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
107 #define PING_TABLE_LEN 5381
109 struct pinghost
110 {
111 /* username: name passed in by the user */
112 char *username;
113 /* hostname: name returned by the reverse lookup */
114 char *hostname;
115 struct sockaddr_storage *addr;
116 socklen_t addrlen;
117 int addrfamily;
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 struct pinghost *table_next;
131 };
133 struct pingobj
134 {
135 double timeout;
136 int ttl;
137 int addrfamily;
138 uint8_t qos;
139 char *data;
141 int fd4;
142 int fd6;
144 struct sockaddr *srcaddr;
145 socklen_t srcaddrlen;
147 char *device;
149 char set_mark;
150 int mark;
152 char errmsg[PING_ERRMSG_LEN];
154 pinghost_t *head;
155 pinghost_t *table[PING_TABLE_LEN];
156 };
158 /*
159 * private (static) functions
160 */
161 /* Even though Posix requires "strerror_r" to return an "int",
162 * some systems (e.g. the GNU libc) return a "char *" _and_
163 * ignore the second argument ... -tokkee */
164 static char *sstrerror (int errnum, char *buf, size_t buflen)
165 {
166 buf[0] = 0;
168 #if !HAVE_STRERROR_R
169 {
170 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
171 }
172 /* #endif !HAVE_STRERROR_R */
174 #elif STRERROR_R_CHAR_P
175 {
176 char *temp;
177 temp = strerror_r (errnum, buf, buflen);
178 if (buf[0] == 0)
179 {
180 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
181 strncpy (buf, temp, buflen);
182 else
183 strncpy (buf, "strerror_r did not return "
184 "an error message", buflen);
185 }
186 }
187 /* #endif STRERROR_R_CHAR_P */
189 #else
190 if (strerror_r (errnum, buf, buflen) != 0)
191 {
192 snprintf (buf, buflen, "Error %i (%#x); "
193 "Additionally, strerror_r failed.",
194 errnum, errnum);
195 }
196 #endif /* STRERROR_R_CHAR_P */
198 buf[buflen - 1] = 0;
200 return (buf);
201 } /* char *sstrerror */
203 static void ping_set_error (pingobj_t *obj, const char *function,
204 const char *message)
205 {
206 snprintf (obj->errmsg, sizeof (obj->errmsg),
207 "%s: %s", function, message);
208 obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
209 }
211 static void ping_set_errno (pingobj_t *obj, int error_number)
212 {
213 sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
214 }
216 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
217 struct timeval *res)
218 {
219 res->tv_sec = tv1->tv_sec + tv2->tv_sec;
220 res->tv_usec = tv1->tv_usec + tv2->tv_usec;
222 while (res->tv_usec > 1000000)
223 {
224 res->tv_usec -= 1000000;
225 res->tv_sec++;
226 }
228 return (0);
229 }
231 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
232 struct timeval *res)
233 {
234 if ((tv1->tv_sec < tv2->tv_sec)
235 || ((tv1->tv_sec == tv2->tv_sec)
236 && (tv1->tv_usec < tv2->tv_usec)))
237 return (-1);
239 res->tv_sec = tv1->tv_sec - tv2->tv_sec;
240 res->tv_usec = tv1->tv_usec - tv2->tv_usec;
242 assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
244 while (res->tv_usec < 0)
245 {
246 res->tv_usec += 1000000;
247 res->tv_sec--;
248 }
250 return (0);
251 }
253 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
254 {
255 uint32_t sum = 0;
256 uint16_t ret = 0;
258 uint16_t *ptr;
260 for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
261 sum += *ptr;
263 if (len == 1)
264 {
265 *(char *) &ret = *(char *) ptr;
266 sum += ret;
267 }
269 /* Do this twice to get all possible carries.. */
270 sum = (sum >> 16) + (sum & 0xFFFF);
271 sum = (sum >> 16) + (sum & 0xFFFF);
273 ret = ~sum;
275 return (ret);
276 }
278 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
279 size_t buffer_len)
280 {
281 struct ip *ip_hdr;
282 struct icmp *icmp_hdr;
284 size_t ip_hdr_len;
286 uint16_t recv_checksum;
287 uint16_t calc_checksum;
289 uint16_t ident;
290 uint16_t seq;
292 pinghost_t *ptr;
294 if (buffer_len < sizeof (struct ip))
295 return (NULL);
297 ip_hdr = (struct ip *) buffer;
298 ip_hdr_len = ip_hdr->ip_hl << 2;
300 if (buffer_len < ip_hdr_len)
301 return (NULL);
303 buffer += ip_hdr_len;
304 buffer_len -= ip_hdr_len;
306 if (buffer_len < ICMP_MINLEN)
307 return (NULL);
309 icmp_hdr = (struct icmp *) buffer;
310 if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
311 {
312 dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type);
313 return (NULL);
314 }
316 recv_checksum = icmp_hdr->icmp_cksum;
317 /* This writes to buffer. */
318 icmp_hdr->icmp_cksum = 0;
319 calc_checksum = ping_icmp4_checksum (buffer, buffer_len);
321 if (recv_checksum != calc_checksum)
322 {
323 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
324 "calculated 0x%04"PRIx16"\n",
325 recv_checksum, calc_checksum);
326 return (NULL);
327 }
329 ident = ntohs (icmp_hdr->icmp_id);
330 seq = ntohs (icmp_hdr->icmp_seq);
332 for (ptr = obj->table[ident % PING_TABLE_LEN];
333 ptr != NULL; ptr = ptr->table_next)
334 {
335 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
336 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
338 if (ptr->addrfamily != AF_INET)
339 continue;
341 if (!timerisset (ptr->timer))
342 continue;
344 if (ptr->ident != ident)
345 continue;
347 if (((ptr->sequence - 1) & 0xFFFF) != seq)
348 continue;
350 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
351 "seq = %"PRIu16"\n",
352 ptr->hostname, ident, seq);
354 break;
355 }
357 if (ptr == NULL)
358 {
359 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
360 ident, seq);
361 }
363 if (ptr != NULL){
364 ptr->recv_ttl = (int) ip_hdr->ip_ttl;
365 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
366 }
367 return (ptr);
368 }
370 #ifndef ICMP6_ECHO_REQUEST
371 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
372 # define ICMP6_ECHO_REQUEST ICMP6_ECHO
373 # else
374 # define ICMP6_ECHO_REQUEST 128
375 # endif
376 #endif
378 #ifndef ICMP6_ECHO_REPLY
379 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
380 # define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
381 # else
382 # define ICMP6_ECHO_REPLY 129
383 # endif
384 #endif
386 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
