2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2016 Florian octo Forster <ff at octo.it>
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.
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
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
21 #define __APPLE_USE_RFC_3542
32 # include <inttypes.h>
36 # error "You don't have the standard C99 header files installed"
37 #endif /* STDC_HEADERS */
51 # include <sys/types.h>
54 # include <sys/stat.h>
57 #if TIME_WITH_SYS_TIME
58 # include <sys/time.h>
62 # include <sys/time.h>
69 # include <sys/socket.h>
76 #if HAVE_NETINET_IN_SYSTM_H
77 # include <netinet/in_systm.h>
80 # include <netinet/in.h>
83 # include <netinet/ip.h>
85 #if HAVE_NETINET_IP_ICMP_H
86 # include <netinet/ip_icmp.h>
88 #ifdef HAVE_NETINET_IP_VAR_H
89 # include <netinet/ip_var.h>
91 #if HAVE_NETINET_IP6_H
92 # include <netinet/ip6.h>
94 #if HAVE_NETINET_ICMP6_H
95 # include <netinet/icmp6.h>
101 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
103 # define dprintf(...) /**/
106 #define PING_ERRMSG_LEN 256
107 #define PING_TABLE_LEN 5381
111 /* username: name passed in by the user */
113 /* hostname: name returned by the reverse lookup */
115 struct sockaddr_storage *addr;
120 struct timeval *timer;
129 struct pinghost *next;
130 struct pinghost *table_next;
144 struct sockaddr *srcaddr;
145 socklen_t srcaddrlen;
152 char errmsg[PING_ERRMSG_LEN];
155 pinghost_t *table[PING_TABLE_LEN];
159 * private (static) functions
161 /* Even though Posix requires "strerror_r" to return an "int",
162 * some systems (e.g. the GNU libc) return a "char *" _and_
163 * ignore the second argument ... -tokkee */
164 static char *sstrerror (int errnum, char *buf, size_t buflen)
170 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
172 /* #endif !HAVE_STRERROR_R */
174 #elif STRERROR_R_CHAR_P
177 temp = strerror_r (errnum, buf, buflen);
180 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
181 strncpy (buf, temp, buflen);
183 strncpy (buf, "strerror_r did not return "
184 "an error message", buflen);
187 /* #endif STRERROR_R_CHAR_P */
190 if (strerror_r (errnum, buf, buflen) != 0)
192 snprintf (buf, buflen, "Error %i (%#x); "
193 "Additionally, strerror_r failed.",
196 #endif /* STRERROR_R_CHAR_P */
201 } /* char *sstrerror */
203 static void ping_set_error (pingobj_t *obj, const char *function,
206 snprintf (obj->errmsg, sizeof (obj->errmsg),
207 "%s: %s", function, message);
208 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
211 static void ping_set_errno (pingobj_t *obj, int error_number)
213 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
216 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
219 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
220 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
222 while (res->tv_usec > 1000000)
224 res->tv_usec -= 1000000;
231 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
234 if ((tv1->tv_sec < tv2->tv_sec)
235 || ((tv1->tv_sec == tv2->tv_sec)
236 && (tv1->tv_usec < tv2->tv_usec)))
239 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
240 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
242 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
244 while (res->tv_usec < 0)
246 res->tv_usec += 1000000;
253 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
260 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
265 *(char *) &ret = *(char *) ptr;
269 /* Do this twice to get all possible carries.. */
270 sum = (sum >> 16) + (sum & 0xFFFF);
271 sum = (sum >> 16) + (sum & 0xFFFF);
278 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
282 struct icmp *icmp_hdr;
286 uint16_t recv_checksum;
287 uint16_t calc_checksum;
294 if (buffer_len < sizeof (struct ip))
297 ip_hdr = (struct ip *) buffer;
298 ip_hdr_len = ip_hdr->ip_hl << 2;
300 if (buffer_len < ip_hdr_len)
303 buffer += ip_hdr_len;
304 buffer_len -= ip_hdr_len;
306 if (buffer_len < ICMP_MINLEN)
309 icmp_hdr = (struct icmp *) buffer;
310 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
312 dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type);
316 recv_checksum = icmp_hdr->icmp_cksum;
317 /* This writes to buffer. */
318 icmp_hdr->icmp_cksum = 0;
319 calc_checksum = ping_icmp4_checksum (buffer, buffer_len);
