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 #ifdef __APPLE__
21 #define __APPLE_USE_RFC_3542
22 #endif
24 #if HAVE_CONFIG_H
25 # include <config.h>
26 #endif
28 #if STDC_HEADERS
29 # include <stdlib.h>
30 # include <stdio.h>
31 # include <string.h>
32 # include <inttypes.h>
33 # include <errno.h>
34 # include <assert.h>
35 #else
36 # error "You don't have the standard C99 header files installed"
37 #endif /* STDC_HEADERS */
39 #ifdef HAVE_STDINT_H
40 # include <stdint.h>
41 #endif
43 #if HAVE_UNISTD_H
44 # include <unistd.h>
45 #endif
47 #if HAVE_FCNTL_H
48 # include <fcntl.h>
49 #endif
50 #if HAVE_SYS_TYPES_H
51 # include <sys/types.h>
52 #endif
53 #if HAVE_SYS_STAT_H
54 # include <sys/stat.h>
55 #endif
57 #if TIME_WITH_SYS_TIME
58 # include <sys/time.h>
59 # include <time.h>
60 #else
61 # if HAVE_SYS_TIME_H
62 # include <sys/time.h>
63 # else
64 # include <time.h>
65 # endif
66 #endif
68 #if HAVE_SYS_SOCKET_H
69 # include <sys/socket.h>
70 #endif
72 #if HAVE_NETDB_H
73 # include <netdb.h>
74 #endif
76 #if HAVE_NETINET_IN_SYSTM_H
77 # include <netinet/in_systm.h>
78 #endif
79 #if HAVE_NETINET_IN_H
80 # include <netinet/in.h>
81 #endif
82 #if HAVE_NETINET_IP_H
83 # include <netinet/ip.h>
84 #endif
85 #if HAVE_NETINET_IP_ICMP_H
86 # include <netinet/ip_icmp.h>
87 #endif
88 #ifdef HAVE_NETINET_IP_VAR_H
89 # include <netinet/ip_var.h>
90 #endif
91 #if HAVE_NETINET_IP6_H
92 # include <netinet/ip6.h>
93 #endif
94 #if HAVE_NETINET_ICMP6_H
95 # include <netinet/icmp6.h>
96 #endif
98 #include "oping.h"
100 #if WITH_DEBUG
101 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
102 #else
103 # define dprintf(...) /**/
104 #endif
106 #define PING_ERRMSG_LEN 256
108 struct pinghost
109 {
110 /* username: name passed in by the user */
111 char *username;
112 /* hostname: name returned by the reverse lookup */
113 char *hostname;
114 struct sockaddr_storage *addr;
115 socklen_t addrlen;
116 int addrfamily;
117 int fd;
118 int ident;
119 int sequence;
120 struct timeval *timer;
121 double latency;
122 uint32_t dropped;
123 int recv_ttl;
124 uint8_t recv_qos;
125 char *data;
127 void *context;
129 struct pinghost *next;
130 };
132 struct pingobj
133 {
134 double timeout;
135 int ttl;
136 int addrfamily;
137 uint8_t qos;
138 char *data;
140 struct sockaddr *srcaddr;
141 socklen_t srcaddrlen;
143 char *device;
145 char errmsg[PING_ERRMSG_LEN];
147 pinghost_t *head;
148 };
150 /*
151 * private (static) functions
152 */
153 /* Even though Posix requires "strerror_r" to return an "int",
154 * some systems (e.g. the GNU libc) return a "char *" _and_
155 * ignore the second argument ... -tokkee */
156 static char *sstrerror (int errnum, char *buf, size_t buflen)
157 {
158 buf[0] = 0;
160 #if !HAVE_STRERROR_R
161 {
162 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
163 }
164 /* #endif !HAVE_STRERROR_R */
166 #elif STRERROR_R_CHAR_P
167 {
168 char *temp;
169 temp = strerror_r (errnum, buf, buflen);
170 if (buf[0] == 0)
171 {
172 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
173 strncpy (buf, temp, buflen);
174 else
175 strncpy (buf, "strerror_r did not return "
176 "an error message", buflen);
177 }
178 }
179 /* #endif STRERROR_R_CHAR_P */
181 #else
182 if (strerror_r (errnum, buf, buflen) != 0)
183 {
184 snprintf (buf, buflen, "Error %i (%#x); "
185 "Additionally, strerror_r failed.",
186 errnum, errnum);
187 }
188 #endif /* STRERROR_R_CHAR_P */
190 buf[buflen - 1] = 0;
192 return (buf);
193 } /* char *sstrerror */
195 static void ping_set_error (pingobj_t *obj, const char *function,
196 const char *message)
197 {
198 snprintf (obj->errmsg, sizeof (obj->errmsg),
199 "%s: %s", function, message);
200 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
201 }
203 static void ping_set_errno (pingobj_t *obj, int error_number)
204 {
205 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
206 }
208 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
209 struct timeval *res)
210 {
211 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
212 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
214 while (res->tv_usec > 1000000)
215 {
216 res->tv_usec -= 1000000;
217 res->tv_sec++;
218 }
220 return (0);
221 }
223 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
224 struct timeval *res)
225 {
226 if ((tv1->tv_sec < tv2->tv_sec)
227 || ((tv1->tv_sec == tv2->tv_sec)
228 && (tv1->tv_usec < tv2->tv_usec)))
229 return (-1);
231 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
232 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
234 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
236 while (res->tv_usec < 0)
237 {
238 res->tv_usec += 1000000;
239 res->tv_sec--;
240 }
242 return (0);
243 }
245 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
246 {
247 uint32_t sum = 0;
248 uint16_t ret = 0;
250 uint16_t *ptr;
252 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
