2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2010 Florian octo Forster <octo at verplant.org>
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
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;
125 struct pinghost *next;
136 struct sockaddr *srcaddr;
137 socklen_t srcaddrlen;
141 char errmsg[PING_ERRMSG_LEN];
147 * private (static) functions
149 /* Even though Posix requires "strerror_r" to return an "int",
150 * some systems (e.g. the GNU libc) return a "char *" _and_
151 * ignore the second argument ... -tokkee */
152 static char *sstrerror (int errnum, char *buf, size_t buflen)
158 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
160 /* #endif !HAVE_STRERROR_R */
162 #elif STRERROR_R_CHAR_P
165 temp = strerror_r (errnum, buf, buflen);
168 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
169 strncpy (buf, temp, buflen);
171 strncpy (buf, "strerror_r did not return "
172 "an error message", buflen);
175 /* #endif STRERROR_R_CHAR_P */
178 if (strerror_r (errnum, buf, buflen) != 0)
180 snprintf (buf, buflen, "Error %i (%#x); "
181 "Additionally, strerror_r failed.",
184 #endif /* STRERROR_R_CHAR_P */
189 } /* char *sstrerror */
191 static void ping_set_error (pingobj_t *obj, const char *function,
194 snprintf (obj->errmsg, sizeof (obj->errmsg),
195 "%s: %s", function, message);
196 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
199 static void ping_set_errno (pingobj_t *obj, int error_number)
201 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
204 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
207 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
208 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
210 while (res->tv_usec > 1000000)
212 res->tv_usec -= 1000000;
219 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
222 if ((tv1->tv_sec < tv2->tv_sec)
223 || ((tv1->tv_sec == tv2->tv_sec)
224 && (tv1->tv_usec < tv2->tv_usec)))
227 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
228 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
230 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
232 while (res->tv_usec < 0)
234 res->tv_usec += 1000000;
241 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
248 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
253 *(char *) &ret = *(char *) ptr;
257 /* Do this twice to get all possible carries.. */
258 sum = (sum >> 16) + (sum & 0xFFFF);
259 sum = (sum >> 16) + (sum & 0xFFFF);
266 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
270 struct icmp *icmp_hdr;
274 uint16_t recv_checksum;
275 uint16_t calc_checksum;
282 if (buffer_len < sizeof (struct ip))
285 ip_hdr = (struct ip *) buffer;
286 ip_hdr_len = ip_hdr->ip_hl << 2;
288 if (buffer_len < ip_hdr_len)
291 buffer += ip_hdr_len;
292 buffer_len -= ip_hdr_len;
294 if (buffer_len < sizeof (struct icmp))
297 icmp_hdr = (struct icmp *) buffer;
298 buffer += sizeof (struct icmp);
299 buffer_len -= sizeof (struct icmp);
301 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
303 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
307 recv_checksum = icmp_hdr->icmp_cksum;
308 icmp_hdr->icmp_cksum = 0;
309 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
310 sizeof (struct icmp) + buffer_len);
312 if (recv_checksum != calc_checksum)
314 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
315 "calculated 0x%04"PRIx16"\n",
316 recv_checksum, calc_checksum);
320 ident = ntohs (icmp_hdr->icmp_id);
321 seq = ntohs (icmp_hdr->icmp_seq);
323 /* We have to iterate over all hosts, since ICMPv4 packets may
324 * be received on any raw v4 socket. */
325 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
327 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
328 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
330 if (ptr->addrfamily != AF_INET)
333 if (!timerisset (ptr->timer))
336 if (ptr->ident != ident)
339 if (((ptr->sequence - 1) & 0xFFFF) != seq)
342 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
344 ptr->hostname, ident, seq);
351 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
356 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
357 ptr->recv_tos = (uint8_t) ip_hdr->ip_tos;
362 #ifndef ICMP6_ECHO_REQUEST
363 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
364 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
366 # define ICMP6_ECHO_REQUEST 128
370 #ifndef ICMP6_ECHO_REPLY
371 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
372 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
374 # define ICMP6_ECHO_REPLY 129
378 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
381 struct icmp6_hdr *icmp_hdr;
388 if (buffer_len < sizeof (struct icmp6_hdr))
391 icmp_hdr = (struct icmp6_hdr *) buffer;
392 buffer += sizeof (struct icmp);
393 buffer_len -= sizeof (struct icmp);
395 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
397 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
401 if (icmp_hdr->icmp6_code != 0)
403 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
407 ident = ntohs (icmp_hdr->icmp6_id);
408 seq = ntohs (icmp_hdr->icmp6_seq);
410 /* We have to iterate over all hosts, since ICMPv6 packets may
411 * be received on any raw v6 socket. */
412 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
414 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
415 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
417 if (ptr->addrfamily != AF_INET6)
420 if (!timerisset (ptr->timer))
423 if (ptr->ident != ident)
426 if (((ptr->sequence - 1) & 0xFFFF) != seq)
429 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
431 ptr->hostname, ident, seq);
438 dprintf ("No match found for ident = 0x%04"PRIx16", "
446 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
449 /* Note: 'ph' is not necessarily the host object for which we receive a
450 * reply. The right object will be returned by ping_receive_ipv*(). For
451 * now, we can only rely on ph->fd and ph->addrfamily. */
454 pinghost_t *host = NULL;
459 * Set up the receive buffer..
