/* Copyright (C) 1997-2005 Luke Howard.
This file is part of the nss_ldap library.
Contributed by Luke Howard, <lukeh@padl.com>, 1997.
The nss_ldap 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 nss_ldap 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 nss_ldap 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.
$Id: ldap-hosts.c,v 2.37 2009/05/26 07:25:12 lukeh Exp $
*/
static char rcsId[] =
"$Id: ldap-hosts.c,v 2.37 2009/05/26 07:25:12 lukeh Exp $";
#include "config.h"
#ifdef HAVE_PORT_BEFORE_H
#include <port_before.h>
#endif
#if defined(HAVE_THREAD_H) && !defined(_AIX)
#include <thread.h>
#elif defined(HAVE_PTHREAD_H)
#include <pthread.h>
#endif
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#ifdef HAVE_ARPA_NAMESER_COMPAT_H
#include <arpa/nameser_compat.h>
#endif
#include <resolv.h>
#ifdef HAVE_LBER_H
#include <lber.h>
#endif
#ifdef HAVE_LDAP_H
#include <ldap.h>
#endif
#ifdef INET6
#include <resolv/mapv4v6addr.h>
#endif
#ifndef MAXALIASES
#define MAXALIASES 35
#endif
#include "ldap-nss.h"
#include "ldap-hosts.h"
#include "util.h"
#ifdef HAVE_PORT_AFTER_H
#include <port_after.h>
#endif
#ifdef HAVE_NSS_H
static ent_context_t *hosts_context = NULL;
#endif
static NSS_STATUS
_nss_ldap_parse_hostv4 (LDAPMessage * e,
ldap_state_t * pvt,
void *result, char *buffer, size_t buflen)
{
return _nss_ldap_parse_host (e, pvt, result, buffer, buflen,
AF_INET);
}
#ifdef INET6
static NSS_STATUS
_nss_ldap_parse_hostv6 (LDAPMessage * e,
ldap_state_t * pvt,
void *result, char *buffer, size_t buflen)
{
return _nss_ldap_parse_host (e, pvt, result, buffer, buflen,
AF_INET6);
}
#endif
static NSS_STATUS
_nss_ldap_parse_host (LDAPMessage * e,
ldap_state_t * pvt,
void *result, char *buffer, size_t buflen,
int af)
{
/* this code needs reviewing. XXX */
struct hostent *host = (struct hostent *) result;
NSS_STATUS stat;
#ifdef INET6
char addressbuf[sizeof ("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") *
MAXALIASES];
#else
char addressbuf[sizeof ("255.255.255.255") * MAXALIASES];
#endif
char *p_addressbuf = addressbuf;
char **addresses = NULL;
size_t addresslen = sizeof (addressbuf);
size_t addresscount = 0;
char **host_addresses = NULL;
int i;
*addressbuf = *buffer = '\0';
stat = _nss_ldap_assign_attrval (e, ATM (LM_HOSTS, cn), &host->h_name,
&buffer, &buflen);
if (stat != NSS_SUCCESS)
return stat;
stat =
_nss_ldap_assign_attrvals (e, ATM (LM_HOSTS, cn), host->h_name,
&host->h_aliases, &buffer, &buflen, NULL);
if (stat != NSS_SUCCESS)
return stat;
stat =
_nss_ldap_assign_attrvals (e, AT (ipHostNumber), NULL, &addresses,
&p_addressbuf, &addresslen, &addresscount);
if (stat != NSS_SUCCESS)
return stat;
if (addresscount == 0)
return NSS_NOTFOUND;
#ifdef INET6
if (af == AF_INET6)
{
if (bytesleft (buffer, buflen, char *) <
(size_t) ((addresscount + 1) * IN6ADDRSZ))
return NSS_TRYAGAIN;
}
else
{
if (bytesleft (buffer, buflen, char *) <
(size_t) ((addresscount + 1) * INADDRSZ))
return NSS_TRYAGAIN;
}
#else
if (bytesleft (buffer, buflen, char *) <
(size_t) ((addresscount + 1) * INADDRSZ))
return NSS_TRYAGAIN;
#endif
align (buffer, buflen, char *);
host_addresses = (char **) buffer;
host->h_addr_list = host_addresses;
host_addresses[addresscount] = NULL;
buffer += (addresscount + 1) * sizeof (char *);
buflen -= (addresscount + 1) * sizeof (char *);
#ifdef INET6
host->h_addrtype = 0;
host->h_length = 0;
#else
host->h_addrtype = AF_INET;
host->h_length = INADDRSZ;
#endif
for (i = 0; i < (int) addresscount; i++)
{
#ifdef INET6
char *addr = addresses[i];
char entdata[16];
/* from glibc NIS parser. Thanks, Uli. */
