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brcm47xx: compare provided firmware magic with device magic

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This makes sysupgrade reject firmware images for different devices.
Right now only support for 2 sample devices is implemented.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45170
This commit is contained in:
Rafał Miłecki 2015-03-30 22:06:11 +00:00
parent a54b8303d2
commit b34040f990
1 changed files with 34 additions and 2 deletions
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36
target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
View file

@ -6,6 +6,26 @@ get_magic_long_at() {
dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
}
platform_machine() {
grep "machine" /proc/cpuinfo | sed "s/.*:[ \t]*//"
}
platform_expected_chk_board_id() {
local machine=$(platform_machine)
case "$machine" in
"Netgear WNDR4000") echo "U12H181T00_NETGEAR"; return;;
esac
}
platform_expected_cybertan_pattern() {
local machine=$(platform_machine)
case "$machine" in
"Linksys E1000 V2.1") echo "E100"; return;;
esac
}
brcm47xx_identify() {
local magic
@ -41,8 +61,14 @@ platform_check_image() {
local header_len=$((0x$(get_magic_long_at "$1" 4)))
local board_id_len=$(($header_len - 40))
local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
local dev_board_id=$(platform_expected_chk_board_id)
echo "Found CHK image with device board_id $board_id"
[ -n "$dev_board_id" -a "$board_id" != "$dev_board_id" ] && {
echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
return 1
}
magic=$(get_magic_long_at "$1" "$header_len")
[ "$magic" != "48445230" ] && {
echo "No valid TRX firmware in the CHK image"
@ -52,8 +78,14 @@ platform_check_image() {
return 0
;;
"cybertan")
magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
echo "Found CyberTAN image with device magic: $magic"
local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
local dev_pattern=$(platform_expected_cybertan_pattern)
echo "Found CyberTAN image with device pattern: $pattern"
[ -n "$dev_pattern" -a "$pattern" != "$dev_pattern" ] && {
echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
return 1
}
magic=$(get_magic_long_at "$1" 32)
[ "$magic" != "48445230" ] && {