461 struct msghdr msghdr;
462 struct cmsghdr *cmsg;
463 char payload_buffer[4096];
464 ssize_t payload_buffer_len;
465 char control_buffer[4096];
466 struct iovec payload_iovec;
468 memset (&payload_iovec, 0, sizeof (payload_iovec));
469 payload_iovec.iov_base = payload_buffer;
470 payload_iovec.iov_len = sizeof (payload_buffer);
472 memset (&msghdr, 0, sizeof (msghdr));
473 /* unspecified source address */
474 msghdr.msg_name = NULL;
475 msghdr.msg_namelen = 0;
476 /* output buffer vector, see readv(2) */
477 msghdr.msg_iov = &payload_iovec;
478 msghdr.msg_iovlen = 1;
479 /* output buffer for control messages */
480 msghdr.msg_control = control_buffer;
481 msghdr.msg_controllen = sizeof (control_buffer);
482 /* flags; this is an output only field.. */
483 msghdr.msg_flags = 0;
485 msghdr.msg_flags |= MSG_XPG4_2;
488 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
489 if (payload_buffer_len < 0)
492 char errbuf[PING_ERRMSG_LEN];
493 dprintf ("recvfrom: %s\n",
494 sstrerror (errno, errbuf, sizeof (errbuf)));
498 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
500 /* Iterate over all auxiliary data in msghdr */
503 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
505 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
507 if (ph->addrfamily == AF_INET) /* {{{ */
509 if (cmsg->cmsg_level != IPPROTO_IP)
512 if (cmsg->cmsg_type == IP_TOS)
514 memcpy (&recv_tos, CMSG_DATA (cmsg),
516 dprintf ("TOSv4 = %#04"PRIx8";\n", recv_tos);
518 if (cmsg->cmsg_type == IP_TTL)
520 memcpy (&recv_ttl, CMSG_DATA (cmsg),
522 dprintf ("TTLv4 = %i;\n", recv_ttl);
526 dprintf ("Not handling option %i.\n",
530 else if (ph->addrfamily == AF_INET6) /* {{{ */
532 if (cmsg->cmsg_level != IPPROTO_IPV6)
535 if (cmsg->cmsg_type == IPV6_RECVTCLASS)
537 memcpy (&recv_tos, CMSG_DATA (cmsg),
539 dprintf ("TOSv6 = %#04"PRIx8";\n", recv_tos);
541 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
543 memcpy (&recv_ttl, CMSG_DATA (cmsg),
545 dprintf ("TTLv6 = %i;\n", recv_ttl);
549 dprintf ("Not handling option %i.\n",
555 dprintf ("Don't know how to handle "
556 "unknown protocol %i.\n",
559 } /* }}} for (cmsg) */
561 if (ph->addrfamily == AF_INET)
563 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
567 else if (ph->addrfamily == AF_INET6)
569 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
575 dprintf ("ping_receive_one: Unknown address family %i.\n",
580 dprintf ("rcvd: %12i.%06i\n",
583 dprintf ("sent: %12i.%06i\n",
584 (int) host->timer->tv_sec,
585 (int) host->timer->tv_usec);
587 if (ping_timeval_sub (now, host->timer, &diff) < 0)
589 timerclear (host->timer);
593 dprintf ("diff: %12i.%06i\n",
598 host->recv_ttl = recv_ttl;
599 if (recv_tos != 0xffff)
600 host->recv_tos = recv_tos;
602 host->latency = ((double) diff.tv_usec) / 1000.0;
603 host->latency += ((double) diff.tv_sec) * 1000.0;
605 timerclear (host->timer);
610 static int ping_receive_all (pingobj_t *obj)
620 struct timeval endtime;
621 struct timeval nowtime;
622 struct timeval timeout;
630 for (ptr = ph; ptr != NULL; ptr = ptr->next)
636 if (gettimeofday (&nowtime, NULL) == -1)
638 ping_set_errno (obj, errno);
643 timeout.tv_sec = (time_t) obj->timeout;
644 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
646 dprintf ("Set timeout to %i.%06i seconds\n",
647 (int) timeout.tv_sec,
648 (int) timeout.tv_usec);
650 ping_timeval_add (&nowtime, &timeout, &endtime);
659 for (ptr = ph; ptr != NULL; ptr = ptr->next)
661 if (!timerisset (ptr->timer))
664 FD_SET (ptr->fd, &read_fds);
665 FD_SET (ptr->fd, &err_fds);
668 if (max_fd < ptr->fd)
