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_filename = NULL;
77 static int opt_count = -1;
78 static int opt_send_ttl = 64;
80 static void sigint_handler (int signal)
81 {
82 /* Make compiler happy */
83 signal = 0;
84 /* Exit the loop */
85 opt_count = 0;
86 }
88 static ping_context_t *context_create (void)
89 {
90 ping_context_t *ret;
92 if ((ret = malloc (sizeof (ping_context_t))) == NULL)
93 return (NULL);
95 memset (ret, '\0', sizeof (ping_context_t));
97 ret->latency_min = -1.0;
98 ret->latency_max = -1.0;
99 ret->latency_total = 0.0;
100 ret->latency_total_square = 0.0;
102 return (ret);
103 }
105 static void context_destroy (ping_context_t *context)
106 {
107 free (context);
108 }
110 static void usage_exit (const char *name)
111 {
112 int name_length;
114 name_length = (int) strlen (name);
116 fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval]\n"
117 "%*s[-t ttl] [-I srcaddr]\n"
118 "%*s-f filename | host [host [host ...]]\n",
119 name,
120 8 + name_length, "",
121 8 + name_length, "");
122 exit (1);
123 }
125 static int read_options (int argc, char **argv)
126 {
127 int optchar;
129 while (1)
130 {
131 optchar = getopt (argc, argv, "46c:hi:I:t:f:");
133 if (optchar == -1)
134 break;
136 switch (optchar)
137 {
138 case '4':
139 case '6':
140 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
141 break;
143 case 'c':
144 {
145 int new_count;
146 new_count = atoi (optarg);
147 if (new_count > 0)
148 opt_count = new_count;
149 }
150 break;
152 case 'f':
153 {
154 if (opt_filename != NULL)
155 free (opt_filename);
156 opt_filename = strdup (optarg);
157 }
158 break;
160 case 'i':
161 {
162 double new_interval;
163 new_interval = atof (optarg);
164 if (new_interval < 0.001)
165 fprintf (stderr, "Ignoring invalid interval %g.\n",
166 new_interval);
167 else
168 opt_interval = new_interval;
169 }
170 break;
171 case 'I':
172 {
173 if (opt_srcaddr != NULL)
174 free (opt_srcaddr);
175 opt_srcaddr = strdup (optarg);
176 }
177 break;
179 case 't':
180 {
181 int new_send_ttl;
182 new_send_ttl = atoi (optarg);
183 if ((new_send_ttl > 0) && (new_send_ttl < 256))
184 opt_send_ttl = new_send_ttl;
185 else
186 fprintf (stderr, "Invalid TTL argument: %s\n",
187 optarg);
188 break;
189 }
191 case 'h':
192 default:
193 usage_exit (argv[0]);
194 }
195 }
197 return (optind);
198 }
200 static void print_host (pingobj_iter_t *iter)
201 {
202 double latency;
203 unsigned int sequence;
204 int recv_ttl;
205 size_t buffer_len;
206 size_t data_len;
207 ping_context_t *context;
209 latency = -1.0;
210 buffer_len = sizeof (latency);
211 ping_iterator_get_info (iter, PING_INFO_LATENCY,
212 &latency, &buffer_len);
214 sequence = 0;
215 buffer_len = sizeof (sequence);
216 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
217 &sequence, &buffer_len);
219 recv_ttl = -1;
220 buffer_len = sizeof (recv_ttl);
221 ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
222 &recv_ttl, &buffer_len);
224 data_len = 0;
225 ping_iterator_get_info (iter, PING_INFO_DATA,
226 NULL, &data_len);
228 context = (ping_context_t *) ping_iterator_get_context (iter);
230 context->req_sent++;
231 if (latency > 0.0)
232 {
233 context->req_rcvd++;
234 context->latency_total += latency;
235 context->latency_total_square += (latency * latency);
237 if ((context->latency_max < 0.0) || (context->latency_max < latency))
238 context->latency_max = latency;
239 if ((context->latency_min < 0.0) || (context->latency_min > latency))
240 context->latency_min = latency;
242 printf ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i time=%.2f ms\n",
243 data_len,
244 context->host, context->addr,
245 sequence, recv_ttl, latency);
246 }
247 else
248 {
249 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
250 context->host, context->addr,
251 sequence);
252 }
253 }
255 static void time_normalize (struct timespec *ts)
256 {
257 while (ts->tv_nsec < 0)
258 {
259 if (ts->tv_sec == 0)
260 {
261 ts->tv_nsec = 0;
262 return;
263 }
265 ts->tv_sec -= 1;
266 ts->tv_nsec += 1000000000;
267 }
269 while (ts->tv_nsec >= 1000000000)
270 {
271 ts->tv_sec += 1;
272 ts->tv_nsec -= 1000000000;
273 }
274 }
276 static void time_calc (struct timespec *ts_dest,
277 const struct timespec *ts_int,
278 const struct timeval *tv_begin,
279 const struct timeval *tv_end)
280 {
281 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
282 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
283 time_normalize (ts_dest);
285 /* Assure that `(begin + interval) > end'.
