2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2008 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
31 # error "You don't have the standard C99 header files installed"
32 #endif /* STDC_HEADERS */
42 # include <sys/types.h>
45 # include <sys/stat.h>
48 #if TIME_WITH_SYS_TIME
49 # include <sys/time.h>
53 # include <sys/time.h>
60 # include <sys/socket.h>
66 #if HAVE_NETINET_IN_SYSTM_H
67 # include <netinet/in_systm.h>
70 # include <netinet/in.h>
73 # include <netinet/ip.h>
75 #if HAVE_NETINET_IP_ICMP_H
76 # include <netinet/ip_icmp.h>
78 #ifdef HAVE_NETINET_IP_VAR_H
79 # include <netinet/ip_var.h>
81 #if HAVE_NETINET_IP6_H
82 # include <netinet/ip6.h>
84 #if HAVE_NETINET_ICMP6_H
85 # include <netinet/icmp6.h>
91 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
93 # define dprintf(...) /**/
96 #define PING_ERRMSG_LEN 256
100 /* username: name passed in by the user */
102 /* hostname: name returned by the reverse lookup */
104 struct sockaddr_storage *addr;
110 struct timeval *timer;
116 struct pinghost *next;
126 struct sockaddr_storage *srcaddr;
127 socklen_t srcaddrlen;
129 char errmsg[PING_ERRMSG_LEN];
135 * private (static) functions
137 static void ping_set_error (pingobj_t *obj, const char *function,
140 snprintf (obj->errmsg, PING_ERRMSG_LEN, "%s: %s", function, message);
141 obj->errmsg[PING_ERRMSG_LEN - 1] = '\0';
144 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
147 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
148 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
150 while (res->tv_usec > 1000000)
152 res->tv_usec -= 1000000;
159 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
163 if ((tv1->tv_sec < tv2->tv_sec)
164 || ((tv1->tv_sec == tv2->tv_sec)
165 && (tv1->tv_usec < tv2->tv_usec)))
168 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
169 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
171 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec > 0)));
173 while (res->tv_usec < 0)
175 res->tv_usec += 1000000;
182 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
189 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
194 *(char *) &ret = *(char *) ptr;
198 /* Do this twice to get all possible carries.. */
199 sum = (sum >> 16) + (sum & 0xFFFF);
200 sum = (sum >> 16) + (sum & 0xFFFF);
207 static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len)
210 struct icmp *icmp_hdr;
214 uint16_t recv_checksum;
215 uint16_t calc_checksum;
222 if (buffer_len < sizeof (struct ip))
225 ip_hdr = (struct ip *) buffer;
226 ip_hdr_len = ip_hdr->ip_hl << 2;
228 if (buffer_len < ip_hdr_len)
231 buffer += ip_hdr_len;
232 buffer_len -= ip_hdr_len;
234 if (buffer_len < sizeof (struct icmp))
237 icmp_hdr = (struct icmp *) buffer;
238 buffer += sizeof (struct icmp);
239 buffer_len -= sizeof (struct icmp);
241 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
243 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
247 recv_checksum = icmp_hdr->icmp_cksum;
248 icmp_hdr->icmp_cksum = 0;
249 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
250 sizeof (struct icmp) + buffer_len);
252 if (recv_checksum != calc_checksum)
254 dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n",
255 recv_checksum, calc_checksum);
259 ident = ntohs (icmp_hdr->icmp_id);
260 seq = ntohs (icmp_hdr->icmp_seq);
262 for (ptr = ph; ptr != NULL; ptr = ptr->next)
264 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
265 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
267 if (ptr->addrfamily != AF_INET)
270 if (!timerisset (ptr->timer))
273 if (ptr->ident != ident)
276 if (((ptr->sequence - 1) & 0xFFFF) != seq)
279 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
280 ptr->hostname, ident, seq);
287 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
294 static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len)
296 struct icmp6_hdr *icmp_hdr;
303 if (buffer_len < sizeof (struct icmp6_hdr))
306 icmp_hdr = (struct icmp6_hdr *) buffer;
307 buffer += sizeof (struct icmp);
308 buffer_len -= sizeof (struct icmp);
310 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
