2 * Copyright (c) 2001 - 2003 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "krb5_locl.h"
36 #include "locate_plugin.h"
39 string_to_proto(const char *string
)
41 if(strcasecmp(string
, "udp") == 0)
42 return KRB5_KRBHST_UDP
;
43 else if(strcasecmp(string
, "tcp") == 0)
44 return KRB5_KRBHST_TCP
;
45 else if(strcasecmp(string
, "http") == 0)
46 return KRB5_KRBHST_HTTP
;
51 * set `res' and `count' to the result of looking up SRV RR in DNS for
52 * `proto', `proto', `realm' using `dns_type'.
53 * if `port' != 0, force that port number
56 static krb5_error_code
57 srv_find_realm(krb5_context context
, krb5_krbhst_info
***res
, int *count
,
58 const char *realm
, const char *dns_type
,
59 const char *proto
, const char *service
, int port
)
62 struct rk_dns_reply
*r
;
63 struct rk_resource_record
*rr
;
71 proto_num
= string_to_proto(proto
);
73 krb5_set_error_message(context
, EINVAL
,
74 N_("unknown protocol `%s' to lookup", ""),
79 if(proto_num
== KRB5_KRBHST_HTTP
)
80 def_port
= ntohs(krb5_getportbyname (context
, "http", "tcp", 80));
82 def_port
= ntohs(krb5_getportbyname (context
, service
, proto
, 88));
86 snprintf(domain
, sizeof(domain
), "_%s._%s.%s.", service
, proto
, realm
);
88 r
= rk_dns_lookup(domain
, dns_type
);
90 _krb5_debug(context
, 0,
91 "DNS lookup failed domain: %s", domain
);
92 return KRB5_KDC_UNREACH
;
95 for(num_srv
= 0, rr
= r
->head
; rr
; rr
= rr
->next
)
96 if(rr
->type
== rk_ns_t_srv
)
99 *res
= malloc(num_srv
* sizeof(**res
));
102 krb5_set_error_message(context
, ENOMEM
,
103 N_("malloc: out of memory", ""));
109 for(num_srv
= 0, rr
= r
->head
; rr
; rr
= rr
->next
)
110 if(rr
->type
== rk_ns_t_srv
) {
111 krb5_krbhst_info
*hi
;
112 size_t len
= strlen(rr
->u
.srv
->target
);
114 hi
= calloc(1, sizeof(*hi
) + len
);
117 while(--num_srv
>= 0)
118 free((*res
)[num_srv
]);
123 (*res
)[num_srv
++] = hi
;
125 hi
->proto
= proto_num
;
127 hi
->def_port
= def_port
;
131 hi
->port
= rr
->u
.srv
->port
;
133 strlcpy(hi
->hostname
, rr
->u
.srv
->target
, len
+ 1);
143 struct krb5_krbhst_data
{
147 int port
; /* hardwired port number if != 0 */
151 #define KD_SRV_HTTP 8
152 #define KD_FALLBACK 16
153 #define KD_CONFIG_EXISTS 32
154 #define KD_LARGE_MSG 64
155 #define KD_PLUGIN 128
156 krb5_error_code (*get_next
)(krb5_context
, struct krb5_krbhst_data
*,
159 unsigned int fallback_count
;
161 struct krb5_krbhst_info
*hosts
, **index
, **end
;
165 krbhst_empty(const struct krb5_krbhst_data
*kd
)
167 return kd
->index
== &kd
->hosts
;
171 * Return the default protocol for the `kd' (either TCP or UDP)
175 krbhst_get_default_proto(struct krb5_krbhst_data
*kd
)
177 if (kd
->flags
& KD_LARGE_MSG
)
178 return KRB5_KRBHST_TCP
;
179 return KRB5_KRBHST_UDP
;
187 _krb5_krbhst_get_realm(krb5_krbhst_handle handle
)
189 return handle
->realm
;
193 * parse `spec' into a krb5_krbhst_info, defaulting the port to `def_port'
194 * and forcing it to `port' if port != 0
197 static struct krb5_krbhst_info
*
198 parse_hostspec(krb5_context context
, struct krb5_krbhst_data
*kd
,
199 const char *spec
, int def_port
, int port
)
201 const char *p
= spec
, *q
;
202 struct krb5_krbhst_info
*hi
;
204 hi
= calloc(1, sizeof(*hi
) + strlen(spec
));
208 hi
->proto
= krbhst_get_default_proto(kd
);