253 sum += *ptr;
255 if (len == 1)
256 {
257 *(char *) &ret = *(char *) ptr;
258 sum += ret;
259 }
261 /* Do this twice to get all possible carries.. */
262 sum = (sum >> 16) + (sum & 0xFFFF);
263 sum = (sum >> 16) + (sum & 0xFFFF);
265 ret = ~sum;
267 return (ret);
268 }
270 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
271 size_t buffer_len)
272 {
273 struct ip *ip_hdr;
274 struct icmp *icmp_hdr;
276 size_t ip_hdr_len;
278 uint16_t recv_checksum;
279 uint16_t calc_checksum;
281 uint16_t ident;
282 uint16_t seq;
284 pinghost_t *ptr;
286 if (buffer_len < sizeof (struct ip))
287 return (NULL);
289 ip_hdr = (struct ip *) buffer;
290 ip_hdr_len = ip_hdr->ip_hl << 2;
292 if (buffer_len < ip_hdr_len)
293 return (NULL);
295 buffer += ip_hdr_len;
296 buffer_len -= ip_hdr_len;
298 if (buffer_len < sizeof (struct icmp))
299 return (NULL);
301 icmp_hdr = (struct icmp *) buffer;
302 buffer += sizeof (struct icmp);
303 buffer_len -= sizeof (struct icmp);
305 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
306 {
307 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
308 return (NULL);
309 }
311 recv_checksum = icmp_hdr->icmp_cksum;
312 icmp_hdr->icmp_cksum = 0;
313 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
314 sizeof (struct icmp) + buffer_len);
316 if (recv_checksum != calc_checksum)
317 {
318 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
319 "calculated 0x%04"PRIx16"\n",
320 recv_checksum, calc_checksum);
321 return (NULL);
322 }
324 ident = ntohs (icmp_hdr->icmp_id);
325 seq = ntohs (icmp_hdr->icmp_seq);
327 /* We have to iterate over all hosts, since ICMPv4 packets may
328 * be received on any raw v4 socket. */
329 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
330 {
331 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
332 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
334 if (ptr->addrfamily != AF_INET)
335 continue;
337 if (!timerisset (ptr->timer))
338 continue;
340 if (ptr->ident != ident)
341 continue;
343 if (((ptr->sequence - 1) & 0xFFFF) != seq)
344 continue;
346 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
347 "seq = %"PRIu16"\n",
348 ptr->hostname, ident, seq);
350 break;
351 }
353 if (ptr == NULL)
354 {
355 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
356 ident, seq);
357 }
359 if (ptr != NULL){
360 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
361 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
362 }
363 return (ptr);
364 }
366 #ifndef ICMP6_ECHO_REQUEST
367 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
368 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
369 # else
370 # define ICMP6_ECHO_REQUEST 128
371 # endif
372 #endif
374 #ifndef ICMP6_ECHO_REPLY
375 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
376 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
377 # else
378 # define ICMP6_ECHO_REPLY 129
379 # endif
380 #endif
382 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
383 size_t buffer_len)
384 {
385 struct icmp6_hdr *icmp_hdr;
387 uint16_t ident;
388 uint16_t seq;
390 pinghost_t *ptr;
392 if (buffer_len < sizeof (struct icmp6_hdr))
393 return (NULL);
395 icmp_hdr = (struct icmp6_hdr *) buffer;
396 buffer += sizeof (struct icmp);
397 buffer_len -= sizeof (struct icmp);
399 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
400 {
401 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
402 return (NULL);
403 }
405 if (icmp_hdr->icmp6_code != 0)
406 {
407 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
408 return (NULL);
409 }
411 ident = ntohs (icmp_hdr->icmp6_id);
412 seq = ntohs (icmp_hdr->icmp6_seq);
414 /* We have to iterate over all hosts, since ICMPv6 packets may
415 * be received on any raw v6 socket. */
416 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
417 {
418 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
419 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
421 if (ptr->addrfamily != AF_INET6)
422 continue;
424 if (!timerisset (ptr->timer))
425 continue;
427 if (ptr->ident != ident)
428 continue;
430 if (((ptr->sequence - 1) & 0xFFFF) != seq)
431 continue;
433 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
434 "seq = %"PRIu16"\n",
435 ptr->hostname, ident, seq);
437 break;
438 }
440 if (ptr == NULL)
441 {
442 dprintf ("No match found for ident = 0x%04"PRIx16", "
443 "seq = %"PRIu16"\n",
444 ident, seq);
445 }
447 return (ptr);
448 }
450 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
451 struct timeval *now)
452 {
453 /* Note: 'ph' is not necessarily the host object for which we receive a
454 * reply. The right object will be returned by ping_receive_ipv*(). For
455 * now, we can only rely on ph->fd and ph->addrfamily. */
457 struct timeval diff, pkt_now = *now;
458 pinghost_t *host = NULL;
459 int recv_ttl;
460 uint8_t recv_qos;
462 /*
463 * Set up the receive buffer..
