */ main_win_height + (5 * context->index),
 819                                 /* x = */ 0);
 820         }
 821
 822
 823         /* Don't know what good this does exactly, but without this code
 824          * "check_resize" will be called right after startup and *somehow*
 825          * this leads to display errors. If we purge all initial characters
 826          * here, the problem goes away. "wgetch" is non-blocking due to
 827          * "nodelay" (see above). */
 828         while (wgetch (stdscr) != ERR)
 829         {
 830                 /* eat up characters */;
 831         }
 832
 833         return (0);
 834 } /* }}} int pre_loop_hook */
 835
 836 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 837 {
 838         return (check_resize (ping));
 839 } /* }}} int pre_sleep_hook */
 840
 841 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 842 {
 843         return (check_resize (ping));
 844 } /* }}} int pre_sleep_hook */
 845 #else /* if !USE_NCURSES */
 846 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 847 {
 848         pingobj_iter_t *iter;
 849
 850         for (iter = ping_iterator_get (ping);
 851                         iter != NULL;
 852                         iter = ping_iterator_next (iter))
 853         {
 854                 ping_context_t *ctx;
 855                 size_t buffer_size;
 856
 857                 ctx = ping_iterator_get_context (iter);
 858                 if (ctx == NULL)
 859                         continue;
 860
 861                 buffer_size = 0;
 862                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 863
 864                 printf ("PING %s (%s) %zu bytes of data.\n",
 865                                 ctx->host, ctx->addr, buffer_size);
 866         }
 867
 868         return (0);
 869 } /* }}} int pre_loop_hook */
 870
 871 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 872 {
 873         fflush (stdout);
 874
 875         return (0);
 876 } /* }}} int pre_sleep_hook */
 877
 878 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 879 {
 880         return (0);
 881 } /* }}} int post_sleep_hook */
 882 #endif
 883
 884 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 885                 __attribute__((unused)) int index)
 886 {
 887         double          latency;
 888         unsigned int    sequence;
 889         int             recv_ttl;
 890         uint8_t         recv_qos;
 891         char            recv_qos_str[16];
 892         size_t          buffer_len;
 893         size_t          data_len;
 894         ping_context_t *context;
 895
 896         latency = -1.0;
 897         buffer_len = sizeof (latency);
 898         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 899                         &latency, &buffer_len);
 900
 901         sequence = 0;
 902         buffer_len = sizeof (sequence);
 903         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 904                         &sequence, &buffer_len);
 905
 906         recv_ttl = -1;
 907         buffer_len = sizeof (recv_ttl);
 908         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 909                         &recv_ttl, &buffer_len);
 910
 911         recv_qos = 0;
 912         buffer_len = sizeof (recv_qos);
 913         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 914                         &recv_qos, &buffer_len);
 915
 916         data_len = 0;
 917         ping_iterator_get_info (iter, PING_INFO_DATA,
 918                         NULL, &data_len);
 919
 920         context = (ping_context_t *) ping_iterator_get_context (iter);
 921
 922 #if USE_NCURSES
 923 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 924 #else
 925 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 926 #endif
 927
 928         context->req_sent++;
 929         if (latency > 0.0)
 930         {
 931                 context->req_rcvd++;
 932                 context->latency_total += latency;
 933                 context->latency_total_square += (latency * latency);
 934
 935                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 936                         context->latency_max = latency;
 937                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 938                         context->latency_min = latency;
 939
 940 #if USE_NCURSES
 941                 if (has_colors () == TRUE)
 942                 {
 943                         int color = OPING_GREEN;
 944                         double average = context_get_average (context);
 945                         double stddev = context_get_stddev (context);
 946
 947                         if ((latency < (average - (2 * stddev)))
 948                                         || (latency > (average + (2 * stddev))))
 949                                 color = OPING_RED;
 950                         else if ((latency < (average - stddev))
 951                                         || (latency > (average + stddev)))
 952                                 color = OPING_YELLOW;
 953
 954                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 955                                         data_len, context->host, context->addr,
 956                                         sequence, recv_ttl,
 957                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 958                         if ((recv_qos != 0) || (opt_send_qos != 0))
 959                         {
 960                                 HOST_PRINTF ("qos=%s ",
 961                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 962                         }
 963                         HOST_PRINTF ("time=");
 964                         wattron (main_win, COLOR_PAIR(color));
 965                         HOST_PRINTF ("%.2f", latency);
 966                         wattroff (main_win, COLOR_PAIR(color));
 967                         HOST_PRINTF (" ms\n");
 968                 }
 969                 else
 970                 {
 971 #endif
 972                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 973                                 data_len,
 974                                 context->host, context->addr,
 975                                 sequence, recv_ttl);
 976                 if ((recv_qos != 0) || (opt_send_qos != 0))
 977                 {
 978                         HOST_PRINTF ("qos=%s ",
 979                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 980                 }
 981                 HOST_PRINTF ("time=%.2f ms\n", latency);
 982 #if USE_NCURSES
 983                 }
 984 #endif
 985         }
 986         else
 987         {
 988 #if USE_NCURSES
 989                 if (has_colors () == TRUE)