387 size_t buffer_len)
388 {
389 struct icmp6_hdr *icmp_hdr;
391 uint16_t ident;
392 uint16_t seq;
394 pinghost_t *ptr;
396 if (buffer_len < ICMP_MINLEN)
397 return (NULL);
399 icmp_hdr = (struct icmp6_hdr *) buffer;
400 buffer += ICMP_MINLEN;
401 buffer_len -= ICMP_MINLEN;
403 if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
404 {
405 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
406 return (NULL);
407 }
409 if (icmp_hdr->icmp6_code != 0)
410 {
411 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
412 return (NULL);
413 }
415 ident = ntohs (icmp_hdr->icmp6_id);
416 seq = ntohs (icmp_hdr->icmp6_seq);
418 /* We have to iterate over all hosts, since ICMPv6 packets may
419 * be received on any raw v6 socket. */
420 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
421 {
422 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
423 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
425 if (ptr->addrfamily != AF_INET6)
426 continue;
428 if (!timerisset (ptr->timer))
429 continue;
431 if (ptr->ident != ident)
432 continue;
434 if (((ptr->sequence - 1) & 0xFFFF) != seq)
435 continue;
437 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
438 "seq = %"PRIu16"\n",
439 ptr->hostname, ident, seq);
441 break;
442 }
444 if (ptr == NULL)
445 {
446 dprintf ("No match found for ident = 0x%04"PRIx16", "
447 "seq = %"PRIu16"\n",
448 ident, seq);
449 }
451 return (ptr);
452 }
454 static int ping_receive_one (pingobj_t *obj, struct timeval *now, int addrfam)
455 {
456 int fd = addrfam == AF_INET6 ? obj->fd6 : obj->fd4;
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 (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, 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 (addrfam == 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 (addrfam == 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 (addrfam == 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 (addrfam == 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 addrfam);
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 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
641 * Sending functions: *
642 * *
643 * ping_send_all *
644 * +-> ping_send_one_ipv4 *
645 * `-> ping_send_one_ipv6 *
646 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
647 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
648 const void *buf, size_t buflen, int fd)
649 {
650 ssize_t ret;
652 if (gettimeofday (ph->timer, NULL) == -1)
653 {
654 timerclear (ph->timer);
655 return (-1);
656 }
658 ret = sendto (fd, buf, buflen, 0,
659 (struct sockaddr *) ph->addr, ph->addrlen);
661 if (ret < 0)
662 {
663 #if defined(EHOSTUNREACH)
664 if (errno == EHOSTUNREACH)
665 return (0);
666 #endif
667 #if defined(ENETUNREACH)
668 if (errno == ENETUNREACH)
669 return (0);
670 #endif
671 ping_set_errno (obj, errno);
672 }
674 return (ret);
675 }
677 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph, int fd)
678 {
679 struct icmp *icmp4;
680 int status;
682 char buf[4096] = {0};
683 size_t buflen;
685 char *data;
686 size_t datalen;
688 dprintf ("ph->hostname = %s\n", ph->hostname);
690 icmp4 = (struct icmp *) buf;
691 *icmp4 = (struct icmp) {
692 .icmp_type = ICMP_ECHO,
693 .icmp_id = htons (ph->ident),
694 .icmp_seq = htons (ph->sequence),
695 };
697 datalen = strlen (ph->data);
698 buflen = ICMP_MINLEN + datalen;
699 if (sizeof (buf) < buflen)
700 return (EINVAL);
702 data = buf + ICMP_MINLEN;
703 memcpy (data, ph->data, datalen);
705 icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
707 dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
709 status = ping_sendto (obj, ph, buf, buflen, fd);
710 if (status < 0)
711 {
712 perror ("ping_sendto");
713 return (-1);
714 }
716 dprintf ("sendto: status = %i\n", status);
718 return (0);
719 }
721 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph, int fd)
722 {
723 struct icmp6_hdr *icmp6;
724 int status;
726 char buf[4096] = {0};
727 int buflen;
729 char *data;
730 int datalen;
732 dprintf ("ph->hostname = %s\n", ph->hostname);
734 icmp6 = (struct icmp6_hdr *) buf;
735 *icmp6 = (struct icmp6_hdr) {
736 .icmp6_type = ICMP6_ECHO_REQUEST,
737 .icmp6_id = htons (ph->ident),
738 .icmp6_seq = htons (ph->sequence),
739 };
741 datalen = strlen (ph->data);
742 buflen = sizeof (*icmp6) + datalen;
743 if (sizeof (buf) < buflen)
744 return (EINVAL);
746 data = buf + ICMP_MINLEN;
747 memcpy (data, ph->data, datalen);
749 /* The checksum will be calculated by the TCP/IP stack. */
751 dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
753 status = ping_sendto (obj, ph, buf, buflen, fd);
754 if (status < 0)
755 {
756 perror ("ping_sendto");
757 return (-1);
758 }
760 dprintf ("sendto: status = %i\n", status);
762 return (0);
763 }
765 static int ping_send_one (pingobj_t *obj, pinghost_t *ptr, int fd)
766 {
767 if (gettimeofday (ptr->timer, NULL) == -1)
768 {
769 /* start timer.. The GNU `ping6' starts the timer before
770 * sending the packet, so I will do that too */
771 #if WITH_DEBUG
772 char errbuf[PING_ERRMSG_LEN];
773 dprintf ("gettimeofday: %s\n",
774 sstrerror (errno, errbuf, sizeof (errbuf)));
775 #endif
776 timerclear (ptr->timer);
777 return (-1);
778 }
779 else
780 {
781 dprintf ("timer set for hostname = %s\n", ptr->hostname);
782 }
784 if (ptr->addrfamily == AF_INET6)
785 {
786 dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
787 if (ping_send_one_ipv6 (obj, ptr, fd) != 0)
788 {
789 timerclear (ptr->timer);
790 return (-1);
791 }
792 }
793 else if (ptr->addrfamily == AF_INET)
794 {
795 dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
796 if (ping_send_one_ipv4 (obj, ptr, fd) != 0)
797 {
798 timerclear (ptr->timer);
799 return (-1);
800 }
801 }
802 else /* this should not happen */
803 {
804 dprintf ("Unknown address family: %i\n", ptr->addrfamily);
805 timerclear (ptr->timer);
806 return (-1);
807 }
809 ptr->sequence++;
811 return (0);
812 }
814 /*
815 * Set the TTL of a socket protocol independently.