464 */
465 struct msghdr msghdr;
466 struct cmsghdr *cmsg;
467 char payload_buffer[4096];
468 ssize_t payload_buffer_len;
469 char control_buffer[4096];
470 struct iovec payload_iovec;
472 memset (&payload_iovec, 0, sizeof (payload_iovec));
473 payload_iovec.iov_base = payload_buffer;
474 payload_iovec.iov_len = sizeof (payload_buffer);
476 memset (&msghdr, 0, sizeof (msghdr));
477 /* unspecified source address */
478 msghdr.msg_name = NULL;
479 msghdr.msg_namelen = 0;
480 /* output buffer vector, see readv(2) */
481 msghdr.msg_iov = &payload_iovec;
482 msghdr.msg_iovlen = 1;
483 /* output buffer for control messages */
484 msghdr.msg_control = control_buffer;
485 msghdr.msg_controllen = sizeof (control_buffer);
486 /* flags; this is an output only field.. */
487 msghdr.msg_flags = 0;
488 #ifdef MSG_XPG4_2
489 msghdr.msg_flags |= MSG_XPG4_2;
490 #endif
492 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
493 if (payload_buffer_len < 0)
494 {
495 #if WITH_DEBUG
496 char errbuf[PING_ERRMSG_LEN];
497 dprintf ("recvfrom: %s\n",
498 sstrerror (errno, errbuf, sizeof (errbuf)));
499 #endif
500 return (-1);
501 }
502 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
504 /* Iterate over all auxiliary data in msghdr */
505 recv_ttl = -1;
506 recv_qos = 0;
507 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
508 cmsg != NULL;
509 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
510 {
511 if (cmsg->cmsg_level == SOL_SOCKET)
512 {
513 #ifdef SO_TIMESTAMP
514 if (cmsg->cmsg_type == SO_TIMESTAMP)
515 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
516 #endif /* SO_TIMESTAMP */
517 }
518 else if (ph->addrfamily == AF_INET) /* {{{ */
519 {
520 if (cmsg->cmsg_level != IPPROTO_IP)
521 continue;
523 if (cmsg->cmsg_type == IP_TOS)
524 {
525 memcpy (&recv_qos, CMSG_DATA (cmsg),
526 sizeof (recv_qos));
527 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
528 } else
529 if (cmsg->cmsg_type == IP_TTL)
530 {
531 memcpy (&recv_ttl, CMSG_DATA (cmsg),
532 sizeof (recv_ttl));
533 dprintf ("TTLv4 = %i;\n", recv_ttl);
534 }
535 else
536 {
537 dprintf ("Not handling option %i.\n",
538 cmsg->cmsg_type);
539 }
540 } /* }}} */
541 else if (ph->addrfamily == AF_INET6) /* {{{ */
542 {
543 if (cmsg->cmsg_level != IPPROTO_IPV6)
544 continue;
546 if (cmsg->cmsg_type == IPV6_TCLASS)
547 {
548 memcpy (&recv_qos, CMSG_DATA (cmsg),
549 sizeof (recv_qos));
550 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
551 } else
552 #ifdef IPV6_HOPLIMIT
553 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
554 {
555 memcpy (&recv_ttl, CMSG_DATA (cmsg),
556 sizeof (recv_ttl));
557 dprintf ("TTLv6 = %i;\n", recv_ttl);
558 }
559 else
560 #endif
561 #ifdef IPV6_UNICAST_HOPS
562 if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
563 {
564 memcpy (&recv_ttl, CMSG_DATA (cmsg),
565 sizeof (recv_ttl));
566 dprintf ("TTLv6 = %i;\n", recv_ttl);
567 }
568 else
569 #endif
570 #ifdef IPV6_MULTICAST_HOPS
571 if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
572 {
573 memcpy (&recv_ttl, CMSG_DATA (cmsg),
574 sizeof (recv_ttl));
575 dprintf ("TTLv6 = %i;\n", recv_ttl);
576 }
577 else
578 #endif
579 {
580 dprintf ("Not handling option %i.\n",
581 cmsg->cmsg_type);
582 }
583 } /* }}} */
584 else
585 {
586 dprintf ("Don't know how to handle "
587 "unknown protocol %i.\n",
588 cmsg->cmsg_level);
589 }
590 } /* }}} for (cmsg) */
592 if (ph->addrfamily == AF_INET)
593 {
594 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
595 if (host == NULL)
596 return (-1);
597 }
598 else if (ph->addrfamily == AF_INET6)
599 {
600 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
601 if (host == NULL)
602 return (-1);
603 }
604 else
605 {
606 dprintf ("ping_receive_one: Unknown address family %i.\n",
607 ph->addrfamily);
608 return (-1);
609 }
611 dprintf ("rcvd: %12i.%06i\n",
612 (int) pkt_now.tv_sec,
613 (int) pkt_now.tv_usec);
614 dprintf ("sent: %12i.%06i\n",
615 (int) host->timer->tv_sec,
616 (int) host->timer->tv_usec);
618 if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
619 {
620 timerclear (host->timer);
621 return (-1);
622 }
624 dprintf ("diff: %12i.%06i\n",
625 (int) diff.tv_sec,
626 (int) diff.tv_usec);
628 if (recv_ttl >= 0)
629 host->recv_ttl = recv_ttl;
630 host->recv_qos = recv_qos;
632 host->latency = ((double) diff.tv_usec) / 1000.0;
633 host->latency += ((double) diff.tv_sec) * 1000.0;
635 timerclear (host->timer);
637 return (0);
638 }
640 static int ping_receive_all (pingobj_t *obj)
641 {
642 fd_set read_fds;
643 fd_set err_fds;
644 int num_fds;
645 int max_fd;
647 pinghost_t *ph;
648 pinghost_t *ptr;
650 struct timeval endtime;
651 struct timeval nowtime;
652 struct timeval timeout;
653 int status;
655 int ret;
657 ph = obj->head;
658 ret = 0;
660 for (ptr = ph; ptr != NULL; ptr = ptr->next)
661 {
662 ptr->latency = -1.0;
663 ptr->recv_ttl = -1;
664 }
666 if (gettimeofday (&nowtime, NULL) == -1)
667 {
668 ping_set_errno (obj, errno);
669 return (-1);
670 }
672 /* Set up timeout */
673 timeout.tv_sec = (time_t) obj->timeout;
674 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
676 dprintf ("Set timeout to %i.%06i seconds\n",
677 (int) timeout.tv_sec,
678 (int) timeout.tv_usec);
680 ping_timeval_add (&nowtime, &timeout, &endtime);
682 while (1)
683 {
684 FD_ZERO (&read_fds);
685 FD_ZERO (&err_fds);
686 num_fds = 0;
687 max_fd = -1;
689 for (ptr = ph; ptr != NULL; ptr = ptr->next)
690 {
691 if (!timerisset (ptr->timer))
692 continue;
694 FD_SET (ptr->fd, &read_fds);
695 FD_SET (ptr->fd, &err_fds);
696 num_fds++;
698 if (max_fd < ptr->fd)
699 max_fd = ptr->fd;
700 }