321 if (recv_checksum != calc_checksum)
323 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
324 "calculated 0x%04"PRIx16"\n",
325 recv_checksum, calc_checksum);
329 ident = ntohs (icmp_hdr->icmp_id);
330 seq = ntohs (icmp_hdr->icmp_seq);
332 for (ptr = obj->table[ident % PING_TABLE_LEN];
333 ptr != NULL; ptr = ptr->table_next)
335 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
336 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
338 if (ptr->addrfamily != AF_INET)
341 if (!timerisset (ptr->timer))
344 if (ptr->ident != ident)
347 if (((ptr->sequence - 1) & 0xFFFF) != seq)
350 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
352 ptr->hostname, ident, seq);
359 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
364 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
365 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
370 #ifndef ICMP6_ECHO_REQUEST
371 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
372 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
374 # define ICMP6_ECHO_REQUEST 128
378 #ifndef ICMP6_ECHO_REPLY
379 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
380 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
382 # define ICMP6_ECHO_REPLY 129
386 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
389 struct icmp6_hdr *icmp_hdr;
396 if (buffer_len < ICMP_MINLEN)
399 icmp_hdr = (struct icmp6_hdr *) buffer;
400 buffer += ICMP_MINLEN;
401 buffer_len -= ICMP_MINLEN;
403 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
405 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
409 if (icmp_hdr->icmp6_code != 0)
411 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
415 ident = ntohs (icmp_hdr->icmp6_id);
416 seq = ntohs (icmp_hdr->icmp6_seq);
418 /* We have to iterate over all hosts, since ICMPv6 packets may
419 * be received on any raw v6 socket. */
420 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
422 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
423 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
425 if (ptr->addrfamily != AF_INET6)
428 if (!timerisset (ptr->timer))
431 if (ptr->ident != ident)
434 if (((ptr->sequence - 1) & 0xFFFF) != seq)
437 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
439 ptr->hostname, ident, seq);
446 dprintf ("No match found for ident = 0x%04"PRIx16", "
454 static int ping_receive_one (pingobj_t *obj, struct timeval *now, int addrfam)
456 int fd = addrfam == AF_INET6 ? obj->fd6 : obj->fd4;
457 struct timeval diff, pkt_now = *now;
458 pinghost_t *host = NULL;
463 * Set up the receive buffer..
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;
489 msghdr.msg_flags |= MSG_XPG4_2;
492 payload_buffer_len = recvmsg (fd, &msghdr, /* flags = */ 0);
493 if (payload_buffer_len < 0)
496 char errbuf[PING_ERRMSG_LEN];
497 dprintf ("recvfrom: %s\n",
498 sstrerror (errno, errbuf, sizeof (errbuf)));
502 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, fd);
504 /* Iterate over all auxiliary data in msghdr */
507 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
509 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
511 if (cmsg->cmsg_level == SOL_SOCKET)
514 if (cmsg->cmsg_type == SO_TIMESTAMP)
515 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
516 #endif /* SO_TIMESTAMP */
518 else if (addrfam == AF_INET) /* {{{ */
520 if (cmsg->cmsg_level != IPPROTO_IP)
523 if (cmsg->cmsg_type == IP_TOS)
525 memcpy (&recv_qos, CMSG_DATA (cmsg),
527 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
529 if (cmsg->cmsg_type == IP_TTL)
531 memcpy (&recv_ttl, CMSG_DATA (cmsg),
533 dprintf ("TTLv4 = %i;\n", recv_ttl);
537 dprintf ("Not handling option %i.\n",
541 else if (addrfam == AF_INET6) /* {{{ */
543 if (cmsg->cmsg_level != IPPROTO_IPV6)
546 if (cmsg->cmsg_type == IPV6_TCLASS)
548 memcpy (&recv_qos, CMSG_DATA (cmsg),
550 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
553 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
555 memcpy (&recv_ttl, CMSG_DATA (cmsg),
557 dprintf ("TTLv6 = %i;\n", recv_ttl);
561 #ifdef IPV6_UNICAST_HOPS
562 if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
564 memcpy (&recv_ttl, CMSG_DATA (cmsg),
566 dprintf ("TTLv6 = %i;\n", recv_ttl);
570 #ifdef IPV6_MULTICAST_HOPS
571 if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
573 memcpy (&recv_ttl, CMSG_DATA (cmsg),
