src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 #ifndef IPTOS_MINCOST
  93 # define IPTOS_MINCOST 0x02
  94 #endif
  95
  96 /* Remove GNU specific __attribute__ settings when using another compiler */
  97 #if !__GNUC__
  98 # define __attribute__(x) /**/
  99 #endif
 100
 101 typedef struct ping_context
 102 {
 103         char host[NI_MAXHOST];
 104         char addr[NI_MAXHOST];
 105
 106         int index;
 107         int req_sent;
 108         int req_rcvd;
 109
 110         double latency_min;
 111         double latency_max;
 112         double latency_total;
 113         double latency_total_square;
 114
 115 #if USE_NCURSES
 116         WINDOW *window;
 117 #endif
 118 } ping_context_t;
 119
 120 static double  opt_interval   = 1.0;
 121 static int     opt_addrfamily = PING_DEF_AF;
 122 static char   *opt_srcaddr    = NULL;
 123 static char   *opt_device     = NULL;
 124 static char   *opt_filename   = NULL;
 125 static int     opt_count      = -1;
 126 static int     opt_send_ttl   = 64;
 127 static uint8_t opt_send_qos   = 0;
 128
 129 static int host_num = 0;
 130
 131 #if USE_NCURSES
 132 static WINDOW *main_win = NULL;
 133 #endif
 134
 135 static void sigint_handler (int signal) /* {{{ */
 136 {
 137         /* Make compiler happy */
 138         signal = 0;
 139         /* Exit the loop */
 140         opt_count = 0;
 141 } /* }}} void sigint_handler */
 142
 143 static ping_context_t *context_create (void) /* {{{ */
 144 {
 145         ping_context_t *ret;
 146
 147         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 148                 return (NULL);
 149
 150         memset (ret, '\0', sizeof (ping_context_t));
 151
 152         ret->latency_min   = -1.0;
 153         ret->latency_max   = -1.0;
 154         ret->latency_total = 0.0;
 155         ret->latency_total_square = 0.0;
 156
 157 #if USE_NCURSES
 158         ret->window = NULL;
 159 #endif
 160
 161         return (ret);
 162 } /* }}} ping_context_t *context_create */
 163
 164 static void context_destroy (ping_context_t *context) /* {{{ */
 165 {
 166         if (context == NULL)
 167                 return;
 168
 169 #if USE_NCURSES
 170         if (context->window != NULL)
 171         {
 172                 delwin (context->window);
 173                 context->window = NULL;
 174         }
 175 #endif
 176
 177         free (context);
 178 } /* }}} void context_destroy */
 179
 180 static double context_get_average (ping_context_t *ctx) /* {{{ */
 181 {
 182         double num_total;
 183
 184         if (ctx == NULL)
 185                 return (-1.0);
 186
 187         if (ctx->req_rcvd < 1)
 188                 return (-0.0);
 189
 190         num_total = (double) ctx->req_rcvd;
 191         return (ctx->latency_total / num_total);
 192 } /* }}} double context_get_average */
 193
 194 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 195 {
 196         double num_total;
 197
 198         if (ctx == NULL)
 199                 return (-1.0);
 200
 201         if (ctx->req_rcvd < 1)
 202                 return (-0.0);
 203         else if (ctx->req_rcvd < 2)
 204                 return (0.0);
 205
 206         num_total = (double) ctx->req_rcvd;
 207         return (sqrt (((num_total * ctx->latency_total_square)
 208                                         - (ctx->latency_total * ctx->latency_total))
 209                                 / (num_total * (num_total - 1.0))));
 210 } /* }}} double context_get_stddev */
 211
 212 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 213 {
 214         if (ctx == NULL)
 215                 return (-1.0);
 216
 217         if (ctx->req_sent < 1)
 218                 return (0.0);
 219
 220         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 221                         / ((double) ctx->req_sent));
 222 } /* }}} double context_get_packet_loss */
 223
 224 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 225 {
 226         pingobj_iter_t *iter;
 227         int index;
 228
 229         if (ping == NULL)
 230                 return (EINVAL);
 231
 232         index = 0;
 233         for (iter = ping_iterator_get (ping);
 234                         iter != NULL;
 235                         iter = ping_iterator_next (iter))
 236         {
 237                 ping_context_t *context;
 238                 size_t buffer_size;
 239
 240                 context = context_create ();
 241                 context->index = index;
 242
 243                 buffer_size = sizeof (context->host);
 244                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 245
 246                 buffer_size = sizeof (context->addr);
 247                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 248
 249                 ping_iterator_set_context (iter, (void *) context);
 250
 251                 index++;
 252         }
 253
 254         return (0);
 255 } /* }}} int ping_initialize_contexts */
 256
 257 static void usage_exit (const char *name, int status) /* {{{ */
 258 {
 259         fprintf (stderr, "Usage: %s [OPTIONS] "
 260                                 "-f filename | host [host [host ...]]\n"
 261
 262                         "\nAvailable options:\n"
 263                         "  -4|-6        force the use of IPv4 or IPv6\n"
 264                         "  -c count     number of ICMP packets to send\n"
 265                         "  -i interval  interval with which to send ICMP packets\n"
 266                         "  -t ttl       time to live for each ICMP packet\n"
 267                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 268                         "               Use \"-Q help\" for a list of valid options.\n"
 269                         "  -I srcaddr   source address\n"