702 if (num_fds == 0)
703 break;
705 if (gettimeofday (&nowtime, NULL) == -1)
706 {
707 ping_set_errno (obj, errno);
708 return (-1);
709 }
711 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
712 break;
714 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
715 (int) timeout.tv_sec,
716 (int) timeout.tv_usec);
718 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
720 if (gettimeofday (&nowtime, NULL) == -1)
721 {
722 ping_set_errno (obj, errno);
723 return (-1);
724 }
726 if ((status == -1) && (errno == EINTR))
727 {
728 dprintf ("select was interrupted by signal..\n");
729 continue;
730 }
731 else if (status < 0)
732 {
733 #if WITH_DEBUG
734 char errbuf[PING_ERRMSG_LEN];
735 dprintf ("select: %s\n",
736 sstrerror (errno, errbuf, sizeof (errbuf)));
737 #endif
738 break;
739 }
740 else if (status == 0)
741 {
742 dprintf ("select timed out\n");
743 for (ptr = ph; ptr != NULL; ptr = ptr->next)
744 if (ptr->latency < 0.0)
745 ptr->dropped++;
746 break;
747 }
749 for (ptr = ph; ptr != NULL; ptr = ptr->next)
750 {
751 if (FD_ISSET (ptr->fd, &read_fds))
752 {
753 if (ping_receive_one (obj, ptr, &nowtime) == 0)
754 ret++;
755 }
756 else if (FD_ISSET (ptr->fd, &err_fds))
757 {
758 /* clear the timer in this case so that we
759 * don't run into an endless loop. */
760 /* TODO: Set an error flag in this case. */
761 timerclear (ptr->timer);
762 }
763 }
764 } /* while (1) */
766 return (ret);
767 }
769 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
770 * Sending functions: *
771 * *
772 * ping_send_all *
773 * +-> ping_send_one_ipv4 *
774 * `-> ping_send_one_ipv6 *
775 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
776 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
777 const void *buf, size_t buflen)
778 {
779 ssize_t ret;
781 if (gettimeofday (ph->timer, NULL) == -1)
782 {
783 timerclear (ph->timer);
784 return (-1);
785 }
787 ret = sendto (ph->fd, buf, buflen, 0,
788 (struct sockaddr *) ph->addr, ph->addrlen);
790 if (ret < 0)
791 {
792 #if defined(EHOSTUNREACH)
793 if (errno == EHOSTUNREACH)
794 return (0);
795 #endif
796 #if defined(ENETUNREACH)
797 if (errno == ENETUNREACH)
798 return (0);
799 #endif
800 ping_set_errno (obj, errno);
801 }
803 return (ret);
804 }
806 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
807 {
808 struct icmp *icmp4;
809 int status;
811 char buf[4096];
812 int buflen;
814 char *data;
815 int datalen;
817 dprintf ("ph->hostname = %s\n", ph->hostname);
819 memset (buf, '\0', sizeof (buf));
820 icmp4 = (struct icmp *) buf;
821 data = (char *) (icmp4 + 1);
823 icmp4->icmp_type = ICMP_ECHO;
824 icmp4->icmp_code = 0;
825 icmp4->icmp_cksum = 0;
826 icmp4->icmp_id = htons (ph->ident);
827 icmp4->icmp_seq = htons (ph->sequence);
829 buflen = 4096 - sizeof (struct icmp);
830 strncpy (data, ph->data, buflen);
831 datalen = strlen (data);
833 buflen = datalen + sizeof (struct icmp);
835 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
837 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
839 status = ping_sendto (obj, ph, buf, buflen);
840 if (status < 0)
841 {
842 perror ("ping_sendto");
843 return (-1);
844 }
846 dprintf ("sendto: status = %i\n", status);
848 return (0);
849 }
851 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
852 {
853 struct icmp6_hdr *icmp6;
854 int status;
856 char buf[4096];
857 int buflen;
859 char *data;
860 int datalen;
862 dprintf ("ph->hostname = %s\n", ph->hostname);
864 memset (buf, '\0', sizeof (buf));
865 icmp6 = (struct icmp6_hdr *) buf;
866 data = (char *) (icmp6 + 1);
868 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
869 icmp6->icmp6_code = 0;
870 /* The checksum will be calculated by the TCP/IP stack. */
871 /* FIXME */
872 icmp6->icmp6_cksum = 0;
873 icmp6->icmp6_id = htons (ph->ident);
874 icmp6->icmp6_seq = htons (ph->sequence);
876 buflen = 4096 - sizeof (struct icmp6_hdr);
877 strncpy (data, ph->data, buflen);
878 datalen = strlen (data);
880 buflen = datalen + sizeof (struct icmp6_hdr);
882 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
884 status = ping_sendto (obj, ph, buf, buflen);
885 if (status < 0)
886 {
887 perror ("ping_sendto");
888 return (-1);
889 }
891 dprintf ("sendto: status = %i\n", status);
893 return (0);
894 }
896 static int ping_send_all (pingobj_t *obj)
897 {
898 pinghost_t *ph;
899 pinghost_t *ptr;
901 int ret;
903 ret = 0;
904 ph = obj->head;
906 for (ptr = ph; ptr != NULL; ptr = ptr->next)
907 {
908 /* start timer.. The GNU `ping6' starts the timer before
909 * sending the packet, so I will do that too */
910 if (gettimeofday (ptr->timer, NULL) == -1)
911 {
912 #if WITH_DEBUG
913 char errbuf[PING_ERRMSG_LEN];
914 dprintf ("gettimeofday: %s\n",
915 sstrerror (errno, errbuf, sizeof (errbuf)));
916 #endif
917 timerclear (ptr->timer);
918 ret--;
919 continue;
920 }
921 else
922 {
923 dprintf ("timer set for hostname = %s\n", ptr->hostname);
924 }
926 if (ptr->addrfamily == AF_INET6)
927 {
928 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
929 if (ping_send_one_ipv6 (obj, ptr) != 0)
930 {
931 timerclear (ptr->timer);
932 ret--;
933 continue;
934 }
935 }
936 else if (ptr->addrfamily == AF_INET)
937 {
938 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
939 if (ping_send_one_ipv4 (obj, ptr) != 0)
940 {
941 timerclear (ptr->timer);
942 ret--;
943 continue;
944 }
945 }
946 else /* this should not happen */
947 {
948 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
949 timerclear (ptr->timer);
950 ret--;
951 continue;
952 }
954 ptr->sequence++;
955 }
957 return (ret);
958 }
960 /*
961 * Set the TTL of a socket protocol independently.
