src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 typedef struct ping_context
  93 {
  94         char host[NI_MAXHOST];
  95         char addr[NI_MAXHOST];
  96
  97         int index;
  98         int req_sent;
  99         int req_rcvd;
 100
 101         double latency_min;
 102         double latency_max;
 103         double latency_total;
 104         double latency_total_square;
 105
 106 #if USE_NCURSES
 107         WINDOW *window;
 108 #endif
 109 } ping_context_t;
 110
 111 static double  opt_interval   = 1.0;
 112 static int     opt_addrfamily = PING_DEF_AF;
 113 static char   *opt_srcaddr    = NULL;
 114 static char   *opt_device     = NULL;
 115 static char   *opt_filename   = NULL;
 116 static int     opt_count      = -1;
 117 static int     opt_send_ttl   = 64;
 118 static uint8_t opt_send_qos   = 0;
 119
 120 static int host_num = 0;
 121
 122 #if USE_NCURSES
 123 static WINDOW *main_win = NULL;
 124 #endif
 125
 126 static void sigint_handler (int signal) /* {{{ */
 127 {
 128         /* Make compiler happy */
 129         signal = 0;
 130         /* Exit the loop */
 131         opt_count = 0;
 132 } /* }}} void sigint_handler */
 133
 134 static ping_context_t *context_create (void) /* {{{ */
 135 {
 136         ping_context_t *ret;
 137
 138         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 139                 return (NULL);
 140
 141         memset (ret, '\0', sizeof (ping_context_t));
 142
 143         ret->latency_min   = -1.0;
 144         ret->latency_max   = -1.0;
 145         ret->latency_total = 0.0;
 146         ret->latency_total_square = 0.0;
 147
 148 #if USE_NCURSES
 149         ret->window = NULL;
 150 #endif
 151
 152         return (ret);
 153 } /* }}} ping_context_t *context_create */
 154
 155 static void context_destroy (ping_context_t *context) /* {{{ */
 156 {
 157         if (context == NULL)
 158                 return;
 159
 160 #if USE_NCURSES
 161         if (context->window != NULL)
 162         {
 163                 delwin (context->window);
 164                 context->window = NULL;
 165         }
 166 #endif
 167
 168         free (context);
 169 } /* }}} void context_destroy */
 170
 171 static double context_get_average (ping_context_t *ctx) /* {{{ */
 172 {
 173         double num_total;
 174
 175         if (ctx == NULL)
 176                 return (-1.0);
 177
 178         if (ctx->req_rcvd < 1)
 179                 return (-0.0);
 180
 181         num_total = (double) ctx->req_rcvd;
 182         return (ctx->latency_total / num_total);
 183 } /* }}} double context_get_average */
 184
 185 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 186 {
 187         double num_total;
 188
 189         if (ctx == NULL)
 190                 return (-1.0);
 191
 192         if (ctx->req_rcvd < 1)
 193                 return (-0.0);
 194         else if (ctx->req_rcvd < 2)
 195                 return (0.0);
 196
 197         num_total = (double) ctx->req_rcvd;
 198         return (sqrt (((num_total * ctx->latency_total_square)
 199                                         - (ctx->latency_total * ctx->latency_total))
 200                                 / (num_total * (num_total - 1.0))));
 201 } /* }}} double context_get_stddev */
 202
 203 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 204 {
 205         if (ctx == NULL)
 206                 return (-1.0);
 207
 208         if (ctx->req_sent < 1)
 209                 return (0.0);
 210
 211         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 212                         / ((double) ctx->req_sent));
 213 } /* }}} double context_get_packet_loss */
 214
 215 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 216 {
 217         pingobj_iter_t *iter;
 218         int index;
 219
 220         if (ping == NULL)
 221                 return (EINVAL);
 222
 223         index = 0;
 224         for (iter = ping_iterator_get (ping);
 225                         iter != NULL;
 226                         iter = ping_iterator_next (iter))
 227         {
 228                 ping_context_t *context;
 229                 size_t buffer_size;
 230
 231                 context = context_create ();
 232                 context->index = index;
 233
 234                 buffer_size = sizeof (context->host);
 235                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 236
 237                 buffer_size = sizeof (context->addr);
 238                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 239
 240                 ping_iterator_set_context (iter, (void *) context);
 241
 242                 index++;
 243         }
 244
 245         return (0);
 246 } /* }}} int ping_initialize_contexts */
 247
 248 static void usage_exit (const char *name, int status) /* {{{ */
 249 {
 250         fprintf (stderr, "Usage: %s [OPTIONS] "
 251                                 "-f filename | host [host [host ...]]\n"
 252
 253                         "\nAvailable options:\n"
 254                         "  -4|-6        force the use of IPv4 or IPv6\n"
 255                         "  -c count     number of ICMP packets to send\n"
 256                         "  -i interval  interval with which to send ICMP packets\n"
 257                         "  -t ttl       time to live for each ICMP packet\n"
 258                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 259                         "               Use \"-Q help\" for a list of valid options.\n"
 260                         "  -I srcaddr   source address\n"
 261                         "  -D device    outgoing interface name\n"
 262                         "  -f filename  filename to read hosts from\n"
 263
