1/*	$NetBSD$	*/
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Joerg Sonnenberger.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32
33#include <sys/endian.h>
34#include <cdbw.h>
35#include <err.h>
36#include <errno.h>
37#include <fcntl.h>
38#include <stdlib.h>
39#include <string.h>
40#include <stringlist.h>
41#include <unistd.h>
42
43#include "extern.h"
44
45static struct cdbw *cdbw;
46static int cdbw_fd = -1;
47
48int
49cdb_open(const char *tname)
50{
51
52	if ((cdbw = cdbw_open()) == NULL)
53		return -1;
54
55	if ((cdbw_fd = open(tname, O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1) {
56		cdbw_close(cdbw);
57		cdbw = NULL;
58		return -1;
59	}
60	return 0;
61}
62
63void
64cdb_add(StringList *sl, size_t port, const char *proto, size_t *cnt,
65    int warndup)
66{
67	uint8_t key[255 * 2 + 2];
68	uint8_t *data, *data_iter;
69	size_t len, protolen, datalen, keylen;
70	uint32_t idx;
71	size_t i;
72
73	protolen = strlen(proto);
74	if (protolen == 0 || protolen > 255)
75		errx(1, "Invalid protocol ``%s'', entry skipped", proto);
76
77	datalen = 4 + protolen;
78	for (i = 0; i < sl->sl_cur; ++i) {
79		len = strlen(sl->sl_str[i]);
80		if (len == 0 || len > 255)
81			errx(1, "Service alias ``%s'' invalid", sl->sl_str[i]);
82		datalen += len + 2;
83	}
84
85	data = malloc(datalen);
86	if (data == NULL)
87		err(1, "malloc failed");
88	be16enc(data, port);
89	data[2] = protolen;
90	data_iter = data + 3;
91	memcpy(data_iter, proto, protolen + 1);
92	data_iter += protolen + 1;
93	for (i = 0; i < sl->sl_cur; ++i) {
94		len = strlen(sl->sl_str[i]);
95		*data_iter++ = len;
96		memcpy(data_iter, sl->sl_str[i], len + 1);
97		data_iter += len + 1;
98	}
99
100	if (cdbw_put_data(cdbw, data, datalen, &idx))
101		err(1, "cdbw_put_data failed");
102
103	free(data);
104
105	key[0] = 0;
106	key[1] = protolen;
107	be16enc(key + 2, port);
108	memcpy(key + 4, proto, protolen);
109	keylen = 4 + protolen;
110	if (cdbw_put_key(cdbw, key, keylen, idx) && warndup)
111		warnx("duplicate service: `%zu/%s'", port, proto);
112
113	key[1] = 0;
114	keylen = 4;
115	if (cdbw_put_key(cdbw, key, keylen, idx) && warndup)
116		warnx("duplicate service: `%zu'", port);
117
118	/* add references for service and all aliases */
119	for (i = 0; i < sl->sl_cur; i++) {
120		len = strlen(sl->sl_str[i]);
121		key[0] = len;
122		key[1] = protolen;
123		memcpy(key + 2, sl->sl_str[i], len);
124		memcpy(key + 2 + len, proto, protolen);
125		keylen = 2 + len + protolen;
126		if (cdbw_put_key(cdbw, key, keylen, idx) && warndup)
127			warnx("duplicate service: `%s/%s'", sl->sl_str[i], proto);
128
129		key[1] = 0;
130		keylen = 2 + len;
131		if (cdbw_put_key(cdbw, key, keylen, idx) && warndup)
132			warnx("duplicate service: `%s'", sl->sl_str[i]);
133	}
134
135	sl_free(sl, 1);
136}
137
138int
139cdb_close(void)
140{
141	int rv, serrno;
142
143	rv = 0;
144	serrno = errno;
145
146	if (cdbw_output(cdbw, cdbw_fd, "services(5)", NULL)) {
147		rv = -1;
148		serrno = errno;
149	}
150
151	cdbw_close(cdbw);
152	cdbw = NULL;
153
154	if (close(cdbw_fd)) {
155		if (rv == 0)
156			serrno = errno;
157		rv = -1;
158	}
159	cdbw_fd = -1;
160
161	errno = serrno;
162	return rv;
163}
164