+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* lib/krb5/os/locate_kdc.c
*
- * Copyright 1990,2000,2001,2002,2003,2004 Massachusetts Institute of Technology.
+ * Copyright 1990,2000,2001,2002,2003,2004,2006,2008 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
- *
+ *
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
- *
+ *
*
* get socket addresses for KDC.
*/
char * value = NULL;
int use_dns = 0;
- code = profile_get_string(context->profile, "libdefaults",
+ code = profile_get_string(context->profile, KRB5_CONF_LIBDEFAULTS,
name, 0, 0, &value);
if (value == 0 && code == 0)
- code = profile_get_string(context->profile, "libdefaults",
- "dns_fallback", 0, 0, &value);
+ code = profile_get_string(context->profile, KRB5_CONF_LIBDEFAULTS,
+ KRB5_CONF_DNS_FALLBACK, 0, 0, &value);
if (code)
return defalt;
if (value == 0)
- return defalt;
+ return defalt;
use_dns = _krb5_conf_boolean(value);
profile_release_string(value);
int
_krb5_use_dns_kdc(krb5_context context)
{
- return maybe_use_dns (context, "dns_lookup_kdc", DEFAULT_LOOKUP_KDC);
+ return maybe_use_dns (context, KRB5_CONF_DNS_LOOKUP_KDC, DEFAULT_LOOKUP_KDC);
}
int
_krb5_use_dns_realm(krb5_context context)
{
- return maybe_use_dns (context, "dns_lookup_realm", DEFAULT_LOOKUP_REALM);
+ return maybe_use_dns (context, KRB5_CONF_DNS_LOOKUP_REALM, DEFAULT_LOOKUP_REALM);
}
#endif /* KRB5_DNS_LOOKUP */
-static int get_port (const char *service, int stream, int defalt)
-{
-#if 0 /* Only used for "kerberos" and "kerberos-sec", and we want the
- right port numbers even on the OSes that botch the entries in
- /etc/services. So don't bother with the lookup, except maybe
- to produce a warning. */
- struct addrinfo hints = { 0 };
- struct addrinfo *ai;
- int err;
-
- hints.ai_family = PF_INET;
- hints.ai_socktype = stream ? SOCK_STREAM : SOCK_DGRAM;
- err = getaddrinfo (NULL, service, &hints, &ai);
- if (err == 0 && ai != 0) {
- if (ai->ai_addr->sa_family == AF_INET) {
- int port = ((struct sockaddr_in *)ai->ai_addr)->sin_port;
- freeaddrinfo (ai);
- return port;
- }
- freeaddrinfo (ai);
- }
-#endif
- /* Any error - don't complain, just use default. */
- return htons (defalt);
-}
-
int
krb5int_grow_addrlist (struct addrlist *lp, int nmore)
{
- int i;
- int newspace = lp->space + nmore;
- size_t newsize = newspace * sizeof (struct addrlist);
- struct addrinfo **newaddrs;
-
- /* NULL check a concession to SunOS4 compatibility for now; not
- required for pure ANSI support. */
- if (lp->addrs)
- newaddrs = realloc (lp->addrs, newsize);
- else
- newaddrs = malloc (newsize);
+ size_t i;
+ size_t newspace = lp->space + nmore;
+ size_t newsize = newspace * sizeof (*lp->addrs);
+ void *newaddrs;
+ newaddrs = realloc (lp->addrs, newsize);
if (newaddrs == NULL)
- return errno;
- for (i = lp->space; i < newspace; i++)
- newaddrs[i] = NULL;
+ return ENOMEM;
lp->addrs = newaddrs;
+ for (i = lp->space; i < newspace; i++) {
+ lp->addrs[i].ai = NULL;
+ lp->addrs[i].freefn = NULL;
+ lp->addrs[i].data = NULL;
+ }
lp->space = newspace;
return 0;
}
void
krb5int_free_addrlist (struct addrlist *lp)
{
- int i;
+ size_t i;
for (i = 0; i < lp->naddrs; i++)
- freeaddrinfo (lp->addrs[i]);
+ if (lp->addrs[i].freefn)
+ (lp->addrs[i].freefn)(lp->addrs[i].data);
free (lp->addrs);
lp->addrs = NULL;
lp->naddrs = lp->space = 0;
}
#define free_list krb5int_free_addrlist
-static int translate_ai_error (int err)
+static int
+translate_ai_error (int err)
{
switch (err) {
case 0:
- return 0;
+ return 0;
case EAI_BADFLAGS:
case EAI_FAMILY:
case EAI_SOCKTYPE:
case EAI_SERVICE:
- /* All of these indicate bad inputs to getaddrinfo. */
- return EINVAL;
+ /* All of these indicate bad inputs to getaddrinfo. */
+ return EINVAL;
case EAI_AGAIN:
- /* Translate to standard errno code. */
- return EAGAIN;
+ /* Translate to standard errno code. */
+ return EAGAIN;
case EAI_MEMORY:
- /* Translate to standard errno code. */
- return ENOMEM;
+ /* Translate to standard errno code. */
+ return ENOMEM;
#ifdef EAI_ADDRFAMILY
case EAI_ADDRFAMILY:
#endif
-#if EAI_NODATA != EAI_NONAME
+#if defined(EAI_NODATA) && EAI_NODATA != EAI_NONAME
case EAI_NODATA:
#endif
case EAI_NONAME:
- /* Name not known or no address data, but no error. Do
- nothing more. */
- return 0;
+ /* Name not known or no address data, but no error. Do
+ nothing more. */
+ return 0;
+#ifdef EAI_OVERFLOW
+ case EAI_OVERFLOW:
+ /* An argument buffer overflowed. */
+ return EINVAL; /* XXX */
+#endif
#ifdef EAI_SYSTEM
case EAI_SYSTEM:
- /* System error, obviously. */
- return errno;
+ /* System error, obviously. */
+ return errno;
#endif
default:
- /* An error code we haven't handled? */
- return EINVAL;
+ /* An error code we haven't handled? */
+ return EINVAL;
}
}
#include <stdarg.h>
-static inline void Tprintf(const char *fmt, ...)
+static inline void
+Tprintf(const char *fmt, ...)
{
#ifdef TEST
va_list ap;
#endif
}
-static int add_addrinfo_to_list (struct addrlist *lp, struct addrinfo *a)
+#if 0
+extern void krb5int_debug_fprint(const char *, ...);
+#define dprint krb5int_debug_fprint
+#define print_addrlist krb5int_print_addrlist
+extern void print_addrlist (const struct addrlist *a);
+#else
+static inline void dprint(const char *fmt, ...) { }
+static inline void print_addrlist(const struct addrlist *a) { }
+#endif
+
+static int
+add_addrinfo_to_list(struct addrlist *lp, struct addrinfo *a,
+ void (*freefn)(void *), void *data)
{
int err;
- switch (a->ai_socktype) {
- case SOCK_DGRAM:
- Tprintf("\tdgram\n");
- break;
- case SOCK_STREAM:
- Tprintf("\tstream\n");
- break;
- case SOCK_RAW:
- Tprintf("\traw\n");
- break;
- case 0:
- break;
- default:
- Tprintf("\tsocket type %d\n", a->ai_socktype);
- break;
- }
+ dprint("\tadding %p=%A to %p (naddrs=%d space=%d)\n", a, a, lp,
+ lp->naddrs, lp->space);
if (lp->naddrs == lp->space) {
- err = grow_list (lp, 1);
- if (err) {
- Tprintf ("grow_list failed %d\n", err);
- return err;
- }
+ err = grow_list (lp, 1);
+ if (err) {
+ Tprintf ("grow_list failed %d\n", err);
+ return err;
+ }
}
- lp->addrs[lp->naddrs++] = a;
- a->ai_next = 0;
- Tprintf ("count is now %d\n", lp->naddrs);
+ Tprintf("setting element %d\n", lp->naddrs);
+ lp->addrs[lp->naddrs].ai = a;
+ lp->addrs[lp->naddrs].freefn = freefn;
+ lp->addrs[lp->naddrs].data = data;
+ lp->naddrs++;
+ Tprintf ("\tcount is now %lu: ", (unsigned long) lp->naddrs);
+ print_addrlist(lp);
+ Tprintf("\n");
return 0;
}
#define add_host_to_list krb5int_add_host_to_list
+static void
+call_freeaddrinfo(void *data)
+{
+ /* Strict interpretation of the C standard says we can't assume
+ that the ABI for f(void*) and f(struct foo *) will be
+ compatible. Use this stub just to be paranoid. */
+ freeaddrinfo(data);
+}
+
int
krb5int_add_host_to_list (struct addrlist *lp, const char *hostname,
- int port, int secport,
- int socktype, int family)
+ int port, int secport,
+ int socktype, int family)
{
struct addrinfo *addrs, *a, *anext, hint;
- int err;
+ int err, result;
char portbuf[10], secportbuf[10];
+ void (*freefn)(void *);
Tprintf ("adding hostname %s, ports %d,%d, family %d, socktype %d\n",
