65b2ef529dd81cff07b7948f2d8f47eeb76e76c1
1 /**
2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2009 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 <stdint.h>
29 # include <inttypes.h>
30 # include <errno.h>
31 # include <assert.h>
32 #else
33 # error "You don't have the standard C99 header files installed"
34 #endif /* STDC_HEADERS */
36 #if HAVE_UNISTD_H
37 # include <unistd.h>
38 #endif
40 #if HAVE_FCNTL_H
41 # include <fcntl.h>
42 #endif
43 #if HAVE_SYS_TYPES_H
44 # include <sys/types.h>
45 #endif
46 #if HAVE_SYS_STAT_H
47 # include <sys/stat.h>
48 #endif
50 #if TIME_WITH_SYS_TIME
51 # include <sys/time.h>
52 # include <time.h>
53 #else
54 # if HAVE_SYS_TIME_H
55 # include <sys/time.h>
56 # else
57 # include <time.h>
58 # endif
59 #endif
61 #if HAVE_SYS_SOCKET_H
62 # include <sys/socket.h>
63 #endif
64 #if HAVE_NETDB_H
65 # include <netdb.h>
66 #endif
68 #if HAVE_NETINET_IN_SYSTM_H
69 # include <netinet/in_systm.h>
70 #endif
71 #if HAVE_NETINET_IN_H
72 # include <netinet/in.h>
73 #endif
74 #if HAVE_NETINET_IP_H
75 # include <netinet/ip.h>
76 #endif
77 #if HAVE_NETINET_IP_ICMP_H
78 # include <netinet/ip_icmp.h>
79 #endif
80 #ifdef HAVE_NETINET_IP_VAR_H
81 # include <netinet/ip_var.h>
82 #endif
83 #if HAVE_NETINET_IP6_H
84 # include <netinet/ip6.h>
85 #endif
86 #if HAVE_NETINET_ICMP6_H
87 # include <netinet/icmp6.h>
88 #endif
90 #include "oping.h"
92 #if WITH_DEBUG
93 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
94 #else
95 # define dprintf(...) /**/
96 #endif
98 #define PING_ERRMSG_LEN 256
100 struct pinghost
101 {
102 /* username: name passed in by the user */
103 char *username;
104 /* hostname: name returned by the reverse lookup */
105 char *hostname;
106 struct sockaddr_storage *addr;
107 socklen_t addrlen;
108 int addrfamily;
109 int fd;
110 int ident;
111 int sequence;
112 struct timeval *timer;
113 double latency;
114 uint32_t dropped;
115 int recv_ttl;
116 char *data;
118 void *context;
120 struct pinghost *next;
121 };
123 struct pingobj
124 {
125 double timeout;
126 int ttl;
127 int addrfamily;
128 char *data;
130 struct sockaddr *srcaddr;
131 socklen_t srcaddrlen;
133 char errmsg[PING_ERRMSG_LEN];
135 pinghost_t *head;
136 };
138 /*
139 * private (static) functions
140 */
141 /* Even though Posix requires "strerror_r" to return an "int",
142 * some systems (e.g. the GNU libc) return a "char *" _and_
143 * ignore the second argument ... -tokkee */
144 char *sstrerror (int errnum, char *buf, size_t buflen)
145 {
146 buf[0] = 0;
148 #if !HAVE_STRERROR_R
149 {
150 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
151 }
152 /* #endif !HAVE_STRERROR_R */
154 #elif STRERROR_R_CHAR_P
155 {
156 char *temp;
157 temp = strerror_r (errnum, buf, buflen);
158 if (buf[0] == 0)
159 {
160 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
161 strncpy (buf, temp, buflen);
162 else
163 strncpy (buf, "strerror_r did not return "
164 "an error message", buflen);
165 }
166 }
167 /* #endif STRERROR_R_CHAR_P */
169 #else
170 if (strerror_r (errnum, buf, buflen) != 0)
171 {
172 snprintf (buf, buflen, "Error %i (%#x); "
173 "Additionally, strerror_r failed.",
174 errnum, errnum);
175 }
176 #endif /* STRERROR_R_CHAR_P */
178 buf[buflen - 1] = 0;
180 return (buf);
181 } /* char *sstrerror */
183 static void ping_set_error (pingobj_t *obj, const char *function,
184 const char *message)
185 {
186 snprintf (obj->errmsg, sizeof (obj->errmsg),
187 "%s: %s", function, message);
188 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
189 }
191 static void ping_set_errno (pingobj_t *obj, int error_number)
192 {
193 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
194 }
196 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
197 struct timeval *res)
198 {
199 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
200 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
202 while (res->tv_usec > 1000000)
203 {
204 res->tv_usec -= 1000000;
205 res->tv_sec++;
206 }
208 return (0);
209 }
211 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
212 struct timeval *res)
213 {
214 if ((tv1->tv_sec < tv2->tv_sec)
215 || ((tv1->tv_sec == tv2->tv_sec)
216 && (tv1->tv_usec < tv2->tv_usec)))
217 return (-1);
219 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
220 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
222 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