 270                         "  -D device    outgoing interface name\n"
 271                         "  -f filename  filename to read hosts from\n"
 272
 273                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 274                         "by Florian octo Forster <octo@verplant.org>\n"
 275                         "for contributions see `AUTHORS'\n",
 276                         name);
 277         exit (status);
 278 } /* }}} void usage_exit */
 279
 280 __attribute__((noreturn))
 281 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 282 {
 283         if (arg != 0)
 284                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 285
 286         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 287                         "\n"
 288                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 289                         "\n"
 290                         "    be                     Best Effort (BE, default PHB).\n"
 291                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 292                         "                           (low delay, low loss, low jitter)\n"
 293                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 294                         "                           (capacity-admitted traffic)\n"
 295                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 296                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 297                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 298                         "                           For example: \"cs1\" (priority traffic)\n"
 299                         "\n"
 300                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 301                         "\n"
 302                         "    lowdelay     (%#04x)    minimize delay\n"
 303                         "    throughput   (%#04x)    maximize throughput\n"
 304                         "    reliability  (%#04x)    maximize reliability\n"
 305                         "    mincost      (%#04x)    minimize monetary cost\n"
 306                         "\n"
 307                         "  Specify manually\n"
 308                         "\n"
 309                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 310                         "       0 -  255            Decimal numeric specification.\n"
 311                         "\n",
 312                         (unsigned int) IPTOS_LOWDELAY,
 313                         (unsigned int) IPTOS_THROUGHPUT,
 314                         (unsigned int) IPTOS_RELIABILITY,
 315                         (unsigned int) IPTOS_MINCOST);
 316
 317         exit (status);
 318 } /* }}} void usage_qos_exit */
 319
 320 static int set_opt_send_qos (const char *opt) /* {{{ */
 321 {
 322         if (opt == NULL)
 323                 return (EINVAL);
 324
 325         if (strcasecmp ("help", opt) == 0)
 326                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 327         /* DiffServ (RFC 2474): */
 328         /* - Best effort (BE) */
 329         else if (strcasecmp ("be", opt) == 0)
 330                 opt_send_qos = 0;
 331         /* - Expedited Forwarding (EF, RFC 3246) */
 332         else if (strcasecmp ("ef", opt) == 0)
 333                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 334         /* - Voice Admit (VA, RFC 5865) */
 335         else if (strcasecmp ("va", opt) == 0)
 336                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 337         /* - Assured Forwarding (AF, RFC 2597) */
 338         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 339                         && (strlen (opt) == 4))
 340         {
 341                 uint8_t dscp;
 342                 uint8_t class = 0;
 343                 uint8_t prec = 0;
 344
 345                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 346                 if (opt[2] == '1')
 347                         class = 1;
 348                 else if (opt[2] == '2')
 349                         class = 2;
 350                 else if (opt[2] == '3')
 351                         class = 3;
 352                 else if (opt[2] == '4')
 353                         class = 4;
 354                 else
 355                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 356
 357                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 358                 if (opt[3] == '1')
 359                         prec = 1;
 360                 else if (opt[3] == '2')
 361                         prec = 2;
 362                 else if (opt[3] == '3')
 363                         prec = 3;
 364                 else
 365                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 366
 367                 dscp = (8 * class) + (2 * prec);
 368                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 369                 opt_send_qos = dscp << 2;
 370         }
 371         /* - Class Selector (CS) */
 372         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 373                         && (strlen (opt) == 3))
 374         {
 375                 uint8_t class;
 376
 377                 if ((opt[2] < '0') || (opt[2] > '7'))
 378                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 379
 380                 /* Not exactly legal by the C standard, but I don't know of any
 381                  * system not supporting this hack. */
 382                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 383                 opt_send_qos = class << 5;
 384         }
 385         /* Type of Service (RFC 1349) */
 386         else if (strcasecmp ("lowdelay", opt) == 0)
 387                 opt_send_qos = IPTOS_LOWDELAY;
 388         else if (strcasecmp ("throughput", opt) == 0)
 389                 opt_send_qos = IPTOS_THROUGHPUT;
