NetBoot/bbraun-pram/NBPRAM.c
2020-06-20 09:33:04 +08:00

1 line
2.1 KiB
C

/*
* Initialize netboot pram
* - Rob Braun <bbraun@synack.net>
* 2012
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <Traps.h>
void get_netboot_pram(struct netboot *nb);
void set_netboot_pram(struct netboot *nb);
#pragma parameter __D0 ReadXPRam(__D0, __D1, __A0)
short ReadXPRam(short size, short offset, char *where) = {0x4840, 0x3001, _ReadXPRam};
#pragma parameter __D0 WriteXPRam(__D0, __D1, __A0)
short WriteXPRam(short size, short offset, char *where) = {0x4840, 0x3001, _WriteXPRam};
struct netboot {
char machineID; /* this is used as part of the boot protocol */
char protocol;
char errors;
char flags; /* Used to enable netbooting, and allow guest netbooting */
char intervalCount; /* high nibble is the retry count, low nibble is the interval between retries */
char timeout;
unsigned long signature[4];
char userName[31];
char password[8];
short serverID; /* the value here will be translated to ascii encoded hex and used as the server name to boot from. */
char padding[7];
};
void get_netboot_pram(struct netboot *nb) {
char *i = (char*)nb;
ReadXPRam(4, 4, i);
i += 4;
ReadXPRam(3, 0xAB, i);
i += 3;
ReadXPRam(1, 0xBC, i);
i++;
ReadXPRam(0x20, 0x20, i);
i += 0x20;
ReadXPRam(0x20, 0x8B, i);
return;
}
void set_netboot_pram(struct netboot *nb) {
char *i = (char*)nb;
WriteXPRam(4, 4, i);
i += 4;
WriteXPRam(3, 0xAB, i);
i += 3;
WriteXPRam(1, 0xBC, i);
i++;
WriteXPRam(0x20, 0x20, i);
i += 0x20;
WriteXPRam(0x20, 0x8B, i);
return;
}
void main(void)
{
struct netboot nb;
char *i;
int n;
memset(&nb, 0, sizeof(nb));
get_netboot_pram(&nb);
for(i = (char*)&nb, n = 0; n < sizeof(nb); n++) {
printf("0x%x ", i[n]);
}
printf("\n");
#if 1
memset(&nb, 0, sizeof(nb));
nb.machineID = 1;
nb.protocol = 1;
nb.errors = 0;
nb.flags = 0xC0;
nb.intervalCount = 0x24; /* low nibble is interval, high nibble is count for lookups */
nb.timeout = 127;
nb.signature[0] = 'PWD ';
//nb.userName[0] = '\0';
strcpy(nb.userName, "bbraun");
nb.password[0] = '\0';
nb.serverID = 0xEBAB;
set_netboot_pram(&nb);
#endif
}