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@@ -1,150 +0,0 @@
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-/*
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- * wndr3700.c - partially based on OpenWrt's add_header.c
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- *
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- * Copyright (C) 2009 Anael Orlinski <[email protected]>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License,
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- * version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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- */
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-
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-/*
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- * The add_header utility used by various vendors preprends the buf
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- * image with a header containing a CRC32 value which is generated for the
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- * model id + reserved space for CRC32 + buf, then replaces the reserved
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- * area with the actual CRC32. This replacement tool mimics this behavior.
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- */
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-
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-#include <stdio.h>
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-#include <stdlib.h>
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-#include <stddef.h>
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-#include <unistd.h>
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-#include <errno.h>
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-#include <fcntl.h>
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-#include <sys/mman.h>
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-#include <string.h>
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-#include <netinet/in.h>
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-#include <inttypes.h>
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-
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-#define BPB 8 /* bits/byte */
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-
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-#define WNDR3700_MAGIC_LEN 4
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-
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-static uint32_t crc32[1<<BPB];
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-static char *magic = "3700";
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-
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-static void init_crc32()
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-{
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- const uint32_t poly = ntohl(0x2083b8ed);
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- int n;
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-
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- for (n = 0; n < 1<<BPB; n++) {
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- uint32_t crc = n;
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- int bit;
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-
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- for (bit = 0; bit < BPB; bit++)
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- crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
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- crc32[n] = crc;
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- }
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-}
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-
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-static uint32_t crc32buf(unsigned char *buf, size_t len)
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-{
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- uint32_t crc = 0xFFFFFFFF;
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-
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- for (; len; len--, buf++)
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- crc = crc32[(uint8_t)crc ^ *buf] ^ (crc >> BPB);
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- return ~crc;
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-}
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-
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-struct header {
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- unsigned char magic[WNDR3700_MAGIC_LEN];
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- uint32_t crc;
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- unsigned char stuff[56];
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-};
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-
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-static void usage(const char *) __attribute__ (( __noreturn__ ));
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-
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-static void usage(const char *mess)
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-{
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- fprintf(stderr, "Error: %s\n", mess);
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- fprintf(stderr, "Usage: wndr3700 input_file output_file [magic]\n");
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- fprintf(stderr, "\n");
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- exit(1);
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-}
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-
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-int main(int argc, char **argv)
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-{
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- off_t len; // of original buf
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- off_t buflen; // of the output file
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- int fd;
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- void *input_file; // pointer to the input file (mmmapped)
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- struct header header;
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- unsigned char *buf; // pointer to prefix + copy of original buf
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-
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- // verify parameters
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-
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- if (argc < 3)
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- usage("wrong number of arguments");
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-
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- if (argc > 3)
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- magic = argv[3];
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-
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- if (strlen(magic) != WNDR3700_MAGIC_LEN) {
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- fprintf(stderr, "Invalid magic: '%s'\n", magic);
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- exit(1);
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- }
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-
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- // mmap input_file
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- if ((fd = open(argv[1], O_RDONLY)) < 0
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- || (len = lseek(fd, 0, SEEK_END)) < 0
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- || (input_file = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0)) == (void *) (-1)
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- || close(fd) < 0)
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- {
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- fprintf(stderr, "Error loading file %s: %s\n", argv[1], strerror(errno));
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- exit(1);
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- }
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-
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- buflen = len;
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-
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- init_crc32();
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-
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- // preload header
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- memcpy(&header, input_file, sizeof(header));
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-
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- memcpy(header.magic, magic, WNDR3700_MAGIC_LEN);
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- header.crc = 0;
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-
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- // create a firmware image in memory and copy the input_file to it
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- buf = malloc(buflen);
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- memcpy(buf, input_file, len);
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-
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- // CRC of temporary header
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- header.crc = htonl(crc32buf((unsigned char*)&header, sizeof(header)));
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-
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- memcpy(buf, &header, sizeof(header));
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-
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- // write the buf
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- if ((fd = open(argv[2], O_CREAT|O_WRONLY|O_TRUNC,0644)) < 0
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- || write(fd, buf, buflen) != buflen
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- || close(fd) < 0)
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- {
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- fprintf(stderr, "Error storing file %s: %s\n", argv[2], strerror(errno));
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- exit(2);
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- }
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-
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- free(buf);
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-
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- munmap(input_file,len);
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-
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- return 0;
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-}
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