210 if(strncmp(p
, "http://", 7) == 0){
211 hi
->proto
= KRB5_KRBHST_HTTP
;
213 } else if(strncmp(p
, "http/", 5) == 0) {
214 hi
->proto
= KRB5_KRBHST_HTTP
;
216 def_port
= ntohs(krb5_getportbyname (context
, "http", "tcp", 80));
217 }else if(strncmp(p
, "tcp/", 4) == 0){
218 hi
->proto
= KRB5_KRBHST_TCP
;
220 } else if(strncmp(p
, "udp/", 4) == 0) {
224 if (p
[0] == '[' && (q
= strchr(p
, ']')) != NULL
) {
225 /* if address looks like [foo:bar] or [foo:bar]: its a ipv6
226 adress, strip of [] */
227 memcpy(hi
->hostname
, &p
[1], q
- p
- 1);
228 hi
->hostname
[q
- p
- 1] = '\0';
233 } else if(strsep_copy(&p
, ":", hi
->hostname
, strlen(spec
) + 1) < 0) {
234 /* copy everything before : */
238 /* get rid of trailing /, and convert to lower case */
239 hi
->hostname
[strcspn(hi
->hostname
, "/")] = '\0';
240 strlwr(hi
->hostname
);
242 hi
->port
= hi
->def_port
= def_port
;
243 if(p
!= NULL
&& p
[0]) {
245 hi
->port
= strtol(p
, &end
, 0);
257 _krb5_free_krbhst_info(krb5_krbhst_info
*hi
)
260 freeaddrinfo(hi
->ai
);
265 _krb5_krbhost_info_move(krb5_context context
,
266 krb5_krbhst_info
*from
,
267 krb5_krbhst_info
**to
)
269 size_t hostnamelen
= strlen(from
->hostname
);
270 /* trailing NUL is included in structure */
271 *to
= calloc(1, sizeof(**to
) + hostnamelen
);
273 krb5_set_error_message(context
, ENOMEM
,
274 N_("malloc: out of memory", ""));
278 (*to
)->proto
= from
->proto
;
279 (*to
)->port
= from
->port
;
280 (*to
)->def_port
= from
->def_port
;
281 (*to
)->ai
= from
->ai
;
284 memcpy((*to
)->hostname
, from
->hostname
, hostnamelen
+ 1);
290 append_host_hostinfo(struct krb5_krbhst_data
*kd
, struct krb5_krbhst_info
*host
)
292 struct krb5_krbhst_info
*h
;
294 for(h
= kd
->hosts
; h
; h
= h
->next
)
295 if(h
->proto
== host
->proto
&&
296 h
->port
== host
->port
&&
297 strcmp(h
->hostname
, host
->hostname
) == 0) {
298 _krb5_free_krbhst_info(host
);
302 kd
->end
= &host
->next
;
305 static krb5_error_code
306 append_host_string(krb5_context context
, struct krb5_krbhst_data
*kd
,
307 const char *host
, int def_port
, int port
)
309 struct krb5_krbhst_info
*hi
;
311 hi
= parse_hostspec(context
, kd
, host
, def_port
, port
);
315 append_host_hostinfo(kd
, hi
);
320 * return a readable representation of `host' in `hostname, hostlen'
323 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
324 krb5_krbhst_format_string(krb5_context context
, const krb5_krbhst_info
*host
,
325 char *hostname
, size_t hostlen
)
327 const char *proto
= "";
328 char portstr
[7] = "";
329 if(host
->proto
== KRB5_KRBHST_TCP
)
331 else if(host
->proto
== KRB5_KRBHST_HTTP
)
333 if(host
->port
!= host
->def_port
)
334 snprintf(portstr
, sizeof(portstr
), ":%d", host
->port
);
335 snprintf(hostname
, hostlen
, "%s%s%s", proto
, host
->hostname
, portstr
);
340 * create a getaddrinfo `hints' based on `proto'
344 make_hints(struct addrinfo
*hints
, int proto
)
346 memset(hints
, 0, sizeof(*hints
));
347 hints
->ai_family
= AF_UNSPEC
;
349 case KRB5_KRBHST_UDP
:
350 hints
->ai_socktype
= SOCK_DGRAM
;
352 case KRB5_KRBHST_HTTP
:
353 case KRB5_KRBHST_TCP
:
354 hints
->ai_socktype
= SOCK_STREAM
;
360 * return an `struct addrinfo *' in `ai' corresponding to the information
361 * in `host'. free:ing is handled by krb5_krbhst_free.