575 dprintf ("TTLv6 = %i;\n", recv_ttl);
580 dprintf ("Not handling option %i.\n",
586 dprintf ("Don't know how to handle "
587 "unknown protocol %i.\n",
590 } /* }}} for (cmsg) */
592 if (addrfam == AF_INET)
594 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
598 else if (addrfam == AF_INET6)
600 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
606 dprintf ("ping_receive_one: Unknown address family %i.\n",
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)
620 timerclear (host->timer);
624 dprintf ("diff: %12i.%06i\n",
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);
640 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
641 * Sending functions: *
644 * +-> ping_send_one_ipv4 *
645 * `-> ping_send_one_ipv6 *
646 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
647 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
648 const void *buf, size_t buflen, int fd)
652 if (gettimeofday (ph->timer, NULL) == -1)
654 timerclear (ph->timer);
658 ret = sendto (fd, buf, buflen, 0,
659 (struct sockaddr *) ph->addr, ph->addrlen);
663 #if defined(EHOSTUNREACH)
664 if (errno == EHOSTUNREACH)
667 #if defined(ENETUNREACH)
668 if (errno == ENETUNREACH)
671 ping_set_errno (obj, errno);
677 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph, int fd)
682 char buf[4096] = {0};
688 dprintf ("ph->hostname = %s\n", ph->hostname);
690 icmp4 = (struct icmp *) buf;
691 *icmp4 = (struct icmp) {
692 .icmp_type = ICMP_ECHO,
693 .icmp_id = htons (ph->ident),
694 .icmp_seq = htons (ph->sequence),
697 datalen = strlen (ph->data);
698 buflen = ICMP_MINLEN + datalen;
699 if (sizeof (buf) < buflen)
702 data = buf + ICMP_MINLEN;
703 memcpy (data, ph->data, datalen);
705 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
707 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
709 status = ping_sendto (obj, ph, buf, buflen, fd);
712 perror ("ping_sendto");
716 dprintf ("sendto: status = %i\n", status);
721 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph, int fd)
723 struct icmp6_hdr *icmp6;
726 char buf[4096] = {0};
732 dprintf ("ph->hostname = %s\n", ph->hostname);
734 icmp6 = (struct icmp6_hdr *) buf;
735 *icmp6 = (struct icmp6_hdr) {
736 .icmp6_type = ICMP6_ECHO_REQUEST,
737 .icmp6_id = htons (ph->ident),
738 .icmp6_seq = htons (ph->sequence),
741 datalen = strlen (ph->data);
742 buflen = sizeof (*icmp6) + datalen;
743 if (sizeof (buf) < buflen)
746 data = buf + ICMP_MINLEN;
747 memcpy (data, ph->data, datalen);
749 /* The checksum will be calculated by the TCP/IP stack. */
751 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
753 status = ping_sendto (obj, ph, buf, buflen, fd);
756 perror ("ping_sendto");
760 dprintf ("sendto: status = %i\n", status);
765 static int ping_send_one (pingobj_t *obj, pinghost_t *ptr, int fd)
767 if (gettimeofday (ptr->timer, NULL) == -1)
769 /* start timer.. The GNU `ping6' starts the timer before
770 * sending the packet, so I will do that too */
772 char errbuf[PING_ERRMSG_LEN];
773 dprintf ("gettimeofday: %s\n",
774 sstrerror (errno, errbuf, sizeof (errbuf)));
776 timerclear (ptr->timer);
781 dprintf ("timer set for hostname = %s\n", ptr->hostname);
784 if (ptr->addrfamily == AF_INET6)
786 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
787 if (ping_send_one_ipv6 (obj, ptr, fd) != 0)
789 timerclear (ptr->timer);
793 else if (ptr->addrfamily == AF_INET)
795 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
796 if (ping_send_one_ipv4 (obj, ptr, fd) != 0)
798 timerclear (ptr->timer);
802 else /* this should not happen */
804 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
805 timerclear (ptr->timer);
815 * Set the TTL of a socket protocol independently.
817 static int ping_set_ttl (pingobj_t *obj, int ttl)
820 char errbuf[PING_ERRMSG_LEN];
824 if (setsockopt (obj->fd4, IPPROTO_IP, IP_TTL,
828 ping_set_error (obj, "ping_set_ttl",
829 sstrerror (ret, errbuf, sizeof (errbuf)));
830 dprintf ("Setting TTLv4 failed: %s\n", errbuf);
836 dprintf ("Setting TTLv6 to %i\n", ttl);
837 if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
841 ping_set_error (obj, "ping_set_ttl",
842 sstrerror (ret, errbuf, sizeof (errbuf)));
843 dprintf ("Setting TTLv6 failed: %s\n", errbuf);
851 * Set the TOS of a socket protocol independently.
