2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2009 Florian octo Forster <octo at verplant.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; only version 2 of the License is
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 # include <inttypes.h>
32 # error "You don't have the standard C99 header files installed"
33 #endif /* STDC_HEADERS */
47 # include <sys/types.h>
50 # include <sys/stat.h>
53 #if TIME_WITH_SYS_TIME
54 # include <sys/time.h>
58 # include <sys/time.h>
65 # include <sys/socket.h>
72 #if HAVE_NETINET_IN_SYSTM_H
73 # include <netinet/in_systm.h>
76 # include <netinet/in.h>
79 # include <netinet/ip.h>
81 #if HAVE_NETINET_IP_ICMP_H
82 # include <netinet/ip_icmp.h>
84 #ifdef HAVE_NETINET_IP_VAR_H
85 # include <netinet/ip_var.h>
87 #if HAVE_NETINET_IP6_H
88 # include <netinet/ip6.h>
90 #if HAVE_NETINET_ICMP6_H
91 # include <netinet/icmp6.h>
97 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
99 # define dprintf(...) /**/
102 #define PING_ERRMSG_LEN 256
106 /* username: name passed in by the user */
108 /* hostname: name returned by the reverse lookup */
110 struct sockaddr_storage *addr;
116 struct timeval *timer;
124 struct pinghost *next;
134 struct sockaddr *srcaddr;
135 socklen_t srcaddrlen;
139 char errmsg[PING_ERRMSG_LEN];
145 * private (static) functions
147 /* Even though Posix requires "strerror_r" to return an "int",
148 * some systems (e.g. the GNU libc) return a "char *" _and_
149 * ignore the second argument ... -tokkee */
150 static char *sstrerror (int errnum, char *buf, size_t buflen)
156 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
158 /* #endif !HAVE_STRERROR_R */
160 #elif STRERROR_R_CHAR_P
163 temp = strerror_r (errnum, buf, buflen);
166 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
167 strncpy (buf, temp, buflen);
169 strncpy (buf, "strerror_r did not return "
170 "an error message", buflen);
173 /* #endif STRERROR_R_CHAR_P */
176 if (strerror_r (errnum, buf, buflen) != 0)
178 snprintf (buf, buflen, "Error %i (%#x); "
179 "Additionally, strerror_r failed.",
182 #endif /* STRERROR_R_CHAR_P */
187 } /* char *sstrerror */
189 static void ping_set_error (pingobj_t *obj, const char *function,
192 snprintf (obj->errmsg, sizeof (obj->errmsg),
193 "%s: %s", function, message);
194 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
197 static void ping_set_errno (pingobj_t *obj, int error_number)
199 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
202 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
205 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
206 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
208 while (res->tv_usec > 1000000)
210 res->tv_usec -= 1000000;
217 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
220 if ((tv1->tv_sec < tv2->tv_sec)
221 || ((tv1->tv_sec == tv2->tv_sec)
222 && (tv1->tv_usec < tv2->tv_usec)))
225 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
226 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
228 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
230 while (res->tv_usec < 0)
232 res->tv_usec += 1000000;
239 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
246 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
251 *(char *) &ret = *(char *) ptr;
255 /* Do this twice to get all possible carries.. */
256 sum = (sum >> 16) + (sum & 0xFFFF);
257 sum = (sum >> 16) + (sum & 0xFFFF);
264 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
268 struct icmp *icmp_hdr;
272 uint16_t recv_checksum;
273 uint16_t calc_checksum;
280 if (buffer_len < sizeof (struct ip))
283 ip_hdr = (struct ip *) buffer;
284 ip_hdr_len = ip_hdr->ip_hl << 2;
286 if (buffer_len < ip_hdr_len)
289 buffer += ip_hdr_len;
290 buffer_len -= ip_hdr_len;
292 if (buffer_len < sizeof (struct icmp))