364 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
365 krb5_krbhst_get_addrinfo(krb5_context context
, krb5_krbhst_info
*host
,
366 struct addrinfo
**ai
)
368 struct addrinfo hints
;
369 char portstr
[NI_MAXSERV
];
372 if (host
->ai
== NULL
) {
373 make_hints(&hints
, host
->proto
);
374 snprintf (portstr
, sizeof(portstr
), "%d", host
->port
);
375 ret
= getaddrinfo(host
->hostname
, portstr
, &hints
, &host
->ai
);
377 return krb5_eai_to_heim_errno(ret
, errno
);
384 get_next(struct krb5_krbhst_data
*kd
, krb5_krbhst_info
**host
)
386 struct krb5_krbhst_info
*hi
= *kd
->index
;
389 kd
->index
= &(*kd
->index
)->next
;
396 srv_get_hosts(krb5_context context
, struct krb5_krbhst_data
*kd
,
397 const char *proto
, const char *service
)
400 krb5_krbhst_info
**res
;
403 ret
= srv_find_realm(context
, &res
, &count
, kd
->realm
, "SRV", proto
, service
,
405 _krb5_debug(context
, 2, "searching DNS for realm %s %s.%s -> %d",
406 kd
->realm
, proto
, service
, ret
);
409 for(i
= 0; i
< count
; i
++)
410 append_host_hostinfo(kd
, res
[i
]);
415 * read the configuration for `conf_string', defaulting to kd->def_port and
416 * forcing it to `kd->port' if kd->port != 0
420 config_get_hosts(krb5_context context
, struct krb5_krbhst_data
*kd
,
421 const char *conf_string
)
425 hostlist
= krb5_config_get_strings(context
, NULL
,
426 "realms", kd
->realm
, conf_string
, NULL
);
428 _krb5_debug(context
, 2, "configuration file for realm %s%s found",
429 kd
->realm
, hostlist
? "" : " not");
433 kd
->flags
|= KD_CONFIG_EXISTS
;
434 for(i
= 0; hostlist
&& hostlist
[i
] != NULL
; i
++)
435 append_host_string(context
, kd
, hostlist
[i
], kd
->def_port
, kd
->port
);
437 krb5_config_free_strings(hostlist
);
441 * as a fallback, look for `serv_string.kd->realm' (typically
442 * kerberos.REALM, kerberos-1.REALM, ...
443 * `port' is the default port for the service, and `proto' the
447 static krb5_error_code
448 fallback_get_hosts(krb5_context context
, struct krb5_krbhst_data
*kd
,
449 const char *serv_string
, int port
, int proto
)
454 struct addrinfo hints
;
455 char portstr
[NI_MAXSERV
];
457 _krb5_debug(context
, 2, "fallback lookup %d for realm %s (service %s)",
458 kd
->fallback_count
, kd
->realm
, serv_string
);
461 * Don't try forever in case the DNS server keep returning us
462 * entries (like wildcard entries or the .nu TLD)
464 if(kd
->fallback_count
>= 5) {
465 kd
->flags
|= KD_FALLBACK
;
469 if(kd
->fallback_count
== 0)
470 ret
= asprintf(&host
, "%s.%s.", serv_string
, kd
->realm
);
472 ret
= asprintf(&host
, "%s-%d.%s.",
473 serv_string
, kd
->fallback_count
, kd
->realm
);
475 if (ret
< 0 || host
== NULL
)
478 make_hints(&hints
, proto
);
479 snprintf(portstr
, sizeof(portstr
), "%d", port
);
480 ret
= getaddrinfo(host
, portstr
, &hints
, &ai
);
482 /* no more hosts, so we're done here */
484 kd
->flags
|= KD_FALLBACK
;
486 struct krb5_krbhst_info
*hi
;
487 size_t hostlen
= strlen(host
);
489 hi
= calloc(1, sizeof(*hi
) + hostlen
);
496 hi
->port
= hi
->def_port
= port
;
498 memmove(hi
->hostname
, host
, hostlen
);
