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_qos = (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. */
453 struct timeval diff, pkt_now = *now;
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))
508 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SO_TIMESTAMP)
509 memcpy(&pkt_now, CMSG_DATA(cmsg), sizeof(pkt_now));
510 #endif /* SO_TIMESTAMP */
512 if (ph->addrfamily == AF_INET) /* {{{ */
514 if (cmsg->cmsg_level != IPPROTO_IP)
517 if (cmsg->cmsg_type == IP_TOS)
519 memcpy (&recv_qos, CMSG_DATA (cmsg),
521 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
523 if (cmsg->cmsg_type == IP_TTL)
525 memcpy (&recv_ttl, CMSG_DATA (cmsg),
527 dprintf ("TTLv4 = %i;\n", recv_ttl);
531 dprintf ("Not handling option %i.\n",
535 else if (ph->addrfamily == AF_INET6) /* {{{ */
537 if (cmsg->cmsg_level != IPPROTO_IPV6)
540 if (cmsg->cmsg_type == IPV6_TCLASS)
542 memcpy (&recv_qos, CMSG_DATA (cmsg),
544 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
546 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
548 memcpy (&recv_ttl, CMSG_DATA (cmsg),
550 dprintf ("TTLv6 = %i;\n", recv_ttl);
554 dprintf ("Not handling option %i.\n",
560 dprintf ("Don't know how to handle "
561 "unknown protocol %i.\n",
564 } /* }}} for (cmsg) */
566 if (ph->addrfamily == AF_INET)
568 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
572 else if (ph->addrfamily == AF_INET6)
574 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
580 dprintf ("ping_receive_one: Unknown address family %i.\n",
585 dprintf ("rcvd: %12i.%06i\n",
586 (int) pkt_now.tv_sec,
587 (int) pkt_now.tv_usec);
588 dprintf ("sent: %12i.%06i\n",
589 (int) host->timer->tv_sec,
590 (int) host->timer->tv_usec);
592 if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
594 timerclear (host->timer);
598 dprintf ("diff: %12i.%06i\n",
603 host->recv_ttl = recv_ttl;
604 host->recv_qos = recv_qos;
606 host->latency = ((double) diff.tv_usec) / 1000.0;
607 host->latency += ((double) diff.tv_sec) * 1000.0;
609 timerclear (host->timer);
614 static int ping_receive_all (pingobj_t *obj)
624 struct timeval endtime;
625 struct timeval nowtime;
626 struct timeval timeout;
634 for (ptr = ph; ptr != NULL; ptr = ptr->next)
640 if (gettimeofday (&nowtime, NULL) == -1)
642 ping_set_errno (obj, errno);
647 timeout.tv_sec = (time_t) obj->timeout;
648 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
650 dprintf ("Set timeout to %i.%06i seconds\n",
651 (int) timeout.tv_sec,
652 (int) timeout.tv_usec);
654 ping_timeval_add (&nowtime, &timeout, &endtime);
663 for (ptr = ph; ptr != NULL; ptr = ptr->next)
665 if (!timerisset (ptr->timer))
668 FD_SET (ptr->fd, &read_fds);
669 FD_SET (ptr->fd, &err_fds);
672 if (max_fd < ptr->fd)
679 if (gettimeofday (&nowtime, NULL) == -1)
681 ping_set_errno (obj, errno);
685 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
688 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
689 (int) timeout.tv_sec,
690 (int) timeout.tv_usec);
692 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
694 if (gettimeofday (&nowtime, NULL) == -1)
696 ping_set_errno (obj, errno);
700 if ((status == -1) && (errno == EINTR))
702 dprintf ("select was interrupted by signal..\n");
708 char errbuf[PING_ERRMSG_LEN];
709 dprintf ("select: %s\n",
710 sstrerror (errno, errbuf, sizeof (errbuf)));
714 else if (status == 0)
716 dprintf ("select timed out\n");
717 for (ptr = ph; ptr != NULL; ptr = ptr->next)
718 if (ptr->latency < 0.0)
723 for (ptr = ph; ptr != NULL; ptr = ptr->next)