- hostname, ntohs (port), ntohs (secport),
- family, socktype);
+ hostname, ntohs (port), ntohs (secport),
+ family, socktype);
memset(&hint, 0, sizeof(hint));
hint.ai_family = family;
#ifdef AI_NUMERICSERV
hint.ai_flags = AI_NUMERICSERV;
#endif
- sprintf(portbuf, "%d", ntohs(port));
- sprintf(secportbuf, "%d", ntohs(secport));
+ result = snprintf(portbuf, sizeof(portbuf), "%d", ntohs(port));
+ if (SNPRINTF_OVERFLOW(result, sizeof(portbuf)))
+ /* XXX */
+ return EINVAL;
+ result = snprintf(secportbuf, sizeof(secportbuf), "%d", ntohs(secport));
+ if (SNPRINTF_OVERFLOW(result, sizeof(secportbuf)))
+ return EINVAL;
err = getaddrinfo (hostname, portbuf, &hint, &addrs);
if (err) {
- Tprintf ("\tgetaddrinfo(\"%s\", \"%s\", ...)\n\treturns %d: %s\n",
- hostname, portbuf, err, gai_strerror (err));
- return translate_ai_error (err);
+ Tprintf ("\tgetaddrinfo(\"%s\", \"%s\", ...)\n\treturns %d: %s\n",
+ hostname, portbuf, err, gai_strerror (err));
+ return translate_ai_error (err);
}
+ freefn = call_freeaddrinfo;
anext = 0;
- for (a = addrs; a != 0 && err == 0; a = anext) {
- anext = a->ai_next;
- err = add_addrinfo_to_list (lp, a);
+ for (a = addrs; a != 0 && err == 0; a = anext, freefn = 0) {
+ anext = a->ai_next;
+ err = add_addrinfo_to_list (lp, a, freefn, a);
}
if (err || secport == 0)
- goto egress;
+ goto egress;
if (socktype == 0)
- socktype = SOCK_DGRAM;
+ socktype = SOCK_DGRAM;
else if (socktype != SOCK_DGRAM)
- goto egress;
+ goto egress;
hint.ai_family = AF_INET;
err = getaddrinfo (hostname, secportbuf, &hint, &addrs);
if (err) {
- err = translate_ai_error (err);
- goto egress;
+ err = translate_ai_error (err);
+ goto egress;
}
- for (a = addrs; a != 0 && err == 0; a = anext) {
- anext = a->ai_next;
- err = add_addrinfo_to_list (lp, a);
+ freefn = call_freeaddrinfo;
+ for (a = addrs; a != 0 && err == 0; a = anext, freefn = 0) {
+ anext = a->ai_next;
+ err = add_addrinfo_to_list (lp, a, freefn, a);
}
egress:
- if (anext)
- freeaddrinfo (anext);
+ /* XXX Memory leaks possible here if add_addrinfo_to_list fails. */
return err;
}
static krb5_error_code
krb5_locate_srv_conf_1(krb5_context context, const krb5_data *realm,
- const char * name, struct addrlist *addrlist,
- int get_masters, int socktype,
- int udpport, int sec_udpport, int family)
+ const char * name, struct addrlist *addrlist,
+ int get_masters, int socktype,
+ int udpport, int sec_udpport, int family)
{
- const char *realm_srv_names[4];
+ const char *realm_srv_names[4];
char **masterlist, **hostlist, *host, *port, *cp;
krb5_error_code code;
int i, j, count, ismaster;
Tprintf ("looking in krb5.conf for realm %s entry %s; ports %d,%d\n",
- realm->data, name, ntohs (udpport), ntohs (sec_udpport));
+ realm->data, name, ntohs (udpport), ntohs (sec_udpport));
- if ((host = malloc(realm->length + 1)) == NULL)
- return ENOMEM;
+ if ((host = malloc(realm->length + 1)) == NULL)
+ return ENOMEM;
strncpy(host, realm->data, realm->length);
host[realm->length] = '\0';
masterlist = NULL;
- realm_srv_names[0] = "realms";
+ realm_srv_names[0] = KRB5_CONF_REALMS;
realm_srv_names[1] = host;
realm_srv_names[2] = name;
realm_srv_names[3] = 0;
code = profile_get_values(context->profile, realm_srv_names, &hostlist);
if (code) {
- Tprintf ("config file lookup failed: %s\n",
- error_message(code));
+ Tprintf ("config file lookup failed: %s\n",
+ error_message(code));
if (code == PROF_NO_SECTION || code == PROF_NO_RELATION)
- code = KRB5_REALM_UNKNOWN;
- krb5_xfree(host);
- return code;
- }
+ code = KRB5_REALM_UNKNOWN;
+ free(host);
