1 /**
2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2016 Florian octo Forster <ff at octo.it>
4 *
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.
9 *
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
13 * for more details.
14 *
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
18 */
20 #ifdef __APPLE__
21 #define __APPLE_USE_RFC_3542
22 #endif
24 #if HAVE_CONFIG_H
25 # include <config.h>
26 #endif
28 #if STDC_HEADERS
29 # include <stdlib.h>
30 # include <stdio.h>
31 # include <string.h>
32 # include <inttypes.h>
33 # include <errno.h>
34 # include <assert.h>
35 #else
36 # error "You don't have the standard C99 header files installed"
37 #endif /* STDC_HEADERS */
39 #ifdef HAVE_STDINT_H
40 # include <stdint.h>
41 #endif
43 #if HAVE_UNISTD_H
44 # include <unistd.h>
45 #endif
47 #if HAVE_FCNTL_H
48 # include <fcntl.h>
49 #endif
50 #if HAVE_SYS_TYPES_H
51 # include <sys/types.h>
52 #endif
53 #if HAVE_SYS_STAT_H
54 # include <sys/stat.h>
55 #endif
57 #if TIME_WITH_SYS_TIME
58 # include <sys/time.h>
59 # include <time.h>
60 #else
61 # if HAVE_SYS_TIME_H
62 # include <sys/time.h>
63 # else
64 # include <time.h>
65 # endif
66 #endif
68 #if HAVE_SYS_SOCKET_H
69 # include <sys/socket.h>
70 #endif
72 #if HAVE_NETDB_H
73 # include <netdb.h>
74 #endif
76 #if HAVE_NETINET_IN_SYSTM_H
77 # include <netinet/in_systm.h>
78 #endif
79 #if HAVE_NETINET_IN_H
80 # include <netinet/in.h>
81 #endif
82 #if HAVE_NETINET_IP_H
83 # include <netinet/ip.h>
84 #endif
85 #if HAVE_NETINET_IP_ICMP_H
86 # include <netinet/ip_icmp.h>
87 #endif
88 #ifdef HAVE_NETINET_IP_VAR_H
89 # include <netinet/ip_var.h>
90 #endif
91 #if HAVE_NETINET_IP6_H
92 # include <netinet/ip6.h>
93 #endif
94 #if HAVE_NETINET_ICMP6_H
95 # include <netinet/icmp6.h>
96 #endif
98 #include "oping.h"
100 #if WITH_DEBUG
101 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
102 #else
103 # define dprintf(...) /**/
104 #endif
106 #define PING_ERRMSG_LEN 256
108 struct pinghost
109 {
110 /* username: name passed in by the user */
111 char *username;
112 /* hostname: name returned by the reverse lookup */
113 char *hostname;
114 struct sockaddr_storage *addr;
115 socklen_t addrlen;
116 int addrfamily;
117 int fd;
118 int ident;
119 int sequence;
120 struct timeval *timer;
121 double latency;
122 uint32_t dropped;
123 int recv_ttl;
124 uint8_t recv_qos;
125 char *data;
127 void *context;
129 struct pinghost *next;
130 };
132 struct pingobj
133 {
134 double timeout;
135 int ttl;
136 int addrfamily;
137 uint8_t qos;
138 char *data;
140 struct sockaddr *srcaddr;
141 socklen_t srcaddrlen;
143 char *device;
145 char set_mark;
146 int mark;
148 char errmsg[PING_ERRMSG_LEN];
150 pinghost_t *head;
151 };
153 /*
154 * private (static) functions
155 */
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)
160 {
161 buf[0] = 0;
163 #if !HAVE_STRERROR_R
164 {
165 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
166 }
167 /* #endif !HAVE_STRERROR_R */
169 #elif STRERROR_R_CHAR_P
170 {
171 char *temp;
172 temp = strerror_r (errnum, buf, buflen);
173 if (buf[0] == 0)
174 {
175 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
176 strncpy (buf, temp, buflen);
177 else
178 strncpy (buf, "strerror_r did not return "
179 "an error message", buflen);
180 }
181 }
182 /* #endif STRERROR_R_CHAR_P */
184 #else
185 if (strerror_r (errnum, buf, buflen) != 0)
186 {
187 snprintf (buf, buflen, "Error %i (%#x); "
188 "Additionally, strerror_r failed.",
189 errnum, errnum);
190 }
191 #endif /* STRERROR_R_CHAR_P */
193 buf[buflen - 1] = 0;
195 return (buf);
196 } /* char *sstrerror */
198 static void ping_set_error (pingobj_t *obj, const char *function,
199 const char *message)
200 {
201 snprintf (obj->errmsg, sizeof (obj->errmsg),
202 "%s: %s", function, message);
203 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
204 }
206 static void ping_set_errno (pingobj_t *obj, int error_number)
207 {
208 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
209 }
211 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
212 struct timeval *res)
213 {
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)
218 {
219 res->tv_usec -= 1000000;
220 res->tv_sec++;
221 }
223 return (0);
224 }
226 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
227 struct timeval *res)
228 {
229 if ((tv1->tv_sec < tv2->tv_sec)
230 || ((tv1->tv_sec == tv2->tv_sec)
231 && (tv1->tv_usec < tv2->tv_usec)))
232 return (-1);
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)
240 {
241 res->tv_usec += 1000000;
242 res->tv_sec--;
243 }
245 return (0);
246 }
248 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
249 {
250 uint32_t sum = 0;
251 uint16_t ret = 0;
253 uint16_t *ptr;
255 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
256 sum += *ptr;
258 if (len == 1)
259 {
260 *(char *) &ret = *(char *) ptr;
261 sum += ret;
262 }
264 /* Do this twice to get all possible carries.. */
265 sum = (sum >> 16) + (sum & 0xFFFF);
266 sum = (sum >> 16) + (sum & 0xFFFF);
268 ret = ~sum;
270 return (ret);
271 }
273 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
274 size_t buffer_len)
275 {
276 struct ip *ip_hdr;
277 struct icmp *icmp_hdr;
279 size_t ip_hdr_len;
281 uint16_t recv_checksum;
282 uint16_t calc_checksum;
284 uint16_t ident;
285 uint16_t seq;
287 pinghost_t *ptr;
289 if (buffer_len < sizeof (struct ip))
