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NetBSD/usr.sbin/eeprom/eehandlers.c

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/* $NetBSD: eehandlers.c,v 1.18 2013/07/02 11:59:46 joerg Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include <sys/inttypes.h>
#include <machine/eeprom.h>
#include "defs.h"
extern char *path_eeprom;
extern int eval;
extern int update_checksums;
extern int ignore_checksum;
extern int fix_checksum;
extern int cksumfail;
extern u_short writecount;
static char err_str[BUFSIZE];
static void badval(const struct keytabent *, char *);
static int doio(const struct keytabent *, u_char *, ssize_t, int);
static u_char ee_checksum(u_char *, size_t);
static void ee_hwupdate(const struct keytabent *, char *);
static void ee_num8(const struct keytabent *, char *);
static void ee_num16(const struct keytabent *, char *);
static void ee_screensize(const struct keytabent *, char *);
static void ee_truefalse(const struct keytabent *, char *);
static void ee_bootdev(const struct keytabent *, char *);
static void ee_kbdtype(const struct keytabent *, char *);
static void ee_constype(const struct keytabent *, char *);
static void ee_diagpath(const struct keytabent *, char *);
static void ee_banner(const struct keytabent *, char *);
static void ee_notsupp(const struct keytabent *, char *);
static const struct keytabent eekeytab[] = {
{ "hwupdate", 0x10, ee_hwupdate },
{ "memsize", 0x14, ee_num8 },
{ "memtest", 0x15, ee_num8 },
{ "scrsize", 0x16, ee_screensize },
{ "watchdog_reboot", 0x17, ee_truefalse },
{ "default_boot", 0x18, ee_truefalse },
{ "bootdev", 0x19, ee_bootdev },
{ "kbdtype", 0x1e, ee_kbdtype },
{ "console", 0x1f, ee_constype },
{ "keyclick", 0x21, ee_truefalse },
{ "diagdev", 0x22, ee_bootdev },
{ "diagpath", 0x28, ee_diagpath },
{ "columns", 0x50, ee_num8 },
{ "rows", 0x51, ee_num8 },
{ "ttya_use_baud", 0x58, ee_truefalse },
{ "ttya_baud", 0x59, ee_num16 },
{ "ttya_no_rtsdtr", 0x5b, ee_truefalse },
{ "ttyb_use_baud", 0x60, ee_truefalse },
{ "ttyb_baud", 0x61, ee_num16 },
{ "ttyb_no_rtsdtr", 0x63, ee_truefalse },
{ "banner", 0x68, ee_banner },
{ "secure", 0, ee_notsupp },
{ "bad_login", 0, ee_notsupp },
{ "password", 0, ee_notsupp },
{ NULL, 0, ee_notsupp },
};
#define BARF(kt) { \
badval((kt), arg); \
++eval; \
return; \
}
#define FAILEDREAD(kt) { \
warnx("%s", err_str); \
warnx("failed to read field `%s'", (kt)->kt_keyword); \
++eval; \
return; \
}
#define FAILEDWRITE(kt) { \
warnx("%s", err_str); \
warnx("failed to update field `%s'", (kt)->kt_keyword); \
++eval; \
return; \
}
void
ee_action(char *keyword, char *arg)
{
const struct keytabent *ktent;
for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent) {
if (strcmp(ktent->kt_keyword, keyword) == 0) {
(*ktent->kt_handler)(ktent, arg);
return;
}
}
warnx("unknown keyword %s", keyword);
++eval;
}
void
ee_dump(void)
{
const struct keytabent *ktent;
for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent)
(*ktent->kt_handler)(ktent, NULL);
}
static void
ee_hwupdate(const struct keytabent *ktent, char *arg)
{
uint32_t hwtime;
time_t t;
char *cp, *cp2;
if (arg) {
if ((strcmp(arg, "now") == 0) ||
(strcmp(arg, "today") == 0)) {
if ((t = time(NULL)) == (time_t)(-1)) {
warnx("can't get current time");
++eval;
return;
}
} else
if ((t = parsedate(arg, NULL, NULL)) == (time_t)(-1))
BARF(ktent);
hwtime = (uint32_t)t; /* XXX 32 bit time_t on hardware */