962 */
963 static int ping_set_ttl (pinghost_t *ph, int ttl)
964 {
965 int ret = -2;
967 if (ph->addrfamily == AF_INET)
968 {
969 dprintf ("Setting TTLv4 to %i\n", ttl);
970 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
971 &ttl, sizeof (ttl));
972 }
973 else if (ph->addrfamily == AF_INET6)
974 {
975 dprintf ("Setting TTLv6 to %i\n", ttl);
976 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
977 &ttl, sizeof (ttl));
978 }
980 return (ret);
981 }
983 /*
984 * Set the TOS of a socket protocol independently.
985 *
986 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
987 * set this. See socket(7) for details.
988 */
989 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
990 {
991 int ret = EINVAL;
992 char errbuf[PING_ERRMSG_LEN];
994 if (ph->addrfamily == AF_INET)
995 {
996 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
997 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
998 &qos, sizeof (qos));
999 if (ret != 0)
1000 {
1001 ret = errno;
1002 ping_set_error (obj, "ping_set_qos",
1003 sstrerror (ret, errbuf, sizeof (errbuf)));
1004 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1005 }
1006 }
1007 else if (ph->addrfamily == AF_INET6)
1008 {
1009 /* IPV6_TCLASS requires an "int". */
1010 int tmp = (int) qos;
1012 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1013 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1014 &tmp, sizeof (tmp));
1015 if (ret != 0)
1016 {
1017 ret = errno;
1018 ping_set_error (obj, "ping_set_qos",
1019 sstrerror (ret, errbuf, sizeof (errbuf)));
1020 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1021 }
1022 }
1024 return (ret);
1025 }
1027 static int ping_get_ident (void)
1028 {
1029 int fd;
1030 static int did_seed = 0;
1032 int retval;
1034 if (did_seed == 0)
1035 {
1036 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1037 {
1038 unsigned int seed;
1040 if (read (fd, &seed, sizeof (seed)) != -1)
1041 {
1042 did_seed = 1;
1043 dprintf ("Random seed: %#x\n", seed);
1044 srandom (seed);
1045 }
1047 close (fd);
1048 }
1049 #if WITH_DEBUG
1050 else
1051 {
1052 char errbuf[PING_ERRMSG_LEN];
1053 dprintf ("open (/dev/urandom): %s\n",
1054 sstrerror (errno, errbuf, sizeof (errbuf)));
1055 }
1056 #endif
1057 }
1059 retval = (int) random ();
1061 dprintf ("Random number: %#x\n", retval);
1063 return (retval);
1064 }
1066 static pinghost_t *ping_alloc (void)
1067 {
1068 pinghost_t *ph;
1069 size_t ph_size;
1071 ph_size = sizeof (pinghost_t)
1072 + sizeof (struct sockaddr_storage)
1073 + sizeof (struct timeval);
1075 ph = (pinghost_t *) malloc (ph_size);
1076 if (ph == NULL)
1077 return (NULL);
1079 memset (ph, '\0', ph_size);
1081 ph->timer = (struct timeval *) (ph + 1);
1082 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1084 ph->addrlen = sizeof (struct sockaddr_storage);
1085 ph->fd = -1;
1086 ph->latency = -1.0;
1087 ph->dropped = 0;
1088 ph->ident = ping_get_ident () & 0xFFFF;
1090 return (ph);
1091 }
1093 static void ping_free (pinghost_t *ph)
1094 {
1095 if (ph->fd >= 0)
1096 close (ph->fd);
1098 if (ph->username != NULL)
1099 free (ph->username);
1101 if (ph->hostname != NULL)
1102 free (ph->hostname);
1104 if (ph->data != NULL)
1105 free (ph->data);
1107 free (ph);
1108 }
1110 /*
1111 * public methods
1112 */
1113 const char *ping_get_error (pingobj_t *obj)
1114 {
1115 if (obj == NULL)
1116 return (NULL);
1117 return (obj->errmsg);
1118 }
1120 pingobj_t *ping_construct (void)
1121 {
1122 pingobj_t *obj;
1124 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1125 return (NULL);
1126 memset (obj, 0, sizeof (pingobj_t));
1128 obj->timeout = PING_DEF_TIMEOUT;
1129 obj->ttl = PING_DEF_TTL;
1130 obj->addrfamily = PING_DEF_AF;
1131 obj->data = strdup (PING_DEF_DATA);
1132 obj->qos = 0;
1134 return (obj);
1135 }
1137 void ping_destroy (pingobj_t *obj)
1138 {
1139 pinghost_t *current;
1140 pinghost_t *next;
1142 if (obj == NULL)
1143 return;
1145 current = obj->head;
1146 next = NULL;
1148 while (current != NULL)
1149 {
1150 next = current->next;
1151 ping_free (current);
1152 current = next;
1153 }
1155 if (obj->data != NULL)
1156 free (obj->data);
1158 if (obj->srcaddr != NULL)
1159 free (obj->srcaddr);
1161 if (obj->device != NULL)
1162 free (obj->device);
1164 free (obj);
1166 return;
1167 }
1169 int ping_setopt (pingobj_t *obj, int option, void *value)
1170 {
1171 int ret = 0;
1173 if ((obj == NULL) || (value == NULL))
1174 return (-1);
1176 switch (option)
1177 {
1178 case PING_OPT_QOS:
1179 {
1180 pinghost_t *ph;
1182 obj->qos = *((uint8_t *) value);
1183 for (ph = obj->head; ph != NULL; ph = ph->next)
1184 ping_set_qos (obj, ph, obj->qos);
1185 break;
1186 }
1188 case PING_OPT_TIMEOUT:
1189 obj->timeout = *((double *) value);
1190 if (obj->timeout < 0.0)
1191 {
1192 obj->timeout = PING_DEF_TIMEOUT;
1193 ret = -1;
1194 }
1195 break;
1197 case PING_OPT_TTL:
1198 obj->ttl = *((int *) value);
1199 if ((obj->ttl < 1) || (obj->ttl > 255))
1200 {
1201 obj->ttl = PING_DEF_TTL;
1202 ret = -1;