816 */
817 static int ping_set_ttl (pingobj_t *obj, int ttl)
818 {
819 int ret = 0;
820 char errbuf[PING_ERRMSG_LEN];
822 if (obj->fd4 != -1)
823 {
824 if (setsockopt (obj->fd4, IPPROTO_IP, IP_TTL,
825 &ttl, sizeof (ttl)))
826 {
827 ret = errno;
828 ping_set_error (obj, "ping_set_ttl",
829 sstrerror (ret, errbuf, sizeof (errbuf)));
830 dprintf ("Setting TTLv4 failed: %s\n", errbuf);
831 }
832 }
834 if (obj->fd6 != -1)
835 {
836 dprintf ("Setting TTLv6 to %i\n", ttl);
837 if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
838 &ttl, sizeof (ttl)))
839 {
840 ret = errno;
841 ping_set_error (obj, "ping_set_ttl",
842 sstrerror (ret, errbuf, sizeof (errbuf)));
843 dprintf ("Setting TTLv6 failed: %s\n", errbuf);
844 }
845 }
847 return (ret);
848 }
850 /*
851 * Set the TOS of a socket protocol independently.
852 *
853 * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
854 * set this. See socket(7) for details.
855 */
856 static int ping_set_qos (pingobj_t *obj, uint8_t qos)
857 {
858 int ret = 0;
859 char errbuf[PING_ERRMSG_LEN];
861 if (obj->fd4 != -1)
862 {
863 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
864 if (setsockopt (obj->fd4, IPPROTO_IP, IP_TOS,
865 &qos, sizeof (qos)))
866 {
867 ret = errno;
868 ping_set_error (obj, "ping_set_qos",
869 sstrerror (ret, errbuf, sizeof (errbuf)));
870 dprintf ("Setting TP_TOS failed: %s\n", errbuf);
871 }
872 }
874 if (obj->fd6 != -1)
875 {
876 /* IPV6_TCLASS requires an "int". */
877 int tmp = (int) qos;
879 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
880 if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_TCLASS,
881 &tmp, sizeof (tmp)))
882 {
883 ret = errno;
884 ping_set_error (obj, "ping_set_qos",
885 sstrerror (ret, errbuf, sizeof (errbuf)));
886 dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
887 }
888 }
890 return (ret);
891 }
893 static int ping_get_ident (void)
894 {
895 int fd;
896 static int did_seed = 0;
898 int retval;
900 if (did_seed == 0)
901 {
902 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
903 {
904 unsigned int seed;
906 if (read (fd, &seed, sizeof (seed)) != -1)
907 {
908 did_seed = 1;
909 dprintf ("Random seed: %#x\n", seed);
910 srandom (seed);
911 }
913 close (fd);
914 }
915 #if WITH_DEBUG
916 else
917 {
918 char errbuf[PING_ERRMSG_LEN];
919 dprintf ("open (/dev/urandom): %s\n",
920 sstrerror (errno, errbuf, sizeof (errbuf)));
921 }
922 #endif
923 }
925 retval = (int) random ();
927 dprintf ("Random number: %#x\n", retval);
929 return (retval);
930 }
932 static pinghost_t *ping_alloc (void)
933 {
934 pinghost_t *ph;
935 size_t ph_size;
937 ph_size = sizeof (pinghost_t)
938 + sizeof (struct sockaddr_storage)
939 + sizeof (struct timeval);
941 ph = (pinghost_t *) malloc (ph_size);
942 if (ph == NULL)
943 return (NULL);
945 memset (ph, '\0', ph_size);
947 ph->timer = (struct timeval *) (ph + 1);
948 ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
950 ph->addrlen = sizeof (struct sockaddr_storage);
951 ph->latency = -1.0;
952 ph->dropped = 0;
953 ph->ident = ping_get_ident () & 0xFFFF;
955 return (ph);
956 }
958 static void ping_free (pinghost_t *ph)
959 {
960 if (ph->username != NULL)
961 free (ph->username);
963 if (ph->hostname != NULL)
964 free (ph->hostname);
966 if (ph->data != NULL)
967 free (ph->data);
969 free (ph);
970 }
972 /* ping_open_socket opens, initializes and returns a new raw socket to use for
973 * ICMPv4 or ICMPv6 packets. addrfam must be either AF_INET or AF_INET6. On
974 * error, -1 is returned and obj->errmsg is set appropriately. */
975 static int ping_open_socket(pingobj_t *obj, int addrfam)
976 {
977 int fd;
978 if (addrfam == AF_INET6)
979 {
980 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMPV6);
981 }
982 else if (addrfam == AF_INET)
983 {
984 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMP);
985 }
986 else /* this should not happen */
987 {
988 ping_set_error (obj, "ping_open_socket", "Unknown address family");
989 dprintf ("Unknown address family: %i\n", addrfam);
990 return -1;
991 }
993 if (fd == -1)
994 {
995 ping_set_errno (obj, errno);
996 #if WITH_DEBUG
997 char errbuf[PING_ERRMSG_LEN];
998 dprintf ("socket: %s\n",
999 sstrerror (errno, errbuf, sizeof (errbuf)));
1000 #endif
1001 return -1;
1002 }
1003 else if (fd >= FD_SETSIZE)
1004 {
1005 ping_set_errno (obj, EMFILE);
