Code

src/liboping.c: Improve coding style.
[liboping.git] / src / liboping.c
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
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
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)
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)
206         snprintf (obj->errmsg, sizeof (obj->errmsg),
207                         "%s: %s", function, message);
208         obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
211 static void ping_set_errno (pingobj_t *obj, int error_number)
213         sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
216 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
217                 struct timeval *res)
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);
231 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
232                 struct timeval *res)
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);
253 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
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);
278 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
279                 size_t buffer_len)
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);
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)
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);
454 static int ping_receive_one (pingobj_t *obj, struct timeval *now, int addrfam)
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);
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)
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);
677 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph, int fd)
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);
721 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph, int fd)
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);
765 static int ping_send_one (pingobj_t *obj, pinghost_t *ptr, int fd)
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);
814 /*
815  * Set the TTL of a socket protocol independently.
816  */
817 static int ping_set_ttl (pingobj_t *obj, int ttl)
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);
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)
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);
893 static int ping_get_ident (void)
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);
932 static pinghost_t *ping_alloc (void)
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);
958 static void ping_free (pinghost_t *ph)
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);
972 static int ping_open_socket(pingobj_t *obj, int addrfam)
974         int fd;
975         if (addrfam == AF_INET6)
976         {
977                 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMPV6);
978         }
979         else if (addrfam == AF_INET)
980         {
981                 fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMP);
982         }
983         else /* this should not happen */
984         {
985                 dprintf ("Unknown address family: %i\n", addrfam);
986                 return (-1);
987         }
989         if (fd == -1)
990         {
991 #if WITH_DEBUG
992                 char errbuf[PING_ERRMSG_LEN];
993                 dprintf ("socket: %s\n",
994                                 sstrerror (errno, errbuf, sizeof (errbuf)));
995 #endif
996                 ping_set_errno (obj, errno);
997                 return -1;
998         }
999         else if (fd >= FD_SETSIZE)
1000         {
1001                 dprintf ("socket(2) returned file descriptor %d, which is above the file "
1002                          "descriptor limit for select(2) (FD_SETSIZE = %d)\n",
1003                          fd, FD_SETSIZE);
1004                 close (fd);
1005                 ping_set_errno (obj, EMFILE);
1006                 return -1;
1007         }
1009         if (obj->srcaddr != NULL)
1010         {
1011                 assert (obj->srcaddrlen > 0);
1012                 assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1014                 if (bind (fd, obj->srcaddr, obj->srcaddrlen) == -1)
1015                 {
1016 #if WITH_DEBUG
1017                         char errbuf[PING_ERRMSG_LEN];
1018                         dprintf ("bind: %s\n",
1019                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1020 #endif
1021                         ping_set_errno (obj, errno);
1022                         close (fd);
1023                         return -1;
1024                 }
1025         }
1027 #ifdef SO_BINDTODEVICE
1028         if (obj->device != NULL)
1029         {
1030                 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1031                                 obj->device, strlen (obj->device) + 1) != 0)
1032                 {
1033 #if WITH_DEBUG
1034                         char errbuf[PING_ERRMSG_LEN];