290 return (NULL);
292 ip_hdr = (struct ip *) buffer;
293 ip_hdr_len = ip_hdr->ip_hl << 2;
295 if (buffer_len < ip_hdr_len)
296 return (NULL);
298 buffer += ip_hdr_len;
299 buffer_len -= ip_hdr_len;
301 if (buffer_len < ICMP_MINLEN)
302 return (NULL);
304 icmp_hdr = (struct icmp *) buffer;
305 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
306 {
307 dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type);
308 return (NULL);
309 }
311 recv_checksum = icmp_hdr->icmp_cksum;
312 /* This writes to buffer. */
313 icmp_hdr->icmp_cksum = 0;
314 calc_checksum = ping_icmp4_checksum (buffer, buffer_len);
316 if (recv_checksum != calc_checksum)
317 {
318 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
319 "calculated 0x%04"PRIx16"\n",
320 recv_checksum, calc_checksum);
321 return (NULL);
322 }
324 ident = ntohs (icmp_hdr->icmp_id);
325 seq = ntohs (icmp_hdr->icmp_seq);
327 /* We have to iterate over all hosts, since ICMPv4 packets may
328 * be received on any raw v4 socket. */
329 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
330 {
331 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
332 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
334 if (ptr->addrfamily != AF_INET)
335 continue;
337 if (!timerisset (ptr->timer))
338 continue;
340 if (ptr->ident != ident)
341 continue;
343 if (((ptr->sequence - 1) & 0xFFFF) != seq)
344 continue;
346 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
347 "seq = %"PRIu16"\n",
348 ptr->hostname, ident, seq);
350 break;
351 }
353 if (ptr == NULL)
354 {
355 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
356 ident, seq);
357 }
359 if (ptr != NULL){
360 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
361 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
362 }
363 return (ptr);
364 }
366 #ifndef ICMP6_ECHO_REQUEST
367 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
368 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
369 # else
370 # define ICMP6_ECHO_REQUEST 128
371 # endif
372 #endif
374 #ifndef ICMP6_ECHO_REPLY
375 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
376 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
377 # else
378 # define ICMP6_ECHO_REPLY 129
379 # endif
380 #endif
382 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
383 size_t buffer_len)
384 {
385 struct icmp6_hdr *icmp_hdr;
387 uint16_t ident;
388 uint16_t seq;
390 pinghost_t *ptr;
392 if (buffer_len < ICMP_MINLEN)
393 return (NULL);
395 icmp_hdr = (struct icmp6_hdr *) buffer;
396 buffer += ICMP_MINLEN;
397 buffer_len -= ICMP_MINLEN;
399 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
400 {
401 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
402 return (NULL);
403 }
405 if (icmp_hdr->icmp6_code != 0)
406 {
407 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
408 return (NULL);
409 }
411 ident = ntohs (icmp_hdr->icmp6_id);
412 seq = ntohs (icmp_hdr->icmp6_seq);
414 /* We have to iterate over all hosts, since ICMPv6 packets may
415 * be received on any raw v6 socket. */
416 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
417 {
418 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
419 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
421 if (ptr->addrfamily != AF_INET6)
422 continue;
424 if (!timerisset (ptr->timer))
425 continue;
427 if (ptr->ident != ident)
428 continue;
430 if (((ptr->sequence - 1) & 0xFFFF) != seq)
431 continue;
433 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
434 "seq = %"PRIu16"\n",
435 ptr->hostname, ident, seq);
437 break;
438 }
440 if (ptr == NULL)
441 {
442 dprintf ("No match found for ident = 0x%04"PRIx16", "
443 "seq = %"PRIu16"\n",
444 ident, seq);
445 }
447 return (ptr);
448 }
450 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
451 struct timeval *now)
452 {
453 /* Note: 'ph' is not necessarily the host object for which we receive a
454 * reply. The right object will be returned by ping_receive_ipv*(). For
455 * now, we can only rely on ph->fd and ph->addrfamily. */
457 struct timeval diff, pkt_now = *now;
458 pinghost_t *host = NULL;
459 int recv_ttl;
460 uint8_t recv_qos;
462 /*
463 * Set up the receive buffer..
464 */
465 struct msghdr msghdr;
466 struct cmsghdr *cmsg;
467 char payload_buffer[4096];
468 ssize_t payload_buffer_len;
469 char control_buffer[4096];
470 struct iovec payload_iovec;
472 memset (&payload_iovec, 0, sizeof (payload_iovec));
473 payload_iovec.iov_base = payload_buffer;
474 payload_iovec.iov_len = sizeof (payload_buffer);
476 memset (&msghdr, 0, sizeof (msghdr));
477 /* unspecified source address */
478 msghdr.msg_name = NULL;
479 msghdr.msg_namelen = 0;
480 /* output buffer vector, see readv(2) */
481 msghdr.msg_iov = &payload_iovec;
482 msghdr.msg_iovlen = 1;
483 /* output buffer for control messages */
484 msghdr.msg_control = control_buffer;
485 msghdr.msg_controllen = sizeof (control_buffer);
486 /* flags; this is an output only field.. */
487 msghdr.msg_flags = 0;
488 #ifdef MSG_XPG4_2
489 msghdr.msg_flags |= MSG_XPG4_2;
490 #endif
492 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
493 if (payload_buffer_len < 0)
494 {
495 #if WITH_DEBUG
496 char errbuf[PING_ERRMSG_LEN];
497 dprintf ("recvfrom: %s\n",
498 sstrerror (errno, errbuf, sizeof (errbuf)));
499 #endif
500 return (-1);
501 }
502 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
