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 int opt_count = -1;
78 static void sigint_handler (int signal)
79 {
80 /* Make compiler happy */
81 signal = 0;
82 /* Exit the loop */
83 opt_count = 0;
84 }
86 static ping_context_t *context_create (void)
87 {
88 ping_context_t *ret;
90 if ((ret = malloc (sizeof (ping_context_t))) == NULL)
91 return (NULL);
93 memset (ret, '\0', sizeof (ping_context_t));
95 ret->latency_min = -1.0;
96 ret->latency_max = -1.0;
97 ret->latency_total = 0.0;
98 ret->latency_total_square = 0.0;
100 return (ret);
101 }
103 static void context_destroy (ping_context_t *context)
104 {
105 free (context);
106 }
108 static void usage_exit (const char *name)
109 {
110 fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval] host [host [host ...]]\n",
111 name);
112 exit (1);
113 }
115 static int read_options (int argc, char **argv)
116 {
117 int optchar;
119 while (1)
120 {
121 optchar = getopt (argc, argv, "46c:hi:I:");
123 if (optchar == -1)
124 break;
126 switch (optchar)
127 {
128 case '4':
129 case '6':
130 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
131 break;
133 case 'c':
134 {
135 int new_count;
136 new_count = atoi (optarg);
137 if (new_count > 0)
138 opt_count = new_count;
139 }
140 break;
142 case 'i':
143 {
144 double new_interval;
145 new_interval = atof (optarg);
146 if (new_interval < 0.001)
147 fprintf (stderr, "Ignoring invalid interval %g.\n",
148 new_interval);
149 else
150 opt_interval = new_interval;
151 }
152 break;
153 case 'I':
154 {
155 if (opt_srcaddr != NULL)
156 free (opt_srcaddr);
157 opt_srcaddr = strdup (optarg);
158 }
159 break;
161 case 'h':
162 default:
163 usage_exit (argv[0]);
164 }
165 }
167 return (optind);
168 }
170 static void print_host (pingobj_iter_t *iter)
171 {
172 double latency;
173 unsigned int sequence;
174 int recv_ttl;
175 size_t buffer_len;
176 size_t data_len;
177 ping_context_t *context;
179 latency = -1.0;
180 buffer_len = sizeof (latency);
181 ping_iterator_get_info (iter, PING_INFO_LATENCY,
182 &latency, &buffer_len);
184 sequence = 0;
185 buffer_len = sizeof (sequence);
186 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
187 &sequence, &buffer_len);
189 recv_ttl = -1;
190 buffer_len = sizeof (recv_ttl);
191 ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
192 &recv_ttl, &buffer_len);
194 data_len = 0;
195 ping_iterator_get_info (iter, PING_INFO_DATA,
196 NULL, &data_len);
198 context = (ping_context_t *) ping_iterator_get_context (iter);
200 context->req_sent++;
201 if (latency > 0.0)
202 {
203 context->req_rcvd++;
204 context->latency_total += latency;
205 context->latency_total_square += (latency * latency);
207 if ((context->latency_max < 0.0) || (context->latency_max < latency))
208 context->latency_max = latency;
209 if ((context->latency_min < 0.0) || (context->latency_min > latency))
210 context->latency_min = latency;
212 printf ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i time=%.2f ms\n",
213 data_len,
214 context->host, context->addr,
215 sequence, recv_ttl, latency);
216 }
217 else
218 {
219 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
220 context->host, context->addr,
221 sequence);
222 }
223 }
225 static void time_normalize (struct timespec *ts)
226 {
227 while (ts->tv_nsec < 0)
228 {
229 if (ts->tv_sec == 0)
230 {
231 ts->tv_nsec = 0;
232 return;
233 }
235 ts->tv_sec -= 1;
236 ts->tv_nsec += 1000000000;
237 }
239 while (ts->tv_nsec >= 1000000000)
240 {
241 ts->tv_sec += 1;
242 ts->tv_nsec -= 1000000000;
243 }
244 }
246 static void time_calc (struct timespec *ts_dest,
247 const struct timespec *ts_int,
248 const struct timeval *tv_begin,
249 const struct timeval *tv_end)
250 {
251 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
252 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
253 time_normalize (ts_dest);
255 /* Assure that `(begin + interval) > end'.