1035                         dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1036                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1037 #endif
1038                         ping_set_errno (obj, errno);
1039                         close (fd);
1040                         return -1;
1041                 }
1042         }
1043 #endif /* SO_BINDTODEVICE */
1044 #ifdef SO_MARK
1045         if (obj->set_mark)
1046         {
1047                 if (setsockopt(fd, SOL_SOCKET, SO_MARK,
1048                                 &obj->mark, sizeof(obj->mark)) != 0)
1049                 {
1050                         ping_set_errno (obj, errno);
1051 #if WITH_DEBUG
1052                         char errbuf[PING_ERRMSG_LEN];
1053                         dprintf ("setsockopt (SO_MARK): %s\n",
1054                                  sstrerror (errno, errbuf, sizeof (errbuf)));
1055 #endif
1056                         close (fd);
1057                         return -1;
1058                 }
1059         }
1060 #endif
1061 #ifdef SO_TIMESTAMP
1062         if (1) /* {{{ */
1063         {
1064                 int status;
1065                 int opt = 1;
1067                 status = setsockopt (fd,
1068                                 SOL_SOCKET, SO_TIMESTAMP,
1069                                 &opt, sizeof (opt));
1070                 if (status != 0)
1071                 {
1072 #if WITH_DEBUG
1073                         char errbuf[PING_ERRMSG_LEN];
1074                         dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1075                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1076 #endif
1077                         ping_set_errno (obj, errno);
1078                         close (fd);
1079                         return -1;
1080                 }
1081         } /* }}} if (1) */
1082 #endif /* SO_TIMESTAMP */
1084         if (addrfam == AF_INET)
1085         {
1086                 int opt;
1088 #ifdef IP_RECVTOS
1089                 /* Enable receiving the TOS field */
1090                 opt = 1;
1091                 setsockopt (fd, IPPROTO_IP, IP_RECVTOS,
1092                                 &opt, sizeof (opt));
1093 #endif /* IP_RECVTOS */
1095                 /* Enable receiving the TTL field */
1096                 opt = 1;
1097                 setsockopt (fd, IPPROTO_IP, IP_RECVTTL,
1098                                 &opt, sizeof (opt));
1099         }
1100 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1101         else if (addrfam == AF_INET6)
1102         {
1103                 int opt;
1105 # if defined(IPV6_RECVHOPLIMIT)
1106                 /* For details see RFC 3542, section 6.3. */
1107                 opt = 1;
1108                 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1109                                 &opt, sizeof (opt));
1110 # endif /* IPV6_RECVHOPLIMIT */
1112 # if defined(IPV6_RECVTCLASS)
1113                 /* For details see RFC 3542, section 6.5. */
1114                 opt = 1;
1115                 setsockopt (fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1116                                 &opt, sizeof (opt));
1117 # endif /* IPV6_RECVTCLASS */
1118         }
1119 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1121         return fd;
1124 /*
1125  * public methods
1126  */
1127 const char *ping_get_error (pingobj_t *obj)
1129         if (obj == NULL)
1130                 return (NULL);
1131         return (obj->errmsg);
1134 pingobj_t *ping_construct (void)
1136         pingobj_t *obj;
1138         if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1139                 return (NULL);
1140         memset (obj, 0, sizeof (pingobj_t));
1142         obj->timeout    = PING_DEF_TIMEOUT;
1143         obj->ttl        = PING_DEF_TTL;
1144         obj->addrfamily = PING_DEF_AF;
1145         obj->data       = strdup (PING_DEF_DATA);
1146         obj->qos        = 0;
1147         obj->fd4        = -1;
1148         obj->fd6        = -1;
1150         return (obj);
1153 void ping_destroy (pingobj_t *obj)
1155         pinghost_t *current;
1156         pinghost_t *next;
1158         if (obj == NULL)
1159                 return;
1161         current = obj->head;
1162         next = NULL;
1164         while (current != NULL)
1165         {
1166                 next = current->next;
1167                 ping_free (current);
1168                 current = next;
1169         }
1171         if (obj->data != NULL)
1172                 free (obj->data);
1174         if (obj->srcaddr != NULL)
1175                 free (obj->srcaddr);
1177         if (obj->device != NULL)
1178                 free (obj->device);
1180         if (obj->fd4 != -1)
1181                 close(obj->fd4);
1183         if (obj->fd6 != -1)
1184                 close(obj->fd6);
1186         free (obj);
1188         return;
1191 int ping_setopt (pingobj_t *obj, int option, void *value)
