env.c revision 1.12 1 1.12 msaitoh /* $NetBSD: env.c,v 1.12 2019/08/16 10:33:17 msaitoh Exp $ */
2 1.2 dyoung
3 1.2 dyoung /*-
4 1.5 dyoung * Copyright (c) 2008 David Young. All rights reserved.
5 1.2 dyoung *
6 1.2 dyoung * Redistribution and use in source and binary forms, with or without
7 1.2 dyoung * modification, are permitted provided that the following conditions
8 1.2 dyoung * are met:
9 1.2 dyoung * 1. Redistributions of source code must retain the above copyright
10 1.2 dyoung * notice, this list of conditions and the following disclaimer.
11 1.2 dyoung * 2. Redistributions in binary form must reproduce the above copyright
12 1.2 dyoung * notice, this list of conditions and the following disclaimer in the
13 1.2 dyoung * documentation and/or other materials provided with the distribution.
14 1.2 dyoung *
15 1.2 dyoung * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 1.2 dyoung * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 1.2 dyoung * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 1.2 dyoung * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 1.2 dyoung * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 1.2 dyoung * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 1.2 dyoung * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 1.2 dyoung * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 1.2 dyoung * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 1.2 dyoung * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 1.2 dyoung * SUCH DAMAGE.
26 1.2 dyoung */
27 1.2 dyoung
28 1.6 dyoung #include <sys/cdefs.h>
29 1.6 dyoung #ifndef lint
30 1.12 msaitoh __RCSID("$NetBSD: env.c,v 1.12 2019/08/16 10:33:17 msaitoh Exp $");
31 1.6 dyoung #endif /* not lint */
32 1.6 dyoung
33 1.1 dyoung #include <errno.h>
34 1.1 dyoung #include <string.h>
35 1.1 dyoung #include <stdlib.h>
36 1.1 dyoung #include <util.h>
37 1.1 dyoung
38 1.1 dyoung #include <net/if.h>
39 1.1 dyoung #include <sys/socket.h>
40 1.1 dyoung #include <sys/ioctl.h>
41 1.1 dyoung
42 1.1 dyoung #include "env.h"
43 1.1 dyoung #include "util.h"
44 1.7 pooka #include "prog_ops.h"
45 1.1 dyoung
46 1.1 dyoung prop_dictionary_t
47 1.1 dyoung prop_dictionary_augment(prop_dictionary_t bottom, prop_dictionary_t top)
48 1.1 dyoung {
49 1.1 dyoung prop_object_iterator_t i;
50 1.1 dyoung prop_dictionary_t d;
51 1.1 dyoung prop_object_t ko, o;
52 1.1 dyoung prop_dictionary_keysym_t k;
53 1.1 dyoung const char *key;
54 1.1 dyoung
55 1.1 dyoung d = prop_dictionary_copy_mutable(bottom);
56 1.9 apb if (d == NULL)
57 1.9 apb return NULL;
58 1.1 dyoung
59 1.1 dyoung i = prop_dictionary_iterator(top);
60 1.1 dyoung
61 1.9 apb while (i != NULL && (ko = prop_object_iterator_next(i)) != NULL) {
62 1.1 dyoung k = (prop_dictionary_keysym_t)ko;
63 1.1 dyoung key = prop_dictionary_keysym_cstring_nocopy(k);
64 1.1 dyoung o = prop_dictionary_get_keysym(top, k);
65 1.1 dyoung if (o == NULL || !prop_dictionary_set(d, key, o)) {
66 1.1 dyoung prop_object_release((prop_object_t)d);
67 1.1 dyoung d = NULL;
68 1.1 dyoung break;
69 1.1 dyoung }
70 1.1 dyoung }
71 1.9 apb if (i != NULL)
72 1.9 apb prop_object_iterator_release(i);
73 1.9 apb if (d != NULL)
74 1.8 apb prop_dictionary_make_immutable(d);
75 1.1 dyoung return d;
76 1.1 dyoung }
77 1.1 dyoung
78 1.1 dyoung int
79 1.1 dyoung getifflags(prop_dictionary_t env, prop_dictionary_t oenv,
