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glibc/nis/nss_nis/nis-ethers.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 <ctype.h> | |
#include <errno.h> | |
#include <string.h> | |
#include <libc-lock.h> | |
#include <rpcsvc/yp.h> | |
#include <rpcsvc/ypclnt.h> | |
#include <netinet/if_ether.h> | |
#include "nss-nis.h" | |
/* Protect global state against multiple changers */ | |
__libc_lock_define_initialized (static, lock) | |
struct ether | |
{ | |
const char *e_name; | |
struct ether_addr e_addr; | |
}; | |
/* Get the declaration of the parser function. */ | |
#define ENTNAME etherent | |
#define STRUCTURE ether | |
#define EXTERN_PARSER | |
#include <nss/nss_files/files-parse.c> | |
struct response | |
{ | |
char *val; | |
struct response *next; | |
}; | |
static struct response *start = NULL; | |
static struct response *next = NULL; | |
static int | |
saveit (int instatus, char *inkey, int inkeylen, char *inval, | |
int invallen, char *indata) | |
{ | |
if (instatus != YP_TRUE) | |
return instatus; | |
if (inkey && inkeylen > 0 && inval && invallen > 0) | |
{ | |
if (start == NULL) | |
{ | |
start = malloc (sizeof (struct response)); | |
next = start; | |
} | |
else | |
{ | |
next->next = malloc (sizeof (struct response)); | |
next = next->next; | |
} | |
next->next = NULL; | |
next->val = malloc (invallen + 1); | |
strncpy (next->val, inval, invallen); | |
next->val[invallen] = '\0'; | |
} | |
return 0; | |
} | |
enum nss_status | |
internal_nis_setetherent (void) | |
{ | |
char *domainname; | |
struct ypall_callback ypcb; | |
enum nss_status status; | |
yp_get_default_domain (&domainname); | |
while (start != NULL) | |
{ | |
if (start->val != NULL) | |
free (start->val); | |
next = start; | |
start = start->next; | |
free (next); | |
} | |
start = NULL; | |
ypcb.foreach = saveit; | |
ypcb.data = NULL; | |
status = yperr2nss (yp_all (domainname, "ethers.byname", &ypcb)); | |
next = start; | |
return status; | |
} | |
enum nss_status | |
_nss_nis_setetherent (void) | |
{ | |
enum nss_status result; | |
__libc_lock_lock (lock); | |
result = internal_nis_setetherent (); | |
__libc_lock_unlock (lock); | |
return result; | |
} | |
enum nss_status | |
_nss_nis_endetherent (void) | |
{ | |
__libc_lock_lock (lock); | |
while (start != NULL) | |
{ | |
if (start->val != NULL) | |
free (start->val); | |
next = start; | |
start = start->next; | |
free (next); | |
} | |
start = NULL; | |
next = NULL; | |
__libc_lock_unlock (lock); | |
return NSS_STATUS_SUCCESS; | |
} | |
static enum nss_status | |
internal_nis_getetherent_r (struct ether *eth, char *buffer, size_t buflen) | |
{ | |
struct parser_data *data = (void *) buffer; | |
int parse_res; | |
if (start == NULL) | |
internal_nis_setetherent (); | |
/* Get the next entry until we found a correct one. */ | |
do | |
{ | |
char *p; | |
if (next == NULL) | |
return NSS_STATUS_NOTFOUND; | |
p = strcpy (buffer, next->val); | |
next = next->next; | |
while (isspace (*p)) | |
++p; | |
parse_res = _nss_files_parse_etherent (p, eth, data, buflen); | |
if (!parse_res && errno == ERANGE) | |
return NSS_STATUS_TRYAGAIN; | |
} | |
while (!parse_res); | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_nis_getetherent_r (struct ether *result, char *buffer, size_t buflen) | |
{ | |
int status; | |
__libc_lock_lock (lock); | |
status = internal_nis_getetherent_r (result, buffer, buflen); | |
__libc_lock_unlock (lock); | |
return status; | |
} | |
enum nss_status | |
_nss_nis_gethostton_r (const char *name, struct ether *eth, | |
char *buffer, size_t buflen) | |
{ | |
struct parser_data *data = (void *) buffer; | |
enum nss_status retval; | |
char *domain, *result, *p; | |
int len, parse_res; | |
if (name == NULL) | |
{ | |
__set_errno (EINVAL); | |
return NSS_STATUS_UNAVAIL; | |
} | |
if (yp_get_default_domain (&domain)) | |
return NSS_STATUS_UNAVAIL; | |
retval = yperr2nss (yp_match (domain, "ethers.byname", name, | |
strlen (name), &result, &len)); | |
if (retval != NSS_STATUS_SUCCESS) | |
{ | |
if (retval == NSS_STATUS_TRYAGAIN) | |
__set_errno (EAGAIN); | |
return retval; | |
} | |
if ((size_t) (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_etherent (p, eth, data, buflen); | |
if (!parse_res) | |
{ | |
if (errno == ERANGE) | |
return NSS_STATUS_TRYAGAIN; | |
else | |
return NSS_STATUS_NOTFOUND; | |
} | |
else | |
return NSS_STATUS_SUCCESS; | |
} | |
enum nss_status | |
_nss_nis_getntohost_r (struct ether_addr *addr, struct ether *eth, | |
char *buffer, size_t buflen) | |
{ | |
struct parser_data *data = (void *) buffer; | |
enum nss_status retval; | |
char *domain, *result, *p; | |
int len, nlen, parse_res; | |
char buf[33]; | |
if (addr == NULL) | |
{ | |
__set_errno (EINVAL); | |
return NSS_STATUS_UNAVAIL; | |
} | |
if (yp_get_default_domain (&domain)) | |
return NSS_STATUS_UNAVAIL; | |
nlen = sprintf (buf, "%x:%x:%x:%x:%x:%x", | |
(int) addr->ether_addr_octet[0], | |
(int) addr->ether_addr_octet[1], | |
(int) addr->ether_addr_octet[2], | |
(int) addr->ether_addr_octet[3], | |
(int) addr->ether_addr_octet[4], | |
(int) addr->ether_addr_octet[5]); | |
retval = yperr2nss (yp_match (domain, "ethers.byaddr", buf, | |
nlen, &result, &len)); | |
if (retval != NSS_STATUS_SUCCESS) | |
{ | |
if (retval == NSS_STATUS_TRYAGAIN) | |
__set_errno (EAGAIN); | |
return retval; | |
} | |
if ((size_t) (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_etherent (p, eth, data, buflen); | |
if (!parse_res) | |
{ | |
if (errno == ERANGE) | |
return NSS_STATUS_TRYAGAIN; | |
else | |
return NSS_STATUS_NOTFOUND; | |
} | |
else | |
return NSS_STATUS_SUCCESS; | |
} |