853 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
854 * set this. See socket(7) for details.
856 static int ping_set_qos (pingobj_t *obj, uint8_t qos)
859 char errbuf[PING_ERRMSG_LEN];
863 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
864 if (setsockopt (obj->fd4, IPPROTO_IP, IP_TOS,
868 ping_set_error (obj, "ping_set_qos",
869 sstrerror (ret, errbuf, sizeof (errbuf)));
870 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
876 /* IPV6_TCLASS requires an "int". */
879 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
880 if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_TCLASS,
884 ping_set_error (obj, "ping_set_qos",
885 sstrerror (ret, errbuf, sizeof (errbuf)));
886 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
893 static int ping_get_ident (void)
896 static int did_seed = 0;
902 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
906 if (read (fd, &seed, sizeof (seed)) != -1)
909 dprintf ("Random seed: %#x\n", seed);
918 char errbuf[PING_ERRMSG_LEN];
919 dprintf ("open (/dev/urandom): %s\n",
920 sstrerror (errno, errbuf, sizeof (errbuf)));
925 retval = (int) random ();
927 dprintf ("Random number: %#x\n", retval);
932 static pinghost_t *ping_alloc (void)
937 ph_size = sizeof (pinghost_t)
938 + sizeof (struct sockaddr_storage)
939 + sizeof (struct timeval);
941 ph = (pinghost_t *) malloc (ph_size);
945 memset (ph, '\0', ph_size);
947 ph->timer = (struct timeval *) (ph + 1);
948 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
950 ph->addrlen = sizeof (struct sockaddr_storage);
953 ph->ident = ping_get_ident () & 0xFFFF;
958 static void ping_free (pinghost_t *ph)
960 if (ph->username != NULL)
963 if (ph->hostname != NULL)
966 if (ph->data != NULL)
972 /* ping_open_socket opens, initializes and returns a new raw socket to use for
973 * ICMPv4 or ICMPv6 packets. addrfam must be either AF_INET or AF_INET6. On
974 * error, -1 is returned and obj->errmsg is set appropriately. */
975 static int ping_open_socket(pingobj_t *obj, int addrfam)
978 if (addrfam == AF_INET6)
980 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMPV6);
982 else if (addrfam == AF_INET)
984 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMP);
986 else /* this should not happen */
988 ping_set_error (obj, "ping_open_socket", "Unknown address family");
989 dprintf ("Unknown address family: %i\n", addrfam);
995 ping_set_errno (obj, errno);
997 char errbuf[PING_ERRMSG_LEN];
998 dprintf ("socket: %s\n",
999 sstrerror (errno, errbuf, sizeof (errbuf)));
1003 else if (fd >= FD_SETSIZE)
1005 ping_set_errno (obj, EMFILE);
1006 dprintf ("socket(2) returned file descriptor %d, which is above the file "
1007 "descriptor limit for select(2) (FD_SETSIZE = %d)\n",
1013 if (obj->srcaddr != NULL)
1015 assert (obj->srcaddrlen > 0);
1016 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1018 if (bind (fd, obj->srcaddr, obj->srcaddrlen) == -1)
1020 ping_set_errno (obj, errno);
1022 char errbuf[PING_ERRMSG_LEN];
1023 dprintf ("bind: %s\n",
1024 sstrerror (errno, errbuf, sizeof (errbuf)));
1031 #ifdef SO_BINDTODEVICE
1032 if (obj->device != NULL)
1034 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1035 obj->device, strlen (obj->device) + 1) != 0)
1037 ping_set_errno (obj, errno);
1039 char errbuf[PING_ERRMSG_LEN];
1040 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1041 sstrerror (errno, errbuf, sizeof (errbuf)));
1047 #endif /* SO_BINDTODEVICE */
1051 if (setsockopt(fd, SOL_SOCKET, SO_MARK,
1052 &obj->mark, sizeof(obj->mark)) != 0)
1054 ping_set_errno (obj, errno);
1056 char errbuf[PING_ERRMSG_LEN];
1057 dprintf ("setsockopt (SO_MARK): %s\n",
1058 sstrerror (errno, errbuf, sizeof (errbuf)));
1071 status = setsockopt (fd,
1072 SOL_SOCKET, SO_TIMESTAMP,
1073 &opt, sizeof (opt));
