135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
/*
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* split LOAD/Flash images from Siemens SE505
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*
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* (c) 01/2005 Olaf Rempel <razzor at kopf minus tisch dot de>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include "trxhdr.h"
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#define BUFSIZE 32768
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int main(int argc, char *argv[]) {
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struct trx_header trx;
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int i = 1, len, cnt;
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FILE *fp, *out;
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char *buf, filename[128];
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if (argc <= 1) {
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printf("USAGE: split_image firmware.img\n");
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exit(-1);
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}
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// open file
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if ((fp = fopen(argv[1], "r")) < 0) {
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perror(argv[1]);
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exit(-1);
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}
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// read main header
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if ((cnt = fread(&trx, 1, sizeof(struct trx_header), fp)) < 0) {
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perror(argv[1]);
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fclose(fp);
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exit(-1);
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} else if (cnt < sizeof(struct trx_header)) {
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fprintf(stderr, "Truncated file: %s\n", argv[1]);
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fclose(fp);
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exit(-1);
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} else if (trx.magic != FILE_MAGIC || trx.len > FILE_MAX_LEN || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad LOAD Header: %s\n", argv[1]);
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fclose(fp);
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exit(-1);
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}
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len = trx.len - sizeof(struct trx_header);
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if ((buf = malloc(BUFSIZE)) == NULL) {
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perror("malloc");
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exit(-1);
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}
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while (len > 0) {
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// read header
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if ((cnt = fread(&trx, 1, sizeof(struct trx_header), fp)) < 0) {
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perror(argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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} else if (cnt < sizeof(struct trx_header)) {
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fprintf(stderr, "Truncated file: %s\n", argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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} else if (trx.magic == TRX_MAGIC) {
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if (trx.len > TRX_MAX_LEN || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad TRX Header: %s\n", argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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}
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} else if (trx.magic == PMON_MAGIC) {
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if (trx.len > PMON_MAX_LEN || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad PMON Header: %s\n", argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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}
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} else if (trx.magic == NVAR_MAGIC) {
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if (trx.len > NVRAM_MAX_LEN || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad NVRAM Header: %s\n", argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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}
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} else {
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fprintf(stderr, "Unknown Header Type: %s\n", argv[1]);
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free(buf);
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fclose(fp);
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exit(-1);
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}
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// bad bad (unknown length)
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snprintf(filename, sizeof(filename), "%s.%d.trx", argv[1], i++);
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// open file
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if ((out = fopen(filename, "w")) < 0) {
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perror(filename);
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free(buf);
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exit(-1);
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}
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printf("%s : %d bytes\n", filename, trx.len);
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fwrite(&trx, 1, sizeof(struct trx_header), out);
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len -= trx.len;
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trx.len -= sizeof(struct trx_header);
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while (trx.len > 0 && cnt > 0) {
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cnt = fread(buf, 1, (trx.len <= BUFSIZE ? trx.len : BUFSIZE), fp);
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fwrite(buf, 1, cnt, out);
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trx.len -= cnt;
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}
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fclose(out);
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}
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free(buf);
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fclose(fp);
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return 0;
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}
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