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 /*
27 * Routines to handle gethost* calls in nscd
28 */
29
30 #include <string.h>
31 #include <stdlib.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <arpa/inet.h>
36 #include "cache.h"
37
38 #define hnam_db ctx->nsc_db[0]
39 #define addr_db ctx->nsc_db[1]
40
41 #define NSC_NAME_HOSTS_BYNAME "gethostbyname"
42 #define NSC_NAME_HOSTS_BYADDR "gethostbyaddr"
43
44 static int hostaddr_compar(const void *, const void *);
45 static uint_t hostaddr_gethash(nss_XbyY_key_t *, int);
46 static void hostaddr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
47
48 void
host_init_ctx(nsc_ctx_t * ctx)49 host_init_ctx(nsc_ctx_t *ctx) {
50 ctx->dbname = NSS_DBNAM_HOSTS;
51 ctx->db_count = 2;
52 ctx->file_name = "/etc/inet/hosts";
53
54 hnam_db = make_cache(nsc_key_cis,
55 NSS_DBOP_HOSTS_BYNAME,
56 NSC_NAME_HOSTS_BYNAME,
57 NULL, NULL, NULL, nsc_ht_default, -1);
58
59 addr_db = make_cache(nsc_key_other,
60 NSS_DBOP_HOSTS_BYADDR,
61 NSC_NAME_HOSTS_BYADDR,
62 hostaddr_compar,
63 hostaddr_getlogstr,
64 hostaddr_gethash, nsc_ht_default, -1);
65 }
66
67 static void
hostaddr_getlogstr(char * name,char * whoami,size_t len,nss_XbyY_args_t * argp)68 hostaddr_getlogstr(char *name, char *whoami, size_t len,
69 nss_XbyY_args_t *argp) {
70 char addr[INET6_ADDRSTRLEN];
71
72 if (inet_ntop(argp->key.hostaddr.type, argp->key.hostaddr.addr, addr,
73 sizeof (addr)) == NULL) {
74 (void) snprintf(whoami, len, "%s", name);
75 } else {
76 (void) snprintf(whoami, len, "%s [key=%s, addrtype=%d]",
77 name, addr, argp->key.hostaddr.type);
78 }
79 }
80
81 static int
hostaddr_compar(const void * n1,const void * n2)82 hostaddr_compar(const void *n1, const void *n2) {
83 nsc_entry_t *e1, *e2;
84 int res, l1, l2;
85
86 e1 = (nsc_entry_t *)n1;
87 e2 = (nsc_entry_t *)n2;
88 l1 = e1->key.hostaddr.len;
89 l2 = e2->key.hostaddr.len;
90 res = memcmp(e1->key.hostaddr.addr, e2->key.hostaddr.addr,
91 (l2 > l1)?l1:l2);
92 return ((res) ? _NSC_INT_KEY_CMP(res, 0) : _NSC_INT_KEY_CMP(l1, l2));
93 }
94
95 static uint_t
hostaddr_gethash(nss_XbyY_key_t * key,int htsize)96 hostaddr_gethash(nss_XbyY_key_t *key, int htsize) {
97 return (db_gethash(key->hostaddr.addr,
98 key->hostaddr.len, htsize));
99 }
100