1076 ping_set_errno (obj, errno);
1078 char errbuf[PING_ERRMSG_LEN];
1079 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1080 sstrerror (errno, errbuf, sizeof (errbuf)));
1086 #endif /* SO_TIMESTAMP */
1088 if (addrfam == AF_INET)
1093 /* Enable receiving the TOS field */
1095 setsockopt (fd, IPPROTO_IP, IP_RECVTOS,
1096 &opt, sizeof (opt));
1097 #endif /* IP_RECVTOS */
1099 /* Enable receiving the TTL field */
1101 setsockopt (fd, IPPROTO_IP, IP_RECVTTL,
1102 &opt, sizeof (opt));
1104 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1105 else if (addrfam == AF_INET6)
1109 # if defined(IPV6_RECVHOPLIMIT)
1110 /* For details see RFC 3542, section 6.3. */
1112 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1113 &opt, sizeof (opt));
1114 # endif /* IPV6_RECVHOPLIMIT */
1116 # if defined(IPV6_RECVTCLASS)
1117 /* For details see RFC 3542, section 6.5. */
1119 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1120 &opt, sizeof (opt));
1121 # endif /* IPV6_RECVTCLASS */
1123 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1131 const char *ping_get_error (pingobj_t *obj)
1135 return (obj->errmsg);
1138 pingobj_t *ping_construct (void)
1142 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1144 memset (obj, 0, sizeof (pingobj_t));
1146 obj->timeout = PING_DEF_TIMEOUT;
1147 obj->ttl = PING_DEF_TTL;
1148 obj->addrfamily = PING_DEF_AF;
1149 obj->data = strdup (PING_DEF_DATA);
1157 void ping_destroy (pingobj_t *obj)
1159 pinghost_t *current;
1165 current = obj->head;
1168 while (current != NULL)
1170 next = current->next;
1171 ping_free (current);
1175 if (obj->data != NULL)
1178 if (obj->srcaddr != NULL)
1179 free (obj->srcaddr);
1181 if (obj->device != NULL)
1195 int ping_setopt (pingobj_t *obj, int option, void *value)
1199 if ((obj == NULL) || (value == NULL))
1206 obj->qos = *((uint8_t *) value);
1207 ret = ping_set_qos (obj, obj->qos);
1211 case PING_OPT_TIMEOUT:
1212 obj->timeout = *((double *) value);
1213 if (obj->timeout < 0.0)
1215 obj->timeout = PING_DEF_TIMEOUT;
1221 ret = *((int *) value);
1222 if ((ret < 1) || (ret > 255))
1224 obj->ttl = PING_DEF_TTL;
1230 ret = ping_set_ttl (obj, obj->ttl);
1235 obj->addrfamily = *((int *) value);
1236 if ((obj->addrfamily != AF_UNSPEC)
1237 && (obj->addrfamily != AF_INET)
1238 && (obj->addrfamily != AF_INET6))
1240 obj->addrfamily = PING_DEF_AF;
1243 if (obj->srcaddr != NULL)
1245 free (obj->srcaddr);
1246 obj->srcaddr = NULL;
1251 if (obj->data != NULL)
1256 obj->data = strdup ((const char *) value);
1259 case PING_OPT_SOURCE:
1261 char *hostname = (char *) value;
1262 struct addrinfo ai_hints;
1263 struct addrinfo *ai_list;
1266 if (obj->addrfamily != AF_UNSPEC)
1268 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1271 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1272 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1273 #if defined(AI_ADDRCONFIG)
1274 ai_hints.ai_flags = AI_ADDRCONFIG;
1276 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1279 #if defined(EAI_SYSTEM)
1280 char errbuf[PING_ERRMSG_LEN];
1282 ping_set_error (obj, "getaddrinfo",
1283 #if defined(EAI_SYSTEM)
1284 (status == EAI_SYSTEM)
1285 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1287 gai_strerror (status));
1292 if (ai_list->ai_next != NULL)
1294 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1297 if (obj->srcaddr == NULL)
1299 obj->srcaddrlen = 0;
1300 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1301 if (obj->srcaddr == NULL)
1303 ping_set_errno (obj, errno);
1305 freeaddrinfo (ai_list);
1309 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1310 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1311 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1312 ai_list->ai_addrlen);
