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/*
* lib/krb5/os/get_krbhst.c
*
* Copyright 1990,1991 by the 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
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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.
*
*
* krb5_get_krbhst() function.
*/
#include "k5-int.h"
#include <stdio.h>
#include <ctype.h>
/*
Figures out the Kerberos server names for the given realm, filling in a
pointer to an argv[] style list of names, terminated with a null pointer.
If the realm is unknown, the filled-in pointer is set to NULL.
The pointer array and strings pointed to are all in allocated storage,
and should be freed by the caller when finished.
returns system errors
*/
/*
* Implementation: the server names for given realms are stored in a
* configuration file,
* named by krb5_config_file; the first token (on the first line) in
* this file is taken as the default local realm name.
*
* Each succeeding line has a realm name as the first token, and a server name
* as a second token. Additional tokens may be present on the line, but
* are ignored by this function.
*
* All lines which begin with the desired realm name will have the
* hostname added to the list returned.
*/
krb5_error_code
krb5_get_krbhst(context, realm, hostlist)
krb5_context context;
const krb5_data *realm;
char ***hostlist;
{
char **values, **cpp, *cp;
const char *realm_kdc_names[4];
krb5_error_code retval;
int i, count;
char **rethosts;
rethosts = 0;
realm_kdc_names[0] = "realms";
realm_kdc_names[1] = realm->data;
realm_kdc_names[2] = "kdc";
realm_kdc_names[3] = 0;
if (context->profile == 0)
return KRB5_CONFIG_CANTOPEN;
retval = profile_get_values(context->profile, realm_kdc_names, &values);
if (retval == PROF_NO_SECTION)
return KRB5_REALM_UNKNOWN;
if (retval == PROF_NO_RELATION)
return KRB5_CONFIG_BADFORMAT;
if (retval)
return retval;
/*
* Do cleanup over the list. We allow for some extra field to be
* added to the kdc line later (maybe the port number)
*/
for (cpp = values; *cpp; cpp++) {
cp = strchr(*cpp, ' ');
if (cp)
*cp = 0;
cp = strchr(*cpp, '\t');
if (cp)
*cp = 0;
cp = strchr(*cpp, ':');
if (cp)
*cp = 0;
}
count = cpp - values;
rethosts = malloc(sizeof(char *) * (count + 1));
if (!rethosts) {
retval = ENOMEM;
goto cleanup;
}
for (i = 0; i < count; i++) {
int len = strlen (values[i]) + 1;
rethosts[i] = malloc(len);
if (!rethosts[i]) {
retval = ENOMEM;
goto cleanup;
}
memcpy (rethosts[i], values[i], len);
}
rethosts[count] = 0;
cleanup:
if (retval && rethosts) {
for (cpp = rethosts; *cpp; cpp++)
free(*cpp);
free(rethosts);
rethosts = 0;
}
profile_free_list(values);
*hostlist = rethosts;
return retval;
}
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