1006 dprintf ("socket(2) returned file descriptor %d, which is above the file "
1007 "descriptor limit for select(2) (FD_SETSIZE = %d)\n",
1008 fd, FD_SETSIZE);
1009 close (fd);
1010 return -1;
1011 }
1013 if (obj->srcaddr != NULL)
1014 {
1015 assert (obj->srcaddrlen > 0);
1016 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1018 if (bind (fd, obj->srcaddr, obj->srcaddrlen) == -1)
1019 {
1020 ping_set_errno (obj, errno);
1021 #if WITH_DEBUG
1022 char errbuf[PING_ERRMSG_LEN];
1023 dprintf ("bind: %s\n",
1024 sstrerror (errno, errbuf, sizeof (errbuf)));
1025 #endif
1026 close (fd);
1027 return -1;
1028 }
1029 }
1031 #ifdef SO_BINDTODEVICE
1032 if (obj->device != NULL)
1033 {
1034 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1035 obj->device, strlen (obj->device) + 1) != 0)
1036 {
1037 ping_set_errno (obj, errno);
1038 #if WITH_DEBUG
1039 char errbuf[PING_ERRMSG_LEN];
1040 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1041 sstrerror (errno, errbuf, sizeof (errbuf)));
1042 #endif
1043 close (fd);
1044 return -1;
1045 }
1046 }
1047 #endif /* SO_BINDTODEVICE */
1048 #ifdef SO_MARK
1049 if (obj->set_mark)
1050 {
1051 if (setsockopt(fd, SOL_SOCKET, SO_MARK,
1052 &obj->mark, sizeof(obj->mark)) != 0)
1053 {
1054 ping_set_errno (obj, errno);
1055 #if WITH_DEBUG
1056 char errbuf[PING_ERRMSG_LEN];
1057 dprintf ("setsockopt (SO_MARK): %s\n",
1058 sstrerror (errno, errbuf, sizeof (errbuf)));
1059 #endif
1060 close (fd);
1061 return -1;
1062 }
1063 }
1064 #endif
1065 #ifdef SO_TIMESTAMP
1066 if (1) /* {{{ */
1067 {
1068 int status;
1069 int opt = 1;
1071 status = setsockopt (fd,
1072 SOL_SOCKET, SO_TIMESTAMP,
1073 &opt, sizeof (opt));
1074 if (status != 0)
1075 {
1076 ping_set_errno (obj, errno);
1077 #if WITH_DEBUG
1078 char errbuf[PING_ERRMSG_LEN];
1079 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1080 sstrerror (errno, errbuf, sizeof (errbuf)));
1081 #endif
1082 close (fd);
1083 return -1;
1084 }
1085 } /* }}} if (1) */
1086 #endif /* SO_TIMESTAMP */
1088 if (addrfam == AF_INET)
1089 {
1090 int opt;
1092 #ifdef IP_RECVTOS
1093 /* Enable receiving the TOS field */
1094 opt = 1;
1095 setsockopt (fd, IPPROTO_IP, IP_RECVTOS,
1096 &opt, sizeof (opt));
1097 #endif /* IP_RECVTOS */
1099 /* Enable receiving the TTL field */
1100 opt = 1;
1101 setsockopt (fd, IPPROTO_IP, IP_RECVTTL,
1102 &opt, sizeof (opt));
1103 }
1104 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1105 else if (addrfam == AF_INET6)
1106 {
1107 int opt;
1109 # if defined(IPV6_RECVHOPLIMIT)
1110 /* For details see RFC 3542, section 6.3. */
1111 opt = 1;
1112 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1113 &opt, sizeof (opt));
1114 # endif /* IPV6_RECVHOPLIMIT */
1116 # if defined(IPV6_RECVTCLASS)
1117 /* For details see RFC 3542, section 6.5. */
1118 opt = 1;
1119 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1120 &opt, sizeof (opt));
1121 # endif /* IPV6_RECVTCLASS */
1122 }
1123 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1125 return fd;
1126 }
1128 /*
1129 * public methods
1130 */
1131 const char *ping_get_error (pingobj_t *obj)
1132 {
1133 if (obj == NULL)
1134 return (NULL);
1135 return (obj->errmsg);
1136 }
1138 pingobj_t *ping_construct (void)
1139 {
1140 pingobj_t *obj;
1142 if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1143 return (NULL);
1144 memset (obj, 0, sizeof (pingobj_t));
1146 obj->timeout = PING_DEF_TIMEOUT;
1147 obj->ttl = PING_DEF_TTL;
1148 obj->addrfamily = PING_DEF_AF;
1149 obj->data = strdup (PING_DEF_DATA);
1150 obj->qos = 0;
1151 obj->fd4 = -1;
1152 obj->fd6 = -1;
1154 return (obj);
1155 }
1157 void ping_destroy (pingobj_t *obj)
1158 {
1159 pinghost_t *current;
1160 pinghost_t *next;
1162 if (obj == NULL)
1163 return;
1165 current = obj->head;
1166 next = NULL;
1168 while (current != NULL)
1169 {
1170 next = current->next;
1171 ping_free (current);
1172 current = next;
1173 }
1175 if (obj->data != NULL)
1176 free (obj->data);
1178 if (obj->srcaddr != NULL)
1179 free (obj->srcaddr);
1181 if (obj->device != NULL)
1182 free (obj->device);
1184 if (obj->fd4 != -1)
1185 close(obj->fd4);
1187 if (obj->fd6 != -1)
1188 close(obj->fd6);
1190 free (obj);
1192 return;
1193 }
1195 int ping_setopt (pingobj_t *obj, int option, void *value)
1196 {
1197 int ret = 0;
1199 if ((obj == NULL) || (value == NULL))
