/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <net/if_arp.h>
#include <netinet/if_ether.h>
#include "ldap_common.h"
/* ether attributes filters */
#define _E_HOSTNAME "cn"
#define _E_MACADDRESS "macaddress"
#define _F_GETETHERBYHOST "(&(objectClass=ieee802Device)(cn=%s))"
#define _F_GETETHERBYHOST_SSD "(&(%%s)(cn=%s))"
#define _F_GETETHERBYETHER "(&(objectClass=ieee802Device)(macAddress=%s))"
#define _F_GETETHERBYETHER_SSD "(&(%%s)(macAddress=%s))"
static const char *ethers_attrs[] = {
_E_HOSTNAME,
_E_MACADDRESS,
(char *)NULL
};
/*
* _nss_ldap_ethers2ent is the data marshaling method for the ethers
* getXbyY * (e.g., getbyhost(), getbyether()) backend processes. This
* method is called after a successful ldap search has been performed.
* This method will parse the ldap search values into uchar_t *ether
* = argp->buf.buffer which the frontend process expects. Three error
* conditions are expected and returned to nsswitch.
*
* Place the resulting struct ether_addr from the ldap query into
* argp->buf.result only if argp->buf.result is initialized (not NULL).
* e.g., it happens for the call ether_hostton.
*
* Place the resulting hostname into argp->buf.buffer only if
* argp->buf.buffer is initialized. I.e. it happens for the call
* ether_ntohost.
*
* argp->buf.buflen does not make sense for ethers. It is always set
* to 0 by the frontend. The caller only passes a hostname pointer in
* case of ether_ntohost, that is assumed to be big enough. For
* ether_hostton, the struct ether_addr passed is a fixed size.
*
* The interface does not let the caller specify how long is the buffer
* pointed by host. We make a safe assumption that the callers will
* always give MAXHOSTNAMELEN. In any case, it is the only finite number
* we can lay our hands on in case of runaway strings, memory corruption etc.
*/
static int
_nss_ldap_ethers2ent(ldap_backend_ptr be, nss_XbyY_args_t *argp)
{
int i, ip;
int nss_result;
int buflen = (int)0;
unsigned int t[ETHERADDRL];
unsigned long len = 0L;
char *host = NULL;
struct ether_addr *ether = NULL;
ns_ldap_result_t *result = be->result;
ns_ldap_attr_t *attrptr;
int etherflag = 0, hostflag = 0;
if (argp->buf.buffer) {
hostflag = 1;
host = argp->buf.buffer;
}
buflen = (size_t)argp->buf.buflen;
if (argp->buf.result) {
etherflag = 1;
ether = (struct ether_addr *)argp->buf.result;
}
nss_result = (int)NSS_STR_PARSE_SUCCESS;
(void) memset(argp->buf.buffer, 0, buflen);
attrptr = getattr(result, 0);
if (attrptr == NULL) {
nss_result = (int)NSS_STR_PARSE_PARSE;
goto result_ea2ent;
}
for (i = 0; i < result->entry->attr_count; i++) {
attrptr = getattr(result, i);
if (attrptr == NULL) {
nss_result = (int)NSS_STR_PARSE_PARSE;
goto result_ea2ent;
}
if (hostflag) {
if (strcasecmp(attrptr->attrname, _E_HOSTNAME) == 0) {
if ((attrptr->attrvalue[0] == NULL) ||
(len = strlen(attrptr->attrvalue[0])) < 1) {
nss_result = (int)NSS_STR_PARSE_PARSE;
goto result_ea2ent;
}
if (len > MAXHOSTNAMELEN) {
nss_result = (int)NSS_STR_PARSE_ERANGE;
goto result_ea2ent;
}
(void) strcpy(host, attrptr->attrvalue[0]);
continue;
}
}
if (etherflag) {
if (strcasecmp(attrptr->attrname, _E_MACADDRESS) == 0) {
if ((attrptr->attrvalue[0] == NULL) ||
(len = strlen(attrptr->attrvalue[0])) < 1) {
nss_result = (int)NSS_STR_PARSE_PARSE;
goto result_ea2ent;
}
ip = (int)sscanf(attrptr->attrvalue[0],
"%x:%x:%x:%x:%x:%x", &t[0], &t[1],
&t[2], &t[3], &t[4], &t[5]);
if (ip != ETHERADDRL) {
nss_result = (int)NSS_STR_PARSE_PARSE;
goto result_ea2ent;
}
for (ip = 0; ip < ETHERADDRL; ip++)
ether->ether_addr_octet[ip] =
(uchar_t)t[ip];
continue;
}
}
}
#ifdef DEBUG
(void) fprintf(stdout, "\n[ether_addr.c: _nss_ldap_ethers2ent]\n");
if (host != NULL)
(void) fprintf(stdout, " hostname: [%s]\n", host);
if (ether != NULL)
(void) fprintf(stdout,
" ether_addr: [%x:%x:%x:%x:%x:%x]\n",
ether->ether_addr_octet[0],
ether->ether_addr_octet[1],
ether->ether_addr_octet[2],
ether->ether_addr_octet[3],
ether->ether_addr_octet[4],
ether->ether_addr_octet[5]);
#endif /* DEBUG */
result_ea2ent:
(void) __ns_ldap_freeResult(&be->result);
return ((int)nss_result);
}
/*
* getbyhost gets an ethernet address by hostname. This function
* constructs an ldap search filter using the hostname invocation
* parameter and the getetherbyhost search filter defined. Once
* the filter is constructed, we search for a matching entry and
* marshal the data results into uchar_t *ether for the frontend
* process. The function _nss_ldap_ethers2ent performs the data
* marshaling.
