From 6fc334cbdc2b1716786768c545b761b338962b43 Mon Sep 17 00:00:00 2001 From: Tony Ambardar Date: Thu, 1 Dec 2022 18:00:30 -0800 Subject: [PATCH] ipq40xx: sysupgrade: allow flashing Linksys factory firmware Allow forced flashing of a factory firmware image, after checking for the correct FIT magic header and Linksys board-specific footer. Details of the footer are already described in scripts/linksys-image.sh. This is convenient as it avoids using a TFTP server or OEM GUI, and allows restoring OEM firmware or installing a "breaking" OpenWrt update (e.g DSA migration and kernel repartition) directly from the command line. Devices supported at this time include EA6350v3, EA8300, MR8300 and WHW01. Reviewed-by: Robert Marko Tested-by: Wyatt Martin # WHW01 Tested-by: Tony Ambardar # EA6350v3 Signed-off-by: Tony Ambardar --- .../ipq40xx/base-files/lib/upgrade/linksys.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) mode change 100755 => 100644 target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh diff --git a/target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh b/target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh old mode 100755 new mode 100644 index f1dc81f7c9..5d25c20ad7 --- a/target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh +++ b/target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh @@ -47,6 +47,14 @@ linksys_get_target_firmware() { esac } +linksys_is_factory_image() { + local board=$(board_name) + board=${board##*,} + + # check matching footer signature + tail -c 256 $1 | grep -q -i "\.LINKSYS\.........${board}" +} + platform_do_upgrade_linksys() { local magic_long="$(get_magic_long "$1")" @@ -99,4 +107,14 @@ platform_do_upgrade_linksys() { echo "writing \"$1\" image to \"$part_label\"" get_image "$1" | mtd write - "$part_label" } + + [ "$magic_long" = "d00dfeed" ] && { + if ! linksys_is_factory_image "$1"; then + echo "factory image doesn't match device" + return 1 + fi + + echo "writing \"$1\" factory image to \"$part_label\"" + get_image "$1" | mtd -e "$part_label" write - "$part_label" + } } -- 2.30.2