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
110 /* username: name passed in by the user */
112 /* hostname: name returned by the reverse lookup */
114 struct sockaddr_storage *addr;
120 struct timeval *timer;
129 struct pinghost *next;
140 struct sockaddr *srcaddr;
141 socklen_t srcaddrlen;
148 char errmsg[PING_ERRMSG_LEN];
154 * private (static) functions
156 /* Even though Posix requires "strerror_r" to return an "int",
157 * some systems (e.g. the GNU libc) return a "char *" _and_
158 * ignore the second argument ... -tokkee */
159 static char *sstrerror (int errnum, char *buf, size_t buflen)
165 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
167 /* #endif !HAVE_STRERROR_R */
169 #elif STRERROR_R_CHAR_P
172 temp = strerror_r (errnum, buf, buflen);
175 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
176 strncpy (buf, temp, buflen);
178 strncpy (buf, "strerror_r did not return "
179 "an error message", buflen);
182 /* #endif STRERROR_R_CHAR_P */
185 if (strerror_r (errnum, buf, buflen) != 0)
187 snprintf (buf, buflen, "Error %i (%#x); "
188 "Additionally, strerror_r failed.",
191 #endif /* STRERROR_R_CHAR_P */
196 } /* char *sstrerror */
198 static void ping_set_error (pingobj_t *obj, const char *function,
201 snprintf (obj->errmsg, sizeof (obj->errmsg),
202 "%s: %s", function, message);
203 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
206 static void ping_set_errno (pingobj_t *obj, int error_number)
208 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
211 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
214 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
215 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
217 while (res->tv_usec > 1000000)
219 res->tv_usec -= 1000000;
226 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
229 if ((tv1->tv_sec < tv2->tv_sec)
230 || ((tv1->tv_sec == tv2->tv_sec)
231 && (tv1->tv_usec < tv2->tv_usec)))
234 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
235 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
237 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
239 while (res->tv_usec < 0)
241 res->tv_usec += 1000000;
248 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
255 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
260 *(char *) &ret = *(char *) ptr;
264 /* Do this twice to get all possible carries.. */
265 sum = (sum >> 16) + (sum & 0xFFFF);
266 sum = (sum >> 16) + (sum & 0xFFFF);
273 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
277 struct icmp *icmp_hdr;
281 uint16_t recv_checksum;
282 uint16_t calc_checksum;
289 if (buffer_len < sizeof (struct ip))
292 ip_hdr = (struct ip *) buffer;
293 ip_hdr_len = ip_hdr->ip_hl << 2;
295 if (buffer_len < ip_hdr_len)
298 buffer += ip_hdr_len;
299 buffer_len -= ip_hdr_len;
301 if (buffer_len < ICMP_MINLEN)
304 icmp_hdr = (struct icmp *) buffer;
305 buffer += ICMP_MINLEN;
306 buffer_len -= ICMP_MINLEN;
308 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
310 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
314 recv_checksum = icmp_hdr->icmp_cksum;
315 icmp_hdr->icmp_cksum = 0;
316 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
317 ICMP_MINLEN + buffer_len);
319 if (recv_checksum != calc_checksum)
321 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
322 "calculated 0x%04"PRIx16"\n",
323 recv_checksum, calc_checksum);
327 ident = ntohs (icmp_hdr->icmp_id);
328 seq = ntohs (icmp_hdr->icmp_seq);
330 /* We have to iterate over all hosts, since ICMPv4 packets may
331 * be received on any raw v4 socket. */
332 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
334 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
335 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
337 if (ptr->addrfamily != AF_INET)
340 if (!timerisset (ptr->timer))
