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_UNISTD_H
35 # include <unistd.h>
36 #endif
38 #if HAVE_FCNTL_H
39 # include <fcntl.h>
40 #endif
41 #if HAVE_SYS_TYPES_H
42 # include <sys/types.h>
43 #endif
44 #if HAVE_SYS_STAT_H
45 # include <sys/stat.h>
46 #endif
48 #if TIME_WITH_SYS_TIME
49 # include <sys/time.h>
50 # include <time.h>
51 #else
52 # if HAVE_SYS_TIME_H
53 # include <sys/time.h>
54 # else
55 # include <time.h>
56 # endif
57 #endif
59 #if HAVE_SYS_SOCKET_H
60 # include <sys/socket.h>
61 #endif
62 #if HAVE_NETDB_H
63 # include <netdb.h>
64 #endif
66 #if HAVE_NETINET_IN_SYSTM_H
67 # include <netinet/in_systm.h>
68 #endif
69 #if HAVE_NETINET_IN_H
70 # include <netinet/in.h>
71 #endif
72 #if HAVE_NETINET_IP_H
73 # include <netinet/ip.h>
74 #endif
75 #if HAVE_NETINET_IP_ICMP_H
76 # include <netinet/ip_icmp.h>
77 #endif
78 #ifdef HAVE_NETINET_IP_VAR_H
79 # include <netinet/ip_var.h>
80 #endif
81 #if HAVE_NETINET_IP6_H
82 # include <netinet/ip6.h>
83 #endif
84 #if HAVE_NETINET_ICMP6_H
85 # include <netinet/icmp6.h>
86 #endif
88 #include "oping.h"
90 #if WITH_DEBUG
91 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
92 #else
93 # define dprintf(...) /**/
94 #endif
96 #define PING_ERRMSG_LEN 256
98 struct pinghost
99 {
100 char *hostname;
101 struct sockaddr_storage *addr;
102 socklen_t addrlen;
103 int addrfamily;
104 int fd;
105 int ident;
106 int sequence;
107 struct timeval *timer;
108 double latency;
109 char *data;
111 void *context;
113 struct pinghost *next;
114 };
116 struct pingobj
117 {
118 double timeout;
119 int ttl;
120 int addrfamily;
121 char *data;
123 char errmsg[PING_ERRMSG_LEN];
125 pinghost_t *head;
126 };
128 /*
129 * private (static) functions
130 */
131 static void ping_set_error (pingobj_t *obj, const char *function,
132 const char *message)
133 {
134 snprintf (obj->errmsg, PING_ERRMSG_LEN, "%s: %s", function, message);
135 obj->errmsg[PING_ERRMSG_LEN - 1] = '\0';
136 }
138 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
139 struct timeval *res)
140 {
141 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
142 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
144 while (res->tv_usec > 1000000)
145 {
146 res->tv_usec -= 1000000;
147 res->tv_sec++;
148 }
150 return (0);
151 }
153 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
154 struct timeval *res)
155 {
157 if ((tv1->tv_sec < tv2->tv_sec)
158 || ((tv1->tv_sec == tv2->tv_sec)
159 && (tv1->tv_usec < tv2->tv_usec)))
160 return (-1);
162 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
163 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
165 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec > 0)));
167 while (res->tv_usec < 0)
168 {
169 res->tv_usec += 1000000;
170 res->tv_sec--;
171 }
173 return (0);
174 }
176 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
177 {
178 uint32_t sum = 0;
179 uint16_t ret = 0;
181 uint16_t *ptr;
183 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
184 sum += *ptr;
186 if (len == 1)
187 {
188 *(char *) &ret = *(char *) ptr;
189 sum += ret;
190 }
192 /* Do this twice to get all possible carries.. */
193 sum = (sum >> 16) + (sum & 0xFFFF);
194 sum = (sum >> 16) + (sum & 0xFFFF);
196 ret = ~sum;
198 return (ret);
199 }
201 static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len)
202 {
203 struct ip *ip_hdr;
204 struct icmp *icmp_hdr;
206 size_t ip_hdr_len;
208 uint16_t recv_checksum;
209 uint16_t calc_checksum;
211 uint16_t ident;
212 uint16_t seq;
214 pinghost_t *ptr;
