Code

Created standard subversion directories.
[liboping.git] / src / liboping.c
1 /**
2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
3  * Copyright (C) 2006  Florian octo Forster <octo at verplant.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
18  */
20 #if HAVE_CONFIG_H
21 # include <config.h>
22 #endif
24 #if STDC_HEADERS
25 # include <stdlib.h>
26 # include <stdio.h>
27 # include <string.h>
28 # include <errno.h>
29 # include <assert.h>
30 #else
31 # error "You don't have the standard C99 header files installed"
32 #endif /* STDC_HEADERS */
34 #if HAVE_UNISTD_H
35 # include <unistd.h>
36 #endif
38 #ifndef __USE_BSD
39 # define __USE_BSD
40 #endif
42 #if HAVE_FCNTL_H
43 # include <fcntl.h>
44 #endif
45 #if HAVE_SYS_TYPES_H
46 # include <sys/types.h>
47 #endif
48 #if HAVE_SYS_STAT_H
49 # include <sys/stat.h>
50 #endif
52 #if TIME_WITH_SYS_TIME
53 # include <sys/time.h>
54 # include <time.h>
55 #else
56 # if HAVE_SYS_TIME_H
57 #  include <sys/time.h>
58 # else
59 #  include <time.h>
60 # endif
61 #endif
63 #if HAVE_SYS_SOCKET_H
64 # include <sys/socket.h>
65 #endif
66 #if HAVE_NETDB_H
67 # include <netdb.h>
68 #endif
70 #if HAVE_NETINET_IN_SYSTM_H
71 # include <netinet/in_systm.h>
72 #endif
73 #if HAVE_NETINET_IN_H
74 # include <netinet/in.h>
75 #endif
76 #if HAVE_NETINET_IP_H
77 # include <netinet/ip.h>
78 #endif
79 #if HAVE_NETINET_IP_ICMP_H
80 # include <netinet/ip_icmp.h>
81 #endif
82 #ifdef HAVE_NETINET_IP_VAR_H
83 # include <netinet/ip_var.h>
84 #endif
85 #if HAVE_NETINET_IP6_H
86 # include <netinet/ip6.h>
87 #endif
88 #if HAVE_NETINET_ICMP6_H
89 # include <netinet/icmp6.h>
90 #endif
92 #include "oping.h"
94 #if DEBUG
95 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
96 #else
97 # define dprintf(...) /**/
98 #endif
100 #define PING_ERRMSG_LEN 256
102 #define PING_DATA "Florian Forster <octo@verplant.org> http://verplant.org/"
104 struct pinghost
106         char                    *hostname;
107         struct sockaddr_storage *addr;
108         socklen_t                addrlen;
109         int                      addrfamily;
110         int                      fd;
111         int                      ident;
112         int                      sequence;
113         struct timeval          *timer;
114         double                   latency;
116         void                    *context;
118         struct pinghost         *next;
119 };
121 struct pingobj
123         double      timeout;
124         int         ttl;
125         int         addrfamily;
127         char        errmsg[PING_ERRMSG_LEN];
129         pinghost_t *head;
130 };
132 /*
133  * private (static) functions
134  */
135 static void ping_set_error (pingobj_t *obj, const char *function,
136                 const char *message)
138         snprintf (obj->errmsg, PING_ERRMSG_LEN, "%s: %s", function, message);
139         obj->errmsg[PING_ERRMSG_LEN - 1] = '\0';
142 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
143                 struct timeval *res)
145         res->tv_sec  = tv1->tv_sec  + tv2->tv_sec;
146         res->tv_usec = tv1->tv_usec + tv2->tv_usec;
148         while (res->tv_usec > 1000000)
149         {
150                 res->tv_usec -= 1000000;
151                 res->tv_sec++;
152         }
154         return (0);
157 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
158                 struct timeval *res)
161         if ((tv1->tv_sec < tv2->tv_sec)
162                         || ((tv1->tv_sec == tv2->tv_sec)
163                                 && (tv1->tv_usec < tv2->tv_usec)))
164                 return (-1);
166         res->tv_sec  = tv1->tv_sec  - tv2->tv_sec;
167         res->tv_usec = tv1->tv_usec - tv2->tv_usec;
169         assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec > 0)));
171         while (res->tv_usec < 0)
172         {
173                 res->tv_usec += 1000000;
174                 res->tv_sec--;
175         }
177         return (0);
180 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
182         uint32_t sum = 0;
183         uint16_t ret = 0;
185         uint16_t *ptr;
187         for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
188                 sum += *ptr;
190         if (len == 1)
191         {
192                 *(char *) &ret = *(char *) ptr;
193                 sum += ret;
194         }
196         /* Do this twice to get all possible carries.. */
197         sum = (sum >> 16) + (sum & 0xFFFF);
198         sum = (sum >> 16) + (sum & 0xFFFF);
200         ret = ~sum;
202         return (ret);
205 static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len)
207         struct ip *ip_hdr;
208         struct icmp *icmp_hdr;
210         size_t ip_hdr_len;
212         uint16_t recv_checksum;
213         uint16_t calc_checksum;
215         uint16_t ident;
216         uint16_t seq;
218         pinghost_t *ptr;
220         if (buffer_len < sizeof (struct ip))
221                 return (NULL);
223         ip_hdr     = (struct ip *) buffer;
224         ip_hdr_len = ip_hdr->ip_hl << 2;
