1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1996,1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#if !defined(LINT) && !defined(CODECENTER)
21static const char rcsid[] = "Id: gen_pw.c,v 1.3 2005/04/27 04:56:24 sra Exp";
22#endif
23
24/* Imports */
25
26#include "port_before.h"
27
28#ifndef WANT_IRS_PW
29static int __bind_irs_pw_unneeded;
30#else
31
32#include <sys/types.h>
33#include <netinet/in.h>
34#include <arpa/nameser.h>
35#include <resolv.h>
36
37#include <errno.h>
38#include <pwd.h>
39#include <stdlib.h>
40#include <string.h>
41
42#include <isc/memcluster.h>
43#include <irs.h>
44
45#include "port_after.h"
46
47#include "irs_p.h"
48#include "gen_p.h"
49
50/* Types */
51
52struct pvt {
53	struct irs_rule *	rules;
54	struct irs_rule *	rule;
55	struct __res_state *	res;
56	void			(*free_res)(void *);
57};
58
59/* Forward */
60
61static void			pw_close(struct irs_pw *);
62static struct passwd *		pw_next(struct irs_pw *);
63static struct passwd *		pw_byname(struct irs_pw *, const char *);
64static struct passwd *		pw_byuid(struct irs_pw *, uid_t);
65static void			pw_rewind(struct irs_pw *);
66static void			pw_minimize(struct irs_pw *);
67static struct __res_state *	pw_res_get(struct irs_pw *);
68static void			pw_res_set(struct irs_pw *,
69					   struct __res_state *,
70					   void (*)(void *));
71
72/* Public */
73
74struct irs_pw *
75irs_gen_pw(struct irs_acc *this) {
76	struct gen_p *accpvt = (struct gen_p *)this->private;
77	struct irs_pw *pw;
78	struct pvt *pvt;
79
80	if (!(pw = memget(sizeof *pw))) {
81		errno = ENOMEM;
82		return (NULL);
83	}
84	memset(pw, 0x5e, sizeof *pw);
85	if (!(pvt = memget(sizeof *pvt))) {
86		memput(pw, sizeof *pvt);
87		errno = ENOMEM;
88		return (NULL);
89	}
90	memset(pvt, 0, sizeof *pvt);
91	pvt->rules = accpvt->map_rules[irs_pw];
92	pvt->rule = pvt->rules;
93	pw->private = pvt;
94	pw->close = pw_close;
95	pw->next = pw_next;
96	pw->byname = pw_byname;
97	pw->byuid = pw_byuid;
98	pw->rewind = pw_rewind;
99	pw->minimize = pw_minimize;
100	pw->res_get = pw_res_get;
101	pw->res_set = pw_res_set;
102	return (pw);
103}
104
105/* Methods */
106
107static void
108pw_close(struct irs_pw *this) {
109	struct pvt *pvt = (struct pvt *)this->private;
110
111	memput(pvt, sizeof *pvt);
112	memput(this, sizeof *this);
113}
114
115static struct passwd *
116pw_next(struct irs_pw *this) {
117	struct pvt *pvt = (struct pvt *)this->private;
118	struct passwd *rval;
119	struct irs_pw *pw;
120
121	while (pvt->rule) {
122		pw = pvt->rule->inst->pw;
123		rval = (*pw->next)(pw);
124		if (rval)
125			return (rval);
126		if (!(pvt->rule->flags & IRS_CONTINUE))
127			break;
128		pvt->rule = pvt->rule->next;
129		if (pvt->rule) {
130			pw = pvt->rule->inst->pw;
131			(*pw->rewind)(pw);
132		}
133	}
134	return (NULL);
135}
136
137static void
138pw_rewind(struct irs_pw *this) {
139	struct pvt *pvt = (struct pvt *)this->private;
140	struct irs_pw *pw;
141
142	pvt->rule = pvt->rules;
143	if (pvt->rule) {
144		pw = pvt->rule->inst->pw;
145		(*pw->rewind)(pw);
146	}
147}
148
149static struct passwd *
150pw_byname(struct irs_pw *this, const char *name) {
151	struct pvt *pvt = (struct pvt *)this->private;
152	struct irs_rule *rule;
153	struct passwd *rval;
154	struct irs_pw *pw;
155
156	rval = NULL;
157	for (rule = pvt->rules; rule; rule = rule->next) {
158		pw = rule->inst->pw;
159		rval = (*pw->byname)(pw, name);
160		if (rval || !(rule->flags & IRS_CONTINUE))
161			break;
162	}
163	return (rval);
164}
165
166static struct passwd *
167pw_byuid(struct irs_pw *this, uid_t uid) {
168	struct pvt *pvt = (struct pvt *)this->private;
169	struct irs_rule *rule;
170	struct passwd *rval;
171	struct irs_pw *pw;
172
173	rval = NULL;
174	for (rule = pvt->rules; rule; rule = rule->next) {
175		pw = rule->inst->pw;
176		rval = (*pw->byuid)(pw, uid);
177		if (rval || !(rule->flags & IRS_CONTINUE))
178			break;
179	}
180	return (rval);
181}
182
183static void
184pw_minimize(struct irs_pw *this) {
185	struct pvt *pvt = (struct pvt *)this->private;
186	struct irs_rule *rule;
187
188	for (rule = pvt->rules; rule != NULL; rule = rule->next) {
189		struct irs_pw *pw = rule->inst->pw;
190
191		(*pw->minimize)(pw);
192	}
193}
194
195static struct __res_state *
196pw_res_get(struct irs_pw *this) {
197	struct pvt *pvt = (struct pvt *)this->private;
198
199	if (!pvt->res) {
200		struct __res_state *res;
201		res = (struct __res_state *)malloc(sizeof *res);
202		if (!res) {
203			errno = ENOMEM;
204			return (NULL);
205		}
206		memset(res, 0, sizeof *res);
207		pw_res_set(this, res, free);
208	}
209
210	return (pvt->res);
211}
212
213static void
214pw_res_set(struct irs_pw *this, struct __res_state *res,
215		void (*free_res)(void *)) {
216	struct pvt *pvt = (struct pvt *)this->private;
217	struct irs_rule *rule;
218
219	if (pvt->res && pvt->free_res) {
220		res_nclose(pvt->res);
221		(*pvt->free_res)(pvt->res);
222	}
223
224	pvt->res = res;
225	pvt->free_res = free_res;
226
227	for (rule = pvt->rules; rule != NULL; rule = rule->next) {
228		struct irs_pw *pw = rule->inst->pw;
229
230		if (pw->res_set)
231			(*pw->res_set)(pw, pvt->res, NULL);
232	}
233}
234
235#endif /* WANT_IRS_PW */
236/*! \file */
237