 264                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 265                         "by Florian octo Forster <octo@verplant.org>\n"
 266                         "for contributions see `AUTHORS'\n",
 267                         name);
 268         exit (status);
 269 } /* }}} void usage_exit */
 270
 271 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 272 {
 273         if (arg != 0)
 274                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 275
 276         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 277                         "\n"
 278                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 279                         "\n"
 280                         "    be                     Best Effort (BE, default PHB).\n"
 281                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 282                         "                           (low delay, low loss, low jitter)\n"
 283                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 284                         "                           (capacity-admitted traffic)\n"
 285                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 286                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 287                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 288                         "                           For example: \"cs1\" (priority traffic)\n"
 289                         "\n"
 290                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 291                         "\n"
 292                         "    lowdelay     (%#04x)    minimize delay\n"
 293                         "    throughput   (%#04x)    maximize throughput\n"
 294                         "    reliability  (%#04x)    maximize reliability\n"
 295                         "    mincost      (%#04x)    minimize monetary cost\n"
 296                         "\n"
 297                         "  Specify manually\n"
 298                         "\n"
 299                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 300                         "       0 -  255            Decimal numeric specification.\n"
 301                         "\n",
 302                         (unsigned int) IPTOS_LOWDELAY,
 303                         (unsigned int) IPTOS_THROUGHPUT,
 304                         (unsigned int) IPTOS_RELIABILITY,
 305                         (unsigned int) IPTOS_MINCOST);
 306
 307         exit (status);
 308 } /* }}} void usage_qos_exit */
 309
 310 static int set_opt_send_qos (const char *opt) /* {{{ */
 311 {
 312         if (opt == NULL)
 313                 return (EINVAL);
 314
 315         if (strcasecmp ("help", opt) == 0)
 316                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 317         /* DiffServ (RFC 2474): */
 318         /* - Best effort (BE) */
 319         else if (strcasecmp ("be", opt) == 0)
 320                 opt_send_qos = 0;
 321         /* - Expedited Forwarding (EF, RFC 3246) */
 322         else if (strcasecmp ("ef", opt) == 0)
 323                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 324         /* - Voice Admit (VA, RFC 5865) */
 325         else if (strcasecmp ("va", opt) == 0)
 326                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 327         /* - Assured Forwarding (AF, RFC 2597) */
 328         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 329                         && (strlen (opt) == 4))
 330         {
 331                 uint8_t dscp;
 332                 uint8_t class;
 333                 uint8_t prec;
 334
 335                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 336                 if (opt[2] == '1')
 337                         class = 1;
 338                 else if (opt[2] == '2')
 339                         class = 2;
 340                 else if (opt[2] == '3')
 341                         class = 3;
 342                 else if (opt[2] == '4')
 343                         class = 4;
 344                 else
 345                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 346
 347                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 348                 if (opt[3] == '1')
 349                         prec = 1;
 350                 else if (opt[3] == '2')
 351                         prec = 2;
 352                 else if (opt[3] == '3')
 353                         prec = 3;
 354                 else
 355                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 356
 357                 dscp = (8 * class) + (2 * prec);
 358                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 359                 opt_send_qos = dscp << 2;
 360         }
 361         /* - Class Selector (CS) */
 362         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 363                         && (strlen (opt) == 3))
 364         {
 365                 uint8_t class;
 366
 367                 if ((opt[2] < '0') || (opt[2] > '7'))
 368                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 369
 370                 /* Not exactly legal by the C standard, but I don't know of any
 371                  * system not supporting this hack. */
 372                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 373                 opt_send_qos = class << 5;
 374         }
 375         /* Type of Service (RFC 1349) */
 376         else if (strcasecmp ("lowdelay", opt) == 0)
 377                 opt_send_qos = IPTOS_LOWDELAY;
 378         else if (strcasecmp ("throughput", opt) == 0)
 379                 opt_send_qos = IPTOS_THROUGHPUT;
 380         else if (strcasecmp ("reliability", opt) == 0)
 381                 opt_send_qos = IPTOS_RELIABILITY;
 382         else if (strcasecmp ("mincost", opt) == 0)
