usr/src/lib/nsswitch/ldap/common/getether.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <net/if.h>
  31 #include <netinet/in.h>
  32 #include <net/if_arp.h>
  33 #include <netinet/if_ether.h>
  34 #include "ldap_common.h"
  35
  36 /* ether attributes filters */
  37 #define _E_HOSTNAME             "cn"
  38 #define _E_MACADDRESS           "macaddress"
  39 #define _F_GETETHERBYHOST       "(&(objectClass=ieee802Device)(cn=%s))"
  40 #define _F_GETETHERBYHOST_SSD   "(&(%%s)(cn=%s))"
  41 #define _F_GETETHERBYETHER      "(&(objectClass=ieee802Device)(macAddress=%s))"
  42 #define _F_GETETHERBYETHER_SSD  "(&(%%s)(macAddress=%s))"
  43
  44 static const char *ethers_attrs[] = {
  45         _E_HOSTNAME,
  46         _E_MACADDRESS,
  47         NULL
  48 };
  49
  50 /*
  51  * _nss_ldap_ethers2str is the data marshaling method for the ethers
  52  * ether_hostton/ether_ntohost backend processes.
  53  * This method is called after a successful ldap search has been performed.
  54  * This method will parse the ldap search values into the file format.
  55  * e.g.
  56  *
  57  * 8:0:20:8e:eb:8a8 borealis
  58  *
  59  * The front end marshaller str2ether uses argp->buf.result for a different
  60  * purpose so a flag be->db_type is set to work around this oddity.
  61  *
  62  */
  63 /*ARGSUSED0*/
  64 static int
  65 _nss_ldap_ethers2str(ldap_backend_ptr be, nss_XbyY_args_t *argp)
  66 {
  67         int                     nss_result;
  68         ns_ldap_result_t        *result = be->result;
  69         char                    **host, **macaddress;
  70
  71         if (result == NULL)
  72                 return (NSS_STR_PARSE_PARSE);
  73         nss_result = NSS_STR_PARSE_SUCCESS;
  74
  75         host = __ns_ldap_getAttr(result->entry, _E_HOSTNAME);
  76         if (host == NULL || host[0] == NULL || (strlen(host[0]) < 1)) {
  77                         nss_result = NSS_STR_PARSE_PARSE;
  78                         goto result_ea2str;
  79         }
  80         macaddress = __ns_ldap_getAttr(result->entry, _E_MACADDRESS);
  81         if (macaddress == NULL || macaddress[0] == NULL ||
  82                                 (strlen(macaddress[0]) < 1)) {
  83                         nss_result = NSS_STR_PARSE_PARSE;
  84                         goto result_ea2str;
  85         }
  86         be->buflen = strlen(host[0]) + strlen(macaddress[0]) + 1; /* ' ' */
  87         /* Add a trailing null for easy debug */
  88         be->buffer = calloc(1, be->buflen + 1);
  89         if (be->buffer == NULL) {
  90                 nss_result = NSS_STR_PARSE_PARSE;
  91                 goto result_ea2str;
  92         }
  93
  94         (void) snprintf(be->buffer, be->buflen + 1, "%s %s",
  95                         macaddress[0], host[0]);
  96         be->db_type = NSS_LDAP_DB_ETHERS;
  97
  98 result_ea2str:
  99
 100         (void) __ns_ldap_freeResult(&be->result);
 101         return (nss_result);
 102 }
 103
 104 /*
 105  * getbyhost gets an ethernet address by hostname. This function
 106  * constructs an ldap search filter using the hostname invocation
 107  * parameter and the getetherbyhost search filter defined. Once
 108  * the filter is constructed, we search for a matching entry and
 109  * marshal the data results into uchar_t *ether for the frontend
 110  * process. The function _nss_ldap_ethers2ent performs the data
 111  * marshaling.
 112  *
 113  * RFC 2307, An Approach for Using LDAP as a Network Information Service,
 114  * indicates that dn's be fully qualified. Host name searches will be on
 115  * fully qualified host names (e.g., foo.bar.sun.com).