+ return code;
+ }
count = 0;
while (hostlist && hostlist[count])
- count++;
+ count++;
Tprintf ("found %d entries under 'kdc'\n", count);
-
+
if (count == 0) {
profile_free_list(hostlist);
- krb5_xfree(host);
- addrlist->naddrs = 0;
- return 0;
+ free(host);
+ addrlist->naddrs = 0;
+ return 0;
}
-
+
if (get_masters) {
- realm_srv_names[0] = "realms";
- realm_srv_names[1] = host;
- realm_srv_names[2] = "admin_server";
- realm_srv_names[3] = 0;
-
- code = profile_get_values(context->profile, realm_srv_names,
- &masterlist);
-
- krb5_xfree(host);
-
- if (code == 0) {
- for (i=0; masterlist[i]; i++) {
- host = masterlist[i];
-
- /*
- * Strip off excess whitespace
- */
- cp = strchr(host, ' ');
- if (cp)
- *cp = 0;
- cp = strchr(host, '\t');
- if (cp)
- *cp = 0;
- cp = strchr(host, ':');
- if (cp)
- *cp = 0;
- }
- }
+ realm_srv_names[0] = KRB5_CONF_REALMS;
+ realm_srv_names[1] = host;
+ realm_srv_names[2] = KRB5_CONF_ADMIN_SERVER;
+ realm_srv_names[3] = 0;
+
+ code = profile_get_values(context->profile, realm_srv_names,
+ &masterlist);
+
+ free(host);
+
+ if (code == 0) {
+ for (i=0; masterlist[i]; i++) {
+ host = masterlist[i];
+ /* Strip off excess characters. */
+ if (*host == '[' && (cp = strchr(host, ']')))
+ *(cp + 1) = '\0';
+ else
+ *(host + strcspn(host, " \t:")) = '\0';
+ }
+ }
} else {
- krb5_xfree(host);
+ free(host);
}
/* at this point, if master is non-NULL, then either the master kdc
#ifdef HAVE_NETINET_IN_H
if (sec_udpport)
- count = count * 2;
+ count = count * 2;
#endif
for (i=0; hostlist[i]; i++) {
- int p1, p2;
-
- host = hostlist[i];
- Tprintf ("entry %d is '%s'\n", i, host);
- /*
- * Strip off excess whitespace
- */
- cp = strchr(host, ' ');
- if (cp)
- *cp = 0;
- cp = strchr(host, '\t');
- if (cp)
- *cp = 0;
- port = strchr(host, ':');
- if (port) {
- *port = 0;
- port++;
- }
-
- ismaster = 0;
- if (masterlist) {
- for (j=0; masterlist[j]; j++) {
- if (strcasecmp(hostlist[i], masterlist[j]) == 0) {
- ismaster = 1;
- }
- }
- }
-
- if (get_masters && !ismaster)
- continue;
-
- if (port) {
- unsigned long l;
+ int p1, p2;
+
+ host = hostlist[i];
+ Tprintf ("entry %d is '%s'\n", i, host);
+ /* Find port number, and strip off any excess characters. */
+ if (*host == '[' && (cp = strchr(host, ']')))
+ cp = cp + 1;
+ else
+ cp = host + strcspn(host, " \t:");
+ port = (*cp == ':') ? cp + 1 : NULL;
+ *cp = '\0';
+
+ ismaster = 0;
+ if (masterlist) {
+ for (j=0; masterlist[j]; j++) {
+ if (strcasecmp(hostlist[i], masterlist[j]) == 0) {
+ ismaster = 1;
+ }
+ }
+ }
+
+ if (get_masters && !ismaster)
+ continue;
+
+ if (port) {
+ unsigned long l;
#ifdef HAVE_STROUL
- char *endptr;
- l = strtoul (port, &endptr, 10);
- if (endptr == NULL || *endptr != 0)
- return EINVAL;
+ char *endptr;
+ l = strtoul (port, &endptr, 10);
+ if (endptr == NULL || *endptr != 0)
+ return EINVAL;
#else
- l = atoi (port);
+ l = atoi (port);
#endif
- /* L is unsigned, don't need to check <0. */
- if (l > 65535)
- return EINVAL;
- p1 = htons (l);
- p2 = 0;
- } else {
- p1 = udpport;
- p2 = sec_udpport;
- }
-
- if (socktype != 0)
- code = add_host_to_list (addrlist, hostlist[i], p1, p2,
- socktype, family);
- else {
- code = add_host_to_list (addrlist, hostlist[i], p1, p2,
- SOCK_DGRAM, family);
- if (code == 0)
- code = add_host_to_list (addrlist, hostlist[i], p1, p2,
- SOCK_STREAM, family);
- }
- if (code) {
- Tprintf ("error %d (%s) returned from add_host_to_list\n", code,
- error_message (code));
- if (hostlist)
- profile_free_list (hostlist);
- if (masterlist)
- profile_free_list (masterlist);
