bcm53xx: compare provided firmware magic with device magic
authorRafał Miłecki <zajec5@gmail.com>
Tue, 7 Apr 2015 14:13:56 +0000 (14:13 +0000)
committerRafał Miłecki <zajec5@gmail.com>
Tue, 7 Apr 2015 14:13:56 +0000 (14:13 +0000)
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 45290

target/linux/bcm53xx/base-files/lib/upgrade/platform.sh

index 3d911d1..17456b6 100644 (file)
@@ -6,6 +6,10 @@ get_magic_long_at() {
        dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
 }
 
+platform_machine() {
+       cat /proc/device-tree/compatible | tr '\0' '\t' | cut -f 1
+}
+
 platform_flash_type() {
        # On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
        grep -q "\"rootfs\"" /proc/mtd && {
@@ -16,6 +20,16 @@ platform_flash_type() {
        echo "nand"
 }
 
+platform_expected_image() {
+       local machine=$(platform_machine)
+
+       case "$machine" in
+               "netgear,r6250v1")      echo "chk U12H245T00_NETGEAR"; return;;
+               "netgear,r6300v2")      echo "chk U12H240T00_NETGEAR"; return;;
+               "netgear,r8000")        echo "chk U12H315T00_NETGEAR"; return;;
+       esac
+}
+
 platform_identify() {
        local magic
 
@@ -49,14 +63,21 @@ platform_check_image() {
        }
 
        local file_type=$(platform_identify "$1")
+       local magic
 
        case "$file_type" in
                "chk")
                        local header_len=$((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_image)
                        echo "Found CHK image with device board_id $board_id"
 
+                       [ -n "$dev_board_id" -a "chk $board_id" != "$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")
                        [ "$magic" != "48445230" ] && {
                                echo "No valid TRX firmware in the CHK image"
@@ -66,8 +87,14 @@ platform_check_image() {
                        return 0
                ;;
                "cybertan")
-                       local magic=$(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_image)
+                       echo "Found CyberTAN image with device pattern: $pattern"
+
+                       [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
+                               echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
+                               return 1
+                       }
 
                        magic=$(get_magic_long_at "$1" 32)
                        [ "$magic" != "48445230" ] && {