224 while (res->tv_usec < 0)
225 {
226 res->tv_usec += 1000000;
227 res->tv_sec--;
228 }
230 return (0);
231 }
233 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
234 {
235 uint32_t sum = 0;
236 uint16_t ret = 0;
238 uint16_t *ptr;
240 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
241 sum += *ptr;
243 if (len == 1)
244 {
245 *(char *) &ret = *(char *) ptr;
246 sum += ret;
247 }
249 /* Do this twice to get all possible carries.. */
250 sum = (sum >> 16) + (sum & 0xFFFF);
251 sum = (sum >> 16) + (sum & 0xFFFF);
253 ret = ~sum;
255 return (ret);
256 }
258 static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len)
259 {
260 struct ip *ip_hdr;
261 struct icmp *icmp_hdr;
263 size_t ip_hdr_len;
265 uint16_t recv_checksum;
266 uint16_t calc_checksum;
268 uint16_t ident;
269 uint16_t seq;
271 pinghost_t *ptr;
273 if (buffer_len < sizeof (struct ip))
274 return (NULL);
276 ip_hdr = (struct ip *) buffer;
277 ip_hdr_len = ip_hdr->ip_hl << 2;
279 if (buffer_len < ip_hdr_len)
280 return (NULL);
282 buffer += ip_hdr_len;
283 buffer_len -= ip_hdr_len;
285 if (buffer_len < sizeof (struct icmp))
286 return (NULL);
288 icmp_hdr = (struct icmp *) buffer;
289 buffer += sizeof (struct icmp);
290 buffer_len -= sizeof (struct icmp);
292 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
293 {
294 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
295 return (NULL);
296 }
298 recv_checksum = icmp_hdr->icmp_cksum;
299 icmp_hdr->icmp_cksum = 0;
300 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
301 sizeof (struct icmp) + buffer_len);
303 if (recv_checksum != calc_checksum)
304 {
305 dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n",
306 recv_checksum, calc_checksum);
307 return (NULL);
308 }
310 ident = ntohs (icmp_hdr->icmp_id);
311 seq = ntohs (icmp_hdr->icmp_seq);
313 for (ptr = ph; ptr != NULL; ptr = ptr->next)
314 {
315 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
316 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
318 if (ptr->addrfamily != AF_INET)
319 continue;
321 if (!timerisset (ptr->timer))
322 continue;
324 if (ptr->ident != ident)
325 continue;
327 if (((ptr->sequence - 1) & 0xFFFF) != seq)
328 continue;
330 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
331 ptr->hostname, ident, seq);
333 break;
334 }
336 if (ptr == NULL)
337 {
338 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
339 ident, seq);
340 }
342 return (ptr);
343 }
345 #ifndef ICMP6_ECHO_REQUEST
346 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
347 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
348 # else
349 # define ICMP6_ECHO_REQUEST 128
350 # endif
351 #endif
353 #ifndef ICMP6_ECHO_REPLY
354 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
355 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
356 # else
357 # define ICMP6_ECHO_REPLY 129
358 # endif
359 #endif
361 static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len)
362 {
363 struct icmp6_hdr *icmp_hdr;
365 uint16_t ident;
366 uint16_t seq;
368 pinghost_t *ptr;
370 if (buffer_len < sizeof (struct icmp6_hdr))
371 return (NULL);
373 icmp_hdr = (struct icmp6_hdr *) buffer;
374 buffer += sizeof (struct icmp);
375 buffer_len -= sizeof (struct icmp);
377 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
378 {
379 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
380 return (NULL);
381 }
383 if (icmp_hdr->icmp6_code != 0)
384 {
385 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
386 return (NULL);
387 }
389 ident = ntohs (icmp_hdr->icmp6_id);
390 seq = ntohs (icmp_hdr->icmp6_seq);
392 for (ptr = ph; ptr != NULL; ptr = ptr->next)
393 {
394 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
395 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
397 if (ptr->addrfamily != AF_INET6)
398 continue;
400 if (!timerisset (ptr->timer))
401 continue;
403 if (ptr->ident != ident)
404 continue;
406 if (((ptr->sequence - 1) & 0xFFFF) != seq)
407 continue;
409 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
410 ptr->hostname, ident, seq);
412 break;
413 }
415 if (ptr == NULL)
416 {
417 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
418 ident, seq);
419 }
421 return (ptr);
422 }
424 static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now)
425 {
426 struct timeval diff;
427 pinghost_t *host = NULL;
428 int family;
429 int recv_ttl;
431 /*
432 * Set up the receive buffer..