499 hi
->hostname
[hostlen
] = '\0';
501 append_host_hostinfo(kd
, hi
);
502 kd
->fallback_count
++;
508 * Fetch hosts from plugin
511 static krb5_error_code
512 add_locate(void *ctx
, int type
, struct sockaddr
*addr
)
514 struct krb5_krbhst_info
*hi
;
515 struct krb5_krbhst_data
*kd
= ctx
;
516 char host
[NI_MAXHOST
], port
[NI_MAXSERV
];
517 struct addrinfo hints
, *ai
;
522 socklen
= socket_sockaddr_size(addr
);
524 ret
= getnameinfo(addr
, socklen
, host
, sizeof(host
), port
, sizeof(port
),
525 NI_NUMERICHOST
|NI_NUMERICSERV
);
529 make_hints(&hints
, krbhst_get_default_proto(kd
));
530 ret
= getaddrinfo(host
, port
, &hints
, &ai
);
534 hostlen
= strlen(host
);
536 hi
= calloc(1, sizeof(*hi
) + hostlen
);
540 hi
->proto
= krbhst_get_default_proto(kd
);
541 hi
->port
= hi
->def_port
= socket_get_port(addr
);
543 memmove(hi
->hostname
, host
, hostlen
);
544 hi
->hostname
[hostlen
] = '\0';
545 append_host_hostinfo(kd
, hi
);
551 plugin_get_hosts(krb5_context context
,
552 struct krb5_krbhst_data
*kd
,
553 enum locate_service_type type
)
555 struct krb5_plugin
*list
= NULL
, *e
;
558 ret
= _krb5_plugin_find(context
, PLUGIN_TYPE_DATA
,
559 KRB5_PLUGIN_LOCATE
, &list
);
560 if(ret
!= 0 || list
== NULL
)
563 for (e
= list
; e
!= NULL
; e
= _krb5_plugin_get_next(e
)) {
564 krb5plugin_service_locate_ftable
*service
;
567 service
= _krb5_plugin_get_symbol(e
);
568 if (service
->minor_version
!= 0)
571 (*service
->init
)(context
, &ctx
);
572 ret
= (*service
->lookup
)(ctx
, type
, kd
->realm
, 0, 0, add_locate
, kd
);
573 (*service
->fini
)(ctx
);
574 if (ret
&& ret
!= KRB5_PLUGIN_NO_HANDLE
) {
575 krb5_set_error_message(context
, ret
,
576 N_("Locate plugin failed to lookup realm %s: %d", ""),
579 } else if (ret
== 0) {
580 _krb5_debug(context
, 2, "plugin found result for realm %s", kd
->realm
);
581 kd
->flags
|= KD_CONFIG_EXISTS
;
585 _krb5_plugin_free(list
);
592 static krb5_error_code
593 kdc_get_next(krb5_context context
,
594 struct krb5_krbhst_data
*kd
,
595 krb5_krbhst_info
**host
)
599 if ((kd
->flags
& KD_PLUGIN
) == 0) {
600 plugin_get_hosts(context
, kd
, locate_service_kdc
);
601 kd
->flags
|= KD_PLUGIN
;
602 if(get_next(kd
, host
))
606 if((kd
->flags
& KD_CONFIG
) == 0) {
607 config_get_hosts(context
, kd
, "kdc");
608 kd
->flags
|= KD_CONFIG
;
609 if(get_next(kd
, host
))
613 if (kd
->flags
& KD_CONFIG_EXISTS
) {
614 _krb5_debug(context
, 1,
615 "Configuration exists for realm %s, wont go to DNS",
617 return KRB5_KDC_UNREACH
;
620 if(context
->srv_lookup
) {
621 if((kd
->flags
& KD_SRV_UDP
) == 0 && (kd
->flags
& KD_LARGE_MSG
) == 0) {
622 srv_get_hosts(context
, kd
, "udp", "kerberos");
623 kd
->flags
|= KD_SRV_UDP
;
624 if(get_next(kd
, host
))
628 if((kd
->flags
& KD_SRV_TCP
) == 0) {
629 srv_get_hosts(context
, kd
, "tcp", "kerberos");
630 kd
->flags
|= KD_SRV_TCP
;
631 if(get_next(kd
, host
))
634 if((kd
->flags
& KD_SRV_HTTP
) == 0) {
635 srv_get_hosts(context
, kd
, "http", "kerberos");
636 kd
->flags
|= KD_SRV_HTTP
;
637 if(get_next(kd
, host
))
642 while((kd
->flags
& KD_FALLBACK
) == 0) {
643 ret