1193         int ret = 0;
1195         if ((obj == NULL) || (value == NULL))
1196                 return (-1);
1198         switch (option)
1199         {
1200                 case PING_OPT_QOS:
1201                 {
1202                         obj->qos = *((uint8_t *) value);
1203                         ret = ping_set_qos (obj, obj->qos);
1204                         break;
1205                 }
1207                 case PING_OPT_TIMEOUT:
1208                         obj->timeout = *((double *) value);
1209                         if (obj->timeout < 0.0)
1210                         {
1211                                 obj->timeout = PING_DEF_TIMEOUT;
1212                                 ret = -1;
1213                         }
1214                         break;
1216                 case PING_OPT_TTL:
1217                         ret = *((int *) value);
1218                         if ((ret < 1) || (ret > 255))
1219                         {
1220                                 obj->ttl = PING_DEF_TTL;
1221                                 ret = -1;
1222                         }
1223                         else
1224                         {
1225                                 obj->ttl = ret;
1226                                 ret = ping_set_ttl (obj, obj->ttl);
1227                         }
1228                         break;
1230                 case PING_OPT_AF:
1231                         obj->addrfamily = *((int *) value);
1232                         if ((obj->addrfamily != AF_UNSPEC)
1233                                         && (obj->addrfamily != AF_INET)
1234                                         && (obj->addrfamily != AF_INET6))
1235                         {
1236                                 obj->addrfamily = PING_DEF_AF;
1237                                 ret = -1;
1238                         }
1239                         if (obj->srcaddr != NULL)
1240                         {
1241                                 free (obj->srcaddr);
1242                                 obj->srcaddr = NULL;
1243                         }
1244                         break;
1246                 case PING_OPT_DATA:
1247                         if (obj->data != NULL)
1248                         {
1249                                 free (obj->data);
1250                                 obj->data = NULL;
1251                         }
1252                         obj->data = strdup ((const char *) value);
1253                         break;
1255                 case PING_OPT_SOURCE:
1256                 {
1257                         char            *hostname = (char *) value;
1258                         struct addrinfo  ai_hints;
1259                         struct addrinfo *ai_list;
1260                         int              status;
1261 #if WITH_DEBUG
1262                         if (obj->addrfamily != AF_UNSPEC)
1263                         {
1264                                 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1265                         }
1266 #endif
1267                         memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1268                         ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1269 #if defined(AI_ADDRCONFIG)
1270                         ai_hints.ai_flags = AI_ADDRCONFIG;
1271 #endif
1272                         status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1273                         if (status != 0)
1274                         {
1275 #if defined(EAI_SYSTEM)
1276                                 char errbuf[PING_ERRMSG_LEN];
1277 #endif
1278                                 ping_set_error (obj, "getaddrinfo",
1279 #if defined(EAI_SYSTEM)
1280                                                 (status == EAI_SYSTEM)
1281                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1282 #endif
1283                                                 gai_strerror (status));
1284                                 ret = -1;
1285                                 break;
1286                         }
1287 #if WITH_DEBUG
1288                         if (ai_list->ai_next != NULL)
1289                         {
1290                                 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1291                         }
1292 #endif
1293                         if (obj->srcaddr == NULL)
1294                         {
1295                                 obj->srcaddrlen = 0;
1296                                 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1297                                 if (obj->srcaddr == NULL)
1298                                 {
1299                                         ping_set_errno (obj, errno);
1300                                         ret = -1;
1301                                         freeaddrinfo (ai_list);