295 icmp_hdr = (struct icmp *) buffer;
296 buffer += sizeof (struct icmp);
297 buffer_len -= sizeof (struct icmp);
299 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
301 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
305 recv_checksum = icmp_hdr->icmp_cksum;
306 icmp_hdr->icmp_cksum = 0;
307 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
308 sizeof (struct icmp) + buffer_len);
310 if (recv_checksum != calc_checksum)
312 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
313 "calculated 0x%04"PRIx16"\n",
314 recv_checksum, calc_checksum);
318 ident = ntohs (icmp_hdr->icmp_id);
319 seq = ntohs (icmp_hdr->icmp_seq);
321 /* We have to iterate over all hosts, since ICMPv4 packets may
322 * be received on any raw v4 socket. */
323 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
325 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
326 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
328 if (ptr->addrfamily != AF_INET)
331 if (!timerisset (ptr->timer))
334 if (ptr->ident != ident)
337 if (((ptr->sequence - 1) & 0xFFFF) != seq)
340 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
342 ptr->hostname, ident, seq);
349 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
354 ptr->recv_ttl = ip_hdr->ip_ttl;
359 #ifndef ICMP6_ECHO_REQUEST
360 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
361 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
363 # define ICMP6_ECHO_REQUEST 128
367 #ifndef ICMP6_ECHO_REPLY
368 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
369 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
371 # define ICMP6_ECHO_REPLY 129
375 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
378 struct icmp6_hdr *icmp_hdr;
385 if (buffer_len < sizeof (struct icmp6_hdr))
388 icmp_hdr = (struct icmp6_hdr *) buffer;
389 buffer += sizeof (struct icmp);
390 buffer_len -= sizeof (struct icmp);
392 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
394 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
398 if (icmp_hdr->icmp6_code != 0)
400 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
404 ident = ntohs (icmp_hdr->icmp6_id);
405 seq = ntohs (icmp_hdr->icmp6_seq);
407 /* We have to iterate over all hosts, since ICMPv6 packets may
408 * be received on any raw v6 socket. */
409 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
411 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
412 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
414 if (ptr->addrfamily != AF_INET6)
417 if (!timerisset (ptr->timer))
420 if (ptr->ident != ident)
423 if (((ptr->sequence - 1) & 0xFFFF) != seq)
426 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
428 ptr->hostname, ident, seq);
435 dprintf ("No match found for ident = 0x%04"PRIx16", "
443 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
446 /* Note: 'ph' is not necessarily the host object for which we receive a
447 * reply. The right object will be returned by ping_receive_ipv*(). For
448 * now, we can only rely on ph->fd and ph->addrfamily. */
451 pinghost_t *host = NULL;
455 * Set up the receive buffer..
457 struct msghdr msghdr;
458 struct cmsghdr *cmsg;
459 char payload_buffer[4096];
460 ssize_t payload_buffer_len;
461 char control_buffer[4096];
462 struct iovec payload_iovec;
464 memset (&payload_iovec, 0, sizeof (payload_iovec));
465 payload_iovec.iov_base = payload_buffer;
466 payload_iovec.iov_len = sizeof (payload_buffer);
468 memset (&msghdr, 0, sizeof (msghdr));
469 /* unspecified source address */
470 msghdr.msg_name = NULL;
471 msghdr.msg_namelen = 0;
472 /* output buffer vector, see readv(2) */
473 msghdr.msg_iov = &payload_iovec;
474 msghdr.msg_iovlen = 1;
475 /* output buffer for control messages */
476 msghdr.msg_control = control_buffer;
477 msghdr.msg_controllen = sizeof (control_buffer);