433 */
434 struct msghdr msghdr;
435 struct cmsghdr *cmsg;
436 char payload_buffer[4096];
437 ssize_t payload_buffer_len;
438 char control_buffer[4096];
439 struct iovec payload_iovec;
441 memset (&payload_iovec, 0, sizeof (payload_iovec));
442 payload_iovec.iov_base = payload_buffer;
443 payload_iovec.iov_len = sizeof (payload_buffer);
445 memset (&msghdr, 0, sizeof (msghdr));
446 /* unspecified source address */
447 msghdr.msg_name = NULL;
448 msghdr.msg_namelen = 0;
449 /* output buffer vector, see readv(2) */
450 msghdr.msg_iov = &payload_iovec;
451 msghdr.msg_iovlen = 1;
452 /* output buffer for control messages */
453 msghdr.msg_control = control_buffer;
454 msghdr.msg_controllen = sizeof (control_buffer);
455 /* flags; this is an output only field.. */
456 msghdr.msg_flags = 0;
458 payload_buffer_len = recvmsg (fd, &msghdr, /* flags = */ 0);
459 if (payload_buffer_len < 0)
460 {
461 #if WITH_DEBUG
462 char errbuf[PING_ERRMSG_LEN];
463 dprintf ("recvfrom: %s\n",
464 sstrerror (errno, errbuf, sizeof (errbuf)));
465 #endif
466 return (-1);
467 }
468 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, fd);
470 /* Iterate over all auxiliary data in msghdr */
471 family = -1;
472 recv_ttl = -1;
473 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
474 cmsg != NULL;
475 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
476 {
477 if (cmsg->cmsg_level == IPPROTO_IP) /* {{{ */
478 {
479 family = AF_INET;
480 if (cmsg->cmsg_type == IP_TTL)
481 {
482 memcpy (&recv_ttl, CMSG_DATA (cmsg),
483 sizeof (recv_ttl));
484 dprintf ("TTLv4 = %i;\n", recv_ttl);
485 }
486 else
487 {
488 dprintf ("Not handling option %i.\n",
489 cmsg->cmsg_type);
490 }
491 } /* }}} */
492 else if (cmsg->cmsg_level == IPPROTO_IPV6) /* {{{ */
493 {
494 family = AF_INET6;
495 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
496 {
497 memcpy (&recv_ttl, CMSG_DATA (cmsg),
498 sizeof (recv_ttl));
499 dprintf ("TTLv6 = %i;\n", recv_ttl);
500 }
501 else
502 {
503 dprintf ("Not handling option %i.\n",
504 cmsg->cmsg_type);
505 }
506 } /* }}} */
507 else
508 {
509 dprintf ("Don't know how to handle "
510 "unknown protocol %i.\n",
511 cmsg->cmsg_level);
512 }
513 } /* }}} for (cmsg) */
515 if (family == AF_INET)
516 {
517 host = ping_receive_ipv4 (ph, payload_buffer, payload_buffer_len);
518 if (host == NULL)
519 return (-1);
520 }
521 else if (family == AF_INET6)
522 {
523 host = ping_receive_ipv6 (ph, payload_buffer, payload_buffer_len);
524 if (host == NULL)
525 return (-1);
526 }
527 else
528 {
529 dprintf ("ping_receive_one: Unknown address family %i.\n",
530 family);
531 return (-1);
532 }
534 dprintf ("rcvd: %12i.%06i\n",
535 (int) now->tv_sec,
536 (int) now->tv_usec);
537 dprintf ("sent: %12i.%06i\n",
538 (int) host->timer->tv_sec,
539 (int) host->timer->tv_usec);
541 if (ping_timeval_sub (now, host->timer, &diff) < 0)
542 {
543 timerclear (host->timer);
544 return (-1);
545 }
547 dprintf ("diff: %12i.%06i\n",
548 (int) diff.tv_sec,
549 (int) diff.tv_usec);
551 host->latency = ((double) diff.tv_usec) / 1000.0;
552 host->latency += ((double) diff.tv_sec) * 1000.0;
554 host->recv_ttl = recv_ttl;
556 timerclear (host->timer);
558 return (0);
559 }
561 static int ping_receive_all (pingobj_t *obj)
562 {
563 fd_set readfds;
564 int num_readfds;
565 int max_readfds;
567 pinghost_t *ph;
568 pinghost_t *ptr;
570 struct timeval endtime;
571 struct timeval nowtime;
572 struct timeval timeout;
573 int status;
575 int ret;
577 ph = obj->head;
578 ret = 0;
580 for (ptr = ph; ptr != NULL; ptr = ptr->next)
581 ptr->latency = -1.0;
583 if (gettimeofday (&nowtime, NULL) == -1)
584 {
585 ping_set_errno (obj, errno);
586 return (-1);
587 }
589 /* Set up timeout */
590 timeout.tv_sec = (time_t) obj->timeout;
591 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
593 dprintf ("Set timeout to %i.%06i seconds\n",
594 (int) timeout.tv_sec,
595 (int) timeout.tv_usec);
597 ping_timeval_add (&nowtime, &timeout, &endtime);
599 while (1)
600 {
601 FD_ZERO (&readfds);
602 num_readfds = 0;
603 max_readfds = -1;
605 for (ptr = ph; ptr != NULL; ptr = ptr->next)
606 {