= fallback_get_hosts(context
, kd
, "kerberos",
645 krbhst_get_default_proto(kd
));
648 if(get_next(kd
, host
))
652 _krb5_debug(context
, 0, "No KDC entries found for %s", kd
->realm
);
654 return KRB5_KDC_UNREACH
; /* XXX */
657 static krb5_error_code
658 admin_get_next(krb5_context context
,
659 struct krb5_krbhst_data
*kd
,
660 krb5_krbhst_info
**host
)
664 if ((kd
->flags
& KD_PLUGIN
) == 0) {
665 plugin_get_hosts(context
, kd
, locate_service_kadmin
);
666 kd
->flags
|= KD_PLUGIN
;
667 if(get_next(kd
, host
))
671 if((kd
->flags
& KD_CONFIG
) == 0) {
672 config_get_hosts(context
, kd
, "admin_server");
673 kd
->flags
|= KD_CONFIG
;
674 if(get_next(kd
, host
))
678 if (kd
->flags
& KD_CONFIG_EXISTS
) {
679 _krb5_debug(context
, 1,
680 "Configuration exists for realm %s, wont go to DNS",
682 return KRB5_KDC_UNREACH
;
685 if(context
->srv_lookup
) {
686 if((kd
->flags
& KD_SRV_TCP
) == 0) {
687 srv_get_hosts(context
, kd
, "tcp", "kerberos-adm");
688 kd
->flags
|= KD_SRV_TCP
;
689 if(get_next(kd
, host
))
695 && (kd
->flags
& KD_FALLBACK
) == 0) {
696 ret
= fallback_get_hosts(context
, kd
, "kerberos",
698 krbhst_get_default_proto(kd
));
701 kd
->flags
|= KD_FALLBACK
;
702 if(get_next(kd
, host
))
706 _krb5_debug(context
, 0, "No admin entries found for realm %s", kd
->realm
);
708 return KRB5_KDC_UNREACH
; /* XXX */
711 static krb5_error_code
712 kpasswd_get_next(krb5_context context
,
713 struct krb5_krbhst_data
*kd
,
714 krb5_krbhst_info
**host
)
718 if ((kd
->flags
& KD_PLUGIN
) == 0) {
719 plugin_get_hosts(context
, kd
, locate_service_kpasswd
);
720 kd
->flags
|= KD_PLUGIN
;
721 if(get_next(kd
, host
))
725 if((kd
->flags
& KD_CONFIG
) == 0) {
726 config_get_hosts(context
, kd
, "kpasswd_server");
727 kd
->flags
|= KD_CONFIG
;
728 if(get_next(kd
, host
))
732 if (kd
->flags
& KD_CONFIG_EXISTS
) {
733 _krb5_debug(context
, 1,
734 "Configuration exists for realm %s, wont go to DNS",
736 return KRB5_KDC_UNREACH
;
739 if(context
->srv_lookup
) {
740 if((kd
->flags
& KD_SRV_UDP
) == 0) {
741 srv_get_hosts(context
, kd
, "udp", "kpasswd");
742 kd
->flags
|= KD_SRV_UDP
;
743 if(get_next(kd
, host
))
746 if((kd
->flags
& KD_SRV_TCP
) == 0) {
747 srv_get_hosts(context
, kd
, "tcp", "kpasswd");
748 kd
->flags
|= KD_SRV_TCP
;
749 if(get_next(kd
, host
))
754 /* no matches -> try admin */
756 if (krbhst_empty(kd
)) {
758 kd
->port
= kd
->def_port
;
759 kd
->get_next
= admin_get_next
;
760 ret
= (*kd
->get_next
)(context
, kd
, host
);
762 (*host
)->proto
= krbhst_get_default_proto(kd
);
766 _krb5_debug(context
, 0, "No kpasswd entries found for realm %s", kd
->realm
);
768 return KRB5_KDC_UNREACH
;
771 static krb5_error_code
772 krb524_get_next(krb5_context context
,
773 struct krb5_krbhst_data
*kd
,
774 krb5_krbhst_info
**host
)
776 if ((kd
->flags
& KD_PLUGIN
) == 0) {
777 plugin_get_hosts(context
, kd
, locate_service_krb524
);
778 kd
->flags
|= KD_PLUGIN
;
779 if(get_next(kd
, host
))
783 if((kd
->flags
& KD_CONFIG
) == 0) {
784 config_get_hosts(context
, kd
, "krb524_server");
785 if(get_next(kd
, host
))
787 kd
->flags