if (hwtime != t)
warnx("time overflow");
if (doio(ktent, (u_char *)&hwtime, sizeof(hwtime), IO_WRITE))
FAILEDWRITE(ktent);
} else {
if (doio(ktent, (u_char *)&hwtime, sizeof(hwtime), IO_READ))
FAILEDREAD(ktent);
t = (time_t)hwtime; /* XXX 32 bit time_t on hardware */
}
cp = ctime(&t);
if (cp != NULL && (cp2 = strrchr(cp, '\n')) != NULL)
*cp2 = '\0';
printf("%s=%" PRId64, ktent->kt_keyword, (int64_t)t);
if (cp != NULL)
printf(" (%s)", cp);
printf("\n");
}
static void
ee_num8(const struct keytabent *ktent, char *arg)
{
u_char num8 = 0;
u_int num32;
int i;
if (arg) {
for (i = 0; i < (int)strlen(arg) - 1; ++i)
if (!isdigit((unsigned char)arg[i]))
BARF(ktent);
num32 = atoi(arg);
if (num32 > 0xff)
BARF(ktent);
num8 += num32;
if (doio(ktent, &num8, sizeof(num8), IO_WRITE))
FAILEDWRITE(ktent);
} else
if (doio(ktent, &num8, sizeof(num8), IO_READ))
FAILEDREAD(ktent);
printf("%s=%d\n", ktent->kt_keyword, num8);
}
static void
ee_num16(const struct keytabent *ktent, char *arg)
{
u_int16_t num16 = 0;
u_int num32;
int i;
if (arg) {
for (i = 0; i < (int)strlen(arg) - 1; ++i)
if (!isdigit((unsigned char)arg[i]))
BARF(ktent);
num32 = atoi(arg);
if (num32 > 0xffff)
BARF(ktent);
num16 += num32;
if (doio(ktent, (u_char *)&num16, sizeof(num16), IO_WRITE))
FAILEDWRITE(ktent);
} else
if (doio(ktent, (u_char *)&num16, sizeof(num16), IO_READ))
FAILEDREAD(ktent);
printf("%s=%d\n", ktent->kt_keyword, num16);
}
static const struct strvaltabent scrsizetab[] = {
{ "1152x900", EE_SCR_1152X900 },
{ "1024x1024", EE_SCR_1024X1024 },
{ "1600x1280", EE_SCR_1600X1280 },
{ "1440x1440", EE_SCR_1440X1440 },
{ NULL, 0 },
};
static void
ee_screensize(const struct keytabent *ktent, char *arg)
{
const struct strvaltabent *svp;
u_char scsize;
if (arg) {
for (svp = scrsizetab; svp->sv_str != NULL; ++svp)
if (strcmp(svp->sv_str, arg) == 0)
break;
if (svp->sv_str == NULL)
BARF(ktent);
scsize = svp->sv_val;
if (doio(ktent, &scsize, sizeof(scsize), IO_WRITE))
FAILEDWRITE(ktent);
} else {
if (doio(ktent, &scsize, sizeof(scsize), IO_READ))
FAILEDREAD(ktent);
for (svp = scrsizetab; svp->sv_str != NULL; ++svp)
if (svp->sv_val == scsize)
break;
if (svp->sv_str == NULL) {
warnx("unknown %s value %d", ktent->kt_keyword,
scsize);
return;
}
}
printf("%s=%s\n", ktent->kt_keyword, svp->sv_str);
}
static const struct strvaltabent truthtab[] = {
{ "true", EE_TRUE },
{ "false", EE_FALSE },
{ NULL, 0 },
};
static void
ee_truefalse(const struct keytabent *ktent, char *arg)
{
const struct strvaltabent *svp;
u_char truth;
if (arg) {
for (svp = truthtab; svp->sv_str != NULL; ++svp)
if (strcmp(svp->sv_str, arg) == 0)
break;
if (svp->sv_str == NULL)
BARF(ktent);
truth = svp->sv_val;
if (doio(ktent, &truth, sizeof(truth), IO_WRITE))
FAILEDWRITE(ktent);
} else {
if (doio(ktent, &truth, sizeof(truth), IO_READ))
FAILEDREAD(ktent);
for (svp = truthtab; svp->sv_str != NULL; ++svp)
if (svp->sv_val == truth)
break;
if (svp->sv_str == NULL) {
warnx("unknown truth value 0x%x for %s", truth,
ktent->kt_keyword);
return;
}
}
printf("%s=%s\n", ktent->kt_keyword, svp->sv_str);
}
static void
ee_bootdev(const struct keytabent *ktent, char *arg)
{
u_char dev[5];
int i;
size_t arglen;
char *cp;
if (arg) {
/*
* The format of the string we accept is the following:
* cc(n,n,n)
* where:
* c -- an alphabetical character [a-z]
* n -- a number in hexadecimal, between 0 and ff,
* with no leading `0x'.
