1 /**
2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006 Florian octo Forster <octo at verplant.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; only version 2 of the License is
8 * applicable.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
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 <errno.h>
29 # include <assert.h>
30 #else
31 # error "You don't have the standard C99 header files installed"
32 #endif /* STDC_HEADERS */
34 #if HAVE_MATH_H
35 # include <math.h>
36 #endif
38 #if TIME_WITH_SYS_TIME
39 # include <sys/time.h>
40 # include <time.h>
41 #else
42 # if HAVE_SYS_TIME_H
43 # include <sys/time.h>
44 # else
45 # include <time.h>
46 # endif
47 #endif
49 #if HAVE_NETDB_H
50 # include <netdb.h> /* NI_MAXHOST */
51 #endif
53 #if HAVE_SIGNAL_H
54 # include <signal.h>
55 #endif
57 #include "oping.h"
59 typedef struct ping_context
60 {
61 char host[NI_MAXHOST];
62 char addr[NI_MAXHOST];
64 int req_sent;
65 int req_rcvd;
67 double latency_min;
68 double latency_max;
69 double latency_total;
70 double latency_total_square;
71 } ping_context_t;
73 static double opt_interval = 1.0;
74 static int opt_addrfamily = PING_DEF_AF;
75 static char *opt_srcaddr = NULL;
76 static char *opt_device = NULL;
77 static char *opt_filename = NULL;
78 static int opt_count = -1;
79 static int opt_send_ttl = 64;
81 static void sigint_handler (int signal)
82 {
83 /* Make compiler happy */
84 signal = 0;
85 /* Exit the loop */
86 opt_count = 0;
87 }
89 static ping_context_t *context_create (void)
90 {
91 ping_context_t *ret;
93 if ((ret = malloc (sizeof (ping_context_t))) == NULL)
94 return (NULL);
96 memset (ret, '\0', sizeof (ping_context_t));
98 ret->latency_min = -1.0;
99 ret->latency_max = -1.0;
100 ret->latency_total = 0.0;
101 ret->latency_total_square = 0.0;
103 return (ret);
104 }
106 static void context_destroy (ping_context_t *context)
107 {
108 free (context);
109 }
111 static void usage_exit (const char *name, int status)
112 {
113 int name_length;
115 name_length = (int) strlen (name);
117 fprintf (stderr, "Usage: %s [OPTIONS] "
118 "-f filename | host [host [host ...]]\n"
120 "\nAvailable options:\n"
121 " -4|-6 force the use of IPv4 or IPv6\n"
122 " -c count number of ICMP packets to send\n"
123 " -i interval interval with which to send ICMP packets\n"
124 " -t ttl time to live for each ICMP packet\n"
125 " -I srcaddr source address\n"
126 " -D device outgoing interface name\n"
127 " -f filename filename to read hosts from\n"
129 "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
130 "by Florian octo Forster <octo@verplant.org>\n"
131 "for contributions see `AUTHORS'\n",
132 name);
133 exit (status);
134 }
136 static int read_options (int argc, char **argv)
137 {
138 int optchar;
140 while (1)
141 {
142 optchar = getopt (argc, argv, "46c:hi:I:t:f:D:");
144 if (optchar == -1)
145 break;
147 switch (optchar)
148 {
149 case '4':
150 case '6':
151 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
152 break;
154 case 'c':
155 {
156 int new_count;
157 new_count = atoi (optarg);
158 if (new_count > 0)
159 opt_count = new_count;
160 else
161 fprintf(stderr, "Ignoring invalid count: %s\n",
162 optarg);
163 }
164 break;
166 case 'f':
167 {
168 if (opt_filename != NULL)
169 free (opt_filename);
170 opt_filename = strdup (optarg);
171 }
172 break;
174 case 'i':
175 {
176 double new_interval;
177 new_interval = atof (optarg);
178 if (new_interval < 0.001)
179 fprintf (stderr, "Ignoring invalid interval: %s\n",
180 optarg);
181 else
182 opt_interval = new_interval;
183 }
184 break;
185 case 'I':
186 {
187 if (opt_srcaddr != NULL)
188 free (opt_srcaddr);
189 opt_srcaddr = strdup (optarg);
190 }
191 break;
193 case 'D':
194 opt_device = optarg;
195 break;
197 case 't':
198 {
199 int new_send_ttl;
200 new_send_ttl = atoi (optarg);
201 if ((new_send_ttl > 0) && (new_send_ttl < 256))
202 opt_send_ttl = new_send_ttl;
203 else
204 fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
205 optarg);
206 break;
207 }
209 case 'h':
210 usage_exit (argv[0], 0);
211 break;
212 default:
213 usage_exit (argv[0], 1);
214 }
215 }
217 return (optind);