607 if (!timerisset (ptr->timer))
608 continue;
610 FD_SET (ptr->fd, &readfds);
611 num_readfds++;
613 if (max_readfds < ptr->fd)
614 max_readfds = ptr->fd;
615 }
617 if (num_readfds == 0)
618 break;
620 if (gettimeofday (&nowtime, NULL) == -1)
621 {
622 ping_set_errno (obj, errno);
623 return (-1);
624 }
626 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
627 break;
629 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
630 (int) timeout.tv_sec,
631 (int) timeout.tv_usec);
633 status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
635 if (gettimeofday (&nowtime, NULL) == -1)
636 {
637 ping_set_errno (obj, errno);
638 return (-1);
639 }
641 if ((status == -1) && (errno == EINTR))
642 {
643 dprintf ("select was interrupted by signal..\n");
644 continue;
645 }
646 else if (status < 0)
647 {
648 #if WITH_DEBUG
649 char errbuf[PING_ERRMSG_LEN];
650 dprintf ("select: %s\n",
651 sstrerror (errno, errbuf, sizeof (errbuf)));
652 #endif
653 break;
654 }
655 else if (status == 0)
656 {
657 dprintf ("select timed out\n");
658 for (ptr = ph; ptr != NULL; ptr = ptr->next)
659 if (ptr->latency < 0.0)
660 ptr->dropped++;
661 break;
662 }
664 for (ptr = ph; ptr != NULL; ptr = ptr->next)
665 {
666 if (FD_ISSET (ptr->fd, &readfds))
667 if (ping_receive_one (ptr->fd, ph, &nowtime) == 0)
668 ret++;
669 }
670 } /* while (1) */
672 return (ret);
673 }
675 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
676 * Sending functions: *
677 * *
678 * ping_send_all *
679 * +-> ping_send_one_ipv4 *
680 * `-> ping_send_one_ipv6 *
681 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
682 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
683 const void *buf, size_t buflen)
684 {
685 ssize_t ret;
687 if (gettimeofday (ph->timer, NULL) == -1)
688 {
689 timerclear (ph->timer);
690 return (-1);
691 }
693 ret = sendto (ph->fd, buf, buflen, 0,
694 (struct sockaddr *) ph->addr, ph->addrlen);
696 if (ret < 0)
697 {
698 #if defined(EHOSTUNREACH)
699 if (errno == EHOSTUNREACH)
700 return (0);
701 #endif
702 #if defined(ENETUNREACH)
703 if (errno == ENETUNREACH)
704 return (0);
705 #endif
706 ping_set_errno (obj, errno);
707 }
709 return (ret);
710 }
712 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
713 {
714 struct icmp *icmp4;
715 int status;
717 char buf[4096];
718 int buflen;
720 char *data;
721 int datalen;
723 dprintf ("ph->hostname = %s\n", ph->hostname);
725 memset (buf, '\0', sizeof (buf));
726 icmp4 = (struct icmp *) buf;
727 data = (char *) (icmp4 + 1);
729 icmp4->icmp_type = ICMP_ECHO;
730 icmp4->icmp_code = 0;
731 icmp4->icmp_cksum = 0;
732 icmp4->icmp_id = htons (ph->ident);
733 icmp4->icmp_seq = htons (ph->sequence);
735 buflen = 4096 - sizeof (struct icmp);
736 strncpy (data, ph->data, buflen);
737 datalen = strlen (data);
739 buflen = datalen + sizeof (struct icmp);
741 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
743 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
745 status = ping_sendto (obj, ph, buf, buflen);
746 if (status < 0)
747 {
748 perror ("ping_sendto");
749 return (-1);
750 }
752 dprintf ("sendto: status = %i\n", status);
754 return (0);
755 }
757 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
758 {
759 struct icmp6_hdr *icmp6;
760 int status;
762 char buf[4096];
763 int buflen;
765 char *data;
766 int datalen;
768 dprintf ("ph->hostname = %s\n", ph->hostname);
770 memset (buf, '\0', sizeof (buf));
771 icmp6 = (struct icmp6_hdr *) buf;
772 data = (char *) (icmp6 + 1);
774 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
775 icmp6->icmp6_code = 0;
776 /* The checksum will be calculated by the TCP/IP stack. */
777 /* FIXME */
778 icmp6->icmp6_cksum = 0;
779 icmp6->icmp6_id = htons (ph->ident);
780 icmp6->icmp6_seq = htons (ph->sequence);
782 buflen = 4096 - sizeof (struct icmp6_hdr);
783 strncpy (data, ph->data, buflen);
784 datalen = strlen (data);
786 buflen = datalen + sizeof (struct icmp6_hdr);
788 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
790 status = ping_sendto (obj, ph, buf, buflen);
791 if (status < 0)
792 {
793 perror ("ping_sendto");
794 return (-1);
795 }