*/
arglen = strlen(arg);
if (arglen < 9 || arglen > 12 || arg[2] != '(' ||
arg[arglen - 1] != ')')
BARF(ktent);
/* Handle the first 2 letters. */
for (i = 0; i < 2; ++i) {
if (arg[i] < 'a' || arg[i] > 'z')
BARF(ktent);
dev[i] = (u_char)arg[i];
}
/* Handle the 3 `0x'-less hex values. */
cp = &arg[3];
for (i = 2; i < 5; ++i) {
if (*cp == '\0')
BARF(ktent);
if (*cp >= '0' && *cp <= '9')
dev[i] = *cp++ - '0';
else if (*cp >= 'a' && *cp <= 'f')
dev[i] = 10 + (*cp++ - 'a');
else
BARF(ktent);
/* Deal with a second digit. */
if (*cp >= '0' && *cp <= '9') {
dev[i] <<= 4;
dev[i] &= 0xf0;
dev[i] += *cp++ - '0';
} else if (*cp >= 'a' && *cp <= 'f') {
dev[i] <<= 4;
dev[i] &= 0xf0;
dev[i] += 10 + (*cp++ - 'a');
}
/* Ensure we have the correct delimiter. */
if ((*cp == ',' && i < 4) || (*cp == ')' && i == 4)) {
++cp;
continue;
} else
BARF(ktent);
}
if (doio(ktent, (u_char *)&dev[0], sizeof(dev), IO_WRITE))
FAILEDWRITE(ktent);
} else
if (doio(ktent, (u_char *)&dev[0], sizeof(dev), IO_READ))
FAILEDREAD(ktent);
printf("%s=%c%c(%x,%x,%x)\n", ktent->kt_keyword, dev[0],
dev[1], dev[2], dev[3], dev[4]);
}
static void
ee_kbdtype(const struct keytabent *ktent, char *arg)
{
u_char kbd = 0;
u_int kbd2;
int i;
if (arg) {
for (i = 0; i < (int)strlen(arg) - 1; ++i)
if (!isdigit((unsigned char)arg[i]))
BARF(ktent);
kbd2 = atoi(arg);
if (kbd2 > 0xff)
BARF(ktent);
kbd += kbd2;
if (doio(ktent, &kbd, sizeof(kbd), IO_WRITE))
FAILEDWRITE(ktent);
} else
if (doio(ktent, &kbd, sizeof(kbd), IO_READ))
FAILEDREAD(ktent);
printf("%s=%d (%s)\n", ktent->kt_keyword, kbd, kbd ? "other" : "Sun");
}
static const struct strvaltabent constab[] = {
{ "b&w", EE_CONS_BW },
{ "ttya", EE_CONS_TTYA },
{ "ttyb", EE_CONS_TTYB },
{ "color", EE_CONS_COLOR },
{ "p4opt", EE_CONS_P4OPT },
{ NULL, 0 },
};
static void
ee_constype(const struct keytabent *ktent, char *arg)
{
const struct strvaltabent *svp;
u_char cons;
if (arg) {
for (svp = constab; svp->sv_str != NULL; ++svp)
if (strcmp(svp->sv_str, arg) == 0)
break;
if (svp->sv_str == NULL)
BARF(ktent);
cons = svp->sv_val;
if (doio(ktent, &cons, sizeof(cons), IO_WRITE))
FAILEDWRITE(ktent);
} else {
if (doio(ktent, &cons, sizeof(cons), IO_READ))
FAILEDREAD(ktent);
for (svp = constab; svp->sv_str != NULL; ++svp)
if (svp->sv_val == cons)
break;
if (svp->sv_str == NULL) {
warnx("unknown type 0x%x for %s", cons,
ktent->kt_keyword);
return;
}
}
printf("%s=%s\n", ktent->kt_keyword, svp->sv_str);
}
static void
ee_diagpath(const struct keytabent *ktent, char *arg)
{
char path[40];
memset(path, 0, sizeof(path));
if (arg) {
if (strlen(arg) > sizeof(path))
BARF(ktent);
memcpy(path, arg, sizeof path);
if (doio(ktent, (u_char *)&path[0], sizeof(path), IO_WRITE))
FAILEDWRITE(ktent);
} else
if (doio(ktent, (u_char *)&path[0], sizeof(path), IO_READ))
