beef4f56cd0a2e726b2d4288f5583c63476388df
1 /**
2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2011 Florian octo Forster <ff at octo.it>
4 *
5 * This library is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU Lesser General Public License as published by the
7 * Free Software Foundation; either version 2.1 of the License, or (at your
8 * option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
13 * for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin Street, 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 <inttypes.h>
29 # include <errno.h>
30 # include <assert.h>
31 #else
32 # error "You don't have the standard C99 header files installed"
33 #endif /* STDC_HEADERS */
35 #ifdef HAVE_STDINT_H
36 # include <stdint.h>
37 #endif
39 #if HAVE_UNISTD_H
40 # include <unistd.h>
41 #endif
43 #if HAVE_FCNTL_H
44 # include <fcntl.h>
45 #endif
46 #if HAVE_SYS_TYPES_H
47 # include <sys/types.h>
48 #endif
49 #if HAVE_SYS_STAT_H
50 # include <sys/stat.h>
51 #endif
53 #if TIME_WITH_SYS_TIME
54 # include <sys/time.h>
55 # include <time.h>
56 #else
57 # if HAVE_SYS_TIME_H
58 # include <sys/time.h>
59 # else
60 # include <time.h>
61 # endif
62 #endif
64 #if HAVE_SYS_SOCKET_H
65 # include <sys/socket.h>
66 #endif
68 #if HAVE_NETDB_H
69 # include <netdb.h>
70 #endif
72 #if HAVE_NETINET_IN_SYSTM_H
73 # include <netinet/in_systm.h>
74 #endif
75 #if HAVE_NETINET_IN_H
76 # include <netinet/in.h>
77 #endif
78 #if HAVE_NETINET_IP_H
79 # include <netinet/ip.h>
80 #endif
81 #if HAVE_NETINET_IP_ICMP_H
82 # include <netinet/ip_icmp.h>
83 #endif
84 #ifdef HAVE_NETINET_IP_VAR_H
85 # include <netinet/ip_var.h>
86 #endif
87 #if HAVE_NETINET_IP6_H
88 # include <netinet/ip6.h>
89 #endif
90 #if HAVE_NETINET_ICMP6_H
91 # include <netinet/icmp6.h>
92 #endif
94 #include "oping.h"
96 #if WITH_DEBUG
97 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
98 #else
99 # define dprintf(...) /**/
100 #endif
102 #define PING_ERRMSG_LEN 256
104 struct pinghost
105 {
106 /* username: name passed in by the user */
107 char *username;
108 /* hostname: name returned by the reverse lookup */
109 char *hostname;
110 struct sockaddr_storage *addr;
111 socklen_t addrlen;
112 int addrfamily;
113 int fd;
114 int ident;
115 int sequence;
116 struct timeval *timer;
117 double latency;
118 uint32_t dropped;
119 int recv_ttl;
120 uint8_t recv_qos;
121 char *data;
123 void *context;
125 struct pinghost *next;
126 };
128 struct pingobj
129 {
130 double timeout;
131 int ttl;
132 int addrfamily;
133 uint8_t qos;
134 char *data;
136 struct sockaddr *srcaddr;
137 socklen_t srcaddrlen;
139 char *device;
141 char errmsg[PING_ERRMSG_LEN];
143 pinghost_t *head;
144 };
146 /*
147 * private (static) functions
148 */
149 /* Even though Posix requires "strerror_r" to return an "int",
150 * some systems (e.g. the GNU libc) return a "char *" _and_
151 * ignore the second argument ... -tokkee */
152 static char *sstrerror (int errnum, char *buf, size_t buflen)
153 {
154 buf[0] = 0;
156 #if !HAVE_STRERROR_R
157 {
158 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
159 }
160 /* #endif !HAVE_STRERROR_R */
162 #elif STRERROR_R_CHAR_P
163 {
164 char *temp;
165 temp = strerror_r (errnum, buf, buflen);
166 if (buf[0] == 0)
167 {
168 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
169 strncpy (buf, temp, buflen);
170 else
171 strncpy (buf, "strerror_r did not return "
172 "an error message", buflen);
173 }
174 }
175 /* #endif STRERROR_R_CHAR_P */
177 #else
178 if (strerror_r (errnum, buf, buflen) != 0)
179 {
180 snprintf (buf, buflen, "Error %i (%#x); "
181 "Additionally, strerror_r failed.",
182 errnum, errnum);
183 }
184 #endif /* STRERROR_R_CHAR_P */
186 buf[buflen - 1] = 0;
188 return (buf);
189 } /* char *sstrerror */
191 static void ping_set_error (pingobj_t *obj, const char *function,
192 const char *message)
193 {
194 snprintf (obj->errmsg, sizeof (obj->errmsg),
195 "%s: %s", function, message);
196 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
197 }
199 static void ping_set_errno (pingobj_t *obj, int error_number)
200 {
201 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
202 }
204 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
205 struct timeval *res)
206 {
207 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
208 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
210 while (res->tv_usec > 1000000)
211 {
212 res->tv_usec -= 1000000;
213 res->tv_sec++;
214 }
216 return (0);
217 }
219 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
220 struct timeval *res)
221 {
222 if ((tv1->tv_sec < tv2->tv_sec)
223 || ((tv1->tv_sec == tv2->tv_sec)
224 && (tv1->tv_usec < tv2->tv_usec)))
225 return (-1);
227 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
228 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
230 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
232 while (res->tv_usec < 0)
233 {
234 res->tv_usec += 1000000;
235 res->tv_sec--;
236 }
238 return (0);
239 }
241 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
