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glibc/nis/nss_nisplus/nisplus-network.c

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/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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 <errno.h>
#include <ctype.h>
#include <string.h>
#include <arpa/inet.h>
#include <libc-lock.h>
#include <rpcsvc/nis.h>
#include <rpcsvc/nislib.h>
#include "nss-nisplus.h"
/* Get the declaration of the parser function. */
#define ENTNAME netent
#define DATABASE "networks"
#define TRAILING_LIST_MEMBER n_aliases
#define TRAILING_LIST_SEPARATOR_P isspace
#include "../nss/nss_files/files-parse.c"
LINE_PARSER
("#",
{
char *addr;
STRING_FIELD (result->n_name, isspace, 1);
STRING_FIELD (addr, isspace, 1);
result->n_net = inet_network (addr);
})
__libc_lock_define_initialized (static, lock)
static nis_result *result = NULL;
static nis_name *names = NULL;
#define NISENTRYVAL(idx,col,res) \
((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
#define NISENTRYLEN(idx,col,res) \
((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
static int
_nss_nisplus_parse_netent (nis_result *result, struct netent *network,
char *buffer, size_t buflen)
{
char *p = buffer;
size_t room_left = buflen;
unsigned int i;
struct parser_data *data = (void *) buffer;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
"networks_tbl") != 0 ||
result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3)
return 0;
/* Generate the network entry format and use the normal parser */
if (NISENTRYLEN (0, 0, result) +1 > room_left)
{
__set_errno (ERANGE);
return 0;
}
memset (p, '\0', room_left);
strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
room_left -= (NISENTRYLEN (0, 0, result) +1);
if (NISENTRYLEN (0, 2, result) +1 > room_left)
{
__set_errno (ERANGE);
return 0;
}
strcat (p, "\t");
strncat (p, NISENTRYVAL (0, 2, result), NISENTRYLEN (0, 2, result));
room_left -= (NISENTRYLEN (0, 2, result) + 1);
/* + 1: We overwrite the last \0 */
for (i = 1; i < result->objects.objects_len; i++)
{
if (NISENTRYLEN (i, 1, result) +1 > room_left)
{
__set_errno (ERANGE);
return 0;
}
strcat (p, " ");
strncat (p, NISENTRYVAL (i, 1, result), NISENTRYLEN (i, 1, result));
room_left -= (NISENTRYLEN (i, 1, result) + 1);
}
return _nss_files_parse_netent (p, network, data, buflen);
}
enum nss_status
_nss_nisplus_setnetent (void)
{
__libc_lock_lock (lock);
if (result)
nis_freeresult (result);
result = NULL;
if (names)
{
nis_freenames (names);
names = NULL;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_endnetent (void)
{
__libc_lock_lock (lock);
if (result)
nis_freeresult (result);
result = NULL;
if (names)
{
nis_freenames (names);
names = NULL;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_nisplus_getnetent_r (struct netent *network, char *buffer,
size_t buflen, int *herrnop)
{
int parse_res;
/* Get the next entry until we found a correct one. */
do
{
if (result == NULL)
{
names = nis_getnames("networks.org_dir");
if (names == NULL || names[0] == NULL)
return NSS_STATUS_UNAVAIL;
result = nis_first_entry(names[0]);
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
int retval;
retval = niserr2nss (result->status);
if (retval == NSS_STATUS_TRYAGAIN)
{
*herrnop = NETDB_INTERNAL;
__set_errno (EAGAIN);
}
return retval;
}
}
else
{
nis_result *res;
res = nis_next_entry(names[0], &result->cookie);
nis_freeresult (result);
result = res;
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
int retval;
retval = niserr2nss (result->status);
if (retval == NSS_STATUS_TRYAGAIN)
{
*herrnop = NETDB_INTERNAL;
__set_errno (EAGAIN);
}
return retval;
}
}
parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen);
if (!parse_res && errno == ERANGE)
{
*herrnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
}
} while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_getnetent_r (struct netent *result, char *buffer,
size_t buflen, int *herrnop)
{
int status;
__libc_lock_lock (lock);
status = internal_nisplus_getnetent_r (result, buffer, buflen, herrnop);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_getnetbyname_r (const char *name, struct netent *network,
char *buffer, size_t buflen, int *herrnop)
{
int parse_res, retval;
if (name == NULL)
{
__set_errno (EINVAL);
*herrnop = NETDB_INTERNAL;
return NSS_STATUS_UNAVAIL;
}
else
{
nis_result *result;
char buf[strlen (name) + 255];
/* Search at first in the alias list, and use the correct name
for the next search */
sprintf(buf, "[name=%s],networks.org_dir", name);
result = nis_list(buf, EXPAND_NAME, NULL, NULL);
/* If we do not find it, try it as original name. But if the
database is correct, we should find it in the first case, too */
if ((result->status != NIS_SUCCESS &&
result->status != NIS_S_SUCCESS) ||
result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
"networks_tbl") != 0 ||
result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3)
sprintf(buf, "[cname=%s],networks.org_dir", name);
else
sprintf(buf, "[cname=%s],networks.org_dir", NISENTRYVAL(0, 0, result));
nis_freeresult (result);
result = nis_list(buf, EXPAND_NAME, NULL, NULL);
retval = niserr2nss (result->status);
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
{
__set_errno (EAGAIN);
*herrnop = NETDB_INTERNAL;
}
nis_freeresult (result);
return retval;
}
parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen);
nis_freeresult (result);
if (parse_res)
return NSS_STATUS_SUCCESS;
*herrnop = NETDB_INTERNAL;
if (!parse_res && errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
}
/* XXX type is ignored, SUN's NIS+ table doesn't support it */
enum nss_status
_nss_nisplus_getnetbyaddr_r (const unsigned long addr, const int type,
struct netent *network,
char *buffer, size_t buflen, int *herrnop)
{
int parse_res, retval;
nis_result *result;
char buf[1024];
struct in_addr in;
in = inet_makeaddr (addr, 0);
snprintf(buf, sizeof (buf) - 1, "[addr=%s],networks.org_dir",
inet_ntoa (in));
result = nis_list(buf, EXPAND_NAME, NULL, NULL);
retval = niserr2nss (result->status);
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
{
__set_errno (EAGAIN);
*herrnop = NETDB_INTERNAL;
}
nis_freeresult (result);
return retval;
}
parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen);
nis_freeresult (result);
if (parse_res)
return NSS_STATUS_SUCCESS;
*herrnop = NETDB_INTERNAL;
if (!parse_res && errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
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