396f489f3d0b1d0d2f9ef382dbfc266f2ea0c189
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 < sizeof (struct icmphdr))
302 return (NULL);
304 icmp_hdr = (struct icmp *) buffer;
305 buffer += sizeof (struct icmphdr);
306 buffer_len -= sizeof (struct icmphdr);
308 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
309 {
310 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
311 return (NULL);
312 }
314 recv_checksum = icmp_hdr->icmp_cksum;
315 icmp_hdr->icmp_cksum = 0;
316 calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
317 sizeof (struct icmphdr) + buffer_len);
319 if (recv_checksum != calc_checksum)
320 {
321 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
322 "calculated 0x%04"PRIx16"\n",
323 recv_checksum, calc_checksum);
324 return (NULL);
325 }
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)
333 {
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)
338 continue;
340 if (!timerisset (ptr->timer))
341 continue;
343 if (ptr->ident != ident)
344 continue;
346 if (((ptr->sequence - 1) & 0xFFFF) != seq)
347 continue;
349 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
350 "seq = %"PRIu16"\n",
351 ptr->hostname, ident, seq);
353 break;
354 }
356 if (ptr == NULL)
357 {
358 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
359 ident, seq);
360 }
362 if (ptr != NULL){
363 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
364 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
365 }
366 return (ptr);
367 }
369 #ifndef ICMP6_ECHO_REQUEST
370 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
371 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
372 # else
373 # define ICMP6_ECHO_REQUEST 128
374 # endif
375 #endif
377 #ifndef ICMP6_ECHO_REPLY
378 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
379 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
380 # else
381 # define ICMP6_ECHO_REPLY 129
382 # endif
383 #endif
385 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
386 size_t buffer_len)
387 {
388 struct icmp6_hdr *icmp_hdr;
390 uint16_t ident;
391 uint16_t seq;
393 pinghost_t *ptr;
395 if (buffer_len < sizeof (struct icmp6_hdr))
396 return (NULL);
398 icmp_hdr = (struct icmp6_hdr *) buffer;
399 buffer += sizeof (struct icmp);
400 buffer_len -= sizeof (struct icmp);
402 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
403 {
404 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
405 return (NULL);
406 }
408 if (icmp_hdr->icmp6_code != 0)
409 {
410 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
411 return (NULL);
412 }
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)
420 {
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)
425 continue;
427 if (!timerisset (ptr->timer))
428 continue;
430 if (ptr->ident != ident)
431 continue;
433 if (((ptr->sequence - 1) & 0xFFFF) != seq)
434 continue;
436 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
437 "seq = %"PRIu16"\n",
438 ptr->hostname, ident, seq);
440 break;
441 }
443 if (ptr == NULL)
444 {
445 dprintf ("No match found for ident = 0x%04"PRIx16", "
446 "seq = %"PRIu16"\n",
447 ident, seq);
448 }
450 return (ptr);
451 }
453 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
454 struct timeval *now)
455 {
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;
462 int recv_ttl;
463 uint8_t recv_qos;
465 /*
466 * Set up the receive buffer..
467 */
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;
491 #ifdef MSG_XPG4_2
492 msghdr.msg_flags |= MSG_XPG4_2;
493 #endif
495 payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
496 if (payload_buffer_len < 0)
497 {
498 #if WITH_DEBUG
499 char errbuf[PING_ERRMSG_LEN];
500 dprintf ("recvfrom: %s\n",
501 sstrerror (errno, errbuf, sizeof (errbuf)));
502 #endif
503 return (-1);
504 }
505 dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
507 /* Iterate over all auxiliary data in msghdr */
508 recv_ttl = -1;
509 recv_qos = 0;
510 for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
511 cmsg != NULL;
512 cmsg = CMSG_NXTHDR (&msghdr, cmsg))
513 {
514 if (cmsg->cmsg_level == SOL_SOCKET)
515 {
516 #ifdef SO_TIMESTAMP