675 if (gettimeofday (&nowtime, NULL) == -1)
677 ping_set_errno (obj, errno);
681 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
684 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
685 (int) timeout.tv_sec,
686 (int) timeout.tv_usec);
688 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
690 if (gettimeofday (&nowtime, NULL) == -1)
692 ping_set_errno (obj, errno);
696 if ((status == -1) && (errno == EINTR))
698 dprintf ("select was interrupted by signal..\n");
704 char errbuf[PING_ERRMSG_LEN];
705 dprintf ("select: %s\n",
706 sstrerror (errno, errbuf, sizeof (errbuf)));
710 else if (status == 0)
712 dprintf ("select timed out\n");
713 for (ptr = ph; ptr != NULL; ptr = ptr->next)
714 if (ptr->latency < 0.0)
719 for (ptr = ph; ptr != NULL; ptr = ptr->next)
721 if (FD_ISSET (ptr->fd, &read_fds))
723 if (ping_receive_one (obj, ptr, &nowtime) == 0)
726 else if (FD_ISSET (ptr->fd, &err_fds))
728 /* clear the timer in this case so that we
729 * don't run into an endless loop. */
730 /* TODO: Set an error flag in this case. */
731 timerclear (ptr->timer);
739 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
740 * Sending functions: *
743 * +-> ping_send_one_ipv4 *
744 * `-> ping_send_one_ipv6 *
745 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
746 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
747 const void *buf, size_t buflen)
751 if (gettimeofday (ph->timer, NULL) == -1)
753 timerclear (ph->timer);
757 ret = sendto (ph->fd, buf, buflen, 0,
758 (struct sockaddr *) ph->addr, ph->addrlen);
762 #if defined(EHOSTUNREACH)
763 if (errno == EHOSTUNREACH)
766 #if defined(ENETUNREACH)
767 if (errno == ENETUNREACH)
770 ping_set_errno (obj, errno);
776 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
787 dprintf ("ph->hostname = %s\n", ph->hostname);
789 memset (buf, '\0', sizeof (buf));
790 icmp4 = (struct icmp *) buf;
791 data = (char *) (icmp4 + 1);
793 icmp4->icmp_type = ICMP_ECHO;
794 icmp4->icmp_code = 0;
795 icmp4->icmp_cksum = 0;
796 icmp4->icmp_id = htons (ph->ident);
797 icmp4->icmp_seq = htons (ph->sequence);
799 buflen = 4096 - sizeof (struct icmp);
800 strncpy (data, ph->data, buflen);
801 datalen = strlen (data);
803 buflen = datalen + sizeof (struct icmp);
805 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
807 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
809 status = ping_sendto (obj, ph, buf, buflen);
812 perror ("ping_sendto");
816 dprintf ("sendto: status = %i\n", status);
821 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
823 struct icmp6_hdr *icmp6;
832 dprintf ("ph->hostname = %s\n", ph->hostname);
834 memset (buf, '\0', sizeof (buf));
835 icmp6 = (struct icmp6_hdr *) buf;
836 data = (char *) (icmp6 + 1);
838 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
839 icmp6->icmp6_code = 0;
840 /* The checksum will be calculated by the TCP/IP stack. */
842 icmp6->icmp6_cksum = 0;
843 icmp6->icmp6_id = htons (ph->ident);
844 icmp6->icmp6_seq = htons (ph->sequence);
846 buflen = 4096 - sizeof (struct icmp6_hdr);
847 strncpy (data, ph->data, buflen);
848 datalen = strlen (data);
850 buflen = datalen + sizeof (struct icmp6_hdr);
852 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
854 status = ping_sendto (obj, ph, buf, buflen);
857 perror ("ping_sendto");
861 dprintf ("sendto: status = %i\n", status);
866 static int ping_send_all (pingobj_t *obj)
876 for (ptr = ph; ptr != NULL; ptr = ptr->next)
878 /* start timer.. The GNU `ping6' starts the timer before
879 * sending the packet, so I will do that too */
880 if (gettimeofday (ptr->timer, NULL) == -1)