312 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
316 if (icmp_hdr->icmp6_code != 0)
318 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
322 ident = ntohs (icmp_hdr->icmp6_id);
323 seq = ntohs (icmp_hdr->icmp6_seq);
325 for (ptr = ph; 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_INET6)
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%04x, seq = %i\n",
343 ptr->hostname, ident, seq);
350 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
357 static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now)
364 pinghost_t *host = NULL;
366 struct sockaddr_storage sa;
369 sa_len = sizeof (sa);
371 buffer_len = recvfrom (fd, buffer, sizeof (buffer), 0,
372 (struct sockaddr *) &sa, &sa_len);
373 if (buffer_len == -1)
375 dprintf ("recvfrom: %s\n", strerror (errno));
379 dprintf ("Read %u bytes from fd = %i\n", (unsigned int) buffer_len, fd);
381 if (sa.ss_family == AF_INET)
383 if ((host = ping_receive_ipv4 (ph, buffer, buffer_len)) == NULL)
386 else if (sa.ss_family == AF_INET6)
388 if ((host = ping_receive_ipv6 (ph, buffer, buffer_len)) == NULL)
392 dprintf ("rcvd: %12i.%06i\n",
395 dprintf ("sent: %12i.%06i\n",
396 (int) host->timer->tv_sec,
397 (int) host->timer->tv_usec);
399 if (ping_timeval_sub (now, host->timer, &diff) < 0)
401 timerclear (host->timer);
405 dprintf ("diff: %12i.%06i\n",
409 host->latency = ((double) diff.tv_usec) / 1000.0;
410 host->latency += ((double) diff.tv_sec) * 1000.0;
412 timerclear (host->timer);
417 static int ping_receive_all (pingobj_t *obj)
426 struct timeval endtime;
427 struct timeval nowtime;
428 struct timeval timeout;
436 for (ptr = ph; ptr != NULL; ptr = ptr->next)
439 if (gettimeofday (&nowtime, NULL) == -1)
441 ping_set_error (obj, "gettimeofday", strerror (errno));
446 timeout.tv_sec = (time_t) obj->timeout;
447 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
449 dprintf ("Set timeout to %i.%06i seconds\n",
450 (int) timeout.tv_sec,
451 (int) timeout.tv_usec);
453 ping_timeval_add (&nowtime, &timeout, &endtime);
461 for (ptr = ph; ptr != NULL; ptr = ptr->next)
463 if (!timerisset (ptr->timer))
466 FD_SET (ptr->fd, &readfds);
469 if (max_readfds < ptr->fd)
470 max_readfds = ptr->fd;
473 if (num_readfds == 0)
476 if (gettimeofday (&nowtime, NULL) == -1)
478 ping_set_error (obj, "gettimeofday", strerror (errno));
482 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
485 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
486 (int) timeout.tv_sec,
487 (int) timeout.tv_usec);
489 status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
491 if (gettimeofday (&nowtime, NULL) == -1)
493 ping_set_error (obj, "gettimeofday", strerror (errno));
497 if ((status == -1) && (errno == EINTR))
499 dprintf ("select was interrupted by signal..\n");
504 dprintf ("select: %s\n", strerror (errno));
507 else if (status == 0)
509 dprintf ("select timed out\n");
513 for (ptr = ph; ptr != NULL; ptr = ptr->next)
515 if (FD_ISSET (ptr->fd, &readfds))
516 if (ping_receive_one (ptr->fd, ph, &nowtime) == 0)
524 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
525 * Sending functions: *
528 * +-> ping_send_one_ipv4 *
529 * `-> ping_send_one_ipv6 *
530 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
531 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
532 const void *buf, size_t buflen)
536 if (gettimeofday (ph->timer, NULL) == -1)
538 timerclear (ph->timer);
542 ret = sendto (ph->fd, buf, buflen, 0,
543 (struct sockaddr *) ph->addr, ph->addrlen);
547 #if defined(EHOSTUNREACH)
548 if (errno == EHOSTUNREACH)
551 #if defined(ENETUNREACH)
552 if (errno == ENETUNREACH)
555 ping_set_error (obj, "sendto", strerror (errno));
561 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
572 dprintf ("ph->hostname = %s\n", ph->hostname);
574 memset (buf, '\0', sizeof (buf));
575 icmp4 = (struct icmp *) buf;
576 data = (char *) (icmp4 + 1);
578 icmp4->icmp_type = ICMP_ECHO;
579 icmp4->icmp_code = 0;
580 icmp4->icmp_cksum = 0;
581 icmp4->icmp_id = htons (ph->ident);
582 icmp4->icmp_seq = htons (ph->sequence);
584 buflen = 4096 - sizeof (struct icmp);