504 /* Iterate over all auxiliary data in msghdr */
505 recv_ttl = -1;
506 recv_qos = 0;
507 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
508 cmsg != NULL;
509 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
510 {
511 if (cmsg->cmsg_level == SOL_SOCKET)
512 {
513 #ifdef SO_TIMESTAMP
514 if (cmsg->cmsg_type == SO_TIMESTAMP)
515 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
516 #endif /* SO_TIMESTAMP */
517 }
518 else if (ph->addrfamily == AF_INET) /* {{{ */
519 {
520 if (cmsg->cmsg_level != IPPROTO_IP)
521 continue;
523 if (cmsg->cmsg_type == IP_TOS)
524 {
525 memcpy (&recv_qos, CMSG_DATA (cmsg),
526 sizeof (recv_qos));
527 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
528 } else
529 if (cmsg->cmsg_type == IP_TTL)
530 {
531 memcpy (&recv_ttl, CMSG_DATA (cmsg),
532 sizeof (recv_ttl));
533 dprintf ("TTLv4 = %i;\n", recv_ttl);
534 }
535 else
536 {
537 dprintf ("Not handling option %i.\n",
538 cmsg->cmsg_type);
539 }
540 } /* }}} */
541 else if (ph->addrfamily == AF_INET6) /* {{{ */
542 {
543 if (cmsg->cmsg_level != IPPROTO_IPV6)
544 continue;
546 if (cmsg->cmsg_type == IPV6_TCLASS)
547 {
548 memcpy (&recv_qos, CMSG_DATA (cmsg),
549 sizeof (recv_qos));
550 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
551 } else
552 #ifdef IPV6_HOPLIMIT
553 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
554 {
555 memcpy (&recv_ttl, CMSG_DATA (cmsg),
556 sizeof (recv_ttl));
557 dprintf ("TTLv6 = %i;\n", recv_ttl);
558 }
559 else
560 #endif
561 #ifdef IPV6_UNICAST_HOPS
562 if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
563 {
564 memcpy (&recv_ttl, CMSG_DATA (cmsg),
565 sizeof (recv_ttl));
566 dprintf ("TTLv6 = %i;\n", recv_ttl);
567 }
568 else
569 #endif
570 #ifdef IPV6_MULTICAST_HOPS
571 if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
572 {
573 memcpy (&recv_ttl, CMSG_DATA (cmsg),
574 sizeof (recv_ttl));
575 dprintf ("TTLv6 = %i;\n", recv_ttl);
576 }
577 else
578 #endif
579 {
580 dprintf ("Not handling option %i.\n",
581 cmsg->cmsg_type);
582 }
583 } /* }}} */
584 else
585 {
586 dprintf ("Don't know how to handle "
587 "unknown protocol %i.\n",
588 cmsg->cmsg_level);
589 }
590 } /* }}} for (cmsg) */
592 if (ph->addrfamily == AF_INET)
593 {
594 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
595 if (host == NULL)
596 return (-1);
597 }
598 else if (ph->addrfamily == AF_INET6)
599 {
600 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
601 if (host == NULL)
602 return (-1);
603 }
604 else
605 {
606 dprintf ("ping_receive_one: Unknown address family %i.\n",
607 ph->addrfamily);
608 return (-1);
609 }
611 dprintf ("rcvd: %12i.%06i\n",
612 (int) pkt_now.tv_sec,
613 (int) pkt_now.tv_usec);
614 dprintf ("sent: %12i.%06i\n",
615 (int) host->timer->tv_sec,
616 (int) host->timer->tv_usec);
618 if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
619 {
620 timerclear (host->timer);
621 return (-1);
622 }
624 dprintf ("diff: %12i.%06i\n",
625 (int) diff.tv_sec,
626 (int) diff.tv_usec);
628 if (recv_ttl >= 0)
629 host->recv_ttl = recv_ttl;
630 host->recv_qos = recv_qos;
632 host->latency = ((double) diff.tv_usec) / 1000.0;
633 host->latency += ((double) diff.tv_sec) * 1000.0;
635 timerclear (host->timer);
637 return (0);
638 }
640 /* Blocks until a packet was received from all hosts or the timeout is reached.
641 * When interrupted, (-EINTR) is returned. On error, -1 is returned. On
642 * success, returns zero. */
643 static int ping_receive_all (pingobj_t *obj)
644 {
645 fd_set read_fds;
646 fd_set err_fds;
647 int num_fds;
648 int max_fd;
650 pinghost_t *ph;
651 pinghost_t *ptr;
653 struct timeval endtime;
654 struct timeval nowtime;
655 struct timeval timeout;
656 int status;
658 int ret;
660 ph = obj->head;
661 ret = 0;
663 for (ptr = ph; ptr != NULL; ptr = ptr->next)
664 {
665 ptr->latency = -1.0;
666 ptr->recv_ttl = -1;
667 }
669 if (gettimeofday (&nowtime, NULL) == -1)
670 {
671 ping_set_errno (obj, errno);
672 return (-1);
673 }
675 /* Set up timeout */
676 timeout.tv_sec = (time_t) obj->timeout;
677 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
679 dprintf ("Set timeout to %i.%06i seconds\n",
680 (int) timeout.tv_sec,
681 (int) timeout.tv_usec);
683 ping_timeval_add (&nowtime, &timeout, &endtime);
685 while (1)
686 {
687 FD_ZERO (&read_fds);
688 FD_ZERO (&err_fds);
689 num_fds = 0;
690 max_fd = -1;
692 for (ptr = ph; ptr != NULL; ptr = ptr->next)
693 {
694 if (!timerisset (ptr->timer))
695 continue;
697 FD_SET (ptr->fd, &read_fds);
698 FD_SET (ptr->fd, &err_fds);
699 num_fds++;
701 if (max_fd < ptr->fd)
702 max_fd = ptr->fd;
703 }
705 if (num_fds == 0)
706 break;
708 if (gettimeofday (&nowtime, NULL) == -1)
709 {
710 ping_set_errno (obj, errno);
711 return (-1);
712 }
714 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
715 break;
717 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
718 (int) timeout.tv_sec,
719 (int) timeout.tv_usec);
721 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
723 if (gettimeofday (&nowtime, NULL) == -1)
724 {
725 ping_set_errno (obj, errno);
726 return (-1);
727 }
729 if ((status == -1) && (errno == EINTR))
730 {
731 dprintf ("select was interrupted by signal..\n");
732 ping_set_errno (obj, EINTR);
733 return (-EINTR);
734 }
735 else if (status < 0)
736 {
737 #if WITH_DEBUG