216 if (buffer_len < sizeof (struct ip))
217 return (NULL);
219 ip_hdr = (struct ip *) buffer;
220 ip_hdr_len = ip_hdr->ip_hl << 2;
222 if (buffer_len < ip_hdr_len)
223 return (NULL);
225 buffer += ip_hdr_len;
226 buffer_len -= ip_hdr_len;
228 if (buffer_len < sizeof (struct icmp))
229 return (NULL);
231 icmp_hdr = (struct icmp *) buffer;
232 buffer += sizeof (struct icmp);
233 buffer_len -= sizeof (struct icmp);
235 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
236 {
237 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
238 return (NULL);
239 }
241 recv_checksum = icmp_hdr->icmp_cksum;
242 icmp_hdr->icmp_cksum = 0;
243 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
244 sizeof (struct icmp) + buffer_len);
246 if (recv_checksum != calc_checksum)
247 {
248 dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n",
249 recv_checksum, calc_checksum);
250 return (NULL);
251 }
253 ident = ntohs (icmp_hdr->icmp_id);
254 seq = ntohs (icmp_hdr->icmp_seq);
256 for (ptr = ph; ptr != NULL; ptr = ptr->next)
257 {
258 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
259 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
261 if (ptr->addrfamily != AF_INET)
262 continue;
264 if (!timerisset (ptr->timer))
265 continue;
267 if (ptr->ident != ident)
268 continue;
270 if (((ptr->sequence - 1) & 0xFFFF) != seq)
271 continue;
273 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
274 ptr->hostname, ident, seq);
276 break;
277 }
279 if (ptr == NULL)
280 {
281 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
282 ident, seq);
283 }
285 return (ptr);
286 }
288 static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len)
289 {
290 struct icmp6_hdr *icmp_hdr;
292 uint16_t ident;
293 uint16_t seq;
295 pinghost_t *ptr;
297 if (buffer_len < sizeof (struct icmp6_hdr))
298 return (NULL);
300 icmp_hdr = (struct icmp6_hdr *) buffer;
301 buffer += sizeof (struct icmp);
302 buffer_len -= sizeof (struct icmp);
304 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
305 {
306 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
307 return (NULL);
308 }
310 if (icmp_hdr->icmp6_code != 0)
311 {
312 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
313 return (NULL);
314 }
316 ident = ntohs (icmp_hdr->icmp6_id);
317 seq = ntohs (icmp_hdr->icmp6_seq);
319 for (ptr = ph; ptr != NULL; ptr = ptr->next)
320 {
321 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
322 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
324 if (ptr->addrfamily != AF_INET6)
325 continue;
327 if (!timerisset (ptr->timer))
328 continue;
330 if (ptr->ident != ident)
331 continue;
333 if (((ptr->sequence - 1) & 0xFFFF) != seq)
334 continue;
336 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
337 ptr->hostname, ident, seq);
339 break;
340 }
342 if (ptr == NULL)
343 {
344 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
345 ident, seq);
346 }
348 return (ptr);
349 }
351 static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now)
352 {
353 char buffer[4096];
354 size_t buffer_len;
356 struct timeval diff;
358 pinghost_t *host = NULL;
360 struct sockaddr_storage sa;
361 socklen_t sa_len;
363 sa_len = sizeof (sa);
365 buffer_len = recvfrom (fd, buffer, sizeof (buffer), 0,
366 (struct sockaddr *) &sa, &sa_len);
367 if (buffer_len == -1)
368 {
369 dprintf ("recvfrom: %s\n", strerror (errno));
370 return (-1);
371 }
373 dprintf ("Read %u bytes from fd = %i\n", (unsigned int) buffer_len, fd);
375 if (sa.ss_family == AF_INET)
376 {