242 {
243 uint32_t sum = 0;
244 uint16_t ret = 0;
246 uint16_t *ptr;
248 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
249 sum += *ptr;
251 if (len == 1)
252 {
253 *(char *) &ret = *(char *) ptr;
254 sum += ret;
255 }
257 /* Do this twice to get all possible carries.. */
258 sum = (sum >> 16) + (sum & 0xFFFF);
259 sum = (sum >> 16) + (sum & 0xFFFF);
261 ret = ~sum;
263 return (ret);
264 }
266 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
267 size_t buffer_len)
268 {
269 struct ip *ip_hdr;
270 struct icmp *icmp_hdr;
272 size_t ip_hdr_len;
274 uint16_t recv_checksum;
275 uint16_t calc_checksum;
277 uint16_t ident;
278 uint16_t seq;
280 pinghost_t *ptr;
282 if (buffer_len < sizeof (struct ip))
283 return (NULL);
285 ip_hdr = (struct ip *) buffer;
286 ip_hdr_len = ip_hdr->ip_hl << 2;
288 if (buffer_len < ip_hdr_len)
289 return (NULL);
291 buffer += ip_hdr_len;
292 buffer_len -= ip_hdr_len;
294 if (buffer_len < sizeof (struct icmp))
295 return (NULL);
297 icmp_hdr = (struct icmp *) buffer;
298 buffer += sizeof (struct icmp);
299 buffer_len -= sizeof (struct icmp);
301 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
302 {
303 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
304 return (NULL);
305 }
307 recv_checksum = icmp_hdr->icmp_cksum;
308 icmp_hdr->icmp_cksum = 0;
309 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
310 sizeof (struct icmp) + buffer_len);
312 if (recv_checksum != calc_checksum)
313 {
314 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
315 "calculated 0x%04"PRIx16"\n",
316 recv_checksum, calc_checksum);
317 return (NULL);
318 }
320 ident = ntohs (icmp_hdr->icmp_id);
321 seq = ntohs (icmp_hdr->icmp_seq);
323 /* We have to iterate over all hosts, since ICMPv4 packets may
324 * be received on any raw v4 socket. */
325 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
326 {
327 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
328 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
330 if (ptr->addrfamily != AF_INET)
331 continue;
333 if (!timerisset (ptr->timer))
334 continue;
336 if (ptr->ident != ident)
337 continue;
339 if (((ptr->sequence - 1) & 0xFFFF) != seq)
340 continue;
342 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
343 "seq = %"PRIu16"\n",
344 ptr->hostname, ident, seq);
346 break;
347 }
349 if (ptr == NULL)
350 {
351 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
352 ident, seq);
353 }
355 if (ptr != NULL){
356 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
357 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
358 }
359 return (ptr);
360 }
362 #ifndef ICMP6_ECHO_REQUEST
363 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
364 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
365 # else
366 # define ICMP6_ECHO_REQUEST 128
367 # endif
368 #endif
370 #ifndef ICMP6_ECHO_REPLY
371 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
372 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
373 # else
374 # define ICMP6_ECHO_REPLY 129
375 # endif
376 #endif
378 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
379 size_t buffer_len)
380 {
381 struct icmp6_hdr *icmp_hdr;
383 uint16_t ident;
384 uint16_t seq;
386 pinghost_t *ptr;
388 if (buffer_len < sizeof (struct icmp6_hdr))
389 return (NULL);
391 icmp_hdr = (struct icmp6_hdr *) buffer;
392 buffer += sizeof (struct icmp);
393 buffer_len -= sizeof (struct icmp);
395 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
396 {
397 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
398 return (NULL);
399 }
401 if (icmp_hdr->icmp6_code != 0)
402 {
403 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
404 return (NULL);
405 }
407 ident = ntohs (icmp_hdr->icmp6_id);
408 seq = ntohs (icmp_hdr->icmp6_seq);
410 /* We have to iterate over all hosts, since ICMPv6 packets may
411 * be received on any raw v6 socket. */
412 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
413 {
414 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
415 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
417 if (ptr->addrfamily != AF_INET6)
418 continue;
420 if (!timerisset (ptr->timer))
421 continue;
423 if (ptr->ident != ident)
424 continue;
426 if (((ptr->sequence - 1) & 0xFFFF) != seq)
427 continue;
429 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
430 "seq = %"PRIu16"\n",
431 ptr->hostname, ident, seq);
433 break;
434 }
436 if (ptr == NULL)
437 {
438 dprintf ("No match found for ident = 0x%04"PRIx16", "
439 "seq = %"PRIu16"\n",
440 ident, seq);
441 }
443 return (ptr);
444 }
446 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
447 struct timeval *now)
448 {
449 /* Note: 'ph' is not necessarily the host object for which we receive a
450 * reply. The right object will be returned by ping_receive_ipv*(). For
451 * now, we can only rely on ph->fd and ph->addrfamily. */
453 struct timeval diff, pkt_now = *now;
454 pinghost_t *host = NULL;
455 int recv_ttl;
456 uint8_t recv_qos;
458 /*
459 * Set up the receive buffer..
