1 /* $NetBSD: output_cdb.c,v 1.3 2023/08/08 10:35:21 riastradh Exp $ */
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
45 static struct cdbw *cdbw;
46 static int cdbw_fd = -1;
47
48 int
cdb_open(const char * tname)49 cdb_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
63 void
cdb_add(StringList * sl,size_t port,const char * proto,size_t * cnt,int warndup)64 cdb_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
138 int
cdb_close(void)139 cdb_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