343 if (ptr->ident != ident)
346 if (((ptr->sequence - 1) & 0xFFFF) != seq)
349 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
351 ptr->hostname, ident, seq);
358 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
363 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
364 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
369 #ifndef ICMP6_ECHO_REQUEST
370 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
371 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
373 # define ICMP6_ECHO_REQUEST 128
377 #ifndef ICMP6_ECHO_REPLY
378 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
379 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
381 # define ICMP6_ECHO_REPLY 129
385 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
388 struct icmp6_hdr *icmp_hdr;
395 if (buffer_len < ICMP_MINLEN)
398 icmp_hdr = (struct icmp6_hdr *) buffer;
399 buffer += ICMP_MINLEN;
400 buffer_len -= ICMP_MINLEN;
402 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
404 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
408 if (icmp_hdr->icmp6_code != 0)
410 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
414 ident = ntohs (icmp_hdr->icmp6_id);
415 seq = ntohs (icmp_hdr->icmp6_seq);
417 /* We have to iterate over all hosts, since ICMPv6 packets may
418 * be received on any raw v6 socket. */
419 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
421 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
422 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
424 if (ptr->addrfamily != AF_INET6)
427 if (!timerisset (ptr->timer))
430 if (ptr->ident != ident)
433 if (((ptr->sequence - 1) & 0xFFFF) != seq)
436 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
438 ptr->hostname, ident, seq);
445 dprintf ("No match found for ident = 0x%04"PRIx16", "
453 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
456 /* Note: 'ph' is not necessarily the host object for which we receive a
457 * reply. The right object will be returned by ping_receive_ipv*(). For
458 * now, we can only rely on ph->fd and ph->addrfamily. */
460 struct timeval diff, pkt_now = *now;
461 pinghost_t *host = NULL;
466 * Set up the receive buffer..
468 struct msghdr msghdr;
469 struct cmsghdr *cmsg;
470 char payload_buffer[4096];
471 ssize_t payload_buffer_len;
472 char control_buffer[4096];
473 struct iovec payload_iovec;
475 memset (&payload_iovec, 0, sizeof (payload_iovec));
476 payload_iovec.iov_base = payload_buffer;
477 payload_iovec.iov_len = sizeof (payload_buffer);
479 memset (&msghdr, 0, sizeof (msghdr));
480 /* unspecified source address */
481 msghdr.msg_name = NULL;
482 msghdr.msg_namelen = 0;
483 /* output buffer vector, see readv(2) */
484 msghdr.msg_iov = &payload_iovec;
485 msghdr.msg_iovlen = 1;
486 /* output buffer for control messages */
487 msghdr.msg_control = control_buffer;
488 msghdr.msg_controllen = sizeof (control_buffer);
489 /* flags; this is an output only field.. */
490 msghdr.msg_flags = 0;
492 msghdr.msg_flags |= MSG_XPG4_2;
495 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
496 if (payload_buffer_len < 0)
499 char errbuf[PING_ERRMSG_LEN];
500 dprintf ("recvfrom: %s\n",
501 sstrerror (errno, errbuf, sizeof (errbuf)));
505 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
507 /* Iterate over all auxiliary data in msghdr */
510 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
512 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
514 if (cmsg->cmsg_level == SOL_SOCKET)
517 if (cmsg->cmsg_type == SO_TIMESTAMP)
518 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
519 #endif /* SO_TIMESTAMP */
521 else if (ph->addrfamily == AF_INET) /* {{{ */
523 if (cmsg->cmsg_level != IPPROTO_IP)
526 if (cmsg->cmsg_type == IP_TOS)
528 memcpy (&recv_qos, CMSG_DATA (cmsg),
