usr/src/cmd/nscd/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 /*
  29  * Routines to handle ether_*to* calls in nscd
  30  */
  31
  32 #include <stdlib.h>
  33 #include <net/if.h>
  34 #include <netinet/in.h>
  35 #include <netinet/if_ether.h>
  36 #include <string.h>
  37 #include "cache.h"
  38
  39 #define host_db ctx->nsc_db[0]
  40 #define addr_db ctx->nsc_db[1]
  41
  42 #define NSC_NAME_ETHERS_HOSTTON "ether_hostton"
  43 #define NSC_NAME_ETHERS_NTOHOST "ether_ntohost"
  44
  45 static void ether_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
  46 static int ether_compar(const void *, const void *);
  47 static uint_t ether_gethash(nss_XbyY_key_t *, int);
  48
  49 void
  50 ether_init_ctx(nsc_ctx_t *ctx) {
  51         ctx->dbname = NSS_DBNAM_ETHERS;
  52         ctx->file_name = "/etc/ethers";
  53         ctx->db_count = 2;
  54         host_db = make_cache(nsc_key_cis,
  55                         NSS_DBOP_ETHERS_HOSTTON,
  56                         NSC_NAME_ETHERS_HOSTTON,
  57                         NULL, NULL, NULL, nsc_ht_default, -1);
  58
  59         addr_db = make_cache(nsc_key_other,
  60                         NSS_DBOP_ETHERS_NTOHOST,
  61                         NSC_NAME_ETHERS_NTOHOST,
  62                         ether_compar,
  63                         ether_getlogstr,
  64                         ether_gethash, nsc_ht_default, -1);
  65 }
  66
  67 static int
  68 ether_compar(const void *n1, const void *n2) {
  69         nsc_entry_t     *e1, *e2;
  70         int             res;
  71
  72         e1 = (nsc_entry_t *)n1;
  73         e2 = (nsc_entry_t *)n2;
  74         if (ether_cmp(e1->key.ether, e2->key.ether) != 0) {
  75                 res = memcmp(e1->key.ether, e2->key.ether,
  76                         sizeof (struct ether_addr));
  77                 return (_NSC_INT_KEY_CMP(res, 0));
  78         }
  79         return (0);
  80 }
  81
  82 static uint_t
  83 ether_gethash(nss_XbyY_key_t *key, int htsize) {
  84         return (db_gethash(key->ether, sizeof (struct ether_addr),
  85                         htsize));
  86 }
  87
  88 static void
  89 ether_getlogstr(char *name, char *whoami, size_t len, nss_XbyY_args_t *argp) {
  90         struct ether_addr *e;
  91         e = (struct ether_addr *)argp->key.ether;
  92         (void) snprintf(whoami, len, "%s [key=%x:%x:%x:%x:%x:%x]",
  93                         name,
  94                         e->ether_addr_octet[0], e->ether_addr_octet[1],
  95                         e->ether_addr_octet[2], e->ether_addr_octet[3],
  96                         e->ether_addr_octet[4], e->ether_addr_octet[5]);
  97 }