1200 return (-1);
1202 switch (option)
1203 {
1204 case PING_OPT_QOS:
1205 {
1206 obj->qos = *((uint8_t *) value);
1207 ret = ping_set_qos (obj, obj->qos);
1208 break;
1209 }
1211 case PING_OPT_TIMEOUT:
1212 obj->timeout = *((double *) value);
1213 if (obj->timeout < 0.0)
1214 {
1215 obj->timeout = PING_DEF_TIMEOUT;
1216 ret = -1;
1217 }
1218 break;
1220 case PING_OPT_TTL:
1221 ret = *((int *) value);
1222 if ((ret < 1) || (ret > 255))
1223 {
1224 obj->ttl = PING_DEF_TTL;
1225 ret = -1;
1226 }
1227 else
1228 {
1229 obj->ttl = ret;
1230 ret = ping_set_ttl (obj, obj->ttl);
1231 }
1232 break;
1234 case PING_OPT_AF:
1235 obj->addrfamily = *((int *) value);
1236 if ((obj->addrfamily != AF_UNSPEC)
1237 && (obj->addrfamily != AF_INET)
1238 && (obj->addrfamily != AF_INET6))
1239 {
1240 obj->addrfamily = PING_DEF_AF;
1241 ret = -1;
1242 }
1243 if (obj->srcaddr != NULL)
1244 {
1245 free (obj->srcaddr);
1246 obj->srcaddr = NULL;
1247 }
1248 break;
1250 case PING_OPT_DATA:
1251 if (obj->data != NULL)
1252 {
1253 free (obj->data);
1254 obj->data = NULL;
1255 }
1256 obj->data = strdup ((const char *) value);
1257 break;
1259 case PING_OPT_SOURCE:
1260 {
1261 char *hostname = (char *) value;
1262 struct addrinfo ai_hints;
1263 struct addrinfo *ai_list;
1264 int status;
1265 #if WITH_DEBUG
1266 if (obj->addrfamily != AF_UNSPEC)
1267 {
1268 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1269 }
1270 #endif
1271 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1272 ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1273 #if defined(AI_ADDRCONFIG)
1274 ai_hints.ai_flags = AI_ADDRCONFIG;
1275 #endif
1276 status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1277 if (status != 0)
1278 {
1279 #if defined(EAI_SYSTEM)
1280 char errbuf[PING_ERRMSG_LEN];
1281 #endif
1282 ping_set_error (obj, "getaddrinfo",
1283 #if defined(EAI_SYSTEM)
1284 (status == EAI_SYSTEM)
1285 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1286 #endif
1287 gai_strerror (status));
1288 ret = -1;
1289 break;
1290 }
1291 #if WITH_DEBUG
1292 if (ai_list->ai_next != NULL)
1293 {
1294 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1295 }
1296 #endif
1297 if (obj->srcaddr == NULL)
1298 {
1299 obj->srcaddrlen = 0;
1300 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1301 if (obj->srcaddr == NULL)
1302 {
1303 ping_set_errno (obj, errno);
1304 ret = -1;
1305 freeaddrinfo (ai_list);
1306 break;
1307 }
1308 }
1309 memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1310 assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1311 memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1312 ai_list->ai_addrlen);
1313 obj->srcaddrlen = ai_list->ai_addrlen;
1314 obj->addrfamily = ai_list->ai_family;
1316 freeaddrinfo (ai_list);
1317 } /* case PING_OPT_SOURCE */
1318 break;
1320 case PING_OPT_DEVICE:
1321 {
1322 #ifdef SO_BINDTODEVICE
1323 char *device = strdup ((char *) value);
1325 if (device == NULL)
1326 {
1327 ping_set_errno (obj, errno);
1328 ret = -1;
1329 break;
1330 }
1332 if (obj->device != NULL)
1333 free (obj->device);
1334 obj->device = device;
1335 #else /* ! SO_BINDTODEVICE */
1336 ping_set_errno (obj, ENOTSUP);
1337 ret = -1;
1338 #endif /* ! SO_BINDTODEVICE */
1339 } /* case PING_OPT_DEVICE */
1340 break;
1342 case PING_OPT_MARK:
1343 {
1344 #ifdef SO_MARK
1345 obj->mark = *(int*)(value);
1346 obj->set_mark = 1;
1347 #else /* SO_MARK */
1348 ping_set_errno (obj, ENOTSUP);
1349 ret = -1;
1350 #endif /* !SO_MARK */
1352 } /* case PING_OPT_MARK */
1353 break;
1355 default:
1356 ret = -2;
1357 } /* switch (option) */
1359 return (ret);
1360 } /* int ping_setopt */
1362 int ping_send (pingobj_t *obj)
1363 {
1364 pinghost_t *ptr;
1366 struct timeval endtime;
1367 struct timeval nowtime;
1368 struct timeval timeout;
1370 /* pings is the number of in-flight pings, i.e. hosts we sent a "ping"
1371 * to but didn't receive a "pong" yet. */
1372 int pings = 0;
1373 int ret = 0;
1375 _Bool need_ipv4_socket = 0;
1376 _Bool need_ipv6_socket = 0;
1378 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
1379 {
1380 ptr->latency = -1.0;
1381 ptr->recv_ttl = -1;
1383 if (ptr->addrfamily == AF_INET)
1384 need_ipv4_socket = 1;
1385 else if (ptr->addrfamily == AF_INET6)
1386 need_ipv6_socket = 1;
1387 }
1389 if (!need_ipv4_socket && !need_ipv6_socket)
1390 {