478 /* flags; this is an output only field.. */
479 msghdr.msg_flags = 0;
481 msghdr.msg_flags |= MSG_XPG4_2;
484 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
485 if (payload_buffer_len < 0)
488 char errbuf[PING_ERRMSG_LEN];
489 dprintf ("recvfrom: %s\n",
490 sstrerror (errno, errbuf, sizeof (errbuf)));
494 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
496 /* Iterate over all auxiliary data in msghdr */
498 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
500 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
502 if (ph->addrfamily == AF_INET) /* {{{ */
504 if (cmsg->cmsg_level != IPPROTO_IP)
507 if (cmsg->cmsg_type == IP_TTL)
509 memcpy (&recv_ttl, CMSG_DATA (cmsg),
511 dprintf ("TTLv4 = %i;\n", recv_ttl);
515 dprintf ("Not handling option %i.\n",
519 else if (ph->addrfamily == AF_INET6) /* {{{ */
521 if (cmsg->cmsg_level != IPPROTO_IPV6)
524 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
526 memcpy (&recv_ttl, CMSG_DATA (cmsg),
528 dprintf ("TTLv6 = %i;\n", recv_ttl);
532 dprintf ("Not handling option %i.\n",
538 dprintf ("Don't know how to handle "
539 "unknown protocol %i.\n",
542 } /* }}} for (cmsg) */
544 if (ph->addrfamily == AF_INET)
546 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
550 else if (ph->addrfamily == AF_INET6)
552 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
558 dprintf ("ping_receive_one: Unknown address family %i.\n",
563 dprintf ("rcvd: %12i.%06i\n",
566 dprintf ("sent: %12i.%06i\n",
567 (int) host->timer->tv_sec,
568 (int) host->timer->tv_usec);
570 if (ping_timeval_sub (now, host->timer, &diff) < 0)
572 timerclear (host->timer);
576 dprintf ("diff: %12i.%06i\n",
581 host->recv_ttl = recv_ttl;
583 host->latency = ((double) diff.tv_usec) / 1000.0;
584 host->latency += ((double) diff.tv_sec) * 1000.0;
586 timerclear (host->timer);
591 static int ping_receive_all (pingobj_t *obj)
601 struct timeval endtime;
602 struct timeval nowtime;
603 struct timeval timeout;
611 for (ptr = ph; ptr != NULL; ptr = ptr->next)
617 if (gettimeofday (&nowtime, NULL) == -1)
619 ping_set_errno (obj, errno);
624 timeout.tv_sec = (time_t) obj->timeout;
625 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
627 dprintf ("Set timeout to %i.%06i seconds\n",
628 (int) timeout.tv_sec,
629 (int) timeout.tv_usec);
631 ping_timeval_add (&nowtime, &timeout, &endtime);
640 for (ptr = ph; ptr != NULL; ptr = ptr->next)
642 if (!timerisset (ptr->timer))
645 FD_SET (ptr->fd, &read_fds);
646 FD_SET (ptr->fd, &err_fds);
649 if (max_fd < ptr->fd)
656 if (gettimeofday (&nowtime, NULL) == -1)
658 ping_set_errno (obj, errno);
662 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
665 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
666 (int) timeout.tv_sec,
667 (int) timeout.tv_usec);
669 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
671 if (gettimeofday (&nowtime, NULL) == -1)
673 ping_set_errno (obj, errno);
677 if ((status == -1) && (errno == EINTR))
679 dprintf ("select was interrupted by signal..\n");
685 char errbuf[PING_ERRMSG_LEN];
686 dprintf ("select: %s\n",
687 sstrerror (errno, errbuf, sizeof (errbuf)));
691 else if (status == 0)
693 dprintf ("select timed out\n");
694 for (ptr = ph; ptr != NULL; ptr = ptr->next)
695 if (ptr->latency < 0.0)
700 for (ptr = ph; ptr != NULL; ptr = ptr->next)
702 if (FD_ISSET (ptr->fd, &read_fds))
704 if (ping_receive_one (obj, ptr, &nowtime) == 0)
707 else if (FD_ISSET (ptr->fd, &err_fds))
709 /* clear the timer in this case so that we
710 * don't run into an endless loop. */
711 /* TODO: Set an error flag in this case. */
712 timerclear (ptr->timer);
720 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
721 * Sending functions: *
724 * +-> ping_send_one_ipv4 *
725 * `-> ping_send_one_ipv6 *