517 if (cmsg->cmsg_type == SO_TIMESTAMP)
518 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
519 #endif /* SO_TIMESTAMP */
520 }
521 else if (ph->addrfamily == AF_INET) /* {{{ */
522 {
523 if (cmsg->cmsg_level != IPPROTO_IP)
524 continue;
526 if (cmsg->cmsg_type == IP_TOS)
527 {
528 memcpy (&recv_qos, CMSG_DATA (cmsg),
529 sizeof (recv_qos));
530 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
531 } else
532 if (cmsg->cmsg_type == IP_TTL)
533 {
534 memcpy (&recv_ttl, CMSG_DATA (cmsg),
535 sizeof (recv_ttl));
536 dprintf ("TTLv4 = %i;\n", recv_ttl);
537 }
538 else
539 {
540 dprintf ("Not handling option %i.\n",
541 cmsg->cmsg_type);
542 }
543 } /* }}} */
544 else if (ph->addrfamily == AF_INET6) /* {{{ */
545 {
546 if (cmsg->cmsg_level != IPPROTO_IPV6)
547 continue;
549 if (cmsg->cmsg_type == IPV6_TCLASS)
550 {
551 memcpy (&recv_qos, CMSG_DATA (cmsg),
552 sizeof (recv_qos));
553 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
554 } else
555 #ifdef IPV6_HOPLIMIT
556 if (cmsg->cmsg_type == IPV6_HOPLIMIT)
557 {
558 memcpy (&recv_ttl, CMSG_DATA (cmsg),
559 sizeof (recv_ttl));
560 dprintf ("TTLv6 = %i;\n", recv_ttl);
561 }
562 else
563 #endif
564 #ifdef IPV6_UNICAST_HOPS
565 if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
566 {
567 memcpy (&recv_ttl, CMSG_DATA (cmsg),
568 sizeof (recv_ttl));
569 dprintf ("TTLv6 = %i;\n", recv_ttl);
570 }
571 else
572 #endif
573 #ifdef IPV6_MULTICAST_HOPS
574 if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
575 {
576 memcpy (&recv_ttl, CMSG_DATA (cmsg),
577 sizeof (recv_ttl));
578 dprintf ("TTLv6 = %i;\n", recv_ttl);
579 }
580 else
581 #endif
582 {
583 dprintf ("Not handling option %i.\n",
584 cmsg->cmsg_type);
585 }
586 } /* }}} */
587 else
588 {
589 dprintf ("Don't know how to handle "
590 "unknown protocol %i.\n",
591 cmsg->cmsg_level);
592 }
593 } /* }}} for (cmsg) */
595 if (ph->addrfamily == AF_INET)
596 {
597 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
598 if (host == NULL)
599 return (-1);
600 }
601 else if (ph->addrfamily == AF_INET6)
602 {
603 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
604 if (host == NULL)
605 return (-1);
606 }
607 else
608 {
609 dprintf ("ping_receive_one: Unknown address family %i.\n",
610 ph->addrfamily);
611 return (-1);
612 }
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)
622 {
623 timerclear (host->timer);
624 return (-1);
625 }
627 dprintf ("diff: %12i.%06i\n",
628 (int) diff.tv_sec,
629 (int) diff.tv_usec);
631 if (recv_ttl >= 0)
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);
640 return (0);
641 }
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)
647 {
648 fd_set read_fds;
649 fd_set err_fds;
650 int num_fds;
651 int max_fd;
653 pinghost_t *ph;
654 pinghost_t *ptr;
656 struct timeval endtime;
657 struct timeval nowtime;
658 struct timeval timeout;
659 int status;
661 int ret;
663 ph = obj->head;
664 ret = 0;
666 for (ptr = ph; ptr != NULL; ptr = ptr->next)
667 {
668 ptr->latency = -1.0;
669 ptr->recv_ttl = -1;
670 }
672 if (gettimeofday (&nowtime, NULL) == -1)
673 {
674 ping_set_errno (obj, errno);
675 return (-1);
676 }
678 /* Set up timeout */
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);
688 while (1)
689 {
690 FD_ZERO (&read_fds);
691 FD_ZERO (&err_fds);
692 num_fds = 0;
693 max_fd = -1;
695 for (ptr = ph; ptr != NULL; ptr = ptr->next)
696 {
697 if (!timerisset (ptr->timer))
698 continue;
700 FD_SET (ptr->fd, &read_fds);
701 FD_SET (ptr->fd, &err_fds);
702 num_fds++;
704 if (max_fd < ptr->fd)
705 max_fd = ptr->fd;
706 }
708 if (num_fds == 0)
709 break;
711 if (gettimeofday (&nowtime, NULL) == -1)
712 {
713 ping_set_errno (obj, errno);
714 return (-1);
715 }
717 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
718 break;
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)
727 {
728 ping_set_errno (obj, errno);
729 return (-1);
730 }
732 if ((status == -1) && (errno == EINTR))
733 {
734 dprintf ("select was interrupted by signal..\n");
735 ping_set_errno (obj, EINTR);
736 return (-EINTR);
737 }
738 else if (status < 0)
739 {
740 #if WITH_DEBUG
741 char errbuf[PING_ERRMSG_LEN];