585 strncpy (data, ph->data, buflen);
586 datalen = strlen (data);
588 buflen = datalen + sizeof (struct icmp);
590 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
592 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
594 status = ping_sendto (obj, ph, buf, buflen);
597 perror ("ping_sendto");
601 dprintf ("sendto: status = %i\n", status);
606 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
608 struct icmp6_hdr *icmp6;
617 dprintf ("ph->hostname = %s\n", ph->hostname);
619 memset (buf, '\0', sizeof (buf));
620 icmp6 = (struct icmp6_hdr *) buf;
621 data = (char *) (icmp6 + 1);
623 icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
624 icmp6->icmp6_code = 0;
625 /* The checksum will be calculated by the TCP/IP stack. */
627 icmp6->icmp6_cksum = 0;
628 icmp6->icmp6_id = htons (ph->ident);
629 icmp6->icmp6_seq = htons (ph->sequence);
631 buflen = 4096 - sizeof (struct icmp6_hdr);
632 strncpy (data, ph->data, buflen);
633 datalen = strlen (data);
635 buflen = datalen + sizeof (struct icmp6_hdr);
637 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
639 status = ping_sendto (obj, ph, buf, buflen);
642 perror ("ping_sendto");
646 dprintf ("sendto: status = %i\n", status);
651 static int ping_send_all (pingobj_t *obj)
661 for (ptr = ph; ptr != NULL; ptr = ptr->next)
663 /* start timer.. The GNU `ping6' starts the timer before
664 * sending the packet, so I will do that too */
665 if (gettimeofday (ptr->timer, NULL) == -1)
667 dprintf ("gettimeofday: %s\n", strerror (errno));
668 timerclear (ptr->timer);
674 dprintf ("timer set for hostname = %s\n", ptr->hostname);
677 if (ptr->addrfamily == AF_INET6)
679 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
680 if (ping_send_one_ipv6 (obj, ptr) != 0)
682 timerclear (ptr->timer);
687 else if (ptr->addrfamily == AF_INET)
689 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
690 if (ping_send_one_ipv4 (obj, ptr) != 0)
692 timerclear (ptr->timer);
697 else /* this should not happen */
699 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
700 timerclear (ptr->timer);
712 * Set the TTL of a socket protocol independently.
714 static int ping_set_ttl (pinghost_t *ph, int ttl)
718 if (ph->addrfamily == AF_INET)
720 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL, &ttl, sizeof (ttl));
722 else if (ph->addrfamily == AF_INET6)
724 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof (ttl));
730 static int ping_get_ident (void)
733 static int did_seed = 0;
739 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
743 if (read (fd, &seed, sizeof (seed)) != -1)
746 dprintf ("Random seed: %i\n", seed);
754 dprintf ("open (/dev/urandom): %s\n", strerror (errno));
758 retval = (int) random ();
760 dprintf ("Random number: %i\n", retval);
765 static pinghost_t *ping_alloc (void)
770 ph_size = sizeof (pinghost_t)
771 + sizeof (struct sockaddr_storage)
772 + sizeof (struct timeval);
774 ph = (pinghost_t *) malloc (ph_size);
778 memset (ph, '\0', ph_size);
780 ph->timer = (struct timeval *) (ph + 1);
781 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
783 ph->addrlen = sizeof (struct sockaddr_storage);
786 ph->ident = ping_get_ident () & 0xFFFF;
791 static void ping_free (pinghost_t *ph)
796 if (ph->username != NULL)
799 if (ph->hostname != NULL)
802 if (ph->data != NULL)
811 const char *ping_get_error (pingobj_t *obj)
813 return (obj->errmsg);
816 pingobj_t *ping_construct (void)
820 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
822 memset (obj, '\0', sizeof (pingobj_t));
824 obj->timeout = PING_DEF_TIMEOUT;
825 obj->ttl = PING_DEF_TTL;
826 obj->addrfamily = PING_DEF_AF;
827 obj->data = strdup (PING_DEF_DATA);
832 void ping_destroy (pingobj_t *obj)
840 while (current != NULL)
842 next = current->next;
847 if (obj->data != NULL)
850 if (obj->srcaddr != NULL)
858 int ping_setopt (pingobj_t *obj, int option, void *value)
864 case PING_OPT_TIMEOUT:
865 obj->timeout = *((double *) value);
866 if (obj->timeout < 0.0)
868 obj->timeout = PING_DEF_TIMEOUT;
874 obj->ttl = *((int *) value);
875 if ((obj->ttl < 1) || (obj->ttl > 255))