if (af == AF_INET && inet_pton (AF_INET, addr, entdata) > 0)
{
if (_res.options & RES_USE_INET6)
{
map_v4v6_address ((char *) entdata,
(char *) entdata);
host->h_addrtype = AF_INET6;
host->h_length = IN6ADDRSZ;
}
else
{
host->h_addrtype = AF_INET;
host->h_length = INADDRSZ;
}
}
else if (af == AF_INET6
&& inet_pton (AF_INET6, addr, entdata) > 0)
{
host->h_addrtype = AF_INET6;
host->h_length = IN6ADDRSZ;
}
else
/* Illegal address: ignore line. */
continue;
#else
unsigned long haddr;
haddr = inet_addr (addresses[i]);
#endif
if (buflen < (size_t) host->h_length)
return NSS_TRYAGAIN;
#ifdef INET6
memcpy (buffer, entdata, host->h_length);
*host_addresses = buffer;
buffer += host->h_length;
buflen -= host->h_length;
#else
memcpy (buffer, &haddr, INADDRSZ);
*host_addresses = buffer;
buffer += INADDRSZ;
buflen -= INADDRSZ;
#endif
host_addresses++;
*host_addresses = NULL;
}
#ifdef INET6
/* if host->h_addrtype is not changed, this entry does not
have the right IP address. */
if (host->h_addrtype == 0)
return NSS_NOTFOUND;
#endif
return NSS_SUCCESS;
}
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_gethostbyname_r (nss_backend_t * be, void *args)
{
ldap_args_t a;
NSS_STATUS status;
LA_INIT (a);
LA_STRING (a) = NSS_ARGS (args)->key.name;
LA_TYPE (a) = LA_TYPE_STRING;
status = _nss_ldap_getbyname (&a,
NSS_ARGS (args)->buf.result,
NSS_ARGS (args)->buf.buffer,
NSS_ARGS (args)->buf.buflen,
&NSS_ARGS (args)->erange,
_nss_ldap_filt_gethostbyname,
LM_HOSTS, _nss_ldap_parse_hostv4);
if (status == NSS_SUCCESS)
NSS_ARGS (args)->returnval = NSS_ARGS (args)->buf.result;
MAP_H_ERRNO (status, NSS_ARGS (args)->h_errno);
return status;
}
#elif defined(HAVE_NSS_H)
NSS_STATUS
_nss_ldap_gethostbyname2_r (const char *name, int af, struct hostent * result,
char *buffer, size_t buflen, int *errnop,
int *h_errnop)
{
NSS_STATUS status;
ldap_args_t a;
#ifndef INET6
if (af == AF_INET6)
{
return NSS_NOTFOUND;
}
#endif
LA_INIT (a);
LA_STRING (a) = name;
LA_TYPE (a) = LA_TYPE_STRING;
status = _nss_ldap_getbyname (&a,
result,
buffer,
buflen,
errnop,
_nss_ldap_filt_gethostbyname,
LM_HOSTS,
#ifdef INET6
(af == AF_INET6) ?
_nss_ldap_parse_hostv6 :
#endif
_nss_ldap_parse_hostv4);
MAP_H_ERRNO (status, *h_errnop);
return status;
}
NSS_STATUS
_nss_ldap_gethostbyname_r (const char *name, struct hostent * result,
char *buffer, size_t buflen, int *errnop,
int *h_errnop)
{
return _nss_ldap_gethostbyname2_r (name,
#ifdef INET6
(_res.options & RES_USE_INET6) ?
AF_INET6 :
#endif
AF_INET, result, buffer, buflen,
errnop, h_errnop);
}
#endif
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_gethostbyaddr_r (nss_backend_t * be, void *args)
{
struct in_addr iaddr;
ldap_args_t a;
NSS_STATUS status;
memcpy (&iaddr.s_addr, NSS_ARGS (args)->key.hostaddr.addr,
NSS_ARGS (args)->key.hostaddr.len);
LA_INIT (a);
LA_STRING (a) = inet_ntoa (iaddr);
LA_TYPE (a) = LA_TYPE_STRING;
status = _nss_ldap_getbyname (&a,
NSS_ARGS (args)->buf.result,
NSS_ARGS (args)->buf.buffer,
NSS_ARGS (args)->buf.buflen,
&NSS_ARGS (args)->erange,
_nss_ldap_filt_gethostbyaddr,
LM_HOSTS, _nss_ldap_parse_hostv4);
if (status == NSS_SUCCESS)
NSS_ARGS (args)->returnval = NSS_ARGS (args)->buf.result;
MAP_H_ERRNO (status, NSS_ARGS (args)->h_errno);
return status;
}
#elif defined(HAVE_NSS_H)
NSS_STATUS
_nss_ldap_gethostbyaddr_r (struct in_addr * addr, int len, int type,
struct hostent * result, char *buffer,
size_t buflen, int *errnop, int *h_errnop)
{
NSS_STATUS status;
ldap_args_t a;
/* if querying by IPv6 address, make sure the address is "normalized" --
* it should contain no leading zeros and all components of the address.