377 if ((host = ping_receive_ipv4 (ph, buffer, buffer_len)) == NULL)
378 return (-1);
379 }
380 else if (sa.ss_family == AF_INET6)
381 {
382 if ((host = ping_receive_ipv6 (ph, buffer, buffer_len)) == NULL)
383 return (-1);
384 }
386 dprintf ("rcvd: %12i.%06i\n",
387 (int) now->tv_sec,
388 (int) now->tv_usec);
389 dprintf ("sent: %12i.%06i\n",
390 (int) host->timer->tv_sec,
391 (int) host->timer->tv_usec);
393 if (ping_timeval_sub (now, host->timer, &diff) < 0)
394 {
395 timerclear (host->timer);
396 return (-1);
397 }
399 dprintf ("diff: %12i.%06i\n",
400 (int) diff.tv_sec,
401 (int) diff.tv_usec);
403 host->latency = ((double) diff.tv_usec) / 1000.0;
404 host->latency += ((double) diff.tv_sec) * 1000.0;
406 timerclear (host->timer);
408 return (0);
409 }
411 static int ping_receive_all (pingobj_t *obj)
412 {
413 fd_set readfds;
414 int num_readfds;
415 int max_readfds;
417 pinghost_t *ph;
418 pinghost_t *ptr;
420 struct timeval endtime;
421 struct timeval nowtime;
422 struct timeval timeout;
423 int status;
425 int ret;
427 ph = obj->head;
428 ret = 0;
430 for (ptr = ph; ptr != NULL; ptr = ptr->next)
431 ptr->latency = -1.0;
433 if (gettimeofday (&nowtime, NULL) == -1)
434 {
435 ping_set_error (obj, "gettimeofday", strerror (errno));
436 return (-1);
437 }
439 /* Set up timeout */
440 timeout.tv_sec = (time_t) obj->timeout;
441 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
443 dprintf ("Set timeout to %i.%06i seconds\n",
444 (int) timeout.tv_sec,
445 (int) timeout.tv_usec);
447 ping_timeval_add (&nowtime, &timeout, &endtime);
449 while (1)
450 {
451 FD_ZERO (&readfds);
452 num_readfds = 0;
453 max_readfds = -1;
455 for (ptr = ph; ptr != NULL; ptr = ptr->next)
456 {
457 if (!timerisset (ptr->timer))
458 continue;
460 FD_SET (ptr->fd, &readfds);
461 num_readfds++;
463 if (max_readfds < ptr->fd)
464 max_readfds = ptr->fd;
465 }
467 if (num_readfds == 0)
468 break;
470 if (gettimeofday (&nowtime, NULL) == -1)
471 {
472 ping_set_error (obj, "gettimeofday", strerror (errno));
473 return (-1);
474 }
476 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
477 break;
479 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
480 (int) timeout.tv_sec,
481 (int) timeout.tv_usec);
483 status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
485 if (gettimeofday (&nowtime, NULL) == -1)
486 {
487 ping_set_error (obj, "gettimeofday", strerror (errno));
488 return (-1);
489 }
491 if ((status == -1) && (errno == EINTR))
492 {
493 dprintf ("select was interrupted by signal..\n");
494 continue;
495 }
496 else if (status < 0)
497 {
498 dprintf ("select: %s\n", strerror (errno));
499 break;
500 }
501 else if (status == 0)
502 {
503 dprintf ("select timed out\n");
504 break;
505 }
507 for (ptr = ph; ptr != NULL; ptr = ptr->next)
508 {
509 if (FD_ISSET (ptr->fd, &readfds))
510 if (ping_receive_one (ptr->fd, ph, &nowtime) == 0)
511 ret++;
512 }
513 } /* while (1) */
515 return (ret);
516 }
518 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
519 * Sending functions: *
520 * *
521 * ping_send_all *
522 * +-> ping_send_one_ipv4 *
523 * `-> ping_send_one_ipv6 *
524 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
525 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
526 const void *buf, size_t buflen)
527 {
528 ssize_t ret;
530 if (gettimeofday (ph->timer, NULL) == -1)
531 {
532 timerclear (ph->timer);
533 return (-1);
534 }
536 ret = sendto (ph->fd, buf, buflen, 0,
537 (struct sockaddr *) ph->addr, ph->addrlen);
539 if (ret < 0)
540 {
541 #if defined(EHOSTUNREACH)