1391 ping_set_error (obj, "ping_send", "No hosts to ping");
1392 return (-1);
1393 }
1395 if (need_ipv4_socket && obj->fd4 == -1)
1396 {
1397 obj->fd4 = ping_open_socket(obj, AF_INET);
1398 if (obj->fd4 == -1)
1399 return (-1);
1400 ping_set_ttl (obj, obj->ttl);
1401 ping_set_qos (obj, obj->qos);
1402 }
1403 if (need_ipv6_socket && obj->fd6 == -1)
1404 {
1405 obj->fd6 = ping_open_socket(obj, AF_INET6);
1406 if (obj->fd6 == -1)
1407 return (-1);
1408 ping_set_ttl (obj, obj->ttl);
1409 ping_set_qos (obj, obj->qos);
1410 }
1412 if (gettimeofday (&nowtime, NULL) == -1)
1413 {
1414 ping_set_errno (obj, errno);
1415 return (-1);
1416 }
1418 /* Set up timeout */
1419 timeout.tv_sec = (time_t) obj->timeout;
1420 timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
1422 dprintf ("Set timeout to %i.%06i seconds\n",
1423 (int) timeout.tv_sec,
1424 (int) timeout.tv_usec);
1426 ping_timeval_add (&nowtime, &timeout, &endtime);
1428 ptr = obj->head;
1429 while (pings > 0 || ptr != NULL)
1430 {
1431 fd_set read_fds;
1432 fd_set write_fds;
1433 fd_set err_fds;
1435 int max_fd = -1;
1437 FD_ZERO (&read_fds);
1438 FD_ZERO (&write_fds);
1439 FD_ZERO (&err_fds);
1441 if (obj->fd4 != -1)
1442 {
1443 FD_SET(obj->fd4, &read_fds);
1444 if (ptr != NULL && ptr->addrfamily == AF_INET)
1445 FD_SET(obj->fd4, &write_fds);
1446 FD_SET(obj->fd4, &err_fds);
1448 if (max_fd < obj->fd4)
1449 max_fd = obj->fd4;
1450 }
1452 if (obj->fd6 != -1)
1453 {
1454 FD_SET(obj->fd6, &read_fds);
1455 if (ptr != NULL && ptr->addrfamily == AF_INET6)
1456 FD_SET(obj->fd6, &write_fds);
1457 FD_SET(obj->fd6, &err_fds);
1459 if (max_fd < obj->fd6)
1460 max_fd = obj->fd6;
1461 }
1463 assert (max_fd != -1);
1464 assert (max_fd < FD_SETSIZE);
1466 if (gettimeofday (&nowtime, NULL) == -1)
1467 {
1468 ping_set_errno (obj, errno);
1469 return (-1);
1470 }
1472 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
1473 break;
1475 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
1476 (int) timeout.tv_sec,
1477 (int) timeout.tv_usec);
1479 int status = select (max_fd + 1, &read_fds, &write_fds, &err_fds, &timeout);
1481 if (gettimeofday (&nowtime, NULL) == -1)
1482 {
1483 ping_set_errno (obj, errno);
1484 return (-1);
1485 }
1487 if ((status == -1) && (errno == EINTR))
1488 {
1489 dprintf ("select was interrupted by signal..\n");
1490 ping_set_errno (obj, EINTR);
1491 return (-1);
1492 }
1493 else if (status < 0)
1494 {
1495 #if WITH_DEBUG
1496 char errbuf[PING_ERRMSG_LEN];
1497 dprintf ("select: %s\n",
1498 sstrerror (errno, errbuf, sizeof (errbuf)));
1499 #endif
1500 break;
1501 }
1502 else if (status == 0)
1503 {
1504 dprintf ("select timed out\n");
1505 for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
1506 if (ptr->latency < 0.0)
1507 ptr->dropped++;
1509 break;
1510 }
1512 if (obj->fd4 != -1)
1513 {
1514 if (FD_ISSET (obj->fd4, &read_fds))
1515 {
1516 if (!ping_receive_one(obj, &nowtime, AF_INET))
1517 --pings;
1518 }
1519 else if (ptr != NULL && ptr->addrfamily == AF_INET &&
1520 FD_ISSET (obj->fd4, &write_fds))
1521 {
1522 if (!ping_send_one(obj, ptr, obj->fd4))
1523 {
1524 ptr = ptr->next;
1525 ++pings;
1526 }
1527 else
1528 {
1529 --ret;
1530 }
1531 }
1533 }
1535 if (obj->fd6 != -1)
1536 {
1537 if (FD_ISSET (obj->fd6, &read_fds))
1538 {
1539 if (!ping_receive_one(obj, &nowtime, AF_INET6))
1540 --pings;
1541 }
1542 else if (ptr != NULL && ptr->addrfamily == AF_INET6 &&
1543 FD_ISSET (obj->fd6, &write_fds))
1544 {
1545 if (!ping_send_one(obj, ptr, obj->fd6))
1546 {
1547 ++pings;
1548 ptr = ptr->next;
1549 }
1550 else
1551 {
1552 --ret;
1553 }
1554 }
1555 }
1556 } /* while (1) */
1558 return (ret);
1559 } /* int ping_send */
1561 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1562 {
1563 while (ph != NULL)
1564 {
1565 if (strcasecmp (ph->username, host) == 0)
1566 break;
1568 ph = ph->next;
1569 }
1571 return (ph);
1572 }
1574 int ping_host_add (pingobj_t *obj, const char *host)
1575 {
1576 pinghost_t *ph;
1578 struct addrinfo ai_hints;
1579 struct addrinfo *ai_list, *ai_ptr;
1580 int ai_return;
1582 if ((obj == NULL) || (host == NULL))
1583 return (-1);
1585 dprintf ("host = %s\n", host);
1587 if (ping_host_search (obj->head, host) != NULL)
1588 return (0);
1590 memset (&ai_hints, '\0', sizeof (ai_hints));
1591 ai_hints.ai_flags = 0;
1592 #ifdef AI_ADDRCONFIG