738 char errbuf[PING_ERRMSG_LEN];
739 dprintf ("select: %s\n",
740 sstrerror (errno, errbuf, sizeof (errbuf)));
741 #endif
742 break;
743 }
744 else if (status == 0)
745 {
746 dprintf ("select timed out\n");
747 for (ptr = ph; ptr != NULL; ptr = ptr->next)
748 if (ptr->latency < 0.0)
749 ptr->dropped++;
750 break;
751 }
753 for (ptr = ph; ptr != NULL; ptr = ptr->next)
754 {
755 if (FD_ISSET (ptr->fd, &read_fds))
756 {
757 if (ping_receive_one (obj, ptr, &nowtime) == 0)
758 ret++;
759 }
760 else if (FD_ISSET (ptr->fd, &err_fds))
761 {
762 /* clear the timer in this case so that we
763 * don't run into an endless loop. */
764 /* TODO: Set an error flag in this case. */
765 timerclear (ptr->timer);
766 }
767 }
768 } /* while (1) */
770 return (ret);
771 } /* int ping_receive_all */
773 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
774 * Sending functions: *
775 * *
776 * ping_send_all *
777 * +-> ping_send_one_ipv4 *
778 * `-> ping_send_one_ipv6 *
779 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
780 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
781 const void *buf, size_t buflen)
782 {
783 ssize_t ret;
785 if (gettimeofday (ph->timer, NULL) == -1)
786 {
787 timerclear (ph->timer);
788 return (-1);
789 }
791 ret = sendto (ph->fd, buf, buflen, 0,
792 (struct sockaddr *) ph->addr, ph->addrlen);
794 if (ret < 0)
795 {
796 #if defined(EHOSTUNREACH)
797 if (errno == EHOSTUNREACH)
798 return (0);
799 #endif
800 #if defined(ENETUNREACH)
801 if (errno == ENETUNREACH)
802 return (0);
803 #endif
804 ping_set_errno (obj, errno);
805 }
807 return (ret);
808 }
810 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
811 {
812 struct icmp *icmp4;
813 int status;
815 char buf[4096] = {0};
816 size_t buflen;
818 char *data;
819 size_t datalen;
821 dprintf ("ph->hostname = %s\n", ph->hostname);
823 icmp4 = (struct icmp *) buf;
824 *icmp4 = (struct icmp) {
825 .icmp_type = ICMP_ECHO,
826 .icmp_id = htons (ph->ident),
827 .icmp_seq = htons (ph->sequence),
828 };
830 datalen = strlen (ph->data);
831 buflen = ICMP_MINLEN + datalen;
832 if (sizeof (buf) < buflen)
833 return (EINVAL);
835 data = buf + ICMP_MINLEN;
836 memcpy (data, ph->data, datalen);
838 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
840 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
842 status = ping_sendto (obj, ph, buf, buflen);
843 if (status < 0)
844 {
845 perror ("ping_sendto");
846 return (-1);
847 }
849 dprintf ("sendto: status = %i\n", status);
851 return (0);
852 }
854 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
855 {
856 struct icmp6_hdr *icmp6;
857 int status;
859 char buf[4096] = {0};
860 int buflen;
862 char *data;
863 int datalen;
865 dprintf ("ph->hostname = %s\n", ph->hostname);
867 icmp6 = (struct icmp6_hdr *) buf;
868 *icmp6 = (struct icmp6_hdr) {
869 .icmp6_type = ICMP6_ECHO_REQUEST,
870 .icmp6_id = htons (ph->ident),
871 .icmp6_seq = htons (ph->sequence),
872 };
874 datalen = strlen (ph->data);
875 buflen = sizeof (*icmp6) + datalen;
876 if (sizeof (buf) < buflen)
877 return (EINVAL);
879 data = buf + ICMP_MINLEN;
880 memcpy (data, ph->data, datalen);
882 /* The checksum will be calculated by the TCP/IP stack. */
884 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
886 status = ping_sendto (obj, ph, buf, buflen);
887 if (status < 0)
888 {
889 perror ("ping_sendto");
890 return (-1);
891 }
893 dprintf ("sendto: status = %i\n", status);
895 return (0);
896 }
898 static int ping_send_all (pingobj_t *obj)
899 {
900 pinghost_t *ph;
901 pinghost_t *ptr;
903 int ret;
905 ret = 0;
906 ph = obj->head;
908 for (ptr = ph; ptr != NULL; ptr = ptr->next)
909 {
910 /* start timer.. The GNU `ping6' starts the timer before
911 * sending the packet, so I will do that too */
912 if (gettimeofday (ptr->timer, NULL) == -1)
913 {
914 #if WITH_DEBUG
915 char errbuf[PING_ERRMSG_LEN];
916 dprintf ("gettimeofday: %s\n",
917 sstrerror (errno, errbuf, sizeof (errbuf)));
918 #endif
919 timerclear (ptr->timer);
920 ret--;
921 continue;
922 }
923 else
924 {
925 dprintf ("timer set for hostname = %s\n", ptr->hostname);
926 }
928 if (ptr->addrfamily == AF_INET6)
929 {
930 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
931 if (ping_send_one_ipv6 (obj, ptr) != 0)
932 {
933 timerclear (ptr->timer);
934 ret--;
935 continue;
936 }
937 }
938 else if (ptr->addrfamily == AF_INET)
939 {
940 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
941 if (ping_send_one_ipv4 (obj, ptr) != 0)
942 {
943 timerclear (ptr->timer);
944 ret--;
945 continue;
946 }
947 }
948 else /* this should not happen */
949 {
950 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
951 timerclear (ptr->timer);
952 ret--;
953 continue;
954 }
956 ptr->sequence++;
957 }
959 return (ret);
960 }
962 /*
963 * Set the TTL of a socket protocol independently.
964 */
965 static int ping_set_ttl (pinghost_t *ph, int ttl)
966 {
967 int ret = -2;
969 if (ph->addrfamily == AF_INET)
970 {
971 dprintf ("Setting TTLv4 to %i\n", ttl);
972 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
973 &ttl, sizeof (ttl));
974 }
975 else if (ph->addrfamily == AF_INET6)
976 {
977 dprintf ("Setting TTLv6 to %i\n", ttl);
978 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
979 &ttl, sizeof (ttl));
980 }
982 return (ret);
983 }
985 /*
986 * Set the TOS of a socket protocol independently.