1302                                         break;
1303                                 }
1304                         }
1305                         memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1306                         assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1307                         memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1308                                         ai_list->ai_addrlen);
1309                         obj->srcaddrlen = ai_list->ai_addrlen;
1310                         obj->addrfamily = ai_list->ai_family;
1312                         freeaddrinfo (ai_list);
1313                 } /* case PING_OPT_SOURCE */
1314                 break;
1316                 case PING_OPT_DEVICE:
1317                 {
1318 #ifdef SO_BINDTODEVICE
1319                         char *device = strdup ((char *) value);
1321                         if (device == NULL)
1322                         {
1323                                 ping_set_errno (obj, errno);
1324                                 ret = -1;
1325                                 break;
1326                         }
1328                         if (obj->device != NULL)
1329                                 free (obj->device);
1330                         obj->device = device;
1331 #else /* ! SO_BINDTODEVICE */
1332                         ping_set_errno (obj, ENOTSUP);
1333                         ret = -1;
1334 #endif /* ! SO_BINDTODEVICE */
1335                 } /* case PING_OPT_DEVICE */
1336                 break;
1338                 case PING_OPT_MARK:
1339                 {
1340 #ifdef SO_MARK
1341                         obj->mark     = *(int*)(value);
1342                         obj->set_mark = 1;
1343 #else /* SO_MARK */
1344                         ping_set_errno (obj, ENOTSUP);
1345                         ret = -1;
1346 #endif /* !SO_MARK */
1348                 } /* case PING_OPT_MARK */
1349                 break;
1351                 default:
1352                         ret = -2;
1353         } /* switch (option) */
1355         return (ret);
1356 } /* int ping_setopt */
1358 int ping_send (pingobj_t *obj)
1360         fd_set read_fds;
1361         fd_set write_fds;
1362         fd_set err_fds;
1364         int num_fds;
1365         int max_fd;
1367         pinghost_t *ph;
1368         pinghost_t *ptr;
1370         struct timeval endtime;
1371         struct timeval nowtime;
1372         struct timeval timeout;
1373         int status;
1375         int pings = 0;
1376         int ret = 0;
1378         ph = obj->head;
1380         int fd4 = obj->fd4;
1381         int fd6 = obj->fd6;
1383         for (ptr = ph; ptr != NULL; ptr = ptr->next)
1384         {
1385                 if (fd6 == -1 && ptr->addrfamily == AF_INET6)
1386                 {
1387                         obj->fd6 = fd6 = ping_open_socket(obj, AF_INET6);
1388                         ping_set_ttl (obj, obj->ttl);
1389                         ping_set_qos (obj, obj->qos);
1390                 }
1391                 else if (fd4 == -1 && ptr->addrfamily == AF_INET)
1392                 {
1393                         obj->fd4 = fd4 = ping_open_socket(obj, AF_INET);
1394                         ping_set_ttl (obj, obj->ttl);
1395                         ping_set_qos (obj, obj->qos);
1396                 }
1398                 if ((fd6 == -1 && ptr->addrfamily == AF_INET6)
1399                         || (fd4 == -1 && ptr->addrfamily == AF_INET))
1400                 {
1401 #if WITH_DEBUG
1402                         char errbuf[PING_ERRMSG_LEN];
1403                         dprintf ("socket: %s\n",
1404                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1405 #endif
1406                         ping_set_errno (obj, errno);
1407                         return (-1);
1408                 }
1410                 ptr->latency  = -1.0;
1411                 ptr->recv_ttl = -1;
1412         }
1414         if (fd4 == -1 && fd6 == -1)
1415         {
1416                 dprintf("No sockets to use\n");
1417                 return (-1);
1418         }
1420         if (gettimeofday (&nowtime, NULL) == -1)
1421         {
1422                 ping_set_errno (obj, errno);
1423                 return (-1);
1424         }
1426         /* Set up timeout */
1427         timeout.tv_sec = (time_t) obj->timeout;
1428         timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
1430         dprintf ("Set timeout to %i.%06i seconds\n",
1431                         (int) timeout.tv_sec,
1432                         (int) timeout.tv_usec);
1434         ping_timeval_add (&nowtime, &timeout, &endtime);
1436         ptr = ph;
1437         num_fds = 0;
1438         if (fd4 != -1)
1439                 num_fds++;
1440         if (fd6 != -1)
1441                 num_fds++;
