+# $(1): file to read magic from
+# $(2): offset in bytes
+get_magic_long_at() {
+ dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
+}
+
+platform_machine() {
+ grep "machine" /proc/cpuinfo | sed "s/.*:[ \t]*//"
+}
+
+platform_expected_image() {
+ local machine=$(platform_machine)
+
+ case "$machine" in
+ "Netgear WGR614 V8") echo "chk U12H072T00_NETGEAR"; return;;
+ "Netgear WGR614 V9") echo "chk U12H094T00_NETGEAR"; return;;
+ "Netgear WGR614 V10") echo "chk U12H139T01_NETGEAR"; return;;
+ "Netgear WNDR3300") echo "chk U12H093T00_NETGEAR"; return;;
+ "Netgear WNDR3400 V1") echo "chk U12H155T00_NETGEAR"; return;;
+ "Netgear WNDR3400 V2") echo "chk U12H187T00_NETGEAR"; return;;
+ "Netgear WNDR3400 V3") echo "chk U12H208T00_NETGEAR"; return;;
+ "Netgear WNDR3400 Vcna") echo "chk U12H155T01_NETGEAR"; return;;
+ "Netgear WNDR3700 V3") echo "chk U12H194T00_NETGEAR"; return;;
+ "Netgear WNDR4000") echo "chk U12H181T00_NETGEAR"; return;;
+ "Netgear WNDR4500 V1") echo "chk U12H189T00_NETGEAR"; return;;
+ "Netgear WNDR4500 V2") echo "chk U12H224T00_NETGEAR"; return;;
+ "Netgear WNR2000 V2") echo "chk U12H114T00_NETGEAR"; return;;
+ "Netgear WNR3500L") echo "chk U12H136T99_NETGEAR"; return;;
+ "Netgear WNR3500U") echo "chk U12H136T00_NETGEAR"; return;;
+ "Netgear WNR3500 V2") echo "chk U12H127T00_NETGEAR"; return;;
+ "Netgear WNR3500 V2vc") echo "chk U12H127T70_NETGEAR"; return;;
+ "Netgear WNR834B V2") echo "chk U12H081T00_NETGEAR"; return;;
+ "Linksys E900 V1") echo "cybertan E900"; return;;
+ "Linksys E1000 V1") echo "cybertan E100"; return;;
+ "Linksys E1000 V2") echo "cybertan E100"; return;;
+ "Linksys E1000 V2.1") echo "cybertan E100"; return;;
+ "Linksys E1200 V2") echo "cybertan E122"; return;;
+ "Linksys E2000 V1") echo "cybertan 32XN"; return;;
+ "Linksys E3000 V1") echo "cybertan 61XN"; return;;
+ "Linksys E3200 V1") echo "cybertan 3200"; return;;
+ "Linksys E4200 V1") echo "cybertan 4200"; return;;
+ "Linksys WRT150N V1.1") echo "cybertan N150"; return;;
+ "Linksys WRT150N V1") echo "cybertan N150"; return;;
+ "Linksys WRT160N V1") echo "cybertan N150"; return;;
+ "Linksys WRT160N V3") echo "cybertan N150"; return;;
+ "Linksys WRT300N V1.1") echo "cybertan EWCB"; return;;
+ "Linksys WRT310N V1") echo "cybertan 310N"; return;;
+ "Linksys WRT310N V2") echo "cybertan 310N"; return;;
+ "Linksys WRT610N V1") echo "cybertan 610N"; return;;
+ "Linksys WRT610N V2") echo "cybertan 610N"; return;;
+ esac
+}
+
+brcm47xx_identify() {
+ local magic
+
+ magic=$(get_magic_long "$1")
+ case "$magic" in
+ "48445230")
+ echo "trx"
+ return
+ ;;
+ "2a23245e")
+ echo "chk"
+ return
+ ;;
+ esac
+
+ magic=$(get_magic_long_at "$1" 14)
+ [ "$magic" = "55324e44" ] && {
+ echo "cybertan"
+ return
+ }
+
+ echo "unknown"
+}
+