298 lines
7.3 KiB
C
298 lines
7.3 KiB
C
/* Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <nss.h>
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#include <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <bits/libc-lock.h>
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#include <netdb.h>
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#include <netinet/ether.h>
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#include <rpcsvc/nis.h>
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#include <rpcsvc/nislib.h>
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#include <netinet/if_ether.h>
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#include "nss-nisplus.h"
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__libc_lock_define_initialized (static, lock)
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static nis_result *result = NULL;
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static nis_name tablename_val = NULL;
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static u_long tablename_len = 0;
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/* Because the `ethers' lookup does not fit so well in the scheme so
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we define a dummy struct here which helps us to use the available
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functions. */
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struct etherent
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{
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const char *e_name;
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struct ether_addr e_addr;
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};
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struct etherent_data {};
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#define NISENTRYVAL(idx,col,res) \
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((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
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#define NISENTRYLEN(idx,col,res) \
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((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
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static int
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_nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether,
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char *buffer, size_t buflen)
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{
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char *p = buffer;
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size_t room_left = buflen;
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if (result == NULL)
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return 0;
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if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
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result->objects.objects_len != 1 ||
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__type_of (NIS_RES_OBJECT (result)) != ENTRY_OBJ ||
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strcmp(NIS_RES_OBJECT (result)->EN_data.en_type,
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"ethers_tbl") != 0 ||
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NIS_RES_OBJECT(result)->EN_data.en_cols.en_cols_len < 2)
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return 0;
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/* Generate the ether entry format and use the normal parser */
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if (NISENTRYLEN (0, 0, result) +1 > room_left)
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{
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__set_errno (ERANGE);
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return -1;
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}
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strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
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room_left -= (NISENTRYLEN (0, 0, result) +1);
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ether->e_name = p;
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ether->e_addr = *ether_aton (NISENTRYVAL (0, 1, result));
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return 1;
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}
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static enum nss_status
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_nss_create_tablename (void)
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{
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if (tablename_val == NULL)
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{
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char buf [40 + strlen (nis_local_directory ())];
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char *p;
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p = stpcpy (buf, "ethers.org_dir.");
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p = stpcpy (p, nis_local_directory ());
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tablename_val = strdup (buf);
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if (tablename_val == NULL)
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return NSS_STATUS_TRYAGAIN;
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tablename_len = strlen (tablename_val);
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}
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nisplus_setetherent (void)
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{
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enum nss_status status;
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status = NSS_STATUS_SUCCESS;
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__libc_lock_lock (lock);
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if (result)
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nis_freeresult (result);
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result = NULL;
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if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
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status = NSS_STATUS_UNAVAIL;
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nisplus_endetherent (void)
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{
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__libc_lock_lock (lock);
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if (result)
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nis_freeresult (result);
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result = NULL;
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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internal_nisplus_getetherent_r (struct etherent *ether, char *buffer,
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size_t buflen)
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{
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int parse_res;
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if (tablename_val == NULL)
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if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
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return NSS_STATUS_UNAVAIL;
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/* Get the next entry until we found a correct one. */
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do
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{
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nis_result *saved_result;
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if (result == NULL)
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{
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saved_result = NULL;
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result = nis_first_entry(tablename_val);
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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return niserr2nss (result->status);
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}
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else
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{
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nis_result *res2;
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res2 = nis_next_entry(tablename_val, &result->cookie);
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saved_result = result;
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result = res2;
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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{
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nis_freeresult (saved_result);
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return niserr2nss (result->status);
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}
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}
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if ((parse_res = _nss_nisplus_parse_etherent (result, ether, buffer,
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buflen)) == -1)
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{
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nis_freeresult (result);
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result = saved_result;
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return NSS_STATUS_TRYAGAIN;
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}
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else
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{
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if (saved_result != NULL)
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nis_freeresult (saved_result);
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}
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} while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nisplus_getetherent_r (struct etherent *result, char *buffer,
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size_t buflen)
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{
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int status;
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__libc_lock_lock (lock);
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status = internal_nisplus_getetherent_r (result, buffer, buflen);
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__libc_lock_unlock (lock);
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return status;
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}
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enum nss_status
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_nss_nisplus_gethostton_r (const char *name, struct etherent *eth,
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char *buffer, size_t buflen)
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{
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int parse_res;
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if (tablename_val == NULL)
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if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
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return NSS_STATUS_UNAVAIL;
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if (name != NULL)
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{
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nis_result *result;
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char buf[strlen (name) + 40 + tablename_len];
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sprintf(buf, "[name=%s],%s", name, tablename_val);
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result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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{
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enum nss_status status = niserr2nss (result->status);
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nis_freeresult (result);
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return status;
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}
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if ((parse_res = _nss_nisplus_parse_etherent (result, eth, buffer,
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buflen)) == -1)
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{
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nis_freeresult (result);
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return NSS_STATUS_TRYAGAIN;
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}
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if (parse_res)
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return NSS_STATUS_SUCCESS;
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}
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return NSS_STATUS_NOTFOUND;
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}
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enum nss_status
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_nss_nisplus_getntohost_r (const struct ether_addr *addr,
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struct etherent *eth,
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char *buffer, size_t buflen)
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{
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if (tablename_val == NULL)
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if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
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return NSS_STATUS_UNAVAIL;
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if (addr == NULL)
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{
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__set_errno (EINVAL);
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return NSS_STATUS_UNAVAIL;
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}
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else
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{
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int parse_res;
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nis_result *result;
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char buf[255 + tablename_len];
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memset (&buf, '\0', sizeof (buf));
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snprintf(buf, sizeof (buf), "[addr=%x:%x:%x:%x:%x:%x],ethers.org_dir",
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addr->ether_addr_octet[0], addr->ether_addr_octet[1],
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addr->ether_addr_octet[2], addr->ether_addr_octet[3],
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addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
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result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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{
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enum nss_status status = niserr2nss (result->status);
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nis_freeresult (result);
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return status;
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}
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if ((parse_res = _nss_nisplus_parse_etherent (result, eth, buffer,
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buflen)) == -1)
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{
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nis_freeresult (result);
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return NSS_STATUS_TRYAGAIN;
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}
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if (parse_res)
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return NSS_STATUS_SUCCESS;
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}
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return NSS_STATUS_NOTFOUND;
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}
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