|= KD_CONFIG
;
790 if (kd
->flags
& KD_CONFIG_EXISTS
) {
791 _krb5_debug(context
, 1,
792 "Configuration exists for realm %s, wont go to DNS",
794 return KRB5_KDC_UNREACH
;
797 if(context
->srv_lookup
) {
798 if((kd
->flags
& KD_SRV_UDP
) == 0) {
799 srv_get_hosts(context
, kd
, "udp", "krb524");
800 kd
->flags
|= KD_SRV_UDP
;
801 if(get_next(kd
, host
))
805 if((kd
->flags
& KD_SRV_TCP
) == 0) {
806 srv_get_hosts(context
, kd
, "tcp", "krb524");
807 kd
->flags
|= KD_SRV_TCP
;
808 if(get_next(kd
, host
))
813 /* no matches -> try kdc */
815 if (krbhst_empty(kd
)) {
817 kd
->port
= kd
->def_port
;
818 kd
->get_next
= kdc_get_next
;
819 return (*kd
->get_next
)(context
, kd
, host
);
822 _krb5_debug(context
, 0, "No kpasswd entries found for realm %s", kd
->realm
);
824 return KRB5_KDC_UNREACH
;
827 static struct krb5_krbhst_data
*
828 common_init(krb5_context context
,
833 struct krb5_krbhst_data
*kd
;
835 if((kd
= calloc(1, sizeof(*kd
))) == NULL
)
838 if((kd
->realm
= strdup(realm
)) == NULL
) {
843 _krb5_debug(context
, 2, "Trying to find service %s for realm %s flags %x",
844 service
, realm
, flags
);
846 /* For 'realms' without a . do not even think of going to DNS */
847 if (!strchr(realm
, '.'))
848 kd
->flags
|= KD_CONFIG_EXISTS
;
850 if (flags
& KRB5_KRBHST_FLAGS_LARGE_MSG
)
851 kd
->flags
|= KD_LARGE_MSG
;
852 kd
->end
= kd
->index
= &kd
->hosts
;
857 * initialize `handle' to look for hosts of type `type' in realm `realm'
860 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
861 krb5_krbhst_init(krb5_context context
,
864 krb5_krbhst_handle
*handle
)
866 return krb5_krbhst_init_flags(context
, realm
, type
, 0, handle
);
869 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
870 krb5_krbhst_init_flags(krb5_context context
,
874 krb5_krbhst_handle
*handle
)
876 struct krb5_krbhst_data
*kd
;
877 krb5_error_code (*next
)(krb5_context
, struct krb5_krbhst_data
*,
878 krb5_krbhst_info
**);
883 case KRB5_KRBHST_KDC
:
885 def_port
= ntohs(krb5_getportbyname (context
, "kerberos", "udp", 88));
888 case KRB5_KRBHST_ADMIN
:
889 next
= admin_get_next
;
890 def_port
= ntohs(krb5_getportbyname (context
, "kerberos-adm",
894 case KRB5_KRBHST_CHANGEPW
:
895 next
= kpasswd_get_next
;
896 def_port
= ntohs(krb5_getportbyname (context
, "kpasswd", "udp",
898 service
= "change_password";
900 case KRB5_KRBHST_KRB524
:
901 next
= krb524_get_next
;
902 def_port
= ntohs(krb5_getportbyname (context
, "krb524", "udp", 4444));
906 krb5_set_error_message(context
, ENOTTY
,
907 N_("unknown krbhst type (%u)", ""), type
);
910 if((kd
= common_init(context
, service
, realm
, flags
)) == NULL
)
913 kd
->def_port
= def_port
;
919 * return the next host information from `handle' in `host'
922 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
923 krb5_krbhst_next(krb5_context context
,
924 krb5_krbhst_handle handle
,
925 krb5_krbhst_info
**host
)
927 if(get_next(handle
, host
))
930 return (*handle
->get_next
)(context
, handle
, host
);
934 * return the next host information from `handle' as a host name
935 * in `hostname' (or length `hostlen)