726 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
727 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
728 const void *buf, size_t buflen)
732 if (gettimeofday (ph->timer, NULL) == -1)
734 timerclear (ph->timer);
738 ret = sendto (ph->fd, buf, buflen, 0,
739 (struct sockaddr *) ph->addr, ph->addrlen);
743 #if defined(EHOSTUNREACH)
744 if (errno == EHOSTUNREACH)
747 #if defined(ENETUNREACH)
748 if (errno == ENETUNREACH)
751 ping_set_errno (obj, errno);
757 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
768 dprintf ("ph->hostname = %s\n", ph->hostname);
770 memset (buf, '\0', sizeof (buf));
771 icmp4 = (struct icmp *) buf;
772 data = (char *) (icmp4 + 1);
774 icmp4->icmp_type = ICMP_ECHO;
775 icmp4->icmp_code = 0;
776 icmp4->icmp_cksum = 0;
777 icmp4->icmp_id = htons (ph->ident);
778 icmp4->icmp_seq = htons (ph->sequence);
780 buflen = 4096 - sizeof (struct icmp);
781 strncpy (data, ph->data, buflen);
782 datalen = strlen (data);
784 buflen = datalen + sizeof (struct icmp);
786 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
788 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
790 status = ping_sendto (obj, ph, buf, buflen);
793 perror ("ping_sendto");
797 dprintf ("sendto: status = %i\n", status);
802 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
804 struct icmp6_hdr *icmp6;
813 dprintf ("ph->hostname = %s\n", ph->hostname);
815 memset (buf, '\0', sizeof (buf));
816 icmp6 = (struct icmp6_hdr *) buf;
817 data = (char *) (icmp6 + 1);
819 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
820 icmp6->icmp6_code = 0;
821 /* The checksum will be calculated by the TCP/IP stack. */
823 icmp6->icmp6_cksum = 0;
824 icmp6->icmp6_id = htons (ph->ident);
825 icmp6->icmp6_seq = htons (ph->sequence);
827 buflen = 4096 - sizeof (struct icmp6_hdr);
828 strncpy (data, ph->data, buflen);
829 datalen = strlen (data);
831 buflen = datalen + sizeof (struct icmp6_hdr);
833 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
835 status = ping_sendto (obj, ph, buf, buflen);
838 perror ("ping_sendto");
842 dprintf ("sendto: status = %i\n", status);
847 static int ping_send_all (pingobj_t *obj)
857 for (ptr = ph; ptr != NULL; ptr = ptr->next)
859 /* start timer.. The GNU `ping6' starts the timer before
860 * sending the packet, so I will do that too */
861 if (gettimeofday (ptr->timer, NULL) == -1)
864 char errbuf[PING_ERRMSG_LEN];
865 dprintf ("gettimeofday: %s\n",
866 sstrerror (errno, errbuf, sizeof (errbuf)));
868 timerclear (ptr->timer);
874 dprintf ("timer set for hostname = %s\n", ptr->hostname);
877 if (ptr->addrfamily == AF_INET6)
879 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
880 if (ping_send_one_ipv6 (obj, ptr) != 0)
882 timerclear (ptr->timer);
887 else if (ptr->addrfamily == AF_INET)
889 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
890 if (ping_send_one_ipv4 (obj, ptr) != 0)
892 timerclear (ptr->timer);
897 else /* this should not happen */
899 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
900 timerclear (ptr->timer);
912 * Set the TTL of a socket protocol independently.
914 static int ping_set_ttl (pinghost_t *ph, int ttl)
918 if (ph->addrfamily == AF_INET)
920 dprintf ("Setting TTLv4 to %i\n", ttl);
921 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
924 else if (ph->addrfamily == AF_INET6)
926 dprintf ("Setting TTLv6 to %i\n", ttl);
927 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
934 static int ping_get_ident (void)
937 static int did_seed = 0;
943 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
947 if (read (fd, &seed, sizeof (seed)) != -1)
950 dprintf ("Random seed: %#x\n", seed);
959 char errbuf[PING_ERRMSG_LEN];
960 dprintf ("open (/dev/urandom): %s\n",
961 sstrerror (errno, errbuf, sizeof (errbuf)));
966 retval = (int) random ();
