1 /* $NetBSD: env.c,v 1.5 2008/05/12 21:53:49 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 const char *ifname; 74 uint64_t ifflags; 75 int s; 76 77 if (prop_dictionary_get_uint64(env, "ifflags", &ifflags)) { 78 *flagsp = (unsigned short)ifflags; 79 return 0; 80 } 81 82 if ((s = getsock(AF_UNSPEC)) == -1) 83 return -1; 84 85 if ((ifname = getifname(env)) == NULL) 86 return -1; 87 88 memset(&ifr, 0, sizeof(ifr)); 89 estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 90 if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) 91 return -1; 92 93 *flagsp = (unsigned short)ifr.ifr_flags; 94 95 prop_dictionary_set_uint64(oenv, "ifflags", 96 (unsigned short)ifr.ifr_flags); 97 98 return 0; 99 } 100 101 const char * 102 getifinfo(prop_dictionary_t env, prop_dictionary_t oenv, unsigned short *flagsp) 103 { 104 if (getifflags(env, oenv, flagsp) == -1) 105 return NULL; 106 107 return getifname(env); 108 } 109 110 const char * 111 getifname(prop_dictionary_t env) 112 { 113 const char *s; 114 115 return prop_dictionary_get_cstring_nocopy(env, "if", &s) ? s : NULL; 116 } 117 118 ssize_t 119 getargdata(prop_dictionary_t env, const char *key, uint8_t *buf, size_t buflen) 120 { 121 prop_data_t data; 122 size_t datalen; 123 124 data = (prop_data_t)prop_dictionary_get(env, key); 125 if (data == NULL) { 126 errno = ENOENT; 127 return -1; 128 } 129 datalen = prop_data_size(data); 130 if (datalen > buflen) { 131 errno = ENAMETOOLONG; 132 return -1; 133 } 134 memset(buf, 0, buflen); 135 memcpy(buf, prop_data_data_nocopy(data), datalen); 136 return datalen; 137 } 138 139 ssize_t 140 getargstr(prop_dictionary_t env, const char *key, char *buf, size_t buflen) 141 { 142 prop_data_t data; 143 size_t datalen; 144 145 data = (prop_data_t)prop_dictionary_get(env, key); 146 if (data == NULL) { 147 errno = ENOENT; 148 return -1; 149 } 150 datalen = prop_data_size(data); 151 if (datalen >= buflen) { 152 errno = ENAMETOOLONG; 153 return -1; 154 } 155 memset(buf, 0, buflen); 156 memcpy(buf, prop_data_data_nocopy(data), datalen); 157 return datalen; 158 } 159 160 int 161 getaf(prop_dictionary_t env) 162 { 163 int64_t af; 164 165 if (!prop_dictionary_get_int64(env, "af", &af)) { 166 errno = ENOENT; 167 return -1; 168 } 169 return (int)af; 170 } 171