883 char errbuf[PING_ERRMSG_LEN];
884 dprintf ("gettimeofday: %s\n",
885 sstrerror (errno, errbuf, sizeof (errbuf)));
887 timerclear (ptr->timer);
893 dprintf ("timer set for hostname = %s\n", ptr->hostname);
896 if (ptr->addrfamily == AF_INET6)
898 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
899 if (ping_send_one_ipv6 (obj, ptr) != 0)
901 timerclear (ptr->timer);
906 else if (ptr->addrfamily == AF_INET)
908 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
909 if (ping_send_one_ipv4 (obj, ptr) != 0)
911 timerclear (ptr->timer);
916 else /* this should not happen */
918 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
919 timerclear (ptr->timer);
931 * Set the TTL of a socket protocol independently.
933 static int ping_set_ttl (pinghost_t *ph, int ttl)
937 if (ph->addrfamily == AF_INET)
939 dprintf ("Setting TTLv4 to %i\n", ttl);
940 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
943 else if (ph->addrfamily == AF_INET6)
945 dprintf ("Setting TTLv6 to %i\n", ttl);
946 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
954 * Set the TOS of a socket protocol independently.
956 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
957 * set this. See socket(7) for details.
959 static int ping_set_tos (pinghost_t *ph, uint8_t tos)
963 if (ph->addrfamily == AF_INET)
965 dprintf ("Setting TP_TOS to %i\n", ttl);
966 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
969 else if (ph->addrfamily == AF_INET6)
971 dprintf ("Setting IPV6_TCLASS to %i\n", ttl);
972 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
979 static int ping_get_ident (void)
982 static int did_seed = 0;
988 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
992 if (read (fd, &seed, sizeof (seed)) != -1)
995 dprintf ("Random seed: %#x\n", seed);
1004 char errbuf[PING_ERRMSG_LEN];
1005 dprintf ("open (/dev/urandom): %s\n",
1006 sstrerror (errno, errbuf, sizeof (errbuf)));
1011 retval = (int) random ();
1013 dprintf ("Random number: %#x\n", retval);
1018 static pinghost_t *ping_alloc (void)
1023 ph_size = sizeof (pinghost_t)
1024 + sizeof (struct sockaddr_storage)
1025 + sizeof (struct timeval);
1027 ph = (pinghost_t *) malloc (ph_size);
1031 memset (ph, '\0', ph_size);
1033 ph->timer = (struct timeval *) (ph + 1);
1034 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1036 ph->addrlen = sizeof (struct sockaddr_storage);
1040 ph->ident = ping_get_ident () & 0xFFFF;
1045 static void ping_free (pinghost_t *ph)
1050 if (ph->username != NULL)
1051 free (ph->username);
1053 if (ph->hostname != NULL)
1054 free (ph->hostname);
1056 if (ph->data != NULL)
1065 const char *ping_get_error (pingobj_t *obj)
1069 return (obj->errmsg);
1072 pingobj_t *ping_construct (void)
1076 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1078 memset (obj, 0, sizeof (pingobj_t));
1080 obj->timeout = PING_DEF_TIMEOUT;
1081 obj->ttl = PING_DEF_TTL;
1082 obj->addrfamily = PING_DEF_AF;
1083 obj->data = strdup (PING_DEF_DATA);
1089 void ping_destroy (pingobj_t *obj)
1091 pinghost_t *current;
1097 current = obj->head;
1100 while (current != NULL)
1102 next = current->next;
1103 ping_free (current);
1107 if (obj->data != NULL)
1110 if (obj->srcaddr != NULL)
1111 free (obj->srcaddr);
1113 if (obj->device != NULL)
1121 int ping_setopt (pingobj_t *obj, int option, void *value)
1125 if ((obj == NULL) || (value == NULL))
1134 obj->tos = *((uint8_t *) value);
1135 for (ph = obj->head; ph != NULL; ph = ph->next)
1136 ping_set_tos (ph, obj->tos);
1140 case PING_OPT_TIMEOUT:
1141 obj->timeout = *((double *) value);
1142 if (obj->timeout < 0.0)
1144 obj->timeout = PING_DEF_TIMEOUT;
1150 obj->ttl = *((int *) value);
1151 if ((obj->ttl < 1) || (obj->ttl > 255))
1153 obj->ttl = PING_DEF_TTL;
1160 for (ph = obj->head; ph != NULL; ph = ph->next)
1161 ping_set_ttl (ph, obj->ttl);
1166 obj->addrfamily = *((int *) value);
1167 if ((obj->addrfamily != AF_UNSPEC)
1168 && (obj->addrfamily != AF_INET)
1169 && (obj->addrfamily != AF_INET6))
1171 obj->addrfamily = PING_DEF_AF;
1174 if (obj->srcaddr != NULL)
1176 free (obj->srcaddr);
1177 obj->srcaddr = NULL;
1182 if (obj->data != NULL)
1187 obj->data = strdup ((const char *) value);
1190 case PING_OPT_SOURCE:
1192 char *hostname = (char *) value;
1193 struct addrinfo ai_hints;
1194 struct addrinfo *ai_list;
1197 if (obj->addrfamily != AF_UNSPEC)
1199 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1202 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1203 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1204 #if defined(AI_ADDRCONFIG)
1205 ai_hints.ai_flags = AI_ADDRCONFIG;
1207 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1210 #if defined(EAI_SYSTEM)
1211 char errbuf[PING_ERRMSG_LEN];
1213 ping_set_error (obj, "getaddrinfo",
1214 #if defined(EAI_SYSTEM)
1215 (status == EAI_SYSTEM)
1216 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1218 gai_strerror (status));
1223 if (ai_list->ai_next != NULL)
1225 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1228 if (obj->srcaddr == NULL)
1230 obj->srcaddrlen = 0;
1231 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1232 if (obj->srcaddr == NULL)
1234 ping_set_errno (obj, errno);
1236 freeaddrinfo (ai_list);
1240 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1241 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1242 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1243 ai_list->ai_addrlen);
1244 obj->srcaddrlen = ai_list->ai_addrlen;
1245 obj->addrfamily = ai_list->ai_family;
1247 freeaddrinfo (ai_list);
1248 } /* case PING_OPT_SOURCE */
1251 case PING_OPT_DEVICE:
1253 #ifdef SO_BINDTODEVICE
1254 char *device = strdup ((char *) value);
1258 ping_set_errno (obj, errno);
1263 if (obj->device != NULL)
1265 obj->device = device;
1266 #else /* ! SO_BINDTODEVICE */
1267 ping_set_errno (obj, ENOTSUP);
1269 #endif /* ! SO_BINDTODEVICE */
1270 } /* case PING_OPT_DEVICE */
1275 } /* switch (option) */
1278 } /* int ping_setopt */
1281 int ping_send (pingobj_t *obj)
1288 if (ping_send_all (obj) < 0)
1291 if ((ret = ping_receive_all (obj)) < 0)
1297 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1301 if (strcasecmp (ph->username, host) == 0)
1310 int ping_host_add (pingobj_t *obj, const char *host)
1314 struct addrinfo ai_hints;
1315 struct addrinfo *ai_list, *ai_ptr;
1318 if ((obj == NULL) || (host == NULL))
1321 dprintf ("host = %s\n", host);
1323 if (ping_host_search (obj->head, host) != NULL)
1326 memset (&ai_hints, '\0', sizeof (ai_hints));
1327 ai_hints.ai_flags = 0;
1328 #ifdef AI_ADDRCONFIG
1329 ai_hints.ai_flags |= AI_ADDRCONFIG;
1332 ai_hints.ai_flags |= AI_CANONNAME;
1334 ai_hints.ai_family = obj->addrfamily;
1335 ai_hints.ai_socktype = SOCK_RAW;
1337 if ((ph = ping_alloc ()) == NULL)
1339 dprintf ("Out of memory!\n");
1343 if ((ph->username = strdup (host)) == NULL)
1345 dprintf ("Out of memory!\n");
1346 ping_set_errno (obj, errno);
1351 if ((ph->hostname = strdup (host)) == NULL)
1353 dprintf ("Out of memory!\n");
1354 ping_set_errno (obj, errno);
1359 /* obj->data is not garuanteed to be != NULL */
1360 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1362 dprintf ("Out of memory!\n");