460 */
461 struct msghdr msghdr;
462 struct cmsghdr *cmsg;
463 char payload_buffer[4096];
464 ssize_t payload_buffer_len;
465 char control_buffer[4096];
466 struct iovec payload_iovec;
468 memset (&payload_iovec, 0, sizeof (payload_iovec));
469 payload_iovec.iov_base = payload_buffer;
470 payload_iovec.iov_len = sizeof (payload_buffer);
472 memset (&msghdr, 0, sizeof (msghdr));
473 /* unspecified source address */
474 msghdr.msg_name = NULL;
475 msghdr.msg_namelen = 0;
476 /* output buffer vector, see readv(2) */
477 msghdr.msg_iov = &payload_iovec;
478 msghdr.msg_iovlen = 1;
479 /* output buffer for control messages */
480 msghdr.msg_control = control_buffer;
481 msghdr.msg_controllen = sizeof (control_buffer);
482 /* flags; this is an output only field.. */
483 msghdr.msg_flags = 0;
484 #ifdef MSG_XPG4_2
485 msghdr.msg_flags |= MSG_XPG4_2;
486 #endif
488 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
489 if (payload_buffer_len < 0)
490 {
491 #if WITH_DEBUG
492 char errbuf[PING_ERRMSG_LEN];
493 dprintf ("recvfrom: %s\n",
494 sstrerror (errno, errbuf, sizeof (errbuf)));
495 #endif
496 return (-1);
497 }
498 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
500 /* Iterate over all auxiliary data in msghdr */
501 recv_ttl = -1;
502 recv_qos = 0;
503 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
504 cmsg != NULL;
505 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
506 {
507 if (cmsg->cmsg_level == SOL_SOCKET)
508 {
509 #ifdef SO_TIMESTAMP
510 if (cmsg->cmsg_type == SO_TIMESTAMP)
511 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
512 #endif /* SO_TIMESTAMP */
513 }
514 else if (ph->addrfamily == AF_INET) /* {{{ */
515 {
516 if (cmsg->cmsg_level != IPPROTO_IP)
517 continue;
519 if (cmsg->cmsg_type == IP_TOS)
520 {
521 memcpy (&recv_qos, CMSG_DATA (cmsg),
522 sizeof (recv_qos));
523 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
524 } else
525 if (cmsg->cmsg_type == IP_TTL)
526 {
527 memcpy (&recv_ttl, CMSG_DATA (cmsg),
528 sizeof (recv_ttl));
529 dprintf ("TTLv4 = %i;\n", recv_ttl);
530 }
531 else
532 {
533 dprintf ("Not handling option %i.\n",
534 cmsg->cmsg_type);
535 }
536 } /* }}} */
537 else if (ph->addrfamily == AF_INET6) /* {{{ */
538 {
539 if (cmsg->cmsg_level != IPPROTO_IPV6)
540 continue;
542 if (cmsg->cmsg_type == IPV6_TCLASS)
543 {
544 memcpy (&recv_qos, CMSG_DATA (cmsg),
545 sizeof (recv_qos));
546 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
547 } else
548 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
549 {
550 memcpy (&recv_ttl, CMSG_DATA (cmsg),
551 sizeof (recv_ttl));
552 dprintf ("TTLv6 = %i;\n", recv_ttl);
553 }
554 else
555 {
556 dprintf ("Not handling option %i.\n",
557 cmsg->cmsg_type);
558 }
559 } /* }}} */
560 else
561 {
562 dprintf ("Don't know how to handle "
563 "unknown protocol %i.\n",
564 cmsg->cmsg_level);
565 }
566 } /* }}} for (cmsg) */
568 if (ph->addrfamily == AF_INET)
569 {
570 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
571 if (host == NULL)
572 return (-1);
573 }
574 else if (ph->addrfamily == AF_INET6)
575 {
576 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
577 if (host == NULL)
578 return (-1);
579 }
580 else
581 {
582 dprintf ("ping_receive_one: Unknown address family %i.\n",
583 ph->addrfamily);
584 return (-1);
585 }
587 dprintf ("rcvd: %12i.%06i\n",
588 (int) pkt_now.tv_sec,
589 (int) pkt_now.tv_usec);
590 dprintf ("sent: %12i.%06i\n",
591 (int) host->timer->tv_sec,
592 (int) host->timer->tv_usec);
594 if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
595 {
596 timerclear (host->timer);
597 return (-1);
598 }
600 dprintf ("diff: %12i.%06i\n",
601 (int) diff.tv_sec,
602 (int) diff.tv_usec);
604 if (recv_ttl >= 0)
605 host->recv_ttl = recv_ttl;
606 host->recv_qos = recv_qos;
608 host->latency = ((double) diff.tv_usec) / 1000.0;
609 host->latency += ((double) diff.tv_sec) * 1000.0;
611 timerclear (host->timer);
613 return (0);
614 }
616 static int ping_receive_all (pingobj_t *obj)
617 {
618 fd_set read_fds;
619 fd_set err_fds;
620 int num_fds;
621 int max_fd;
623 pinghost_t *ph;
624 pinghost_t *ptr;
626 struct timeval endtime;
627 struct timeval nowtime;
628 struct timeval timeout;
629 int status;
631 int ret;
633 ph = obj->head;
634 ret = 0;
636 for (ptr = ph; ptr != NULL; ptr = ptr->next)
637 {
638 ptr->latency = -1.0;
639 ptr->recv_ttl = -1;
640 }
642 if (gettimeofday (&nowtime, NULL) == -1)
643 {
644 ping_set_errno (obj, errno);
645 return (-1);
646 }
648 /* Set up timeout */
649 timeout.tv_sec = (time_t) obj->timeout;
650 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
652 dprintf ("Set timeout to %i.%06i seconds\n",
653 (int) timeout.tv_sec,
654 (int) timeout.tv_usec);
656 ping_timeval_add (&nowtime, &timeout, &endtime);
658 while (1)
659 {
660 FD_ZERO (&read_fds);
661 FD_ZERO (&err_fds);
662 num_fds = 0;
663 max_fd = -1;
665 for (ptr = ph; ptr != NULL; ptr = ptr->next)
666 {
667 if (!timerisset (ptr->timer))
668 continue;
670 FD_SET (ptr->fd, &read_fds);
671 FD_SET (ptr->fd, &err_fds);
672 num_fds++;
674 if (max_fd < ptr->fd)
675 max_fd = ptr->fd;
676 }
678 if (num_fds == 0)
679 break;
681 if (gettimeofday (&nowtime, NULL) == -1)
682 {
683 ping_set_errno (obj, errno);
684 return (-1);
685 }
687 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
688 break;
690 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