1593 ai_hints.ai_flags |= AI_ADDRCONFIG;
1594 #endif
1595 #ifdef AI_CANONNAME
1596 ai_hints.ai_flags |= AI_CANONNAME;
1597 #endif
1598 ai_hints.ai_family = obj->addrfamily;
1599 ai_hints.ai_socktype = SOCK_RAW;
1601 if ((ph = ping_alloc ()) == NULL)
1602 {
1603 dprintf ("Out of memory!\n");
1604 return (-1);
1605 }
1607 if ((ph->username = strdup (host)) == NULL)
1608 {
1609 dprintf ("Out of memory!\n");
1610 ping_set_errno (obj, errno);
1611 ping_free (ph);
1612 return (-1);
1613 }
1615 if ((ph->hostname = strdup (host)) == NULL)
1616 {
1617 dprintf ("Out of memory!\n");
1618 ping_set_errno (obj, errno);
1619 ping_free (ph);
1620 return (-1);
1621 }
1623 /* obj->data is not garuanteed to be != NULL */
1624 if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1625 {
1626 dprintf ("Out of memory!\n");
1627 ping_set_errno (obj, errno);
1628 ping_free (ph);
1629 return (-1);
1630 }
1632 if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1633 {
1634 #if defined(EAI_SYSTEM)
1635 char errbuf[PING_ERRMSG_LEN];
1636 #endif
1637 dprintf ("getaddrinfo failed\n");
1638 ping_set_error (obj, "getaddrinfo",
1639 #if defined(EAI_SYSTEM)
1640 (ai_return == EAI_SYSTEM)
1641 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1642 #endif
1643 gai_strerror (ai_return));
1644 ping_free (ph);
1645 return (-1);
1646 }
1648 if (ai_list == NULL)
1649 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1651 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1652 {
1653 if (ai_ptr->ai_family == AF_INET)
1654 {
1655 ai_ptr->ai_socktype = SOCK_RAW;
1656 ai_ptr->ai_protocol = IPPROTO_ICMP;
1657 }
1658 else if (ai_ptr->ai_family == AF_INET6)
1659 {
1660 ai_ptr->ai_socktype = SOCK_RAW;
1661 ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1662 }
1663 else
1664 {
1665 char errmsg[PING_ERRMSG_LEN];
1667 snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1668 errmsg[PING_ERRMSG_LEN - 1] = '\0';
1670 dprintf ("%s", errmsg);
1671 ping_set_error (obj, "getaddrinfo", errmsg);
1672 continue;
1673 }
1675 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1676 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1677 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1678 ph->addrlen = ai_ptr->ai_addrlen;
1679 ph->addrfamily = ai_ptr->ai_family;
1681 #ifdef AI_CANONNAME
1682 if ((ai_ptr->ai_canonname != NULL)
1683 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1684 {
1685 char *old_hostname;
1687 dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1688 ph->hostname, ai_ptr->ai_canonname);
1690 old_hostname = ph->hostname;
1691 if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1692 {
1693 /* strdup failed, falling back to old hostname */
1694 ph->hostname = old_hostname;
1695 }
1696 else if (old_hostname != NULL)
1697 {
1698 free (old_hostname);
1699 }
1700 }
1701 #endif /* AI_CANONNAME */
1702 } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1704 freeaddrinfo (ai_list);
1706 /*
1707 * Adding in the front is much easier, but then the iterator will
1708 * return the host that was added last as first host. That's just not
1709 * nice. -octo
1710 */
1711 if (obj->head == NULL)
1712 {
1713 obj->head = ph;
1714 }
1715 else
1716 {
1717 pinghost_t *hptr;
1719 hptr = obj->head;
1720 while (hptr->next != NULL)
1721 hptr = hptr->next;
1723 assert ((hptr != NULL) && (hptr->next == NULL));
1724 hptr->next = ph;
1725 }
1727 ph->table_next = obj->table[ph->ident % PING_TABLE_LEN];
1728 obj->table[ph->ident % PING_TABLE_LEN] = ph;
1730 return (0);
1731 } /* int ping_host_add */
1733 int ping_host_remove (pingobj_t *obj, const char *host)
1734 {
1735 pinghost_t *pre, *cur, *target;
1737 if ((obj == NULL) || (host == NULL))
1738 return (-1);
1740 pre = NULL;
1741 cur = obj->head;
1743 while (cur != NULL)
1744 {
1745 if (strcasecmp (host, cur->username) == 0)
1746 break;
1748 pre = cur;
1749 cur = cur->next;
1750 }
1752 if (cur == NULL)
1753 {
1754 ping_set_error (obj, "ping_host_remove", "Host not found");
1755 return (-1);
1756 }
1758 if (pre == NULL)
1759 obj->head = cur->next;
1760 else
1761 pre->next = cur->next;
1763 target = cur;
1764 pre = NULL;
1766 cur = obj->table[target->ident % PING_TABLE_LEN];
1768 while (cur != NULL)
1769 {
1770 if (cur == target)
1771 break;
1773 pre = cur;
1774 cur = cur->table_next;
1775 }
1777 if (cur == NULL)