* still we can't fit an IPv6 address in an int, so who cares for now.
*/
LA_INIT (a);
LA_STRING (a) = inet_ntoa (*addr);
LA_TYPE (a) = LA_TYPE_STRING;
status = _nss_ldap_getbyname (&a,
result,
buffer,
buflen,
errnop,
_nss_ldap_filt_gethostbyaddr,
LM_HOSTS,
#ifdef INET6
(type == AF_INET6) ?
_nss_ldap_parse_hostv6 :
#endif
_nss_ldap_parse_hostv4);
MAP_H_ERRNO (status, *h_errnop);
return status;
}
#endif
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_sethostent_r (nss_backend_t * hosts_context, void *fakeargs)
#elif defined(HAVE_NSS_H)
NSS_STATUS _nss_ldap_sethostent (void)
#endif
#if defined(HAVE_NSS_H) || defined(HAVE_NSSWITCH_H)
{
LOOKUP_SETENT (hosts_context);
}
#endif
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_endhostent_r (nss_backend_t * hosts_context, void *fakeargs)
#elif defined(HAVE_NSS_H)
NSS_STATUS _nss_ldap_endhostent (void)
#endif
#if defined(HAVE_NSS_H) || defined(HAVE_NSSWITCH_H)
{
LOOKUP_ENDENT (hosts_context);
}
#endif
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_gethostent_r (nss_backend_t * hosts_context, void *args)
{
NSS_STATUS status = _nss_ldap_getent (&((nss_ldap_backend_t *)
hosts_context)->state,
NSS_ARGS (args)->buf.result,
NSS_ARGS (args)->buf.buffer,
NSS_ARGS (args)->buf.buflen,
&NSS_ARGS (args)->erange,
_nss_ldap_filt_gethostent,
LM_HOSTS,
_nss_ldap_parse_hostv4);
if (status == NSS_SUCCESS)
NSS_ARGS (args)->returnval = NSS_ARGS (args)->buf.result;
MAP_H_ERRNO (status, NSS_ARGS (args)->h_errno);
return status;
}
#elif defined(HAVE_NSS_H)
NSS_STATUS
_nss_ldap_gethostent_r (struct hostent * result, char *buffer, size_t buflen,
int *errnop, int *h_errnop)
{
NSS_STATUS status;
status = _nss_ldap_getent (&hosts_context,
result,
buffer,
buflen,
errnop,
_nss_ldap_filt_gethostent, LM_HOSTS,
#ifdef INET6
(_res.options & RES_USE_INET6) ?
_nss_ldap_parse_hostv6 :
#endif
_nss_ldap_parse_hostv4);
MAP_H_ERRNO (status, *h_errnop);
return status;
}
#endif
#ifdef HAVE_NSSWITCH_H
static NSS_STATUS
_nss_ldap_hosts_destr (nss_backend_t * hosts_context, void *args)
{
return _nss_ldap_default_destr (hosts_context, args);
}
static nss_backend_op_t host_ops[] = {
_nss_ldap_hosts_destr,
_nss_ldap_endhostent_r,
_nss_ldap_sethostent_r,
_nss_ldap_gethostent_r,
_nss_ldap_gethostbyname_r,
_nss_ldap_gethostbyaddr_r
};
nss_backend_t *
_nss_ldap_hosts_constr (const char *db_name,
const char *src_name, const char *cfg_args)
{
nss_ldap_backend_t *be;
if (!(be = (nss_ldap_backend_t *) malloc (sizeof (*be))))
return NULL;
be->ops = host_ops;
be->n_ops = sizeof (host_ops) / sizeof (nss_backend_op_t);
if (_nss_ldap_default_constr (be) != NSS_SUCCESS)
return NULL;
return (nss_backend_t *) be;
}
#endif /* !HAVE_NSS_H */
#ifdef HAVE_IRS_H
#include "irs-hosts.c"
#endif