getserv.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 getserv* calls in nscd
30 */
31
32#include <strings.h>
33#include "cache.h"
34
35
36#define	name_db	ctx->nsc_db[0]
37#define	port_db	ctx->nsc_db[1]
38
39#define	NSC_NAME_SERVICES_BYNAME	"getservbyname"
40#define	NSC_NAME_SERVICES_BYPORT	"getservbyport"
41
42static void servname_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
43static int servname_compar(const void *, const void *);
44static uint_t servname_gethash(nss_XbyY_key_t *, int);
45
46static void servport_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
47static int servport_compar(const void *, const void *);
48static uint_t servport_gethash(nss_XbyY_key_t *, int);
49
50void
51serv_init_ctx(nsc_ctx_t *ctx) {
52	ctx->dbname = NSS_DBNAM_SERVICES;
53	ctx->file_name = "/etc/services";
54	ctx->db_count = 2;
55	name_db = make_cache(nsc_key_other,
56			NSS_DBOP_SERVICES_BYNAME,
57			NSC_NAME_SERVICES_BYNAME,
58			servname_compar,
59			servname_getlogstr,
60			servname_gethash, nsc_ht_default, -1);
61
62	port_db = make_cache(nsc_key_other,
63			NSS_DBOP_SERVICES_BYPORT,
64			NSC_NAME_SERVICES_BYPORT,
65			servport_compar,
66			servport_getlogstr,
67			servport_gethash, nsc_ht_default, -1);
68}
69
70static int
71servname_compar(const void *n1, const void *n2) {
72	nsc_entry_t	*e1, *e2;
73	int		res, l1, l2;
74
75	e1 = (nsc_entry_t *)n1;
76	e2 = (nsc_entry_t *)n2;
77
78	/* compare protocol */
79	if (e1->key.serv.proto == NULL && e2->key.serv.proto)
80		return (-1);
81	if (e1->key.serv.proto && e2->key.serv.proto == NULL)
82		return (1);
83	if (e1->key.serv.proto) {
84		l1 = strlen(e1->key.serv.proto);
85		l2 = strlen(e2->key.serv.proto);
86		res = strncmp(e1->key.serv.proto, e2->key.serv.proto,
87			(l1 > l2)?l1:l2);
88		if (res > 0)
89			return (1);
90		if (res < 0)
91			return (-1);
92	}
93
94	/* compare service name */
95	l1 = strlen(e1->key.serv.serv.name);
96	l2 = strlen(e2->key.serv.serv.name);
97	res = strncmp(e1->key.serv.serv.name, e2->key.serv.serv.name,
98			(l1 > l2)?l1:l2);
99	return (_NSC_INT_KEY_CMP(res, 0));
100}
101
102static uint_t
103servname_gethash(nss_XbyY_key_t *key, int htsize) {
104	return (ces_gethash(key->serv.serv.name, htsize));
105}
106
107static void
108servname_getlogstr(char *name, char *whoami, size_t len,
109			nss_XbyY_args_t *argp) {
110	(void) snprintf(whoami, len, "%s [key=%s, %s]",
111			name,
112			argp->key.serv.serv.name,
113			check_null(argp->key.serv.proto));
114}
115
116static int
117servport_compar(const void *n1, const void *n2) {
118	nsc_entry_t	*e1, *e2;
119	int		res, l1, l2;
120
121	e1 = (nsc_entry_t *)n1;
122	e2 = (nsc_entry_t *)n2;
123
124	/* compare protocol */
125	if (e1->key.serv.proto == NULL && e2->key.serv.proto)
126		return (-1);
127	if (e1->key.serv.proto && e2->key.serv.proto == NULL)
128		return (1);
129	if (e1->key.serv.proto) {
130		l1 = strlen(e1->key.serv.proto);
131		l2 = strlen(e2->key.serv.proto);
132		res = strncmp(e1->key.serv.proto, e2->key.serv.proto,
133				(l1 > l2)?l1:l2);
134		if (res > 0)
135			return (1);
136		if (res < 0)
137			return (-1);
138	}
139
140	/* compare port */
141	return (_NSC_INT_KEY_CMP(e1->key.serv.serv.port,
142			e2->key.serv.serv.port));
143}
144
145static uint_t
146servport_gethash(nss_XbyY_key_t *key, int htsize) {
147	return (db_gethash(&key->serv.serv.port,
148			sizeof (key->serv.serv.port), htsize));
149}
150
151static void
152servport_getlogstr(char *name, char *whoami, size_t len,
153			nss_XbyY_args_t *argp) {
154	(void) snprintf(whoami, len, "%s [key=%d, %s]",
155			name,
156			argp->key.serv.serv.port,
157			check_null(argp->key.serv.proto));
158}
159