310 lines
7.3 KiB
C
310 lines
7.3 KiB
C
/* Copyright (C) 1996-2003, 2006 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>, 1996.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <nss.h>
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/* The following is an ugly trick to avoid a prototype declaration for
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_nss_nis_endgrent. */
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#define _nss_nis_endnetent _nss_nis_endnetent_XXX
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#include <netdb.h>
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#undef _nss_nis_endnetent
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#include <ctype.h>
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#include <errno.h>
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#include <stdint.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <bits/libc-lock.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "nss-nis.h"
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/* Get the declaration of the parser function. */
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#define ENTNAME netent
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#define EXTERN_PARSER
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#include <nss/nss_files/files-parse.c>
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__libc_lock_define_initialized (static, lock)
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static bool_t new_start = 1;
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static char *oldkey;
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static int oldkeylen;
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enum nss_status
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_nss_nis_setnetent (int stayopen)
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{
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__libc_lock_lock (lock);
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new_start = 1;
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if (oldkey != NULL)
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{
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free (oldkey);
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oldkey = NULL;
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oldkeylen = 0;
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}
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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/* Make _nss_nis_endnetent an alias of _nss_nis_setnetent. We do this
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even though the prototypes don't match. The argument of setnetent
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is not used so this makes no difference. */
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strong_alias (_nss_nis_setnetent, _nss_nis_endnetent)
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static enum nss_status
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internal_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen,
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int *errnop, int *herrnop)
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{
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struct parser_data *data = (void *) buffer;
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char *domain;
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if (__builtin_expect (yp_get_default_domain (&domain), 0))
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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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int parse_res;
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do
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{
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char *result;
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char *outkey;
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int len;
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int keylen;
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int yperr;
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if (new_start)
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yperr = yp_first (domain, "networks.byname", &outkey, &keylen, &result,
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&len);
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else
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yperr = yp_next (domain, "networks.byname", oldkey, oldkeylen, &outkey,
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&keylen, &result, &len);
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if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_TRYAGAIN)
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{
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*herrnop = NETDB_INTERNAL;
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*errnop = errno;
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}
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return retval;
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}
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if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
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{
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free (result);
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*errnop = ERANGE;
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*herrnop = NETDB_INTERNAL;
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return NSS_STATUS_TRYAGAIN;
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}
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char *p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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while (isspace (*p))
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++p;
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free (result);
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parse_res = _nss_files_parse_netent (p, net, data, buflen, errnop);
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if (__builtin_expect (parse_res == -1, 0))
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{
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free (outkey);
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*herrnop = NETDB_INTERNAL;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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free (oldkey);
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oldkey = outkey;
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oldkeylen = keylen;
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new_start = 0;
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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_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen,
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int *errnop, int *herrnop)
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{
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enum nss_status status;
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__libc_lock_lock (lock);
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status = internal_nis_getnetent_r (net, buffer, buflen, errnop, herrnop);
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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_nis_getnetbyname_r (const char *name, struct netent *net, char *buffer,
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size_t buflen, int *errnop, int *herrnop)
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{
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if (name == NULL)
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{
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*errnop = EINVAL;
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*herrnop = NETDB_INTERNAL;
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return NSS_STATUS_UNAVAIL;
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}
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char *domain;
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if (__builtin_expect (yp_get_default_domain (&domain), 0))
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return NSS_STATUS_UNAVAIL;
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struct parser_data *data = (void *) buffer;
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if (buflen < sizeof *data + 1)
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{
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*herrnop = NETDB_INTERNAL;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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/* Convert name to lowercase. */
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size_t namlen = strlen (name);
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char name2[namlen + 1];
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size_t i;
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for (i = 0; i < namlen; ++i)
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name2[i] = _tolower (name[i]);
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name2[i] = '\0';
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char *result;
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int len;
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int yperr = yp_match (domain, "networks.byname", name2, namlen, &result,
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&len);
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if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_TRYAGAIN)
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{
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*errnop = errno;
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*herrnop = NETDB_INTERNAL;
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}
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return retval;
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}
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if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
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{
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free (result);
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*errnop = ERANGE;
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*herrnop = NETDB_INTERNAL;
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return NSS_STATUS_TRYAGAIN;
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}
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char *p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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while (isspace (*p))
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++p;
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free (result);
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int parse_res = _nss_files_parse_netent (p, net, data, buflen, errnop);
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if (__builtin_expect (parse_res < 1, 0))
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{
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*herrnop = NETDB_INTERNAL;
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if (parse_res == -1)
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return NSS_STATUS_TRYAGAIN;
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else
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return NSS_STATUS_NOTFOUND;
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}
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else
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_getnetbyaddr_r (uint32_t addr, int type, struct netent *net,
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char *buffer, size_t buflen, int *errnop,
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int *herrnop)
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{
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char *domain;
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if (__builtin_expect (yp_get_default_domain (&domain), 0))
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return NSS_STATUS_UNAVAIL;
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struct in_addr in = inet_makeaddr (addr, 0);
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char *buf = inet_ntoa (in);
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size_t blen = strlen (buf);
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while (1)
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{
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char *result;
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int len;
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int yperr = yp_match (domain, "networks.byaddr", buf, blen, &result,
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&len);
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if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_NOTFOUND)
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{
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if (buf[blen - 2] == '.' && buf[blen - 1] == '0')
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{
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/* Try again, but with trailing dot(s)
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removed (one by one) */
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buf[blen - 2] = '\0';
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blen -= 2;
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continue;
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}
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else
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return NSS_STATUS_NOTFOUND;
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}
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else
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{
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if (retval == NSS_STATUS_TRYAGAIN)
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*errnop = errno;
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return retval;
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}
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}
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if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
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{
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free (result);
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*errnop = ERANGE;
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*herrnop = NETDB_INTERNAL;
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return NSS_STATUS_TRYAGAIN;
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}
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char *p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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while (isspace (*p))
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++p;
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free (result);
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int parse_res = _nss_files_parse_netent (p, net, (void *) buffer,
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buflen, errnop);
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if (__builtin_expect (parse_res < 1, 0))
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{
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*herrnop = NETDB_INTERNAL;
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if (parse_res == -1)
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return NSS_STATUS_TRYAGAIN;
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else
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return NSS_STATUS_NOTFOUND;
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}
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else
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return NSS_STATUS_SUCCESS;
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}
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}
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