530 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
532 if (cmsg->cmsg_type == IP_TTL)
534 memcpy (&recv_ttl, CMSG_DATA (cmsg),
536 dprintf ("TTLv4 = %i;\n", recv_ttl);
540 dprintf ("Not handling option %i.\n",
544 else if (ph->addrfamily == AF_INET6) /* {{{ */
546 if (cmsg->cmsg_level != IPPROTO_IPV6)
549 if (cmsg->cmsg_type == IPV6_TCLASS)
551 memcpy (&recv_qos, CMSG_DATA (cmsg),
553 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
556 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
558 memcpy (&recv_ttl, CMSG_DATA (cmsg),
560 dprintf ("TTLv6 = %i;\n", recv_ttl);
564 #ifdef IPV6_UNICAST_HOPS
565 if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
567 memcpy (&recv_ttl, CMSG_DATA (cmsg),
569 dprintf ("TTLv6 = %i;\n", recv_ttl);
573 #ifdef IPV6_MULTICAST_HOPS
574 if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
576 memcpy (&recv_ttl, CMSG_DATA (cmsg),
578 dprintf ("TTLv6 = %i;\n", recv_ttl);
583 dprintf ("Not handling option %i.\n",
589 dprintf ("Don't know how to handle "
590 "unknown protocol %i.\n",
593 } /* }}} for (cmsg) */
595 if (ph->addrfamily == AF_INET)
597 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
601 else if (ph->addrfamily == AF_INET6)
603 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
609 dprintf ("ping_receive_one: Unknown address family %i.\n",
614 dprintf ("rcvd: %12i.%06i\n",
615 (int) pkt_now.tv_sec,
616 (int) pkt_now.tv_usec);
617 dprintf ("sent: %12i.%06i\n",
618 (int) host->timer->tv_sec,
619 (int) host->timer->tv_usec);
621 if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
623 timerclear (host->timer);
627 dprintf ("diff: %12i.%06i\n",
632 host->recv_ttl = recv_ttl;
633 host->recv_qos = recv_qos;
635 host->latency = ((double) diff.tv_usec) / 1000.0;
636 host->latency += ((double) diff.tv_sec) * 1000.0;
638 timerclear (host->timer);
643 /* Blocks until a packet was received from all hosts or the timeout is reached.
644 * When interrupted, (-EINTR) is returned. On error, -1 is returned. On
645 * success, returns zero. */
646 static int ping_receive_all (pingobj_t *obj)
656 struct timeval endtime;
657 struct timeval nowtime;
658 struct timeval timeout;
666 for (ptr = ph; ptr != NULL; ptr = ptr->next)
672 if (gettimeofday (&nowtime, NULL) == -1)
674 ping_set_errno (obj, errno);
679 timeout.tv_sec = (time_t) obj->timeout;
680 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
682 dprintf ("Set timeout to %i.%06i seconds\n",
683 (int) timeout.tv_sec,
684 (int) timeout.tv_usec);
686 ping_timeval_add (&nowtime, &timeout, &endtime);
695 for (ptr = ph; ptr != NULL; ptr = ptr->next)
697 if (!timerisset (ptr->timer))
700 FD_SET (ptr->fd, &read_fds);
701 FD_SET (ptr->fd, &err_fds);
704 if (max_fd < ptr->fd)
711 if (gettimeofday (&nowtime, NULL) == -1)
713 ping_set_errno (obj, errno);
717 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
720 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
721 (int) timeout.tv_sec,
722 (int) timeout.tv_usec);
724 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
726 if (gettimeofday (&nowtime, NULL) == -1)
728 ping_set_errno (obj, errno);
732 if ((status == -1) && (errno == EINTR))
734 dprintf ("select was interrupted by signal..\n");
735 ping_set_errno (obj, EINTR);
741 char errbuf[PING_ERRMSG_LEN];
742 dprintf ("select: %s\n",
743 sstrerror (errno, errbuf, sizeof (errbuf)));
747 else if (status == 0)
749 dprintf ("select timed out\n");
750 for (ptr = ph; ptr != NULL; ptr = ptr->next)
751 if (ptr->latency < 0.0)
756 for (ptr = ph; ptr != NULL; ptr = ptr->next)
758 if (FD_ISSET (ptr->fd, &read_fds))
760 if (ping_receive_one (obj, ptr, &nowtime) == 0)
763 else if (FD_ISSET (ptr->fd, &err_fds))
765 /* clear the timer in this case so that we
766 * don't run into an endless loop. */
