1 /* $NetBSD: setnetbootinfo.c,v 1.13 2009/03/14 21:04:03 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/fcntl.h> 35 #include <sys/stat.h> 36 #include <sys/socket.h> /* XXX */ 37 #include <net/if.h> /* XXX */ 38 #include <net/if_ether.h> 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "stand/common/bbinfo.h" 46 47 static void usage(void); 48 int main(int argc, char *argv[]); 49 50 int verbose, force, unset; 51 char *netboot, *outfile, *addr, *host; 52 53 char *outfilename; 54 55 struct ether_addr *ether_addr, _ether_addr; 56 57 static void 58 usage(void) 59 { 60 61 fprintf(stderr, "usage:\n"); 62 fprintf(stderr, "\tsetnetboot [-v] [-f] [-o outfile] \\\n"); 63 fprintf(stderr, "\t [-a ether-address | -h ether-host] infile\n"); 64 fprintf(stderr, "\tsetnetboot [-v] -u -o outfile infile\n"); 65 exit(1); 66 } 67 68 int 69 main(int argc, char *argv[]) 70 { 71 struct netbbinfo *netbbinfop; 72 struct stat sb; 73 u_int64_t *qp, csum; 74 char *netbb; 75 int c, fd, i; 76 77 while ((c = getopt(argc, argv, "a:fh:o:uv")) != -1) { 78 switch (c) { 79 case 'a': 80 /* use the argument as an ethernet address */ 81 addr = optarg; 82 break; 83 case 'f': 84 /* set force flag in network boot block */ 85 force = 1; 86 break; 87 case 'h': 88 /* use the argument as a host to find in /etc/ethers */ 89 host = optarg; 90 break; 91 case 'o': 92 /* use the argument as the output file name */ 93 outfile = optarg; 94 break; 95 case 'u': 96 /* remove configuration information */ 97 unset = 1; 98 break; 99 case 'v': 100 /* Chat */ 101 verbose = 1; 102 break; 103 default: 104 usage(); 105 } 106 } 107 108 if ((argc - optind) != 1) 109 usage(); 110 netboot = argv[optind]; 111 112 if (unset && (force || host != NULL || addr != NULL)) 113 errx(1, "-u can't be used with -f, -h, or -a"); 114 115 if (unset) { 116 if (force || host != NULL || addr != NULL) 117 errx(1, "-u can't be used with -f, -h, or -a"); 118 if (outfile == NULL) 119 errx(1, "-u cannot be used without -o"); 120 } else { 121 if ((host == NULL && addr == NULL) || 122 (host != NULL && addr != NULL)) 123 usage(); 124 125 if (host != NULL) { 126 if (ether_hostton(host, &_ether_addr) == -1) 127 errx(1, "ethernet address couldn't be found for \"%s\"", 128 host); 129 ether_addr = &_ether_addr; 130 } else { /* addr != NULL */ 131 ether_addr = ether_aton(addr); 132 if (ether_addr == NULL) 133 errx(1, "ethernet address \"%s\" is invalid", 134 addr); 135 } 136 } 137 138 if (outfile != NULL) 139 outfilename = outfile; 140 else { 141 /* name + 12 for enet addr + '.' before enet addr + NUL */ 142 outfilename = malloc(strlen(netboot) + 14); 143 if (outfilename == NULL) 144 err(1, "malloc of output file name failed"); 145 sprintf(outfilename, "%s.%02x%02x%02x%02x%02x%02x", netboot, 146 ether_addr->ether_addr_octet[0], 147 ether_addr->ether_addr_octet[1], 148 ether_addr->ether_addr_octet[2], 149 ether_addr->ether_addr_octet[3], 150 ether_addr->ether_addr_octet[4], 151 ether_addr->ether_addr_octet[5]); 152 } 153 154 if (verbose) { 155 printf("netboot: %s\n", netboot); 156 if (unset) 157 printf("unsetting configuration\n"); 158 else 159 printf("ethernet address: %s (%s), force = %d\n", 160 ether_ntoa(ether_addr), host ? host : addr, force); 161 printf("output netboot: %s\n", outfilename); 162 } 163 164 165 if (verbose) 166 printf("opening %s...\n", netboot); 167 if ((fd = open(netboot, O_RDONLY, 0)) == -1) 168 err(1, "open: %s", netboot); 169 if (fstat(fd, &sb) == -1) 170 err(1, "fstat: %s", netboot); 171 if (!S_ISREG(sb.st_mode)) 172 errx(1, "%s must be a regular file", netboot); 173 174 if (verbose) 175 printf("reading %s...\n", netboot); 176 netbb = malloc(sb.st_size); 177 if (netbb == NULL) 178 err(1, "malloc of %lu for %s failed", 179 (unsigned long)sb.st_size, netboot); 180 if (read(fd, netbb, sb.st_size) != sb.st_size) 181 err(1, "read of %lu from %s failed", 182 (unsigned long)sb.st_size, netboot); 183 184 if (verbose) 185 printf("closing %s...\n", netboot); 186 close(fd); 187 188 if (verbose) 189 printf("looking for netbbinfo...\n"); 190 netbbinfop = NULL; 191 for (qp = (u_int64_t *)netbb; qp < (u_int64_t *)(netbb + sb.st_size); 192 qp++) { 193 if (((struct netbbinfo *)qp)->magic1 == 0xfeedbabedeadbeefLL && 194 ((struct netbbinfo *)qp)->magic2 == 0xfeedbeefdeadbabeLL) { 195 netbbinfop = (struct netbbinfo *)qp; 196 break; 197 } 198 } 199 if (netbbinfop == NULL) 200 errx(1, "netboot information structure not found in %s", 201 netboot); 202 if (verbose) 203 printf("found netbbinfo structure at offset 0x%lx.\n", 204 (unsigned long)((char *)netbbinfop - netbb)); 205 206 if (verbose) 207 printf("setting netbbinfo structure...\n"); 208 memset(netbbinfop, 0, sizeof *netbbinfop); 209 netbbinfop->magic1 = 0xfeedbabedeadbeefLL; 210 netbbinfop->magic2 = 0xfeedbeefdeadbabeLL; 211 netbbinfop->set = unset ? 0 : 1; 212 if (netbbinfop->set) { 213 for (i = 0; i < 6; i++) 214 netbbinfop->ether_addr[i] = 215 ether_addr->ether_addr_octet[i]; 216 netbbinfop->force = force; 217 } 218 netbbinfop->cksum = 0; 219 220 if (verbose) 221 printf("setting netbbinfo checksum...\n"); 222 csum = 0; 223 for (i = 0, qp = (u_int64_t *)netbbinfop; 224 i < (sizeof *netbbinfop / sizeof (u_int64_t)); i++, qp++) 225 csum += *qp; 226 netbbinfop->cksum = -csum; 227 228 if (verbose) 229 printf("opening %s...\n", outfilename); 230 if ((fd = open(outfilename, O_WRONLY | O_CREAT, 0666)) == -1) 231 err(1, "open: %s", outfilename); 232 233 if (verbose) 234 printf("writing %s...\n", outfilename); 235 if (write(fd, netbb, sb.st_size) != sb.st_size) 236 err(1, "write of %lu to %s failed", 237 (unsigned long)sb.st_size, outfilename); 238 239 if (verbose) 240 printf("closing %s...\n", outfilename); 241 close(fd); 242 243 free(netbb); 244 if (outfile == NULL) 245 free(outfilename); 246 247 exit (0); 248 } 249