218 }
220 static void print_host (pingobj_iter_t *iter)
221 {
222 double latency;
223 unsigned int sequence;
224 int recv_ttl;
225 size_t buffer_len;
226 size_t data_len;
227 ping_context_t *context;
229 latency = -1.0;
230 buffer_len = sizeof (latency);
231 ping_iterator_get_info (iter, PING_INFO_LATENCY,
232 &latency, &buffer_len);
234 sequence = 0;
235 buffer_len = sizeof (sequence);
236 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
237 &sequence, &buffer_len);
239 recv_ttl = -1;
240 buffer_len = sizeof (recv_ttl);
241 ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
242 &recv_ttl, &buffer_len);
244 data_len = 0;
245 ping_iterator_get_info (iter, PING_INFO_DATA,
246 NULL, &data_len);
248 context = (ping_context_t *) ping_iterator_get_context (iter);
250 context->req_sent++;
251 if (latency > 0.0)
252 {
253 context->req_rcvd++;
254 context->latency_total += latency;
255 context->latency_total_square += (latency * latency);
257 if ((context->latency_max < 0.0) || (context->latency_max < latency))
258 context->latency_max = latency;
259 if ((context->latency_min < 0.0) || (context->latency_min > latency))
260 context->latency_min = latency;
262 printf ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i time=%.2f ms\n",
263 data_len,
264 context->host, context->addr,
265 sequence, recv_ttl, latency);
266 }
267 else
268 {
269 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
270 context->host, context->addr,
271 sequence);
272 }
273 }
275 static void time_normalize (struct timespec *ts)
276 {
277 while (ts->tv_nsec < 0)
278 {
279 if (ts->tv_sec == 0)
280 {
281 ts->tv_nsec = 0;
282 return;
283 }
285 ts->tv_sec -= 1;
286 ts->tv_nsec += 1000000000;
287 }
289 while (ts->tv_nsec >= 1000000000)
290 {
291 ts->tv_sec += 1;
292 ts->tv_nsec -= 1000000000;
293 }
294 }
296 static void time_calc (struct timespec *ts_dest,
297 const struct timespec *ts_int,
298 const struct timeval *tv_begin,
299 const struct timeval *tv_end)
300 {
301 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
302 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
303 time_normalize (ts_dest);
305 /* Assure that `(begin + interval) > end'.
306 * This may seem overly complicated, but `tv_sec' is of type `time_t'
307 * which may be `unsigned. *sigh* */
308 if ((tv_end->tv_sec > ts_dest->tv_sec)
309 || ((tv_end->tv_sec == ts_dest->tv_sec)
310 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
311 {
312 ts_dest->tv_sec = 0;
313 ts_dest->tv_nsec = 0;
314 return;
315 }
317 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
318 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
319 time_normalize (ts_dest);
320 }
322 int main (int argc, char **argv)
323 {
324 pingobj_t *ping;
325 pingobj_iter_t *iter;
327 struct sigaction sigint_action;
329 struct timeval tv_begin;
330 struct timeval tv_end;
331 struct timespec ts_wait;
332 struct timespec ts_int;
334 int optind;
335 int i;
337 optind = read_options (argc, argv);
339 if ((optind >= argc) && (opt_filename == NULL)) {
340 usage_exit (argv[0], 1);
341 }
343 if (geteuid () != 0)
344 {
345 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
346 return (1);
347 }
349 if ((ping = ping_construct ()) == NULL)
350 {
351 fprintf (stderr, "ping_construct failed\n");
352 return (1);
353 }
355 if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
356 {
357 fprintf (stderr, "Setting TTL to %i failed: %s\n",
358 opt_send_ttl, ping_get_error (ping));
359 }
361 {
362 double temp_sec;
363 double temp_nsec;
365 temp_nsec = modf (opt_interval, &temp_sec);
366 ts_int.tv_sec = (time_t) temp_sec;
367 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
369 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
370 }
372 if (opt_addrfamily != PING_DEF_AF)
373 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
375 if (opt_srcaddr != NULL)
376 {
377 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
378 {
379 fprintf (stderr, "Setting source address failed: %s\n",
380 ping_get_error (ping));
381 }
382 }
384 if (opt_device != NULL)
385 {
386 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
387 {