742 dprintf ("select: %s\n",
743 sstrerror (errno, errbuf, sizeof (errbuf)));
744 #endif
745 break;
746 }
747 else if (status == 0)
748 {
749 dprintf ("select timed out\n");
750 for (ptr = ph; ptr != NULL; ptr = ptr->next)
751 if (ptr->latency < 0.0)
752 ptr->dropped++;
753 break;
754 }
756 for (ptr = ph; ptr != NULL; ptr = ptr->next)
757 {
758 if (FD_ISSET (ptr->fd, &read_fds))
759 {
760 if (ping_receive_one (obj, ptr, &nowtime) == 0)
761 ret++;
762 }
763 else if (FD_ISSET (ptr->fd, &err_fds))
764 {
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);
769 }
770 }
771 } /* while (1) */
773 return (ret);
774 } /* int ping_receive_all */
776 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
777 * Sending functions: *
778 * *
779 * ping_send_all *
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)
785 {
786 ssize_t ret;
788 if (gettimeofday (ph->timer, NULL) == -1)
789 {
790 timerclear (ph->timer);
791 return (-1);
792 }
794 ret = sendto (ph->fd, buf, buflen, 0,
795 (struct sockaddr *) ph->addr, ph->addrlen);
797 if (ret < 0)
798 {
799 #if defined(EHOSTUNREACH)
800 if (errno == EHOSTUNREACH)
801 return (0);
802 #endif
803 #if defined(ENETUNREACH)
804 if (errno == ENETUNREACH)
805 return (0);
806 #endif
807 ping_set_errno (obj, errno);
808 }
810 return (ret);
811 }
813 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
814 {
815 struct icmp *icmp4;
816 int status;
818 char buf[4096];
819 int buflen;
821 char *data;
822 int datalen;
824 dprintf ("ph->hostname = %s\n", ph->hostname);
826 memset (buf, '\0', sizeof (buf));
827 icmp4 = (struct icmp *) buf;
828 data = buf + sizeof (struct icmphdr);
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) - sizeof (struct icmphdr);
837 strncpy (data, ph->data, buflen);
838 datalen = strlen (data);
840 buflen = datalen + sizeof (struct icmphdr);
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);
847 if (status < 0)
848 {
849 perror ("ping_sendto");
850 return (-1);
851 }
853 dprintf ("sendto: status = %i\n", status);
855 return (0);
856 }
858 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
859 {
860 struct icmp6_hdr *icmp6;
861 int status;
863 char buf[4096];
864 int buflen;
866 char *data;
867 int datalen;
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. */
878 /* FIXME */
879 icmp6->icmp6_cksum = 0;
880 icmp6->icmp6_id = htons (ph->ident);
881 icmp6->icmp6_seq = htons (ph->sequence);
883 buflen = 4096 - sizeof (struct icmp6_hdr);
884 strncpy (data, ph->data, buflen);
885 datalen = strlen (data);
887 buflen = datalen + sizeof (struct icmp6_hdr);
889 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
891 status = ping_sendto (obj, ph, buf, buflen);
892 if (status < 0)
893 {
894 perror ("ping_sendto");
895 return (-1);
896 }
898 dprintf ("sendto: status = %i\n", status);
900 return (0);
901 }
903 static int ping_send_all (pingobj_t *obj)
904 {
905 pinghost_t *ph;
906 pinghost_t *ptr;
908 int ret;
910 ret = 0;
911 ph = obj->head;
913 for (ptr = ph; ptr != NULL; ptr = ptr->next)
914 {
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)
918 {
919 #if WITH_DEBUG
920 char errbuf[PING_ERRMSG_LEN];
921 dprintf ("gettimeofday: %s\n",
922 sstrerror (errno, errbuf, sizeof (errbuf)));
923 #endif
924 timerclear (ptr->timer);
925 ret--;
926 continue;
927 }
928 else
929 {
930 dprintf ("timer set for hostname = %s\n", ptr->hostname);
931 }
933 if (ptr->addrfamily == AF_INET6)
934 {
935 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
936 if (ping_send_one_ipv6 (obj, ptr) != 0)
937 {
938 timerclear (ptr->timer);
939 ret--;
940 continue;
941 }
942 }
943 else if (ptr->addrfamily == AF_INET)
944 {
945 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
946 if (ping_send_one_ipv4 (obj, ptr) != 0)
947 {
948 timerclear (ptr->timer);
949 ret--;
950 continue;
951 }
952 }
953 else /* this should not happen */
954 {
955 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
956 timerclear (ptr->timer);
957 ret--;
958 continue;
959 }
961 ptr->sequence++;
962 }
964 return (ret);
965 }
967 /*
968 * Set the TTL of a socket protocol independently.
