env.c revision 1.2 1 /* $NetBSD: env.c,v 1.2 2008/05/06 16:09:18 dyoung Exp $ */
2
3 /*-
4 * Copyright (c)2008 David Young. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <errno.h>
29 #include <string.h>
30 #include <stdlib.h>
31 #include <util.h>
32
33 #include <net/if.h>
34 #include <sys/socket.h>
35 #include <sys/ioctl.h>
36
37 #include "env.h"
38 #include "util.h"
39
40 prop_dictionary_t
41 prop_dictionary_augment(prop_dictionary_t bottom, prop_dictionary_t top)
42 {
43 prop_object_iterator_t i;
44 prop_dictionary_t d;
45 prop_object_t ko, o;
46 prop_dictionary_keysym_t k;
47 const char *key;
48
49 d = prop_dictionary_copy_mutable(bottom);
50
51 i = prop_dictionary_iterator(top);
52
53 while ((ko = prop_object_iterator_next(i)) != NULL) {
54 k = (prop_dictionary_keysym_t)ko;
55 key = prop_dictionary_keysym_cstring_nocopy(k);
56 o = prop_dictionary_get_keysym(top, k);
57 if (o == NULL || !prop_dictionary_set(d, key, o)) {
58 prop_object_release((prop_object_t)d);
59 d = NULL;
60 break;
61 }
62 }
63 prop_object_iterator_release(i);
64 prop_dictionary_make_immutable(d);
65 return d;
66 }
67
68 int
69 getifflags(prop_dictionary_t env, prop_dictionary_t oenv,
70 unsigned short *flagsp)
71 {
72 struct ifreq ifr;
73 prop_number_t num;
74 const char *ifname;
75 int s;
76
77 num = (prop_number_t)prop_dictionary_get(env, "ifflags");
78
79 if (num != NULL) {
80 *flagsp = (unsigned short)prop_number_integer_value(num);
81 return 0;
82 }
83
84 if ((s = getsock(AF_UNSPEC)) == -1)
85 return -1;
86
87 if ((ifname = getifname(env)) == NULL)
88 return -1;
89
90 memset(&ifr, 0, sizeof(ifr));
91 estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
92 if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1)
93 return -1;
94
95 *flagsp = (unsigned short)ifr.ifr_flags;
96
97 num = prop_number_create_unsigned_integer(
98 (unsigned short)ifr.ifr_flags);
99 (void)prop_dictionary_set(oenv, "ifflags", num);
100 prop_object_release((prop_object_t)num);
101
102 return 0;
103 }
104
105 const char *
106 getifinfo(prop_dictionary_t env, prop_dictionary_t oenv, unsigned short *flagsp)
107 {
108 if (getifflags(env, oenv, flagsp) == -1)
109 return NULL;
110
111 return getifname(env);
112 }
113
114 const char *
115 getifname(prop_dictionary_t env)
116 {
117 prop_string_t str;
118
119 str = (prop_string_t)prop_dictionary_get(env, "if");
120 if (str == NULL)
121 return NULL;
122 return prop_string_cstring_nocopy(str);
123 }
124
125 ssize_t
126 getargdata(prop_dictionary_t env, const char *key, uint8_t *buf, size_t buflen)
127 {
128 prop_data_t data;
129 size_t datalen;
130
131 data = (prop_data_t)prop_dictionary_get(env, key);
132 if (data == NULL) {
133 errno = ENOENT;
134 return -1;
135 }
136 datalen = prop_data_size(data);
137 if (datalen > buflen) {
138 errno = ENAMETOOLONG;
139 return -1;
140 }
141 memset(buf, 0, buflen);
142 memcpy(buf, prop_data_data_nocopy(data), datalen);
143 return datalen;
144 }
145
146 ssize_t
147 getargstr(prop_dictionary_t env, const char *key, char *buf, size_t buflen)
148 {
149 prop_data_t data;
150 size_t datalen;
151
152 data = (prop_data_t)prop_dictionary_get(env, "bssid");
153 if (data == NULL) {
154 errno = ENOENT;
155 return -1;
156 }
157 datalen = prop_data_size(data);
158 if (datalen >= buflen) {
159 errno = ENAMETOOLONG;
160 return -1;
161 }
162 memset(buf, 0, buflen);
163 memcpy(buf, prop_data_data_nocopy(data), datalen);
164 return datalen;
165 }
166
167 int
168 getaf(prop_dictionary_t env)
169 {
170 prop_number_t num;
171
172 num = (prop_number_t)prop_dictionary_get(env, "af");
173 if (num == NULL) {
174 errno = ENOENT;
175 return -1;
176 }
177 return (int)prop_number_integer_value(num);
178 }
179