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; either version 2 of the License, or
8 * (at your option) any later version.
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 int opt_count = -1;
77 void sigint_handler (int signal)
78 {
79 /* Exit the loop */
80 opt_count = 0;
81 }
83 ping_context_t *context_create (void)
84 {
85 ping_context_t *ret;
87 if ((ret = malloc (sizeof (ping_context_t))) == NULL)
88 return (NULL);
90 memset (ret, '\0', sizeof (ping_context_t));
92 ret->latency_min = -1.0;
93 ret->latency_max = -1.0;
94 ret->latency_total = 0.0;
95 ret->latency_total_square = 0.0;
97 return (ret);
98 }
100 void context_destroy (ping_context_t *context)
101 {
102 free (context);
103 }
105 void usage_exit (const char *name)
106 {
107 fprintf (stderr, "Usage: %s [-46] [-c count] [-i interval] host [host [host ...]]\n",
108 name);
109 exit (1);
110 }
112 int read_options (int argc, char **argv)
113 {
114 int optchar;
116 while (1)
117 {
118 optchar = getopt (argc, argv, "46c:hi:");
120 if (optchar == -1)
121 break;
123 switch (optchar)
124 {
125 case '4':
126 case '6':
127 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
128 break;
130 case 'c':
131 {
132 int new_count;
133 new_count = atoi (optarg);
134 if (new_count > 0)
135 opt_count = new_count;
136 }
137 break;
139 case 'i':
140 {
141 double new_interval;
142 new_interval = atof (optarg);
143 if (new_interval >= 0.2)
144 opt_interval = new_interval;
145 }
146 break;
148 case 'h':
149 default:
150 usage_exit (argv[0]);
151 }
152 }
154 return (optind);
155 }
157 void print_host (pingobj_iter_t *iter)
158 {
159 double latency;
160 uint16_t sequence;
161 size_t buffer_len;
162 ping_context_t *context;
164 buffer_len = sizeof (latency);
165 ping_iterator_get_info (iter, PING_INFO_LATENCY,
166 &latency, &buffer_len);
168 buffer_len = sizeof (sequence);
169 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
170 &sequence, &buffer_len);
172 context = (ping_context_t *) ping_iterator_get_context (iter);
174 context->req_sent++;
175 if (latency > 0.0)
176 {
177 context->req_rcvd++;
178 context->latency_total += latency;
179 context->latency_total_square += (latency * latency);
181 if ((context->latency_max < 0.0) || (context->latency_max < latency))
182 context->latency_max = latency;
183 if ((context->latency_min < 0.0) || (context->latency_min > latency))
184 context->latency_min = latency;
186 printf ("echo reply from %s (%s): icmp_seq=%u time=%.2f ms\n",
187 context->host, context->addr,
188 (unsigned int) sequence, latency);
189 }
190 else
191 {
192 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
193 context->host, context->addr,
194 (unsigned int) sequence);
195 }
196 }
198 void time_normalize (struct timespec *ts)
199 {
200 while (ts->tv_nsec < 0)
201 {
202 if (ts->tv_sec == 0)
203 {
204 ts->tv_nsec = 0;
205 return;
206 }
208 ts->tv_sec -= 1;
209 ts->tv_nsec += 1000000000;
210 }
212 while (ts->tv_nsec >= 1000000000)
213 {
214 ts->tv_sec += 1;
215 ts->tv_nsec -= 1000000000;
216 }
217 }
219 void time_calc (struct timespec *ts_dest,
220 const struct timespec *ts_int,
221 const struct timeval *tv_begin,
222 const struct timeval *tv_end)
223 {
224 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
225 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
226 time_normalize (ts_dest);
228 /* Assure that `(begin + interval) > end'.