1363 ping_set_errno (obj, errno);
1368 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1370 #if defined(EAI_SYSTEM)
1371 char errbuf[PING_ERRMSG_LEN];
1373 dprintf ("getaddrinfo failed\n");
1374 ping_set_error (obj, "getaddrinfo",
1375 #if defined(EAI_SYSTEM)
1376 (ai_return == EAI_SYSTEM)
1377 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1379 gai_strerror (ai_return));
1384 if (ai_list == NULL)
1385 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1387 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1391 if (ai_ptr->ai_family == AF_INET)
1393 ai_ptr->ai_socktype = SOCK_RAW;
1394 ai_ptr->ai_protocol = IPPROTO_ICMP;
1396 else if (ai_ptr->ai_family == AF_INET6)
1398 ai_ptr->ai_socktype = SOCK_RAW;
1399 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1403 char errmsg[PING_ERRMSG_LEN];
1405 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1406 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1409 ping_set_error (obj, "getaddrinfo", errmsg);
1413 /* TODO: Move this to a static function `ping_open_socket' and
1414 * call it whenever the socket dies. */
1415 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1419 char errbuf[PING_ERRMSG_LEN];
1420 dprintf ("socket: %s\n",
1421 sstrerror (errno, errbuf, sizeof (errbuf)));
1423 ping_set_errno (obj, errno);
1427 if (obj->srcaddr != NULL)
1429 assert (obj->srcaddrlen > 0);
1430 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1432 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1435 char errbuf[PING_ERRMSG_LEN];
1436 dprintf ("bind: %s\n",
1437 sstrerror (errno, errbuf, sizeof (errbuf)));
1439 ping_set_errno (obj, errno);
1446 #ifdef SO_BINDTODEVICE
1447 if (obj->device != NULL)
1449 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1450 obj->device, strlen (obj->device) + 1) != 0)
1453 char errbuf[PING_ERRMSG_LEN];
1454 dprintf ("setsockopt: %s\n",
1455 sstrerror (errno, errbuf, sizeof (errbuf)));
1457 ping_set_errno (obj, errno);
1463 #endif /* SO_BINDTODEVICE */
1465 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1466 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1467 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1468 ph->addrlen = ai_ptr->ai_addrlen;
1469 ph->addrfamily = ai_ptr->ai_family;
1472 if ((ai_ptr->ai_canonname != NULL)
1473 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1477 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1478 ph->hostname, ai_ptr->ai_canonname);
1480 old_hostname = ph->hostname;
1481 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1483 /* strdup failed, falling back to old hostname */
1484 ph->hostname = old_hostname;
1486 else if (old_hostname != NULL)
1488 free (old_hostname);
1491 #endif /* AI_CANONNAME */
1493 if (ph->addrfamily == AF_INET)
1497 /* Enable receiving the TOS field */
1499 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1500 &opt, sizeof (opt));
1502 /* Enable receiving the TTL field */
1504 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1505 &opt, sizeof (opt));
1507 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1508 else if (ph->addrfamily == AF_INET6)
1512 # if defined(IPV6_RECVHOPLIMIT)
1513 /* For details see RFC 3542, section 6.3. */
1515 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1516 &opt, sizeof (opt));
1517 # endif /* IPV6_RECVHOPLIMIT */
1519 # if defined(IPV6_RECVTCLASS)
1520 /* For details see RFC 3542, section 6.5. */
1522 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1523 &opt, sizeof (opt));
1524 # endif /* IPV6_RECVTCLASS */
