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rbextract: support devices directly showing ERD magic

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Older ath79-based MikroTik devices have the ERD calibration data
compressed and stored different to newer IPQ40xx ones. This commit
adds support for these former ones.

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Acked-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
This commit is contained in:
Roger Pueyo Centelles 2019-11-28 13:29:12 +01:00 committed by Adrian Schmutzler
parent ba730d61af
commit 7d39946ea0
2 changed files with 30 additions and 1 deletions
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3
package/utils/rbextract/Makefile
View File

@ -2,6 +2,7 @@
# Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
# Copyright (C) 2018 Chris Schimp <silverchris@gmail.com>
# Copyright (C) 2019 Robert Marko <robimarko@gmail.com>
# Copyright (C) 2019 Roger Pueyo Centelles <roger.pueyo@guifi.net>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@ -10,7 +11,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=rbextract
PKG_RELEASE:=1
PKG_RELEASE:=2
CMAKE_INSTALL:=1
include $(INCLUDE_DIR)/package.mk

28
package/utils/rbextract/src/rbextract.c
View File

@ -333,7 +333,35 @@ __rb_get_wlan_data(void)
goto err_free_rle_out;
}
}
/* Older ath79-based boards directly show the RB_MAGIC_ERD bytes followed by
the LZO-compressed calibration data with no RLE */
if (magic == RB_MAGIC_ERD) {
if (tag_len > RB_ART_SIZE) {
printf("Calibration data too large\n");
goto err_free_lzo_in;
}
err = routerboot_find_tag(tag, tag_len,
0x1, &buf_lzo_in, &erd_tag_len);
if (err) {
printf("No ERD chunk found\n");
goto err_free_lzo_out;
}
printf("Decompressing with LZO\n");
lzo_out_len = RB_ART_SIZE;
err = lzo1x_decompress_safe(buf_lzo_in, tag_len,
buf_lzo_out, &lzo_out_len, NULL);
/* For some reason, I get this "input not consumed" error
* even though the output is correct, so ignore it. */
if (err && err != LZO_E_INPUT_NOT_CONSUMED) {
printf("unable to decompress calibration data: %d\n",
err);
goto err_free_lzo_out;
}
buf_rle_out = buf_lzo_out;
}
return buf_rle_out;
err_free_rle_out: