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 unsigned int sequence;
161 size_t buffer_len;
162 size_t data_len;
163 ping_context_t *context;
165 buffer_len = sizeof (latency);
166 ping_iterator_get_info (iter, PING_INFO_LATENCY,
167 &latency, &buffer_len);
169 buffer_len = sizeof (sequence);
170 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
171 &sequence, &buffer_len);
173 data_len = 0;
174 ping_iterator_get_info (iter, PING_INFO_DATA,
175 NULL, &data_len);
177 context = (ping_context_t *) ping_iterator_get_context (iter);
179 context->req_sent++;
180 if (latency > 0.0)
181 {
182 context->req_rcvd++;
183 context->latency_total += latency;
184 context->latency_total_square += (latency * latency);
186 if ((context->latency_max < 0.0) || (context->latency_max < latency))
187 context->latency_max = latency;
188 if ((context->latency_min < 0.0) || (context->latency_min > latency))
189 context->latency_min = latency;
191 printf ("%u bytes from %s (%s): icmp_seq=%u time=%.2f ms\n",
192 (unsigned int) data_len,
193 context->host, context->addr,
194 (unsigned int) sequence, latency);
195 }
196 else
197 {
198 printf ("echo reply from %s (%s): icmp_seq=%u timeout\n",
199 context->host, context->addr,
200 (unsigned int) sequence);
201 }
202 }
204 void time_normalize (struct timespec *ts)
205 {
206 while (ts->tv_nsec < 0)
207 {
208 if (ts->tv_sec == 0)
209 {
210 ts->tv_nsec = 0;
211 return;
212 }
214 ts->tv_sec -= 1;
215 ts->tv_nsec += 1000000000;
216 }
218 while (ts->tv_nsec >= 1000000000)
219 {
220 ts->tv_sec += 1;
221 ts->tv_nsec -= 1000000000;
222 }
223 }
225 void time_calc (struct timespec *ts_dest,
226 const struct timespec *ts_int,
227 const struct timeval *tv_begin,
228 const struct timeval *tv_end)
229 {
230 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
231 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
232 time_normalize (ts_dest);
234 /* Assure that `(begin + interval) > end'.
235 * This may seem overly complicated, but `tv_sec' is of type `time_t'
236 * which may be `unsigned. *sigh* */
237 if ((tv_end->tv_sec > ts_dest->tv_sec)
238 || ((tv_end->tv_sec == ts_dest->tv_sec)
239 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
240 {
241 ts_dest->tv_sec = 0;
242 ts_dest->tv_nsec = 0;
243 return;
244 }
246 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
247 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
248 time_normalize (ts_dest);
249 }
251 int main (int argc, char **argv)
252 {
253 pingobj_t *ping;
254 pingobj_iter_t *iter;
256 struct sigaction sigint_action;
258 struct timeval tv_begin;
259 struct timeval tv_end;
260 struct timespec ts_wait;
261 struct timespec ts_int;
263 int optind;
264 int i;
266 optind = read_options (argc, argv);
268 if (optind >= argc)
269 usage_exit (argv[0]);
271 if (geteuid () != 0)
272 {
273 fprintf (stderr, "Need superuser privileges to open a RAW socket. Sorry.\n");
274 return (1);
275 }
277 if ((ping = ping_construct ()) == NULL)
278 {
279 fprintf (stderr, "ping_construct failed\n");
280 return (1);
281 }
283 {
284 double temp_sec;
285 double temp_nsec;
287 temp_nsec = modf (opt_interval, &temp_sec);
288 ts_int.tv_sec = (time_t) temp_sec;
289 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
291 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
292 }
294 if (opt_addrfamily != PING_DEF_AF)
295 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
297 for (i = optind; i < argc; i++)
298 {
299 if (ping_host_add (ping, argv[i]) > 0)
300 {
301 fprintf (stderr, "ping_host_add (%s) failed\n", argv[i]);
302 continue;
303 }
304 }
306 for (iter = ping_iterator_get (ping);
307 iter != NULL;
308 iter = ping_iterator_next (iter))
309 {
310 ping_context_t *context;
311 size_t buffer_size;
313 context = context_create ();
315 buffer_size = sizeof (context->host);
316 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
318 buffer_size = sizeof (context->addr);
319 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
321 buffer_size = 0;
322 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
324 printf ("PING %s (%s) %u bytes of data.\n",
325 context->host, context->addr, (unsigned int) buffer_size);
327 ping_iterator_set_context (iter, (void *) context);
328 }
330 memset (&sigint_action, '\0', sizeof (sigint_action));
331 sigint_action.sa_handler = sigint_handler;
332 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
333 {
334 perror ("sigaction");
335 return (1);
336 }
338 while (opt_count != 0)
339 {
340 int status;
342 if (gettimeofday (&tv_begin, NULL) < 0)
343 {
344 perror ("gettimeofday");
345 return (1);
346 }
348 if (ping_send (ping) < 0)
349 {
350 fprintf (stderr, "ping_send failed\n");
351 return (1);
352 }
354 for (iter = ping_iterator_get (ping);
355 iter != NULL;
356 iter = ping_iterator_next (iter))
357 {
358 print_host (iter);
359 }
360 fflush (stdout);
362 /* Don't sleep in the last iteration */
363 if (opt_count == 1)
364 break;
366 if (gettimeofday (&tv_end, NULL) < 0)
367 {
368 perror ("gettimeofday");
369 return (1);
370 }
372 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
374 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
375 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
376 {
377 if (errno != EINTR)
378 {
379 perror ("nanosleep");
380 break;
381 }
382 else if (opt_count == 0)
383 {
384 /* sigint */
385 break;
386 }
387 }
389 if (opt_count > 0)
390 opt_count--;
391 } /* while (opt_count != 0) */
393 for (iter = ping_iterator_get (ping);
394 iter != NULL;
395 iter = ping_iterator_next (iter))
396 {
397 ping_context_t *context;
399 context = ping_iterator_get_context (iter);
401 printf ("\n--- %s ping statistics ---\n"
402 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
403 context->host, context->req_sent, context->req_rcvd,
404 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
405 context->latency_total);
407 if (context->req_rcvd != 0)
408 {
409 double num_total;
410 double average;
411 double deviation;
413 num_total = (double) context->req_rcvd;
415 average = context->latency_total / num_total;
416 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
417 / (num_total * (num_total - 1.0)));
419 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
420 context->latency_min,
421 average,
422 context->latency_max,
423 deviation);
424 }
426 ping_iterator_set_context (iter, NULL);
427 free (context);
428 }
430 ping_destroy (ping);
432 return (0);
433 }