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/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <nss.h>
#include <netdb.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
__libc_lock_define_initialized (static, lock)
struct intern_t
{
bool_t new_start;
char *oldkey;
int oldkeylen;
};
typedef struct intern_t intern_t;
static intern_t intern = {TRUE, NULL, 0};
static enum nss_status
internal_nis_setservent (intern_t * intern)
{
intern->new_start = 1;
if (intern->oldkey != NULL)
{
free (intern->oldkey);
intern->oldkey = NULL;
intern->oldkeylen = 0;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_setservent (void)
{
enum nss_status status;
__libc_lock_lock (lock);
status = internal_nis_setservent (&intern);
__libc_lock_unlock (lock);
return status;
}
static enum nss_status
internal_nis_endservent (intern_t * intern)
{
intern->new_start = 1;
if (intern->oldkey != NULL)
{
free (intern->oldkey);
intern->oldkey = NULL;
intern->oldkeylen = 0;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_endservent (void)
{
enum nss_status status;
__libc_lock_lock (lock);
status = internal_nis_endservent (&intern);
__libc_lock_unlock (lock);
return status;
}
static enum nss_status
internal_nis_getservent_r (struct servent *serv, char *buffer,
size_t buflen, intern_t *data)
{
char *domain;
char *result;
int len, parse_res;
char *outkey;
int keylen;
char *p;
if (yp_get_default_domain (&domain))
return NSS_STATUS_UNAVAIL;
/* Get the next entry until we found a correct one. */
do
{
enum nss_status retval;
if (data->new_start)
retval = yperr2nss (yp_first (domain, "services.byname",
&outkey, &keylen, &result, &len));
else
retval = yperr2nss ( yp_next (domain, "services.byname",
data->oldkey, data->oldkeylen,
&outkey, &keylen, &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
__set_errno (EAGAIN);
return retval;
}
if (len + 1 > buflen)
{
free (result);
__set_errno (ERANGE);
return NSS_STATUS_TRYAGAIN;
}
p = strncpy (buffer, result, len);
buffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
parse_res = _nss_files_parse_servent (p, serv, buffer, buflen);
if (!parse_res && errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
free (data->oldkey);
data->oldkey = outkey;
data->oldkeylen = keylen;
data->new_start = 0;
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getservent_r (struct servent *serv, char *buffer, size_t buflen)
{
enum nss_status status;
__libc_lock_lock (lock);
status = internal_nis_getservent_r (serv, buffer, buflen, &intern);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nis_getservbyname_r (const char *name, char *protocol,
struct servent *serv, char *buffer, size_t buflen)
{
intern_t data = {TRUE, NULL, 0};
enum nss_status status;
int found;
if (name == NULL || protocol == NULL)
{
__set_errno (EINVAL);
return NSS_STATUS_UNAVAIL;
}
status = internal_nis_setservent (&data);
if (status != NSS_STATUS_SUCCESS)
return status;
found = 0;
while (!found &&
((status = internal_nis_getservent_r (serv, buffer, buflen, &data))
== NSS_STATUS_SUCCESS))
{
if (strcmp (serv->s_name, name) == 0)
{
if (strcmp (serv->s_proto, protocol) == 0)
{
found = 1;
}
}
}
internal_nis_endservent (&data);
if (!found && status == NSS_STATUS_SUCCESS)
return NSS_STATUS_NOTFOUND;
else
return status;
}
enum nss_status
_nss_nis_getservbyport_r (int port, char *protocol, struct servent *serv,
char *buffer, size_t buflen)
{
intern_t data = {TRUE, NULL, 0};
enum nss_status status;
int found;
if (protocol == NULL)
{
__set_errno (EINVAL);
return NSS_STATUS_UNAVAIL;
}
status = internal_nis_setservent (&data);
if (status != NSS_STATUS_SUCCESS)
return status;
found = 0;
while (!found &&
((status = internal_nis_getservent_r (serv, buffer, buflen, &data))
== NSS_STATUS_SUCCESS))
{
if (htons (serv->s_port) == port)
{
if (strcmp (serv->s_proto, protocol) == 0)
{
found = 1;
}
}
}
internal_nis_endservent (&data);
if (!found && status == NSS_STATUS_SUCCESS)
return NSS_STATUS_NOTFOUND;
else
return status;
}
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