1313 obj->srcaddrlen = ai_list->ai_addrlen;
1314 obj->addrfamily = ai_list->ai_family;
1316 freeaddrinfo (ai_list);
1317 } /* case PING_OPT_SOURCE */
1320 case PING_OPT_DEVICE:
1322 #ifdef SO_BINDTODEVICE
1323 char *device = strdup ((char *) value);
1327 ping_set_errno (obj, errno);
1332 if (obj->device != NULL)
1334 obj->device = device;
1335 #else /* ! SO_BINDTODEVICE */
1336 ping_set_errno (obj, ENOTSUP);
1338 #endif /* ! SO_BINDTODEVICE */
1339 } /* case PING_OPT_DEVICE */
1345 obj->mark = *(int*)(value);
1348 ping_set_errno (obj, ENOTSUP);
1350 #endif /* !SO_MARK */
1352 } /* case PING_OPT_MARK */
1357 } /* switch (option) */
1360 } /* int ping_setopt */
1362 int ping_send (pingobj_t *obj)
1366 struct timeval endtime;
1367 struct timeval nowtime;
1368 struct timeval timeout;
1370 _Bool need_ipv4_socket = 0;
1371 _Bool need_ipv6_socket = 0;
1373 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
1375 ptr->latency = -1.0;
1378 if (ptr->addrfamily == AF_INET)
1379 need_ipv4_socket = 1;
1380 else if (ptr->addrfamily == AF_INET6)
1381 need_ipv6_socket = 1;
1384 if (!need_ipv4_socket && !need_ipv6_socket)
1386 ping_set_error (obj, "ping_send", "No hosts to ping");
1390 if (need_ipv4_socket && obj->fd4 == -1)
1392 obj->fd4 = ping_open_socket(obj, AF_INET);
1395 ping_set_ttl (obj, obj->ttl);
1396 ping_set_qos (obj, obj->qos);
1398 if (need_ipv6_socket && obj->fd6 == -1)
1400 obj->fd6 = ping_open_socket(obj, AF_INET6);
1403 ping_set_ttl (obj, obj->ttl);
1404 ping_set_qos (obj, obj->qos);
1407 if (gettimeofday (&nowtime, NULL) == -1)
1409 ping_set_errno (obj, errno);
1413 /* Set up timeout */
1414 timeout.tv_sec = (time_t) obj->timeout;
1415 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
1417 dprintf ("Set timeout to %i.%06i seconds\n",
1418 (int) timeout.tv_sec,
1419 (int) timeout.tv_usec);
1421 ping_timeval_add (&nowtime, &timeout, &endtime);
1423 /* host_to_ping points to the host to which to send the next ping. The
1424 * pointer is advanced to the next host in the linked list after the
1425 * ping has been sent. If host_to_ping is NULL, no more pings need to be
1427 pinghost_t *host_to_ping = obj->head;
1429 /* pings_in_flight is the number of hosts we sent a "ping" to but didn't
1430 * receive a "pong" yet. */
1431 int pings_in_flight = 0;
1433 /* pongs_received is the number of echo replies received. Unless there
1434 * is an error, this is used as the return value of ping_send(). */
1435 int pongs_received = 0;
1437 int error_count = 0;
1439 while (pings_in_flight > 0 || host_to_ping != NULL)
1447 FD_ZERO (&read_fds);
1448 FD_ZERO (&write_fds);
1452 FD_SET(obj->fd4, &read_fds);
1453 if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET)
1454 write_fd = obj->fd4;
1456 if (max_fd < obj->fd4)
1462 FD_SET(obj->fd6, &read_fds);
1463 if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET6)
1464 write_fd = obj->fd6;
1466 if (max_fd < obj->fd6)
1471 FD_SET(write_fd, &write_fds);
1473 assert (max_fd != -1);
1474 assert (max_fd < FD_SETSIZE);
1476 if (gettimeofday (&nowtime, NULL) == -1)
1478 ping_set_errno (obj, errno);
1482 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
1485 dprintf ("Waiting on %i sockets for %u.%06u seconds\n",
1486 ((obj->fd4 != -1) ? 1 : 0) + ((obj->fd6 != -1) ? 1 : 0),
1487 (unsigned) timeout.tv_sec,
1488 (unsigned) timeout.tv_usec);
1490 int status = select (max_fd + 1, &read_fds, &write_fds, NULL, &timeout);
1492 if (gettimeofday (&nowtime, NULL) == -1)
1494 ping_set_errno (obj, errno);
1500 ping_set_errno (obj, errno);
1501 dprintf ("select: %s\n", obj->errmsg);
1504 else if (status == 0)
1506 dprintf ("select timed out\n");
1509 for (ph = obj->head; ph != NULL; ph = ph->next)
1510 if (ph->latency < 0.0)
1515 /* first, check if we can receive a reply ... */