 383                 opt_send_qos = IPTOS_MINCOST;
 384         /* Numeric value */
 385         else
 386         {
 387                 unsigned long value;
 388                 char *endptr;
 389
 390                 errno = 0;
 391                 endptr = NULL;
 392                 value = strtoul (opt, &endptr, /* base = */ 0);
 393                 if ((errno != 0) || (endptr == opt)
 394                                 || (endptr == NULL) || (*endptr != 0)
 395                                 || (value > 0xff))
 396                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 397
 398                 opt_send_qos = (uint8_t) value;
 399         }
 400
 401         return (0);
 402 } /* }}} int set_opt_send_qos */
 403
 404 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 405 {
 406         uint8_t dscp;
 407         uint8_t ecn;
 408         char *dscp_str;
 409         char *ecn_str;
 410
 411         dscp = qos >> 2;
 412         ecn = qos & 0x03;
 413
 414         switch (dscp)
 415         {
 416                 case 0x00: dscp_str = "be";  break;
 417                 case 0x2e: dscp_str = "ef";  break;
 418                 case 0x2d: dscp_str = "va";  break;
 419                 case 0x0a: dscp_str = "af11"; break;
 420                 case 0x0c: dscp_str = "af12"; break;
 421                 case 0x0e: dscp_str = "af13"; break;
 422                 case 0x12: dscp_str = "af21"; break;
 423                 case 0x14: dscp_str = "af22"; break;
 424                 case 0x16: dscp_str = "af23"; break;
 425                 case 0x1a: dscp_str = "af31"; break;
 426                 case 0x1c: dscp_str = "af32"; break;
 427                 case 0x1e: dscp_str = "af33"; break;
 428                 case 0x22: dscp_str = "af41"; break;
 429                 case 0x24: dscp_str = "af42"; break;
 430                 case 0x26: dscp_str = "af43"; break;
 431                 case 0x08: dscp_str = "cs1";  break;
 432                 case 0x10: dscp_str = "cs2";  break;
 433                 case 0x18: dscp_str = "cs3";  break;
 434                 case 0x20: dscp_str = "cs4";  break;
 435                 case 0x28: dscp_str = "cs5";  break;
 436                 case 0x30: dscp_str = "cs6";  break;
 437                 case 0x38: dscp_str = "cs7";  break;
 438                 default:   dscp_str = NULL;
 439         }
 440
 441         switch (ecn)
 442         {
 443                 case 0x01: ecn_str = ",ecn(1)"; break;
 444                 case 0x02: ecn_str = ",ecn(0)"; break;
 445                 case 0x03: ecn_str = ",ce"; break;
 446                 default:   ecn_str = "";
 447         }
 448
 449         if (dscp_str == NULL)
 450                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 451         else
 452                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 453         buffer[buffer_size - 1] = 0;
 454
 455         return (buffer);
 456 } /* }}} char *format_qos */
 457
 458 static int read_options (int argc, char **argv) /* {{{ */
 459 {
 460         int optchar;
 461
 462         while (1)
 463         {
 464                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 465
 466                 if (optchar == -1)
 467                         break;
 468
 469                 switch (optchar)
 470                 {
 471                         case '4':
 472                         case '6':
 473                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 474                                 break;
 475
 476                         case 'c':
 477                                 {
 478                                         int new_count;
 479                                         new_count = atoi (optarg);
 480                                         if (new_count > 0)
 481                                                 opt_count = new_count;
 482                                         else
 483                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 484                                                                 optarg);
 485                                 }
 486                                 break;
 487
 488                         case 'f':
 489                                 {
 490                                         if (opt_filename != NULL)
 491                                                 free (opt_filename);
 492                                         opt_filename = strdup (optarg);
 493                                 }
 494                                 break;
 495
 496                         case 'i':
 497                                 {
 498                                         double new_interval;
 499                                         new_interval = atof (optarg);
 500                                         if (new_interval < 0.001)
 501                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 502                                                                 optarg);
 503                                         else
 504                                                 opt_interval = new_interval;
 505                                 }
 506                                 break;
 507                         case 'I':
 508                                 {
 509                                         if (opt_srcaddr != NULL)
 510                                                 free (opt_srcaddr);
 511                                         opt_srcaddr = strdup (optarg);
 512                                 }
 513                                 break;
 514
 515                         case 'D':
 516                                 opt_device = optarg;
 517                                 break;
