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glibc/nis/nss_nis/nis-network.c
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/* Copyright (C) 1996, 1997 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 <netinet/in.h> | |
#include <arpa/inet.h> | |
#include <libc-lock.h> | |
#include <rpcsvc/yp.h> | |
#include <rpcsvc/ypclnt.h> | |
#include "nss-nis.h" | |
/* Get the declaration of the parser function. */ | |
#define ENTNAME netent | |
#define EXTERN_PARSER | |
#include <nss/nss_files/files-parse.c> | |
__libc_lock_define_initialized (static, lock) | |
static bool_t new_start = 1; | |
static char *oldkey = NULL; | |
static int oldkeylen = 0; | |
enum nss_status | |
_nss_nis_setnetent (void) | |
{ | |
__libc_lock_lock (lock); | |
new_start = 1; | |
if (oldkey != NULL) | |
{ | |
free (oldkey); | |
oldkey = NULL; | |
oldkeylen = 0; | |
} | |
__libc_lock_unlock (lock); | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_nis_endnetent (void) | |
{ | |
__libc_lock_lock (lock); | |
new_start = 1; | |
if (oldkey != NULL) | |
{ | |
free (oldkey); | |
oldkey = NULL; | |
oldkeylen = 0; | |
} | |
__libc_lock_unlock (lock); | |
return NSS_STATUS_SUCCESS; | |
} | |
static enum nss_status | |
internal_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen, | |
int *herrnop) | |
{ | |
struct parser_data *data = (void *) buffer; | |
char *domain, *result, *outkey; | |
int len, keylen, parse_res; | |
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; | |
char *p; | |
if (new_start) | |
retval = yperr2nss (yp_first (domain, "networks.byname", | |
&outkey, &keylen, &result, &len)); | |
else | |
retval = yperr2nss ( yp_next (domain, "networks.byname", | |
oldkey, oldkeylen, | |
&outkey, &keylen, &result, &len)); | |
if (retval != NSS_STATUS_SUCCESS) | |
{ | |
if (retval == NSS_STATUS_TRYAGAIN) | |
{ | |
*herrnop = NETDB_INTERNAL; | |
__set_errno (EAGAIN); | |
} | |
return retval; | |
} | |
if ((size_t) (len + 1) > buflen) | |
{ | |
free (result); | |
__set_errno (ERANGE); | |
*herrnop = NETDB_INTERNAL; | |
return NSS_STATUS_TRYAGAIN; | |
} | |
p = strncpy (buffer, result, len); | |
buffer[len] = '\0'; | |
while (isspace (*p)) | |
++p; | |
free (result); | |
parse_res = _nss_files_parse_netent (p, net, data, buflen); | |
if (!parse_res && errno == ERANGE) | |
{ | |
*herrnop = NETDB_INTERNAL; | |
return NSS_STATUS_TRYAGAIN; | |
} | |
free (oldkey); | |
oldkey = outkey; | |
oldkeylen = keylen; | |
new_start = 0; | |
} | |
while (!parse_res); | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen, | |
int *herrnop) | |
{ | |
enum nss_status status; | |
__libc_lock_lock (lock); | |
status = internal_nis_getnetent_r (net, buffer, buflen, herrnop); | |
__libc_lock_unlock (lock); | |
return status; | |
} | |
enum nss_status | |
_nss_nis_getnetbyname_r (const char *name, struct netent *net, | |
char *buffer, size_t buflen, int *herrnop) | |
{ | |
enum nss_status retval; | |
struct parser_data *data = (void *) buffer; | |
char *domain, *result, *p; | |
int len, parse_res; | |
if (name == NULL) | |
{ | |
__set_errno (EINVAL); | |
*herrnop = NETDB_INTERNAL; | |
return NSS_STATUS_UNAVAIL; | |
} | |
if (yp_get_default_domain (&domain)) | |
return NSS_STATUS_UNAVAIL; | |
retval = yperr2nss (yp_match (domain, "networks.byname", name, | |
strlen (name), &result, &len)); | |
if (retval != NSS_STATUS_SUCCESS) | |
{ | |
if (retval == NSS_STATUS_TRYAGAIN) | |
{ | |
__set_errno (EAGAIN); | |
*herrnop = NETDB_INTERNAL; | |
} | |
return retval; | |
} | |
if ((size_t) (len + 1) > buflen) | |
{ | |
free (result); | |
__set_errno (ERANGE); | |
*herrnop = NETDB_INTERNAL; | |
return NSS_STATUS_TRYAGAIN; | |
} | |
p = strncpy (buffer, result, len); | |
buffer[len] = '\0'; | |
while (isspace (*p)) | |
++p; | |
free (result); | |
parse_res = _nss_files_parse_netent (p, net, data, buflen); | |
if (!parse_res) | |
{ | |
*herrnop = NETDB_INTERNAL; | |
if (errno == ERANGE) | |
return NSS_STATUS_TRYAGAIN; | |
else | |
return NSS_STATUS_NOTFOUND; | |
} | |
else | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_nis_getnetbyaddr_r (unsigned long addr, int type, struct netent *net, | |
char *buffer, size_t buflen, int *herrnop) | |
{ | |
struct parser_data *data = (void *) buffer; | |
char *domain; | |
char *result; | |
int len; | |
char buf[256]; | |
int blen; | |
struct in_addr in; | |
char *p; | |
if (yp_get_default_domain (&domain)) | |
return NSS_STATUS_UNAVAIL; | |
in = inet_makeaddr (addr, 0); | |
strcpy (buf, inet_ntoa (in)); | |
blen = strlen (buf); | |
while (1) | |
{ | |
enum nss_status retval; | |
int parse_res; | |
retval = yperr2nss (yp_match (domain, "networks.byaddr", buf, | |
strlen (buf), &result, &len)); | |
if (retval != NSS_STATUS_SUCCESS) | |
{ | |
if (retval == NSS_STATUS_NOTFOUND) | |
{ | |
if (buf[blen - 2] == '.' && buf[blen - 1] == '0') | |
{ | |
/* Try again, but with trailing dot(s) | |
removed (one by one) */ | |
buf[blen - 2] = '\0'; | |
blen -= 2; | |
continue; | |
} | |
else | |
return NSS_STATUS_NOTFOUND; | |
} | |
else | |
{ | |
if (retval == NSS_STATUS_TRYAGAIN) | |
__set_errno (EAGAIN); | |
return retval; | |
} | |
} | |
if ((size_t) (len + 1) > buflen) | |
{ | |
free (result); | |
__set_errno (ERANGE); | |
*herrnop = NETDB_INTERNAL; | |
return NSS_STATUS_TRYAGAIN; | |
} | |
p = strncpy (buffer, result, len); | |
buffer[len] = '\0'; | |
while (isspace (*p)) | |
++p; | |
free (result); | |
parse_res = _nss_files_parse_netent (p, net, data, buflen); | |
if (!parse_res) | |
{ | |
*herrnop = NETDB_INTERNAL; | |
if (errno == ERANGE) | |
return NSS_STATUS_TRYAGAIN; | |
else | |
return NSS_STATUS_NOTFOUND; | |
} | |
else | |
return NSS_STATUS_SUCCESS; | |
} | |
} |