256 * This may seem overly complicated, but `tv_sec' is of type `time_t'
257 * which may be `unsigned. *sigh* */
258 if ((tv_end->tv_sec > ts_dest->tv_sec)
259 || ((tv_end->tv_sec == ts_dest->tv_sec)
260 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
261 {
262 ts_dest->tv_sec = 0;
263 ts_dest->tv_nsec = 0;
264 return;
265 }
267 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
268 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
269 time_normalize (ts_dest);
270 }
272 int main (int argc, char **argv)
273 {
274 pingobj_t *ping;
275 pingobj_iter_t *iter;
277 struct sigaction sigint_action;
279 struct timeval tv_begin;
280 struct timeval tv_end;
281 struct timespec ts_wait;
282 struct timespec ts_int;
284 int optind;
285 int i;
287 optind = read_options (argc, argv);
289 if (optind >= argc)
290 usage_exit (argv[0]);
292 if (geteuid () != 0)
293 {
294 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
295 return (1);
296 }
298 if ((ping = ping_construct ()) == NULL)
299 {
300 fprintf (stderr, "ping_construct failed\n");
301 return (1);
302 }
304 {
305 double temp_sec;
306 double temp_nsec;
308 temp_nsec = modf (opt_interval, &temp_sec);
309 ts_int.tv_sec = (time_t) temp_sec;
310 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
312 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
313 }
315 if (opt_addrfamily != PING_DEF_AF)
316 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
318 if (opt_srcaddr != NULL)
319 {
320 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
321 {
322 fprintf (stderr, "Setting source address failed: %s\n",
323 ping_get_error (ping));
324 }
325 }
327 for (i = optind; i < argc; i++)
328 {
329 if (ping_host_add (ping, argv[i]) < 0)
330 {
331 const char *errmsg = ping_get_error (ping);
333 fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
334 continue;
335 }
336 }
338 /* Drop root privileges if we're setuid-root. */
339 setuid (getuid ());
341 i = 0;
342 for (iter = ping_iterator_get (ping);
343 iter != NULL;
344 iter = ping_iterator_next (iter))
345 {
346 ping_context_t *context;
347 size_t buffer_size;
349 context = context_create ();
351 buffer_size = sizeof (context->host);
352 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
354 buffer_size = sizeof (context->addr);
355 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
357 buffer_size = 0;
358 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
360 printf ("PING %s (%s) %zu bytes of data.\n",
361 context->host, context->addr, buffer_size);
363 ping_iterator_set_context (iter, (void *) context);
365 i++;
366 }
368 if (i == 0)
369 return (1);
371 memset (&sigint_action, '\0', sizeof (sigint_action));
372 sigint_action.sa_handler = sigint_handler;
373 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
374 {
375 perror ("sigaction");
376 return (1);
377 }
379 while (opt_count != 0)
380 {
381 int status;
383 if (gettimeofday (&tv_begin, NULL) < 0)
384 {
385 perror ("gettimeofday");
386 return (1);
387 }
389 if (ping_send (ping) < 0)
390 {
391 fprintf (stderr, "ping_send failed: %s\n",
392 ping_get_error (ping));
393 return (1);
394 }
396 for (iter = ping_iterator_get (ping);
397 iter != NULL;
398 iter = ping_iterator_next (iter))
399 {
400 print_host (iter);
401 }
402 fflush (stdout);
404 /* Don't sleep in the last iteration */
405 if (opt_count == 1)
406 break;
408 if (gettimeofday (&tv_end, NULL) < 0)
409 {
410 perror ("gettimeofday");
411 return (1);
412 }
414 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
416 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
417 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
418 {
419 if (errno != EINTR)
420 {
421 perror ("nanosleep");
422 break;
423 }
424 else if (opt_count == 0)
425 {
426 /* sigint */
427 break;
428 }
429 }
431 if (opt_count > 0)
432 opt_count--;
433 } /* while (opt_count != 0) */
435 for (iter = ping_iterator_get (ping);
436 iter != NULL;
437 iter = ping_iterator_next (iter))
438 {
439 ping_context_t *context;
441 context = ping_iterator_get_context (iter);
443 printf ("\n--- %s ping statistics ---\n"
444 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
445 context->host, context->req_sent, context->req_rcvd,
446 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
447 context->latency_total);
449 if (context->req_rcvd != 0)
450 {
451 double num_total;
452 double average;
453 double deviation;
455 num_total = (double) context->req_rcvd;
457 average = context->latency_total / num_total;
458 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
459 / (num_total * (num_total - 1.0)));
461 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
462 context->latency_min,
463 average,
464 context->latency_max,
465 deviation);
466 }
468 ping_iterator_set_context (iter, NULL);
469 context_destroy (context);
470 }
472 ping_destroy (ping);
474 return (0);
475 }