797 dprintf ("sendto: status = %i\n", status);
799 return (0);
800 }
802 static int ping_send_all (pingobj_t *obj)
803 {
804 pinghost_t *ph;
805 pinghost_t *ptr;
807 int ret;
809 ret = 0;
810 ph = obj->head;
812 for (ptr = ph; ptr != NULL; ptr = ptr->next)
813 {
814 /* start timer.. The GNU `ping6' starts the timer before
815 * sending the packet, so I will do that too */
816 if (gettimeofday (ptr->timer, NULL) == -1)
817 {
818 #if WITH_DEBUG
819 char errbuf[PING_ERRMSG_LEN];
820 dprintf ("gettimeofday: %s\n",
821 sstrerror (errno, errbuf, sizeof (errbuf)));
822 #endif
823 timerclear (ptr->timer);
824 ret--;
825 continue;
826 }
827 else
828 {
829 dprintf ("timer set for hostname = %s\n", ptr->hostname);
830 }
832 if (ptr->addrfamily == AF_INET6)
833 {
834 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
835 if (ping_send_one_ipv6 (obj, ptr) != 0)
836 {
837 timerclear (ptr->timer);
838 ret--;
839 continue;
840 }
841 }
842 else if (ptr->addrfamily == AF_INET)
843 {
844 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
845 if (ping_send_one_ipv4 (obj, ptr) != 0)
846 {
847 timerclear (ptr->timer);
848 ret--;
849 continue;
850 }
851 }
852 else /* this should not happen */
853 {
854 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
855 timerclear (ptr->timer);
856 ret--;
857 continue;
858 }
860 ptr->sequence++;
861 }
863 return (ret);
864 }
866 /*
867 * Set the TTL of a socket protocol independently.
868 */
869 static int ping_set_ttl (pinghost_t *ph, int ttl)
870 {
871 int ret = -2;
873 if (ph->addrfamily == AF_INET)
874 {
875 dprintf ("Setting TTLv4 to %i\n", ttl);
876 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
877 &ttl, sizeof (ttl));
878 }
879 else if (ph->addrfamily == AF_INET6)
880 {
881 dprintf ("Setting TTLv6 to %i\n", ttl);
882 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
883 &ttl, sizeof (ttl));
884 }
886 return (ret);
887 }
889 static int ping_get_ident (void)
890 {
891 int fd;
892 static int did_seed = 0;
894 int retval;
896 if (did_seed == 0)
897 {
898 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
899 {
900 unsigned int seed;
902 if (read (fd, &seed, sizeof (seed)) != -1)
903 {
904 did_seed = 1;
905 dprintf ("Random seed: %#x\n", seed);
906 srandom (seed);
907 }
909 close (fd);
910 }
911 #if WITH_DEBUG
912 else
913 {
914 char errbuf[PING_ERRMSG_LEN];
915 dprintf ("open (/dev/urandom): %s\n",
916 sstrerror (errno, errbuf, sizeof (errbuf)));
917 }
918 #endif
919 }
921 retval = (int) random ();
923 dprintf ("Random number: %#x\n", retval);
925 return (retval);
926 }
928 static pinghost_t *ping_alloc (void)
929 {
930 pinghost_t *ph;
931 size_t ph_size;
933 ph_size = sizeof (pinghost_t)
934 + sizeof (struct sockaddr_storage)
935 + sizeof (struct timeval);
937 ph = (pinghost_t *) malloc (ph_size);
938 if (ph == NULL)
939 return (NULL);
941 memset (ph, '\0', ph_size);
943 ph->timer = (struct timeval *) (ph + 1);
944 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
946 ph->addrlen = sizeof (struct sockaddr_storage);
947 ph->fd = -1;
948 ph->latency = -1.0;
949 ph->dropped = 0;
950 ph->ident = ping_get_ident () & 0xFFFF;
952 return (ph);
953 }
955 static void ping_free (pinghost_t *ph)
956 {
957 if (ph->fd >= 0)
958 close (ph->fd);
960 if (ph->username != NULL)
961 free (ph->username);
963 if (ph->hostname != NULL)
964 free (ph->hostname);
966 if (ph->data != NULL)
967 free (ph->data);
969 free (ph);
970 }
972 /*
973 * public methods
974 */
975 const char *ping_get_error (pingobj_t *obj)
976 {
977 return (obj->errmsg);
978 }
980 pingobj_t *ping_construct (void)
981 {
982 pingobj_t *obj;
984 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
985 return (NULL);
986 memset (obj, '\0', sizeof (pingobj_t));
988 obj->timeout = PING_DEF_TIMEOUT;
989 obj->ttl = PING_DEF_TTL;
990 obj->addrfamily = PING_DEF_AF;
991 obj->data = strdup (PING_DEF_DATA);
993 return (obj);
994 }
996 void ping_destroy (pingobj_t *obj)
997 {
998 pinghost_t *current;
999 pinghost_t *next;
1001 current = obj->head;
1002 next = NULL;
1004 while (current != NULL)
1005 {
1006 next = current->next;
1007 ping_free (current);
1008 current = next;