226         if (buffer_len < ip_hdr_len)
227                 return (NULL);
229         buffer     += ip_hdr_len;
230         buffer_len -= ip_hdr_len;
232         if (buffer_len < sizeof (struct icmp))
233                 return (NULL);
235         icmp_hdr = (struct icmp *) buffer;
236         buffer     += sizeof (struct icmp);
237         buffer_len -= sizeof (struct icmp);
239         if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
240         {
241                 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
242                 return (NULL);
243         }
245         recv_checksum = icmp_hdr->icmp_cksum;
246         icmp_hdr->icmp_cksum = 0;
247         calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
248                         sizeof (struct icmp) + buffer_len);
250         if (recv_checksum != calc_checksum)
251         {
252                 dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n",
253                                 recv_checksum, calc_checksum);
254                 return (NULL);
255         }
257         ident = ntohs (icmp_hdr->icmp_id);
258         seq   = ntohs (icmp_hdr->icmp_seq);
260         for (ptr = ph; ptr != NULL; ptr = ptr->next)
261         {
262                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
263                                 ptr->hostname, ptr->ident, ptr->sequence - 1);
265                 if (ptr->addrfamily != AF_INET)
266                         continue;
268                 if (!timerisset (ptr->timer))
269                         continue;
271                 if (ptr->ident != ident)
272                         continue;
274                 if ((ptr->sequence - 1) != seq)
275                         continue;
277                 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
278                                 ptr->hostname, ident, seq);
280                 break;
281         }
283         if (ptr == NULL)
284         {
285                 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
286                                 ident, seq);
287         }
289         return (ptr);
292 static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len)
294         struct icmp6_hdr *icmp_hdr;
296         uint16_t ident;
297         uint16_t seq;
299         pinghost_t *ptr;
301         if (buffer_len < sizeof (struct icmp6_hdr))
302                 return (NULL);
304         icmp_hdr = (struct icmp6_hdr *) buffer;
305         buffer     += sizeof (struct icmp);
306         buffer_len -= sizeof (struct icmp);
308         if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
309         {
310                 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
311                 return (NULL);
312         }
314         if (icmp_hdr->icmp6_code != 0)
315         {
316                 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
317                 return (NULL);
318         }
320         ident = ntohs (icmp_hdr->icmp6_id);
321         seq   = ntohs (icmp_hdr->icmp6_seq);
323         for (ptr = ph; ptr != NULL; ptr = ptr->next)
324         {
325                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
326                                 ptr->hostname, ptr->ident, ptr->sequence - 1);
328                 if (ptr->addrfamily != AF_INET6)
329                         continue;
331                 if (!timerisset (ptr->timer))
332                         continue;
334                 if (ptr->ident != ident)
335                         continue;
337                 if ((ptr->sequence - 1) != seq)
338                         continue;
340                 dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
341                                 ptr->hostname, ident, seq);
343                 break;
344         }
346         if (ptr == NULL)
347         {
348                 dprintf ("No match found for ident = 0x%04x, seq = %i\n",
349                                 ident, seq);
350         }
352         return (ptr);
355 static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now)
357         char   buffer[4096];
358         size_t buffer_len;
360         struct timeval diff;
362         pinghost_t *host = NULL;
364         struct sockaddr_storage sa;
365         socklen_t               sa_len;
367         sa_len = sizeof (sa);
369         buffer_len = recvfrom (fd, buffer, sizeof (buffer), 0,
370                         (struct sockaddr *) &sa, &sa_len);
371         if (buffer_len == -1)
372         {
373                 dprintf ("recvfrom: %s\n", strerror (errno));
374                 return (-1);
375         }
377         dprintf ("Read %i bytes from fd = %i\n", buffer_len, fd);
379         if (sa.ss_family == AF_INET)
380         {
381                 if ((host = ping_receive_ipv4 (ph, buffer, buffer_len)) == NULL)
382                         return (-1);
383         }
384         else if (sa.ss_family == AF_INET6)
385         {
386                 if ((host = ping_receive_ipv6 (ph, buffer, buffer_len)) == NULL)