987 *
988 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
989 * set this. See socket(7) for details.
990 */
991 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
992 {
993 int ret = EINVAL;
994 char errbuf[PING_ERRMSG_LEN];
996 if (ph->addrfamily == AF_INET)
997 {
998 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
999 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1000 &qos, sizeof (qos));
1001 if (ret != 0)
1002 {
1003 ret = errno;
1004 ping_set_error (obj, "ping_set_qos",
1005 sstrerror (ret, errbuf, sizeof (errbuf)));
1006 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1007 }
1008 }
1009 else if (ph->addrfamily == AF_INET6)
1010 {
1011 /* IPV6_TCLASS requires an "int". */
1012 int tmp = (int) qos;
1014 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1015 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1016 &tmp, sizeof (tmp));
1017 if (ret != 0)
1018 {
1019 ret = errno;
1020 ping_set_error (obj, "ping_set_qos",
1021 sstrerror (ret, errbuf, sizeof (errbuf)));
1022 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1023 }
1024 }
1026 return (ret);
1027 }
1029 static int ping_get_ident (void)
1030 {
1031 int fd;
1032 static int did_seed = 0;
1034 int retval;
1036 if (did_seed == 0)
1037 {
1038 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1039 {
1040 unsigned int seed;
1042 if (read (fd, &seed, sizeof (seed)) != -1)
1043 {
1044 did_seed = 1;
1045 dprintf ("Random seed: %#x\n", seed);
1046 srandom (seed);
1047 }
1049 close (fd);
1050 }
1051 #if WITH_DEBUG
1052 else
1053 {
1054 char errbuf[PING_ERRMSG_LEN];
1055 dprintf ("open (/dev/urandom): %s\n",
1056 sstrerror (errno, errbuf, sizeof (errbuf)));
1057 }
1058 #endif
1059 }
1061 retval = (int) random ();
1063 dprintf ("Random number: %#x\n", retval);
1065 return (retval);
1066 }
1068 static pinghost_t *ping_alloc (void)
1069 {
1070 pinghost_t *ph;
1071 size_t ph_size;
1073 ph_size = sizeof (pinghost_t)
1074 + sizeof (struct sockaddr_storage)
1075 + sizeof (struct timeval);
1077 ph = (pinghost_t *) malloc (ph_size);
1078 if (ph == NULL)
1079 return (NULL);
1081 memset (ph, '\0', ph_size);
1083 ph->timer = (struct timeval *) (ph + 1);
1084 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
1086 ph->addrlen = sizeof (struct sockaddr_storage);
1087 ph->fd = -1;
1088 ph->latency = -1.0;
1089 ph->dropped = 0;
1090 ph->ident = ping_get_ident () & 0xFFFF;
1092 return (ph);
1093 }
1095 static void ping_free (pinghost_t *ph)
1096 {
1097 if (ph->fd >= 0)
1098 close (ph->fd);
1100 if (ph->username != NULL)
1101 free (ph->username);
1103 if (ph->hostname != NULL)
1104 free (ph->hostname);
1106 if (ph->data != NULL)
1107 free (ph->data);
1109 free (ph);
1110 }
1112 /*
1113 * public methods
1114 */
1115 const char *ping_get_error (pingobj_t *obj)
1116 {
1117 if (obj == NULL)
1118 return (NULL);
1119 return (obj->errmsg);
1120 }
1122 pingobj_t *ping_construct (void)
1123 {
1124 pingobj_t *obj;
1126 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1127 return (NULL);
1128 memset (obj, 0, sizeof (pingobj_t));
1130 obj->timeout = PING_DEF_TIMEOUT;
1131 obj->ttl = PING_DEF_TTL;
1132 obj->addrfamily = PING_DEF_AF;
1133 obj->data = strdup (PING_DEF_DATA);
1134 obj->qos = 0;
1136 return (obj);
1137 }
1139 void ping_destroy (pingobj_t *obj)
1140 {
1141 pinghost_t *current;
1142 pinghost_t *next;
1144 if (obj == NULL)
1145 return;
1147 current = obj->head;
1148 next = NULL;
1150 while (current != NULL)
1151 {
1152 next = current->next;
1153 ping_free (current);
1154 current = next;
1155 }
1157 if (obj->data != NULL)
1158 free (obj->data);
1160 if (obj->srcaddr != NULL)
1161 free (obj->srcaddr);
1163 if (obj->device != NULL)
1164 free (obj->device);
1166 free (obj);
1168 return;
1169 }
1171 int ping_setopt (pingobj_t *obj, int option, void *value)
1172 {
1173 int ret = 0;
1175 if ((obj == NULL) || (value == NULL))
1176 return (-1);
1178 switch (option)
1179 {
1180 case PING_OPT_QOS:
1181 {
1182 pinghost_t *ph;
1184 obj->qos = *((uint8_t *) value);
1185 for (ph = obj->head; ph != NULL; ph = ph->next)
1186 ping_set_qos (obj, ph, obj->qos);
1187 break;
1188 }
1190 case PING_OPT_TIMEOUT:
1191 obj->timeout = *((double *) value);
1192 if (obj->timeout < 0.0)
1193 {
1194 obj->timeout = PING_DEF_TIMEOUT;
1195 ret = -1;
1196 }
1197 break;
1199 case PING_OPT_TTL:
1200 obj->ttl = *((int *) value);
1201 if ((obj->ttl < 1) || (obj->ttl > 255))
1202 {
1203 obj->ttl = PING_DEF_TTL;
1204 ret = -1;
1205 }
1206 else
1207 {
1208 pinghost_t *ph;
1210 for (ph = obj->head; ph != NULL; ph = ph->next)
1211 ping_set_ttl (ph, obj->ttl);
1212 }
1213 break;
1215 case PING_OPT_AF:
1216 obj->addrfamily = *((int *) value);
1217 if ((obj->addrfamily != AF_UNSPEC)
1218 && (obj->addrfamily != AF_INET)
1219 && (obj->addrfamily != AF_INET6))
1220 {
1221 obj->addrfamily = PING_DEF_AF;
1222 ret = -1;
1223 }
1224 if (obj->srcaddr != NULL)
1225 {
1226 free (obj->srcaddr);
1227 obj->srcaddr = NULL;
1228 }
1229 break;
1231 case PING_OPT_DATA:
1232 if (obj->data != NULL)
1233 {
1234 free (obj->data);
1235 obj->data = NULL;
1236 }
1237 obj->data = strdup ((const char *) value);
1238 break;
1240 case PING_OPT_SOURCE:
1241 {
1242 char *hostname = (char *) value;
1243 struct addrinfo ai_hints;
1244 struct addrinfo *ai_list;
1245 int status;
1246 #if WITH_DEBUG
1247 if (obj->addrfamily != AF_UNSPEC)
1248 {
1249 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1250 }
1251 #endif
1252 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1253 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1254 #if defined(AI_ADDRCONFIG)
1255 ai_hints.ai_flags = AI_ADDRCONFIG;
1256 #endif
1257 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1258 if (status != 0)
1259 {
1260 #if defined(EAI_SYSTEM)
1261 char errbuf[PING_ERRMSG_LEN];
1262 #endif
1263 ping_set_error (obj, "getaddrinfo",
1264 #if defined(EAI_SYSTEM)
1265 (status == EAI_SYSTEM)
1266 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1267 #endif
1268 gai_strerror (status));
1269 ret = -1;
1270 break;
1271 }
1272 #if WITH_DEBUG
1273 if (ai_list->ai_next != NULL)
1274 {
1275 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1276 }
1277 #endif
1278 if (obj->srcaddr == NULL)
1279 {
1280 obj->srcaddrlen = 0;
1281 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1282 if (obj->srcaddr == NULL)
1283 {
1284 ping_set_errno (obj, errno);
1285 ret = -1;
1286 freeaddrinfo (ai_list);
1287 break;
1288 }
1289 }
1290 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1291 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1292 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1293 ai_list->ai_addrlen);
1294 obj->srcaddrlen = ai_list->ai_addrlen;
1295 obj->addrfamily = ai_list->ai_family;
1297 freeaddrinfo (ai_list);
1298 } /* case PING_OPT_SOURCE */
1299 break;
1301 case PING_OPT_DEVICE:
1302 {
1303 #ifdef SO_BINDTODEVICE
1304 char *device = strdup ((char *) value);
1306 if (device == NULL)
1307 {
1308 ping_set_errno (obj, errno);
1309 ret = -1;
1310 break;
1311 }
1313 if (obj->device != NULL)
1314 free (obj->device);
1315 obj->device = device;
1316 #else /* ! SO_BINDTODEVICE */
1317 ping_set_errno (obj, ENOTSUP);
1318 ret = -1;
1319 #endif /* ! SO_BINDTODEVICE */
1320 } /* case PING_OPT_DEVICE */
1321 break;
1323 case PING_OPT_MARK:
1324 {
1325 #ifdef SO_MARK
1326 obj->mark = *(int*)(value);
1327 obj->set_mark = 1;
1328 #else /* SO_MARK */
1329 ping_set_errno (obj, ENOTSUP);
1330 ret = -1;
1331 #endif /* !SO_MARK */
1333 } /* case PING_OPT_MARK */
1334 break;
1336 default:
1337 ret = -2;
1338 } /* switch (option) */
1340 return (ret);
1341 } /* int ping_setopt */
1344 int ping_send (pingobj_t *obj)
1345 {
1346 if (obj == NULL)
1347 return (-1);
1349 if (ping_send_all (obj) < 0)
1350 return (-1);
1352 return (ping_receive_all (obj));
1353 }
1355 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1356 {
1357 while (ph != NULL)
1358 {
1359 if (strcasecmp (ph->username, host) == 0)
1360 break;
1362 ph = ph->next;
1363 }
1365 return (ph);
1366 }
1368 int ping_host_add (pingobj_t *obj, const char *host)
1369 {
1370 pinghost_t *ph;
1372 struct addrinfo ai_hints;
1373 struct addrinfo *ai_list, *ai_ptr;
1374 int ai_return;
1376 if ((obj == NULL) || (host == NULL))
1377 return (-1);
1379 dprintf ("host = %s\n", host);
1381 if (ping_host_search (obj->head, host) != NULL)
1382 return (0);
1384 memset (&ai_hints, '\0', sizeof (ai_hints));
1385 ai_hints.ai_flags = 0;
1386 #ifdef AI_ADDRCONFIG
1387 ai_hints.ai_flags |= AI_ADDRCONFIG;
1388 #endif
1389 #ifdef AI_CANONNAME
1390 ai_hints.ai_flags |= AI_CANONNAME;
1391 #endif
1392 ai_hints.ai_family = obj->addrfamily;
1393 ai_hints.ai_socktype = SOCK_RAW;
1395 if ((ph = ping_alloc ()) == NULL)
1396 {
1397 dprintf ("Out of memory!\n");
1398 return (-1);
1399 }
1401 if ((ph->username = strdup (host)) == NULL)
1402 {
1403 dprintf ("Out of memory!\n");
1404 ping_set_errno (obj, errno);
1405 ping_free (ph);
1406 return (-1);
1407 }
1409 if ((ph->hostname = strdup (host)) == NULL)
1410 {
1411 dprintf ("Out of memory!\n");
1412 ping_set_errno (obj, errno);
1413 ping_free (ph);
1414 return (-1);
1415 }
1417 /* obj->data is not garuanteed to be != NULL */
1418 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1419 {
1420 dprintf ("Out of memory!\n");
1421 ping_set_errno (obj, errno);
1422 ping_free (ph);
1423 return (-1);
1424 }
1426 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1427 {
1428 #if defined(EAI_SYSTEM)
1429 char errbuf[PING_ERRMSG_LEN];
1430 #endif
1431 dprintf ("getaddrinfo failed\n");
1432 ping_set_error (obj, "getaddrinfo",
1433 #if defined(EAI_SYSTEM)
1434 (ai_return == EAI_SYSTEM)
1435 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1436 #endif
1437 gai_strerror (ai_return));
1438 ping_free (ph);
1439 return (-1);
1440 }
1442 if (ai_list == NULL)
1443 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1445 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1446 {
1447 ph->fd = -1;
1449 if (ai_ptr->ai_family == AF_INET)
