getnode.c revision 2830:5228d1267a01 
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 getipnode* calls in nscd. Note that the
30 * getnodeby* APIs were renamed getipnodeby*. The interfaces
31 * related to them in the nscd will remain as getnode*.
32 */
33
34#include <stdlib.h>
35#include <string.h>
36#include <strings.h>
37#include <sys/types.h>
38#include <sys/socket.h>
39#include <netinet/in.h>
40#include <arpa/inet.h>
41#include <inet/ip6.h>
42#include "cache.h"
43
44static int ipaddr_compar(const void *, const void *);
45static uint_t ipaddr_gethash(nss_XbyY_key_t *, int);
46static void ipaddr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
47
48static int ipname_compar(const void *, const void *);
49static uint_t ipname_gethash(nss_XbyY_key_t *, int);
50static void ipname_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
51
52#define	nnam_db	ctx->nsc_db[0]
53#define	addr_db	ctx->nsc_db[1]
54
55#define	NSC_NAME_IPNODES_BYNAME	"getipnodebyname"
56#define	NSC_NAME_IPNODES_BYADDR	"getipnodebyaddr"
57
58void
59ipnode_init_ctx(nsc_ctx_t *ctx) {
60	ctx->dbname = NSS_DBNAM_IPNODES;
61	ctx->file_name = "/etc/inet/ipnodes";
62	ctx->db_count = 2;
63	nnam_db = make_cache(nsc_key_other,
64			NSS_DBOP_IPNODES_BYNAME,
65			NSC_NAME_IPNODES_BYNAME,
66			ipname_compar,
67			ipname_getlogstr,
68			ipname_gethash, nsc_ht_default, -1);
69
70	addr_db = make_cache(nsc_key_other,
71			NSS_DBOP_IPNODES_BYADDR,
72			NSC_NAME_IPNODES_BYADDR,
73			ipaddr_compar,
74			ipaddr_getlogstr,
75			ipaddr_gethash, nsc_ht_default, -1);
76}
77
78static int
79ipaddr_compar(const void *n1, const void *n2) {
80	nsc_entry_t	*e1, *e2;
81	int		res, l1, l2;
82
83	e1 = (nsc_entry_t *)n1;
84	e2 = (nsc_entry_t *)n2;
85
86	if (e1->key.hostaddr.type > e2->key.hostaddr.type)
87		return (1);
88	else if (e1->key.hostaddr.type < e2->key.hostaddr.type)
89		return (-1);
90
91	l1 = e1->key.hostaddr.len;
92	l2 = e2->key.hostaddr.len;
93	res = memcmp(e1->key.hostaddr.addr, e2->key.hostaddr.addr,
94		(l2 > l1)?l1:l2);
95	return ((res) ? _NSC_INT_KEY_CMP(res, 0) : _NSC_INT_KEY_CMP(l1, l2));
96}
97
98static uint_t
99ipaddr_gethash(nss_XbyY_key_t *key, int htsize) {
100	return (db_gethash(key->hostaddr.addr,
101		key->hostaddr.len, htsize));
102}
103
104static void
105ipaddr_getlogstr(char *name, char *whoami, size_t len, nss_XbyY_args_t *argp) {
106	char addr[INET6_ADDRSTRLEN];
107
108	if (inet_ntop(argp->key.hostaddr.type, argp->key.hostaddr.addr, addr,
109			sizeof (addr)) == NULL) {
110		(void) snprintf(whoami, len, "%s", name);
111	} else {
112		(void) snprintf(whoami, len, "%s [key=%s addrtype=%d]",
113			name,
114			addr, argp->key.hostaddr.type);
115	}
116}
117
118static int
119ipname_compar(const void *n1, const void *n2) {
120	nsc_entry_t	*e1, *e2;
121	int		res, l1, l2;
122
123	e1 = (nsc_entry_t *)n1;
124	e2 = (nsc_entry_t *)n2;
125
126	if (e1->key.ipnode.af_family > e2->key.ipnode.af_family)
127		return (1);
128	else if (e1->key.ipnode.af_family < e2->key.ipnode.af_family)
129		return (-1);
130
131	l1 = strlen(e1->key.ipnode.name);
132	l2 = strlen(e2->key.ipnode.name);
133	res = strncasecmp(e1->key.ipnode.name, e2->key.ipnode.name,
134		(l1 > l2)?l1:l2);
135	return (_NSC_INT_KEY_CMP(res, 0));
136}
137
138static uint_t
139ipname_gethash(nss_XbyY_key_t *key, int htsize) {
140	return (cis_gethash(key->ipnode.name, htsize));
141}
142
143static void
144ipname_getlogstr(char *name, char *whoami, size_t len, nss_XbyY_args_t *argp) {
145	(void) snprintf(whoami, len, "%s [key=%s:af=%d:flags=%d]",
146			name,
147			argp->key.ipnode.name,
148			argp->key.ipnode.af_family,
149			argp->key.ipnode.flags);
150}
151