542 if (errno == EHOSTUNREACH)
543 return (0);
544 #endif
545 #if defined(ENETUNREACH)
546 if (errno == ENETUNREACH)
547 return (0);
548 #endif
549 ping_set_error (obj, "sendto", strerror (errno));
550 }
552 return (ret);
553 }
555 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
556 {
557 struct icmp *icmp4;
558 int status;
560 char buf[4096];
561 int buflen;
563 char *data;
564 int datalen;
566 dprintf ("ph->hostname = %s\n", ph->hostname);
568 memset (buf, '\0', sizeof (buf));
569 icmp4 = (struct icmp *) buf;
570 data = (char *) (icmp4 + 1);
572 icmp4->icmp_type = ICMP_ECHO;
573 icmp4->icmp_code = 0;
574 icmp4->icmp_cksum = 0;
575 icmp4->icmp_id = htons (ph->ident);
576 icmp4->icmp_seq = htons (ph->sequence);
578 buflen = 4096 - sizeof (struct icmp);
579 strncpy (data, ph->data, buflen);
580 datalen = strlen (data);
582 buflen = datalen + sizeof (struct icmp);
584 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
586 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
588 status = ping_sendto (obj, ph, buf, buflen);
589 if (status < 0)
590 {
591 perror ("ping_sendto");
592 return (-1);
593 }
595 dprintf ("sendto: status = %i\n", status);
597 return (0);
598 }
600 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
601 {
602 struct icmp6_hdr *icmp6;
603 int status;
605 char buf[4096];
606 int buflen;
608 char *data;
609 int datalen;
611 dprintf ("ph->hostname = %s\n", ph->hostname);
613 memset (buf, '\0', sizeof (buf));
614 icmp6 = (struct icmp6_hdr *) buf;
615 data = (char *) (icmp6 + 1);
617 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
618 icmp6->icmp6_code = 0;
619 /* The checksum will be calculated by the TCP/IP stack. */
620 /* FIXME */
621 icmp6->icmp6_cksum = 0;
622 icmp6->icmp6_id = htons (ph->ident);
623 icmp6->icmp6_seq = htons (ph->sequence);
625 buflen = 4096 - sizeof (struct icmp6_hdr);
626 strncpy (data, ph->data, buflen);
627 datalen = strlen (data);
629 buflen = datalen + sizeof (struct icmp6_hdr);
631 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
633 status = ping_sendto (obj, ph, buf, buflen);
634 if (status < 0)
635 {
636 perror ("ping_sendto");
637 return (-1);
638 }
640 dprintf ("sendto: status = %i\n", status);
642 return (0);
643 }
645 static int ping_send_all (pingobj_t *obj)
646 {
647 pinghost_t *ph;
648 pinghost_t *ptr;
650 int ret;
652 ret = 0;
653 ph = obj->head;
655 for (ptr = ph; ptr != NULL; ptr = ptr->next)
656 {
657 /* start timer.. The GNU `ping6' starts the timer before
658 * sending the packet, so I will do that too */
659 if (gettimeofday (ptr->timer, NULL) == -1)
660 {
661 dprintf ("gettimeofday: %s\n", strerror (errno));
662 timerclear (ptr->timer);
663 ret--;
664 continue;
665 }
666 else
667 {
668 dprintf ("timer set for hostname = %s\n", ptr->hostname);
669 }
671 if (ptr->addrfamily == AF_INET6)
672 {
673 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
674 if (ping_send_one_ipv6 (obj, ptr) != 0)
675 {
676 timerclear (ptr->timer);
677 ret--;
678 continue;
679 }
680 }
681 else if (ptr->addrfamily == AF_INET)
682 {
683 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
684 if (ping_send_one_ipv4 (obj, ptr) != 0)
685 {
686 timerclear (ptr->timer);
687 ret--;
688 continue;
689 }
690 }
691 else /* this should not happen */
692 {
693 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
694 timerclear (ptr->timer);
695 ret--;
696 continue;
697 }
699 ptr->sequence++;
700 }
702 return (ret);
703 }
705 /*
706 * Set the TTL of a socket protocol independently.