969 */
970 static int ping_set_ttl (pinghost_t *ph, int ttl)
971 {
972 int ret = -2;
974 if (ph->addrfamily == AF_INET)
975 {
976 dprintf ("Setting TTLv4 to %i\n", ttl);
977 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
978 &ttl, sizeof (ttl));
979 }
980 else if (ph->addrfamily == AF_INET6)
981 {
982 dprintf ("Setting TTLv6 to %i\n", ttl);
983 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
984 &ttl, sizeof (ttl));
985 }
987 return (ret);
988 }
990 /*
991 * Set the TOS of a socket protocol independently.
992 *
993 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
994 * set this. See socket(7) for details.
995 */
996 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
997 {
998 int ret = EINVAL;
999 char errbuf[PING_ERRMSG_LEN];
1001 if (ph->addrfamily == AF_INET)
1002 {
1003 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
1004 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1005 &qos, sizeof (qos));
1006 if (ret != 0)
1007 {
1008 ret = errno;
1009 ping_set_error (obj, "ping_set_qos",
1010 sstrerror (ret, errbuf, sizeof (errbuf)));
1011 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1012 }
1013 }
1014 else if (ph->addrfamily == AF_INET6)
1015 {
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));
1022 if (ret != 0)
1023 {
1024 ret = errno;
1025 ping_set_error (obj, "ping_set_qos",
1026 sstrerror (ret, errbuf, sizeof (errbuf)));
1027 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1028 }
1029 }
1031 return (ret);
1032 }
1034 static int ping_get_ident (void)
1035 {
1036 int fd;
1037 static int did_seed = 0;
1039 int retval;
1041 if (did_seed == 0)
1042 {
1043 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1044 {
1045 unsigned int seed;
1047 if (read (fd, &seed, sizeof (seed)) != -1)
1048 {
1049 did_seed = 1;
1050 dprintf ("Random seed: %#x\n", seed);
1051 srandom (seed);
1052 }
1054 close (fd);
1055 }
1056 #if WITH_DEBUG
1057 else
1058 {
1059 char errbuf[PING_ERRMSG_LEN];
1060 dprintf ("open (/dev/urandom): %s\n",
1061 sstrerror (errno, errbuf, sizeof (errbuf)));
1062 }
1063 #endif
1064 }
1066 retval = (int) random ();
1068 dprintf ("Random number: %#x\n", retval);
1070 return (retval);
1071 }
1073 static pinghost_t *ping_alloc (void)
1074 {
1075 pinghost_t *ph;
1076 size_t ph_size;
1078 ph_size = sizeof (pinghost_t)
1079 + sizeof (struct sockaddr_storage)
1080 + sizeof (struct timeval);
1082 ph = (pinghost_t *) malloc (ph_size);
1083 if (ph == NULL)
1084 return (NULL);
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);
1092 ph->fd = -1;
1093 ph->latency = -1.0;
1094 ph->dropped = 0;
1095 ph->ident = ping_get_ident () & 0xFFFF;
1097 return (ph);
1098 }
1100 static void ping_free (pinghost_t *ph)
1101 {
1102 if (ph->fd >= 0)
1103 close (ph->fd);
1105 if (ph->username != NULL)
1106 free (ph->username);
1108 if (ph->hostname != NULL)
1109 free (ph->hostname);
1111 if (ph->data != NULL)
1112 free (ph->data);
1114 free (ph);
1115 }
1117 /*
1118 * public methods
1119 */
1120 const char *ping_get_error (pingobj_t *obj)
1121 {
1122 if (obj == NULL)
1123 return (NULL);
1124 return (obj->errmsg);
1125 }
1127 pingobj_t *ping_construct (void)
1128 {
1129 pingobj_t *obj;
1131 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1132 return (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);
1139 obj->qos = 0;
1141 return (obj);
1142 }
1144 void ping_destroy (pingobj_t *obj)
1145 {
1146 pinghost_t *current;
1147 pinghost_t *next;
1149 if (obj == NULL)
1150 return;
1152 current = obj->head;
1153 next = NULL;
1155 while (current != NULL)
1156 {
1157 next = current->next;
1158 ping_free (current);
1159 current = next;
