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 void sigint_handler (int signal)
79 {
80 /* Make compiler happy */
81 signal = 0;
82 /* Exit the loop */
83 opt_count = 0;
84 }
86 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 void context_destroy (ping_context_t *context)
104 {
105 free (context);
106 }
108 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 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 >= 0.2)
147 opt_interval = new_interval;
148 }
149 break;
150 case 'I':
151 {
152 if (opt_srcaddr != NULL)
153 free (opt_srcaddr);
154 opt_srcaddr = strdup (optarg);
155 }
156 break;
158 case 'h':
159 default:
160 usage_exit (argv[0]);
161 }
162 }
164 return (optind);
165 }
167 void print_host (pingobj_iter_t *iter)
168 {
169 double latency;
170 unsigned int sequence;
171 size_t buffer_len;
172 size_t data_len;
173 ping_context_t *context;
175 buffer_len = sizeof (latency);
176 ping_iterator_get_info (iter, PING_INFO_LATENCY,
177 &latency, &buffer_len);
179 buffer_len = sizeof (sequence);
180 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
181 &sequence, &buffer_len);
183 data_len = 0;
184 ping_iterator_get_info (iter, PING_INFO_DATA,
185 NULL, &data_len);
187 context = (ping_context_t *) ping_iterator_get_context (iter);
189 context->req_sent++;
190 if (latency > 0.0)
191 {
192 context->req_rcvd++;
193 context->latency_total += latency;
194 context->latency_total_square += (latency * latency);
196 if ((context->latency_max < 0.0) || (context->latency_max < latency))
197 context->latency_max = latency;
198 if ((context->latency_min < 0.0) || (context->latency_min > latency))
199 context->latency_min = latency;
201 printf ("%zu bytes from %s (%s): icmp_seq=%u time=%.2f ms\n",
202 data_len,
203 context->host, context->addr,
204 sequence, latency);
205 }
206 else
207 {
208 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
209 context->host, context->addr,
210 sequence);
211 }
212 }
214 void time_normalize (struct timespec *ts)
215 {
216 while (ts->tv_nsec < 0)
217 {
218 if (ts->tv_sec == 0)
219 {
220 ts->tv_nsec = 0;
221 return;
222 }
224 ts->tv_sec -= 1;
225 ts->tv_nsec += 1000000000;
226 }
228 while (ts->tv_nsec >= 1000000000)
229 {
230 ts->tv_sec += 1;
231 ts->tv_nsec -= 1000000000;
232 }
233 }
235 void time_calc (struct timespec *ts_dest,
236 const struct timespec *ts_int,
237 const struct timeval *tv_begin,
238 const struct timeval *tv_end)
239 {
240 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
241 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
242 time_normalize (ts_dest);
244 /* Assure that `(begin + interval) > end'.
245 * This may seem overly complicated, but `tv_sec' is of type `time_t'
246 * which may be `unsigned. *sigh* */
247 if ((tv_end->tv_sec > ts_dest->tv_sec)
248 || ((tv_end->tv_sec == ts_dest->tv_sec)
249 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
250 {
251 ts_dest->tv_sec = 0;
252 ts_dest->tv_nsec = 0;
253 return;
254 }
256 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
257 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
258 time_normalize (ts_dest);
259 }
261 int main (int argc, char **argv)
262 {
263 pingobj_t *ping;
264 pingobj_iter_t *iter;
266 struct sigaction sigint_action;
268 struct timeval tv_begin;
269 struct timeval tv_end;
270 struct timespec ts_wait;
271 struct timespec ts_int;
273 int optind;
274 int i;
276 optind = read_options (argc, argv);
278 if (optind >= argc)
279 usage_exit (argv[0]);
281 if (geteuid () != 0)
282 {
283 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
284 return (1);
285 }
287 if ((ping = ping_construct ()) == NULL)
288 {
289 fprintf (stderr, "ping_construct failed\n");
290 return (1);
291 }
293 {
294 double temp_sec;
295 double temp_nsec;
297 temp_nsec = modf (opt_interval, &temp_sec);
298 ts_int.tv_sec = (time_t) temp_sec;
299 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
301 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
302 }
304 if (opt_addrfamily != PING_DEF_AF)
305 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
307 if (opt_srcaddr != NULL)
308 {
309 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
310 {
311 fprintf (stderr, "Setting source address failed: %s\n",
312 ping_get_error (ping));
313 }
314 }
316 for (i = optind; i < argc; i++)
317 {
318 if (ping_host_add (ping, argv[i]) < 0)
319 {
320 const char *errmsg = ping_get_error (ping);
322 fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
323 continue;
324 }
325 }
327 /* Drop root privileges if we're setuid-root. */
328 setuid (getuid ());
330 i = 0;
331 for (iter = ping_iterator_get (ping);
332 iter != NULL;
333 iter = ping_iterator_next (iter))
334 {
335 ping_context_t *context;
336 size_t buffer_size;
338 context = context_create ();
340 buffer_size = sizeof (context->host);
341 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
343 buffer_size = sizeof (context->addr);
344 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
346 buffer_size = 0;
347 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
349 printf ("PING %s (%s) %zu bytes of data.\n",
350 context->host, context->addr, buffer_size);
352 ping_iterator_set_context (iter, (void *) context);
354 i++;
355 }
357 if (i == 0)
358 return (1);
360 memset (&sigint_action, '\0', sizeof (sigint_action));
361 sigint_action.sa_handler = sigint_handler;
362 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
363 {
364 perror ("sigaction");
365 return (1);
366 }
368 while (opt_count != 0)
369 {
370 int status;
372 if (gettimeofday (&tv_begin, NULL) < 0)
373 {
374 perror ("gettimeofday");
375 return (1);
376 }
378 if (ping_send (ping) < 0)
379 {
380 fprintf (stderr, "ping_send failed: %s\n",
381 ping_get_error (ping));
382 return (1);
383 }
385 for (iter = ping_iterator_get (ping);
386 iter != NULL;
387 iter = ping_iterator_next (iter))
388 {
389 print_host (iter);
390 }
391 fflush (stdout);
393 /* Don't sleep in the last iteration */
394 if (opt_count == 1)
395 break;
397 if (gettimeofday (&tv_end, NULL) < 0)
398 {
399 perror ("gettimeofday");
400 return (1);
401 }
403 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
405 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
406 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
407 {
408 if (errno != EINTR)
409 {
410 perror ("nanosleep");
411 break;
412 }
413 else if (opt_count == 0)
414 {
415 /* sigint */
416 break;
417 }
418 }
420 if (opt_count > 0)
421 opt_count--;
422 } /* while (opt_count != 0) */
424 for (iter = ping_iterator_get (ping);
425 iter != NULL;
426 iter = ping_iterator_next (iter))
427 {
428 ping_context_t *context;
430 context = ping_iterator_get_context (iter);
432 printf ("\n--- %s ping statistics ---\n"
433 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
434 context->host, context->req_sent, context->req_rcvd,
435 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
436 context->latency_total);
438 if (context->req_rcvd != 0)
439 {
440 double num_total;
441 double average;
442 double deviation;
444 num_total = (double) context->req_rcvd;
446 average = context->latency_total / num_total;
447 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
448 / (num_total * (num_total - 1.0)));
450 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
451 context->latency_min,
452 average,
453 context->latency_max,
454 deviation);
455 }
457 ping_iterator_set_context (iter, NULL);
458 free (context);
459 }
461 ping_destroy (ping);
463 return (0);
464 }