1009 }
1011 if (obj->data != NULL)
1012 free (obj->data);
1014 if (obj->srcaddr != NULL)
1015 free (obj->srcaddr);
1017 free (obj);
1019 return;
1020 }
1022 int ping_setopt (pingobj_t *obj, int option, void *value)
1023 {
1024 int ret = 0;
1026 switch (option)
1027 {
1028 case PING_OPT_TIMEOUT:
1029 obj->timeout = *((double *) value);
1030 if (obj->timeout < 0.0)
1031 {
1032 obj->timeout = PING_DEF_TIMEOUT;
1033 ret = -1;
1034 }
1035 break;
1037 case PING_OPT_TTL:
1038 obj->ttl = *((int *) value);
1039 if ((obj->ttl < 1) || (obj->ttl > 255))
1040 {
1041 obj->ttl = PING_DEF_TTL;
1042 ret = -1;
1043 }
1044 break;
1046 case PING_OPT_AF:
1047 obj->addrfamily = *((int *) value);
1048 if ((obj->addrfamily != AF_UNSPEC)
1049 && (obj->addrfamily != AF_INET)
1050 && (obj->addrfamily != AF_INET6))
1051 {
1052 obj->addrfamily = PING_DEF_AF;
1053 ret = -1;
1054 }
1055 if (obj->srcaddr != NULL)
1056 {
1057 free (obj->srcaddr);
1058 obj->srcaddr = NULL;
1059 }
1060 break;
1062 case PING_OPT_DATA:
1063 if (obj->data != NULL)
1064 {
1065 free (obj->data);
1066 obj->data = NULL;
1067 }
1068 obj->data = strdup ((const char *) value);
1069 break;
1071 case PING_OPT_SOURCE:
1072 {
1073 char *hostname = (char *) value;
1074 struct addrinfo ai_hints;
1075 struct addrinfo *ai_list;
1076 int status;
1077 #if WITH_DEBUG
1078 if (obj->addrfamily != AF_UNSPEC)
1079 {
1080 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1081 }
1082 #endif
1083 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1084 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1085 #if defined(AI_ADDRCONFIG)
1086 ai_hints.ai_flags = AI_ADDRCONFIG;
1087 #endif
1088 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1089 if (status != 0)
1090 {
1091 #if defined(EAI_SYSTEM)
1092 char errbuf[PING_ERRMSG_LEN];
1093 #endif
1094 ping_set_error (obj, "getaddrinfo",
1095 #if defined(EAI_SYSTEM)
1096 (status == EAI_SYSTEM)
1097 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1098 #endif
1099 gai_strerror (status));
1100 ret = -1;
1101 break;
1102 }
1103 #if WITH_DEBUG
1104 if (ai_list->ai_next != NULL)
1105 {
1106 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1107 }
1108 #endif
1109 if (obj->srcaddr == NULL)
1110 {
1111 obj->srcaddrlen = 0;
1112 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1113 if (obj->srcaddr == NULL)
1114 {
1115 ping_set_errno (obj, errno);
1116 ret = -1;
1117 freeaddrinfo (ai_list);
1118 break;
1119 }
1120 }
1121 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1122 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1123 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1124 ai_list->ai_addrlen);
1125 obj->srcaddrlen = ai_list->ai_addrlen;
1126 obj->addrfamily = ai_list->ai_family;
1128 freeaddrinfo (ai_list);
1129 } /* case PING_OPT_SOURCE */
1130 break;
1132 default:
1133 ret = -2;
1134 } /* switch (option) */
1136 return (ret);
1137 } /* int ping_setopt */
1140 int ping_send (pingobj_t *obj)
1141 {
1142 int ret;
1144 if (ping_send_all (obj) < 0)
1145 return (-1);
1147 if ((ret = ping_receive_all (obj)) < 0)
1148 return (-2);
1150 return (ret);
1151 }
1153 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1154 {
1155 while (ph != NULL)
1156 {
1157 if (strcasecmp (ph->username, host) == 0)
1158 break;
1160 ph = ph->next;
1161 }
1163 return (ph);
1164 }
1166 int ping_host_add (pingobj_t *obj, const char *host)
1167 {
1168 pinghost_t *ph;
1170 struct addrinfo ai_hints;
1171 struct addrinfo *ai_list, *ai_ptr;
1172 int ai_return;
1174 dprintf ("host = %s\n", host);
1176 if (ping_host_search (obj->head, host) != NULL)
1177 return (0);
1179 memset (&ai_hints, '\0', sizeof (ai_hints));
1180 ai_hints.ai_flags = 0;
1181 #ifdef AI_ADDRCONFIG
1182 ai_hints.ai_flags |= AI_ADDRCONFIG;
1183 #endif
1184 #ifdef AI_CANONNAME
1185 ai_hints.ai_flags |= AI_CANONNAME;
1186 #endif
1187 ai_hints.ai_family = obj->addrfamily;
1188 ai_hints.ai_socktype = SOCK_RAW;
1190 if ((ph = ping_alloc ()) == NULL)
1191 {
1192 dprintf ("Out of memory!\n");
1193 return (-1);
1194 }
1196 if ((ph->username = strdup (host)) == NULL)
1197 {
1198 dprintf ("Out of memory!\n");