707 */
708 static int ping_set_ttl (pinghost_t *ph, int ttl)
709 {
710 int ret = -2;
712 if (ph->addrfamily == AF_INET)
713 {
714 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL, &ttl, sizeof (ttl));
715 }
716 else if (ph->addrfamily == AF_INET6)
717 {
718 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof (ttl));
719 }
721 return (ret);
722 }
724 static int ping_get_ident (void)
725 {
726 int fd;
727 static int did_seed = 0;
729 int retval;
731 if (did_seed == 0)
732 {
733 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
734 {
735 unsigned int seed;
737 if (read (fd, &seed, sizeof (seed)) != -1)
738 {
739 did_seed = 1;
740 dprintf ("Random seed: %i\n", seed);
741 srandom (seed);
742 }
744 close (fd);
745 }
746 else
747 {
748 dprintf ("open (/dev/urandom): %s\n", strerror (errno));
749 }
750 }
752 retval = (int) random ();
754 dprintf ("Random number: %i\n", retval);
756 return (retval);
757 }
759 static pinghost_t *ping_alloc (void)
760 {
761 pinghost_t *ph;
762 size_t ph_size;
764 ph_size = sizeof (pinghost_t)
765 + sizeof (struct sockaddr_storage)
766 + sizeof (struct timeval);
768 ph = (pinghost_t *) malloc (ph_size);
769 if (ph == NULL)
770 return (NULL);
772 memset (ph, '\0', ph_size);
774 ph->timer = (struct timeval *) (ph + 1);
775 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
777 ph->addrlen = sizeof (struct sockaddr_storage);
778 ph->latency = -1.0;
779 ph->ident = ping_get_ident () & 0xFFFF;
781 return (ph);
782 }
784 static void ping_free (pinghost_t *ph)
785 {
786 if (ph->hostname != NULL)
787 free (ph->hostname);
789 if (ph->data != NULL)
790 free (ph->data);
792 free (ph);
793 }
795 /*
796 * public methods
797 */
798 const char *ping_get_error (pingobj_t *obj)
799 {
800 return (obj->errmsg);
801 }
803 pingobj_t *ping_construct (void)
804 {
805 pingobj_t *obj;
807 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
808 return (NULL);
809 memset (obj, '\0', sizeof (pingobj_t));
811 obj->timeout = PING_DEF_TIMEOUT;
812 obj->ttl = PING_DEF_TTL;
813 obj->addrfamily = PING_DEF_AF;
814 obj->data = strdup (PING_DEF_DATA);
816 return (obj);
817 }
819 void ping_destroy (pingobj_t *obj)
820 {
821 pinghost_t *current;
822 pinghost_t *next;
824 current = obj->head;
825 next = NULL;
827 while (current != NULL)
828 {
829 next = current->next;
830 ping_free (current);
831 current = next;
832 }
834 if (obj->data != NULL)
835 free (obj->data);
837 free (obj);
839 return;
840 }
842 int ping_setopt (pingobj_t *obj, int option, void *value)
843 {
844 int ret = 0;
846 switch (option)
847 {
848 case PING_OPT_TIMEOUT:
849 obj->timeout = *((double *) value);
850 if (obj->timeout < 0.0)
851 {
852 obj->timeout = PING_DEF_TIMEOUT;
853 ret = -1;
854 }
855 break;
857 case PING_OPT_TTL:
858 obj->ttl = *((int *) value);
859 if ((obj->ttl < 1) || (obj->ttl > 255))
860 {
861 obj->ttl = PING_DEF_TTL;
862 ret = -1;
863 }
864 break;
866 case PING_OPT_AF:
867 obj->addrfamily = *((int *) value);
868 if ((obj->addrfamily != AF_UNSPEC)
869 && (obj->addrfamily != AF_INET)
870 && (obj->addrfamily != AF_INET6))
871 {
872 obj->addrfamily = PING_DEF_AF;
873 ret = -1;
874 }
875 break;
877 case PING_OPT_DATA:
878 if (obj->data != NULL)
879 {
880 free (obj->data);
881 obj->data = NULL;
882 }
883 obj->data = strdup ((const char *) value);
884 break;
886 default:
887 ret = -2;
888 } /* switch (option) */
890 return (ret);
891 } /* int ping_setopt */
894 int ping_send (pingobj_t *obj)
895 {
896 int ret;
898 if (ping_send_all (obj) < 0)
899 return (-1);
901 if ((ret = ping_receive_all (obj)) < 0)
902 return (-2);
904 return (ret);
905 }
907 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
908 {
909 while (ph != NULL)
910 {
911 if (strcasecmp (ph->hostname, host) == 0)
912 break;