 518
 519                         case 't':
 520                         {
 521                                 int new_send_ttl;
 522                                 new_send_ttl = atoi (optarg);
 523                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 524                                         opt_send_ttl = new_send_ttl;
 525                                 else
 526                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 527                                                         optarg);
 528                                 break;
 529                         }
 530
 531                         case 'Q':
 532                                 set_opt_send_qos (optarg);
 533                                 break;
 534
 535                         case 'h':
 536                                 usage_exit (argv[0], 0);
 537                                 break;
 538                         default:
 539                                 usage_exit (argv[0], 1);
 540                 }
 541         }
 542
 543         return (optind);
 544 } /* }}} read_options */
 545
 546 static void time_normalize (struct timespec *ts) /* {{{ */
 547 {
 548         while (ts->tv_nsec < 0)
 549         {
 550                 if (ts->tv_sec == 0)
 551                 {
 552                         ts->tv_nsec = 0;
 553                         return;
 554                 }
 555
 556                 ts->tv_sec  -= 1;
 557                 ts->tv_nsec += 1000000000;
 558         }
 559
 560         while (ts->tv_nsec >= 1000000000)
 561         {
 562                 ts->tv_sec  += 1;
 563                 ts->tv_nsec -= 1000000000;
 564         }
 565 } /* }}} void time_normalize */
 566
 567 static void time_calc (struct timespec *ts_dest, /* {{{ */
 568                 const struct timespec *ts_int,
 569                 const struct timeval  *tv_begin,
 570                 const struct timeval  *tv_end)
 571 {
 572         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 573         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 574         time_normalize (ts_dest);
 575
 576         /* Assure that `(begin + interval) > end'.
 577          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 578          * which may be `unsigned. *sigh* */
 579         if ((tv_end->tv_sec > ts_dest->tv_sec)
 580                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 581                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 582         {
 583                 ts_dest->tv_sec  = 0;
 584                 ts_dest->tv_nsec = 0;
 585                 return;
 586         }
 587
 588         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 589         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 590         time_normalize (ts_dest);
 591 } /* }}} void time_calc */
 592
 593 #if USE_NCURSES
 594 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 595 {
 596         if ((ctx == NULL) || (ctx->window == NULL))
 597                 return (EINVAL);
 598
 599         werase (ctx->window);
 600
 601         box (ctx->window, 0, 0);
 602         wattron (ctx->window, A_BOLD);
 603         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 604                         " %s ", ctx->host);
 605         wattroff (ctx->window, A_BOLD);
 606         wprintw (ctx->window, "ping statistics ");
 607         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 608                         "%i packets transmitted, %i received, %.2f%% packet "
 609                         "loss, time %.1fms",
 610                         ctx->req_sent, ctx->req_rcvd,
 611                         context_get_packet_loss (ctx),
 612                         ctx->latency_total);
 613         if (ctx->req_rcvd != 0)
 614         {
 615                 double average;
 616                 double deviation;
 617
 618                 average = context_get_average (ctx);
 619                 deviation = context_get_stddev (ctx);
 620
 621                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 622                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 623                                 ctx->latency_min,
 624                                 average,
 625                                 ctx->latency_max,
 626                                 deviation);
 627         }
 628
 629         wrefresh (ctx->window);
 630
 631         return (0);
 632 } /* }}} int update_stats_from_context */
 633
 634 static int on_resize (pingobj_t *ping) /* {{{ */
 635 {
 636         pingobj_iter_t *iter;
 637         int width = 0;
 638         int height = 0;
 639         int main_win_height;
 640
 641         getmaxyx (stdscr, height, width);
 642         if ((height < 1) || (width < 1))
 643                 return (EINVAL);
 644
 645         main_win_height = height - (4 * host_num);
 646         wresize (main_win, main_win_height, /* width = */ width);
 647         /* Allow scrolling */
 648         scrollok (main_win, TRUE);
 649         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 650         /* Allow hardware accelerated scrolling. */
 651         idlok (main_win, TRUE);
 652         wrefresh (main_win);
 653
 654         for (iter = ping_iterator_get (ping);
 655                         iter != NULL;
 656                         iter = ping_iterator_next (iter))
 657         {
 658                 ping_context_t *context;
 659
 660                 context = ping_iterator_get_context (iter);
 661                 if (context == NULL)
 662                         continue;
 663
 664                 if (context->window != NULL)
 665                 {
 666                         delwin (context->window);