725 if (FD_ISSET (ptr->fd, &read_fds))
727 if (ping_receive_one (obj, ptr, &nowtime) == 0)
730 else if (FD_ISSET (ptr->fd, &err_fds))
732 /* clear the timer in this case so that we
733 * don't run into an endless loop. */
734 /* TODO: Set an error flag in this case. */
735 timerclear (ptr->timer);
743 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
744 * Sending functions: *
747 * +-> ping_send_one_ipv4 *
748 * `-> ping_send_one_ipv6 *
749 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
750 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
751 const void *buf, size_t buflen)
755 if (gettimeofday (ph->timer, NULL) == -1)
757 timerclear (ph->timer);
761 ret = sendto (ph->fd, buf, buflen, 0,
762 (struct sockaddr *) ph->addr, ph->addrlen);
766 #if defined(EHOSTUNREACH)
767 if (errno == EHOSTUNREACH)
770 #if defined(ENETUNREACH)
771 if (errno == ENETUNREACH)
774 ping_set_errno (obj, errno);
780 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
791 dprintf ("ph->hostname = %s\n", ph->hostname);
793 memset (buf, '\0', sizeof (buf));
794 icmp4 = (struct icmp *) buf;
795 data = (char *) (icmp4 + 1);
797 icmp4->icmp_type = ICMP_ECHO;
798 icmp4->icmp_code = 0;
799 icmp4->icmp_cksum = 0;
800 icmp4->icmp_id = htons (ph->ident);
801 icmp4->icmp_seq = htons (ph->sequence);
803 buflen = 4096 - sizeof (struct icmp);
804 strncpy (data, ph->data, buflen);
805 datalen = strlen (data);
807 buflen = datalen + sizeof (struct icmp);
809 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
811 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
813 status = ping_sendto (obj, ph, buf, buflen);
816 perror ("ping_sendto");
820 dprintf ("sendto: status = %i\n", status);
825 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
827 struct icmp6_hdr *icmp6;
836 dprintf ("ph->hostname = %s\n", ph->hostname);
838 memset (buf, '\0', sizeof (buf));
839 icmp6 = (struct icmp6_hdr *) buf;
840 data = (char *) (icmp6 + 1);
842 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
843 icmp6->icmp6_code = 0;
844 /* The checksum will be calculated by the TCP/IP stack. */
846 icmp6->icmp6_cksum = 0;
847 icmp6->icmp6_id = htons (ph->ident);
848 icmp6->icmp6_seq = htons (ph->sequence);
850 buflen = 4096 - sizeof (struct icmp6_hdr);
851 strncpy (data, ph->data, buflen);
852 datalen = strlen (data);
854 buflen = datalen + sizeof (struct icmp6_hdr);
856 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
858 status = ping_sendto (obj, ph, buf, buflen);
861 perror ("ping_sendto");
865 dprintf ("sendto: status = %i\n", status);
870 static int ping_send_all (pingobj_t *obj)
880 for (ptr = ph; ptr != NULL; ptr = ptr->next)
882 /* start timer.. The GNU `ping6' starts the timer before
883 * sending the packet, so I will do that too */
884 if (gettimeofday (ptr->timer, NULL) == -1)
887 char errbuf[PING_ERRMSG_LEN];
888 dprintf ("gettimeofday: %s\n",
889 sstrerror (errno, errbuf, sizeof (errbuf)));
891 timerclear (ptr->timer);
897 dprintf ("timer set for hostname = %s\n", ptr->hostname);
900 if (ptr->addrfamily == AF_INET6)
902 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
903 if (ping_send_one_ipv6 (obj, ptr) != 0)
905 timerclear (ptr->timer);
910 else if (ptr->addrfamily == AF_INET)
912 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
913 if (ping_send_one_ipv4 (obj, ptr) != 0)
915 timerclear (ptr->timer);
920 else /* this should not happen */
922 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
923 timerclear (ptr->timer);
935 * Set the TTL of a socket protocol independently.