 390         else if (strcasecmp ("reliability", opt) == 0)
 391                 opt_send_qos = IPTOS_RELIABILITY;
 392         else if (strcasecmp ("mincost", opt) == 0)
 393                 opt_send_qos = IPTOS_MINCOST;
 394         /* Numeric value */
 395         else
 396         {
 397                 unsigned long value;
 398                 char *endptr;
 399
 400                 errno = 0;
 401                 endptr = NULL;
 402                 value = strtoul (opt, &endptr, /* base = */ 0);
 403                 if ((errno != 0) || (endptr == opt)
 404                                 || (endptr == NULL) || (*endptr != 0)
 405                                 || (value > 0xff))
 406                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 407
 408                 opt_send_qos = (uint8_t) value;
 409         }
 410
 411         return (0);
 412 } /* }}} int set_opt_send_qos */
 413
 414 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 415 {
 416         uint8_t dscp;
 417         uint8_t ecn;
 418         char *dscp_str;
 419         char *ecn_str;
 420
 421         dscp = qos >> 2;
 422         ecn = qos & 0x03;
 423
 424         switch (dscp)
 425         {
 426                 case 0x00: dscp_str = "be";  break;
 427                 case 0x2e: dscp_str = "ef";  break;
 428                 case 0x2d: dscp_str = "va";  break;
 429                 case 0x0a: dscp_str = "af11"; break;
 430                 case 0x0c: dscp_str = "af12"; break;
 431                 case 0x0e: dscp_str = "af13"; break;
 432                 case 0x12: dscp_str = "af21"; break;
 433                 case 0x14: dscp_str = "af22"; break;
 434                 case 0x16: dscp_str = "af23"; break;
 435                 case 0x1a: dscp_str = "af31"; break;
 436                 case 0x1c: dscp_str = "af32"; break;
 437                 case 0x1e: dscp_str = "af33"; break;
 438                 case 0x22: dscp_str = "af41"; break;
 439                 case 0x24: dscp_str = "af42"; break;
 440                 case 0x26: dscp_str = "af43"; break;
 441                 case 0x08: dscp_str = "cs1";  break;
 442                 case 0x10: dscp_str = "cs2";  break;
 443                 case 0x18: dscp_str = "cs3";  break;
 444                 case 0x20: dscp_str = "cs4";  break;
 445                 case 0x28: dscp_str = "cs5";  break;
 446                 case 0x30: dscp_str = "cs6";  break;
 447                 case 0x38: dscp_str = "cs7";  break;
 448                 default:   dscp_str = NULL;
 449         }
 450
 451         switch (ecn)
 452         {
 453                 case 0x01: ecn_str = ",ecn(1)"; break;
 454                 case 0x02: ecn_str = ",ecn(0)"; break;
 455                 case 0x03: ecn_str = ",ce"; break;
 456                 default:   ecn_str = "";
 457         }
 458
 459         if (dscp_str == NULL)
 460                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 461         else
 462                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 463         buffer[buffer_size - 1] = 0;
 464
 465         return (buffer);
 466 } /* }}} char *format_qos */
 467
 468 static int read_options (int argc, char **argv) /* {{{ */
 469 {
 470         int optchar;
 471
 472         while (1)
 473         {
 474                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 475
 476                 if (optchar == -1)
 477                         break;
 478
 479                 switch (optchar)
 480                 {
 481                         case '4':
 482                         case '6':
 483                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 484                                 break;
 485
 486                         case 'c':
 487                                 {
 488                                         int new_count;
 489                                         new_count = atoi (optarg);
 490                                         if (new_count > 0)
 491                                                 opt_count = new_count;
 492                                         else
 493                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 494                                                                 optarg);
 495                                 }
 496                                 break;
 497
 498                         case 'f':
 499                                 {
 500                                         if (opt_filename != NULL)
 501                                                 free (opt_filename);
 502                                         opt_filename = strdup (optarg);
 503                                 }
 504                                 break;
 505
 506                         case 'i':
 507                                 {
 508                                         double new_interval;
 509                                         new_interval = atof (optarg);
 510                                         if (new_interval < 0.001)
 511                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 512                                                                 optarg);
 513                                         else
 514                                                 opt_interval = new_interval;
 515                                 }
 516                                 break;
 517                         case 'I':
 518                                 {
 519                                         if (opt_srcaddr != NULL)
 520                                                 free (opt_srcaddr);
 521                                         opt_srcaddr = strdup (optarg);
 522                                 }
 523                                 break;
 524