1516 if (obj->fd6 != -1 && FD_ISSET (obj->fd6, &read_fds))
1518 if (ping_receive_one (obj, &nowtime, AF_INET6) == 0)
1525 if (obj->fd4 != -1 && FD_ISSET (obj->fd4, &read_fds))
1527 if (ping_receive_one (obj, &nowtime, AF_INET) == 0)
1535 /* ... and if no reply is available to read, continue sending
1538 /* this condition should always be true. We keep it for
1539 * consistency with the read blocks above and just to be on the
1541 if (write_fd != -1 && FD_ISSET (write_fd, &write_fds))
1543 if (ping_send_one (obj, host_to_ping, write_fd) == 0)
1547 host_to_ping = host_to_ping->next;
1553 return (-1 * error_count);
1554 return (pongs_received);
1555 } /* int ping_send */
1557 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1561 if (strcasecmp (ph->username, host) == 0)
1570 int ping_host_add (pingobj_t *obj, const char *host)
1574 struct addrinfo ai_hints;
1575 struct addrinfo *ai_list, *ai_ptr;
1578 if ((obj == NULL) || (host == NULL))
1581 dprintf ("host = %s\n", host);
1583 if (ping_host_search (obj->head, host) != NULL)
1586 memset (&ai_hints, '\0', sizeof (ai_hints));
1587 ai_hints.ai_flags = 0;
1588 #ifdef AI_ADDRCONFIG
1589 ai_hints.ai_flags |= AI_ADDRCONFIG;
1592 ai_hints.ai_flags |= AI_CANONNAME;
1594 ai_hints.ai_family = obj->addrfamily;
1595 ai_hints.ai_socktype = SOCK_RAW;
1597 if ((ph = ping_alloc ()) == NULL)
1599 dprintf ("Out of memory!\n");
1603 if ((ph->username = strdup (host)) == NULL)
1605 dprintf ("Out of memory!\n");
1606 ping_set_errno (obj, errno);
1611 if ((ph->hostname = strdup (host)) == NULL)
1613 dprintf ("Out of memory!\n");
1614 ping_set_errno (obj, errno);
1619 /* obj->data is not garuanteed to be != NULL */
1620 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1622 dprintf ("Out of memory!\n");
1623 ping_set_errno (obj, errno);
1628 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1630 #if defined(EAI_SYSTEM)
1631 char errbuf[PING_ERRMSG_LEN];
1633 dprintf ("getaddrinfo failed\n");
1634 ping_set_error (obj, "getaddrinfo",
1635 #if defined(EAI_SYSTEM)
1636 (ai_return == EAI_SYSTEM)
1637 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1639 gai_strerror (ai_return));
1644 if (ai_list == NULL)
1645 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1647 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1649 if (ai_ptr->ai_family == AF_INET)
1651 ai_ptr->ai_socktype = SOCK_RAW;
1652 ai_ptr->ai_protocol = IPPROTO_ICMP;
1654 else if (ai_ptr->ai_family == AF_INET6)
1656 ai_ptr->ai_socktype = SOCK_RAW;
1657 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1661 char errmsg[PING_ERRMSG_LEN];
1663 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1664 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1666 dprintf ("%s", errmsg);
1667 ping_set_error (obj, "getaddrinfo", errmsg);
1671 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1672 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1673 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1674 ph->addrlen = ai_ptr->ai_addrlen;
1675 ph->addrfamily = ai_ptr->ai_family;
1678 if ((ai_ptr->ai_canonname != NULL)
1679 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1683 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1684 ph->hostname, ai_ptr->ai_canonname);
1686 old_hostname = ph->hostname;
1687 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1689 /* strdup failed, falling back to old hostname */
1690 ph->hostname = old_hostname;
1692 else if (old_hostname != NULL)
1694 free (old_hostname);
1697 #endif /* AI_CANONNAME */
1698 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1700 freeaddrinfo (ai_list);
1703 * Adding in the front is much easier, but then the iterator will
1704 * return the host that was added last as first host. That's just not