691 (int) timeout.tv_sec,
692 (int) timeout.tv_usec);
694 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
696 if (gettimeofday (&nowtime, NULL) == -1)
697 {
698 ping_set_errno (obj, errno);
699 return (-1);
700 }
702 if ((status == -1) && (errno == EINTR))
703 {
704 dprintf ("select was interrupted by signal..\n");
705 continue;
706 }
707 else if (status < 0)
708 {
709 #if WITH_DEBUG
710 char errbuf[PING_ERRMSG_LEN];
711 dprintf ("select: %s\n",
712 sstrerror (errno, errbuf, sizeof (errbuf)));
713 #endif
714 break;
715 }
716 else if (status == 0)
717 {
718 dprintf ("select timed out\n");
719 for (ptr = ph; ptr != NULL; ptr = ptr->next)
720 if (ptr->latency < 0.0)
721 ptr->dropped++;
722 break;
723 }
725 for (ptr = ph; ptr != NULL; ptr = ptr->next)
726 {
727 if (FD_ISSET (ptr->fd, &read_fds))
728 {
729 if (ping_receive_one (obj, ptr, &nowtime) == 0)
730 ret++;
731 }
732 else if (FD_ISSET (ptr->fd, &err_fds))
733 {
734 /* clear the timer in this case so that we
735 * don't run into an endless loop. */
736 /* TODO: Set an error flag in this case. */
737 timerclear (ptr->timer);
738 }
739 }
740 } /* while (1) */
742 return (ret);
743 }
745 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
746 * Sending functions: *
747 * *
748 * ping_send_all *
749 * +-> ping_send_one_ipv4 *
750 * `-> ping_send_one_ipv6 *
751 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
752 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
753 const void *buf, size_t buflen)
754 {
755 ssize_t ret;
757 if (gettimeofday (ph->timer, NULL) == -1)
758 {
759 timerclear (ph->timer);
760 return (-1);
761 }
763 ret = sendto (ph->fd, buf, buflen, 0,
764 (struct sockaddr *) ph->addr, ph->addrlen);
766 if (ret < 0)
767 {
768 #if defined(EHOSTUNREACH)
769 if (errno == EHOSTUNREACH)
770 return (0);
771 #endif
772 #if defined(ENETUNREACH)
773 if (errno == ENETUNREACH)
774 return (0);
775 #endif
776 ping_set_errno (obj, errno);
777 }
779 return (ret);
780 }
782 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
783 {
784 struct icmp *icmp4;
785 int status;
787 char buf[4096];
788 int buflen;
790 char *data;
791 int datalen;
793 dprintf ("ph->hostname = %s\n", ph->hostname);
795 memset (buf, '\0', sizeof (buf));
796 icmp4 = (struct icmp *) buf;
797 data = (char *) (icmp4 + 1);
799 icmp4->icmp_type = ICMP_ECHO;
800 icmp4->icmp_code = 0;
801 icmp4->icmp_cksum = 0;
802 icmp4->icmp_id = htons (ph->ident);
803 icmp4->icmp_seq = htons (ph->sequence);
805 buflen = 4096 - sizeof (struct icmp);
806 strncpy (data, ph->data, buflen);
807 datalen = strlen (data);
809 buflen = datalen + sizeof (struct icmp);
811 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
813 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
815 status = ping_sendto (obj, ph, buf, buflen);
816 if (status < 0)
817 {
818 perror ("ping_sendto");
819 return (-1);
820 }
822 dprintf ("sendto: status = %i\n", status);
824 return (0);
825 }
827 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
828 {
829 struct icmp6_hdr *icmp6;
830 int status;
832 char buf[4096];
833 int buflen;
835 char *data;
836 int datalen;
838 dprintf ("ph->hostname = %s\n", ph->hostname);
840 memset (buf, '\0', sizeof (buf));
841 icmp6 = (struct icmp6_hdr *) buf;
842 data = (char *) (icmp6 + 1);
844 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
845 icmp6->icmp6_code = 0;
846 /* The checksum will be calculated by the TCP/IP stack. */
847 /* FIXME */
848 icmp6->icmp6_cksum = 0;
849 icmp6->icmp6_id = htons (ph->ident);
850 icmp6->icmp6_seq = htons (ph->sequence);
852 buflen = 4096 - sizeof (struct icmp6_hdr);
853 strncpy (data, ph->data, buflen);
854 datalen = strlen (data);
856 buflen = datalen + sizeof (struct icmp6_hdr);
858 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
860 status = ping_sendto (obj, ph, buf, buflen);
861 if (status < 0)
862 {
863 perror ("ping_sendto");
864 return (-1);
865 }
867 dprintf ("sendto: status = %i\n", status);
869 return (0);
870 }
872 static int ping_send_all (pingobj_t *obj)
873 {
874 pinghost_t *ph;
875 pinghost_t *ptr;
877 int ret;
879 ret = 0;
880 ph = obj->head;
882 for (ptr = ph; ptr != NULL; ptr = ptr->next)
883 {
884 /* start timer.. The GNU `ping6' starts the timer before
885 * sending the packet, so I will do that too */
886 if (gettimeofday (ptr->timer, NULL) == -1)
887 {
888 #if WITH_DEBUG
889 char errbuf[PING_ERRMSG_LEN];
890 dprintf ("gettimeofday: %s\n",
891 sstrerror (errno, errbuf, sizeof (errbuf)));
892 #endif
893 timerclear (ptr->timer);
894 ret--;
895 continue;
896 }
897 else
898 {
899 dprintf ("timer set for hostname = %s\n", ptr->hostname);
900 }
902 if (ptr->addrfamily == AF_INET6)
903 {
904 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
905 if (ping_send_one_ipv6 (obj, ptr) != 0)
906 {
907 timerclear (ptr->timer);
908 ret--;
909 continue;
910 }
911 }
912 else if (ptr->addrfamily == AF_INET)
913 {
914 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
915 if (ping_send_one_ipv4 (obj, ptr) != 0)
916 {
917 timerclear (ptr->timer);
918 ret--;
919 continue;
920 }
921 }
922 else /* this should not happen */
923 {
924 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
925 timerclear (ptr->timer);
926 ret--;
927 continue;
928 }
930 ptr->sequence++;
931 }
933 return (ret);
934 }
936 /*
937 * Set the TTL of a socket protocol independently.