 525                         case 'D':
 526                                 opt_device = optarg;
 527                                 break;
 528
 529                         case 't':
 530                         {
 531                                 int new_send_ttl;
 532                                 new_send_ttl = atoi (optarg);
 533                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 534                                         opt_send_ttl = new_send_ttl;
 535                                 else
 536                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 537                                                         optarg);
 538                                 break;
 539                         }
 540
 541                         case 'Q':
 542                                 set_opt_send_qos (optarg);
 543                                 break;
 544
 545                         case 'h':
 546                                 usage_exit (argv[0], 0);
 547                                 break;
 548                         default:
 549                                 usage_exit (argv[0], 1);
 550                 }
 551         }
 552
 553         return (optind);
 554 } /* }}} read_options */
 555
 556 static void time_normalize (struct timespec *ts) /* {{{ */
 557 {
 558         while (ts->tv_nsec < 0)
 559         {
 560                 if (ts->tv_sec == 0)
 561                 {
 562                         ts->tv_nsec = 0;
 563                         return;
 564                 }
 565
 566                 ts->tv_sec  -= 1;
 567                 ts->tv_nsec += 1000000000;
 568         }
 569
 570         while (ts->tv_nsec >= 1000000000)
 571         {
 572                 ts->tv_sec  += 1;
 573                 ts->tv_nsec -= 1000000000;
 574         }
 575 } /* }}} void time_normalize */
 576
 577 static void time_calc (struct timespec *ts_dest, /* {{{ */
 578                 const struct timespec *ts_int,
 579                 const struct timeval  *tv_begin,
 580                 const struct timeval  *tv_end)
 581 {
 582         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 583         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 584         time_normalize (ts_dest);
 585
 586         /* Assure that `(begin + interval) > end'.
 587          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 588          * which may be `unsigned. *sigh* */
 589         if ((tv_end->tv_sec > ts_dest->tv_sec)
 590                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 591                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 592         {
 593                 ts_dest->tv_sec  = 0;
 594                 ts_dest->tv_nsec = 0;
 595                 return;
 596         }
 597
 598         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 599         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 600         time_normalize (ts_dest);
 601 } /* }}} void time_calc */
 602
 603 #if USE_NCURSES
 604 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 605 {
 606         if ((ctx == NULL) || (ctx->window == NULL))
 607                 return (EINVAL);
 608
 609         werase (ctx->window);
 610
 611         box (ctx->window, 0, 0);
 612         wattron (ctx->window, A_BOLD);
 613         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 614                         " %s ", ctx->host);
 615         wattroff (ctx->window, A_BOLD);
 616         wprintw (ctx->window, "ping statistics ");
 617         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 618                         "%i packets transmitted, %i received, %.2f%% packet "
 619                         "loss, time %.1fms",
 620                         ctx->req_sent, ctx->req_rcvd,
 621                         context_get_packet_loss (ctx),
 622                         ctx->latency_total);
 623         if (ctx->req_rcvd != 0)
 624         {
 625                 double average;
 626                 double deviation;
 627
 628                 average = context_get_average (ctx);
 629                 deviation = context_get_stddev (ctx);
 630
 631                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 632                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 633                                 ctx->latency_min,
 634                                 average,
 635                                 ctx->latency_max,
 636                                 deviation);
 637         }
 638
 639         wrefresh (ctx->window);
 640
 641         return (0);
 642 } /* }}} int update_stats_from_context */
 643
 644 static int on_resize (pingobj_t *ping) /* {{{ */
 645 {
 646         pingobj_iter_t *iter;
 647         int width = 0;
 648         int height = 0;
 649         int main_win_height;
 650
 651         getmaxyx (stdscr, height, width);
 652         if ((height < 1) || (width < 1))
 653                 return (EINVAL);
 654
 655         main_win_height = height - (4 * host_num);
 656         wresize (main_win, main_win_height, /* width = */ width);
 657         /* Allow scrolling */
 658         scrollok (main_win, TRUE);
 659         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 660         /* Allow hardware accelerated scrolling. */
 661         idlok (main_win, TRUE);
 662         wrefresh (main_win);
 663
 664         for (iter = ping_iterator_get (ping);
 665                         iter != NULL;
 666                         iter = ping_iterator_next (iter))
 667         {
 668                 ping_context_t *context;
 669
 670                 context = ping_iterator_get_context (iter);
 671                 if (context == NULL)
 672                         continue;
 673
 674                 if (context->window != NULL)
 675                 {