FAILEDREAD(ktent);
printf("%s=%s\n", ktent->kt_keyword, path);
}
static void
ee_banner(const struct keytabent *ktent, char *arg)
{
char string[80];
u_char enable;
struct keytabent kt;
kt.kt_keyword = "enable_banner";
kt.kt_offset = EE_BANNER_ENABLE_LOC;
kt.kt_handler = ee_notsupp;
memset(string, '\0', sizeof(string));
if (arg) {
if (strlen(arg) > sizeof(string))
BARF(ktent);
if (*arg != '\0') {
enable = EE_TRUE;
memcpy(string, arg, sizeof string);
if (doio(ktent, (u_char *)string,
sizeof(string), IO_WRITE))
FAILEDWRITE(ktent);
} else {
enable = EE_FALSE;
if (doio(ktent, (u_char *)string,
sizeof(string), IO_READ))
FAILEDREAD(ktent);
}
if (doio(&kt, &enable, sizeof(enable), IO_WRITE))
FAILEDWRITE(&kt);
} else {
if (doio(ktent, (u_char *)string, sizeof(string), IO_READ))
FAILEDREAD(ktent);
if (doio(&kt, &enable, sizeof(enable), IO_READ))
FAILEDREAD(&kt);
}
printf("%s=%s (%s)\n", ktent->kt_keyword, string,
enable == EE_TRUE ? "enabled" : "disabled");
}
/* ARGSUSED */
static void
ee_notsupp(const struct keytabent *ktent, char *arg)
{
warnx("field `%s' not yet supported", ktent->kt_keyword);
}
static void
badval(const struct keytabent *ktent, char *arg)
{
warnx("inappropriate value `%s' for field `%s'", arg,
ktent->kt_keyword);
}
static int
doio(const struct keytabent *ktent, u_char *buf, ssize_t len, int wr)
{
int fd, rval = 0;
u_char *buf2;
buf2 = (u_char *)calloc(1, len);
if (buf2 == NULL) {
memcpy(err_str, "memory allocation failed", sizeof err_str);
return (1);
}
fd = open(path_eeprom, wr == IO_WRITE ? O_RDWR : O_RDONLY, 0640);
if (fd < 0) {
(void)snprintf(err_str, sizeof err_str, "open: %s: %s", path_eeprom,
strerror(errno));
free(buf2);
return (1);
}
if (lseek(fd, (off_t)ktent->kt_offset, SEEK_SET) < (off_t)0) {
(void)snprintf(err_str, sizeof err_str, "lseek: %s: %s",
path_eeprom, strerror(errno));
rval = 1;
goto done;
}
if (read(fd, buf2, len) != len) {
(void)snprintf(err_str, sizeof err_str, "read: %s: %s",
path_eeprom, strerror(errno));
return (1);
}
if (wr == IO_WRITE) {
if (memcmp(buf, buf2, len) == 0)
goto done;
if (lseek(fd, (off_t)ktent->kt_offset, SEEK_SET) < (off_t)0) {
(void)snprintf(err_str, sizeof err_str, "lseek: %s: %s",
path_eeprom, strerror(errno));
rval = 1;
goto done;
}
++update_checksums;
if (write(fd, buf, len) < 0) {
(void)snprintf(err_str, sizeof err_str, "write: %s: %s",
path_eeprom, strerror(errno));
rval = 1;
goto done;
}
} else
memmove(buf, buf2, len);
done:
free(buf2);
(void)close(fd);
return (rval);
}
/*
* Read from eeLastHwUpdate to just before eeReserved. Calculate
* a checksum, and deposit 3 copies of it sequentially starting at
* eeChecksum[0]. Increment the write count, and deposit 3 copies
* of it sequentially starting at eeWriteCount[0].