1199 ping_set_errno (obj, errno);
1200 ping_free (ph);
1201 return (-1);
1202 }
1204 if ((ph->hostname = strdup (host)) == NULL)
1205 {
1206 dprintf ("Out of memory!\n");
1207 ping_set_errno (obj, errno);
1208 ping_free (ph);
1209 return (-1);
1210 }
1212 /* obj->data is not garuanteed to be != NULL */
1213 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1214 {
1215 dprintf ("Out of memory!\n");
1216 ping_set_errno (obj, errno);
1217 ping_free (ph);
1218 return (-1);
1219 }
1221 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1222 {
1223 #if defined(EAI_SYSTEM)
1224 char errbuf[PING_ERRMSG_LEN];
1225 #endif
1226 dprintf ("getaddrinfo failed\n");
1227 ping_set_error (obj, "getaddrinfo",
1228 #if defined(EAI_SYSTEM)
1229 (ai_return == EAI_SYSTEM)
1230 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1231 #endif
1232 gai_strerror (ai_return));
1233 ping_free (ph);
1234 return (-1);
1235 }
1237 if (ai_list == NULL)
1238 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1240 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1241 {
1242 ph->fd = -1;
1244 if (ai_ptr->ai_family == AF_INET)
1245 {
1246 ai_ptr->ai_socktype = SOCK_RAW;
1247 ai_ptr->ai_protocol = IPPROTO_ICMP;
1248 }
1249 else if (ai_ptr->ai_family == AF_INET6)
1250 {
1251 ai_ptr->ai_socktype = SOCK_RAW;
1252 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1253 }
1254 else
1255 {
1256 char errmsg[PING_ERRMSG_LEN];
1258 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1259 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1261 dprintf (errmsg);
1262 ping_set_error (obj, "getaddrinfo", errmsg);
1263 continue;
1264 }
1266 /* TODO: Move this to a static function `ping_open_socket' and
1267 * call it whenever the socket dies. */
1268 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1269 if (ph->fd == -1)
1270 {
1271 #if WITH_DEBUG
1272 char errbuf[PING_ERRMSG_LEN];
1273 dprintf ("socket: %s\n",
1274 sstrerror (errno, errbuf, sizeof (errbuf)));
1275 #endif
1276 ping_set_errno (obj, errno);
1277 continue;
1278 }
1280 if (obj->srcaddr != NULL)
1281 {
1282 assert (obj->srcaddrlen > 0);
1283 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1285 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1286 {
1287 #if WITH_DEBUG
1288 char errbuf[PING_ERRMSG_LEN];
1289 dprintf ("bind: %s\n",
1290 sstrerror (errno, errbuf, sizeof (errbuf)));
1291 #endif
1292 ping_set_errno (obj, errno);
1293 close (ph->fd);
1294 ph->fd = -1;
1295 continue;
1296 }
1297 }
1299 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1300 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1301 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1302 ph->addrlen = ai_ptr->ai_addrlen;
1303 ph->addrfamily = ai_ptr->ai_family;
1305 #ifdef AI_CANONNAME
1306 if ((ai_ptr->ai_canonname != NULL)
1307 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1308 {
1309 char *old_hostname;
1311 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1312 ph->hostname, ai_ptr->ai_canonname);
1314 old_hostname = ph->hostname;
1315 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1316 {
1317 /* strdup failed, falling back to old hostname */
1318 ph->hostname = old_hostname;
1319 }
1320 else if (old_hostname != NULL)
1321 {
1322 free (old_hostname);
1323 }
1324 }
1325 #endif /* AI_CANONNAME */
1327 if (ph->addrfamily == AF_INET)
1328 {
1329 int opt = 1;
1331 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1332 &opt, sizeof (opt));
1333 }
1334 else if (ph->addrfamily == AF_INET6)
1335 {
1336 int opt = 1;
1338 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1339 &opt, sizeof (opt));
1340 }
1342 break;
1343 }
1345 freeaddrinfo (ai_list);
1347 if (ph->fd < 0)
1348 {
1349 ping_free (ph);
1350 return (-1);
1351 }
1353 /*
1354 * Adding in the front is much easier, but then the iterator will
1355 * return the host that was added last as first host. That's just not
1356 * nice. -octo
1357 */
1358 if (obj->head == NULL)
1359 {
1360 obj->head = ph;
1361 }
1362 else
1363 {
1364 pinghost_t *hptr;
1366 hptr = obj->head;
1367 while (hptr->next != NULL)
1368 hptr = hptr->next;