 676                         delwin (context->window);
 677                         context->window = NULL;
 678                 }
 679                 context->window = newwin (/* height = */ 4,
 680                                 /* width = */ width,
 681                                 /* y = */ main_win_height + (4 * context->index),
 682                                 /* x = */ 0);
 683         }
 684
 685         return (0);
 686 } /* }}} */
 687
 688 static int check_resize (pingobj_t *ping) /* {{{ */
 689 {
 690         int need_resize = 0;
 691
 692         while (42)
 693         {
 694                 int key = wgetch (stdscr);
 695                 if (key == ERR)
 696                         break;
 697                 else if (key == KEY_RESIZE)
 698                         need_resize = 1;
 699         }
 700
 701         if (need_resize)
 702                 return (on_resize (ping));
 703         else
 704                 return (0);
 705 } /* }}} int check_resize */
 706
 707 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 708 {
 709         pingobj_iter_t *iter;
 710         int width = 0;
 711         int height = 0;
 712         int main_win_height;
 713
 714         initscr ();
 715         cbreak ();
 716         noecho ();
 717         nodelay (stdscr, TRUE);
 718
 719         getmaxyx (stdscr, height, width);
 720         if ((height < 1) || (width < 1))
 721                 return (EINVAL);
 722
 723         if (has_colors () == TRUE)
 724         {
 725                 start_color ();
 726                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 727                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 728                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 729         }
 730
 731         main_win_height = height - (4 * host_num);
 732         main_win = newwin (/* height = */ main_win_height,
 733                         /* width = */ width,
 734                         /* y = */ 0, /* x = */ 0);
 735         /* Allow scrolling */
 736         scrollok (main_win, TRUE);
 737         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 738         /* Allow hardware accelerated scrolling. */
 739         idlok (main_win, TRUE);
 740         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 741         wrefresh (main_win);
 742
 743         for (iter = ping_iterator_get (ping);
 744                         iter != NULL;
 745                         iter = ping_iterator_next (iter))
 746         {
 747                 ping_context_t *context;
 748
 749                 context = ping_iterator_get_context (iter);
 750                 if (context == NULL)
 751                         continue;
 752
 753                 if (context->window != NULL)
 754                 {
 755                         delwin (context->window);
 756                         context->window = NULL;
 757                 }
 758                 context->window = newwin (/* height = */ 4,
 759                                 /* width = */ width,
 760                                 /* y = */ main_win_height + (4 * context->index),
 761                                 /* x = */ 0);
 762         }
 763
 764
 765         /* Don't know what good this does exactly, but without this code
 766          * "check_resize" will be called right after startup and *somehow*
 767          * this leads to display errors. If we purge all initial characters
 768          * here, the problem goes away. "wgetch" is non-blocking due to
 769          * "nodelay" (see above). */
 770         while (wgetch (stdscr) != ERR)
 771         {
 772                 /* eat up characters */;
 773         }
 774
 775         return (0);
 776 } /* }}} int pre_loop_hook */
 777
 778 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 779 {
 780         return (check_resize (ping));
 781 } /* }}} int pre_sleep_hook */
 782
 783 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 784 {
 785         return (check_resize (ping));
 786 } /* }}} int pre_sleep_hook */
 787 #else /* if !USE_NCURSES */
 788 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 789 {
 790         pingobj_iter_t *iter;
 791
 792         for (iter = ping_iterator_get (ping);
 793                         iter != NULL;
 794                         iter = ping_iterator_next (iter))
 795         {
 796                 ping_context_t *ctx;
 797                 size_t buffer_size;
 798
 799                 ctx = ping_iterator_get_context (iter);
 800                 if (ctx == NULL)
 801                         continue;
 802
 803                 buffer_size = 0;
 804                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 805
 806                 printf ("PING %s (%s) %zu bytes of data.\n",
 807                                 ctx->host, ctx->addr, buffer_size);
 808         }
 809
 810         return (0);
 811 } /* }}} int pre_loop_hook */
 812
 813 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 814 {
 815         fflush (stdout);
 816
 817         return (0);
 818 } /* }}} int pre_sleep_hook */
 819
 820 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 821 {
 822         return (0);
 823 } /* }}} int post_sleep_hook */
 824 #endif
 825
 826 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 827                 __attribute__((unused)) int index)
 828 {
 829         double          latency;
 830         unsigned int    sequence;
 831         int             recv_ttl;
 832         uint8_t         recv_qos;
 833         char            recv_qos_str[16];
 834         size_t          buffer_len;
 835         size_t          data_len;
 836         ping_context_t *context;
 837
 838         latency = -1.0;
 839         buffer_len = sizeof (latency);
