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Diffstat (limited to 'tools/firmware-utils/src/encode_crc.c')
-rw-r--r-- | tools/firmware-utils/src/encode_crc.c | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/tools/firmware-utils/src/encode_crc.c b/tools/firmware-utils/src/encode_crc.c deleted file mode 100644 index 80f44f133e..0000000000 --- a/tools/firmware-utils/src/encode_crc.c +++ /dev/null @@ -1,138 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* ************************************************************************** - - This program creates a CRC checksum and encodes the file that is named - in the command line. - - Compile with: gcc encode_crc.c -Wall -o encode_crc - - Author: Michael Margraf (michael.margraf@freecom.com) - Copyright: Freecom Technology GmbH, Berlin, 2004 - www.freecom.com - - ************************************************************************* */ - - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> - -// ******************************************************************* -// CCITT polynom G(x)=x^16+x^12+x^5+1 -#define POLYNOM 0x1021 - -// CRC algorithm with MSB first -int make_crc16(int crc, char new) -{ - int i; - crc = crc ^ (((int)new) << 8); - - for(i=0; i<8; i++) { // work on 8 bits in "new" - crc <<= 1; // MSBs first - if(crc & 0x10000) crc ^= POLYNOM; - } - return crc & 0xFFFF; -} - -// ******************************************************************* -// Reads the file "filename" into memory and returns pointer to the buffer. -static char *readfile(char *filename, int *size) -{ - FILE *fp; - char *buffer; - struct stat info; - - if (stat(filename,&info)!=0) - return NULL; - - if ((fp=fopen(filename,"r"))==NULL) - return NULL; - - buffer=NULL; - for (;;) - { - if ((buffer=(char *)malloc(info.st_size+1))==NULL) - break; - - if (fread(buffer,1,info.st_size,fp)!=info.st_size) - { - free(buffer); - buffer=NULL; - break; - } - - buffer[info.st_size]='\0'; - if(size) *size = info.st_size; - - break; - } - - (void)fclose(fp); - - return buffer; -} - - -// ******************************************************************* -int main(int argc, char** argv) -{ - if(argc < 3) { - printf("ERROR: Argument missing!\n\n"); - return 1; - } - - int count; // size of file in bytes - char *p, *master = readfile(argv[1], &count); - if(!master) { - printf("ERROR: File not found!\n"); - return 1; - } - - int crc = 0xFFFF, z; - - p = master; - for(z=0; z<count; z++) - crc = make_crc16(crc, *(p++)); // calculate CRC - short crc16 = (short)crc; - - /* - if(argc > 2) { // with flag for device recognition ? - p = argv[2]; - for(z=strlen(p); z>0; z--) { - crc ^= (int)(*p); - *(p++) = (char)crc; // encode device flag - } - } - */ - - p = master; - for(z=0; z<count; z++) { - crc ^= (int)(*p); - *(p++) = (char)crc; // encode file - } - - - // write encoded file... - FILE *fp = fopen(argv[2], "w"); - if(!fp) { - printf("ERROR: File not writeable!\n"); - return 1; - } - - if(argc > 3) { // add flag for device recognition ? - fwrite(argv[3], strlen(argv[3]), sizeof(char), fp); - } - else { - // Device is an FSG, so byte swap (IXP4xx is big endian) - crc16 = ((crc16 >> 8) & 0xFF) | ((crc16 << 8) & 0xFF00); - } - - fwrite(&crc16, 1, sizeof(short), fp); // first write CRC - - fwrite(master, count, sizeof(char), fp); // write content - fclose(fp); - - free(master); - return 0; -} |