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/* $OpenBSD: setnetbootinfo.c,v 1.2 2003/05/11 19:41:09 deraadt Exp $ */
/* $NetBSD: setnetbootinfo.c,v 1.5 1997/04/06 08:41:37 cgd Exp $ */
/*
* Copyright (c) 1997 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/socket.h> /* XXX */
#include <net/if.h> /* XXX */
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include "bbinfo.h"
int verbose, force, unset;
char *netboot, *outfile, *addr, *host;
char *outfilename;
struct ether_addr *ether_addr, _ether_addr;
static void
usage()
{
(void)fprintf(stderr, "usage:\n");
(void)fprintf(stderr, "\tsetnetboot [-v] [-f] [-o outfile] \\\n");
(void)fprintf(stderr, "\t [-a ether-address | -h ether-host] infile\n");
(void)fprintf(stderr, "\tsetnetboot [-v] -u -o outfile infile\n");
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
struct netbbinfo *netbbinfop;
struct stat sb;
u_int64_t *qp, csum;
char *netbb;
int c, fd, i;
while ((c = getopt(argc, argv, "a:fh:o:uv")) != -1) {
switch (c) {
case 'a':
/* use the argument as an ethernet address */
addr = optarg;
break;
case 'f':
/* set force flag in network boot block */
force = 1;
break;
case 'h':
/* use the argument as a host to find in /etc/ethers */
host = optarg;
break;
case 'o':
/* use the argument as the output file name */
outfile = optarg;
break;
case 'u':
/* remove configuration information */
unset = 1;
break;
case 'v':
/* Chat */
verbose = 1;
break;
default:
usage();
}
}
if ((argc - optind) != 1)
usage();
netboot = argv[optind];
if (unset && (force || host != NULL || addr != NULL))
errx(1, "-u can't be used with -f, -h, or -a");
if (unset) {
if (force || host != NULL || addr != NULL)
errx(1, "-u can't be used with -f, -h, or -a");
if (outfile == NULL)
errx(1, "-u cannot be used without -o");
} else {
if ((host == NULL && addr == NULL) ||
(host != NULL && addr != NULL))
usage();
if (host != NULL) {
if (ether_hostton(host, &_ether_addr) == -1)
errx(1, "ethernet address couldn't be found for \"%s\"",
host);
ether_addr = &_ether_addr;
} else { /* addr != NULL */
ether_addr = ether_aton(addr);
if (ether_addr == NULL)
errx(1, "ethernet address \"%s\" is invalid",
addr);
}
}
if (outfile != NULL)
outfilename = outfile;
else {
/* name + 12 for enet addr + '.' before enet addr + NUL */
size_t len = strlen(netboot) + 14;
outfilename = malloc(len);
if (outfilename == NULL)
err(1, "malloc of output file name failed");
snprintf(outfilename, len,
"%s.%02x%02x%02x%02x%02x%02x", netboot,
ether_addr->ether_addr_octet[0],
ether_addr->ether_addr_octet[1],
ether_addr->ether_addr_octet[2],
ether_addr->ether_addr_octet[3],
ether_addr->ether_addr_octet[4],
ether_addr->ether_addr_octet[5]);
}
if (verbose) {
printf("netboot: %s\n", netboot);
if (unset)
printf("unsetting configuration\n");
else
printf("ethernet address: %s (%s), force = %d\n",
ether_ntoa(ether_addr), host ? host : addr, force);
printf("output netboot: %s\n", outfilename);
}
if (verbose)
printf("opening %s...\n", netboot);
if ((fd = open(netboot, O_RDONLY, 0)) == -1)
err(1, "open: %s", netboot);
if (fstat(fd, &sb) == -1)
err(1, "fstat: %s", netboot);
if (!S_ISREG(sb.st_mode))
errx(1, "%s must be a regular file", netboot);
if (verbose)
printf("reading %s...\n", netboot);
netbb = malloc(sb.st_size);
if (netbb == NULL)
err(1, "malloc of %lu for %s failed",
(unsigned long)sb.st_size, netboot);
if (read(fd, netbb, sb.st_size) != sb.st_size)
err(1, "read of %lu from %s failed",
(unsigned long)sb.st_size, netboot);
if (verbose)
printf("closing %s...\n", netboot);
close(fd);
if (verbose)
printf("looking for netbbinfo...\n");
netbbinfop = NULL;
for (qp = (u_int64_t *)netbb; qp < (u_int64_t *)(netbb + sb.st_size);
qp++) {
if (((struct netbbinfo *)qp)->magic1 == 0xfeedbabedeadbeef &&
((struct netbbinfo *)qp)->magic2 == 0xfeedbeefdeadbabe) {
netbbinfop = (struct netbbinfo *)qp;
break;
}
}
if (netbbinfop == NULL)
errx(1, "netboot information structure not found in %s",
netboot);
if (verbose)
printf("found netbbinfo structure at offset 0x%lx.\n",
(unsigned long)((char *)netbbinfop - netbb));
if (verbose)
printf("setting netbbinfo structure...\n");
bzero(netbbinfop, sizeof *netbbinfop);
netbbinfop->magic1 = 0xfeedbabedeadbeef;
netbbinfop->magic2 = 0xfeedbeefdeadbabe;
netbbinfop->set = unset ? 0 : 1;
if (netbbinfop->set) {
for (i = 0; i < 6; i++)
netbbinfop->ether_addr[i] =
ether_addr->ether_addr_octet[i];
netbbinfop->force = force;
}
netbbinfop->cksum = 0;
if (verbose)
printf("setting netbbinfo checksum...\n");
csum = 0;
for (i = 0, qp = (u_int64_t *)netbbinfop;
i < (sizeof *netbbinfop / sizeof (u_int64_t)); i++, qp++)
csum += *qp;
netbbinfop->cksum = -csum;
if (verbose)
printf("opening %s...\n", outfilename);
if ((fd = open(outfilename, O_WRONLY | O_CREAT, 0666)) == -1)
err(1, "open: %s", outfilename);
if (verbose)
printf("writing %s...\n", outfilename);
if (write(fd, netbb, sb.st_size) != sb.st_size)
err(1, "write of %lu to %s failed",
(unsigned long)sb.st_size, outfilename);
if (verbose)
printf("closing %s...\n", outfilename);
close(fd);
free(netbb);
if (outfile == NULL)
free(outfilename);
exit (0);
}
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