1450 {
1451 ai_ptr->ai_socktype = SOCK_RAW;
1452 ai_ptr->ai_protocol = IPPROTO_ICMP;
1453 }
1454 else if (ai_ptr->ai_family == AF_INET6)
1455 {
1456 ai_ptr->ai_socktype = SOCK_RAW;
1457 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1458 }
1459 else
1460 {
1461 char errmsg[PING_ERRMSG_LEN];
1463 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1464 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1466 dprintf ("%s", errmsg);
1467 ping_set_error (obj, "getaddrinfo", errmsg);
1468 continue;
1469 }
1471 /* TODO: Move this to a static function `ping_open_socket' and
1472 * call it whenever the socket dies. */
1473 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1474 if (ph->fd == -1)
1475 {
1476 #if WITH_DEBUG
1477 char errbuf[PING_ERRMSG_LEN];
1478 dprintf ("socket: %s\n",
1479 sstrerror (errno, errbuf, sizeof (errbuf)));
1480 #endif
1481 ping_set_errno (obj, errno);
1482 continue;
1483 }
1485 if (obj->srcaddr != NULL)
1486 {
1487 assert (obj->srcaddrlen > 0);
1488 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1490 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1491 {
1492 #if WITH_DEBUG
1493 char errbuf[PING_ERRMSG_LEN];
1494 dprintf ("bind: %s\n",
1495 sstrerror (errno, errbuf, sizeof (errbuf)));
1496 #endif
1497 ping_set_errno (obj, errno);
1498 close (ph->fd);
1499 ph->fd = -1;
1500 continue;
1501 }
1502 }
1504 #ifdef SO_BINDTODEVICE
1505 if (obj->device != NULL)
1506 {
1507 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1508 obj->device, strlen (obj->device) + 1) != 0)
1509 {
1510 #if WITH_DEBUG
1511 char errbuf[PING_ERRMSG_LEN];
1512 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1513 sstrerror (errno, errbuf, sizeof (errbuf)));
1514 #endif
1515 ping_set_errno (obj, errno);
1516 close (ph->fd);
1517 ph->fd = -1;
1518 continue;
1519 }
1520 }
1521 #endif /* SO_BINDTODEVICE */
1522 #ifdef SO_MARK
1523 if(obj->set_mark)
1524 {
1525 if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
1526 {
1527 #if WITH_DEBUG
1528 char errbuf[PING_ERRMSG_LEN];
1529 dprintf ("setsockopt (SO_MARK): %s\n",
1530 sstrerror (errno, errbuf, sizeof (errbuf)));
1531 #endif
1532 ping_set_errno (obj, errno);
1533 close (ph->fd);
1534 ph->fd = -1;
1535 continue;
1536 }
1537 }
1538 #endif
1539 #ifdef SO_TIMESTAMP
1540 if (1) /* {{{ */
1541 {
1542 int status;
1543 int opt = 1;
1545 status = setsockopt (ph->fd,
1546 SOL_SOCKET, SO_TIMESTAMP,
1547 &opt, sizeof (opt));
1548 if (status != 0)
1549 {
1550 #if WITH_DEBUG
1551 char errbuf[PING_ERRMSG_LEN];
1552 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1553 sstrerror (errno, errbuf, sizeof (errbuf)));
1554 #endif
1555 ping_set_errno (obj, errno);
1556 close (ph->fd);
1557 ph->fd = -1;
1558 continue;
1559 }
1560 } /* }}} if (1) */
1561 #endif /* SO_TIMESTAMP */
1562 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1563 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1564 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1565 ph->addrlen = ai_ptr->ai_addrlen;
1566 ph->addrfamily = ai_ptr->ai_family;
1568 #ifdef AI_CANONNAME
1569 if ((ai_ptr->ai_canonname != NULL)
1570 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1571 {
1572 char *old_hostname;
1574 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1575 ph->hostname, ai_ptr->ai_canonname);
1577 old_hostname = ph->hostname;
1578 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1579 {
1580 /* strdup failed, falling back to old hostname */
1581 ph->hostname = old_hostname;
1582 }
1583 else if (old_hostname != NULL)
1584 {
1585 free (old_hostname);
1586 }
1587 }
1588 #endif /* AI_CANONNAME */
1590 if (ph->addrfamily == AF_INET)
1591 {
1592 int opt;
1594 #ifdef IP_RECVTOS
1595 /* Enable receiving the TOS field */
1596 opt = 1;
1597 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1598 &opt, sizeof (opt));
1599 #endif /* IP_RECVTOS */
1601 /* Enable receiving the TTL field */
1602 opt = 1;
1603 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1604 &opt, sizeof (opt));
1605 }
1606 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1607 else if (ph->addrfamily == AF_INET6)
1608 {
1609 int opt;
1611 # if defined(IPV6_RECVHOPLIMIT)
1612 /* For details see RFC 3542, section 6.3. */
1613 opt = 1;
1614 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1615 &opt, sizeof (opt));
1616 # endif /* IPV6_RECVHOPLIMIT */
1618 # if defined(IPV6_RECVTCLASS)
1619 /* For details see RFC 3542, section 6.5. */
1620 opt = 1;
1621 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1622 &opt, sizeof (opt));
1623 # endif /* IPV6_RECVTCLASS */
1624 }
1625 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1627 break;
1628 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1630 freeaddrinfo (ai_list);
1632 if (ph->fd < 0)
1633 {
1634 ping_free (ph);
1635 return (-1);
1636 }
1638 /*
1639 * Adding in the front is much easier, but then the iterator will
1640 * return the host that was added last as first host. That's just not
1641 * nice. -octo