 116  */
 117
 118 static nss_status_t
 119 getbyhost(ldap_backend_ptr be, void *a)
 120 {
 121         char            hostname[3 * MAXHOSTNAMELEN];
 122         nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
 123         char            searchfilter[SEARCHFILTERLEN];
 124         char            userdata[SEARCHFILTERLEN];
 125         int             ret;
 126         nss_status_t    rc;
 127
 128         if (_ldap_filter_name(hostname, argp->key.name, sizeof (hostname)) != 0)
 129                 return ((nss_status_t)NSS_NOTFOUND);
 130
 131         ret = snprintf(searchfilter, sizeof (searchfilter),
 132             _F_GETETHERBYHOST, hostname);
 133
 134         if (ret >= sizeof (searchfilter) || ret < 0)
 135                 return ((nss_status_t)NSS_NOTFOUND);
 136
 137         ret = snprintf(userdata, sizeof (userdata),
 138             _F_GETETHERBYHOST_SSD, hostname);
 139
 140         if (ret >= sizeof (userdata) || ret < 0)
 141                 return ((nss_status_t)NSS_NOTFOUND);
 142
 143         rc = (nss_status_t)_nss_ldap_lookup(be, argp,
 144                 _ETHERS, searchfilter, NULL,
 145                 _merge_SSD_filter, userdata);
 146
 147         return (rc);
 148 }
 149
 150
 151 /*
 152  * getbyether gets an ethernet address by ethernet address. This
 153  * function constructs an ldap search filter using the ASCII
 154  * ethernet address invocation parameter and the getetherbyether
 155  * search filter defined. Once the filter is constructed, we
 156  * search for a matching entry and  marshal the data results into
 157  * uchar_t *ether for the frontend process. The function
 158  * _nss_ldap_ethers2ent performs the data marshaling.
 159  */
 160
 161 static nss_status_t
 162 getbyether(ldap_backend_ptr be, void *a)
 163 {
 164         nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
 165         char            etherstr[18];
 166         uchar_t *e = argp->key.ether;
 167         char            searchfilter[SEARCHFILTERLEN];
 168         char            userdata[SEARCHFILTERLEN];
 169         int             ret;
 170
 171         ret = snprintf(etherstr, sizeof (etherstr), "%x:%x:%x:%x:%x:%x",
 172             *e, *(e + 1), *(e + 2), *(e + 3), *(e + 4), *(e + 5));
 173         if (ret >= sizeof (etherstr) || ret < 0)
 174                 return ((nss_status_t)NSS_NOTFOUND);
 175
 176         ret = snprintf(searchfilter, sizeof (searchfilter),
 177             _F_GETETHERBYETHER, etherstr);
 178         if (ret >= sizeof (searchfilter) || ret < 0)
 179                 return ((nss_status_t)NSS_NOTFOUND);
 180
 181         ret = snprintf(userdata, sizeof (userdata),
 182             _F_GETETHERBYETHER_SSD, etherstr);
 183         if (ret >= sizeof (userdata) || ret < 0)
 184                 return ((nss_status_t)NSS_NOTFOUND);
 185
 186         return ((nss_status_t)_nss_ldap_lookup(be, argp,
 187                 _ETHERS, searchfilter, NULL,
 188                 _merge_SSD_filter, userdata));
 189 }
 190
 191
 192 static ldap_backend_op_t ethers_ops[] = {
 193         _nss_ldap_destr,
 194         getbyhost,
 195         getbyether
 196 };
 197
 198
 199 /*
 200  * _nss_ldap_ethers_constr is where life begins. This function calls the
 201  * generic ldap constructor function to define and build the abstract
 202  * data types required to support ldap operations.
 203  */
 204
 205 /*ARGSUSED0*/
 206 nss_backend_t *
 207 _nss_ldap_ethers_constr(const char *dummy1, const char *dummy2,
 208                         const char *dummy3)
 209 {
 210
 211         return ((nss_backend_t *)_nss_ldap_constr(ethers_ops,
 212                 sizeof (ethers_ops)/sizeof (ethers_ops[0]), _ETHERS,
 213                 ethers_attrs, _nss_ldap_ethers2str));
 214 }