938 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
939 krb5_krbhst_next_as_string(krb5_context context
,
940 krb5_krbhst_handle handle
,
945 krb5_krbhst_info
*host
;
946 ret
= krb5_krbhst_next(context
, handle
, &host
);
949 return krb5_krbhst_format_string(context
, host
, hostname
, hostlen
);
953 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
954 krb5_krbhst_reset(krb5_context context
, krb5_krbhst_handle handle
)
956 handle
->index
= &handle
->hosts
;
959 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
960 krb5_krbhst_free(krb5_context context
, krb5_krbhst_handle handle
)
962 krb5_krbhst_info
*h
, *next
;
967 for (h
= handle
->hosts
; h
!= NULL
; h
= next
) {
969 _krb5_free_krbhst_info(h
);
976 /* backwards compatibility ahead */
978 static krb5_error_code
979 gethostlist(krb5_context context
, const char *realm
,
980 unsigned int type
, char ***hostlist
)
984 krb5_krbhst_handle handle
;
985 char host
[MAXHOSTNAMELEN
];
986 krb5_krbhst_info
*hostinfo
;
988 ret
= krb5_krbhst_init(context
, realm
, type
, &handle
);
992 while(krb5_krbhst_next(context
, handle
, &hostinfo
) == 0)
995 krb5_set_error_message(context
, KRB5_KDC_UNREACH
,
996 N_("No KDC found for realm %s", ""), realm
);
997 return KRB5_KDC_UNREACH
;
999 *hostlist
= calloc(nhost
+ 1, sizeof(**hostlist
));
1000 if(*hostlist
== NULL
) {
1001 krb5_krbhst_free(context
, handle
);
1005 krb5_krbhst_reset(context
, handle
);
1007 while(krb5_krbhst_next_as_string(context
, handle
,
1008 host
, sizeof(host
)) == 0) {
1009 if(((*hostlist
)[nhost
++] = strdup(host
)) == NULL
) {
1010 krb5_free_krbhst(context
, *hostlist
);
1011 krb5_krbhst_free(context
, handle
);
1015 (*hostlist
)[nhost
] = NULL
;
1016 krb5_krbhst_free(context
, handle
);
1021 * return an malloced list of kadmin-hosts for `realm' in `hostlist'
1024 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1025 krb5_get_krb_admin_hst (krb5_context context
,
1026 const krb5_realm
*realm
,
1029 return gethostlist(context
, *realm
, KRB5_KRBHST_ADMIN
, hostlist
);
1033 * return an malloced list of changepw-hosts for `realm' in `hostlist'
1036 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1037 krb5_get_krb_changepw_hst (krb5_context context
,
1038 const krb5_realm
*realm
,
1041 return gethostlist(context
, *realm
, KRB5_KRBHST_CHANGEPW
, hostlist
);
1045 * return an malloced list of 524-hosts for `realm' in `hostlist'
1048 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1049 krb5_get_krb524hst (krb5_context context
,
1050 const krb5_realm
*realm
,
1053 return gethostlist(context
, *realm
, KRB5_KRBHST_KRB524
, hostlist
);
1058 * return an malloced list of KDC's for `realm' in `hostlist'
1061 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1062 krb5_get_krbhst (krb5_context context
,
1063 const krb5_realm
*realm
,
1066 return gethostlist(context
, *realm
, KRB5_KRBHST_KDC
, hostlist
);
1070 * free all the memory allocated in `hostlist'
1073 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1074 krb5_free_krbhst (krb5_context context
,
1079 for (p
= hostlist
; *p
; ++p
)