2005-03-08 18:53:11 +00:00
|
|
|
/**************************************************************************
|
|
|
|
MISC Support Routines
|
|
|
|
**************************************************************************/
|
|
|
|
|
|
|
|
#include "etherboot.h"
|
2005-04-08 15:01:17 +00:00
|
|
|
#include "console.h"
|
2005-03-08 18:53:11 +00:00
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
IPCHKSUM - Checksum IP Header
|
|
|
|
**************************************************************************/
|
|
|
|
uint16_t ipchksum(const void *data, unsigned long length)
|
|
|
|
{
|
|
|
|
unsigned long sum;
|
|
|
|
unsigned long i;
|
|
|
|
const uint8_t *ptr;
|
|
|
|
|
|
|
|
/* In the most straight forward way possible,
|
|
|
|
* compute an ip style checksum.
|
|
|
|
*/
|
|
|
|
sum = 0;
|
|
|
|
ptr = data;
|
|
|
|
for(i = 0; i < length; i++) {
|
|
|
|
unsigned long value;
|
|
|
|
value = ptr[i];
|
|
|
|
if (i & 1) {
|
|
|
|
value <<= 8;
|
|
|
|
}
|
|
|
|
/* Add the new value */
|
|
|
|
sum += value;
|
|
|
|
/* Wrap around the carry */
|
|
|
|
if (sum > 0xFFFF) {
|
|
|
|
sum = (sum + (sum >> 16)) & 0xFFFF;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return (~cpu_to_le16(sum)) & 0xFFFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
uint16_t add_ipchksums(unsigned long offset, uint16_t sum, uint16_t new)
|
|
|
|
{
|
|
|
|
unsigned long checksum;
|
|
|
|
sum = ~sum & 0xFFFF;
|
|
|
|
new = ~new & 0xFFFF;
|
|
|
|
if (offset & 1) {
|
|
|
|
/* byte swap the sum if it came from an odd offset
|
|
|
|
* since the computation is endian independant this
|
|
|
|
* works.
|
|
|
|
*/
|
|
|
|
new = bswap_16(new);
|
|
|
|
}
|
|
|
|
checksum = sum + new;
|
|
|
|
if (checksum > 0xFFFF) {
|
|
|
|
checksum -= 0xFFFF;
|
|
|
|
}
|
|
|
|
return (~checksum) & 0xFFFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
RANDOM - compute a random number between 0 and 2147483647L or 2147483562?
|
|
|
|
**************************************************************************/
|
|
|
|
int32_t random(void)
|
|
|
|
{
|
|
|
|
static int32_t seed = 0;
|
|
|
|
int32_t q;
|
|
|
|
if (!seed) /* Initialize linear congruential generator */
|
|
|
|
seed = currticks() + *(int32_t *)&arptable[ARP_CLIENT].node
|
|
|
|
+ ((int16_t *)arptable[ARP_CLIENT].node)[2];
|
|
|
|
/* simplified version of the LCG given in Bruce Schneier's
|
|
|
|
"Applied Cryptography" */
|
|
|
|
q = seed/53668;
|
|
|
|
if ((seed = 40014*(seed-53668*q) - 12211*q) < 0) seed += 2147483563L;
|
|
|
|
return seed;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
POLL INTERRUPTIONS
|
|
|
|
**************************************************************************/
|
|
|
|
void poll_interruptions(void)
|
|
|
|
{
|
|
|
|
int ch;
|
|
|
|
if ( ! as_main_program ) return;
|
|
|
|
/* If an interruption has occured restart etherboot */
|
|
|
|
if (iskey() && (ch = getchar(), (ch == K_ESC) || (ch == K_EOF) || (ch == K_INTR))) {
|
|
|
|
int state = (ch != K_INTR)? -1 : -3;
|
|
|
|
longjmp(restart_etherboot, state);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
SLEEP
|
|
|
|
**************************************************************************/
|
|
|
|
void sleep(int secs)
|
|
|
|
{
|
|
|
|
unsigned long tmo;
|
|
|
|
|
|
|
|
for (tmo = currticks()+secs*TICKS_PER_SEC; currticks() < tmo; ) {
|
|
|
|
poll_interruptions();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
INTERRUPTIBLE SLEEP
|
|
|
|
**************************************************************************/
|
|
|
|
void interruptible_sleep(int secs)
|
|
|
|
{
|
|
|
|
printf("<sleep>\n");
|
|
|
|
return sleep(secs);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
TWIDDLE
|
|
|
|
**************************************************************************/
|
|
|
|
void twiddle(void)
|
|
|
|
{
|
|
|
|
#ifdef BAR_PROGRESS
|
|
|
|
static int count=0;
|
|
|
|
static const char tiddles[]="-\\|/";
|
|
|
|
static unsigned long lastticks = 0;
|
|
|
|
unsigned long ticks;
|
|
|
|
#endif
|
|
|
|
if ( ! as_main_program ) return;
|
|
|
|
#ifdef BAR_PROGRESS
|
|
|
|
/* Limit the maximum rate at which characters are printed */
|
|
|
|
ticks = currticks();
|
|
|
|
if ((lastticks + (TICKS_PER_SEC/18)) > ticks)
|
|
|
|
return;
|
|
|
|
lastticks = ticks;
|
|
|
|
|
|
|
|
putchar(tiddles[(count++)&3]);
|
|
|
|
putchar('\b');
|
|
|
|
#else
|
|
|
|
putchar('.');
|
|
|
|
#endif /* BAR_PROGRESS */