767 /* TODO: Set an error flag in this case. */
768 timerclear (ptr->timer);
774 } /* int ping_receive_all */
776 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
777 * Sending functions: *
780 * +-> ping_send_one_ipv4 *
781 * `-> ping_send_one_ipv6 *
782 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
783 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
784 const void *buf, size_t buflen)
788 if (gettimeofday (ph->timer, NULL) == -1)
790 timerclear (ph->timer);
794 ret = sendto (ph->fd, buf, buflen, 0,
795 (struct sockaddr *) ph->addr, ph->addrlen);
799 #if defined(EHOSTUNREACH)
800 if (errno == EHOSTUNREACH)
803 #if defined(ENETUNREACH)
804 if (errno == ENETUNREACH)
807 ping_set_errno (obj, errno);
813 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
824 dprintf ("ph->hostname = %s\n", ph->hostname);
826 memset (buf, '\0', sizeof (buf));
827 icmp4 = (struct icmp *) buf;
828 data = buf + ICMP_MINLEN;
830 icmp4->icmp_type = ICMP_ECHO;
831 icmp4->icmp_code = 0;
832 icmp4->icmp_cksum = 0;
833 icmp4->icmp_id = htons (ph->ident);
834 icmp4->icmp_seq = htons (ph->sequence);
836 buflen = sizeof(buf) - ICMP_MINLEN;
837 strncpy (data, ph->data, buflen);
838 datalen = strlen (data);
840 buflen = datalen + ICMP_MINLEN;
842 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
844 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
846 status = ping_sendto (obj, ph, buf, buflen);
849 perror ("ping_sendto");
853 dprintf ("sendto: status = %i\n", status);
858 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
860 struct icmp6_hdr *icmp6;
869 dprintf ("ph->hostname = %s\n", ph->hostname);
871 memset (buf, '\0', sizeof (buf));
872 icmp6 = (struct icmp6_hdr *) buf;
873 data = (char *) (icmp6 + 1);
875 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
876 icmp6->icmp6_code = 0;
877 /* The checksum will be calculated by the TCP/IP stack. */
879 icmp6->icmp6_cksum = 0;
880 icmp6->icmp6_id = htons (ph->ident);
881 icmp6->icmp6_seq = htons (ph->sequence);
883 buflen = 4096 - ICMP_MINLEN;
884 strncpy (data, ph->data, buflen);
885 datalen = strlen (data);
887 buflen = datalen + ICMP_MINLEN;
889 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
891 status = ping_sendto (obj, ph, buf, buflen);
894 perror ("ping_sendto");
898 dprintf ("sendto: status = %i\n", status);
903 static int ping_send_all (pingobj_t *obj)
913 for (ptr = ph; ptr != NULL; ptr = ptr->next)
915 /* start timer.. The GNU `ping6' starts the timer before
916 * sending the packet, so I will do that too */
917 if (gettimeofday (ptr->timer, NULL) == -1)
920 char errbuf[PING_ERRMSG_LEN];
921 dprintf ("gettimeofday: %s\n",
922 sstrerror (errno, errbuf, sizeof (errbuf)));
924 timerclear (ptr->timer);
930 dprintf ("timer set for hostname = %s\n", ptr->hostname);
933 if (ptr->addrfamily == AF_INET6)
935 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
936 if (ping_send_one_ipv6 (obj, ptr) != 0)
938 timerclear (ptr->timer);
943 else if (ptr->addrfamily == AF_INET)
945 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
946 if (ping_send_one_ipv4 (obj, ptr) != 0)
948 timerclear (ptr->timer);
953 else /* this should not happen */
955 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
956 timerclear (ptr->timer);
968 * Set the TTL of a socket protocol independently.
970 static int ping_set_ttl (pinghost_t *ph, int ttl)
974 if (ph->addrfamily == AF_INET)
976 dprintf ("Setting TTLv4 to %i\n", ttl);
977 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
980 else if (ph->addrfamily == AF_INET6)
982 dprintf ("Setting TTLv6 to %i\n", ttl);
983 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
991 * Set the TOS of a socket protocol independently.
993 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
994 * set this. See socket(7) for details.