387                         return (-1);
388         }
390         dprintf ("rcvd: %12i.%06i\n",
391                         (int) now->tv_sec,
392                         (int) now->tv_usec);
393         dprintf ("sent: %12i.%06i\n",
394                         (int) host->timer->tv_sec,
395                         (int) host->timer->tv_usec);
397         if (ping_timeval_sub (now, host->timer, &diff) < 0)
398         {
399                 timerclear (host->timer);
400                 return (-1);
401         }
403         dprintf ("diff: %12i.%06i\n",
404                         (int) diff.tv_sec,
405                         (int) diff.tv_usec);
407         host->latency  = ((double) diff.tv_usec) / 1000.0;
408         host->latency += ((double) diff.tv_sec)  * 1000.0;
410         timerclear (host->timer);
412         return (0);
415 static int ping_receive_all (pingobj_t *obj)
417         fd_set readfds;
418         int num_readfds;
419         int max_readfds;
421         pinghost_t *ph;
422         pinghost_t *ptr;
424         struct timeval endtime;
425         struct timeval nowtime;
426         struct timeval timeout;
427         int status;
429         int ret;
431         ph = obj->head;
432         ret = 0;
434         for (ptr = ph; ptr != NULL; ptr = ptr->next)
435                 ptr->latency = -1.0;
437         if (gettimeofday (&nowtime, NULL) == -1)
438         {
439                 ping_set_error (obj, "gettimeofday", strerror (errno));
440                 return (-1);
441         }
443         /* Set up timeout */
444         timeout.tv_sec = (time_t) obj->timeout;
445         timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
447         dprintf ("Set timeout to %i.%06i seconds\n",
448                         (int) timeout.tv_sec,
449                         (int) timeout.tv_usec);
451         ping_timeval_add (&nowtime, &timeout, &endtime);
453         while (1)
454         {
455                 FD_ZERO (&readfds);
456                 num_readfds =  0;
457                 max_readfds = -1;
459                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
460                 {
461                         if (!timerisset (ptr->timer))
462                                 continue;
464                         FD_SET (ptr->fd, &readfds);
465                         num_readfds++;
467                         if (max_readfds < ptr->fd)
468                                 max_readfds = ptr->fd;
469                 }
471                 if (num_readfds == 0)
472                         break;
474                 if (gettimeofday (&nowtime, NULL) == -1)
475                 {
476                         ping_set_error (obj, "gettimeofday", strerror (errno));
477                         return (-1);
478                 }
480                 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
481                         break;
483                 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
484                                 (int) timeout.tv_sec,
485                                 (int) timeout.tv_usec);
487                 status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
489                 if (gettimeofday (&nowtime, NULL) == -1)
490                 {
491                         ping_set_error (obj, "gettimeofday", strerror (errno));
492                         return (-1);
493                 }
494                 
495                 if ((status == -1) && (errno == EINTR))
496                 {
497                         dprintf ("select was interrupted by signal..\n");
498                         continue;
499                 }
500                 else if (status < 0)
501                 {
502                         dprintf ("select: %s\n", strerror (errno));
503                         break;
504                 }
505                 else if (status == 0)
506                 {
507                         dprintf ("select timed out\n");
508                         break;
509                 }
511                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
512                 {
513                         if (FD_ISSET (ptr->fd, &readfds))
514                                 if (ping_receive_one (ptr->fd, ph, &nowtime) == 0)
515                                         ret++;
516                 }
517         } /* while (1) */
518         
519         return (ret);
522 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
523  * Sending functions:                                                        *
524  *                                                                           *
525  * ping_send_all                                                             *
526  * +-> ping_send_one_ipv4                                                    *
527  * `-> ping_send_one_ipv6                                                    *
528  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
529 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