877 obj->ttl = PING_DEF_TTL;
883 obj->addrfamily = *((int *) value);
884 if ((obj->addrfamily != AF_UNSPEC)
885 && (obj->addrfamily != AF_INET)
886 && (obj->addrfamily != AF_INET6))
888 obj->addrfamily = PING_DEF_AF;
891 if (obj->srcaddr != NULL)
899 if (obj->data != NULL)
904 obj->data = strdup ((const char *) value);
907 case PING_OPT_SOURCE:
909 char *hostname = (char *) value;
910 struct addrinfo ai_hints;
911 struct addrinfo *ai_list;
914 if (obj->addrfamily != AF_UNSPEC)
916 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
919 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
920 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
921 #if defined(AI_ADDRCONFIG)
922 ai_hints.ai_flags = AI_ADDRCONFIG;
924 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
927 ping_set_error (obj, "getaddrinfo",
930 : gai_strerror (status));
935 if (ai_list->ai_next != NULL)
937 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
940 if (obj->srcaddr == NULL)
943 obj->srcaddr = (struct sockaddr_storage *) malloc (sizeof (struct sockaddr_storage));
944 if (obj->srcaddr == NULL)
946 ping_set_error (obj, "malloc",
949 freeaddrinfo (ai_list);
953 memset ((void *) obj->srcaddr, '\0', sizeof (struct sockaddr_storage));
954 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
955 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
956 ai_list->ai_addrlen);
957 obj->srcaddrlen = ai_list->ai_addrlen;
958 obj->addrfamily = ai_list->ai_family;
960 freeaddrinfo (ai_list);
961 } /* case PING_OPT_SOURCE */
966 } /* switch (option) */
969 } /* int ping_setopt */
972 int ping_send (pingobj_t *obj)
976 if (ping_send_all (obj) < 0)
979 if ((ret = ping_receive_all (obj)) < 0)
985 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
989 if (strcasecmp (ph->username, host) == 0)
998 int ping_host_add (pingobj_t *obj, const char *host)
1002 struct sockaddr_storage sockaddr;
1003 socklen_t sockaddr_len;
1005 struct addrinfo ai_hints;
1006 struct addrinfo *ai_list, *ai_ptr;
1009 dprintf ("host = %s\n", host);
1011 if (ping_host_search (obj->head, host) != NULL)
1014 memset (&ai_hints, '\0', sizeof (ai_hints));
1015 ai_hints.ai_flags = 0;
1016 #ifdef AI_ADDRCONFIG
1017 ai_hints.ai_flags |= AI_ADDRCONFIG;
1020 ai_hints.ai_flags |= AI_CANONNAME;
1022 ai_hints.ai_family = obj->addrfamily;
1023 ai_hints.ai_socktype = SOCK_RAW;
1025 if ((ph = ping_alloc ()) == NULL)
1027 dprintf ("Out of memory!\n");
1031 if ((ph->username = strdup (host)) == NULL)
1033 dprintf ("Out of memory!\n");
1034 ping_set_error (obj, "strdup", strerror (errno));
1039 if ((ph->hostname = strdup (host)) == NULL)
1041 dprintf ("Out of memory!\n");
1042 ping_set_error (obj, "strdup", strerror (errno));
1047 /* obj->data is not garuanteed to be != NULL */
1048 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1050 dprintf ("Out of memory!\n");
1051 ping_set_error (obj, "strdup", strerror (errno));
1056 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1058 dprintf ("getaddrinfo failed\n");
1059 ping_set_error (obj, "getaddrinfo",
1060 (ai_return == EAI_SYSTEM)
1062 : gai_strerror (ai_return));
1067 if (ai_list == NULL)
1068 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1070 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1074 sockaddr_len = sizeof (sockaddr);
1075 memset (&sockaddr, '\0', sockaddr_len);
1077 if (ai_ptr->ai_family == AF_INET)
1079 struct sockaddr_in *si;
1081 si = (struct sockaddr_in *) &sockaddr;
1082 si->sin_family = AF_INET;
1083 si->sin_port = htons (ph->ident);
1084 si->sin_addr.s_addr = htonl (INADDR_ANY);
1086 ai_ptr->ai_socktype = SOCK_RAW;
1087 ai_ptr->ai_protocol = IPPROTO_ICMP;
1089 else if (ai_ptr->ai_family == AF_INET6)
1091 struct sockaddr_in6 *si;
1093 si = (struct sockaddr_in6 *) &sockaddr;
1094 si->sin6_family = AF_INET6;
1095 si->sin6_port = htons (ph->ident);
1096 si->sin6_addr = in6addr_any;
1098 ai_ptr->ai_socktype = SOCK_RAW;
1099 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1103 char errmsg[PING_ERRMSG_LEN];
1105 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1106 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1109 ping_set_error (obj, "getaddrinfo", errmsg);