914 ph = ph->next;
915 }
917 return (ph);
918 }
920 int ping_host_add (pingobj_t *obj, const char *host)
921 {
922 pinghost_t *ph;
924 struct sockaddr_storage sockaddr;
925 socklen_t sockaddr_len;
927 struct addrinfo ai_hints;
928 struct addrinfo *ai_list, *ai_ptr;
929 int ai_return;
931 dprintf ("host = %s\n", host);
933 if (ping_host_search (obj->head, host) != NULL)
934 return (0);
936 memset (&ai_hints, '\0', sizeof (ai_hints));
937 ai_hints.ai_flags = 0;
938 #ifdef AI_ADDRCONFIG
939 ai_hints.ai_flags |= AI_ADDRCONFIG;
940 #endif
941 ai_hints.ai_family = obj->addrfamily;
942 ai_hints.ai_socktype = SOCK_RAW;
944 if ((ph = ping_alloc ()) == NULL)
945 {
946 dprintf ("Out of memory!\n");
947 return (-1);
948 }
950 if ((ph->hostname = strdup (host)) == NULL)
951 {
952 dprintf ("Out of memory!\n");
953 ping_set_error (obj, "strdup", strerror (errno));
954 ping_free (ph);
955 return (-1);
956 }
958 /* obj->data is not garuanteed to be != NULL */
959 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
960 {
961 dprintf ("Out of memory!\n");
962 ping_set_error (obj, "strdup", strerror (errno));
963 ping_free (ph);
964 return (-1);
965 }
967 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
968 {
969 dprintf ("getaddrinfo failed\n");
970 ping_set_error (obj, "getaddrinfo",
971 (ai_return == EAI_SYSTEM)
972 ? strerror (errno)
973 : gai_strerror (ai_return));
974 ping_free (ph);
975 return (-1);
976 }
978 if (ai_list == NULL)
979 ping_set_error (obj, "getaddrinfo", "No hosts returned");
981 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
982 {
983 ph->fd = -1;
985 sockaddr_len = sizeof (sockaddr);
986 memset (&sockaddr, '\0', sockaddr_len);
988 if (ai_ptr->ai_family == AF_INET)
989 {
990 struct sockaddr_in *si;
992 si = (struct sockaddr_in *) &sockaddr;
993 si->sin_family = AF_INET;
994 si->sin_port = htons (ph->ident);
995 si->sin_addr.s_addr = htonl (INADDR_ANY);
997 ai_ptr->ai_socktype = SOCK_RAW;
998 ai_ptr->ai_protocol = IPPROTO_ICMP;
999 }
1000 else if (ai_ptr->ai_family == AF_INET6)
1001 {
1002 struct sockaddr_in6 *si;
1004 si = (struct sockaddr_in6 *) &sockaddr;
1005 si->sin6_family = AF_INET6;
1006 si->sin6_port = htons (ph->ident);
1007 si->sin6_addr = in6addr_any;
1009 ai_ptr->ai_socktype = SOCK_RAW;
1010 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1011 }
1012 else
1013 {
1014 char errmsg[PING_ERRMSG_LEN];
1016 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1017 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1019 dprintf (errmsg);
1020 ping_set_error (obj, "getaddrinfo", errmsg);
1021 continue;
1022 }
1024 /* TODO: Move this to a static function `ping_open_socket' and
1025 * call it whenever the socket dies. */
1026 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1027 if (ph->fd == -1)
1028 {
1029 dprintf ("socket: %s\n", strerror (errno));
1030 ping_set_error (obj, "socket", strerror (errno));
1031 continue;
1032 }
1034 /*
1035 * The majority vote of operating systems has decided that you don't need to
1036 * bind here. This code should be reactivated to bind to a specific address,
1037 * though. See the `-I' option of `ping(1)' (GNU). -octo
1038 */
1039 #if 0
1040 if (bind (ph->fd, (struct sockaddr *) &sockaddr, sockaddr_len) == -1)
1041 {
1042 dprintf ("bind: %s\n", strerror (errno));
1043 ping_set_error (obj, "bind", strerror (errno));
1044 close (ph->fd);
1045 ph->fd = -1;
1046 continue;
1047 }
1048 #endif
1050 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1051 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1052 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1053 ph->addrlen = ai_ptr->ai_addrlen;
1054 ph->addrfamily = ai_ptr->ai_family;
1056 break;
1057 }
1059 freeaddrinfo (ai_list);
1061 if (ph->fd < 0)