530                 const void *buf, size_t buflen)
532         ssize_t ret;
534         if (gettimeofday (ph->timer, NULL) == -1)
535         {
536                 timerclear (ph->timer);
537                 return (-1);
538         }
540         ret = sendto (ph->fd, buf, buflen, 0,
541                         (struct sockaddr *) ph->addr, ph->addrlen);
543         if (ret < 0)
544                 ping_set_error (obj, "sendto", strerror (errno));
546         return (ret);
549 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
551         struct icmp *icmp4;
552         int status;
554         char buf[4096];
555         int  buflen;
557         char *data;
558         int   datalen;
560         dprintf ("ph->hostname = %s\n", ph->hostname);
562         memset (buf, '\0', sizeof (buf));
563         icmp4 = (struct icmp *) buf;
564         data  = (char *) (icmp4 + 1);
566         icmp4->icmp_type  = ICMP_ECHO;
567         icmp4->icmp_code  = 0;
568         icmp4->icmp_cksum = 0;
569         icmp4->icmp_id    = htons (ph->ident);
570         icmp4->icmp_seq   = htons (ph->sequence);
572         strcpy (data, PING_DATA);
573         datalen = strlen (data);
575         buflen = datalen + sizeof (struct icmp);
577         icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
579         dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
581         status = ping_sendto (obj, ph, buf, buflen);
582         if (status < 0)
583         {
584                 perror ("ping_sendto");
585                 return (-1);
586         }
588         dprintf ("sendto: status = %i\n", status);
590         return (0);
593 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
595         struct icmp6_hdr *icmp6;
596         int status;
598         char buf[4096];
599         int  buflen;
601         char *data;
602         int   datalen;
604         dprintf ("ph->hostname = %s\n", ph->hostname);
606         memset (buf, '\0', sizeof (buf));
607         icmp6 = (struct icmp6_hdr *) buf;
608         data  = (char *) (icmp6 + 1);
610         icmp6->icmp6_type  = ICMP6_ECHO_REQUEST;
611         icmp6->icmp6_code  = 0;
612         /* The checksum will be calculated by the TCP/IP stack.  */
613         icmp6->icmp6_cksum = 0;
614         icmp6->icmp6_id    = htons (ph->ident);
615         icmp6->icmp6_seq   = htons (ph->sequence);
617         strcpy (data, PING_DATA);
618         datalen = strlen (data);
620         buflen = datalen + sizeof (struct icmp6_hdr);
622         dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
624         status = ping_sendto (obj, ph, buf, buflen);
625         if (status < 0)
626         {
627                 perror ("ping_sendto");
628                 return (-1);
629         }
631         dprintf ("sendto: status = %i\n", status);
633         return (0);
636 static int ping_send_all (pingobj_t *obj)
638         pinghost_t *ph;
639         pinghost_t *ptr;
641         int ret;
643         ret = 0;
644         ph = obj->head;
646         for (ptr = ph; ptr != NULL; ptr = ptr->next)
647         {
648                 /* start timer.. The GNU `ping6' starts the timer before
649                  * sending the packet, so I will do that too */
650                 if (gettimeofday (ptr->timer, NULL) == -1)
651                 {
652                         dprintf ("gettimeofday: %s\n", strerror (errno));
653                         timerclear (ptr->timer);
654                         ret--;
655                         continue;
656                 }
657                 else
658                 {
659                         dprintf ("timer set for hostname = %s\n", ptr->hostname);
660                 }
662                 if (ptr->addrfamily == AF_INET6)
663                 {       
664                         dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
665                         if (ping_send_one_ipv6 (obj, ptr) != 0)
666                         {
667                                 timerclear (ptr->timer);
668                                 ret--;
669                                 continue;
670                         }
671                 }
672                 else if (ptr->addrfamily == AF_INET)
673                 {
674                         dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
675                         if (ping_send_one_ipv4 (obj, ptr) != 0)
676                         {
677                                 timerclear (ptr->timer);
678                                 ret--;
679                                 continue;
680                         }
681                 }
682                 else /* this should not happen */
683                 {
684                         dprintf ("Unknown address family: %i\n", ptr->addrfamily);
685                         timerclear (ptr->timer);
686                         ret--;
687                         continue;
688                 }
690                 ptr->sequence++;
691         }
693         return (ret);
696 /*
697  * Set the TTL of a socket protocol independently.