 840         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 841                         &latency, &buffer_len);
 842
 843         sequence = 0;
 844         buffer_len = sizeof (sequence);
 845         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 846                         &sequence, &buffer_len);
 847
 848         recv_ttl = -1;
 849         buffer_len = sizeof (recv_ttl);
 850         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 851                         &recv_ttl, &buffer_len);
 852
 853         recv_qos = 0;
 854         buffer_len = sizeof (recv_qos);
 855         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 856                         &recv_qos, &buffer_len);
 857
 858         data_len = 0;
 859         ping_iterator_get_info (iter, PING_INFO_DATA,
 860                         NULL, &data_len);
 861
 862         context = (ping_context_t *) ping_iterator_get_context (iter);
 863
 864 #if USE_NCURSES
 865 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 866 #else
 867 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 868 #endif
 869
 870         context->req_sent++;
 871         if (latency > 0.0)
 872         {
 873                 context->req_rcvd++;
 874                 context->latency_total += latency;
 875                 context->latency_total_square += (latency * latency);
 876
 877                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 878                         context->latency_max = latency;
 879                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 880                         context->latency_min = latency;
 881
 882 #if USE_NCURSES
 883                 if (has_colors () == TRUE)
 884                 {
 885                         int color = OPING_GREEN;
 886                         double average = context_get_average (context);
 887                         double stddev = context_get_stddev (context);
 888
 889                         if ((latency < (average - (2 * stddev)))
 890                                         || (latency > (average + (2 * stddev))))
 891                                 color = OPING_RED;
 892                         else if ((latency < (average - stddev))
 893                                         || (latency > (average + stddev)))
 894                                 color = OPING_YELLOW;
 895
 896                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 897                                         data_len, context->host, context->addr,
 898                                         sequence, recv_ttl,
 899                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 900                         if ((recv_qos != 0) || (opt_send_qos != 0))
 901                         {
 902                                 HOST_PRINTF ("qos=%s ",
 903                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 904                         }
 905                         HOST_PRINTF ("time=");
 906                         wattron (main_win, COLOR_PAIR(color));
 907                         HOST_PRINTF ("%.2f", latency);
 908                         wattroff (main_win, COLOR_PAIR(color));
 909                         HOST_PRINTF (" ms\n");
 910                 }
 911                 else
 912                 {
 913 #endif
 914                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
 915                                 data_len,
 916                                 context->host, context->addr,
 917                                 sequence, recv_ttl);
 918                 if ((recv_qos != 0) || (opt_send_qos != 0))
 919                 {
 920                         HOST_PRINTF ("qos=%s ",
 921                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
 922                 }
 923                 HOST_PRINTF ("time=%.2f ms\n", latency);
 924 #if USE_NCURSES
 925                 }
 926 #endif
 927         }
 928         else
 929         {
 930 #if USE_NCURSES
 931                 if (has_colors () == TRUE)
 932                 {
 933                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 934                                         context->host, context->addr,
 935                                         sequence);
 936                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 937                         HOST_PRINTF ("timeout");
 938                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 939                         HOST_PRINTF ("\n");
 940                 }
 941                 else
 942                 {
 943 #endif
 944                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 945                                 context->host, context->addr,
 946                                 sequence);
 947 #if USE_NCURSES
 948                 }
 949 #endif
 950         }
 951
 952 #if USE_NCURSES
 953         update_stats_from_context (context);
 954         wrefresh (main_win);
 955 #endif
 956 } /* }}} void update_host_hook */
 957
 958 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 959 {
 960         pingobj_iter_t *iter;
 961
 962 #if USE_NCURSES
 963         endwin ();
 964 #endif
 965
 966         for (iter = ping_iterator_get (ping);
 967                         iter != NULL;
 968                         iter = ping_iterator_next (iter))
 969         {
 970                 ping_context_t *context;
 971
 972                 context = ping_iterator_get_context (iter);
 973
 974                 printf ("\n--- %s ping statistics ---\n"
 975                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 976                                 context->host, context->req_sent, context->req_rcvd,
 977                                 context_get_packet_loss (context),
 978                                 context->latency_total);