 990                 {
 991                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 992                                         context->host, context->addr,
 993                                         sequence);
 994                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 995                         HOST_PRINTF ("timeout");
 996                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 997                         HOST_PRINTF ("\n");
 998                 }
 999                 else
1000                 {
1001 #endif
1002                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1003                                 context->host, context->addr,
1004                                 sequence);
1005 #if USE_NCURSES
1006                 }
1007 #endif
1008         }
1009
1010 #if USE_NCURSES
1011         update_stats_from_context (context, iter);
1012         wrefresh (main_win);
1013 #endif
1014 } /* }}} void update_host_hook */
1015
1016 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1017 {
1018         pingobj_iter_t *iter;
1019
1020 #if USE_NCURSES
1021         endwin ();
1022 #endif
1023
1024         for (iter = ping_iterator_get (ping);
1025                         iter != NULL;
1026                         iter = ping_iterator_next (iter))
1027         {
1028                 ping_context_t *context;
1029
1030                 context = ping_iterator_get_context (iter);
1031
1032                 printf ("\n--- %s ping statistics ---\n"
1033                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1034                                 context->host, context->req_sent, context->req_rcvd,
1035                                 context_get_packet_loss (context),
1036                                 context->latency_total);
1037
1038                 if (context->req_rcvd != 0)
1039                 {
1040                         double average;
1041                         double deviation;
1042
1043                         average = context_get_average (context);
1044                         deviation = context_get_stddev (context);
1045
1046                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1047                                         context->latency_min,
1048                                         average,
1049                                         context->latency_max,
1050                                         deviation);
1051                 }
1052
1053                 ping_iterator_set_context (iter, NULL);
1054                 context_destroy (context);
1055         }
1056
1057         return (0);
1058 } /* }}} int post_loop_hook */
1059
1060 int main (int argc, char **argv) /* {{{ */
1061 {
1062         pingobj_t      *ping;
1063         pingobj_iter_t *iter;
1064
1065         struct sigaction sigint_action;
1066
1067         struct timeval  tv_begin;
1068         struct timeval  tv_end;
1069         struct timespec ts_wait;
1070         struct timespec ts_int;
1071
1072         int optind;
1073         int i;
1074         int status;
1075 #if _POSIX_SAVED_IDS
1076         uid_t saved_set_uid;
1077
1078         /* Save the old effective user id */
1079         saved_set_uid = geteuid ();
1080         /* Set the effective user ID to the real user ID without changing the
1081          * saved set-user ID */
1082         status = seteuid (getuid ());
1083         if (status != 0)
1084         {
1085                 fprintf (stderr, "Temporarily dropping privileges "
1086                                 "failed: %s\n", strerror (errno));
1087                 exit (EXIT_FAILURE);
1088         }
1089 #endif
1090
1091         setlocale(LC_ALL, "");
1092         optind = read_options (argc, argv);
1093
1094 #if !_POSIX_SAVED_IDS
1095         /* Cannot temporarily drop privileges -> reject every file but "-". */
1096         if ((opt_filename != NULL)
1097                         && (strcmp ("-", opt_filename) != 0)
1098                         && (getuid () != geteuid ()))
1099         {
1100                 fprintf (stderr, "Your real and effective user IDs don't "
1101                                 "match. Reading from a file (option '-f')\n"
1102                                 "is therefore too risky. You can still read "
1103                                 "from STDIN using '-f -' if you like.\n"
1104                                 "Sorry.\n");
1105                 exit (EXIT_FAILURE);
1106         }
1107 #endif
1108
1109         if ((optind >= argc) && (opt_filename == NULL)) {
1110                 usage_exit (argv[0], 1);
1111         }
1112
1113         if ((ping = ping_construct ()) == NULL)
1114         {
1115                 fprintf (stderr, "ping_construct failed\n");
1116                 return (1);
1117         }
1118
1119         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1120         {
1121                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1122                                 opt_send_ttl, ping_get_error (ping));
1123         }
1124
1125         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1126         {
1127                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1128                                 opt_send_qos, ping_get_error (ping));
1129         }
1130
1131         {
1132                 double temp_sec;
1133                 double temp_nsec;
1134
1135                 temp_nsec = modf (opt_interval, &temp_sec);
1136                 ts_int.tv_sec  = (time_t) temp_sec;
1137                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1138
1139                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1140         }
1141
1142         if (opt_addrfamily != PING_DEF_AF)
1143                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1144
1145         if (opt_srcaddr != NULL)
1146         {
1147                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1148                 {
1149                         fprintf (stderr, "Setting source address failed: %s\n",
1150                                         ping_get_error (ping));
1151                 }
1152         }
1153
1154         if (opt_device != NULL)
1155         {
1156                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1157                 {
1158                         fprintf (stderr, "Setting device failed: %s\n",
1159                                         ping_get_error (ping));
1160                 }
1161         }
1162
1163         if (opt_filename != NULL)
1164         {
1165                 FILE *infile;
1166                 char line[256];
1167                 char host[256];