698  */
699 static int ping_set_ttl (pinghost_t *ph, int ttl)
701         int ret = -2;
703         if (ph->addrfamily == AF_INET)
704         {
705                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL, &ttl, sizeof (ttl));
706         }
707         else if (ph->addrfamily == AF_INET6)
708         {
709                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof (ttl));
710         }
712         return (ret);
715 static int ping_get_ident (void)
717         int fd;
718         static int did_seed = 0;
720         int retval;
722         if (did_seed == 0)
723         {
724                 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
725                 {
726                         unsigned int seed;
728                         if (read (fd, &seed, sizeof (seed)) != -1)
729                         {
730                                 did_seed = 1;
731                                 dprintf ("Random seed: %i\n", seed);
732                                 srandom (seed);
733                         }
735                         close (fd);
736                 }
737                 else
738                 {
739                         dprintf ("open (/dev/urandom): %s\n", strerror (errno));
740                 }
741         }
743         retval = (int) random ();
745         dprintf ("Random number: %i\n", retval);
746         
747         return (retval);
750 static pinghost_t *ping_alloc (void)
752         pinghost_t *ph;
753         size_t      ph_size;
755         ph_size = sizeof (pinghost_t)
756                 + sizeof (struct sockaddr_storage)
757                 + sizeof (struct timeval);
759         ph = (pinghost_t *) malloc (ph_size);
760         if (ph == NULL)
761                 return (NULL);
763         memset (ph, '\0', ph_size);
765         ph->timer   = (struct timeval *) (ph + 1);
766         ph->addr    = (struct sockaddr_storage *) (ph->timer + 1);
768         ph->addrlen = sizeof (struct sockaddr_storage);
769         ph->latency = -1.0;
770         ph->ident   = ping_get_ident () & 0xFFFF;
772         return (ph);
775 static void ping_free (pinghost_t *ph)
777         if (ph->hostname != NULL)
778                 free (ph->hostname);
780         free (ph);
783 /*
784  * public methods
785  */
786 const char *ping_get_error (pingobj_t *obj)
788         return (obj->errmsg);
791 pingobj_t *ping_construct (void)
793         pingobj_t *obj;
795         if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
796                 return (NULL);
797         memset (obj, '\0', sizeof (pingobj_t));
799         obj->timeout    = PING_DEF_TIMEOUT;
800         obj->ttl        = PING_DEF_TTL;
801         obj->addrfamily = PING_DEF_AF;
803         return (obj);
806 void ping_destroy (pingobj_t *obj)
808         pinghost_t *current;
809         pinghost_t *next;
811         current = obj->head;
812         next = NULL;
814         while (current != NULL)
815         {
816                 next = current->next;
817                 ping_free (current);
818                 current = next;
819         }
821         free (obj);
823         return;
826 int ping_setopt (pingobj_t *obj, int option, void *value)
828         int ret = 0;
830         switch (option)
831         {
832                 case PING_OPT_TIMEOUT:
833                         obj->timeout = *((double *) value);
834                         if (obj->timeout < 0.0)
835                         {
836                                 obj->timeout = PING_DEF_TIMEOUT;
837                                 ret = -1;
838                         }
839                         break;
841                 case PING_OPT_TTL:
842                         obj->ttl = *((int *) value);
843                         if ((obj->ttl < 1) || (obj->ttl > 255))
844                         {
845                                 obj->ttl = PING_DEF_TTL;
846                                 ret = -1;
847                         }
848                         break;
850                 case PING_OPT_AF:
851                         obj->addrfamily = *((int *) value);
852                         if ((obj->addrfamily != AF_UNSPEC)
853                                         && (obj->addrfamily != AF_INET)
854                                         && (obj->addrfamily != AF_INET6))
855                         {
856                                 obj->addrfamily = PING_DEF_AF;
857                                 ret = -1;
858                         }
859                         break;
861                 default:
862                         ret = -2;
863         } /* switch (option) */
865         return (ret);
866 } /* int ping_setopt */
869 int ping_send (pingobj_t *obj)
871         int ret;
873         if (ping_send_all (obj) < 0)
874                 return (-1);
876         if ((ret = ping_receive_all (obj)) < 0)
877                 return (-2);
879         return (ret);
882 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
884         while (ph != NULL)
885         {