1203 }
1204 else
1205 {
1206 pinghost_t *ph;
1208 for (ph = obj->head; ph != NULL; ph = ph->next)
1209 ping_set_ttl (ph, obj->ttl);
1210 }
1211 break;
1213 case PING_OPT_AF:
1214 obj->addrfamily = *((int *) value);
1215 if ((obj->addrfamily != AF_UNSPEC)
1216 && (obj->addrfamily != AF_INET)
1217 && (obj->addrfamily != AF_INET6))
1218 {
1219 obj->addrfamily = PING_DEF_AF;
1220 ret = -1;
1221 }
1222 if (obj->srcaddr != NULL)
1223 {
1224 free (obj->srcaddr);
1225 obj->srcaddr = NULL;
1226 }
1227 break;
1229 case PING_OPT_DATA:
1230 if (obj->data != NULL)
1231 {
1232 free (obj->data);
1233 obj->data = NULL;
1234 }
1235 obj->data = strdup ((const char *) value);
1236 break;
1238 case PING_OPT_SOURCE:
1239 {
1240 char *hostname = (char *) value;
1241 struct addrinfo ai_hints;
1242 struct addrinfo *ai_list;
1243 int status;
1244 #if WITH_DEBUG
1245 if (obj->addrfamily != AF_UNSPEC)
1246 {
1247 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1248 }
1249 #endif
1250 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1251 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1252 #if defined(AI_ADDRCONFIG)
1253 ai_hints.ai_flags = AI_ADDRCONFIG;
1254 #endif
1255 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1256 if (status != 0)
1257 {
1258 #if defined(EAI_SYSTEM)
1259 char errbuf[PING_ERRMSG_LEN];
1260 #endif
1261 ping_set_error (obj, "getaddrinfo",
1262 #if defined(EAI_SYSTEM)
1263 (status == EAI_SYSTEM)
1264 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1265 #endif
1266 gai_strerror (status));
1267 ret = -1;
1268 break;
1269 }
1270 #if WITH_DEBUG
1271 if (ai_list->ai_next != NULL)
1272 {
1273 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1274 }
1275 #endif
1276 if (obj->srcaddr == NULL)
1277 {
1278 obj->srcaddrlen = 0;
1279 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1280 if (obj->srcaddr == NULL)
1281 {
1282 ping_set_errno (obj, errno);
1283 ret = -1;
1284 freeaddrinfo (ai_list);
1285 break;
1286 }
1287 }
1288 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1289 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1290 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1291 ai_list->ai_addrlen);
1292 obj->srcaddrlen = ai_list->ai_addrlen;
1293 obj->addrfamily = ai_list->ai_family;
1295 freeaddrinfo (ai_list);
1296 } /* case PING_OPT_SOURCE */
1297 break;
1299 case PING_OPT_DEVICE:
1300 {
1301 #ifdef SO_BINDTODEVICE
1302 char *device = strdup ((char *) value);
1304 if (device == NULL)
1305 {
1306 ping_set_errno (obj, errno);
1307 ret = -1;
1308 break;
1309 }
1311 if (obj->device != NULL)
1312 free (obj->device);
1313 obj->device = device;
1314 #else /* ! SO_BINDTODEVICE */
1315 ping_set_errno (obj, ENOTSUP);
1316 ret = -1;
1317 #endif /* ! SO_BINDTODEVICE */
1318 } /* case PING_OPT_DEVICE */
1319 break;
1321 default:
1322 ret = -2;
1323 } /* switch (option) */
1325 return (ret);
1326 } /* int ping_setopt */
1329 int ping_send (pingobj_t *obj)
1330 {
1331 int ret;
1333 if (obj == NULL)
1334 return (-1);
1336 if (ping_send_all (obj) < 0)
1337 return (-1);
1339 if ((ret = ping_receive_all (obj)) < 0)
1340 return (-2);
1342 return (ret);
1343 }
1345 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1346 {
1347 while (ph != NULL)
1348 {
1349 if (strcasecmp (ph->username, host) == 0)
1350 break;
1352 ph = ph->next;
1353 }
1355 return (ph);
1356 }
1358 int ping_host_add (pingobj_t *obj, const char *host)
1359 {
1360 pinghost_t *ph;
1362 struct addrinfo ai_hints;
1363 struct addrinfo *ai_list, *ai_ptr;
1364 int ai_return;
1366 if ((obj == NULL) || (host == NULL))
1367 return (-1);
1369 dprintf ("host = %s\n", host);
1371 if (ping_host_search (obj->head, host) != NULL)
1372 return (0);
1374 memset (&ai_hints, '\0', sizeof (ai_hints));
1375 ai_hints.ai_flags = 0;
1376 #ifdef AI_ADDRCONFIG
1377 ai_hints.ai_flags |= AI_ADDRCONFIG;
1378 #endif
1379 #ifdef AI_CANONNAME
1380 ai_hints.ai_flags |= AI_CANONNAME;
1381 #endif
1382 ai_hints.ai_family = obj->addrfamily;
1383 ai_hints.ai_socktype = SOCK_RAW;
1385 if ((ph = ping_alloc ()) == NULL)
1386 {
1387 dprintf ("Out of memory!\n");
1388 return (-1);
1389 }
1391 if ((ph->username = strdup (host)) == NULL)
1392 {
1393 dprintf ("Out of memory!\n");
1394 ping_set_errno (obj, errno);
1395 ping_free (ph);
1396 return (-1);
1397 }
1399 if ((ph->hostname = strdup (host)) == NULL)
1400 {
1401 dprintf ("Out of memory!\n");
1402 ping_set_errno (obj, errno);
1403 ping_free (ph);
1404 return (-1);
1405 }
1407 /* obj->data is not garuanteed to be != NULL */
1408 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1409 {
1410 dprintf ("Out of memory!\n");
1411 ping_set_errno (obj, errno);
1412 ping_free (ph);
1413 return (-1);
1414 }
1416 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1417 {
1418 #if defined(EAI_SYSTEM)
1419 char errbuf[PING_ERRMSG_LEN];
1420 #endif
1421 dprintf ("getaddrinfo failed\n");
1422 ping_set_error (obj, "getaddrinfo",
1423 #if defined(EAI_SYSTEM)
1424 (ai_return == EAI_SYSTEM)