1442         max_fd = (fd4 > fd6) ? fd4 : fd6;
1443         assert (max_fd < FD_SETSIZE);
1445         while (pings > 0 || ptr != NULL)
1446         {
1447                 FD_ZERO (&read_fds);
1448                 FD_ZERO (&write_fds);
1449                 FD_ZERO (&err_fds);
1451                 if (fd4 != -1)
1452                 {
1453                         FD_SET(fd4, &read_fds);
1454                         if (ptr != NULL && ptr->addrfamily == AF_INET)
1455                                 FD_SET(fd4, &write_fds);
1456                         FD_SET(fd4, &err_fds);
1457                 }
1459                 if (fd6 != -1)
1460                 {
1461                         FD_SET(fd6, &read_fds);
1462                         if (ptr != NULL && ptr->addrfamily == AF_INET6)
1463                                 FD_SET(fd6, &write_fds);
1464                         FD_SET(fd6, &err_fds);
1465                 }
1467                 if (gettimeofday (&nowtime, NULL) == -1)
1468                 {
1469                         ping_set_errno (obj, errno);
1470                         return (-1);
1471                 }
1473                 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
1474                         break;
1476                 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
1477                                 (int) timeout.tv_sec,
1478                                 (int) timeout.tv_usec);
1480                 status = select (max_fd + 1, &read_fds, &write_fds, &err_fds, &timeout);
1482                 if (gettimeofday (&nowtime, NULL) == -1)
1483                 {
1484                         ping_set_errno (obj, errno);
1485                         return (-1);
1486                 }
1488                 if ((status == -1) && (errno == EINTR))
1489                 {
1490                         dprintf ("select was interrupted by signal..\n");
1491                         ping_set_errno (obj, EINTR);
1492                         return (-1);
1493                 }
1494                 else if (status < 0)
1495                 {
1496 #if WITH_DEBUG
1497                         char errbuf[PING_ERRMSG_LEN];
1498                         dprintf ("select: %s\n",
1499                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1500 #endif
1501                         break;
1502                 }
1503                 else if (status == 0)
1504                 {
1505                         dprintf ("select timed out\n");
1506                         for (ptr = ph; ptr != NULL; ptr = ptr->next)
1507                                 if (ptr->latency < 0.0)
1508                                         ptr->dropped++;
1510                         break;
1511                 }
1513                 if (fd4 != -1)
1514                 {
1515                         if (FD_ISSET (fd4, &read_fds))
1516                         {
1517                                 if (!ping_receive_one(obj, &nowtime, AF_INET))
1518                                         --pings;
1519                         }
1520                         else if (ptr != NULL && ptr->addrfamily == AF_INET &&
1521                                                 FD_ISSET (fd4, &write_fds))
1522                         {
1523                                 if (!ping_send_one(obj, ptr, fd4))
1524                                 {
1525                                         ptr = ptr->next;
1526                                         ++pings;
1527                                 }
1528                                 else
1529                                 {
1530                                         --ret;
1531                                 }
1532                         }
1534                 }
1536                 if (fd6  != -1)
1537                 {
1538                         if (FD_ISSET (fd6, &read_fds))
1539                         {
1540                                 if (!ping_receive_one(obj, &nowtime, AF_INET6))
1541                                         --pings;
1542                         }
1543                         else if (ptr != NULL && ptr->addrfamily == AF_INET6 &&
1544                                                 FD_ISSET (fd6, &write_fds))
1545                         {
1546                                 if (!ping_send_one(obj, ptr, fd6))
1547                                 {
1548                                         ++pings;
1549                                         ptr = ptr->next;
1550                                 }
1551                                 else
1552                                 {
1553                                         --ret;
1554                                 }
1555                         }
1556                 }
1558         } /* while (1) */
1560         return (ret);
1561 } /* int ping_send */