968 dprintf ("Random number: %#x\n", retval);
973 static pinghost_t *ping_alloc (void)
978 ph_size = sizeof (pinghost_t)
979 + sizeof (struct sockaddr_storage)
980 + sizeof (struct timeval);
982 ph = (pinghost_t *) malloc (ph_size);
986 memset (ph, '\0', ph_size);
988 ph->timer = (struct timeval *) (ph + 1);
989 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
991 ph->addrlen = sizeof (struct sockaddr_storage);
995 ph->ident = ping_get_ident () & 0xFFFF;
1000 static void ping_free (pinghost_t *ph)
1005 if (ph->username != NULL)
1006 free (ph->username);
1008 if (ph->hostname != NULL)
1009 free (ph->hostname);
1011 if (ph->data != NULL)
1020 const char *ping_get_error (pingobj_t *obj)
1024 return (obj->errmsg);
1027 pingobj_t *ping_construct (void)
1031 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1033 memset (obj, '\0', sizeof (pingobj_t));
1035 obj->timeout = PING_DEF_TIMEOUT;
1036 obj->ttl = PING_DEF_TTL;
1037 obj->addrfamily = PING_DEF_AF;
1038 obj->data = strdup (PING_DEF_DATA);
1043 void ping_destroy (pingobj_t *obj)
1045 pinghost_t *current;
1051 current = obj->head;
1054 while (current != NULL)
1056 next = current->next;
1057 ping_free (current);
1061 if (obj->data != NULL)
1064 if (obj->srcaddr != NULL)
1065 free (obj->srcaddr);
1067 if (obj->device != NULL)
1075 int ping_setopt (pingobj_t *obj, int option, void *value)
1079 if ((obj == NULL) || (value == NULL))
1084 case PING_OPT_TIMEOUT:
1085 obj->timeout = *((double *) value);
1086 if (obj->timeout < 0.0)
1088 obj->timeout = PING_DEF_TIMEOUT;
1094 obj->ttl = *((int *) value);
1095 if ((obj->ttl < 1) || (obj->ttl > 255))
1097 obj->ttl = PING_DEF_TTL;
1104 for (ph = obj->head; ph != NULL; ph = ph->next)
1105 ping_set_ttl (ph, obj->ttl);
1110 obj->addrfamily = *((int *) value);
1111 if ((obj->addrfamily != AF_UNSPEC)
1112 && (obj->addrfamily != AF_INET)
1113 && (obj->addrfamily != AF_INET6))
1115 obj->addrfamily = PING_DEF_AF;
1118 if (obj->srcaddr != NULL)
1120 free (obj->srcaddr);
1121 obj->srcaddr = NULL;
1126 if (obj->data != NULL)
1131 obj->data = strdup ((const char *) value);
1134 case PING_OPT_SOURCE:
1136 char *hostname = (char *) value;
1137 struct addrinfo ai_hints;
1138 struct addrinfo *ai_list;
1141 if (obj->addrfamily != AF_UNSPEC)
1143 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1146 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1147 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1148 #if defined(AI_ADDRCONFIG)
1149 ai_hints.ai_flags = AI_ADDRCONFIG;
1151 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1154 #if defined(EAI_SYSTEM)
1155 char errbuf[PING_ERRMSG_LEN];
1157 ping_set_error (obj, "getaddrinfo",
1158 #if defined(EAI_SYSTEM)
1159 (status == EAI_SYSTEM)
1160 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1162 gai_strerror (status));
1167 if (ai_list->ai_next != NULL)
1169 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1172 if (obj->srcaddr == NULL)
1174 obj->srcaddrlen = 0;
1175 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1176 if (obj->srcaddr == NULL)
1178 ping_set_errno (obj, errno);
1180 freeaddrinfo (ai_list);
1184 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1185 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1186 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1187 ai_list->ai_addrlen);
1188 obj->srcaddrlen = ai_list->ai_addrlen;
1189 obj->addrfamily = ai_list->ai_family;
1191 freeaddrinfo (ai_list);
1192 } /* case PING_OPT_SOURCE */
1195 case PING_OPT_DEVICE:
1197 #ifdef SO_BINDTODEVICE
1198 char *device = strdup ((char *) value);
1202 ping_set_errno (obj, errno);
1207 if (obj->device != NULL)
1209 obj->device = device;
1210 #else /* ! SO_BINDTODEVICE */
1211 ping_set_errno (obj, ENOTSUP);
1213 #endif /* ! SO_BINDTODEVICE */
1214 } /* case PING_OPT_DEVICE */