1425 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1426 #endif
1427 gai_strerror (ai_return));
1428 ping_free (ph);
1429 return (-1);
1430 }
1432 if (ai_list == NULL)
1433 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1435 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1436 {
1437 ph->fd = -1;
1439 if (ai_ptr->ai_family == AF_INET)
1440 {
1441 ai_ptr->ai_socktype = SOCK_RAW;
1442 ai_ptr->ai_protocol = IPPROTO_ICMP;
1443 }
1444 else if (ai_ptr->ai_family == AF_INET6)
1445 {
1446 ai_ptr->ai_socktype = SOCK_RAW;
1447 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1448 }
1449 else
1450 {
1451 char errmsg[PING_ERRMSG_LEN];
1453 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1454 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1456 dprintf ("%s", errmsg);
1457 ping_set_error (obj, "getaddrinfo", errmsg);
1458 continue;
1459 }
1461 /* TODO: Move this to a static function `ping_open_socket' and
1462 * call it whenever the socket dies. */
1463 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1464 if (ph->fd == -1)
1465 {
1466 #if WITH_DEBUG
1467 char errbuf[PING_ERRMSG_LEN];
1468 dprintf ("socket: %s\n",
1469 sstrerror (errno, errbuf, sizeof (errbuf)));
1470 #endif
1471 ping_set_errno (obj, errno);
1472 continue;
1473 }
1475 if (obj->srcaddr != NULL)
1476 {
1477 assert (obj->srcaddrlen > 0);
1478 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1480 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1481 {
1482 #if WITH_DEBUG
1483 char errbuf[PING_ERRMSG_LEN];
1484 dprintf ("bind: %s\n",
1485 sstrerror (errno, errbuf, sizeof (errbuf)));
1486 #endif
1487 ping_set_errno (obj, errno);
1488 close (ph->fd);
1489 ph->fd = -1;
1490 continue;
1491 }
1492 }
1494 #ifdef SO_BINDTODEVICE
1495 if (obj->device != NULL)
1496 {
1497 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1498 obj->device, strlen (obj->device) + 1) != 0)
1499 {
1500 #if WITH_DEBUG
1501 char errbuf[PING_ERRMSG_LEN];
1502 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1503 sstrerror (errno, errbuf, sizeof (errbuf)));
1504 #endif
1505 ping_set_errno (obj, errno);
1506 close (ph->fd);
1507 ph->fd = -1;
1508 continue;
1509 }
1510 }
1511 #endif /* SO_BINDTODEVICE */
1512 #ifdef SO_TIMESTAMP
1513 if (1) /* {{{ */
1514 {
1515 int status;
1516 int opt = 1;
1518 status = setsockopt (ph->fd,
1519 SOL_SOCKET, SO_TIMESTAMP,
1520 &opt, sizeof (opt));
1521 if (status != 0)
1522 {
1523 #if WITH_DEBUG
1524 char errbuf[PING_ERRMSG_LEN];
1525 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1526 sstrerror (errno, errbuf, sizeof (errbuf)));
1527 #endif
1528 ping_set_errno (obj, errno);
1529 close (ph->fd);
1530 ph->fd = -1;
1531 continue;
1532 }
1533 } /* }}} if (1) */
1534 #endif /* SO_TIMESTAMP */
1535 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1536 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1537 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1538 ph->addrlen = ai_ptr->ai_addrlen;
1539 ph->addrfamily = ai_ptr->ai_family;
1541 #ifdef AI_CANONNAME
1542 if ((ai_ptr->ai_canonname != NULL)
1543 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1544 {
1545 char *old_hostname;
1547 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1548 ph->hostname, ai_ptr->ai_canonname);
1550 old_hostname = ph->hostname;
1551 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1552 {
1553 /* strdup failed, falling back to old hostname */
1554 ph->hostname = old_hostname;
1555 }
1556 else if (old_hostname != NULL)
1557 {
1558 free (old_hostname);
1559 }
1560 }
1561 #endif /* AI_CANONNAME */
1563 if (ph->addrfamily == AF_INET)
1564 {
1565 int opt;
1567 #ifdef IP_RECVTOS
1568 /* Enable receiving the TOS field */
1569 opt = 1;
1570 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1571 &opt, sizeof (opt));
1572 #endif /* IP_RECVTOS */
1574 /* Enable receiving the TTL field */
1575 opt = 1;
1576 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1577 &opt, sizeof (opt));
1578 }
1579 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1580 else if (ph->addrfamily == AF_INET6)
1581 {
1582 int opt;
1584 # if defined(IPV6_RECVHOPLIMIT)
1585 /* For details see RFC 3542, section 6.3. */
1586 opt = 1;
1587 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1588 &opt, sizeof (opt));
1589 # endif /* IPV6_RECVHOPLIMIT */
1591 # if defined(IPV6_RECVTCLASS)
1592 /* For details see RFC 3542, section 6.5. */
1593 opt = 1;
1594 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1595 &opt, sizeof (opt));
1596 # endif /* IPV6_RECVTCLASS */
1597 }
1598 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1600 break;
1601 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1603 freeaddrinfo (ai_list);
1605 if (ph->fd < 0)
1606 {
1607 ping_free (ph);
1608 return (-1);
1609 }
1611 /*
1612 * Adding in the front is much easier, but then the iterator will
1613 * return the host that was added last as first host. That's just not
1614 * nice. -octo
1615 */
