mirror of https://github.com/hak5/openwrt-owl.git
firmware-utils: add Gemtek header tool
Generates webflash-compatible images for a few RT2880 routers based on Gemtek OEM boards. Signed-off-by: Claudio Leite <leitec@staticky.com> SVN-Revision: 40551owl
John Crispin
parent
cb91087991
commit
3208d0d7b7
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@ -66,6 +66,7 @@ define Host/Compile
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$(call cc,mkporayfw, -Wall)
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$(call cc,mkporayfw, -Wall)
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#$(call cc,mkhilinkfw, -lcrypto)
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#$(call cc,mkhilinkfw, -lcrypto)
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$(call cc,mkdcs932, -Wall)
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$(call cc,mkdcs932, -Wall)
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$(call cc,mkheader_gemtek,-lz)
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endef
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endef
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define Host/Install
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define Host/Install
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@ -0,0 +1,211 @@
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/*
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* Copyright (C) 2014 Claudio Leite <leitec@staticky.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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 GNU
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* 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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* Builds a proper flash image for routers using some Gemtek
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* OEM boards. These include the Airlink101 AR725W, the
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* Asante SmartHub 600 (AWRT-600N), and Linksys WRT100/110.
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*
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* The resulting image is compatible with the factory firmware
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* web upgrade and TFTP interface.
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*
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* To build:
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* gcc -O2 -o mkheader_gemtek mkheader_gemtek.c -lz
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*
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* Claudio Leite <leitec@staticky.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <zlib.h> /* for crc32() */
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/*
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* The header is in little-endian format. In case
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* we are on a BE host, we need to swap binary
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* values.
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*/
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#ifdef __APPLE__
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# include <libkern/OSByteOrder.h>
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# define le32 OSSwapHostToLittleInt32
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#else
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# if defined(__linux__)
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# include <endian.h>
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# if __BYTE_ORDER == __BIG_ENDIAN
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# define CPU_BIG_ENDIAN
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# endif
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# else
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# include <sys/endian.h> /* BSD's should have this */
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# if _BYTE_ORDER == _BIG_ENDIAN
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# define CPU_BIG_ENDIAN
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# endif
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# endif
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# ifdef CPU_BIG_ENDIAN
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# define le32(x) (((x & 0xff000000) >> 24) | \
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((x & 0x00ff0000) >> 8) | \
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((x & 0x0000ff00) << 8) | \
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((x & 0x000000ff) << 24))
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# else
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# define le32(x) (x)
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# endif
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#endif
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struct gemtek_header {
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uint8_t magic[4];
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uint8_t version[4];
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uint32_t product_id;
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uint32_t imagesz;
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uint32_t checksum;
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uint32_t fast_checksum;
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uint8_t build[4];
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uint8_t lang[4];
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};
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#define HDRLEN sizeof(struct gemtek_header)
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struct machines {
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char *desc;
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char *id;
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uint32_t maxsize;
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struct gemtek_header header;
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};
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struct machines mach_def[] = {
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{"Airlink101 AR725W", "ar725w", 0x340000,
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{"GMTK", "1003", le32(0x03000001), 0, 0,
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0, "01\0\0", "EN\0\0"}},
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{"Asante AWRT-600N", "awrt600n", 0x340000,
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{"A600", "1005", le32(0x03000001), 0, 0,
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0, "01\0\0", "EN\0\0"}},
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{"Linksys WRT100", "wrt100", 0x320000,
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{"GMTK", "1007", le32(0x03040001), 0, 0,
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0, "2\0\0\0", "EN\0\0"}},
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{"Linksys WRT110", "wrt110", 0x320000,
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{"GMTK", "1007", le32(0x03040001), 0, 0,
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0, "2\0\0\0", "EN\0\0"}},
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{0}
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};
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int
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main(int argc, char *argv[])
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{
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unsigned long res, flen;
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struct gemtek_header my_hdr;
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FILE *f, *f_out;
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int image_type = -1, index;
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uint8_t *buf;
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uint32_t crc;
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if (argc < 3) {
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fprintf(stderr, "mkheader_gemtek <uImage> <webflash image> [machine ID]\n");
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fprintf(stderr, " where [machine ID] is one of:\n");
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for (index = 0; mach_def[index].desc != 0; index++) {
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fprintf(stderr, " %-10s %s", mach_def[index].id, mach_def[index].desc);
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if (index == 0)
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fprintf(stderr, " (default)\n");
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else
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fprintf(stderr, "\n");
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}
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exit(-1);
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}
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if (argc == 4) {
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for(index = 0; mach_def[index].id != 0; index++) {
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if(strcmp(mach_def[index].id, argv[3]) == 0) {
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image_type = index;
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break;
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}
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}
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if(image_type == -1) {
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fprintf(stderr, "\nERROR: invalid machine type\n");
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exit(-1);
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}
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} else
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image_type = 0;
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printf("Opening %s...\n", argv[1]);
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f = fopen(argv[1], "r");
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if(!f) {
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fprintf(stderr, "\nERROR: couldn't open input image\n");
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exit(-1);
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}
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fseek(f, 0, SEEK_END);
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flen = (unsigned long) ftell(f);
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printf(" %lu (0x%lX) bytes long\n", flen, flen);
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if (flen > mach_def[image_type].maxsize) {
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fprintf(stderr, "\nERROR: image exceeds maximum compatible size\n");
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goto f_error;
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}
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buf = malloc(flen + HDRLEN);
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if (!buf) {
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fprintf(stderr, "\nERROR: couldn't allocate buffer\n");
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goto f_error;
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}
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rewind(f);
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res = fread(buf + HDRLEN, 1, flen, f);
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if (res != flen) {
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perror("Couldn't read entire file: fread()");
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goto f_error;
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}
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fclose(f);
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printf("\nCreating %s...\n", argv[2]);
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memcpy(&my_hdr, &mach_def[image_type].header, HDRLEN);
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printf(" Using %s magic\n", mach_def[image_type].desc);
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my_hdr.imagesz = le32(flen + HDRLEN);
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memcpy(my_hdr.lang, "EN", 2);
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memcpy(buf, &my_hdr, HDRLEN);
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crc = crc32(0, buf, flen + HDRLEN);
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printf(" CRC32: %08X\n", crc);
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my_hdr.checksum = le32(crc);
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memcpy(buf, &my_hdr, HDRLEN);
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printf(" Writing...\n");
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f_out = fopen(argv[2], "w");
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if(!f_out) {
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fprintf(stderr, "\nERROR: couldn't open output image\n");
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exit(-1);
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}
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fwrite(buf, 1, flen + HDRLEN, f_out);
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fclose(f_out);
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free(buf);
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return 0;
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f_error:
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fclose(f);
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exit(-1);
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}
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