1219 } /* switch (option) */
1222 } /* int ping_setopt */
1225 int ping_send (pingobj_t *obj)
1232 if (ping_send_all (obj) < 0)
1235 if ((ret = ping_receive_all (obj)) < 0)
1241 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1245 if (strcasecmp (ph->username, host) == 0)
1254 int ping_host_add (pingobj_t *obj, const char *host)
1258 struct addrinfo ai_hints;
1259 struct addrinfo *ai_list, *ai_ptr;
1262 if ((obj == NULL) || (host == NULL))
1265 dprintf ("host = %s\n", host);
1267 if (ping_host_search (obj->head, host) != NULL)
1270 memset (&ai_hints, '\0', sizeof (ai_hints));
1271 ai_hints.ai_flags = 0;
1272 #ifdef AI_ADDRCONFIG
1273 ai_hints.ai_flags |= AI_ADDRCONFIG;
1276 ai_hints.ai_flags |= AI_CANONNAME;
1278 ai_hints.ai_family = obj->addrfamily;
1279 ai_hints.ai_socktype = SOCK_RAW;
1281 if ((ph = ping_alloc ()) == NULL)
1283 dprintf ("Out of memory!\n");
1287 if ((ph->username = strdup (host)) == NULL)
1289 dprintf ("Out of memory!\n");
1290 ping_set_errno (obj, errno);
1295 if ((ph->hostname = strdup (host)) == NULL)
1297 dprintf ("Out of memory!\n");
1298 ping_set_errno (obj, errno);
1303 /* obj->data is not garuanteed to be != NULL */
1304 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1306 dprintf ("Out of memory!\n");
1307 ping_set_errno (obj, errno);
1312 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1314 #if defined(EAI_SYSTEM)
1315 char errbuf[PING_ERRMSG_LEN];
1317 dprintf ("getaddrinfo failed\n");
1318 ping_set_error (obj, "getaddrinfo",
1319 #if defined(EAI_SYSTEM)
1320 (ai_return == EAI_SYSTEM)
1321 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1323 gai_strerror (ai_return));
1328 if (ai_list == NULL)
1329 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1331 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1335 if (ai_ptr->ai_family == AF_INET)
1337 ai_ptr->ai_socktype = SOCK_RAW;
1338 ai_ptr->ai_protocol = IPPROTO_ICMP;
1340 else if (ai_ptr->ai_family == AF_INET6)
1342 ai_ptr->ai_socktype = SOCK_RAW;
1343 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1347 char errmsg[PING_ERRMSG_LEN];
1349 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1350 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1353 ping_set_error (obj, "getaddrinfo", errmsg);
1357 /* TODO: Move this to a static function `ping_open_socket' and
1358 * call it whenever the socket dies. */
1359 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1363 char errbuf[PING_ERRMSG_LEN];
1364 dprintf ("socket: %s\n",
1365 sstrerror (errno, errbuf, sizeof (errbuf)));
1367 ping_set_errno (obj, errno);
1371 if (obj->srcaddr != NULL)
1373 assert (obj->srcaddrlen > 0);
1374 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1376 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1379 char errbuf[PING_ERRMSG_LEN];
1380 dprintf ("bind: %s\n",
1381 sstrerror (errno, errbuf, sizeof (errbuf)));
1383 ping_set_errno (obj, errno);
1390 #ifdef SO_BINDTODEVICE
1391 if (obj->device != NULL)
1393 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1394 obj->device, strlen (obj->device) + 1) != 0)
1397 char errbuf[PING_ERRMSG_LEN];
1398 dprintf ("setsockopt: %s\n",
1399 sstrerror (errno, errbuf, sizeof (errbuf)));
1401 ping_set_errno (obj, errno);
1407 #endif /* SO_BINDTODEVICE */
1409 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1410 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1411 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1412 ph->addrlen = ai_ptr->ai_addrlen;
1413 ph->addrfamily = ai_ptr->ai_family;
1416 if ((ai_ptr->ai_canonname != NULL)
1417 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1421 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1422 ph->hostname, ai_ptr->ai_canonname);
1424 old_hostname = ph->hostname;