1168
1169                 if (strcmp (opt_filename, "-") == 0)
1170                         /* Open STDIN */
1171                         infile = fdopen(0, "r");
1172                 else
1173                         infile = fopen(opt_filename, "r");
1174
1175                 if (infile == NULL)
1176                 {
1177                         fprintf (stderr, "Opening %s failed: %s\n",
1178                                         (strcmp (opt_filename, "-") == 0)
1179                                         ? "STDIN" : opt_filename,
1180                                         strerror(errno));
1181                         return (1);
1182                 }
1183
1184 #if _POSIX_SAVED_IDS
1185                 /* Regain privileges */
1186                 status = seteuid (saved_set_uid);
1187                 if (status != 0)
1188                 {
1189                         fprintf (stderr, "Temporarily re-gaining privileges "
1190                                         "failed: %s\n", strerror (errno));
1191                         exit (EXIT_FAILURE);
1192                 }
1193 #endif
1194
1195                 while (fgets(line, sizeof(line), infile))
1196                 {
1197                         /* Strip whitespace */
1198                         if (sscanf(line, "%s", host) != 1)
1199                                 continue;
1200
1201                         if ((host[0] == 0) || (host[0] == '#'))
1202                                 continue;
1203
1204                         if (ping_host_add(ping, host) < 0)
1205                         {
1206                                 const char *errmsg = ping_get_error (ping);
1207
1208                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1209                                 continue;
1210                         }
1211                         else
1212                         {
1213                                 host_num++;
1214                         }
1215                 }
1216
1217 #if _POSIX_SAVED_IDS
1218                 /* Drop privileges */
1219                 status = seteuid (getuid ());
1220                 if (status != 0)
1221                 {
1222                         fprintf (stderr, "Temporarily dropping privileges "
1223                                         "failed: %s\n", strerror (errno));
1224                         exit (EXIT_FAILURE);
1225                 }
1226 #endif
1227
1228                 fclose(infile);
1229         }
1230
1231 #if _POSIX_SAVED_IDS
1232         /* Regain privileges */
1233         status = seteuid (saved_set_uid);
1234         if (status != 0)
1235         {
1236                 fprintf (stderr, "Temporarily re-gaining privileges "
1237                                 "failed: %s\n", strerror (errno));
1238                 exit (EXIT_FAILURE);
1239         }
1240 #endif
1241
1242         for (i = optind; i < argc; i++)
1243         {
1244                 if (ping_host_add (ping, argv[i]) < 0)
1245                 {
1246                         const char *errmsg = ping_get_error (ping);
1247
1248                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1249                         continue;
1250                 }
1251                 else
1252                 {
1253                         host_num++;
1254                 }
1255         }
1256
1257         /* Permanently drop root privileges if we're setuid-root. */
1258         status = setuid (getuid ());
1259         if (status != 0)
1260         {
1261                 fprintf (stderr, "Dropping privileges failed: %s\n",
1262                                 strerror (errno));
1263                 exit (EXIT_FAILURE);
1264         }
1265
1266 #if _POSIX_SAVED_IDS
1267         saved_set_uid = (uid_t) -1;
1268 #endif
1269
1270         ping_initialize_contexts (ping);
1271
1272         if (i == 0)
1273                 return (1);
1274
1275         memset (&sigint_action, '\0', sizeof (sigint_action));
1276         sigint_action.sa_handler = sigint_handler;
1277         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1278         {
1279                 perror ("sigaction");
1280                 return (1);
1281         }
1282
1283         pre_loop_hook (ping);
1284
1285         while (opt_count != 0)
1286         {
1287                 int index;
1288                 int status;
1289
1290                 if (gettimeofday (&tv_begin, NULL) < 0)
1291                 {
1292                         perror ("gettimeofday");
1293                         return (1);
1294                 }
1295
1296                 if (ping_send (ping) < 0)
1297                 {
1298                         fprintf (stderr, "ping_send failed: %s\n",
1299                                         ping_get_error (ping));
1300                         return (1);
1301                 }
1302
1303                 index = 0;
1304                 for (iter = ping_iterator_get (ping);
1305                                 iter != NULL;
1306                                 iter = ping_iterator_next (iter))
1307                 {
1308                         update_host_hook (iter, index);
1309                         index++;
1310                 }
1311
1312                 pre_sleep_hook (ping);
1313
1314                 /* Don't sleep in the last iteration */
1315                 if (opt_count == 1)
1316                         break;
1317
1318                 if (gettimeofday (&tv_end, NULL) < 0)
1319                 {
1320                         perror ("gettimeofday");
1321                         return (1);
1322                 }
1323
1324                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1325
1326                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1327                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1328                 {
1329                         if (errno != EINTR)
1330                         {
1331                                 perror ("nanosleep");
1332                                 break;
1333                         }
1334                         else if (opt_count == 0)
1335                         {
1336                                 /* sigint */
1337                                 break;
1338                         }
1339                 }
1340
1341                 post_sleep_hook (ping);
1342
1343                 if (opt_count > 0)
1344                         opt_count--;
1345         } /* while (opt_count != 0) */
1346
1347         post_loop_hook (ping);
1348
1349         ping_destroy (ping);
1350
1351         return (0);
1352 } /* }}} int main */
1353
1354 /* vim: set fdm=marker : */