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
STRCASECMP (not entirely correct, but this will do for our purposes)
|
|
|
|
**************************************************************************/
|
|
|
|
int strcasecmp(const char *a, const char *b)
|
|
|
|
{
|
|
|
|
while (*a && *b && (*a & ~0x20) == (*b & ~0x20)) {a++; b++; }
|
|
|
|
return((*a & ~0x20) - (*b & ~0x20));
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
INET_ATON - Convert an ascii x.x.x.x to binary form
|
|
|
|
**************************************************************************/
|
|
|
|
int inet_aton(const char *start, in_addr *i)
|
|
|
|
{
|
|
|
|
const char *p = start;
|
|
|
|
const char *digits_start;
|
|
|
|
unsigned long ip = 0;
|
|
|
|
unsigned long val;
|
|
|
|
int j;
|
|
|
|
for(j = 0; j <= 3; j++) {
|
|
|
|
digits_start = p;
|
|
|
|
val = strtoul(p, &p, 10);
|
|
|
|
if ((p == digits_start) || (val > 255)) return 0;
|
|
|
|
if ( ( j < 3 ) && ( *(p++) != '.' ) ) return 0;
|
|
|
|
ip = (ip << 8) | val;
|
|
|
|
}
|
|
|
|
i->s_addr = htonl(ip);
|
|
|
|
return p - start;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned long strtoul(const char *p, const char **endp, int base)
|
|
|
|
{
|
|
|
|
unsigned long ret = 0;
|
|
|
|
if (base != 10) return 0;
|
|
|
|
while((*p >= '0') && (*p <= '9')) {
|
|
|
|
ret = ret*10 + (*p - '0');
|
|
|
|
p++;
|
|
|
|
}
|
|
|
|
if (endp)
|
|
|
|
*endp = p;
|
|
|
|
return(ret);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#if DEBUG_UTILS
|
|
|
|
|
|
|
|
void pause ( void ) {
|
|
|
|
printf ( "\nPress a key" );
|
|
|
|
getchar();
|
|
|
|
printf ( "\r \r" );
|
|
|
|
}
|
|
|
|
|
|
|
|
void more ( void ) {
|
|
|
|
printf ( "---more---" );
|
|
|
|
getchar();
|
|
|
|
printf ( "\r \r" );
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Produce a paged hex dump of the specified data and length */
|
|
|
|
void hex_dump ( const char *data, const unsigned int len ) {
|
|
|
|
unsigned int index;
|
|
|
|
for ( index = 0; index < len; index++ ) {
|
|
|
|
if ( ( index % 16 ) == 0 ) {
|
|
|
|
printf ( "\n" );
|
|
|
|
}
|
|
|
|
if ( ( index % 368 ) == 352 ) {
|
|
|
|
more();
|
|
|
|
}
|
|
|
|
if ( ( index % 16 ) == 0 ) {
|
|
|
|
printf ( "%X [%X] : %hX :", data + index,
|
|
|
|
virt_to_phys ( data + index ), index );
|
|
|
|
}
|
|
|
|
printf ( " %hhX", data[index] );
|
|
|
|
}
|
|
|
|
printf ( "\n" );
|
|
|
|
}
|
|
|
|
|
|
|
|
#define GUARD_SYMBOL ( ( 'M' << 24 ) | ( 'I' << 16 ) | ( 'N' << 8 ) | 'E' )
|
|
|
|
/* Fill a region with guard markers. We use a 4-byte pattern to make
|
|
|
|
* it less likely that check_region will find spurious 1-byte regions
|
|
|
|
* of non-corruption.
|
|
|
|
*/
|
|
|
|
void guard_region ( void *region, size_t len ) {
|
|
|
|
uint32_t offset = 0;
|
|
|
|
|
|
|
|
len &= ~0x03;
|
|
|
|
for ( offset = 0; offset < len ; offset += 4 ) {
|
|
|
|
*((uint32_t *)(region + offset)) = GUARD_SYMBOL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check a region that has been guarded with guard_region() for
|
|
|
|
* corruption.
|
|
|
|
*/
|
|
|
|
int check_region ( void *region, size_t len ) {
|
|
|
|
uint8_t corrupted = 0;
|
|
|
|
uint8_t in_corruption = 0;
|
|
|
|
uint32_t offset = 0;
|
|
|
|
uint32_t test = 0;
|
|
|
|
|
|
|
|
len &= ~0x03;
|
|
|
|
for ( offset = 0; offset < len ; offset += 4 ) {
|
|
|
|
test = *((uint32_t *)(region + offset)) = GUARD_SYMBOL;
|
|
|
|
if ( ( in_corruption == 0 ) &&
|
|
|
|
( test != GUARD_SYMBOL ) ) {
|
|
|
|
/* Start of corruption */
|
|
|
|
if ( corrupted == 0 ) {
|
|
|
|
corrupted = 1;
|
|
|
|
printf ( "Region %#x-%#x (physical %#x-%#x) "
|
|
|
|
"corrupted\n",
|
|
|
|
region, region + len,
|
|
|
|
virt_to_phys ( region ),
|
|
|
|
virt_to_phys ( region + len ) );
|
|
|
|
}
|
|
|
|
in_corruption = 1;
|
|
|
|
printf ( "--- offset %#x ", offset );
|
|
|
|
} else if ( ( in_corruption != 0 ) &&
|
|
|
|
( test == GUARD_SYMBOL ) ) {
|
|
|
|
/* End of corruption */
|
|
|
|
in_corruption = 0;
|
|
|
|
printf ( "to offset %#x", offset );
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
if ( in_corruption != 0 ) {
|
|
|
|
printf ( "to offset %#x (end of region)\n", len-1 );
|
|
|
|
}
|
|
|
|
return corrupted;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* DEBUG_UTILS */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Local variables:
|
|
|
|
* c-basic-offset: 8
|
|
|
|
* End:
|
|
|
|
*/
|