1526 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1529 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1531 freeaddrinfo (ai_list);
1540 * Adding in the front is much easier, but then the iterator will
1541 * return the host that was added last as first host. That's just not
1544 if (obj->head == NULL)
1553 while (hptr->next != NULL)
1556 assert ((hptr != NULL) && (hptr->next == NULL));
1560 ping_set_ttl (ph, obj->ttl);
1561 ping_set_tos (ph, obj->tos);
1564 } /* int ping_host_add */
1566 int ping_host_remove (pingobj_t *obj, const char *host)
1568 pinghost_t *pre, *cur;
1570 if ((obj == NULL) || (host == NULL))
1578 if (strcasecmp (host, cur->username) == 0)
1587 ping_set_error (obj, "ping_host_remove", "Host not found");
1592 obj->head = cur->next;
1594 pre->next = cur->next;
1601 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1605 return ((pingobj_iter_t *) obj->head);
1608 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1612 return ((pingobj_iter_t *) iter->next);
1615 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1616 void *buffer, size_t *buffer_len)
1620 size_t orig_buffer_len = *buffer_len;
1622 if ((iter == NULL) || (buffer_len == NULL))
1625 if ((buffer == NULL) && (*buffer_len != 0 ))
1630 case PING_INFO_USERNAME:
1632 *buffer_len = strlen (iter->username) + 1;
1633 if (orig_buffer_len <= *buffer_len)
1635 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1636 * will copy `*buffer_len' and pad the rest of
1637 * `buffer' with null-bytes */
1638 strncpy (buffer, iter->username, orig_buffer_len);
1642 case PING_INFO_HOSTNAME:
1644 *buffer_len = strlen (iter->hostname) + 1;
1645 if (orig_buffer_len < *buffer_len)
1647 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1648 * will copy `*buffer_len' and pad the rest of
1649 * `buffer' with null-bytes */
1650 strncpy (buffer, iter->hostname, orig_buffer_len);
1654 case PING_INFO_ADDRESS:
1655 ret = getnameinfo ((struct sockaddr *) iter->addr,
1663 if ((ret == EAI_MEMORY)
1665 || (ret == EAI_OVERFLOW)
1669 #if defined(EAI_SYSTEM)
1670 else if (ret == EAI_SYSTEM)
1678 case PING_INFO_FAMILY:
1680 *buffer_len = sizeof (int);
1681 if (orig_buffer_len < sizeof (int))
1683 *((int *) buffer) = iter->addrfamily;
1687 case PING_INFO_LATENCY:
1689 *buffer_len = sizeof (double);
1690 if (orig_buffer_len < sizeof (double))
1692 *((double *) buffer) = iter->latency;
1696 case PING_INFO_DROPPED:
1698 *buffer_len = sizeof (uint32_t);
1699 if (orig_buffer_len < sizeof (uint32_t))
1701 *((uint32_t *) buffer) = iter->dropped;
1705 case PING_INFO_SEQUENCE:
1707 *buffer_len = sizeof (unsigned int);
1708 if (orig_buffer_len < sizeof (unsigned int))
1710 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1714 case PING_INFO_IDENT:
1716 *buffer_len = sizeof (uint16_t);
1717 if (orig_buffer_len < sizeof (uint16_t))
1719 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1723 case PING_INFO_DATA:
1725 *buffer_len = strlen (iter->data);
1726 if (orig_buffer_len < *buffer_len)
1728 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1732 case PING_INFO_RECV_TTL:
1734 *buffer_len = sizeof (int);
1735 if (orig_buffer_len < sizeof (int))
1737 *((int *) buffer) = iter->recv_ttl;
1741 case PING_INFO_RECV_TOS:
1743 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1744 if (!*buffer_len) *buffer_len=1;
1745 if (orig_buffer_len < *buffer_len)
1747 memcpy(buffer,&iter->recv_tos,*buffer_len);
1753 } /* ping_iterator_get_info */
1755 void *ping_iterator_get_context (pingobj_iter_t *iter)
1759 return (iter->context);
1762 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1766 iter->context = context;