996 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
999 char errbuf[PING_ERRMSG_LEN];
1001 if (ph->addrfamily == AF_INET)
1003 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
1004 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1005 &qos, sizeof (qos));
1009 ping_set_error (obj, "ping_set_qos",
1010 sstrerror (ret, errbuf, sizeof (errbuf)));
1011 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1014 else if (ph->addrfamily == AF_INET6)
1016 /* IPV6_TCLASS requires an "int". */
1017 int tmp = (int) qos;
1019 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1020 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1021 &tmp, sizeof (tmp));
1025 ping_set_error (obj, "ping_set_qos",
1026 sstrerror (ret, errbuf, sizeof (errbuf)));
1027 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1034 static int ping_get_ident (void)
1037 static int did_seed = 0;
1043 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1047 if (read (fd, &seed, sizeof (seed)) != -1)
1050 dprintf ("Random seed: %#x\n", seed);
1059 char errbuf[PING_ERRMSG_LEN];
1060 dprintf ("open (/dev/urandom): %s\n",
1061 sstrerror (errno, errbuf, sizeof (errbuf)));
1066 retval = (int) random ();
1068 dprintf ("Random number: %#x\n", retval);
1073 static pinghost_t *ping_alloc (void)
1078 ph_size = sizeof (pinghost_t)
1079 + sizeof (struct sockaddr_storage)
1080 + sizeof (struct timeval);
1082 ph = (pinghost_t *) malloc (ph_size);
1086 memset (ph, '\0', ph_size);
1088 ph->timer = (struct timeval *) (ph + 1);
1089 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1091 ph->addrlen = sizeof (struct sockaddr_storage);
1095 ph->ident = ping_get_ident () & 0xFFFF;
1100 static void ping_free (pinghost_t *ph)
1105 if (ph->username != NULL)
1106 free (ph->username);
1108 if (ph->hostname != NULL)
1109 free (ph->hostname);
1111 if (ph->data != NULL)
1120 const char *ping_get_error (pingobj_t *obj)
1124 return (obj->errmsg);
1127 pingobj_t *ping_construct (void)
1131 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1133 memset (obj, 0, sizeof (pingobj_t));
1135 obj->timeout = PING_DEF_TIMEOUT;
1136 obj->ttl = PING_DEF_TTL;
1137 obj->addrfamily = PING_DEF_AF;
1138 obj->data = strdup (PING_DEF_DATA);
1144 void ping_destroy (pingobj_t *obj)
1146 pinghost_t *current;
1152 current = obj->head;
1155 while (current != NULL)
1157 next = current->next;
1158 ping_free (current);
1162 if (obj->data != NULL)
1165 if (obj->srcaddr != NULL)
1166 free (obj->srcaddr);
1168 if (obj->device != NULL)
1176 int ping_setopt (pingobj_t *obj, int option, void *value)
1180 if ((obj == NULL) || (value == NULL))
1189 obj->qos = *((uint8_t *) value);
1190 for (ph = obj->head; ph != NULL; ph = ph->next)
1191 ping_set_qos (obj, ph, obj->qos);
1195 case PING_OPT_TIMEOUT:
1196 obj->timeout = *((double *) value);
1197 if (obj->timeout < 0.0)
1199 obj->timeout = PING_DEF_TIMEOUT;
1205 obj->ttl = *((int *) value);
1206 if ((obj->ttl < 1) || (obj->ttl > 255))
1208 obj->ttl = PING_DEF_TTL;
1215 for (ph = obj->head; ph != NULL; ph = ph->next)
1216 ping_set_ttl (ph, obj->ttl);
1221 obj->addrfamily = *((int *) value);
1222 if ((obj->addrfamily != AF_UNSPEC)
1223 && (obj->addrfamily != AF_INET)
1224 && (obj->addrfamily != AF_INET6))
1226 obj->addrfamily = PING_DEF_AF;
1229 if (obj->srcaddr != NULL)
1231 free (obj->srcaddr);
1232 obj->srcaddr = NULL;
1237 if (obj->data != NULL)
1242 obj->data = strdup ((const char *) value);
1245 case PING_OPT_SOURCE:
1247 char *hostname = (char *) value;
1248 struct addrinfo ai_hints;
1249 struct addrinfo *ai_list;