886                 if (strcasecmp (ph->hostname, host) == 0)
887                         break;
889                 ph = ph->next;
890         }
892         return (ph);
895 int ping_host_add (pingobj_t *obj, const char *host)
897         pinghost_t *ph;
899         struct sockaddr_storage sockaddr;
900         socklen_t               sockaddr_len;
902         struct addrinfo  ai_hints;
903         struct addrinfo *ai_list, *ai_ptr;
904         int              ai_return;
906         dprintf ("host = %s\n", host);
908         if (ping_host_search (obj->head, host) != NULL)
909                 return (0);
911         memset (&ai_hints, '\0', sizeof (ai_hints));
912         ai_hints.ai_flags     = 0;
913 #ifdef AI_ADDRCONFIG
914         ai_hints.ai_flags    |= AI_ADDRCONFIG;
915 #endif
916         ai_hints.ai_family    = obj->addrfamily;
917         ai_hints.ai_socktype  = SOCK_RAW;
919         if ((ph = ping_alloc ()) == NULL)
920         {
921                 dprintf ("Out of memory!\n");
922                 return (-1);
923         }
925         if ((ph->hostname = strdup (host)) == NULL)
926         {
927                 dprintf ("Out of memory!\n");
928                 ping_set_error (obj, "strdup", strerror (errno));
929                 ping_free (ph);
930                 return (-1);
931         }
933         if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
934         {
935                 dprintf ("getaddrinfo failed\n");
936                 ping_set_error (obj, "getaddrinfo",
937                                 (ai_return == EAI_SYSTEM)
938                                 ? strerror (errno)
939                                 : gai_strerror (ai_return));
940                 ping_free (ph);
941                 return (-1);
942         }
944         if (ai_list == NULL)
945                 ping_set_error (obj, "getaddrinfo", "No hosts returned");
947         for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
948         {
949                 ph->fd = -1;
951                 sockaddr_len = sizeof (sockaddr);
952                 memset (&sockaddr, '\0', sockaddr_len);
954                 if (ai_ptr->ai_family == AF_INET)
955                 {
956                         struct sockaddr_in *si;
958                         si = (struct sockaddr_in *) &sockaddr;
959                         si->sin_family = AF_INET;
960                         si->sin_port   = htons (ph->ident);
961                         si->sin_addr.s_addr = htonl (INADDR_ANY);
963                         ai_ptr->ai_socktype = SOCK_RAW;
964                         ai_ptr->ai_protocol = IPPROTO_ICMP;
965                 }
966                 else if (ai_ptr->ai_family == AF_INET6)
967                 {
968                         struct sockaddr_in6 *si;
970                         si = (struct sockaddr_in6 *) &sockaddr;
971                         si->sin6_family = AF_INET6;
972                         si->sin6_port   = htons (ph->ident);
973                         si->sin6_addr   = in6addr_any;
975                         ai_ptr->ai_socktype = SOCK_RAW;
976                         ai_ptr->ai_protocol = IPPROTO_ICMPV6;
977                 }
978                 else
979                 {
980                         char errmsg[PING_ERRMSG_LEN];
982                         snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
983                         errmsg[PING_ERRMSG_LEN - 1] = '\0';
985                         dprintf (errmsg);
986                         ping_set_error (obj, "getaddrinfo", errmsg);
987                         continue;
988                 }
990                 /* TODO: Move this to a static function `ping_open_socket' and
991                  * call it whenever the socket dies. */
992                 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
993                 if (ph->fd == -1)
994                 {
995                         dprintf ("socket: %s\n", strerror (errno));
996                         ping_set_error (obj, "socket", strerror (errno));
997                         continue;
998                 }
1000                 if (bind (ph->fd, (struct sockaddr *) &sockaddr, sockaddr_len) == -1)
1001                 {
1002                         dprintf ("bind: %s\n", strerror (errno));
1003                         ping_set_error (obj, "bind", strerror (errno));
1004                         close (ph->fd);
1005                         ph->fd = -1;
1006                         continue;
1007                 }
1009                 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1010                 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1011                 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1012                 ph->addrlen = ai_ptr->ai_addrlen;
1013                 ph->addrfamily = ai_ptr->ai_family;
1015                 break;
1016         }
1018         freeaddrinfo (ai_list);
1020         if (ph->fd < 0)
1021         {
1022                 free (ph->hostname);
1023                 free (ph);
1024                 return (-1);