1370 assert ((hptr != NULL) && (hptr->next == NULL));
1371 hptr->next = ph;
1372 }
1374 ping_set_ttl (ph, obj->ttl);
1376 return (0);
1377 } /* int ping_host_add */
1379 int ping_host_remove (pingobj_t *obj, const char *host)
1380 {
1381 pinghost_t *pre, *cur;
1383 pre = NULL;
1384 cur = obj->head;
1386 while (cur != NULL)
1387 {
1388 if (strcasecmp (host, cur->username) == 0)
1389 break;
1391 pre = cur;
1392 cur = cur->next;
1393 }
1395 if (cur == NULL)
1396 {
1397 ping_set_error (obj, "ping_host_remove", "Host not found");
1398 return (-1);
1399 }
1401 if (pre == NULL)
1402 obj->head = cur->next;
1403 else
1404 pre->next = cur->next;
1406 ping_free (cur);
1408 return (0);
1409 }
1411 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1412 {
1413 return ((pingobj_iter_t *) obj->head);
1414 }
1416 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1417 {
1418 return ((pingobj_iter_t *) iter->next);
1419 }
1421 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1422 void *buffer, size_t *buffer_len)
1423 {
1424 int ret = EINVAL;
1426 size_t orig_buffer_len = *buffer_len;
1428 switch (info)
1429 {
1430 case PING_INFO_USERNAME:
1431 ret = ENOMEM;
1432 *buffer_len = strlen (iter->username) + 1;
1433 if (orig_buffer_len <= *buffer_len)
1434 break;
1435 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1436 * will copy `*buffer_len' and pad the rest of
1437 * `buffer' with null-bytes */
1438 strncpy (buffer, iter->username, orig_buffer_len);
1439 ret = 0;
1440 break;
1442 case PING_INFO_HOSTNAME:
1443 ret = ENOMEM;
1444 *buffer_len = strlen (iter->hostname) + 1;
1445 if (orig_buffer_len < *buffer_len)
1446 break;
1447 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1448 * will copy `*buffer_len' and pad the rest of
1449 * `buffer' with null-bytes */
1450 strncpy (buffer, iter->hostname, orig_buffer_len);
1451 ret = 0;
1452 break;
1454 case PING_INFO_ADDRESS:
1455 ret = getnameinfo ((struct sockaddr *) iter->addr,
1456 iter->addrlen,
1457 (char *) buffer,
1458 *buffer_len,
1459 NULL, 0,
1460 NI_NUMERICHOST);
1461 if (ret != 0)
1462 {
1463 if ((ret == EAI_MEMORY)
1464 #ifdef EAI_OVERFLOW
1465 || (ret == EAI_OVERFLOW)
1466 #endif
1467 )
1468 ret = ENOMEM;
1469 #if defined(EAI_SYSTEM)
1470 else if (ret == EAI_SYSTEM)
1471 ret = errno;
1472 #endif
1473 else
1474 ret = EINVAL;
1475 }
1476 break;
1478 case PING_INFO_FAMILY:
1479 ret = ENOMEM;
1480 *buffer_len = sizeof (int);
1481 if (orig_buffer_len < sizeof (int))
1482 break;
1483 *((int *) buffer) = iter->addrfamily;
1484 ret = 0;
1485 break;
1487 case PING_INFO_LATENCY:
1488 ret = ENOMEM;
1489 *buffer_len = sizeof (double);
1490 if (orig_buffer_len < sizeof (double))
1491 break;
1492 *((double *) buffer) = iter->latency;
1493 ret = 0;
1494 break;
1496 case PING_INFO_DROPPED:
1497 ret = ENOMEM;
1498 *buffer_len = sizeof (uint32_t);
1499 if (orig_buffer_len < sizeof (uint32_t))
1500 break;
1501 *((uint32_t *) buffer) = iter->dropped;
1502 ret = 0;
1503 break;
1505 case PING_INFO_SEQUENCE:
1506 ret = ENOMEM;
1507 *buffer_len = sizeof (unsigned int);
1508 if (orig_buffer_len < sizeof (unsigned int))
1509 break;
1510 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1511 ret = 0;
1512 break;
1514 case PING_INFO_IDENT:
1515 ret = ENOMEM;
1516 *buffer_len = sizeof (uint16_t);
1517 if (orig_buffer_len < sizeof (uint16_t))
1518 break;
1519 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1520 ret = 0;
1521 break;
1523 case PING_INFO_DATA:
1524 ret = ENOMEM;
1525 *buffer_len = strlen (iter->data);
1526 if (orig_buffer_len < *buffer_len)
1527 break;
1528 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1529 ret = 0;
1530 break;
1532 case PING_INFO_RECV_TTL:
1533 ret = ENOMEM;
1534 *buffer_len = sizeof (int);
1535 if (orig_buffer_len < sizeof (int))
1536 break;
1537 *((int *) buffer) = iter->recv_ttl;
1538 ret = 0;
1539 break;
1540 }
1542 return (ret);
1543 } /* ping_iterator_get_info */
1545 void *ping_iterator_get_context (pingobj_iter_t *iter)
1546 {
1547 return (iter->context);
1548 }
1550 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1551 {
1552 iter->context = context;
1553 }