 979
 980                 if (context->req_rcvd != 0)
 981                 {
 982                         double average;
 983                         double deviation;
 984
 985                         average = context_get_average (context);
 986                         deviation = context_get_stddev (context);
 987
 988                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 989                                         context->latency_min,
 990                                         average,
 991                                         context->latency_max,
 992                                         deviation);
 993                 }
 994
 995                 ping_iterator_set_context (iter, NULL);
 996                 context_destroy (context);
 997         }
 998
 999         return (0);
1000 } /* }}} int post_loop_hook */
1001
1002 int main (int argc, char **argv) /* {{{ */
1003 {
1004         pingobj_t      *ping;
1005         pingobj_iter_t *iter;
1006
1007         struct sigaction sigint_action;
1008
1009         struct timeval  tv_begin;
1010         struct timeval  tv_end;
1011         struct timespec ts_wait;
1012         struct timespec ts_int;
1013
1014         int optind;
1015         int i;
1016         int status;
1017 #if _POSIX_SAVED_IDS
1018         uid_t saved_set_uid;
1019
1020         /* Save the old effective user id */
1021         saved_set_uid = geteuid ();
1022         /* Set the effective user ID to the real user ID without changing the
1023          * saved set-user ID */
1024         status = seteuid (getuid ());
1025         if (status != 0)
1026         {
1027                 fprintf (stderr, "Temporarily dropping privileges "
1028                                 "failed: %s\n", strerror (errno));
1029                 exit (EXIT_FAILURE);
1030         }
1031 #endif
1032
1033         optind = read_options (argc, argv);
1034
1035 #if !_POSIX_SAVED_IDS
1036         /* Cannot temporarily drop privileges -> reject every file but "-". */
1037         if ((opt_filename != NULL)
1038                         && (strcmp ("-", opt_filename) != 0)
1039                         && (getuid () != geteuid ()))
1040         {
1041                 fprintf (stderr, "Your real and effective user IDs don't "
1042                                 "match. Reading from a file (option '-f')\n"
1043                                 "is therefore too risky. You can still read "
1044                                 "from STDIN using '-f -' if you like.\n"
1045                                 "Sorry.\n");
1046                 exit (EXIT_FAILURE);
1047         }
1048 #endif
1049
1050         if ((optind >= argc) && (opt_filename == NULL)) {
1051                 usage_exit (argv[0], 1);
1052         }
1053
1054         if ((ping = ping_construct ()) == NULL)
1055         {
1056                 fprintf (stderr, "ping_construct failed\n");
1057                 return (1);
1058         }
1059
1060         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1061         {
1062                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1063                                 opt_send_ttl, ping_get_error (ping));
1064         }
1065
1066         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1067         {
1068                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1069                                 opt_send_qos, ping_get_error (ping));
1070         }
1071
1072         {
1073                 double temp_sec;
1074                 double temp_nsec;
1075
1076                 temp_nsec = modf (opt_interval, &temp_sec);
1077                 ts_int.tv_sec  = (time_t) temp_sec;
1078                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1079
1080                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1081         }
1082
1083         if (opt_addrfamily != PING_DEF_AF)
1084                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1085
1086         if (opt_srcaddr != NULL)
1087         {
1088                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1089                 {
1090                         fprintf (stderr, "Setting source address failed: %s\n",
1091                                         ping_get_error (ping));
1092                 }
1093         }
1094
1095         if (opt_device != NULL)
1096         {
1097                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1098                 {
1099                         fprintf (stderr, "Setting device failed: %s\n",
1100                                         ping_get_error (ping));
1101                 }
1102         }
1103
1104         if (opt_filename != NULL)
1105         {
1106                 FILE *infile;
1107                 char line[256];
1108                 char host[256];
1109
1110                 if (strcmp (opt_filename, "-") == 0)
1111                         /* Open STDIN */
1112                         infile = fdopen(0, "r");
1113                 else
1114                         infile = fopen(opt_filename, "r");
1115
1116                 if (infile == NULL)
1117                 {
1118                         fprintf (stderr, "Opening %s failed: %s\n",
1119                                         (strcmp (opt_filename, "-") == 0)
1120                                         ? "STDIN" : opt_filename,
1121                                         strerror(errno));
1122                         return (1);
1123                 }
1124
1125 #if _POSIX_SAVED_IDS
1126                 /* Regain privileges */
1127                 status = seteuid (saved_set_uid);
1128                 if (status != 0)
1129                 {
1130                         fprintf (stderr, "Temporarily re-gaining privileges "