- return code;
- }
+ /* L is unsigned, don't need to check <0. */
+ if (l > 65535)
+ return EINVAL;
+ p1 = htons (l);
+ p2 = 0;
+ } else {
+ p1 = udpport;
+ p2 = sec_udpport;
+ }
+
+ /* If the hostname was in brackets, strip those off now. */
+ if (*host == '[' && (cp = strchr(host, ']'))) {
+ host++;
+ *cp = '\0';
+ }
+
+ if (socktype != 0)
+ code = add_host_to_list(addrlist, host, p1, p2, socktype, family);
+ else {
+ code = add_host_to_list(addrlist, host, p1, p2, SOCK_DGRAM,
+ family);
+ if (code == 0)
+ code = add_host_to_list(addrlist, host, p1, p2, SOCK_STREAM,
+ family);
+ }
+ if (code) {
+ Tprintf ("error %d (%s) returned from add_host_to_list\n", code,
+ error_message (code));
+ if (hostlist)
+ profile_free_list (hostlist);
+ if (masterlist)
+ profile_free_list (masterlist);
+ return code;
+ }
}
if (hostlist)
#ifdef TEST
static krb5_error_code
krb5_locate_srv_conf(krb5_context context, const krb5_data *realm,
- const char *name, struct addrlist *al, int get_masters,
- int udpport, int sec_udpport)
+ const char *name, struct addrlist *al, int get_masters,
+ int udpport, int sec_udpport)
{
krb5_error_code ret;
ret = krb5_locate_srv_conf_1 (context, realm, name, al,
- get_masters, 0, udpport, sec_udpport, 0);
+ get_masters, 0, udpport, sec_udpport, 0);
if (ret)
- return ret;
- if (al->naddrs == 0) /* Couldn't resolve any KDC names */
- return KRB5_REALM_CANT_RESOLVE;
+ return ret;
+ if (al->naddrs == 0) /* Couldn't resolve any KDC names */
+ return KRB5_REALM_CANT_RESOLVE;
return 0;
}
#endif
#ifdef KRB5_DNS_LOOKUP
static krb5_error_code
krb5_locate_srv_dns_1 (const krb5_data *realm,
- const char *service,
- const char *protocol,
- struct addrlist *addrlist,
- int family)
+ const char *service,
+ const char *protocol,
+ struct addrlist *addrlist,
+ int family)
{
struct srv_dns_entry *head = NULL;
struct srv_dns_entry *entry = NULL, *next;
code = krb5int_make_srv_query_realm(realm, service, protocol, &head);
if (code)
- return 0;
+ return 0;
/*
* Okay! Now we've got a linked list of entries sorted by
*/
if (head == NULL)
- return 0;
+ return 0;
/* Check for the "." case indicating no support. */
if (head->next == 0 && head->host[0] == 0) {
- free(head->host);
- free(head);
- return KRB5_ERR_NO_SERVICE;
+ free(head->host);
+ free(head);
+ return KRB5_ERR_NO_SERVICE;
}
Tprintf ("walking answer list:\n");
for (entry = head; entry != NULL; entry = next) {
- Tprintf ("\tport=%d host=%s\n", entry->port, entry->host);
- next = entry->next;
- code = add_host_to_list (addrlist, entry->host, htons (entry->port), 0,
- (strcmp("_tcp", protocol)
- ? SOCK_DGRAM
- : SOCK_STREAM), family);
- if (code) {
- break;
- }
- if (entry == head) {
- free(entry->host);
- free(entry);
- head = next;
- entry = 0;
- }
+ Tprintf ("\tport=%d host=%s\n", entry->port, entry->host);
+ next = entry->next;
+ code = add_host_to_list (addrlist, entry->host, htons (entry->port), 0,
+ (strcmp("_tcp", protocol)
+ ? SOCK_DGRAM
+ : SOCK_STREAM), family);
+ if (code) {
+ break;
+ }
+ if (entry == head) {
+ free(entry->host);
+ free(entry);
+ head = next;
+ entry = 0;
+ }
}
Tprintf ("[end]\n");
}
#endif
+#include <krb5/locate_plugin.h>
+
+#if TARGET_OS_MAC
+static const char *objdirs[] = { KRB5_PLUGIN_BUNDLE_DIR, LIBDIR "/krb5/plugins/libkrb5", NULL }; /* should be a list */
+#else
+static const char *objdirs[] = { LIBDIR "/krb5/plugins/libkrb5", NULL };
+#endif
+
+struct module_callback_data {
+ int out_of_mem;
+ struct addrlist *lp;
+};
+
+static int
+module_callback (void *cbdata, int socktype, struct sockaddr *sa)