229 * This may seem overly complicated, but `tv_sec' is of type `time_t'
230 * which may be `unsigned. *sigh* */
231 if ((tv_end->tv_sec > ts_dest->tv_sec)
232 || ((tv_end->tv_sec == ts_dest->tv_sec)
233 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
234 {
235 ts_dest->tv_sec = 0;
236 ts_dest->tv_nsec = 0;
237 return;
238 }
240 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
241 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
242 time_normalize (ts_dest);
243 }
245 int main (int argc, char **argv)
246 {
247 pingobj_t *ping;
248 pingobj_iter_t *iter;
250 struct sigaction sigint_action;
252 struct timeval tv_begin;
253 struct timeval tv_end;
254 struct timespec ts_wait;
255 struct timespec ts_int;
257 int optind;
258 int i;
260 optind = read_options (argc, argv);
262 if (optind >= argc)
263 usage_exit (argv[0]);
265 if (geteuid () != 0)
266 {
267 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
268 return (1);
269 }
271 if ((ping = ping_construct ()) == NULL)
272 {
273 fprintf (stderr, "ping_construct failed\n");
274 return (1);
275 }
277 {
278 double temp_sec;
279 double temp_nsec;
281 temp_nsec = modf (opt_interval, &temp_sec);
282 ts_int.tv_sec = (time_t) temp_sec;
283 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
285 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
286 }
288 if (opt_addrfamily != PING_DEF_AF)
289 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
291 for (i = optind; i < argc; i++)
292 {
293 if (ping_host_add (ping, argv[i]) > 0)
294 {
295 fprintf (stderr, "ping_host_add (%s) failed\n", argv[i]);
296 continue;
297 }
298 }
300 for (iter = ping_iterator_get (ping);
301 iter != NULL;
302 iter = ping_iterator_next (iter))
303 {
304 ping_context_t *context;
305 size_t buffer_size;
307 context = context_create ();
309 buffer_size = sizeof (context->host);
310 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
312 buffer_size = sizeof (context->addr);
313 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
315 ping_iterator_set_context (iter, (void *) context);
316 }
318 memset (&sigint_action, '\0', sizeof (sigint_action));
319 sigint_action.sa_handler = sigint_handler;
320 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
321 {
322 perror ("sigaction");
323 return (1);
324 }
326 while (opt_count != 0)
327 {
328 int status;
330 if (gettimeofday (&tv_begin, NULL) < 0)
331 {
332 perror ("gettimeofday");
333 return (1);
334 }
336 if (ping_send (ping) < 0)
337 {
338 fprintf (stderr, "ping_send failed\n");
339 return (1);
340 }
342 for (iter = ping_iterator_get (ping);
343 iter != NULL;
344 iter = ping_iterator_next (iter))
345 {
346 print_host (iter);
347 }
348 fflush (stdout);
350 /* Don't sleep in the last iteration */
351 if (opt_count == 1)
352 break;
354 if (gettimeofday (&tv_end, NULL) < 0)
355 {
356 perror ("gettimeofday");
357 return (1);
358 }
360 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
362 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
363 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
364 {
365 if (errno != EINTR)
366 {
367 perror ("nanosleep");
368 break;
369 }
370 else if (opt_count == 0)
371 {
372 /* sigint */
373 break;
374 }
375 }
377 if (opt_count > 0)
378 opt_count--;
379 } /* while (opt_count != 0) */
381 for (iter = ping_iterator_get (ping);
382 iter != NULL;
383 iter = ping_iterator_next (iter))
384 {
385 ping_context_t *context;
387 context = ping_iterator_get_context (iter);
389 printf ("\n--- %s ping statistics ---\n"
390 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
391 context->host, context->req_sent, context->req_rcvd,
392 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
393 context->latency_total);
395 if (context->req_rcvd != 0)
396 {
397 double num_total;
398 double average;
399 double deviation;
401 num_total = (double) context->req_rcvd;
403 average = context->latency_total / num_total;
404 deviation = sqrt (context->latency_total_square - (num_total * average * average));
406 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
407 context->latency_min,
408 average,
409 context->latency_max,
410 deviation);
411 }
413 ping_iterator_set_context (iter, NULL);
414 free (context);
415 }
417 ping_destroy (ping);
419 return (0);
420 }