937 static int ping_set_ttl (pinghost_t *ph, int ttl)
941 if (ph->addrfamily == AF_INET)
943 dprintf ("Setting TTLv4 to %i\n", ttl);
944 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
947 else if (ph->addrfamily == AF_INET6)
949 dprintf ("Setting TTLv6 to %i\n", ttl);
950 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
958 * Set the TOS of a socket protocol independently.
960 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
961 * set this. See socket(7) for details.
963 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
966 char errbuf[PING_ERRMSG_LEN];
968 if (ph->addrfamily == AF_INET)
970 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
971 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
976 ping_set_error (obj, "ping_set_qos",
977 sstrerror (ret, errbuf, sizeof (errbuf)));
978 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
981 else if (ph->addrfamily == AF_INET6)
983 /* IPV6_TCLASS requires an "int". */
986 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
987 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
992 ping_set_error (obj, "ping_set_qos",
993 sstrerror (ret, errbuf, sizeof (errbuf)));
994 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1001 static int ping_get_ident (void)
1004 static int did_seed = 0;
1010 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1014 if (read (fd, &seed, sizeof (seed)) != -1)
1017 dprintf ("Random seed: %#x\n", seed);
1026 char errbuf[PING_ERRMSG_LEN];
1027 dprintf ("open (/dev/urandom): %s\n",
1028 sstrerror (errno, errbuf, sizeof (errbuf)));
1033 retval = (int) random ();
1035 dprintf ("Random number: %#x\n", retval);
1040 static pinghost_t *ping_alloc (void)
1045 ph_size = sizeof (pinghost_t)
1046 + sizeof (struct sockaddr_storage)
1047 + sizeof (struct timeval);
1049 ph = (pinghost_t *) malloc (ph_size);
1053 memset (ph, '\0', ph_size);
1055 ph->timer = (struct timeval *) (ph + 1);
1056 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1058 ph->addrlen = sizeof (struct sockaddr_storage);
1062 ph->ident = ping_get_ident () & 0xFFFF;
1067 static void ping_free (pinghost_t *ph)
1072 if (ph->username != NULL)
1073 free (ph->username);
1075 if (ph->hostname != NULL)
1076 free (ph->hostname);
1078 if (ph->data != NULL)
1087 const char *ping_get_error (pingobj_t *obj)
1091 return (obj->errmsg);
1094 pingobj_t *ping_construct (void)
1098 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1100 memset (obj, 0, sizeof (pingobj_t));
1102 obj->timeout = PING_DEF_TIMEOUT;
1103 obj->ttl = PING_DEF_TTL;
1104 obj->addrfamily = PING_DEF_AF;
1105 obj->data = strdup (PING_DEF_DATA);
1111 void ping_destroy (pingobj_t *obj)
1113 pinghost_t *current;
1119 current = obj->head;
1122 while (current != NULL)
1124 next = current->next;
1125 ping_free (current);
1129 if (obj->data != NULL)
1132 if (obj->srcaddr != NULL)
1133 free (obj->srcaddr);
1135 if (obj->device != NULL)
1143 int ping_setopt (pingobj_t *obj, int option, void *value)
1147 if ((obj == NULL) || (value == NULL))
1156 obj->qos = *((uint8_t *) value);
1157 for (ph = obj->head; ph != NULL; ph = ph->next)
1158 ping_set_qos (obj, ph, obj->qos);
1162 case PING_OPT_TIMEOUT:
1163 obj->timeout = *((double *) value);
1164 if (obj->timeout < 0.0)
1166 obj->timeout = PING_DEF_TIMEOUT;
1172 obj->ttl = *((int *) value);
1173 if ((obj->ttl < 1) || (obj->ttl > 255))
1175 obj->ttl = PING_DEF_TTL;
1182 for (ph = obj->head; ph != NULL; ph = ph->next)
1183 ping_set_ttl (ph, obj->ttl);
1188 obj->addrfamily = *((int *) value);