+{
+ struct module_callback_data *d = cbdata;
+ struct {
+ struct addrinfo ai;
+ union {
+ struct sockaddr_in sin;
+#ifdef KRB5_USE_INET6
+ struct sockaddr_in6 sin6;
+#endif
+ } u;
+ } *x;
+
+ if (socktype != SOCK_STREAM && socktype != SOCK_DGRAM)
+ return 0;
+ if (sa->sa_family != AF_INET
+#ifdef KRB5_USE_INET6
+ && sa->sa_family != AF_INET6
+#endif
+ )
+ return 0;
+ x = calloc (1, sizeof (*x));
+ if (x == 0) {
+ d->out_of_mem = 1;
+ return 1;
+ }
+ x->ai.ai_addr = (struct sockaddr *) &x->u;
+ x->ai.ai_socktype = socktype;
+ x->ai.ai_family = sa->sa_family;
+ if (sa->sa_family == AF_INET) {
+ x->u.sin = *(struct sockaddr_in *)sa;
+ x->ai.ai_addrlen = sizeof(struct sockaddr_in);
+ }
+#ifdef KRB5_USE_INET6
+ if (sa->sa_family == AF_INET6) {
+ x->u.sin6 = *(struct sockaddr_in6 *)sa;
+ x->ai.ai_addrlen = sizeof(struct sockaddr_in6);
+ }
+#endif
+ if (add_addrinfo_to_list (d->lp, &x->ai, free, x) != 0) {
+ /* Assumes only error is ENOMEM. */
+ d->out_of_mem = 1;
+ return 1;
+ }
+ return 0;
+}
+
+static krb5_error_code
+module_locate_server (krb5_context ctx, const krb5_data *realm,
+ struct addrlist *addrlist,
+ enum locate_service_type svc, int socktype, int family)
+{
+ struct krb5plugin_service_locate_result *res = NULL;
+ krb5_error_code code;
+ struct krb5plugin_service_locate_ftable *vtbl = NULL;
+ void **ptrs;
+ char *realmz; /* NUL-terminated realm */
+ int i;
+ struct module_callback_data cbdata = { 0, };
+ const char *msg;
+
+ Tprintf("in module_locate_server\n");
+ cbdata.lp = addrlist;
+ if (!PLUGIN_DIR_OPEN (&ctx->libkrb5_plugins)) {
+
+ code = krb5int_open_plugin_dirs (objdirs, NULL, &ctx->libkrb5_plugins,
+ &ctx->err);
+ if (code)
+ return KRB5_PLUGIN_NO_HANDLE;
+ }
+
+ code = krb5int_get_plugin_dir_data (&ctx->libkrb5_plugins,
+ "service_locator", &ptrs, &ctx->err);
+ if (code) {
+ Tprintf("error looking up plugin symbols: %s\n",
+ (msg = krb5_get_error_message(ctx, code)));
+ krb5_free_error_message(ctx, msg);
+ return KRB5_PLUGIN_NO_HANDLE;
+ }
+
+ if (realm->length >= UINT_MAX) {
+ krb5int_free_plugin_dir_data(ptrs);
+ return ENOMEM;
+ }
+ realmz = malloc(realm->length + 1);
+ if (realmz == NULL) {
+ krb5int_free_plugin_dir_data(ptrs);
+ return ENOMEM;
+ }
+ memcpy(realmz, realm->data, realm->length);
+ realmz[realm->length] = '\0';
+ for (i = 0; ptrs[i]; i++) {
+ void *blob;
+
+ vtbl = ptrs[i];
+ Tprintf("element %d is %p\n", i, ptrs[i]);
+
+ /* For now, don't keep the plugin data alive. For long-lived
+ contexts, it may be desirable to change that later. */
+ code = vtbl->init(ctx, &blob);
+ if (code)
+ continue;
+
+ code = vtbl->lookup(blob, svc, realmz, socktype, family,
+ module_callback, &cbdata);
+ vtbl->fini(blob);
+ if (code == KRB5_PLUGIN_NO_HANDLE) {
+ /* Module passes, keep going. */
+ /* XXX */
+ Tprintf("plugin doesn't handle this realm (KRB5_PLUGIN_NO_HANDLE)\n");
+ continue;
+ }
+ if (code != 0) {
+ /* Module encountered an actual error. */
+ Tprintf("plugin lookup routine returned error %d: %s\n",
+ code, error_message(code));
+ free(realmz);
+ krb5int_free_plugin_dir_data (ptrs);
+ return code;
+ }
+ break;
+ }
+ if (ptrs[i] == NULL) {
+ Tprintf("ran off end of plugin list\n");
+ free(realmz);
+ krb5int_free_plugin_dir_data (ptrs);
+ return KRB5_PLUGIN_NO_HANDLE;
+ }
+ Tprintf("stopped with plugin #%d, res=%p\n", i, res);
+
+ /* Got something back, yippee. */
+ Tprintf("now have %lu addrs in list %p\n",
+ (unsigned long) addrlist->naddrs, addrlist);
+ print_addrlist(addrlist);
+ free(realmz);
+ krb5int_free_plugin_dir_data (ptrs);