 667                         context->window = NULL;
 668                 }
 669                 context->window = newwin (/* height = */ 4,
 670                                 /* width = */ 0,
 671                                 /* y = */ main_win_height + (4 * context->index),
 672                                 /* x = */ 0);
 673         }
 674
 675         return (0);
 676 } /* }}} */
 677
 678 static int check_resize (pingobj_t *ping) /* {{{ */
 679 {
 680         int need_resize = 0;
 681
 682         while (42)
 683         {
 684                 int key = wgetch (stdscr);
 685                 if (key == ERR)
 686                         break;
 687                 else if (key == KEY_RESIZE)
 688                         need_resize = 1;
 689         }
 690
 691         if (need_resize)
 692                 return (on_resize (ping));
 693         else
 694                 return (0);
 695 } /* }}} int check_resize */
 696
 697 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 698 {
 699         pingobj_iter_t *iter;
 700         int width = 0;
 701         int height = 0;
 702         int main_win_height;
 703
 704         initscr ();
 705         cbreak ();
 706         noecho ();
 707         nodelay (stdscr, TRUE);
 708
 709         getmaxyx (stdscr, height, width);
 710         if ((height < 1) || (width < 1))
 711                 return (EINVAL);
 712
 713         if (has_colors () == TRUE)
 714         {
 715                 start_color ();
 716                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 717                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 718                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 719         }
 720
 721         main_win_height = height - (4 * host_num);
 722         main_win = newwin (/* height = */ main_win_height,
 723                         /* width = */ 0,
 724                         /* y = */ 0, /* x = */ 0);
 725         /* Allow scrolling */
 726         scrollok (main_win, TRUE);
 727         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 728         /* Allow hardware accelerated scrolling. */
 729         idlok (main_win, TRUE);
 730         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 731         wrefresh (main_win);
 732
 733         for (iter = ping_iterator_get (ping);
 734                         iter != NULL;
 735                         iter = ping_iterator_next (iter))
 736         {
 737                 ping_context_t *context;
 738
 739                 context = ping_iterator_get_context (iter);
 740                 if (context == NULL)
 741                         continue;
 742
 743                 if (context->window != NULL)
 744                 {
 745                         delwin (context->window);
 746                         context->window = NULL;
 747                 }
 748                 context->window = newwin (/* height = */ 4,
 749                                 /* width = */ 0,
 750                                 /* y = */ main_win_height + (4 * context->index),
 751                                 /* x = */ 0);
 752         }
 753
 754
 755         /* Don't know what good this does exactly, but without this code
 756          * "check_resize" will be called right after startup and *somehow*
 757          * this leads to display errors. If we purge all initial characters
 758          * here, the problem goes away. "wgetch" is non-blocking due to
 759          * "nodelay" (see above). */
 760         while (wgetch (stdscr) != ERR)
 761         {
 762                 /* eat up characters */;
 763         }
 764
 765         return (0);
 766 } /* }}} int pre_loop_hook */
 767
 768 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 769 {
 770         return (check_resize (ping));
 771 } /* }}} int pre_sleep_hook */
 772
 773 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 774 {
 775         return (check_resize (ping));
 776 } /* }}} int pre_sleep_hook */
 777 #else /* if !USE_NCURSES */
 778 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 779 {
 780         pingobj_iter_t *iter;
 781
 782         for (iter = ping_iterator_get (ping);
 783                         iter != NULL;
 784                         iter = ping_iterator_next (iter))
 785         {
 786                 ping_context_t *ctx;
 787                 size_t buffer_size;
 788
 789                 ctx = ping_iterator_get_context (iter);
 790                 if (ctx == NULL)
 791                         continue;
 792
 793                 buffer_size = 0;
 794                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 795
 796                 printf ("PING %s (%s) %zu bytes of data.\n",
 797                                 ctx->host, ctx->addr, buffer_size);
 798         }
 799
 800         return (0);
 801 } /* }}} int pre_loop_hook */
 802
 803 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 804 {
 805         fflush (stdout);
 806
 807         return (0);
 808 } /* }}} int pre_sleep_hook */
 809
 810 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 811 {
 812         return (0);
 813 } /* }}} int post_sleep_hook */
 814 #endif
 815
 816 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 817                 int index)
 818 {
 819         double          latency;
 820         unsigned int    sequence;
 821         int             recv_ttl;
 822         uint8_t         recv_qos;
 823         char            recv_qos_str[16];
 824         size_t          buffer_len;
 825         size_t          data_len;
 826         ping_context_t *context;
 827
 828         latency = -1.0;
 829         buffer_len = sizeof (latency);
 830         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 831                         &latency, &buffer_len);