1252 if (obj->addrfamily != AF_UNSPEC)
1254 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1257 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1258 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1259 #if defined(AI_ADDRCONFIG)
1260 ai_hints.ai_flags = AI_ADDRCONFIG;
1262 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1265 #if defined(EAI_SYSTEM)
1266 char errbuf[PING_ERRMSG_LEN];
1268 ping_set_error (obj, "getaddrinfo",
1269 #if defined(EAI_SYSTEM)
1270 (status == EAI_SYSTEM)
1271 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1273 gai_strerror (status));
1278 if (ai_list->ai_next != NULL)
1280 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1283 if (obj->srcaddr == NULL)
1285 obj->srcaddrlen = 0;
1286 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1287 if (obj->srcaddr == NULL)
1289 ping_set_errno (obj, errno);
1291 freeaddrinfo (ai_list);
1295 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1296 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1297 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1298 ai_list->ai_addrlen);
1299 obj->srcaddrlen = ai_list->ai_addrlen;
1300 obj->addrfamily = ai_list->ai_family;
1302 freeaddrinfo (ai_list);
1303 } /* case PING_OPT_SOURCE */
1306 case PING_OPT_DEVICE:
1308 #ifdef SO_BINDTODEVICE
1309 char *device = strdup ((char *) value);
1313 ping_set_errno (obj, errno);
1318 if (obj->device != NULL)
1320 obj->device = device;
1321 #else /* ! SO_BINDTODEVICE */
1322 ping_set_errno (obj, ENOTSUP);
1324 #endif /* ! SO_BINDTODEVICE */
1325 } /* case PING_OPT_DEVICE */
1331 obj->mark = *(int*)(value);
1334 ping_set_errno (obj, ENOTSUP);
1336 #endif /* !SO_MARK */
1338 } /* case PING_OPT_MARK */
1343 } /* switch (option) */
1346 } /* int ping_setopt */
1349 int ping_send (pingobj_t *obj)
1354 if (ping_send_all (obj) < 0)
1357 return (ping_receive_all (obj));
1360 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1364 if (strcasecmp (ph->username, host) == 0)
1373 int ping_host_add (pingobj_t *obj, const char *host)
1377 struct addrinfo ai_hints;
1378 struct addrinfo *ai_list, *ai_ptr;
1381 if ((obj == NULL) || (host == NULL))
1384 dprintf ("host = %s\n", host);
1386 if (ping_host_search (obj->head, host) != NULL)
1389 memset (&ai_hints, '\0', sizeof (ai_hints));
1390 ai_hints.ai_flags = 0;
1391 #ifdef AI_ADDRCONFIG
1392 ai_hints.ai_flags |= AI_ADDRCONFIG;
1395 ai_hints.ai_flags |= AI_CANONNAME;
1397 ai_hints.ai_family = obj->addrfamily;
1398 ai_hints.ai_socktype = SOCK_RAW;
1400 if ((ph = ping_alloc ()) == NULL)
1402 dprintf ("Out of memory!\n");
1406 if ((ph->username = strdup (host)) == NULL)
1408 dprintf ("Out of memory!\n");
1409 ping_set_errno (obj, errno);
1414 if ((ph->hostname = strdup (host)) == NULL)
1416 dprintf ("Out of memory!\n");
1417 ping_set_errno (obj, errno);
1422 /* obj->data is not garuanteed to be != NULL */
1423 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1425 dprintf ("Out of memory!\n");
1426 ping_set_errno (obj, errno);
1431 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1433 #if defined(EAI_SYSTEM)
1434 char errbuf[PING_ERRMSG_LEN];
1436 dprintf ("getaddrinfo failed\n");
1437 ping_set_error (obj, "getaddrinfo",
1438 #if defined(EAI_SYSTEM)
1439 (ai_return == EAI_SYSTEM)
1440 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1442 gai_strerror (ai_return));
1447 if (ai_list == NULL)
1448 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1450 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1454 if (ai_ptr->ai_family == AF_INET)
1456 ai_ptr->ai_socktype = SOCK_RAW;