1642 */
1643 if (obj->head == NULL)
1644 {
1645 obj->head = ph;
1646 }
1647 else
1648 {
1649 pinghost_t *hptr;
1651 hptr = obj->head;
1652 while (hptr->next != NULL)
1653 hptr = hptr->next;
1655 assert ((hptr != NULL) && (hptr->next == NULL));
1656 hptr->next = ph;
1657 }
1659 ping_set_ttl (ph, obj->ttl);
1660 ping_set_qos (obj, ph, obj->qos);
1662 return (0);
1663 } /* int ping_host_add */
1665 int ping_host_remove (pingobj_t *obj, const char *host)
1666 {
1667 pinghost_t *pre, *cur;
1669 if ((obj == NULL) || (host == NULL))
1670 return (-1);
1672 pre = NULL;
1673 cur = obj->head;
1675 while (cur != NULL)
1676 {
1677 if (strcasecmp (host, cur->username) == 0)
1678 break;
1680 pre = cur;
1681 cur = cur->next;
1682 }
1684 if (cur == NULL)
1685 {
1686 ping_set_error (obj, "ping_host_remove", "Host not found");
1687 return (-1);
1688 }
1690 if (pre == NULL)
1691 obj->head = cur->next;
1692 else
1693 pre->next = cur->next;
1695 ping_free (cur);
1697 return (0);
1698 }
1700 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1701 {
1702 if (obj == NULL)
1703 return (NULL);
1704 return ((pingobj_iter_t *) obj->head);
1705 }
1707 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1708 {
1709 if (iter == NULL)
1710 return (NULL);
1711 return ((pingobj_iter_t *) iter->next);
1712 }
1714 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1715 void *buffer, size_t *buffer_len)
1716 {
1717 int ret = EINVAL;
1719 size_t orig_buffer_len = *buffer_len;
1721 if ((iter == NULL) || (buffer_len == NULL))
1722 return (-1);
1724 if ((buffer == NULL) && (*buffer_len != 0 ))
1725 return (-1);
1727 switch (info)
1728 {
1729 case PING_INFO_USERNAME:
1730 ret = ENOMEM;
1731 *buffer_len = strlen (iter->username) + 1;
1732 if (orig_buffer_len <= *buffer_len)
1733 break;
1734 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1735 * will copy `*buffer_len' and pad the rest of
1736 * `buffer' with null-bytes */
1737 strncpy (buffer, iter->username, orig_buffer_len);
1738 ret = 0;
1739 break;
1741 case PING_INFO_HOSTNAME:
1742 ret = ENOMEM;
1743 *buffer_len = strlen (iter->hostname) + 1;
1744 if (orig_buffer_len < *buffer_len)
1745 break;
1746 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1747 * will copy `*buffer_len' and pad the rest of
1748 * `buffer' with null-bytes */
1749 strncpy (buffer, iter->hostname, orig_buffer_len);
1750 ret = 0;
1751 break;
1753 case PING_INFO_ADDRESS:
1754 ret = getnameinfo ((struct sockaddr *) iter->addr,
1755 iter->addrlen,
1756 (char *) buffer,
1757 *buffer_len,
1758 NULL, 0,
1759 NI_NUMERICHOST);
1760 if (ret != 0)
1761 {
1762 if ((ret == EAI_MEMORY)
1763 #ifdef EAI_OVERFLOW
1764 || (ret == EAI_OVERFLOW)
1765 #endif
1766 )
1767 ret = ENOMEM;
1768 #if defined(EAI_SYSTEM)
1769 else if (ret == EAI_SYSTEM)
1770 ret = errno;
1771 #endif
1772 else
1773 ret = EINVAL;
1774 }
1775 break;
1777 case PING_INFO_FAMILY:
1778 ret = ENOMEM;
1779 *buffer_len = sizeof (int);
1780 if (orig_buffer_len < sizeof (int))
1781 break;
1782 *((int *) buffer) = iter->addrfamily;
1783 ret = 0;
1784 break;
1786 case PING_INFO_LATENCY:
1787 ret = ENOMEM;
1788 *buffer_len = sizeof (double);
1789 if (orig_buffer_len < sizeof (double))
1790 break;
1791 *((double *) buffer) = iter->latency;
1792 ret = 0;
1793 break;
1795 case PING_INFO_DROPPED:
1796 ret = ENOMEM;
1797 *buffer_len = sizeof (uint32_t);
1798 if (orig_buffer_len < sizeof (uint32_t))
1799 break;
1800 *((uint32_t *) buffer) = iter->dropped;
1801 ret = 0;
1802 break;
1804 case PING_INFO_SEQUENCE:
1805 ret = ENOMEM;
1806 *buffer_len = sizeof (unsigned int);
1807 if (orig_buffer_len < sizeof (unsigned int))
1808 break;
1809 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1810 ret = 0;
1811 break;
1813 case PING_INFO_IDENT:
1814 ret = ENOMEM;
1815 *buffer_len = sizeof (uint16_t);
1816 if (orig_buffer_len < sizeof (uint16_t))
1817 break;
1818 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1819 ret = 0;
1820 break;
1822 case PING_INFO_DATA:
1823 ret = ENOMEM;
1824 *buffer_len = strlen (iter->data);
1825 if (orig_buffer_len < *buffer_len)
1826 break;
1827 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1828 ret = 0;
1829 break;
1831 case PING_INFO_RECV_TTL:
1832 ret = ENOMEM;
1833 *buffer_len = sizeof (int);
1834 if (orig_buffer_len < sizeof (int))
1835 break;
1836 *((int *) buffer) = iter->recv_ttl;
1837 ret = 0;
1838 break;
1840 case PING_INFO_RECV_QOS:
1841 ret = ENOMEM;
1842 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1843 if (!*buffer_len) *buffer_len=1;
1844 if (orig_buffer_len < *buffer_len)
1845 break;
1846 memcpy(buffer,&iter->recv_qos,*buffer_len);
1847 ret = 0;
1848 break;
1849 }
1851 return (ret);
1852 } /* ping_iterator_get_info */
1854 void *ping_iterator_get_context (pingobj_iter_t *iter)
1855 {
1856 if (iter == NULL)
1857 return (NULL);
1858 return (iter->context);
1859 }
1861 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1862 {
1863 if (iter == NULL)
1864 return;
1865 iter->context = context;
1866 }