1563 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1565         while (ph != NULL)
1566         {
1567                 if (strcasecmp (ph->username, host) == 0)
1568                         break;
1570                 ph = ph->next;
1571         }
1573         return (ph);
1576 int ping_host_add (pingobj_t *obj, const char *host)
1578         pinghost_t *ph;
1580         struct addrinfo  ai_hints;
1581         struct addrinfo *ai_list, *ai_ptr;
1582         int              ai_return;
1584         if ((obj == NULL) || (host == NULL))
1585                 return (-1);
1587         dprintf ("host = %s\n", host);
1589         if (ping_host_search (obj->head, host) != NULL)
1590                 return (0);
1592         memset (&ai_hints, '\0', sizeof (ai_hints));
1593         ai_hints.ai_flags     = 0;
1594 #ifdef AI_ADDRCONFIG
1595         ai_hints.ai_flags    |= AI_ADDRCONFIG;
1596 #endif
1597 #ifdef AI_CANONNAME
1598         ai_hints.ai_flags    |= AI_CANONNAME;
1599 #endif
1600         ai_hints.ai_family    = obj->addrfamily;
1601         ai_hints.ai_socktype  = SOCK_RAW;
1603         if ((ph = ping_alloc ()) == NULL)
1604         {
1605                 dprintf ("Out of memory!\n");
1606                 return (-1);
1607         }
1609         if ((ph->username = strdup (host)) == NULL)
1610         {
1611                 dprintf ("Out of memory!\n");
1612                 ping_set_errno (obj, errno);
1613                 ping_free (ph);
1614                 return (-1);
1615         }
1617         if ((ph->hostname = strdup (host)) == NULL)
1618         {
1619                 dprintf ("Out of memory!\n");
1620                 ping_set_errno (obj, errno);
1621                 ping_free (ph);
1622                 return (-1);
1623         }
1625         /* obj->data is not garuanteed to be != NULL */
1626         if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1627         {
1628                 dprintf ("Out of memory!\n");
1629                 ping_set_errno (obj, errno);
1630                 ping_free (ph);
1631                 return (-1);
1632         }
1634         if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1635         {
1636 #if defined(EAI_SYSTEM)
1637                 char errbuf[PING_ERRMSG_LEN];
1638 #endif
1639                 dprintf ("getaddrinfo failed\n");
1640                 ping_set_error (obj, "getaddrinfo",
1641 #if defined(EAI_SYSTEM)
1642                                                 (ai_return == EAI_SYSTEM)
1643                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1644 #endif
1645                                 gai_strerror (ai_return));
1646                 ping_free (ph);
1647                 return (-1);
1648         }
1650         if (ai_list == NULL)
1651                 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1653         for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1654         {
1655                 if (ai_ptr->ai_family == AF_INET)
1656                 {
1657                         ai_ptr->ai_socktype = SOCK_RAW;
1658                         ai_ptr->ai_protocol = IPPROTO_ICMP;
1659                 }
1660                 else if (ai_ptr->ai_family == AF_INET6)
1661                 {
1662                         ai_ptr->ai_socktype = SOCK_RAW;
1663                         ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1664                 }
1665                 else
1666                 {
1667                         char errmsg[PING_ERRMSG_LEN];
1669                         snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1670                         errmsg[PING_ERRMSG_LEN - 1] = '\0';
1672                         dprintf ("%s", errmsg);
1673                         ping_set_error (obj, "getaddrinfo", errmsg);
1674                         continue;
1675                 }
1677                 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1678                 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1679                 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1680                 ph->addrlen = ai_ptr->ai_addrlen;
1681                 ph->addrfamily = ai_ptr->ai_family;
1683 #ifdef AI_CANONNAME
1684                 if ((ai_ptr->ai_canonname != NULL)
1685                                 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1686                 {
1687                         char *old_hostname;
1689                         dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1690                                         ph->hostname, ai_ptr->ai_canonname);
1692                         old_hostname = ph->hostname;
1693                         if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1694                         {
1695                                 /* strdup failed, falling back to old hostname */