1778 {
1779 ping_set_error(obj, "ping_host_remove", "Host not found (T)");
1780 ping_free(target);
1781 return (-1);
1782 }
1784 if (pre == NULL)
1785 obj->table[target->ident % PING_TABLE_LEN] = cur->table_next;
1786 else
1787 pre->table_next = cur->table_next;
1789 ping_free (cur);
1791 return (0);
1792 }
1794 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1795 {
1796 if (obj == NULL)
1797 return (NULL);
1798 return ((pingobj_iter_t *) obj->head);
1799 }
1801 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1802 {
1803 if (iter == NULL)
1804 return (NULL);
1805 return ((pingobj_iter_t *) iter->next);
1806 }
1808 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1809 void *buffer, size_t *buffer_len)
1810 {
1811 int ret = EINVAL;
1813 size_t orig_buffer_len = *buffer_len;
1815 if ((iter == NULL) || (buffer_len == NULL))
1816 return (-1);
1818 if ((buffer == NULL) && (*buffer_len != 0 ))
1819 return (-1);
1821 switch (info)
1822 {
1823 case PING_INFO_USERNAME:
1824 ret = ENOMEM;
1825 *buffer_len = strlen (iter->username) + 1;
1826 if (orig_buffer_len <= *buffer_len)
1827 break;
1828 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1829 * will copy `*buffer_len' and pad the rest of
1830 * `buffer' with null-bytes */
1831 strncpy (buffer, iter->username, orig_buffer_len);
1832 ret = 0;
1833 break;
1835 case PING_INFO_HOSTNAME:
1836 ret = ENOMEM;
1837 *buffer_len = strlen (iter->hostname) + 1;
1838 if (orig_buffer_len < *buffer_len)
1839 break;
1840 /* Since (orig_buffer_len > *buffer_len) `strncpy'
1841 * will copy `*buffer_len' and pad the rest of
1842 * `buffer' with null-bytes */
1843 strncpy (buffer, iter->hostname, orig_buffer_len);
1844 ret = 0;
1845 break;
1847 case PING_INFO_ADDRESS:
1848 ret = getnameinfo ((struct sockaddr *) iter->addr,
1849 iter->addrlen,
1850 (char *) buffer,
1851 *buffer_len,
1852 NULL, 0,
1853 NI_NUMERICHOST);
1854 if (ret != 0)
1855 {
1856 if ((ret == EAI_MEMORY)
1857 #ifdef EAI_OVERFLOW
1858 || (ret == EAI_OVERFLOW)
1859 #endif
1860 )
1861 ret = ENOMEM;
1862 #if defined(EAI_SYSTEM)
1863 else if (ret == EAI_SYSTEM)
1864 ret = errno;
1865 #endif
1866 else
1867 ret = EINVAL;
1868 }
1869 break;
1871 case PING_INFO_FAMILY:
1872 ret = ENOMEM;
1873 *buffer_len = sizeof (int);
1874 if (orig_buffer_len < sizeof (int))
1875 break;
1876 *((int *) buffer) = iter->addrfamily;
1877 ret = 0;
1878 break;
1880 case PING_INFO_LATENCY:
1881 ret = ENOMEM;
1882 *buffer_len = sizeof (double);
1883 if (orig_buffer_len < sizeof (double))
1884 break;
1885 *((double *) buffer) = iter->latency;
1886 ret = 0;
1887 break;
1889 case PING_INFO_DROPPED:
1890 ret = ENOMEM;
1891 *buffer_len = sizeof (uint32_t);
1892 if (orig_buffer_len < sizeof (uint32_t))
1893 break;
1894 *((uint32_t *) buffer) = iter->dropped;
1895 ret = 0;
1896 break;
1898 case PING_INFO_SEQUENCE:
1899 ret = ENOMEM;
1900 *buffer_len = sizeof (unsigned int);
1901 if (orig_buffer_len < sizeof (unsigned int))
1902 break;
1903 *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1904 ret = 0;
1905 break;
1907 case PING_INFO_IDENT:
1908 ret = ENOMEM;
1909 *buffer_len = sizeof (uint16_t);
1910 if (orig_buffer_len < sizeof (uint16_t))
1911 break;
1912 *((uint16_t *) buffer) = (uint16_t) iter->ident;
1913 ret = 0;
1914 break;
1916 case PING_INFO_DATA:
1917 ret = ENOMEM;
1918 *buffer_len = strlen (iter->data);
1919 if (orig_buffer_len < *buffer_len)
1920 break;
1921 strncpy ((char *) buffer, iter->data, orig_buffer_len);
1922 ret = 0;
1923 break;
1925 case PING_INFO_RECV_TTL:
1926 ret = ENOMEM;
1927 *buffer_len = sizeof (int);
1928 if (orig_buffer_len < sizeof (int))
1929 break;
1930 *((int *) buffer) = iter->recv_ttl;
1931 ret = 0;
1932 break;
1934 case PING_INFO_RECV_QOS:
1935 ret = ENOMEM;
1936 if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1937 if (!*buffer_len) *buffer_len=1;
1938 if (orig_buffer_len < *buffer_len)
1939 break;
1940 memcpy(buffer,&iter->recv_qos,*buffer_len);
1941 ret = 0;
1942 break;
1943 }
1945 return (ret);
1946 } /* ping_iterator_get_info */
1948 void *ping_iterator_get_context (pingobj_iter_t *iter)
1949 {
1950 if (iter == NULL)
1951 return (NULL);
1952 return (iter->context);
1953 }
1955 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1956 {
1957 if (iter == NULL)
1958 return;
1959 iter->context = context;
1960 }