286 * This may seem overly complicated, but `tv_sec' is of type `time_t'
287 * which may be `unsigned. *sigh* */
288 if ((tv_end->tv_sec > ts_dest->tv_sec)
289 || ((tv_end->tv_sec == ts_dest->tv_sec)
290 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
291 {
292 ts_dest->tv_sec = 0;
293 ts_dest->tv_nsec = 0;
294 return;
295 }
297 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
298 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
299 time_normalize (ts_dest);
300 }
302 int main (int argc, char **argv)
303 {
304 pingobj_t *ping;
305 pingobj_iter_t *iter;
307 struct sigaction sigint_action;
309 struct timeval tv_begin;
310 struct timeval tv_end;
311 struct timespec ts_wait;
312 struct timespec ts_int;
314 int optind;
315 int i;
317 optind = read_options (argc, argv);
319 if (optind >= argc && !opt_filename) {
320 usage_exit (argv[0]);
321 }
323 if (geteuid () != 0)
324 {
325 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
326 return (1);
327 }
329 if ((ping = ping_construct ()) == NULL)
330 {
331 fprintf (stderr, "ping_construct failed\n");
332 return (1);
333 }
335 if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
336 {
337 fprintf (stderr, "Setting TTL to %i failed: %s\n",
338 opt_send_ttl, ping_get_error (ping));
339 }
341 {
342 double temp_sec;
343 double temp_nsec;
345 temp_nsec = modf (opt_interval, &temp_sec);
346 ts_int.tv_sec = (time_t) temp_sec;
347 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
349 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
350 }
352 if (opt_addrfamily != PING_DEF_AF)
353 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
355 if (opt_srcaddr != NULL)
356 {
357 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
358 {
359 fprintf (stderr, "Setting source address failed: %s\n",
360 ping_get_error (ping));
361 }
362 }
364 if (opt_filename != NULL)
365 {
366 FILE *infile;
367 char line[256];
368 char host[256];
370 if (strcmp (opt_filename, "-") == 0)
371 /* Open STDIN */
372 infile = fdopen(0, "r");
373 else
374 infile = fopen(opt_filename, "r");
376 if (!infile)
377 {
378 fprintf (stderr, "Couldn't open file for hostnames: %s\n", strerror(errno));
379 return (1);
380 }
382 while (fgets(line, sizeof(line), infile))
383 {
384 if (sscanf(line, "%s", host) != 1)
385 continue;
387 if ((!*host) || (host[0] == '#'))
388 continue;
390 if (ping_host_add(ping, host) < 0)
391 {
392 const char *errmsg = ping_get_error (ping);
394 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
395 continue;
396 }
397 }
399 fclose(infile);
400 }
402 for (i = optind; i < argc; i++)
403 {
404 if (ping_host_add (ping, argv[i]) < 0)
405 {
406 const char *errmsg = ping_get_error (ping);
408 fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
409 continue;
410 }
411 }
413 /* Drop root privileges if we're setuid-root. */
414 setuid (getuid ());
416 i = 0;
417 for (iter = ping_iterator_get (ping);
418 iter != NULL;
419 iter = ping_iterator_next (iter))
420 {
421 ping_context_t *context;
422 size_t buffer_size;
424 context = context_create ();
426 buffer_size = sizeof (context->host);
427 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
429 buffer_size = sizeof (context->addr);
430 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
432 buffer_size = 0;
433 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
435 printf ("PING %s (%s) %zu bytes of data.\n",
436 context->host, context->addr, buffer_size);
438 ping_iterator_set_context (iter, (void *) context);
440 i++;
441 }
443 if (i == 0)
444 return (1);
446 memset (&sigint_action, '\0', sizeof (sigint_action));
447 sigint_action.sa_handler = sigint_handler;
448 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
449 {
450 perror ("sigaction");
451 return (1);
452 }
454 while (opt_count != 0)
455 {
456 int status;
458 if (gettimeofday (&tv_begin, NULL) < 0)
459 {
460 perror ("gettimeofday");
461 return (1);
462 }
464 if (ping_send (ping) < 0)
465 {
466 fprintf (stderr, "ping_send failed: %s\n",
467 ping_get_error (ping));
468 return (1);
469 }
471 for (iter = ping_iterator_get (ping);
472 iter != NULL;
473 iter = ping_iterator_next (iter))
474 {
475 print_host (iter);
476 }
477 fflush (stdout);
479 /* Don't sleep in the last iteration */
480 if (opt_count == 1)
481 break;
483 if (gettimeofday (&tv_end, NULL) < 0)
484 {
485 perror ("gettimeofday");
486 return (1);
487 }
489 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
491 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
492 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
493 {
494 if (errno != EINTR)
495 {
496 perror ("nanosleep");
497 break;
498 }
499 else if (opt_count == 0)
500 {
501 /* sigint */
502 break;
503 }
504 }
506 if (opt_count > 0)
507 opt_count--;
508 } /* while (opt_count != 0) */
510 for (iter = ping_iterator_get (ping);
511 iter != NULL;
512 iter = ping_iterator_next (iter))
513 {
514 ping_context_t *context;
516 context = ping_iterator_get_context (iter);
518 printf ("\n--- %s ping statistics ---\n"
519 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
520 context->host, context->req_sent, context->req_rcvd,
521 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
522 context->latency_total);
524 if (context->req_rcvd != 0)
525 {
526 double num_total;
527 double average;
528 double deviation;
530 num_total = (double) context->req_rcvd;
532 average = context->latency_total / num_total;
533 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
534 / (num_total * (num_total - 1.0)));
536 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
537 context->latency_min,
538 average,
539 context->latency_max,
540 deviation);
541 }
543 ping_iterator_set_context (iter, NULL);
544 context_destroy (context);
545 }
547 ping_destroy (ping);
549 return (0);
550 }