1/*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996-1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#if !defined(LINT) && !defined(CODECENTER)
19static const char rcsid[] = "$Id: lcl.c,v 1.4 2005/04/27 04:56:30 sra Exp $";
20#endif
21
22/* Imports */
23
24#include "port_before.h"
25
26#include <stdlib.h>
27#include <errno.h>
28#include <string.h>
29
30#include <sys/types.h>
31#include <netinet/in.h>
32#include <arpa/nameser.h>
33#include <resolv.h>
34
35#include <isc/memcluster.h>
36
37#include <irs.h>
38
39#include "port_after.h"
40
41#include "irs_p.h"
42#include "lcl_p.h"
43
44/* Forward. */
45
46static void		lcl_close(struct irs_acc *);
47static struct __res_state *	lcl_res_get(struct irs_acc *);
48static void		lcl_res_set(struct irs_acc *, struct __res_state *,
49				void (*)(void *));
50
51/* Public */
52
53struct irs_acc *
54irs_lcl_acc(const char *options) {
55	struct irs_acc *acc;
56	struct lcl_p *lcl;
57
58	UNUSED(options);
59
60	if (!(acc = memget(sizeof *acc))) {
61		errno = ENOMEM;
62		return (NULL);
63	}
64	memset(acc, 0x5e, sizeof *acc);
65	if (!(lcl = memget(sizeof *lcl))) {
66		errno = ENOMEM;
67		free(acc);
68		return (NULL);
69	}
70	memset(lcl, 0x5e, sizeof *lcl);
71	lcl->res = NULL;
72	lcl->free_res = NULL;
73	acc->private = lcl;
74#ifdef WANT_IRS_GR
75	acc->gr_map = irs_lcl_gr;
76#else
77	acc->gr_map = NULL;
78#endif
79#ifdef WANT_IRS_PW
80	acc->pw_map = irs_lcl_pw;
81#else
82	acc->pw_map = NULL;
83#endif
84	acc->sv_map = irs_lcl_sv;
85	acc->pr_map = irs_lcl_pr;
86	acc->ho_map = irs_lcl_ho;
87	acc->nw_map = irs_lcl_nw;
88	acc->ng_map = irs_lcl_ng;
89	acc->res_get = lcl_res_get;
90	acc->res_set = lcl_res_set;
91	acc->close = lcl_close;
92	return (acc);
93}
94
95/* Methods */
96static struct __res_state *
97lcl_res_get(struct irs_acc *this) {
98	struct lcl_p *lcl = (struct lcl_p *)this->private;
99
100	if (lcl->res == NULL) {
101		struct __res_state *res;
102		res = (struct __res_state *)malloc(sizeof *res);
103		if (res == NULL)
104			return (NULL);
105		memset(res, 0, sizeof *res);
106		lcl_res_set(this, res, free);
107	}
108
109	if ((lcl->res->options & RES_INIT) == 0U &&
110	    res_ninit(lcl->res) < 0)
111		return (NULL);
112
113	return (lcl->res);
114}
115
116static void
117lcl_res_set(struct irs_acc *this, struct __res_state *res,
118		void (*free_res)(void *)) {
119	struct lcl_p *lcl = (struct lcl_p *)this->private;
120
121	if (lcl->res && lcl->free_res) {
122		res_nclose(lcl->res);
123		(*lcl->free_res)(lcl->res);
124	}
125
126	lcl->res = res;
127	lcl->free_res = free_res;
128}
129
130static void
131lcl_close(struct irs_acc *this) {
132	struct lcl_p *lcl = (struct lcl_p *)this->private;
133
134	if (lcl) {
135		if (lcl->free_res)
136			(*lcl->free_res)(lcl->res);
137		memput(lcl, sizeof *lcl);
138	}
139	memput(this, sizeof *this);
140}
141
142/*! \file */
143