1160 }
1162 if (obj->data != NULL)
1163 free (obj->data);
1165 if (obj->srcaddr != NULL)
1166 free (obj->srcaddr);
1168 if (obj->device != NULL)
1169 free (obj->device);
1171 free (obj);
1173 return;
1174 }
1176 int ping_setopt (pingobj_t *obj, int option, void *value)
1177 {
1178 int ret = 0;
1180 if ((obj == NULL) || (value == NULL))
1181 return (-1);
1183 switch (option)
1184 {
1185 case PING_OPT_QOS:
1186 {
1187 pinghost_t *ph;
1189 obj->qos = *((uint8_t *) value);
1190 for (ph = obj->head; ph != NULL; ph = ph->next)
1191 ping_set_qos (obj, ph, obj->qos);
1192 break;
1193 }
1195 case PING_OPT_TIMEOUT:
1196 obj->timeout = *((double *) value);
1197 if (obj->timeout < 0.0)
1198 {
1199 obj->timeout = PING_DEF_TIMEOUT;
1200 ret = -1;
1201 }
1202 break;
1204 case PING_OPT_TTL:
1205 obj->ttl = *((int *) value);
1206 if ((obj->ttl < 1) || (obj->ttl > 255))
1207 {
1208 obj->ttl = PING_DEF_TTL;
1209 ret = -1;
1210 }
1211 else
1212 {
1213 pinghost_t *ph;
1215 for (ph = obj->head; ph != NULL; ph = ph->next)
1216 ping_set_ttl (ph, obj->ttl);
1217 }
1218 break;
1220 case PING_OPT_AF:
1221 obj->addrfamily = *((int *) value);
1222 if ((obj->addrfamily != AF_UNSPEC)
1223 && (obj->addrfamily != AF_INET)
1224 && (obj->addrfamily != AF_INET6))
1225 {
1226 obj->addrfamily = PING_DEF_AF;
1227 ret = -1;
1228 }
1229 if (obj->srcaddr != NULL)
1230 {
1231 free (obj->srcaddr);
1232 obj->srcaddr = NULL;
1233 }
1234 break;
1236 case PING_OPT_DATA:
1237 if (obj->data != NULL)
1238 {
1239 free (obj->data);
1240 obj->data = NULL;
1241 }
1242 obj->data = strdup ((const char *) value);
1243 break;
1245 case PING_OPT_SOURCE:
1246 {
1247 char *hostname = (char *) value;
1248 struct addrinfo ai_hints;
1249 struct addrinfo *ai_list;
1250 int status;
1251 #if WITH_DEBUG
1252 if (obj->addrfamily != AF_UNSPEC)
1253 {
1254 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1255 }
1256 #endif
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;
1261 #endif
1262 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1263 if (status != 0)
1264 {
1265 #if defined(EAI_SYSTEM)
1266 char errbuf[PING_ERRMSG_LEN];
1267 #endif
1268 ping_set_error (obj, "getaddrinfo",
1269 #if defined(EAI_SYSTEM)
1270 (status == EAI_SYSTEM)
1271 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1272 #endif
1273 gai_strerror (status));
1274 ret = -1;
1275 break;
1276 }
1277 #if WITH_DEBUG
1278 if (ai_list->ai_next != NULL)
1279 {
1280 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1281 }
1282 #endif
1283 if (obj->srcaddr == NULL)
1284 {
1285 obj->srcaddrlen = 0;
1286 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1287 if (obj->srcaddr == NULL)
1288 {
1289 ping_set_errno (obj, errno);
1290 ret = -1;
1291 freeaddrinfo (ai_list);
1292 break;
1293 }
1294 }
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 */
1304 break;
1306 case PING_OPT_DEVICE:
1307 {
1308 #ifdef SO_BINDTODEVICE
1309 char *device = strdup ((char *) value);
1311 if (device == NULL)
1312 {
1313 ping_set_errno (obj, errno);
1314 ret = -1;
1315 break;
1316 }
1318 if (obj->device != NULL)
1319 free (obj->device);
1320 obj->device = device;
1321 #else /* ! SO_BINDTODEVICE */
1322 ping_set_errno (obj, ENOTSUP);
1323 ret = -1;
1324 #endif /* ! SO_BINDTODEVICE */
1325 } /* case PING_OPT_DEVICE */
1326 break;
1328 case PING_OPT_MARK:
1329 {
1330 #ifdef SO_MARK
1331 obj->mark = *(int*)(value);
1332 obj->set_mark = 1;
1333 #else /* SO_MARK */
1334 ping_set_errno (obj, ENOTSUP);
1335 ret = -1;
1336 #endif /* !SO_MARK */
1338 } /* case PING_OPT_MARK */
1339 break;
1341 default:
1342 ret = -2;
1343 } /* switch (option) */
1345 return (ret);