1616 if (obj->head == NULL)
1617 {
1618 obj->head = ph;
1619 }
1620 else
1621 {
1622 pinghost_t *hptr;
1624 hptr = obj->head;
1625 while (hptr->next != NULL)
1626 hptr = hptr->next;
1628 assert ((hptr != NULL) && (hptr->next == NULL));
1629 hptr->next = ph;
1630 }
1632 ping_set_ttl (ph, obj->ttl);
1633 ping_set_qos (obj, ph, obj->qos);
1635 return (0);
1636 } /* int ping_host_add */
1638 int ping_host_remove (pingobj_t *obj, const char *host)
1639 {
1640 pinghost_t *pre, *cur;
1642 if ((obj == NULL) || (host == NULL))
1643 return (-1);
1645 pre = NULL;
1646 cur = obj->head;
1648 while (cur != NULL)
1649 {
1650 if (strcasecmp (host, cur->username) == 0)
1651 break;
1653 pre = cur;
1654 cur = cur->next;
1655 }
1657 if (cur == NULL)
1658 {
1659 ping_set_error (obj, "ping_host_remove", "Host not found");
1660 return (-1);
1661 }
1663 if (pre == NULL)
1664 obj->head = cur->next;
1665 else
1666 pre->next = cur->next;
1668 ping_free (cur);
1670 return (0);
1671 }
1673 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1674 {
1675 if (obj == NULL)
1676 return (NULL);
1677 return ((pingobj_iter_t *) obj->head);
1678 }
1680 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1681 {
1682 if (iter == NULL)
1683 return (NULL);
1684 return ((pingobj_iter_t *) iter->next);
1685 }
1687 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1688 void *buffer, size_t *buffer_len)
1689 {
1690 int ret = EINVAL;
1692 size_t orig_buffer_len = *buffer_len;
1694 if ((iter == NULL) || (buffer_len == NULL))
1695 return (-1);
1697 if ((buffer == NULL) && (*buffer_len != 0 ))
1698 return (-1);
1700 switch (info)
1701 {
1702 case PING_INFO_USERNAME:
1703 ret = ENOMEM;
1704 *buffer_len = strlen (iter->username) + 1;
1705 if (orig_buffer_len <= *buffer_len)
1706 break;
1707 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1708 * will copy `*buffer_len' and pad the rest of
1709 * `buffer' with null-bytes */
1710 strncpy (buffer, iter->username, orig_buffer_len);
1711 ret = 0;
1712 break;
1714 case PING_INFO_HOSTNAME:
1715 ret = ENOMEM;
1716 *buffer_len = strlen (iter->hostname) + 1;
1717 if (orig_buffer_len < *buffer_len)
1718 break;
1719 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1720 * will copy `*buffer_len' and pad the rest of
1721 * `buffer' with null-bytes */
1722 strncpy (buffer, iter->hostname, orig_buffer_len);
1723 ret = 0;
1724 break;
1726 case PING_INFO_ADDRESS:
1727 ret = getnameinfo ((struct sockaddr *) iter->addr,
1728 iter->addrlen,
1729 (char *) buffer,
1730 *buffer_len,
1731 NULL, 0,
1732 NI_NUMERICHOST);
1733 if (ret != 0)
1734 {
1735 if ((ret == EAI_MEMORY)
1736 #ifdef EAI_OVERFLOW
1737 || (ret == EAI_OVERFLOW)
1738 #endif
1739 )
1740 ret = ENOMEM;
1741 #if defined(EAI_SYSTEM)
1742 else if (ret == EAI_SYSTEM)
1743 ret = errno;
1744 #endif
1745 else
1746 ret = EINVAL;
1747 }
1748 break;
1750 case PING_INFO_FAMILY:
1751 ret = ENOMEM;
1752 *buffer_len = sizeof (int);
1753 if (orig_buffer_len < sizeof (int))
1754 break;
1755 *((int *) buffer) = iter->addrfamily;
1756 ret = 0;
1757 break;
1759 case PING_INFO_LATENCY:
1760 ret = ENOMEM;
1761 *buffer_len = sizeof (double);
1762 if (orig_buffer_len < sizeof (double))
1763 break;
1764 *((double *) buffer) = iter->latency;
1765 ret = 0;
1766 break;
1768 case PING_INFO_DROPPED:
1769 ret = ENOMEM;
1770 *buffer_len = sizeof (uint32_t);
1771 if (orig_buffer_len < sizeof (uint32_t))
1772 break;
1773 *((uint32_t *) buffer) = iter->dropped;
1774 ret = 0;
1775 break;
1777 case PING_INFO_SEQUENCE:
1778 ret = ENOMEM;
1779 *buffer_len = sizeof (unsigned int);
1780 if (orig_buffer_len < sizeof (unsigned int))
1781 break;
1782 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1783 ret = 0;
1784 break;
1786 case PING_INFO_IDENT:
1787 ret = ENOMEM;
1788 *buffer_len = sizeof (uint16_t);
1789 if (orig_buffer_len < sizeof (uint16_t))
1790 break;
1791 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1792 ret = 0;
1793 break;
1795 case PING_INFO_DATA:
1796 ret = ENOMEM;
1797 *buffer_len = strlen (iter->data);
1798 if (orig_buffer_len < *buffer_len)
1799 break;
1800 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1801 ret = 0;
1802 break;
1804 case PING_INFO_RECV_TTL:
1805 ret = ENOMEM;
1806 *buffer_len = sizeof (int);
1807 if (orig_buffer_len < sizeof (int))
1808 break;
1809 *((int *) buffer) = iter->recv_ttl;
1810 ret = 0;
1811 break;
1813 case PING_INFO_RECV_QOS:
1814 ret = ENOMEM;
1815 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1816 if (!*buffer_len) *buffer_len=1;
1817 if (orig_buffer_len < *buffer_len)
1818 break;
1819 memcpy(buffer,&iter->recv_qos,*buffer_len);
1820 ret = 0;
1821 break;
1822 }
1824 return (ret);
1825 } /* ping_iterator_get_info */
1827 void *ping_iterator_get_context (pingobj_iter_t *iter)
1828 {
1829 if (iter == NULL)
1830 return (NULL);
1831 return (iter->context);
1832 }
1834 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1835 {
1836 if (iter == NULL)
1837 return;
1838 iter->context = context;
1839 }