*
* RFC 2307, An Approach for Using LDAP as a Network Information Service,
* indicates that dn's be fully qualified. Host name searches will be on
* fully qualified host names (e.g., foo.bar.sun.com).
*/
static nss_status_t
getbyhost(ldap_backend_ptr be, void *a)
{
char hostname[3 * MAXHOSTNAMELEN];
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
char searchfilter[SEARCHFILTERLEN];
char userdata[SEARCHFILTERLEN];
int ret;
if (_ldap_filter_name(hostname, argp->key.name, sizeof (hostname)) != 0)
return ((nss_status_t)NSS_NOTFOUND);
ret = snprintf(searchfilter, sizeof (searchfilter),
_F_GETETHERBYHOST, hostname);
if (ret >= sizeof (searchfilter) || ret < 0)
return ((nss_status_t)NSS_NOTFOUND);
ret = snprintf(userdata, sizeof (userdata),
_F_GETETHERBYHOST_SSD, hostname);
if (ret >= sizeof (userdata) || ret < 0)
return ((nss_status_t)NSS_NOTFOUND);
return ((nss_status_t)_nss_ldap_lookup(be, argp,
_ETHERS, searchfilter, NULL,
_merge_SSD_filter, userdata));
}
/*
* getbyether gets an ethernet address by ethernet address. This
* function constructs an ldap search filter using the ASCII
* ethernet address invocation parameter and the getetherbyether
* search filter defined. Once the filter is constructed, we
* search for a matching entry and marshal the data results into
* uchar_t *ether for the frontend process. The function
* _nss_ldap_ethers2ent performs the data marshaling.
*/
static nss_status_t
getbyether(ldap_backend_ptr be, void *a)
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
char etherstr[18];
uchar_t *e = argp->key.ether;
char searchfilter[SEARCHFILTERLEN];
char userdata[SEARCHFILTERLEN];
int ret;
ret = snprintf(etherstr, sizeof (etherstr), "%x:%x:%x:%x:%x:%x",
*e, *(e + 1), *(e + 2), *(e + 3), *(e + 4), *(e + 5));
if (ret >= sizeof (etherstr) || ret < 0)
return ((nss_status_t)NSS_NOTFOUND);
ret = snprintf(searchfilter, sizeof (searchfilter),
_F_GETETHERBYETHER, etherstr);
if (ret >= sizeof (searchfilter) || ret < 0)
return ((nss_status_t)NSS_NOTFOUND);
ret = snprintf(userdata, sizeof (userdata),
_F_GETETHERBYETHER_SSD, etherstr);
if (ret >= sizeof (userdata) || ret < 0)
return ((nss_status_t)NSS_NOTFOUND);
return ((nss_status_t)_nss_ldap_lookup(be, argp,
_ETHERS, searchfilter, NULL,
_merge_SSD_filter, userdata));
}
static ldap_backend_op_t ethers_ops[] = {
_nss_ldap_destr,
getbyhost,
getbyether
};
/*
* _nss_ldap_ethers_constr is where life begins. This function calls the
* generic ldap constructor function to define and build the abstract
* data types required to support ldap operations.
*/
/*ARGSUSED0*/
nss_backend_t *
_nss_ldap_ethers_constr(const char *dummy1, const char *dummy2,
const char *dummy3)
{
return ((nss_backend_t *)_nss_ldap_constr(ethers_ops,
sizeof (ethers_ops)/sizeof (ethers_ops[0]), _ETHERS,
ethers_attrs, _nss_ldap_ethers2ent));
}