1346 } /* int ping_setopt */
1349 int ping_send (pingobj_t *obj)
1350 {
1351 if (obj == NULL)
1352 return (-1);
1354 if (ping_send_all (obj) < 0)
1355 return (-1);
1357 return (ping_receive_all (obj));
1358 }
1360 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1361 {
1362 while (ph != NULL)
1363 {
1364 if (strcasecmp (ph->username, host) == 0)
1365 break;
1367 ph = ph->next;
1368 }
1370 return (ph);
1371 }
1373 int ping_host_add (pingobj_t *obj, const char *host)
1374 {
1375 pinghost_t *ph;
1377 struct addrinfo ai_hints;
1378 struct addrinfo *ai_list, *ai_ptr;
1379 int ai_return;
1381 if ((obj == NULL) || (host == NULL))
1382 return (-1);
1384 dprintf ("host = %s\n", host);
1386 if (ping_host_search (obj->head, host) != NULL)
1387 return (0);
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;
1393 #endif
1394 #ifdef AI_CANONNAME
1395 ai_hints.ai_flags |= AI_CANONNAME;
1396 #endif
1397 ai_hints.ai_family = obj->addrfamily;
1398 ai_hints.ai_socktype = SOCK_RAW;
1400 if ((ph = ping_alloc ()) == NULL)
1401 {
1402 dprintf ("Out of memory!\n");
1403 return (-1);
1404 }
1406 if ((ph->username = strdup (host)) == NULL)
1407 {
1408 dprintf ("Out of memory!\n");
1409 ping_set_errno (obj, errno);
1410 ping_free (ph);
1411 return (-1);
1412 }
1414 if ((ph->hostname = strdup (host)) == NULL)
1415 {
1416 dprintf ("Out of memory!\n");
1417 ping_set_errno (obj, errno);
1418 ping_free (ph);
1419 return (-1);
1420 }
1422 /* obj->data is not garuanteed to be != NULL */
1423 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1424 {
1425 dprintf ("Out of memory!\n");
1426 ping_set_errno (obj, errno);
1427 ping_free (ph);
1428 return (-1);
1429 }
1431 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1432 {
1433 #if defined(EAI_SYSTEM)
1434 char errbuf[PING_ERRMSG_LEN];
1435 #endif
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)) :
1441 #endif
1442 gai_strerror (ai_return));
1443 ping_free (ph);
1444 return (-1);
1445 }
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)
1451 {
1452 ph->fd = -1;
1454 if (ai_ptr->ai_family == AF_INET)
1455 {
1456 ai_ptr->ai_socktype = SOCK_RAW;
1457 ai_ptr->ai_protocol = IPPROTO_ICMP;
1458 }
1459 else if (ai_ptr->ai_family == AF_INET6)
1460 {
1461 ai_ptr->ai_socktype = SOCK_RAW;
1462 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1463 }
1464 else
1465 {
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);
1473 continue;
1474 }
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);
1479 if (ph->fd == -1)
1480 {
1481 #if WITH_DEBUG
1482 char errbuf[PING_ERRMSG_LEN];
1483 dprintf ("socket: %s\n",
1484 sstrerror (errno, errbuf, sizeof (errbuf)));
1485 #endif
1486 ping_set_errno (obj, errno);
1487 continue;
1488 }
1490 if (obj->srcaddr != NULL)
1491 {
1492 assert (obj->srcaddrlen > 0);
1493 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1495 if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1496 {
1497 #if WITH_DEBUG
1498 char errbuf[PING_ERRMSG_LEN];
1499 dprintf ("bind: %s\n",
1500 sstrerror (errno, errbuf, sizeof (errbuf)));
1501 #endif
1502 ping_set_errno (obj, errno);
1503 close (ph->fd);
1504 ph->fd = -1;
1505 continue;
1506 }
1507 }
1509 #ifdef SO_BINDTODEVICE
1510 if (obj->device != NULL)
1511 {
1512 if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1513 obj->device, strlen (obj->device) + 1) != 0)
1514 {
1515 #if WITH_DEBUG
1516 char errbuf[PING_ERRMSG_LEN];
1517 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1518 sstrerror (errno, errbuf, sizeof (errbuf)));
1519 #endif
1520 ping_set_errno (obj, errno);
1521 close (ph->fd);
1522 ph->fd = -1;
1523 continue;
1524 }
1525 }