1189 if ((obj->addrfamily != AF_UNSPEC)
1190 && (obj->addrfamily != AF_INET)
1191 && (obj->addrfamily != AF_INET6))
1193 obj->addrfamily = PING_DEF_AF;
1196 if (obj->srcaddr != NULL)
1198 free (obj->srcaddr);
1199 obj->srcaddr = NULL;
1204 if (obj->data != NULL)
1209 obj->data = strdup ((const char *) value);
1212 case PING_OPT_SOURCE:
1214 char *hostname = (char *) value;
1215 struct addrinfo ai_hints;
1216 struct addrinfo *ai_list;
1219 if (obj->addrfamily != AF_UNSPEC)
1221 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1224 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1225 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1226 #if defined(AI_ADDRCONFIG)
1227 ai_hints.ai_flags = AI_ADDRCONFIG;
1229 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1232 #if defined(EAI_SYSTEM)
1233 char errbuf[PING_ERRMSG_LEN];
1235 ping_set_error (obj, "getaddrinfo",
1236 #if defined(EAI_SYSTEM)
1237 (status == EAI_SYSTEM)
1238 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1240 gai_strerror (status));
1245 if (ai_list->ai_next != NULL)
1247 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1250 if (obj->srcaddr == NULL)
1252 obj->srcaddrlen = 0;
1253 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1254 if (obj->srcaddr == NULL)
1256 ping_set_errno (obj, errno);
1258 freeaddrinfo (ai_list);
1262 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1263 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1264 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1265 ai_list->ai_addrlen);
1266 obj->srcaddrlen = ai_list->ai_addrlen;
1267 obj->addrfamily = ai_list->ai_family;
1269 freeaddrinfo (ai_list);
1270 } /* case PING_OPT_SOURCE */
1273 case PING_OPT_DEVICE:
1275 #ifdef SO_BINDTODEVICE
1276 char *device = strdup ((char *) value);
1280 ping_set_errno (obj, errno);
1285 if (obj->device != NULL)
1287 obj->device = device;
1288 #else /* ! SO_BINDTODEVICE */
1289 ping_set_errno (obj, ENOTSUP);
1291 #endif /* ! SO_BINDTODEVICE */
1292 } /* case PING_OPT_DEVICE */
1297 } /* switch (option) */
1300 } /* int ping_setopt */
1303 int ping_send (pingobj_t *obj)
1310 if (ping_send_all (obj) < 0)
1313 if ((ret = ping_receive_all (obj)) < 0)
1319 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1323 if (strcasecmp (ph->username, host) == 0)
1332 int ping_host_add (pingobj_t *obj, const char *host)
1336 struct addrinfo ai_hints;
1337 struct addrinfo *ai_list, *ai_ptr;
1340 if ((obj == NULL) || (host == NULL))
1343 dprintf ("host = %s\n", host);
1345 if (ping_host_search (obj->head, host) != NULL)
1348 memset (&ai_hints, '\0', sizeof (ai_hints));
1349 ai_hints.ai_flags = 0;
1350 #ifdef AI_ADDRCONFIG
1351 ai_hints.ai_flags |= AI_ADDRCONFIG;
1354 ai_hints.ai_flags |= AI_CANONNAME;
1356 ai_hints.ai_family = obj->addrfamily;
1357 ai_hints.ai_socktype = SOCK_RAW;
1359 if ((ph = ping_alloc ()) == NULL)
1361 dprintf ("Out of memory!\n");
1365 if ((ph->username = strdup (host)) == NULL)
1367 dprintf ("Out of memory!\n");
1368 ping_set_errno (obj, errno);
1373 if ((ph->hostname = strdup (host)) == NULL)
1375 dprintf ("Out of memory!\n");
1376 ping_set_errno (obj, errno);
1381 /* obj->data is not garuanteed to be != NULL */
1382 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1384 dprintf ("Out of memory!\n");
1385 ping_set_errno (obj, errno);
1390 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1392 #if defined(EAI_SYSTEM)
1393 char errbuf[PING_ERRMSG_LEN];
1395 dprintf ("getaddrinfo failed\n");
1396 ping_set_error (obj, "getaddrinfo",
