1 /* $NetBSD: env.c,v 1.7 2010/12/13 17:35:08 pooka 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 <sys/cdefs.h> 29 #ifndef lint 30 __RCSID("$NetBSD: env.c,v 1.7 2010/12/13 17:35:08 pooka Exp $"); 31 #endif /* not lint */ 32 33 #include <errno.h> 34 #include <string.h> 35 #include <stdlib.h> 36 #include <util.h> 37 38 #include <net/if.h> 39 #include <sys/socket.h> 40 #include <sys/ioctl.h> 41 42 #include "env.h" 43 #include "util.h" 44 #include "prog_ops.h" 45 46 prop_dictionary_t 47 prop_dictionary_augment(prop_dictionary_t bottom, prop_dictionary_t top) 48 { 49 prop_object_iterator_t i; 50 prop_dictionary_t d; 51 prop_object_t ko, o; 52 prop_dictionary_keysym_t k; 53 const char *key; 54 55 d = prop_dictionary_copy_mutable(bottom); 56 57 i = prop_dictionary_iterator(top); 58 59 while ((ko = prop_object_iterator_next(i)) != NULL) { 60 k = (prop_dictionary_keysym_t)ko; 61 key = prop_dictionary_keysym_cstring_nocopy(k); 62 o = prop_dictionary_get_keysym(top, k); 63 if (o == NULL || !prop_dictionary_set(d, key, o)) { 64 prop_object_release((prop_object_t)d); 65 d = NULL; 66 break; 67 } 68 } 69 prop_object_iterator_release(i); 70 prop_dictionary_make_immutable(d); 71 return d; 72 } 73 74 int 75 getifflags(prop_dictionary_t env, prop_dictionary_t oenv, 76 unsigned short *flagsp) 77 { 78 struct ifreq ifr; 79 const char *ifname; 80 uint64_t ifflags; 81 int s; 82 83 if (prop_dictionary_get_uint64(env, "ifflags", &ifflags)) { 84 *flagsp = (unsigned short)ifflags; 85 return 0; 86 } 87 88 if ((s = getsock(AF_UNSPEC)) == -1) 89 return -1; 90 91 if ((ifname = getifname(env)) == NULL) 92 return -1; 93 94 memset(&ifr, 0, sizeof(ifr)); 95 estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 96 if (prog_ioctl(s, SIOCGIFFLAGS, &ifr) == -1) 97 return -1; 98 99 *flagsp = (unsigned short)ifr.ifr_flags; 100 101 prop_dictionary_set_uint64(oenv, "ifflags", 102 (unsigned short)ifr.ifr_flags); 103 104 return 0; 105 } 106 107 const char * 108 getifinfo(prop_dictionary_t env, prop_dictionary_t oenv, unsigned short *flagsp) 109 { 110 if (getifflags(env, oenv, flagsp) == -1) 111 return NULL; 112 113 return getifname(env); 114 } 115 116 const char * 117 getifname(prop_dictionary_t env) 118 { 119 const char *s; 120 121 return prop_dictionary_get_cstring_nocopy(env, "if", &s) ? s : NULL; 122 } 123 124 ssize_t 125 getargdata(prop_dictionary_t env, const char *key, uint8_t *buf, size_t buflen) 126 { 127 prop_data_t data; 128 size_t datalen; 129 130 data = (prop_data_t)prop_dictionary_get(env, key); 131 if (data == NULL) { 132 errno = ENOENT; 133 return -1; 134 } 135 datalen = prop_data_size(data); 136 if (datalen > buflen) { 137 errno = ENAMETOOLONG; 138 return -1; 139 } 140 memset(buf, 0, buflen); 141 memcpy(buf, prop_data_data_nocopy(data), datalen); 142 return datalen; 143 } 144 145 ssize_t 146 getargstr(prop_dictionary_t env, const char *key, char *buf, size_t buflen) 147 { 148 prop_data_t data; 149 size_t datalen; 150 151 data = (prop_data_t)prop_dictionary_get(env, key); 152 if (data == NULL) { 153 errno = ENOENT; 154 return -1; 155 } 156 datalen = prop_data_size(data); 157 if (datalen >= buflen) { 158 errno = ENAMETOOLONG; 159 return -1; 160 } 161 memset(buf, 0, buflen); 162 memcpy(buf, prop_data_data_nocopy(data), datalen); 163 return datalen; 164 } 165 166 int 167 getaf(prop_dictionary_t env) 168 { 169 int64_t af; 170 171 if (!prop_dictionary_get_int64(env, "af", &af)) { 172 errno = ENOENT; 173 return -1; 174 } 175 return (int)af; 176 } 177