938 */
939 static int ping_set_ttl (pinghost_t *ph, int ttl)
940 {
941 int ret = -2;
943 if (ph->addrfamily == AF_INET)
944 {
945 dprintf ("Setting TTLv4 to %i\n", ttl);
946 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
947 &ttl, sizeof (ttl));
948 }
949 else if (ph->addrfamily == AF_INET6)
950 {
951 dprintf ("Setting TTLv6 to %i\n", ttl);
952 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
953 &ttl, sizeof (ttl));
954 }
956 return (ret);
957 }
959 /*
960 * Set the TOS of a socket protocol independently.
961 *
962 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
963 * set this. See socket(7) for details.
964 */
965 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
966 {
967 int ret = EINVAL;
968 char errbuf[PING_ERRMSG_LEN];
970 if (ph->addrfamily == AF_INET)
971 {
972 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
973 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
974 &qos, sizeof (qos));
975 if (ret != 0)
976 {
977 ret = errno;
978 ping_set_error (obj, "ping_set_qos",
979 sstrerror (ret, errbuf, sizeof (errbuf)));
980 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
981 }
982 }
983 else if (ph->addrfamily == AF_INET6)
984 {
985 /* IPV6_TCLASS requires an "int". */
986 int tmp = (int) qos;
988 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
989 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
990 &tmp, sizeof (tmp));
991 if (ret != 0)
992 {
993 ret = errno;
994 ping_set_error (obj, "ping_set_qos",
995 sstrerror (ret, errbuf, sizeof (errbuf)));
996 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
997 }
998 }
1000 return (ret);
1001 }
1003 static int ping_get_ident (void)
1004 {
1005 int fd;
1006 static int did_seed = 0;
1008 int retval;
1010 if (did_seed == 0)
1011 {
1012 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1013 {
1014 unsigned int seed;
1016 if (read (fd, &seed, sizeof (seed)) != -1)
1017 {
1018 did_seed = 1;
1019 dprintf ("Random seed: %#x\n", seed);
1020 srandom (seed);
1021 }
1023 close (fd);
1024 }
1025 #if WITH_DEBUG
1026 else
1027 {
1028 char errbuf[PING_ERRMSG_LEN];
1029 dprintf ("open (/dev/urandom): %s\n",
1030 sstrerror (errno, errbuf, sizeof (errbuf)));
1031 }
1032 #endif
1033 }
1035 retval = (int) random ();
1037 dprintf ("Random number: %#x\n", retval);
1039 return (retval);
1040 }
1042 static pinghost_t *ping_alloc (void)
1043 {
1044 pinghost_t *ph;
1045 size_t ph_size;
1047 ph_size = sizeof (pinghost_t)
1048 + sizeof (struct sockaddr_storage)
1049 + sizeof (struct timeval);
1051 ph = (pinghost_t *) malloc (ph_size);
1052 if (ph == NULL)
1053 return (NULL);
1055 memset (ph, '\0', ph_size);
1057 ph->timer = (struct timeval *) (ph + 1);
1058 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1060 ph->addrlen = sizeof (struct sockaddr_storage);
1061 ph->fd = -1;
1062 ph->latency = -1.0;
1063 ph->dropped = 0;
1064 ph->ident = ping_get_ident () & 0xFFFF;
1066 return (ph);
1067 }
1069 static void ping_free (pinghost_t *ph)
1070 {
1071 if (ph->fd >= 0)
1072 close (ph->fd);
1074 if (ph->username != NULL)
1075 free (ph->username);
1077 if (ph->hostname != NULL)
1078 free (ph->hostname);
1080 if (ph->data != NULL)
1081 free (ph->data);
1083 free (ph);
1084 }
1086 /*
1087 * public methods
1088 */
1089 const char *ping_get_error (pingobj_t *obj)
1090 {
1091 if (obj == NULL)
1092 return (NULL);
1093 return (obj->errmsg);
1094 }
1096 pingobj_t *ping_construct (void)
1097 {
1098 pingobj_t *obj;
1100 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1101 return (NULL);
1102 memset (obj, 0, sizeof (pingobj_t));
1104 obj->timeout = PING_DEF_TIMEOUT;
1105 obj->ttl = PING_DEF_TTL;
1106 obj->addrfamily = PING_DEF_AF;
1107 obj->data = strdup (PING_DEF_DATA);
1108 obj->qos = 0;
1110 return (obj);
1111 }
1113 void ping_destroy (pingobj_t *obj)
1114 {
1115 pinghost_t *current;
1116 pinghost_t *next;
1118 if (obj == NULL)
1119 return;
1121 current = obj->head;
1122 next = NULL;
1124 while (current != NULL)
1125 {
1126 next = current->next;
1127 ping_free (current);
1128 current = next;
1129 }
1131 if (obj->data != NULL)
1132 free (obj->data);
1134 if (obj->srcaddr != NULL)
1135 free (obj->srcaddr);
1137 if (obj->device != NULL)
1138 free (obj->device);
1140 free (obj);
1142 return;
1143 }
1145 int ping_setopt (pingobj_t *obj, int option, void *value)
1146 {
1147 int ret = 0;
1149 if ((obj == NULL) || (value == NULL))
1150 return (-1);
1152 switch (option)
1153 {
1154 case PING_OPT_QOS:
1155 {
1156 pinghost_t *ph;
1158 obj->qos = *((uint8_t *) value);
1159 for (ph = obj->head; ph != NULL; ph = ph->next)
1160 ping_set_qos (obj, ph, obj->qos);
1161 break;
1162 }
1164 case PING_OPT_TIMEOUT:
1165 obj->timeout = *((double *) value);
1166 if (obj->timeout < 0.0)
1167 {
1168 obj->timeout = PING_DEF_TIMEOUT;
1169 ret = -1;
1170 }
1171 break;
1173 case PING_OPT_TTL:
1174 obj->ttl = *((int *) value);
1175 if ((obj->ttl < 1) || (obj->ttl > 255))
1176 {
1177 obj->ttl = PING_DEF_TTL;
1178 ret = -1;
1179 }
1180 else
1181 {
1182 pinghost_t *ph;
1184 for (ph = obj->head; ph != NULL; ph = ph->next)
1185 ping_set_ttl (ph, obj->ttl);
1186 }
1187 break;
1189 case PING_OPT_AF:
1190 obj->addrfamily = *((int *) value);
1191 if ((obj->addrfamily != AF_UNSPEC)
1192 && (obj->addrfamily != AF_INET)
1193 && (obj->addrfamily != AF_INET6))
1194 {
1195 obj->addrfamily = PING_DEF_AF;
1196 ret = -1;
1197 }
1198 if (obj->srcaddr != NULL)
1199 {
1200 free (obj->srcaddr);
1201 obj->srcaddr = NULL;
1202 }
1203 break;
1205 case PING_OPT_DATA:
1206 if (obj->data != NULL)
1207 {
1208 free (obj->data);
1209 obj->data = NULL;
1210 }
1211 obj->data = strdup ((const char *) value);
1212 break;
1214 case PING_OPT_SOURCE:
1215 {
1216 char *hostname = (char *) value;
1217 struct addrinfo ai_hints;
1218 struct addrinfo *ai_list;
1219 int status;
1220 #if WITH_DEBUG
1221 if (obj->addrfamily != AF_UNSPEC)
1222 {
1223 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1224 }
1225 #endif
1226 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1227 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1228 #if defined(AI_ADDRCONFIG)
1229 ai_hints.ai_flags = AI_ADDRCONFIG;
1230 #endif
1231 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1232 if (status != 0)
1233 {
1234 #if defined(EAI_SYSTEM)
1235 char errbuf[PING_ERRMSG_LEN];
1236 #endif
1237 ping_set_error (obj, "getaddrinfo",
1238 #if defined(EAI_SYSTEM)
1239 (status == EAI_SYSTEM)
1240 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1241 #endif
1242 gai_strerror (status));
1243 ret = -1;
1244 break;
1245 }
1246 #if WITH_DEBUG
1247 if (ai_list->ai_next != NULL)
1248 {
1249 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1250 }
1251 #endif
1252 if (obj->srcaddr == NULL)
1253 {
1254 obj->srcaddrlen = 0;
1255 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1256 if (obj->srcaddr == NULL)
1257 {
1258 ping_set_errno (obj, errno);
1259 ret = -1;
1260 freeaddrinfo (ai_list);
1261 break;
1262 }
1263 }
1264 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1265 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1266 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1267 ai_list->ai_addrlen);
1268 obj->srcaddrlen = ai_list->ai_addrlen;
1269 obj->addrfamily = ai_list->ai_family;
1271 freeaddrinfo (ai_list);
1272 } /* case PING_OPT_SOURCE */
1273 break;
1275 case PING_OPT_DEVICE:
1276 {
1277 #ifdef SO_BINDTODEVICE
1278 char *device = strdup ((char *) value);
1280 if (device == NULL)
1281 {
1282 ping_set_errno (obj, errno);
1283 ret = -1;
1284 break;
1285 }
1287 if (obj->device != NULL)
1288 free (obj->device);
1289 obj->device = device;
1290 #else /* ! SO_BINDTODEVICE */
1291 ping_set_errno (obj, ENOTSUP);
1292 ret = -1;
1293 #endif /* ! SO_BINDTODEVICE */
1294 } /* case PING_OPT_DEVICE */
1295 break;
1297 default:
1298 ret = -2;
1299 } /* switch (option) */
1301 return (ret);
1302 } /* int ping_setopt */
1305 int ping_send (pingobj_t *obj)
1306 {
1307 int ret;
1309 if (obj == NULL)
1310 return (-1);
1312 if (ping_send_all (obj) < 0)
1313 return (-1);
1315 if ((ret = ping_receive_all (obj)) < 0)
1316 return (-2);
1318 return (ret);
1319 }
1321 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1322 {
1323 while (ph != NULL)
1324 {
1325 if (strcasecmp (ph->username, host) == 0)
1326 break;
1328 ph = ph->next;
1329 }
1331 return (ph);
1332 }
1334 int ping_host_add (pingobj_t *obj, const char *host)
1335 {
1336 pinghost_t *ph;
1338 struct addrinfo ai_hints;
1339 struct addrinfo *ai_list, *ai_ptr;
1340 int ai_return;
1342 if ((obj == NULL) || (host == NULL))
1343 return (-1);
1345 dprintf ("host = %s\n", host);
1347 if (ping_host_search (obj->head, host) != NULL)
1348 return (0);
1350 memset (&ai_hints, '\0', sizeof (ai_hints));
1351 ai_hints.ai_flags = 0;
1352 #ifdef AI_ADDRCONFIG
1353 ai_hints.ai_flags |= AI_ADDRCONFIG;
1354 #endif
1355 #ifdef AI_CANONNAME
1356 ai_hints.ai_flags |= AI_CANONNAME;
1357 #endif
1358 ai_hints.ai_family = obj->addrfamily;
1359 ai_hints.ai_socktype = SOCK_RAW;
1361 if ((ph = ping_alloc ()) == NULL)
1362 {
1363 dprintf ("Out of memory!\n");
1364 return (-1);
1365 }
1367 if ((ph->username = strdup (host)) == NULL)
1368 {
1369 dprintf ("Out of memory!\n");
1370 ping_set_errno (obj, errno);
1371 ping_free (ph);
1372 return (-1);
1373 }
1375 if ((ph->hostname = strdup (host)) == NULL)
1376 {
1377 dprintf ("Out of memory!\n");
1378 ping_set_errno (obj, errno);
1379 ping_free (ph);
1380 return (-1);
1381 }
1383 /* obj->data is not garuanteed to be != NULL */
1384 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1385 {
1386 dprintf ("Out of memory!\n");
1387 ping_set_errno (obj, errno);
1388 ping_free (ph);
1389 return (-1);
1390 }
1392 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1393 {
1394 #if defined(EAI_SYSTEM)
1395 char errbuf[PING_ERRMSG_LEN];
1396 #endif
1397 dprintf ("getaddrinfo failed\n");
1398 ping_set_error (obj, "getaddrinfo",
1399 #if defined(EAI_SYSTEM)