1397 #if defined(EAI_SYSTEM)
1398 (ai_return == EAI_SYSTEM)
1399 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1401 gai_strerror (ai_return));
1406 if (ai_list == NULL)
1407 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1409 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1413 if (ai_ptr->ai_family == AF_INET)
1415 ai_ptr->ai_socktype = SOCK_RAW;
1416 ai_ptr->ai_protocol = IPPROTO_ICMP;
1418 else if (ai_ptr->ai_family == AF_INET6)
1420 ai_ptr->ai_socktype = SOCK_RAW;
1421 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1425 char errmsg[PING_ERRMSG_LEN];
1427 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1428 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1431 ping_set_error (obj, "getaddrinfo", errmsg);
1435 /* TODO: Move this to a static function `ping_open_socket' and
1436 * call it whenever the socket dies. */
1437 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1441 char errbuf[PING_ERRMSG_LEN];
1442 dprintf ("socket: %s\n",
1443 sstrerror (errno, errbuf, sizeof (errbuf)));
1445 ping_set_errno (obj, errno);
1449 if (obj->srcaddr != NULL)
1451 assert (obj->srcaddrlen > 0);
1452 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1454 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1457 char errbuf[PING_ERRMSG_LEN];
1458 dprintf ("bind: %s\n",
1459 sstrerror (errno, errbuf, sizeof (errbuf)));
1461 ping_set_errno (obj, errno);
1468 #ifdef SO_BINDTODEVICE
1469 if (obj->device != NULL)
1471 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1472 obj->device, strlen (obj->device) + 1) != 0)
1475 char errbuf[PING_ERRMSG_LEN];
1476 dprintf ("setsockopt: %s\n",
1477 sstrerror (errno, errbuf, sizeof (errbuf)));
1479 ping_set_errno (obj, errno);
1485 #endif /* SO_BINDTODEVICE */
1490 setsockopt(ph->fd, SOL_SOCKET, SO_TIMESTAMP, &c, sizeof(c));
1492 #endif /* SO_TIMESTAMP */
1493 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1494 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1495 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1496 ph->addrlen = ai_ptr->ai_addrlen;
1497 ph->addrfamily = ai_ptr->ai_family;
1500 if ((ai_ptr->ai_canonname != NULL)
1501 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1505 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1506 ph->hostname, ai_ptr->ai_canonname);
1508 old_hostname = ph->hostname;
1509 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1511 /* strdup failed, falling back to old hostname */
1512 ph->hostname = old_hostname;
1514 else if (old_hostname != NULL)
1516 free (old_hostname);
1519 #endif /* AI_CANONNAME */
1521 if (ph->addrfamily == AF_INET)
1525 /* Enable receiving the TOS field */
1527 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1528 &opt, sizeof (opt));
1530 /* Enable receiving the TTL field */
1532 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1533 &opt, sizeof (opt));
1535 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1536 else if (ph->addrfamily == AF_INET6)
1540 # if defined(IPV6_RECVHOPLIMIT)
1541 /* For details see RFC 3542, section 6.3. */
1543 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1544 &opt, sizeof (opt));
1545 # endif /* IPV6_RECVHOPLIMIT */
1547 # if defined(IPV6_RECVTCLASS)
1548 /* For details see RFC 3542, section 6.5. */
1550 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1551 &opt, sizeof (opt));
1552 # endif /* IPV6_RECVTCLASS */
1554 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1557 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1559 freeaddrinfo (ai_list);