1696                                 ph->hostname = old_hostname;
1697                         }
1698                         else if (old_hostname != NULL)
1699                         {
1700                                 free (old_hostname);
1701                         }
1702                 }
1703 #endif /* AI_CANONNAME */
1704         } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1706         freeaddrinfo (ai_list);
1708         /*
1709          * Adding in the front is much easier, but then the iterator will
1710          * return the host that was added last as first host. That's just not
1711          * nice. -octo
1712          */
1713         if (obj->head == NULL)
1714         {
1715                 obj->head = ph;
1716         }
1717         else
1718         {
1719                 pinghost_t *hptr;
1721                 hptr = obj->head;
1722                 while (hptr->next != NULL)
1723                         hptr = hptr->next;
1725                 assert ((hptr != NULL) && (hptr->next == NULL));
1726                 hptr->next = ph;
1727         }
1729         ph->table_next = obj->table[ph->ident % PING_TABLE_LEN];
1730         obj->table[ph->ident % PING_TABLE_LEN] = ph;
1732         return (0);
1733 } /* int ping_host_add */
1735 int ping_host_remove (pingobj_t *obj, const char *host)
1737         pinghost_t *pre, *cur, *target;
1739         if ((obj == NULL) || (host == NULL))
1740                 return (-1);
1742         pre = NULL;
1743         cur = obj->head;
1745         while (cur != NULL)
1746         {
1747                 if (strcasecmp (host, cur->username) == 0)
1748                         break;
1750                 pre = cur;
1751                 cur = cur->next;
1752         }
1754         if (cur == NULL)
1755         {
1756                 ping_set_error (obj, "ping_host_remove", "Host not found");
1757                 return (-1);
1758         }
1760         if (pre == NULL)
1761                 obj->head = cur->next;
1762         else
1763                 pre->next = cur->next;
1765         target = cur;
1766         pre = NULL;
1768         cur = obj->table[target->ident % PING_TABLE_LEN];
1770         while (cur != NULL)
1771         {
1772                 if (cur == target)
1773                         break;
1775                 pre = cur;
1776                 cur = cur->table_next;
1777         }
1779         if (cur == NULL)
1780         {
1781                 ping_set_error(obj, "ping_host_remove", "Host not found (T)");
1782                 ping_free(target);
1783                 return (-1);
1784         }
1786         if (pre == NULL)
1787                 obj->table[target->ident % PING_TABLE_LEN] = cur->table_next;
1788         else
1789                 pre->table_next = cur->table_next;
1791         ping_free (cur);
1793         return (0);
1796 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1798         if (obj == NULL)
1799                 return (NULL);
1800         return ((pingobj_iter_t *) obj->head);
1803 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1805         if (iter == NULL)
1806                 return (NULL);
1807         return ((pingobj_iter_t *) iter->next);
1810 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1811                 void *buffer, size_t *buffer_len)
1813         int ret = EINVAL;
1815         size_t orig_buffer_len = *buffer_len;
1817         if ((iter == NULL) || (buffer_len == NULL))
1818                 return (-1);
1820         if ((buffer == NULL) && (*buffer_len != 0 ))
1821                 return (-1);
1823         switch (info)
1824         {
1825                 case PING_INFO_USERNAME:
1826                         ret = ENOMEM;
1827                         *buffer_len = strlen (iter->username) + 1;
1828                         if (orig_buffer_len <= *buffer_len)
1829                                 break;
1830                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1831                          * will copy `*buffer_len' and pad the rest of
1832                          * `buffer' with null-bytes */
1833                         strncpy (buffer, iter->username, orig_buffer_len);
1834                         ret = 0;
1835                         break;
1837                 case PING_INFO_HOSTNAME:
1838                         ret = ENOMEM;
1839                         *buffer_len = strlen (iter->hostname) + 1;
1840                         if (orig_buffer_len < *buffer_len)
1841                                 break;
1842                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1843                          * will copy `*buffer_len' and pad the rest of
1844                          * `buffer' with null-bytes */
1845                         strncpy (buffer, iter->hostname, orig_buffer_len);
1846                         ret = 0;
1847                         break;
