Code

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