+ return 0;
+}
+
+static krb5_error_code
+prof_locate_server (krb5_context context, const krb5_data *realm,
+ struct addrlist *addrlist,
+ enum locate_service_type svc, int socktype, int family)
+{
+ const char *profname;
+ int dflport1, dflport2 = 0;
+ struct servent *serv;
+
+ switch (svc) {
+ case locate_service_kdc:
+ profname = KRB5_CONF_KDC;
+ /* We used to use /etc/services for these, but enough systems
+ have old, crufty, wrong settings that this is probably
+ better. */
+ kdc_ports:
+ dflport1 = htons(KRB5_DEFAULT_PORT);
+ dflport2 = htons(KRB5_DEFAULT_SEC_PORT);
+ break;
+ case locate_service_master_kdc:
+ profname = KRB5_CONF_MASTER_KDC;
+ goto kdc_ports;
+ case locate_service_kadmin:
+ profname = KRB5_CONF_ADMIN_SERVER;
+ dflport1 = htons(DEFAULT_KADM5_PORT);
+ break;
+ case locate_service_krb524:
+ profname = KRB5_CONF_KRB524_SERVER;
+ serv = getservbyname(KRB524_SERVICE, "udp");
+ dflport1 = serv ? serv->s_port : htons (KRB524_PORT);
+ break;
+ case locate_service_kpasswd:
+ profname = KRB5_CONF_KPASSWD_SERVER;
+ dflport1 = htons(DEFAULT_KPASSWD_PORT);
+ break;
+ default:
+ return EBUSY; /* XXX */
+ }
+
+ return krb5_locate_srv_conf_1 (context, realm, profname, addrlist,
+ 0, socktype,
+ dflport1, dflport2, family);
+}
+
+static krb5_error_code
+dns_locate_server (krb5_context context, const krb5_data *realm,
+ struct addrlist *addrlist,
+ enum locate_service_type svc, int socktype, int family)
+{
+ const char *dnsname;
+ int use_dns = _krb5_use_dns_kdc(context);
+ krb5_error_code code;
+
+ if (!use_dns)
+ return KRB5_PLUGIN_NO_HANDLE;
+
+ switch (svc) {
+ case locate_service_kdc:
+ dnsname = "_kerberos";
+ break;
+ case locate_service_master_kdc:
+ dnsname = "_kerberos-master";
+ break;
+ case locate_service_kadmin:
+ dnsname = "_kerberos-adm";
+ break;
+ case locate_service_krb524:
+ dnsname = "_krb524";
+ break;
+ case locate_service_kpasswd:
+ dnsname = "_kpasswd";
+ break;
+ default:
+ return KRB5_PLUGIN_NO_HANDLE;
+ }
+
+ code = 0;
+ if (socktype == SOCK_DGRAM || socktype == 0) {
+ code = krb5_locate_srv_dns_1(realm, dnsname, "_udp", addrlist, family);
+ if (code)
+ Tprintf("dns udp lookup returned error %d\n", code);
+ }
+ if ((socktype == SOCK_STREAM || socktype == 0) && code == 0) {
+ code = krb5_locate_srv_dns_1(realm, dnsname, "_tcp", addrlist, family);
+ if (code)
+ Tprintf("dns tcp lookup returned error %d\n", code);
+ }
+ return code;
+}
+
/*
- * Wrapper function for the two backends
+ * Wrapper function for the various backends
*/
krb5_error_code
krb5int_locate_server (krb5_context context, const krb5_data *realm,
- struct addrlist *addrlist,
- int get_masters,
- const char *profname, const char *dnsname,
- int socktype,
- /* network order port numbers! */
- int dflport1, int dflport2,
- int family)
+ struct addrlist *addrlist,
+ enum locate_service_type svc,
+ int socktype, int family)
{
krb5_error_code code;
struct addrlist al = ADDRLIST_INIT;
*addrlist = al;
- /*
- * We always try the local file first
- */
+ if (realm == NULL || realm->data == NULL || realm->data[0] == 0) {
+ krb5_set_error_message(context, KRB5_REALM_CANT_RESOLVE,
+ "Cannot find KDC for invalid realm name \"\"");
+ return KRB5_REALM_CANT_RESOLVE;
+ }
+
+ code = module_locate_server(context, realm, &al, svc, socktype, family);
+ Tprintf("module_locate_server returns %d\n", code);
+ if (code == KRB5_PLUGIN_NO_HANDLE) {
+ /*
+ * We always try the local file before DNS. Note that there
+ * is no way to indicate "service not available" via the
+ * config file.