1131                                         "failed: %s\n", strerror (errno));
1132                         exit (EXIT_FAILURE);
1133                 }
1134 #endif
1135
1136                 while (fgets(line, sizeof(line), infile))
1137                 {
1138                         /* Strip whitespace */
1139                         if (sscanf(line, "%s", host) != 1)
1140                                 continue;
1141
1142                         if ((host[0] == 0) || (host[0] == '#'))
1143                                 continue;
1144
1145                         if (ping_host_add(ping, host) < 0)
1146                         {
1147                                 const char *errmsg = ping_get_error (ping);
1148
1149                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1150                                 continue;
1151                         }
1152                         else
1153                         {
1154                                 host_num++;
1155                         }
1156                 }
1157
1158 #if _POSIX_SAVED_IDS
1159                 /* Drop privileges */
1160                 status = seteuid (getuid ());
1161                 if (status != 0)
1162                 {
1163                         fprintf (stderr, "Temporarily dropping privileges "
1164                                         "failed: %s\n", strerror (errno));
1165                         exit (EXIT_FAILURE);
1166                 }
1167 #endif
1168
1169                 fclose(infile);
1170         }
1171
1172 #if _POSIX_SAVED_IDS
1173         /* Regain privileges */
1174         status = seteuid (saved_set_uid);
1175         if (status != 0)
1176         {
1177                 fprintf (stderr, "Temporarily re-gaining privileges "
1178                                 "failed: %s\n", strerror (errno));
1179                 exit (EXIT_FAILURE);
1180         }
1181 #endif
1182
1183         for (i = optind; i < argc; i++)
1184         {
1185                 if (ping_host_add (ping, argv[i]) < 0)
1186                 {
1187                         const char *errmsg = ping_get_error (ping);
1188
1189                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1190                         continue;
1191                 }
1192                 else
1193                 {
1194                         host_num++;
1195                 }
1196         }
1197
1198         /* Permanently drop root privileges if we're setuid-root. */
1199         status = setuid (getuid ());
1200         if (status != 0)
1201         {
1202                 fprintf (stderr, "Dropping privileges failed: %s\n",
1203                                 strerror (errno));
1204                 exit (EXIT_FAILURE);
1205         }
1206
1207 #if _POSIX_SAVED_IDS
1208         saved_set_uid = (uid_t) -1;
1209 #endif
1210
1211         ping_initialize_contexts (ping);
1212
1213         if (i == 0)
1214                 return (1);
1215
1216         memset (&sigint_action, '\0', sizeof (sigint_action));
1217         sigint_action.sa_handler = sigint_handler;
1218         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1219         {
1220                 perror ("sigaction");
1221                 return (1);
1222         }
1223
1224         pre_loop_hook (ping);
1225
1226         while (opt_count != 0)
1227         {
1228                 int index;
1229                 int status;
1230
1231                 if (gettimeofday (&tv_begin, NULL) < 0)
1232                 {
1233                         perror ("gettimeofday");
1234                         return (1);
1235                 }
1236
1237                 status = ping_send (ping);
1238                 if (status == -EINTR)
1239                 {
1240                         continue;
1241                 }
1242                 else if (status < 0)
1243                 {
1244                         fprintf (stderr, "ping_send failed: %s\n",
1245                                         ping_get_error (ping));
1246                         return (1);
1247                 }
1248
1249                 index = 0;
1250                 for (iter = ping_iterator_get (ping);
1251                                 iter != NULL;
1252                                 iter = ping_iterator_next (iter))
1253                 {
1254                         update_host_hook (iter, index);
1255                         index++;
1256                 }
1257
1258                 pre_sleep_hook (ping);
1259
1260                 /* Don't sleep in the last iteration */
1261                 if (opt_count == 1)
1262                         break;
1263
1264                 if (gettimeofday (&tv_end, NULL) < 0)
1265                 {
1266                         perror ("gettimeofday");
1267                         return (1);
1268                 }
1269
1270                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1271
1272                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1273                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1274                 {
1275                         if (errno == EINTR)
1276                         {
1277                                 continue;
1278                         }
1279                         else
1280                         {
1281                                 perror ("nanosleep");
1282                                 break;
1283                         }
1284                 }
1285
1286                 post_sleep_hook (ping);
1287
1288                 if (opt_count > 0)
1289                         opt_count--;
1290         } /* while (opt_count != 0) */
1291
1292         post_loop_hook (ping);
1293
1294         ping_destroy (ping);
1295
1296         return (0);
1297 } /* }}} int main */
1298
1299 /* vim: set fdm=marker : */