 832
 833         sequence = 0;
 834         buffer_len = sizeof (sequence);
 835         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 836                         &sequence, &buffer_len);
 837
 838         recv_ttl = -1;
 839         buffer_len = sizeof (recv_ttl);
 840         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 841                         &recv_ttl, &buffer_len);
 842
 843         recv_qos = 0;
 844         buffer_len = sizeof (recv_qos);
 845         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 846                         &recv_qos, &buffer_len);
 847
 848         data_len = 0;
 849         ping_iterator_get_info (iter, PING_INFO_DATA,
 850                         NULL, &data_len);
 851
 852         context = (ping_context_t *) ping_iterator_get_context (iter);
 853
 854 #if USE_NCURSES
 855 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 856 #else
 857 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 858 #endif
 859
 860         context->req_sent++;
 861         if (latency > 0.0)
 862         {
 863                 context->req_rcvd++;
 864                 context->latency_total += latency;
 865                 context->latency_total_square += (latency * latency);
 866
 867                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 868                         context->latency_max = latency;
 869                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 870                         context->latency_min = latency;
 871
 872 #if USE_NCURSES
 873                 if (has_colors () == TRUE)
 874                 {
 875                         int color = OPING_GREEN;
 876                         double average = context_get_average (context);
 877                         double stddev = context_get_stddev (context);
 878
 879                         if ((latency < (average - (2 * stddev)))
 880                                         || (latency > (average + (2 * stddev))))
 881                                 color = OPING_RED;
 882                         else if ((latency < (average - stddev))
 883                                         || (latency > (average + stddev)))
 884                                 color = OPING_YELLOW;
 885
 886                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 887                                         data_len, context->host, context->addr,
 888                                         sequence, recv_ttl,
 889                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 890                         if ((recv_qos != 0) || (opt_send_qos != 0))
 891                         {
 892                                 HOST_PRINTF ("qos=%s ",
 893                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 894                         }
 895                         HOST_PRINTF ("time=");
 896                         wattron (main_win, COLOR_PAIR(color));
 897                         HOST_PRINTF ("%.2f", latency);
 898                         wattroff (main_win, COLOR_PAIR(color));
 899                         HOST_PRINTF (" ms\n");
 900                 }
 901                 else
 902                 {
 903 #endif
 904                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 905                                 data_len,
 906                                 context->host, context->addr,
 907                                 sequence, recv_ttl);
 908                 if ((recv_qos != 0) || (opt_send_qos != 0))
 909                 {
 910                         HOST_PRINTF ("qos=%s ",
 911                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 912                 }
 913                 HOST_PRINTF ("time=%.2f ms\n", latency);
 914 #if USE_NCURSES
 915                 }
 916 #endif
 917         }
 918         else
 919         {
 920 #if USE_NCURSES
 921                 if (has_colors () == TRUE)
 922                 {
 923                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 924                                         context->host, context->addr,
 925                                         sequence);
 926                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 927                         HOST_PRINTF ("timeout");
 928                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 929                         HOST_PRINTF ("\n");
 930                 }
 931                 else
 932                 {
 933 #endif
 934                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 935                                 context->host, context->addr,
 936                                 sequence);
 937 #if USE_NCURSES
 938                 }
 939 #endif
 940         }
 941
 942 #if USE_NCURSES
 943         update_stats_from_context (context);
 944         wrefresh (main_win);
 945 #endif
 946 } /* }}} void update_host_hook */
 947
 948 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 949 {
 950         pingobj_iter_t *iter;
 951
 952 #if USE_NCURSES
 953         endwin ();
 954 #endif
 955
 956         for (iter = ping_iterator_get (ping);
 957                         iter != NULL;
 958                         iter = ping_iterator_next (iter))
 959         {
 960                 ping_context_t *context;
 961
 962                 context = ping_iterator_get_context (iter);
 963
 964                 printf ("\n--- %s ping statistics ---\n"
 965                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 966                                 context->host, context->req_sent, context->req_rcvd,
 967                                 context_get_packet_loss (context),
 968                                 context->latency_total);