1425 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1427 /* strdup failed, falling back to old hostname */
1428 ph->hostname = old_hostname;
1430 else if (old_hostname != NULL)
1432 free (old_hostname);
1435 #endif /* AI_CANONNAME */
1437 if (ph->addrfamily == AF_INET)
1441 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1442 &opt, sizeof (opt));
1444 #if defined(IPPROTO_IPV6) && defined(IPV6_RECVHOPLIMIT)
1445 else if (ph->addrfamily == AF_INET6)
1449 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1450 &opt, sizeof (opt));
1457 freeaddrinfo (ai_list);
1466 * Adding in the front is much easier, but then the iterator will
1467 * return the host that was added last as first host. That's just not
1470 if (obj->head == NULL)
1479 while (hptr->next != NULL)
1482 assert ((hptr != NULL) && (hptr->next == NULL));
1486 ping_set_ttl (ph, obj->ttl);
1489 } /* int ping_host_add */
1491 int ping_host_remove (pingobj_t *obj, const char *host)
1493 pinghost_t *pre, *cur;
1495 if ((obj == NULL) || (host == NULL))
1503 if (strcasecmp (host, cur->username) == 0)
1512 ping_set_error (obj, "ping_host_remove", "Host not found");
1517 obj->head = cur->next;
1519 pre->next = cur->next;
1526 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1530 return ((pingobj_iter_t *) obj->head);
1533 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1537 return ((pingobj_iter_t *) iter->next);
1540 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1541 void *buffer, size_t *buffer_len)
1545 size_t orig_buffer_len = *buffer_len;
1547 if ((iter == NULL) || (buffer_len == NULL))
1550 if ((buffer == NULL) && (*buffer_len != 0 ))
1555 case PING_INFO_USERNAME:
1557 *buffer_len = strlen (iter->username) + 1;
1558 if (orig_buffer_len <= *buffer_len)
1560 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1561 * will copy `*buffer_len' and pad the rest of
1562 * `buffer' with null-bytes */
1563 strncpy (buffer, iter->username, orig_buffer_len);
1567 case PING_INFO_HOSTNAME:
1569 *buffer_len = strlen (iter->hostname) + 1;
1570 if (orig_buffer_len < *buffer_len)
1572 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1573 * will copy `*buffer_len' and pad the rest of
1574 * `buffer' with null-bytes */
1575 strncpy (buffer, iter->hostname, orig_buffer_len);
1579 case PING_INFO_ADDRESS:
1580 ret = getnameinfo ((struct sockaddr *) iter->addr,
1588 if ((ret == EAI_MEMORY)
1590 || (ret == EAI_OVERFLOW)
1594 #if defined(EAI_SYSTEM)
1595 else if (ret == EAI_SYSTEM)
1603 case PING_INFO_FAMILY:
1605 *buffer_len = sizeof (int);
1606 if (orig_buffer_len < sizeof (int))
1608 *((int *) buffer) = iter->addrfamily;
1612 case PING_INFO_LATENCY:
1614 *buffer_len = sizeof (double);
1615 if (orig_buffer_len < sizeof (double))
1617 *((double *) buffer) = iter->latency;
1621 case PING_INFO_DROPPED:
1623 *buffer_len = sizeof (uint32_t);
1624 if (orig_buffer_len < sizeof (uint32_t))
1626 *((uint32_t *) buffer) = iter->dropped;
1630 case PING_INFO_SEQUENCE:
1632 *buffer_len = sizeof (unsigned int);
1633 if (orig_buffer_len < sizeof (unsigned int))
1635 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1639 case PING_INFO_IDENT:
1641 *buffer_len = sizeof (uint16_t);
1642 if (orig_buffer_len < sizeof (uint16_t))
1644 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1648 case PING_INFO_DATA:
1650 *buffer_len = strlen (iter->data);
1651 if (orig_buffer_len < *buffer_len)
1653 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1657 case PING_INFO_RECV_TTL:
1659 *buffer_len = sizeof (int);
1660 if (orig_buffer_len < sizeof (int))
1662 *((int *) buffer) = iter->recv_ttl;
1668 } /* ping_iterator_get_info */
1670 void *ping_iterator_get_context (pingobj_iter_t *iter)
1674 return (iter->context);
1677 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1681 iter->context = context;