1457 ai_ptr->ai_protocol = IPPROTO_ICMP;
1459 else if (ai_ptr->ai_family == AF_INET6)
1461 ai_ptr->ai_socktype = SOCK_RAW;
1462 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1466 char errmsg[PING_ERRMSG_LEN];
1468 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1469 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1471 dprintf ("%s", errmsg);
1472 ping_set_error (obj, "getaddrinfo", errmsg);
1476 /* TODO: Move this to a static function `ping_open_socket' and
1477 * call it whenever the socket dies. */
1478 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1482 char errbuf[PING_ERRMSG_LEN];
1483 dprintf ("socket: %s\n",
1484 sstrerror (errno, errbuf, sizeof (errbuf)));
1486 ping_set_errno (obj, errno);
1490 if (obj->srcaddr != NULL)
1492 assert (obj->srcaddrlen > 0);
1493 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1495 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1498 char errbuf[PING_ERRMSG_LEN];
1499 dprintf ("bind: %s\n",
1500 sstrerror (errno, errbuf, sizeof (errbuf)));
1502 ping_set_errno (obj, errno);
1509 #ifdef SO_BINDTODEVICE
1510 if (obj->device != NULL)
1512 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1513 obj->device, strlen (obj->device) + 1) != 0)
1516 char errbuf[PING_ERRMSG_LEN];
1517 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1518 sstrerror (errno, errbuf, sizeof (errbuf)));
1520 ping_set_errno (obj, errno);
1526 #endif /* SO_BINDTODEVICE */
1530 if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
1533 char errbuf[PING_ERRMSG_LEN];
1534 dprintf ("setsockopt (SO_MARK): %s\n",
1535 sstrerror (errno, errbuf, sizeof (errbuf)));
1537 ping_set_errno (obj, errno);
1550 status = setsockopt (ph->fd,
1551 SOL_SOCKET, SO_TIMESTAMP,
1552 &opt, sizeof (opt));
1556 char errbuf[PING_ERRMSG_LEN];
1557 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1558 sstrerror (errno, errbuf, sizeof (errbuf)));
1560 ping_set_errno (obj, errno);
1566 #endif /* SO_TIMESTAMP */
1567 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1568 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1569 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1570 ph->addrlen = ai_ptr->ai_addrlen;
1571 ph->addrfamily = ai_ptr->ai_family;
1574 if ((ai_ptr->ai_canonname != NULL)
1575 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1579 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1580 ph->hostname, ai_ptr->ai_canonname);
1582 old_hostname = ph->hostname;
1583 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1585 /* strdup failed, falling back to old hostname */
1586 ph->hostname = old_hostname;
1588 else if (old_hostname != NULL)
1590 free (old_hostname);
1593 #endif /* AI_CANONNAME */
1595 if (ph->addrfamily == AF_INET)
1600 /* Enable receiving the TOS field */
1602 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1603 &opt, sizeof (opt));
1604 #endif /* IP_RECVTOS */
1606 /* Enable receiving the TTL field */
1608 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1609 &opt, sizeof (opt));
1611 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1612 else if (ph->addrfamily == AF_INET6)
1616 # if defined(IPV6_RECVHOPLIMIT)
1617 /* For details see RFC 3542, section 6.3. */
1619 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1620 &opt, sizeof (opt));
1621 # endif /* IPV6_RECVHOPLIMIT */
1623 # if defined(IPV6_RECVTCLASS)
1624 /* For details see RFC 3542, section 6.5. */
1626 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1627 &opt, sizeof (opt));
1628 # endif /* IPV6_RECVTCLASS */