 969
 970                 if (context->req_rcvd != 0)
 971                 {
 972                         double average;
 973                         double deviation;
 974
 975                         average = context_get_average (context);
 976                         deviation = context_get_stddev (context);
 977
 978                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 979                                         context->latency_min,
 980                                         average,
 981                                         context->latency_max,
 982                                         deviation);
 983                 }
 984
 985                 ping_iterator_set_context (iter, NULL);
 986                 context_destroy (context);
 987         }
 988
 989         return (0);
 990 } /* }}} int post_loop_hook */
 991
 992 int main (int argc, char **argv) /* {{{ */
 993 {
 994         pingobj_t      *ping;
 995         pingobj_iter_t *iter;
 996
 997         struct sigaction sigint_action;
 998
 999         struct timeval  tv_begin;
1000         struct timeval  tv_end;
1001         struct timespec ts_wait;
1002         struct timespec ts_int;
1003
1004         int optind;
1005         int i;
1006         int status;
1007 #if _POSIX_SAVED_IDS
1008         uid_t saved_set_uid;
1009
1010         /* Save the old effective user id */
1011         saved_set_uid = geteuid ();
1012         /* Set the effective user ID to the real user ID without changing the
1013          * saved set-user ID */
1014         status = seteuid (getuid ());
1015         if (status != 0)
1016         {
1017                 fprintf (stderr, "Temporarily dropping privileges "
1018                                 "failed: %s\n", strerror (errno));
1019                 exit (EXIT_FAILURE);
1020         }
1021 #endif
1022
1023         optind = read_options (argc, argv);
1024
1025 #if !_POSIX_SAVED_IDS
1026         /* Cannot temporarily drop privileges -> reject every file but "-". */
1027         if ((opt_filename != NULL)
1028                         && (strcmp ("-", opt_filename) != 0)
1029                         && (getuid () != geteuid ()))
1030         {
1031                 fprintf (stderr, "Your real and effective user IDs don't "
1032                                 "match. Reading from a file (option '-f')\n"
1033                                 "is therefore too risky. You can still read "
1034                                 "from STDIN using '-f -' if you like.\n"
1035                                 "Sorry.\n");
1036                 exit (EXIT_FAILURE);
1037         }
1038 #endif
1039
1040         if ((optind >= argc) && (opt_filename == NULL)) {
1041                 usage_exit (argv[0], 1);
1042         }
1043
1044         if ((ping = ping_construct ()) == NULL)
1045         {
1046                 fprintf (stderr, "ping_construct failed\n");
1047                 return (1);
1048         }
1049
1050         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1051         {
1052                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1053                                 opt_send_ttl, ping_get_error (ping));
1054         }
1055
1056         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1057         {
1058                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1059                                 opt_send_qos, ping_get_error (ping));
1060         }
1061
1062         {
1063                 double temp_sec;
1064                 double temp_nsec;
1065
1066                 temp_nsec = modf (opt_interval, &temp_sec);
1067                 ts_int.tv_sec  = (time_t) temp_sec;
1068                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1069
1070                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1071         }
1072
1073         if (opt_addrfamily != PING_DEF_AF)
1074                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1075
1076         if (opt_srcaddr != NULL)
1077         {
1078                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1079                 {
1080                         fprintf (stderr, "Setting source address failed: %s\n",
1081                                         ping_get_error (ping));
1082                 }
1083         }
1084
1085         if (opt_device != NULL)
1086         {
1087                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1088                 {
1089                         fprintf (stderr, "Setting device failed: %s\n",
1090                                         ping_get_error (ping));
1091                 }
1092         }
1093
1094         if (opt_filename != NULL)
1095         {
1096                 FILE *infile;
1097                 char line[256];
1098                 char host[256];
1099
1100                 if (strcmp (opt_filename, "-") == 0)
1101                         /* Open STDIN */
1102                         infile = fdopen(0, "r");
1103                 else
1104                         infile = fopen(opt_filename, "r");
1105
1106                 if (infile == NULL)
1107                 {
1108                         fprintf (stderr, "Opening %s failed: %s\n",
1109                                         (strcmp (opt_filename, "-") == 0)
1110                                         ? "STDIN" : opt_filename,
1111                                         strerror(errno));
1112                         return (1);
1113                 }
1114
1115 #if _POSIX_SAVED_IDS
1116                 /* Regain privileges */
1117                 status = seteuid (saved_set_uid);
1118                 if (status != 0)
1119                 {
1120                         fprintf (stderr, "Temporarily re-gaining privileges "