1707 if (obj->head == NULL)
1716 while (hptr->next != NULL)
1719 assert ((hptr != NULL) && (hptr->next == NULL));
1723 ph->table_next = obj->table[ph->ident % PING_TABLE_LEN];
1724 obj->table[ph->ident % PING_TABLE_LEN] = ph;
1727 } /* int ping_host_add */
1729 int ping_host_remove (pingobj_t *obj, const char *host)
1731 pinghost_t *pre, *cur, *target;
1733 if ((obj == NULL) || (host == NULL))
1741 if (strcasecmp (host, cur->username) == 0)
1750 ping_set_error (obj, "ping_host_remove", "Host not found");
1755 obj->head = cur->next;
1757 pre->next = cur->next;
1762 cur = obj->table[target->ident % PING_TABLE_LEN];
1770 cur = cur->table_next;
1775 ping_set_error(obj, "ping_host_remove", "Host not found (T)");
1781 obj->table[target->ident % PING_TABLE_LEN] = cur->table_next;
1783 pre->table_next = cur->table_next;
1790 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1794 return ((pingobj_iter_t *) obj->head);
1797 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1801 return ((pingobj_iter_t *) iter->next);
1804 int ping_iterator_count (pingobj_t *obj)
1810 pingobj_iter_t *iter = obj->head;
1818 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1819 void *buffer, size_t *buffer_len)
1823 size_t orig_buffer_len = *buffer_len;
1825 if ((iter == NULL) || (buffer_len == NULL))
1828 if ((buffer == NULL) && (*buffer_len != 0 ))
1833 case PING_INFO_USERNAME:
1835 *buffer_len = strlen (iter->username) + 1;
1836 if (orig_buffer_len <= *buffer_len)
1838 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1839 * will copy `*buffer_len' and pad the rest of
1840 * `buffer' with null-bytes */
1841 strncpy (buffer, iter->username, orig_buffer_len);
1845 case PING_INFO_HOSTNAME:
1847 *buffer_len = strlen (iter->hostname) + 1;
1848 if (orig_buffer_len < *buffer_len)
1850 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1851 * will copy `*buffer_len' and pad the rest of
1852 * `buffer' with null-bytes */
1853 strncpy (buffer, iter->hostname, orig_buffer_len);
1857 case PING_INFO_ADDRESS:
1858 ret = getnameinfo ((struct sockaddr *) iter->addr,
1866 if ((ret == EAI_MEMORY)
1868 || (ret == EAI_OVERFLOW)
1872 #if defined(EAI_SYSTEM)
1873 else if (ret == EAI_SYSTEM)
1881 case PING_INFO_FAMILY:
1883 *buffer_len = sizeof (int);
1884 if (orig_buffer_len < sizeof (int))
1886 *((int *) buffer) = iter->addrfamily;
1890 case PING_INFO_LATENCY:
1892 *buffer_len = sizeof (double);
1893 if (orig_buffer_len < sizeof (double))
1895 *((double *) buffer) = iter->latency;
1899 case PING_INFO_DROPPED:
1901 *buffer_len = sizeof (uint32_t);
1902 if (orig_buffer_len < sizeof (uint32_t))
1904 *((uint32_t *) buffer) = iter->dropped;
1908 case PING_INFO_SEQUENCE:
1910 *buffer_len = sizeof (unsigned int);
1911 if (orig_buffer_len < sizeof (unsigned int))
1913 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1917 case PING_INFO_IDENT:
1919 *buffer_len = sizeof (uint16_t);
1920 if (orig_buffer_len < sizeof (uint16_t))
1922 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1926 case PING_INFO_DATA:
1928 *buffer_len = strlen (iter->data);
1929 if (orig_buffer_len < *buffer_len)
1931 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1935 case PING_INFO_RECV_TTL:
1937 *buffer_len = sizeof (int);
1938 if (orig_buffer_len < sizeof (int))
1940 *((int *) buffer) = iter->recv_ttl;
1944 case PING_INFO_RECV_QOS:
1946 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1947 if (!*buffer_len) *buffer_len=1;
1948 if (orig_buffer_len < *buffer_len)
1950 memcpy(buffer,&iter->recv_qos,*buffer_len);
1956 } /* ping_iterator_get_info */
1958 void *ping_iterator_get_context (pingobj_iter_t *iter)
1962 return (iter->context);
1965 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1969 iter->context = context;