1568 * Adding in the front is much easier, but then the iterator will
1569 * return the host that was added last as first host. That's just not
1572 if (obj->head == NULL)
1581 while (hptr->next != NULL)
1584 assert ((hptr != NULL) && (hptr->next == NULL));
1588 ping_set_ttl (ph, obj->ttl);
1589 ping_set_qos (obj, ph, obj->qos);
1592 } /* int ping_host_add */
1594 int ping_host_remove (pingobj_t *obj, const char *host)
1596 pinghost_t *pre, *cur;
1598 if ((obj == NULL) || (host == NULL))
1606 if (strcasecmp (host, cur->username) == 0)
1615 ping_set_error (obj, "ping_host_remove", "Host not found");
1620 obj->head = cur->next;
1622 pre->next = cur->next;
1629 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1633 return ((pingobj_iter_t *) obj->head);
1636 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1640 return ((pingobj_iter_t *) iter->next);
1643 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1644 void *buffer, size_t *buffer_len)
1648 size_t orig_buffer_len = *buffer_len;
1650 if ((iter == NULL) || (buffer_len == NULL))
1653 if ((buffer == NULL) && (*buffer_len != 0 ))
1658 case PING_INFO_USERNAME:
1660 *buffer_len = strlen (iter->username) + 1;
1661 if (orig_buffer_len <= *buffer_len)
1663 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1664 * will copy `*buffer_len' and pad the rest of
1665 * `buffer' with null-bytes */
1666 strncpy (buffer, iter->username, orig_buffer_len);
1670 case PING_INFO_HOSTNAME:
1672 *buffer_len = strlen (iter->hostname) + 1;
1673 if (orig_buffer_len < *buffer_len)
1675 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1676 * will copy `*buffer_len' and pad the rest of
1677 * `buffer' with null-bytes */
1678 strncpy (buffer, iter->hostname, orig_buffer_len);
1682 case PING_INFO_ADDRESS:
1683 ret = getnameinfo ((struct sockaddr *) iter->addr,
1691 if ((ret == EAI_MEMORY)
1693 || (ret == EAI_OVERFLOW)
1697 #if defined(EAI_SYSTEM)
1698 else if (ret == EAI_SYSTEM)
1706 case PING_INFO_FAMILY:
1708 *buffer_len = sizeof (int);
1709 if (orig_buffer_len < sizeof (int))
1711 *((int *) buffer) = iter->addrfamily;
1715 case PING_INFO_LATENCY:
1717 *buffer_len = sizeof (double);
1718 if (orig_buffer_len < sizeof (double))
1720 *((double *) buffer) = iter->latency;
1724 case PING_INFO_DROPPED:
1726 *buffer_len = sizeof (uint32_t);
1727 if (orig_buffer_len < sizeof (uint32_t))
1729 *((uint32_t *) buffer) = iter->dropped;
1733 case PING_INFO_SEQUENCE:
1735 *buffer_len = sizeof (unsigned int);
1736 if (orig_buffer_len < sizeof (unsigned int))
1738 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1742 case PING_INFO_IDENT:
1744 *buffer_len = sizeof (uint16_t);
1745 if (orig_buffer_len < sizeof (uint16_t))
1747 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1751 case PING_INFO_DATA:
1753 *buffer_len = strlen (iter->data);
1754 if (orig_buffer_len < *buffer_len)
1756 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1760 case PING_INFO_RECV_TTL:
1762 *buffer_len = sizeof (int);
1763 if (orig_buffer_len < sizeof (int))
1765 *((int *) buffer) = iter->recv_ttl;
1769 case PING_INFO_RECV_QOS:
1771 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1772 if (!*buffer_len) *buffer_len=1;
1773 if (orig_buffer_len < *buffer_len)
1775 memcpy(buffer,&iter->recv_qos,*buffer_len);
1781 } /* ping_iterator_get_info */
1783 void *ping_iterator_get_context (pingobj_iter_t *iter)
1787 return (iter->context);
1790 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1794 iter->context = context;