1062 {
1063 free (ph->hostname);
1064 free (ph);
1065 return (-1);
1066 }
1068 /*
1069 * Adding in the front is much easier, but then the iterator will
1070 * return the host that was added last as first host. That's just not
1071 * nice. -octo
1072 */
1073 if (obj->head == NULL)
1074 {
1075 obj->head = ph;
1076 }
1077 else
1078 {
1079 pinghost_t *hptr;
1081 hptr = obj->head;
1082 while (hptr->next != NULL)
1083 hptr = hptr->next;
1085 assert ((hptr != NULL) && (hptr->next == NULL));
1086 hptr->next = ph;
1087 }
1089 ping_set_ttl (ph, obj->ttl);
1091 return (0);
1092 }
1094 int ping_host_remove (pingobj_t *obj, const char *host)
1095 {
1096 pinghost_t *pre, *cur;
1098 pre = NULL;
1099 cur = obj->head;
1101 while (cur != NULL)
1102 {
1103 if (strcasecmp (host, cur->hostname))
1104 break;
1106 pre = cur;
1107 cur = cur->next;
1108 }
1110 if (cur == NULL)
1111 {
1112 ping_set_error (obj, "ping_host_remove", "Host not found");
1113 return (-1);
1114 }
1116 if (pre == NULL)
1117 obj->head = cur->next;
1118 else
1119 pre->next = cur->next;
1121 if (cur->fd >= 0)
1122 close (cur->fd);
1124 ping_free (cur);
1126 return (0);
1127 }
1129 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1130 {
1131 return ((pingobj_iter_t *) obj->head);
1132 }
1134 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1135 {
1136 return ((pingobj_iter_t *) iter->next);
1137 }
1139 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1140 void *buffer, size_t *buffer_len)
1141 {
1142 int ret = EINVAL;
1144 size_t orig_buffer_len = *buffer_len;
1146 switch (info)
1147 {
1148 case PING_INFO_HOSTNAME:
1149 ret = ENOMEM;
1150 *buffer_len = strlen (iter->hostname);
1151 if (orig_buffer_len <= *buffer_len)
1152 break;
1153 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1154 * will copy `*buffer_len' and pad the rest of
1155 * `buffer' with null-bytes */
1156 strncpy (buffer, iter->hostname, orig_buffer_len);
1157 ret = 0;
1158 break;
1160 case PING_INFO_ADDRESS:
1161 ret = getnameinfo ((struct sockaddr *) iter->addr,
1162 iter->addrlen,
1163 (char *) buffer,
1164 *buffer_len,
1165 NULL, 0,
1166 NI_NUMERICHOST);
1167 if (ret != 0)
1168 {
1169 if ((ret == EAI_MEMORY)
1170 #ifdef EAI_OVERFLOW
1171 || (ret == EAI_OVERFLOW)
1172 #endif
1173 )
1174 ret = ENOMEM;
1175 else if (ret == EAI_SYSTEM)
1176 /* XXX: Not thread-safe! */
1177 ret = errno;
1178 else
1179 ret = EINVAL;
1180 }
1181 break;
1183 case PING_INFO_FAMILY:
1184 ret = ENOMEM;
1185 *buffer_len = sizeof (int);
1186 if (orig_buffer_len < sizeof (int))
1187 break;
1188 *((int *) buffer) = iter->addrfamily;
1189 ret = 0;
1190 break;
1192 case PING_INFO_LATENCY:
1193 ret = ENOMEM;
1194 *buffer_len = sizeof (double);
1195 if (orig_buffer_len < sizeof (double))
1196 break;
1197 *((double *) buffer) = iter->latency;
1198 ret = 0;
1199 break;
1201 case PING_INFO_SEQUENCE:
1202 ret = ENOMEM;
1203 *buffer_len = sizeof (unsigned int);
1204 if (orig_buffer_len < sizeof (unsigned int))
1205 break;
1206 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1207 ret = 0;
1208 break;
1210 case PING_INFO_IDENT:
1211 ret = ENOMEM;
1212 *buffer_len = sizeof (uint16_t);
1213 if (orig_buffer_len < sizeof (uint16_t))
1214 break;
1215 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1216 ret = 0;
1217 break;
1219 case PING_INFO_DATA:
1220 ret = ENOMEM;
1221 *buffer_len = strlen (iter->data);
1222 if (orig_buffer_len < *buffer_len)
1223 break;
1224 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1225 ret = 0;
1226 break;
1227 }
1229 return (ret);
1230 }
1232 void *ping_iterator_get_context (pingobj_iter_t *iter)
1233 {
1234 return (iter->context);
1235 }
1237 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1238 {
1239 iter->context = context;
1240 }