1526 #endif /* SO_BINDTODEVICE */
1527 #ifdef SO_MARK
1528 if(obj->set_mark)
1529 {
1530 if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
1531 {
1532 #if WITH_DEBUG
1533 char errbuf[PING_ERRMSG_LEN];
1534 dprintf ("setsockopt (SO_MARK): %s\n",
1535 sstrerror (errno, errbuf, sizeof (errbuf)));
1536 #endif
1537 ping_set_errno (obj, errno);
1538 close (ph->fd);
1539 ph->fd = -1;
1540 continue;
1541 }
1542 }
1543 #endif
1544 #ifdef SO_TIMESTAMP
1545 if (1) /* {{{ */
1546 {
1547 int status;
1548 int opt = 1;
1550 status = setsockopt (ph->fd,
1551 SOL_SOCKET, SO_TIMESTAMP,
1552 &opt, sizeof (opt));
1553 if (status != 0)
1554 {
1555 #if WITH_DEBUG
1556 char errbuf[PING_ERRMSG_LEN];
1557 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1558 sstrerror (errno, errbuf, sizeof (errbuf)));
1559 #endif
1560 ping_set_errno (obj, errno);
1561 close (ph->fd);
1562 ph->fd = -1;
1563 continue;
1564 }
1565 } /* }}} if (1) */
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;
1573 #ifdef AI_CANONNAME
1574 if ((ai_ptr->ai_canonname != NULL)
1575 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1576 {
1577 char *old_hostname;
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)
1584 {
1585 /* strdup failed, falling back to old hostname */
1586 ph->hostname = old_hostname;
1587 }
1588 else if (old_hostname != NULL)
1589 {
1590 free (old_hostname);
1591 }
1592 }
1593 #endif /* AI_CANONNAME */
1595 if (ph->addrfamily == AF_INET)
1596 {
1597 int opt;
1599 #ifdef IP_RECVTOS
1600 /* Enable receiving the TOS field */
1601 opt = 1;
1602 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1603 &opt, sizeof (opt));
1604 #endif /* IP_RECVTOS */
1606 /* Enable receiving the TTL field */
1607 opt = 1;
1608 setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1609 &opt, sizeof (opt));
1610 }
1611 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1612 else if (ph->addrfamily == AF_INET6)
1613 {
1614 int opt;
1616 # if defined(IPV6_RECVHOPLIMIT)
1617 /* For details see RFC 3542, section 6.3. */
1618 opt = 1;
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. */
1625 opt = 1;
1626 setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1627 &opt, sizeof (opt));
1628 # endif /* IPV6_RECVTCLASS */
1629 }
1630 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1632 break;
1633 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1635 freeaddrinfo (ai_list);
1637 if (ph->fd < 0)
1638 {
1639 ping_free (ph);
1640 return (-1);
1641 }
1643 /*
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
1646 * nice. -octo
1647 */
1648 if (obj->head == NULL)
1649 {
1650 obj->head = ph;
1651 }
1652 else
1653 {
1654 pinghost_t *hptr;
1656 hptr = obj->head;
1657 while (hptr->next != NULL)
1658 hptr = hptr->next;
1660 assert ((hptr != NULL) && (hptr->next == NULL));
1661 hptr->next = ph;
1662 }
1664 ping_set_ttl (ph, obj->ttl);
1665 ping_set_qos (obj, ph, obj->qos);
1667 return (0);
1668 } /* int ping_host_add */
1670 int ping_host_remove (pingobj_t *obj, const char *host)
1671 {
1672 pinghost_t *pre, *cur;
1674 if ((obj == NULL) || (host == NULL))
1675 return (-1);
1677 pre = NULL;
1678 cur = obj->head;
1680 while (cur != NULL)
1681 {
1682 if (strcasecmp (host, cur->username) == 0)
1683 break;
1685 pre = cur;
1686 cur = cur->next;
1687 }
1689 if (cur == NULL)
1690 {
1691 ping_set_error (obj, "ping_host_remove", "Host not found");
1692 return (-1);
1693 }
1695 if (pre == NULL)
1696 obj->head = cur->next;
1697 else
1698 pre->next = cur->next;
1700 ping_free (cur);
1702 return (0);
1703 }
1705 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1706 {
1707 if (obj == NULL)