+ */
- code = krb5_locate_srv_conf_1(context, realm, profname, &al, get_masters,
- socktype, dflport1, dflport2, family);
+ code = prof_locate_server(context, realm, &al, svc, socktype, family);
#ifdef KRB5_DNS_LOOKUP
- if (code && dnsname != 0) {
- int use_dns = _krb5_use_dns_kdc(context);
- if (use_dns) {
- code = 0;
- if (socktype == SOCK_DGRAM || socktype == 0) {
- code = krb5_locate_srv_dns_1(realm, dnsname, "_udp",
- &al, family);
- if (code)
- Tprintf("dns udp lookup returned error %d\n", code);
- }
- if ((socktype == SOCK_STREAM || socktype == 0) && code == 0) {
- code = krb5_locate_srv_dns_1(realm, dnsname, "_tcp",
- &al, family);
- if (code)
- Tprintf("dns tcp lookup returned error %d\n", code);
- }
- }
- }
+ if (code) { /* Try DNS for all profile errors? */
+ krb5_error_code code2;
+ code2 = dns_locate_server(context, realm, &al, svc, socktype,
+ family);
+ if (code2 != KRB5_PLUGIN_NO_HANDLE)
+ code = code2;
+ }
#endif /* KRB5_DNS_LOOKUP */
+
+ /* We could put more heuristics here, like looking up a hostname
+ of "kerberos."+REALM, etc. */
+ }
if (code == 0)
- Tprintf ("krb5int_locate_server found %d addresses\n",
- al.naddrs);
+ Tprintf ("krb5int_locate_server found %d addresses\n",
+ al.naddrs);
else
- Tprintf ("krb5int_locate_server returning error code %d\n",
- code);
+ Tprintf ("krb5int_locate_server returning error code %d/%s\n",
+ code, error_message(code));
if (code != 0) {
- if (al.space)
- free_list (&al);
- return code;
+ if (al.space)
+ free_list (&al);
+ return code;
}
- if (al.naddrs == 0) { /* No good servers */
- if (al.space)
- free_list (&al);
- return KRB5_REALM_CANT_RESOLVE;
+ if (al.naddrs == 0) { /* No good servers */
+ if (al.space)
+ free_list (&al);
+ krb5_set_error_message(context, KRB5_REALM_CANT_RESOLVE,
+ "Cannot resolve network address for KDC in realm \"%.*s\"",
+ realm->length, realm->data);
+
+ return KRB5_REALM_CANT_RESOLVE;
}
*addrlist = al;
return 0;
krb5_error_code
krb5_locate_kdc(krb5_context context, const krb5_data *realm,
- struct addrlist *addrlist,
- int get_masters, int socktype, int family)
+ struct addrlist *addrlist,
+ int get_masters, int socktype, int family)
{
- int udpport, sec_udpport;
-
- udpport = get_port (KDC_PORTNAME, 0, KRB5_DEFAULT_PORT);
- if (socktype == SOCK_STREAM)
- sec_udpport = 0;
- else {
- sec_udpport = get_port (KDC_SECONDARY_PORTNAME, 0,
- (udpport == htons (KRB5_DEFAULT_PORT)
- ? KRB5_DEFAULT_SEC_PORT
- : KRB5_DEFAULT_PORT));
- if (sec_udpport == udpport)
- sec_udpport = 0;
- }
-
- return krb5int_locate_server(context, realm, addrlist, 0,
- get_masters ? "master_kdc" : "kdc",
- (get_masters
- ? "_kerberos-master"
- : "_kerberos"),
- socktype, udpport, sec_udpport, family);
+ return krb5int_locate_server(context, realm, addrlist,
+ (get_masters
+ ? locate_service_master_kdc
+ : locate_service_kdc),
+ socktype, family);
}
projects / krb5.git / blobdiff