*/
void
ee_updatechecksums(void)
{
struct keytabent kt;
u_char checkme[EE_SIZE - EE_HWUPDATE_LOC];
u_char checksum;
int i;
kt.kt_keyword = "eeprom contents";
kt.kt_offset = EE_HWUPDATE_LOC;
kt.kt_handler = ee_notsupp;
if (doio(&kt, checkme, sizeof(checkme), IO_READ)) {
cksumfail = 1;
FAILEDREAD(&kt);
}
checksum = ee_checksum(checkme, sizeof(checkme));
kt.kt_keyword = "eeprom checksum";
for (i = 0; i < 4; ++i) {
kt.kt_offset = EE_CKSUM_LOC + (i * sizeof(checksum));
if (doio(&kt, &checksum, sizeof(checksum), IO_WRITE)) {
cksumfail = 1;
FAILEDWRITE(&kt);
}
}
kt.kt_keyword = "eeprom writecount";
for (i = 0; i < 4; ++i) {
kt.kt_offset = EE_WC_LOC + (i * sizeof(writecount));
if (doio(&kt, (u_char *)&writecount, sizeof(writecount),
IO_WRITE)) {
cksumfail = 1;
FAILEDWRITE(&kt);
}
}
}
void
ee_verifychecksums(void)
{
struct keytabent kt;
u_char checkme[EE_SIZE - EE_HWUPDATE_LOC];
u_char checksum, ochecksum[3];
u_short owritecount[3];
/*
* Verify that the EEPROM's write counts match, and update the
* global copy for use later.
*/
kt.kt_keyword = "eeprom writecount";
kt.kt_offset = EE_WC_LOC;
kt.kt_handler = ee_notsupp;
if (doio(&kt, (u_char *)&owritecount, sizeof(owritecount), IO_READ)) {
cksumfail = 1;
FAILEDREAD(&kt);
}
if (owritecount[0] != owritecount[1] ||
owritecount[0] != owritecount[2]) {
warnx("eeprom writecount mismatch %s",
ignore_checksum ? "(ignoring)" :
(fix_checksum ? "(fixing)" : ""));
if (!ignore_checksum && !fix_checksum) {
cksumfail = 1;
return;
}
writecount = MAXIMUM(owritecount[0], owritecount[1]);
writecount = MAXIMUM(writecount, owritecount[2]);
} else
writecount = owritecount[0];
/*
* Verify that the EEPROM's checksums match and are correct.
*/
kt.kt_keyword = "eeprom checksum";
kt.kt_offset = EE_CKSUM_LOC;
if (doio(&kt, ochecksum, sizeof(ochecksum), IO_READ)) {
cksumfail = 1;
FAILEDREAD(&kt);
}
if (ochecksum[0] != ochecksum[1] ||
ochecksum[0] != ochecksum[2]) {
warnx("eeprom checksum mismatch %s",
ignore_checksum ? "(ignoring)" :
(fix_checksum ? "(fixing)" : ""));
if (!ignore_checksum && !fix_checksum) {
cksumfail = 1;
return;
}
}
kt.kt_keyword = "eeprom contents";
kt.kt_offset = EE_HWUPDATE_LOC;
if (doio(&kt, checkme, sizeof(checkme), IO_READ)) {
cksumfail = 1;
FAILEDREAD(&kt);
}
checksum = ee_checksum(checkme, sizeof(checkme));
if (ochecksum[0] != checksum) {
warnx("eeprom checksum incorrect %s",
ignore_checksum ? "(ignoring)" :
(fix_checksum ? "(fixing)" : ""));
if (!ignore_checksum && !fix_checksum) {
cksumfail = 1;
return;
}
}
if (fix_checksum)
ee_updatechecksums();
}
static u_char
ee_checksum(u_char *area, size_t len)
{
u_char sum = 0;
while (len--)
sum += *area++;
return (0x100 - sum);
}
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