|
|
| Line 1: |
Line 1: |
| − | This code simply returns the initial checksum of a UVSG command, provided you (1) give it a sample command that ends in $00 <checksum> and (2) strip off the 55 AA at the beginning. It's probably poorly written, but it works.
| + | Shove it up your ass, since you are not allowed to see this page. |
| | | | |
| − | <code>
| + | [[File:IPRC_Seized_2010_11.gif]] |
| − | #import <stdio.h>
| |
| − |
| |
| − | int main(int argc, char *argv[]) {
| |
| − | int i=0, j, checksum;
| |
| − | char *buf = "<PUT AN EXAMPLE COMMAND HERE>";
| |
| − | char *hexPtr = buf;
| |
| − |
| |
| − | unsigned int *result = calloc(strlen(buf)/2 + 1, sizeof *result);
| |
| − | while (sscanf(hexPtr, "%02x", &result[i++])) {
| |
| − | hexPtr += 2;
| |
| − | if (hexPtr >= buf + strlen(buf)) break;
| |
| − | }
| |
| − |
| |
| − | for (j = i; j > -1; j--) {
| |
| − | if (j == (i-1)) {
| |
| − | checksum = (int)result[j];
| |
| − | }
| |
| − | if (j < (i-1)) {
| |
| − | checksum = checksum ^ (int)result[j];
| |
| − | }
| |
| − | }
| |
| − |
| |
| − | printf("\n%02x\n", checksum);
| |
| − | }
| |
| − | </code>
| |
Revision as of 06:24, 25 January 2011