1708 return (NULL);
1709 return ((pingobj_iter_t *) obj->head);
1710 }
1712 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1713 {
1714 if (iter == NULL)
1715 return (NULL);
1716 return ((pingobj_iter_t *) iter->next);
1717 }
1719 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1720 void *buffer, size_t *buffer_len)
1721 {
1722 int ret = EINVAL;
1724 size_t orig_buffer_len = *buffer_len;
1726 if ((iter == NULL) || (buffer_len == NULL))
1727 return (-1);
1729 if ((buffer == NULL) && (*buffer_len != 0 ))
1730 return (-1);
1732 switch (info)
1733 {
1734 case PING_INFO_USERNAME:
1735 ret = ENOMEM;
1736 *buffer_len = strlen (iter->username) + 1;
1737 if (orig_buffer_len <= *buffer_len)
1738 break;
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);
1743 ret = 0;
1744 break;
1746 case PING_INFO_HOSTNAME:
1747 ret = ENOMEM;
1748 *buffer_len = strlen (iter->hostname) + 1;
1749 if (orig_buffer_len < *buffer_len)
1750 break;
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);
1755 ret = 0;
1756 break;
1758 case PING_INFO_ADDRESS:
1759 ret = getnameinfo ((struct sockaddr *) iter->addr,
1760 iter->addrlen,
1761 (char *) buffer,
1762 *buffer_len,
1763 NULL, 0,
1764 NI_NUMERICHOST);
1765 if (ret != 0)
1766 {
1767 if ((ret == EAI_MEMORY)
1768 #ifdef EAI_OVERFLOW
1769 || (ret == EAI_OVERFLOW)
1770 #endif
1771 )
1772 ret = ENOMEM;
1773 #if defined(EAI_SYSTEM)
1774 else if (ret == EAI_SYSTEM)
1775 ret = errno;
1776 #endif
1777 else
1778 ret = EINVAL;
1779 }
1780 break;
1782 case PING_INFO_FAMILY:
1783 ret = ENOMEM;
1784 *buffer_len = sizeof (int);
1785 if (orig_buffer_len < sizeof (int))
1786 break;
1787 *((int *) buffer) = iter->addrfamily;
1788 ret = 0;
1789 break;
1791 case PING_INFO_LATENCY:
1792 ret = ENOMEM;
1793 *buffer_len = sizeof (double);
1794 if (orig_buffer_len < sizeof (double))
1795 break;
1796 *((double *) buffer) = iter->latency;
1797 ret = 0;
1798 break;
1800 case PING_INFO_DROPPED:
1801 ret = ENOMEM;
1802 *buffer_len = sizeof (uint32_t);
1803 if (orig_buffer_len < sizeof (uint32_t))
1804 break;
1805 *((uint32_t *) buffer) = iter->dropped;
1806 ret = 0;
1807 break;
1809 case PING_INFO_SEQUENCE:
1810 ret = ENOMEM;
1811 *buffer_len = sizeof (unsigned int);
1812 if (orig_buffer_len < sizeof (unsigned int))
1813 break;
1814 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1815 ret = 0;
1816 break;
1818 case PING_INFO_IDENT:
1819 ret = ENOMEM;
1820 *buffer_len = sizeof (uint16_t);
1821 if (orig_buffer_len < sizeof (uint16_t))
1822 break;
1823 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1824 ret = 0;
1825 break;
1827 case PING_INFO_DATA:
1828 ret = ENOMEM;
1829 *buffer_len = strlen (iter->data);
1830 if (orig_buffer_len < *buffer_len)
1831 break;
1832 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1833 ret = 0;
1834 break;
1836 case PING_INFO_RECV_TTL:
1837 ret = ENOMEM;
1838 *buffer_len = sizeof (int);
1839 if (orig_buffer_len < sizeof (int))
1840 break;
1841 *((int *) buffer) = iter->recv_ttl;
1842 ret = 0;
1843 break;
1845 case PING_INFO_RECV_QOS:
1846 ret = ENOMEM;
1847 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1848 if (!*buffer_len) *buffer_len=1;
1849 if (orig_buffer_len < *buffer_len)
1850 break;
1851 memcpy(buffer,&iter->recv_qos,*buffer_len);
1852 ret = 0;
1853 break;
1854 }
1856 return (ret);
1857 } /* ping_iterator_get_info */
1859 void *ping_iterator_get_context (pingobj_iter_t *iter)
1860 {
1861 if (iter == NULL)
1862 return (NULL);
1863 return (iter->context);
1864 }
1866 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1867 {
1868 if (iter == NULL)
1869 return;
1870 iter->context = context;
1871 }