1113 /* TODO: Move this to a static function `ping_open_socket' and
1114 * call it whenever the socket dies. */
1115 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1118 dprintf ("socket: %s\n", strerror (errno));
1119 ping_set_error (obj, "socket", strerror (errno));
1123 if (obj->srcaddr != NULL)
1125 assert (obj->srcaddrlen > 0);
1126 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1128 if (bind (ph->fd, (struct sockaddr *) obj->srcaddr, obj->srcaddrlen) == -1)
1130 dprintf ("bind: %s\n", strerror (errno));
1131 ping_set_error (obj, "bind", strerror (errno));
1138 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1139 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1140 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1141 ph->addrlen = ai_ptr->ai_addrlen;
1142 ph->addrfamily = ai_ptr->ai_family;
1145 if ((ai_ptr->ai_canonname != NULL)
1146 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1150 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1151 ph->hostname, ai_ptr->ai_canonname);
1153 old_hostname = ph->hostname;
1154 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1156 /* strdup failed, falling back to old hostname */
1157 ph->hostname = old_hostname;
1159 else if (old_hostname != NULL)
1161 free (old_hostname);
1164 #endif /* AI_CANONNAME */
1169 freeaddrinfo (ai_list);
1178 * Adding in the front is much easier, but then the iterator will
1179 * return the host that was added last as first host. That's just not
1182 if (obj->head == NULL)
1191 while (hptr->next != NULL)
1194 assert ((hptr != NULL) && (hptr->next == NULL));
1198 ping_set_ttl (ph, obj->ttl);
1203 int ping_host_remove (pingobj_t *obj, const char *host)
1205 pinghost_t *pre, *cur;
1212 if (strcasecmp (host, cur->username) == 0)
1221 ping_set_error (obj, "ping_host_remove", "Host not found");
1226 obj->head = cur->next;
1228 pre->next = cur->next;
1235 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1237 return ((pingobj_iter_t *) obj->head);
1240 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1242 return ((pingobj_iter_t *) iter->next);
1245 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1246 void *buffer, size_t *buffer_len)
1250 size_t orig_buffer_len = *buffer_len;
1254 case PING_INFO_USERNAME:
1256 *buffer_len = strlen (iter->username);
1257 if (orig_buffer_len <= *buffer_len)
1259 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1260 * will copy `*buffer_len' and pad the rest of
1261 * `buffer' with null-bytes */
1262 strncpy (buffer, iter->username, orig_buffer_len);
1266 case PING_INFO_HOSTNAME:
1268 *buffer_len = strlen (iter->hostname);
1269 if (orig_buffer_len <= *buffer_len)
1271 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1272 * will copy `*buffer_len' and pad the rest of
1273 * `buffer' with null-bytes */
1274 strncpy (buffer, iter->hostname, orig_buffer_len);
1278 case PING_INFO_ADDRESS:
1279 ret = getnameinfo ((struct sockaddr *) iter->addr,
1287 if ((ret == EAI_MEMORY)
1289 || (ret == EAI_OVERFLOW)
1293 else if (ret == EAI_SYSTEM)
1300 case PING_INFO_FAMILY:
1302 *buffer_len = sizeof (int);
1303 if (orig_buffer_len < sizeof (int))
1305 *((int *) buffer) = iter->addrfamily;
1309 case PING_INFO_LATENCY:
1311 *buffer_len = sizeof (double);
1312 if (orig_buffer_len < sizeof (double))
1314 *((double *) buffer) = iter->latency;
1318 case PING_INFO_SEQUENCE:
1320 *buffer_len = sizeof (unsigned int);
1321 if (orig_buffer_len < sizeof (unsigned int))
1323 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1327 case PING_INFO_IDENT:
1329 *buffer_len = sizeof (uint16_t);
1330 if (orig_buffer_len < sizeof (uint16_t))
1332 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1336 case PING_INFO_DATA:
1338 *buffer_len = strlen (iter->data);
1339 if (orig_buffer_len < *buffer_len)
1341 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1349 void *ping_iterator_get_context (pingobj_iter_t *iter)
1351 return (iter->context);
1354 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1356 iter->context = context;