1400 (ai_return == EAI_SYSTEM)
1401 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1402 #endif
1403 gai_strerror (ai_return));
1404 ping_free (ph);
1405 return (-1);
1406 }
1408 if (ai_list == NULL)
1409 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1411 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1412 {
1413 ph->fd = -1;
1415 if (ai_ptr->ai_family == AF_INET)
1416 {
1417 ai_ptr->ai_socktype = SOCK_RAW;
1418 ai_ptr->ai_protocol = IPPROTO_ICMP;
1419 }
1420 else if (ai_ptr->ai_family == AF_INET6)
1421 {
1422 ai_ptr->ai_socktype = SOCK_RAW;
1423 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1424 }
1425 else
1426 {
1427 char errmsg[PING_ERRMSG_LEN];
1429 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1430 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1432 dprintf (errmsg);
1433 ping_set_error (obj, "getaddrinfo", errmsg);
1434 continue;
1435 }
1437 /* TODO: Move this to a static function `ping_open_socket' and
1438 * call it whenever the socket dies. */
1439 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1440 if (ph->fd == -1)
1441 {
1442 #if WITH_DEBUG
1443 char errbuf[PING_ERRMSG_LEN];
1444 dprintf ("socket: %s\n",
1445 sstrerror (errno, errbuf, sizeof (errbuf)));
1446 #endif
1447 ping_set_errno (obj, errno);
1448 continue;
1449 }
1451 if (obj->srcaddr != NULL)
1452 {
1453 assert (obj->srcaddrlen > 0);
1454 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1456 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1457 {
1458 #if WITH_DEBUG
1459 char errbuf[PING_ERRMSG_LEN];
1460 dprintf ("bind: %s\n",
1461 sstrerror (errno, errbuf, sizeof (errbuf)));
1462 #endif
1463 ping_set_errno (obj, errno);
1464 close (ph->fd);
1465 ph->fd = -1;
1466 continue;
1467 }
1468 }
1470 #ifdef SO_BINDTODEVICE
1471 if (obj->device != NULL)
1472 {
1473 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1474 obj->device, strlen (obj->device) + 1) != 0)
1475 {
1476 #if WITH_DEBUG
1477 char errbuf[PING_ERRMSG_LEN];
1478 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1479 sstrerror (errno, errbuf, sizeof (errbuf)));
1480 #endif
1481 ping_set_errno (obj, errno);
1482 close (ph->fd);
1483 ph->fd = -1;
1484 continue;
1485 }
1486 }
1487 #endif /* SO_BINDTODEVICE */
1488 #ifdef SO_TIMESTAMP
1489 if (1) /* {{{ */
1490 {
1491 int status;
1492 int opt = 1;
1494 status = setsockopt (ph->fd,
1495 SOL_SOCKET, SO_TIMESTAMP,
1496 &opt, sizeof (opt));
1497 if (status != 0)
1498 {
1499 #if WITH_DEBUG
1500 char errbuf[PING_ERRMSG_LEN];
1501 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1502 sstrerror (errno, errbuf, sizeof (errbuf)));
1503 #endif
1504 ping_set_errno (obj, errno);
1505 close (ph->fd);
1506 ph->fd = -1;
1507 continue;
1508 }
1509 } /* }}} if (1) */
1510 #endif /* SO_TIMESTAMP */
1511 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1512 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1513 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1514 ph->addrlen = ai_ptr->ai_addrlen;
1515 ph->addrfamily = ai_ptr->ai_family;
1517 #ifdef AI_CANONNAME
1518 if ((ai_ptr->ai_canonname != NULL)
1519 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1520 {
1521 char *old_hostname;
1523 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1524 ph->hostname, ai_ptr->ai_canonname);
1526 old_hostname = ph->hostname;
1527 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1528 {
1529 /* strdup failed, falling back to old hostname */
1530 ph->hostname = old_hostname;
1531 }
1532 else if (old_hostname != NULL)
1533 {
1534 free (old_hostname);
1535 }
1536 }
1537 #endif /* AI_CANONNAME */
1539 if (ph->addrfamily == AF_INET)
1540 {
1541 int opt;
1543 /* Enable receiving the TOS field */
1544 opt = 1;
1545 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1546 &opt, sizeof (opt));
1548 /* Enable receiving the TTL field */
1549 opt = 1;
1550 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1551 &opt, sizeof (opt));
1552 }
1553 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1554 else if (ph->addrfamily == AF_INET6)
1555 {
1556 int opt;
1558 # if defined(IPV6_RECVHOPLIMIT)
1559 /* For details see RFC 3542, section 6.3. */
1560 opt = 1;
1561 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1562 &opt, sizeof (opt));
1563 # endif /* IPV6_RECVHOPLIMIT */
1565 # if defined(IPV6_RECVTCLASS)
1566 /* For details see RFC 3542, section 6.5. */
1567 opt = 1;
1568 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1569 &opt, sizeof (opt));
1570 # endif /* IPV6_RECVTCLASS */
1571 }
1572 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1574 break;
1575 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1577 freeaddrinfo (ai_list);
1579 if (ph->fd < 0)
1580 {
1581 ping_free (ph);
1582 return (-1);
1583 }
1585 /*
1586 * Adding in the front is much easier, but then the iterator will
1587 * return the host that was added last as first host. That's just not
1588 * nice. -octo
1589 */
1590 if (obj->head == NULL)
1591 {