1849                 case PING_INFO_ADDRESS:
1850                         ret = getnameinfo ((struct sockaddr *) iter->addr,
1851                                         iter->addrlen,
1852                                         (char *) buffer,
1853                                         *buffer_len,
1854                                         NULL, 0,
1855                                         NI_NUMERICHOST);
1856                         if (ret != 0)
1857                         {
1858                                 if ((ret == EAI_MEMORY)
1859 #ifdef EAI_OVERFLOW
1860                                                 || (ret == EAI_OVERFLOW)
1861 #endif
1862                                    )
1863                                         ret = ENOMEM;
1864 #if defined(EAI_SYSTEM)
1865                                 else if (ret == EAI_SYSTEM)
1866                                         ret = errno;
1867 #endif
1868                                 else
1869                                         ret = EINVAL;
1870                         }
1871                         break;
1873                 case PING_INFO_FAMILY:
1874                         ret = ENOMEM;
1875                         *buffer_len = sizeof (int);
1876                         if (orig_buffer_len < sizeof (int))
1877                                 break;
1878                         *((int *) buffer) = iter->addrfamily;
1879                         ret = 0;
1880                         break;
1882                 case PING_INFO_LATENCY:
1883                         ret = ENOMEM;
1884                         *buffer_len = sizeof (double);
1885                         if (orig_buffer_len < sizeof (double))
1886                                 break;
1887                         *((double *) buffer) = iter->latency;
1888                         ret = 0;
1889                         break;
1891                 case PING_INFO_DROPPED:
1892                         ret = ENOMEM;
1893                         *buffer_len = sizeof (uint32_t);
1894                         if (orig_buffer_len < sizeof (uint32_t))
1895                                 break;
1896                         *((uint32_t *) buffer) = iter->dropped;
1897                         ret = 0;
1898                         break;
1900                 case PING_INFO_SEQUENCE:
1901                         ret = ENOMEM;
1902                         *buffer_len = sizeof (unsigned int);
1903                         if (orig_buffer_len < sizeof (unsigned int))
1904                                 break;
1905                         *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1906                         ret = 0;
1907                         break;
1909                 case PING_INFO_IDENT:
1910                         ret = ENOMEM;
1911                         *buffer_len = sizeof (uint16_t);
1912                         if (orig_buffer_len < sizeof (uint16_t))
1913                                 break;
1914                         *((uint16_t *) buffer) = (uint16_t) iter->ident;
1915                         ret = 0;
1916                         break;
1918                 case PING_INFO_DATA:
1919                         ret = ENOMEM;
1920                         *buffer_len = strlen (iter->data);
1921                         if (orig_buffer_len < *buffer_len)
1922                                 break;
1923                         strncpy ((char *) buffer, iter->data, orig_buffer_len);
1924                         ret = 0;
1925                         break;
1927                 case PING_INFO_RECV_TTL:
1928                         ret = ENOMEM;
1929                         *buffer_len = sizeof (int);
1930                         if (orig_buffer_len < sizeof (int))
1931                                 break;
1932                         *((int *) buffer) = iter->recv_ttl;
1933                         ret = 0;
1934                         break;
1936                 case PING_INFO_RECV_QOS:
1937                         ret = ENOMEM;
1938                         if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1939                         if (!*buffer_len) *buffer_len=1;
1940                         if (orig_buffer_len < *buffer_len)
1941                                 break;
1942                         memcpy(buffer,&iter->recv_qos,*buffer_len);
1943                         ret = 0;
1944                         break;
1945         }
1947         return (ret);
1948 } /* ping_iterator_get_info */
1950 void *ping_iterator_get_context (pingobj_iter_t *iter)
1952         if (iter == NULL)
1953                 return (NULL);
1954         return (iter->context);
1957 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1959         if (iter == NULL)
1960                 return;
1961         iter->context = context;