388 fprintf (stderr, "Setting device failed: %s\n",
389 ping_get_error (ping));
390 }
391 }
393 if (opt_filename != NULL)
394 {
395 FILE *infile;
396 char line[256];
397 char host[256];
399 if (strcmp (opt_filename, "-") == 0)
400 /* Open STDIN */
401 infile = fdopen(0, "r");
402 else
403 infile = fopen(opt_filename, "r");
405 if (infile == NULL)
406 {
407 fprintf (stderr, "Opening %s failed: %s\n",
408 (strcmp (opt_filename, "-") == 0)
409 ? "STDIN" : opt_filename,
410 strerror(errno));
411 return (1);
412 }
414 while (fgets(line, sizeof(line), infile))
415 {
416 /* Strip whitespace */
417 if (sscanf(line, "%s", host) != 1)
418 continue;
420 if ((host[0] == 0) || (host[0] == '#'))
421 continue;
423 if (ping_host_add(ping, host) < 0)
424 {
425 const char *errmsg = ping_get_error (ping);
427 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
428 continue;
429 }
430 }
432 fclose(infile);
433 }
435 for (i = optind; i < argc; i++)
436 {
437 if (ping_host_add (ping, argv[i]) < 0)
438 {
439 const char *errmsg = ping_get_error (ping);
441 fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
442 continue;
443 }
444 }
446 /* Drop root privileges if we're setuid-root. */
447 setuid (getuid ());
449 i = 0;
450 for (iter = ping_iterator_get (ping);
451 iter != NULL;
452 iter = ping_iterator_next (iter))
453 {
454 ping_context_t *context;
455 size_t buffer_size;
457 context = context_create ();
459 buffer_size = sizeof (context->host);
460 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
462 buffer_size = sizeof (context->addr);
463 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
465 buffer_size = 0;
466 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
468 printf ("PING %s (%s) %zu bytes of data.\n",
469 context->host, context->addr, buffer_size);
471 ping_iterator_set_context (iter, (void *) context);
473 i++;
474 }
476 if (i == 0)
477 return (1);
479 memset (&sigint_action, '\0', sizeof (sigint_action));
480 sigint_action.sa_handler = sigint_handler;
481 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
482 {
483 perror ("sigaction");
484 return (1);
485 }
487 while (opt_count != 0)
488 {
489 int status;
491 if (gettimeofday (&tv_begin, NULL) < 0)
492 {
493 perror ("gettimeofday");
494 return (1);
495 }
497 if (ping_send (ping) < 0)
498 {
499 fprintf (stderr, "ping_send failed: %s\n",
500 ping_get_error (ping));
501 return (1);
502 }
504 for (iter = ping_iterator_get (ping);
505 iter != NULL;
506 iter = ping_iterator_next (iter))
507 {
508 print_host (iter);
509 }
510 fflush (stdout);
512 /* Don't sleep in the last iteration */
513 if (opt_count == 1)
514 break;
516 if (gettimeofday (&tv_end, NULL) < 0)
517 {
518 perror ("gettimeofday");
519 return (1);
520 }
522 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
524 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
525 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
526 {
527 if (errno != EINTR)
528 {
529 perror ("nanosleep");
530 break;
531 }
532 else if (opt_count == 0)
533 {
534 /* sigint */
535 break;
536 }
537 }
539 if (opt_count > 0)
540 opt_count--;
541 } /* while (opt_count != 0) */
543 for (iter = ping_iterator_get (ping);
544 iter != NULL;
545 iter = ping_iterator_next (iter))
546 {
547 ping_context_t *context;
549 context = ping_iterator_get_context (iter);
551 printf ("\n--- %s ping statistics ---\n"
552 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
553 context->host, context->req_sent, context->req_rcvd,
554 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
555 context->latency_total);
557 if (context->req_rcvd != 0)
558 {
559 double num_total;
560 double average;
561 double deviation;
563 num_total = (double) context->req_rcvd;
565 average = context->latency_total / num_total;
566 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
567 / (num_total * (num_total - 1.0)));
569 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
570 context->latency_min,
571 average,
572 context->latency_max,
573 deviation);
574 }
576 ping_iterator_set_context (iter, NULL);
577 context_destroy (context);
578 }
580 ping_destroy (ping);
582 return (0);
583 }