1/* $NetBSD: bootconfig.c,v 1.13 2020/10/18 16:28:57 skrll Exp $ */ 2 3/* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Mark Brinicombe 21 * for the NetBSD Project. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39#include "ether.h" 40 41#include <sys/param.h> 42 43__KERNEL_RCSID(0, "$NetBSD: bootconfig.c,v 1.13 2020/10/18 16:28:57 skrll Exp $"); 44 45#include <sys/systm.h> 46#include <sys/kmem.h> 47 48#include <machine/bootconfig.h> 49 50#if NETHER > 0 51#include <net/if_ether.h> 52#endif 53 54/* 55 * Function to identify and process different types of boot argument 56 * Note, results may contain trailing data, eg: 57 * get_bootconf_option("cow=moo milk=1", "moo", BOOTOPT_TYPE_STRING, &ptr) 58 * will return ptr of "moo milk=1", *not* "moo" 59 */ 60 61int __noasan 62get_bootconf_option(char *opts, const char *opt, int type, void *result) 63{ 64 char *ptr; 65 char *optstart; 66 bool neg; 67 68 ptr = opts; 69 70 while (*ptr) { 71 /* Find start of option */ 72 while (*ptr == ' ' || *ptr == '\t') 73 ++ptr; 74 75 if (*ptr == 0) 76 break; 77 78 neg = false; 79 80 /* Is it a negate option */ 81 if ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN && 82 *ptr == '!') { 83 neg = true; 84 ++ptr; 85 } 86 87 /* Find the end of option */ 88 optstart = ptr; 89 while (*ptr != 0 && *ptr != ' ' && *ptr != '\t' && *ptr != '=') 90 ++ptr; 91 92 if (*ptr == '=' || 93 (type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN) { 94 /* compare the option */ 95 if (strncmp(optstart, opt, (ptr - optstart)) == 0) { 96 /* found */ 97 98 if (*ptr == '=') 99 ++ptr; 100 101 switch (type & BOOTOPT_TYPE_MASK) { 102 case BOOTOPT_TYPE_BOOLEAN : 103 if (*(ptr - 1) == '=') 104 *((int *)result) = 105 ((u_int)strtoul(ptr, NULL, 106 10) != 0); 107 else 108 *((int *)result) = !neg; 109 break; 110 case BOOTOPT_TYPE_STRING : 111 *((char **)result) = ptr; 112 break; 113 case BOOTOPT_TYPE_INT : 114 *((int *)result) = 115 (u_int)strtoul(ptr, NULL, 10); 116 break; 117 case BOOTOPT_TYPE_BININT : 118 *((int *)result) = 119 (u_int)strtoul(ptr, NULL, 2); 120 break; 121 case BOOTOPT_TYPE_HEXINT : 122 *((int *)result) = 123 (u_int)strtoul(ptr, NULL, 16); 124 break; 125#if NETHER > 0 126 case BOOTOPT_TYPE_MACADDR : { 127 char mac[18]; 128 if (strlen(ptr) < ETHER_ADDR_LEN) 129 return 0; 130 strlcpy(mac, ptr, sizeof(mac)); 131 if (ether_aton_r((u_char *)result, 132 ETHER_ADDR_LEN, mac)) 133 return 0; 134 break; 135 } 136#endif 137 default: 138 return 0; 139 } 140 return 1; 141 } 142 } 143 /* skip to next option */ 144 while (*ptr != ' ' && *ptr != '\t' && *ptr != 0) 145 ++ptr; 146 } 147 return 0; 148} 149 150char * 151get_bootconf_string(char *opts, const char *key) 152{ 153 char *s, *ret; 154 int i = 0; 155 156 if (!get_bootconf_option(opts, key, BOOTOPT_TYPE_STRING, &s)) 157 return NULL; 158 159 for (;;) { 160 if (s[i] == ' ' || s[i] == '\t' || s[i] == '\0') 161 break; 162 ++i; 163 } 164 165 ret = kmem_alloc(i + 1, KM_SLEEP); 166 strlcpy(ret, s, i + 1); 167 return ret; 168} 169 170bool 171match_bootconf_option(char *opts, const char *key, const char *val) 172{ 173 char *s; 174 175 if (!get_bootconf_option(opts, key, BOOTOPT_TYPE_STRING, &s)) 176 return false; 177 178 return strncmp(s, val, strlen(val)) == 0; 179} 180