80 1.1 dyoung unsigned short *flagsp)
81 1.1 dyoung {
82 1.1 dyoung struct ifreq ifr;
83 1.1 dyoung const char *ifname;
84 1.3 dyoung uint64_t ifflags;
85 1.1 dyoung int s;
86 1.1 dyoung
87 1.3 dyoung if (prop_dictionary_get_uint64(env, "ifflags", &ifflags)) {
88 1.3 dyoung *flagsp = (unsigned short)ifflags;
89 1.1 dyoung return 0;
90 1.1 dyoung }
91 1.1 dyoung
92 1.1 dyoung if ((s = getsock(AF_UNSPEC)) == -1)
93 1.1 dyoung return -1;
94 1.1 dyoung
95 1.1 dyoung if ((ifname = getifname(env)) == NULL)
96 1.1 dyoung return -1;
97 1.1 dyoung
98 1.1 dyoung memset(&ifr, 0, sizeof(ifr));
99 1.1 dyoung estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
100 1.7 pooka if (prog_ioctl(s, SIOCGIFFLAGS, &ifr) == -1)
101 1.1 dyoung return -1;
102 1.1 dyoung
103 1.1 dyoung *flagsp = (unsigned short)ifr.ifr_flags;
104 1.1 dyoung
105 1.3 dyoung prop_dictionary_set_uint64(oenv, "ifflags",
106 1.1 dyoung (unsigned short)ifr.ifr_flags);
107 1.1 dyoung
108 1.1 dyoung return 0;
109 1.1 dyoung }
110 1.1 dyoung
111 1.1 dyoung const char *
112 1.1 dyoung getifinfo(prop_dictionary_t env, prop_dictionary_t oenv, unsigned short *flagsp)
113 1.1 dyoung {
114 1.1 dyoung if (getifflags(env, oenv, flagsp) == -1)
115 1.1 dyoung return NULL;
116 1.1 dyoung
117 1.1 dyoung return getifname(env);
118 1.1 dyoung }
119 1.1 dyoung
120 1.1 dyoung const char *
121 1.1 dyoung getifname(prop_dictionary_t env)
122 1.1 dyoung {
123 1.3 dyoung const char *s;
124 1.1 dyoung
125 1.3 dyoung return prop_dictionary_get_cstring_nocopy(env, "if", &s) ? s : NULL;
126 1.1 dyoung }
127 1.1 dyoung
128 1.1 dyoung ssize_t
129 1.1 dyoung getargdata(prop_dictionary_t env, const char *key, uint8_t *buf, size_t buflen)
130 1.1 dyoung {
131 1.1 dyoung prop_data_t data;
132 1.1 dyoung size_t datalen;
133 1.1 dyoung
134 1.1 dyoung data = (prop_data_t)prop_dictionary_get(env, key);
135 1.1 dyoung if (data == NULL) {
136 1.1 dyoung errno = ENOENT;
137 1.1 dyoung return -1;
138 1.1 dyoung }
139 1.1 dyoung datalen = prop_data_size(data);
140 1.1 dyoung if (datalen > buflen) {
141 1.12 msaitoh errno = ENAMETOOLONG;
142 1.1 dyoung return -1;
143 1.1 dyoung }
144 1.1 dyoung memcpy(buf, prop_data_data_nocopy(data), datalen);
145 1.11 christos memset(buf + datalen, 0, buflen - datalen);
146 1.1 dyoung return datalen;
147 1.1 dyoung }
148 1.1 dyoung
149 1.1 dyoung ssize_t
150 1.1 dyoung getargstr(prop_dictionary_t env, const char *key, char *buf, size_t buflen)
151 1.1 dyoung {
152 1.1 dyoung prop_data_t data;
153 1.1 dyoung size_t datalen;
154 1.1 dyoung
155 1.4 dyoung data = (prop_data_t)prop_dictionary_get(env, key);
156 1.1 dyoung if (data == NULL) {
157 1.1 dyoung errno = ENOENT;
158 1.1 dyoung return -1;
159 1.1 dyoung }
160 1.1 dyoung datalen = prop_data_size(data);
161 1.1 dyoung if (datalen >= buflen) {
162 1.12 msaitoh errno = ENAMETOOLONG;
163 1.1 dyoung return -1;
164 1.1 dyoung }
165 1.1 dyoung memcpy(buf, prop_data_data_nocopy(data), datalen);
166 1.10 christos memset(buf + datalen, 0, buflen - datalen);
167 1.1 dyoung return datalen;
168 1.1 dyoung }
169 1.1 dyoung
170 1.1 dyoung int
171 1.1 dyoung getaf(prop_dictionary_t env)
172 1.1 dyoung {
173 1.3 dyoung int64_t af;
174 1.1 dyoung
175 1.3 dyoung if (!prop_dictionary_get_int64(env, "af", &af)) {
176 1.1 dyoung errno = ENOENT;
177 1.1 dyoung return -1;
178 1.1 dyoung }
179 1.3 dyoung return (int)af;
180 1.1 dyoung }
181