1025         }
1027         ph->next  = obj->head;
1028         obj->head = ph;
1030         ping_set_ttl (ph, obj->ttl);
1032         return (0);
1035 int ping_host_remove (pingobj_t *obj, const char *host)
1037         pinghost_t *pre, *cur;
1039         pre = NULL;
1040         cur = obj->head;
1042         while (cur != NULL)
1043         {
1044                 if (strcasecmp (host, cur->hostname))
1045                         break;
1047                 pre = cur;
1048                 cur = cur->next;
1049         }
1051         if (cur == NULL)
1052         {
1053                 ping_set_error (obj, "ping_host_remove", "Host not found");
1054                 return (-1);
1055         }
1057         if (pre == NULL)
1058                 obj->head = cur->next;
1059         else
1060                 pre->next = cur->next;
1061         
1062         if (cur->fd >= 0)
1063                 close (cur->fd);
1065         ping_free (cur);
1067         return (0);
1070 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1072         return ((pingobj_iter_t *) obj->head);
1075 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1077         return ((pingobj_iter_t *) iter->next);
1080 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1081                 void *buffer, size_t *buffer_len)
1083         int ret = EINVAL;
1085         size_t orig_buffer_len = *buffer_len;
1087         switch (info)
1088         {
1089                 case PING_INFO_HOSTNAME:
1090                         ret = ENOMEM;
1091                         *buffer_len = strlen (iter->hostname);
1092                         if (orig_buffer_len <= *buffer_len)
1093                                 break;
1094                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1095                          * will copy `*buffer_len' and pad the rest of
1096                          * `buffer' with null-bytes */
1097                         strncpy (buffer, iter->hostname, orig_buffer_len);
1098                         ret = 0;
1099                         break;
1101                 case PING_INFO_ADDRESS:
1102                         ret = getnameinfo ((struct sockaddr *) iter->addr,
1103                                         iter->addrlen,
1104                                         (char *) buffer,
1105                                         *buffer_len,
1106                                         NULL, 0,
1107                                         NI_NUMERICHOST);
1108                         if (ret != 0)
1109                         {
1110                                 if ((ret == EAI_MEMORY)
1111 #ifdef EAI_OVERFLOW
1112                                                 || (ret == EAI_OVERFLOW)
1113 #endif
1114                                    )
1115                                         ret = ENOMEM;
1116                                 else if (ret == EAI_SYSTEM)
1117                                         /* XXX: Not thread-safe! */
1118                                         ret = errno;
1119                                 else
1120                                         ret = EINVAL;
1121                         }
1122                         break;
1124                 case PING_INFO_FAMILY:
1125                         ret = ENOMEM;
1126                         *buffer_len = sizeof (int);
1127                         if (orig_buffer_len < sizeof (int))
1128                                 break;
1129                         *((int *) buffer) = iter->addrfamily;
1130                         ret = 0;
1131                         break;
1133                 case PING_INFO_LATENCY:
1134                         ret = ENOMEM;
1135                         *buffer_len = sizeof (double);
1136                         if (orig_buffer_len < sizeof (double))
1137                                 break;
1138                         *((double *) buffer) = iter->latency;
1139                         ret = 0;
1140                         break;
1142                 case PING_INFO_SEQUENCE:
1143                         ret = ENOMEM;
1144                         *buffer_len = sizeof (uint16_t);
1145                         if (orig_buffer_len < sizeof (uint16_t))
1146                                 break;
1147                         *((uint16_t *) buffer) = (uint16_t) iter->sequence;
1148                         ret = 0;
1149                         break;
1151                 case PING_INFO_IDENT:
1152                         ret = ENOMEM;
1153                         *buffer_len = sizeof (uint16_t);
1154                         if (orig_buffer_len < sizeof (uint16_t))
1155                                 break;
1156                         *((uint16_t *) buffer) = (uint16_t) iter->ident;
1157                         ret = 0;
1158                         break;
1159         }
1161         return (ret);
1164 void *ping_iterator_get_context (pingobj_iter_t *iter)
1166         return (iter->context);
1169 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1171         iter->context = context;