1121                                         "failed: %s\n", strerror (errno));
1122                         exit (EXIT_FAILURE);
1123                 }
1124 #endif
1125
1126                 while (fgets(line, sizeof(line), infile))
1127                 {
1128                         /* Strip whitespace */
1129                         if (sscanf(line, "%s", host) != 1)
1130                                 continue;
1131
1132                         if ((host[0] == 0) || (host[0] == '#'))
1133                                 continue;
1134
1135                         if (ping_host_add(ping, host) < 0)
1136                         {
1137                                 const char *errmsg = ping_get_error (ping);
1138
1139                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1140                                 continue;
1141                         }
1142                         else
1143                         {
1144                                 host_num++;
1145                         }
1146                 }
1147
1148 #if _POSIX_SAVED_IDS
1149                 /* Drop privileges */
1150                 status = seteuid (getuid ());
1151                 if (status != 0)
1152                 {
1153                         fprintf (stderr, "Temporarily dropping privileges "
1154                                         "failed: %s\n", strerror (errno));
1155                         exit (EXIT_FAILURE);
1156                 }
1157 #endif
1158
1159                 fclose(infile);
1160         }
1161
1162 #if _POSIX_SAVED_IDS
1163         /* Regain privileges */
1164         status = seteuid (saved_set_uid);
1165         if (status != 0)
1166         {
1167                 fprintf (stderr, "Temporarily re-gaining privileges "
1168                                 "failed: %s\n", strerror (errno));
1169                 exit (EXIT_FAILURE);
1170         }
1171 #endif
1172
1173         for (i = optind; i < argc; i++)
1174         {
1175                 if (ping_host_add (ping, argv[i]) < 0)
1176                 {
1177                         const char *errmsg = ping_get_error (ping);
1178
1179                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1180                         continue;
1181                 }
1182                 else
1183                 {
1184                         host_num++;
1185                 }
1186         }
1187
1188         /* Permanently drop root privileges if we're setuid-root. */
1189         status = setuid (getuid ());
1190         if (status != 0)
1191         {
1192                 fprintf (stderr, "Dropping privileges failed: %s\n",
1193                                 strerror (errno));
1194                 exit (EXIT_FAILURE);
1195         }
1196
1197 #if _POSIX_SAVED_IDS
1198         saved_set_uid = (uid_t) -1;
1199 #endif
1200
1201         ping_initialize_contexts (ping);
1202
1203         if (i == 0)
1204                 return (1);
1205
1206         memset (&sigint_action, '\0', sizeof (sigint_action));
1207         sigint_action.sa_handler = sigint_handler;
1208         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1209         {
1210                 perror ("sigaction");
1211                 return (1);
1212         }
1213
1214         pre_loop_hook (ping);
1215
1216         while (opt_count != 0)
1217         {
1218                 int index;
1219                 int status;
1220
1221                 if (gettimeofday (&tv_begin, NULL) < 0)
1222                 {
1223                         perror ("gettimeofday");
1224                         return (1);
1225                 }
1226
1227                 if (ping_send (ping) < 0)
1228                 {
1229                         fprintf (stderr, "ping_send failed: %s\n",
1230                                         ping_get_error (ping));
1231                         return (1);
1232                 }
1233
1234                 index = 0;
1235                 for (iter = ping_iterator_get (ping);
1236                                 iter != NULL;
1237                                 iter = ping_iterator_next (iter))
1238                 {
1239                         update_host_hook (iter, index);
1240                         index++;
1241                 }
1242
1243                 pre_sleep_hook (ping);
1244
1245                 /* Don't sleep in the last iteration */
1246                 if (opt_count == 1)
1247                         break;
1248
1249                 if (gettimeofday (&tv_end, NULL) < 0)
1250                 {
1251                         perror ("gettimeofday");
1252                         return (1);
1253                 }
1254
1255                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1256
1257                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1258                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1259                 {
1260                         if (errno != EINTR)
1261                         {
1262                                 perror ("nanosleep");
1263                                 break;
1264                         }
1265                         else if (opt_count == 0)
1266                         {
1267                                 /* sigint */
1268                                 break;
1269                         }
1270                 }
1271
1272                 post_sleep_hook (ping);
1273
1274                 if (opt_count > 0)
1275                         opt_count--;
1276         } /* while (opt_count != 0) */
1277
1278         post_loop_hook (ping);
1279
1280         ping_destroy (ping);
1281
1282         return (0);
1283 } /* }}} int main */
1284
1285 /* vim: set fdm=marker : */