1592 obj->head = ph;
1593 }
1594 else
1595 {
1596 pinghost_t *hptr;
1598 hptr = obj->head;
1599 while (hptr->next != NULL)
1600 hptr = hptr->next;
1602 assert ((hptr != NULL) && (hptr->next == NULL));
1603 hptr->next = ph;
1604 }
1606 ping_set_ttl (ph, obj->ttl);
1607 ping_set_qos (obj, ph, obj->qos);
1609 return (0);
1610 } /* int ping_host_add */
1612 int ping_host_remove (pingobj_t *obj, const char *host)
1613 {
1614 pinghost_t *pre, *cur;
1616 if ((obj == NULL) || (host == NULL))
1617 return (-1);
1619 pre = NULL;
1620 cur = obj->head;
1622 while (cur != NULL)
1623 {
1624 if (strcasecmp (host, cur->username) == 0)
1625 break;
1627 pre = cur;
1628 cur = cur->next;
1629 }
1631 if (cur == NULL)
1632 {
1633 ping_set_error (obj, "ping_host_remove", "Host not found");
1634 return (-1);
1635 }
1637 if (pre == NULL)
1638 obj->head = cur->next;
1639 else
1640 pre->next = cur->next;
1642 ping_free (cur);
1644 return (0);
1645 }
1647 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1648 {
1649 if (obj == NULL)
1650 return (NULL);
1651 return ((pingobj_iter_t *) obj->head);
1652 }
1654 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1655 {
1656 if (iter == NULL)
1657 return (NULL);
1658 return ((pingobj_iter_t *) iter->next);
1659 }
1661 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1662 void *buffer, size_t *buffer_len)
1663 {
1664 int ret = EINVAL;
1666 size_t orig_buffer_len = *buffer_len;
1668 if ((iter == NULL) || (buffer_len == NULL))
1669 return (-1);
1671 if ((buffer == NULL) && (*buffer_len != 0 ))
1672 return (-1);
1674 switch (info)
1675 {
1676 case PING_INFO_USERNAME:
1677 ret = ENOMEM;
1678 *buffer_len = strlen (iter->username) + 1;
1679 if (orig_buffer_len <= *buffer_len)
1680 break;
1681 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1682 * will copy `*buffer_len' and pad the rest of
1683 * `buffer' with null-bytes */
1684 strncpy (buffer, iter->username, orig_buffer_len);
1685 ret = 0;
1686 break;
1688 case PING_INFO_HOSTNAME:
1689 ret = ENOMEM;
1690 *buffer_len = strlen (iter->hostname) + 1;
1691 if (orig_buffer_len < *buffer_len)
1692 break;
1693 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1694 * will copy `*buffer_len' and pad the rest of
1695 * `buffer' with null-bytes */
1696 strncpy (buffer, iter->hostname, orig_buffer_len);
1697 ret = 0;
1698 break;
1700 case PING_INFO_ADDRESS:
1701 ret = getnameinfo ((struct sockaddr *) iter->addr,
1702 iter->addrlen,
1703 (char *) buffer,
1704 *buffer_len,
1705 NULL, 0,
1706 NI_NUMERICHOST);
1707 if (ret != 0)
1708 {
1709 if ((ret == EAI_MEMORY)
1710 #ifdef EAI_OVERFLOW
1711 || (ret == EAI_OVERFLOW)
1712 #endif
1713 )
1714 ret = ENOMEM;
1715 #if defined(EAI_SYSTEM)
1716 else if (ret == EAI_SYSTEM)
1717 ret = errno;
1718 #endif
1719 else
1720 ret = EINVAL;
1721 }
1722 break;
1724 case PING_INFO_FAMILY:
1725 ret = ENOMEM;
1726 *buffer_len = sizeof (int);
1727 if (orig_buffer_len < sizeof (int))
1728 break;
1729 *((int *) buffer) = iter->addrfamily;
1730 ret = 0;
1731 break;
1733 case PING_INFO_LATENCY:
1734 ret = ENOMEM;
1735 *buffer_len = sizeof (double);
1736 if (orig_buffer_len < sizeof (double))
1737 break;
1738 *((double *) buffer) = iter->latency;
1739 ret = 0;
1740 break;
1742 case PING_INFO_DROPPED:
1743 ret = ENOMEM;
1744 *buffer_len = sizeof (uint32_t);
1745 if (orig_buffer_len < sizeof (uint32_t))
1746 break;
1747 *((uint32_t *) buffer) = iter->dropped;
1748 ret = 0;
1749 break;
1751 case PING_INFO_SEQUENCE:
1752 ret = ENOMEM;
1753 *buffer_len = sizeof (unsigned int);
1754 if (orig_buffer_len < sizeof (unsigned int))
1755 break;
1756 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1757 ret = 0;
1758 break;
1760 case PING_INFO_IDENT:
1761 ret = ENOMEM;
1762 *buffer_len = sizeof (uint16_t);
1763 if (orig_buffer_len < sizeof (uint16_t))
1764 break;
1765 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1766 ret = 0;
1767 break;
1769 case PING_INFO_DATA:
1770 ret = ENOMEM;
1771 *buffer_len = strlen (iter->data);
1772 if (orig_buffer_len < *buffer_len)
1773 break;
1774 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1775 ret = 0;
1776 break;
1778 case PING_INFO_RECV_TTL:
1779 ret = ENOMEM;
1780 *buffer_len = sizeof (int);
1781 if (orig_buffer_len < sizeof (int))
1782 break;
1783 *((int *) buffer) = iter->recv_ttl;
1784 ret = 0;
1785 break;
1787 case PING_INFO_RECV_QOS:
1788 ret = ENOMEM;
1789 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1790 if (!*buffer_len) *buffer_len=1;
1791 if (orig_buffer_len < *buffer_len)
1792 break;
1793 memcpy(buffer,&iter->recv_qos,*buffer_len);
1794 ret = 0;
1795 break;
1796 }
1798 return (ret);
1799 } /* ping_iterator_get_info */
1801 void *ping_iterator_get_context (pingobj_iter_t *iter)
1802 {
1803 if (iter == NULL)
1804 return (NULL);
1805 return (iter->context);
1806 }
1808 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1809 {
1810 if (iter == NULL)
1811 return;
1812 iter->context = context;
1813 }