1630 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1633 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1635 freeaddrinfo (ai_list);
1644 * Adding in the front is much easier, but then the iterator will
1645 * return the host that was added last as first host. That's just not
1648 if (obj->head == NULL)
1657 while (hptr->next != NULL)
1660 assert ((hptr != NULL) && (hptr->next == NULL));
1664 ping_set_ttl (ph, obj->ttl);
1665 ping_set_qos (obj, ph, obj->qos);
1668 } /* int ping_host_add */
1670 int ping_host_remove (pingobj_t *obj, const char *host)
1672 pinghost_t *pre, *cur;
1674 if ((obj == NULL) || (host == NULL))
1682 if (strcasecmp (host, cur->username) == 0)
1691 ping_set_error (obj, "ping_host_remove", "Host not found");
1696 obj->head = cur->next;
1698 pre->next = cur->next;
1705 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1709 return ((pingobj_iter_t *) obj->head);
1712 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1716 return ((pingobj_iter_t *) iter->next);
1719 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1720 void *buffer, size_t *buffer_len)
1724 size_t orig_buffer_len = *buffer_len;
1726 if ((iter == NULL) || (buffer_len == NULL))
1729 if ((buffer == NULL) && (*buffer_len != 0 ))
1734 case PING_INFO_USERNAME:
1736 *buffer_len = strlen (iter->username) + 1;
1737 if (orig_buffer_len <= *buffer_len)
1739 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1740 * will copy `*buffer_len' and pad the rest of
1741 * `buffer' with null-bytes */
1742 strncpy (buffer, iter->username, orig_buffer_len);
1746 case PING_INFO_HOSTNAME:
1748 *buffer_len = strlen (iter->hostname) + 1;
1749 if (orig_buffer_len < *buffer_len)
1751 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1752 * will copy `*buffer_len' and pad the rest of
1753 * `buffer' with null-bytes */
1754 strncpy (buffer, iter->hostname, orig_buffer_len);
1758 case PING_INFO_ADDRESS:
1759 ret = getnameinfo ((struct sockaddr *) iter->addr,
1767 if ((ret == EAI_MEMORY)
1769 || (ret == EAI_OVERFLOW)
1773 #if defined(EAI_SYSTEM)
1774 else if (ret == EAI_SYSTEM)
1782 case PING_INFO_FAMILY:
1784 *buffer_len = sizeof (int);
1785 if (orig_buffer_len < sizeof (int))
1787 *((int *) buffer) = iter->addrfamily;
1791 case PING_INFO_LATENCY:
1793 *buffer_len = sizeof (double);
1794 if (orig_buffer_len < sizeof (double))
1796 *((double *) buffer) = iter->latency;
1800 case PING_INFO_DROPPED:
1802 *buffer_len = sizeof (uint32_t);
1803 if (orig_buffer_len < sizeof (uint32_t))
1805 *((uint32_t *) buffer) = iter->dropped;
1809 case PING_INFO_SEQUENCE:
1811 *buffer_len = sizeof (unsigned int);
1812 if (orig_buffer_len < sizeof (unsigned int))
1814 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1818 case PING_INFO_IDENT:
1820 *buffer_len = sizeof (uint16_t);
1821 if (orig_buffer_len < sizeof (uint16_t))
1823 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1827 case PING_INFO_DATA:
1829 *buffer_len = strlen (iter->data);
1830 if (orig_buffer_len < *buffer_len)
1832 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1836 case PING_INFO_RECV_TTL:
1838 *buffer_len = sizeof (int);
1839 if (orig_buffer_len < sizeof (int))
1841 *((int *) buffer) = iter->recv_ttl;
1845 case PING_INFO_RECV_QOS:
1847 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1848 if (!*buffer_len) *buffer_len=1;
1849 if (orig_buffer_len < *buffer_len)
1851 memcpy(buffer,&iter->recv_qos,*buffer_len);
1857 } /* ping_iterator_get_info */
1859 void *ping_iterator_get_context (pingobj_iter_t *iter)
1863 return (iter->context);
1866 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1870 iter->context = context;