Dynamically build TLV7 format from TLV6 info.
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101
gcd.py
101
gcd.py
@ -1,6 +1,8 @@
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Thanks to TurboCCC and kunix for all your work!
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GCD_SIG = b"GARMINd\00"
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from binascii import hexlify
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@ -35,6 +37,7 @@ running_cksum = 0
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all_cksum_ok = True
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last_type6_format = ""
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last_type6_fields = []
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last_type6_fids = []
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def add_to_cksum(payload):
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global running_cksum
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@ -88,92 +91,48 @@ def parseTLV3(payload):
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print(" > " + repr(payload))
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def parseTLV6(payload):
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global last_type6_format, last_type6_fields
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global last_type6_format, last_type6_fields, last_type6_fids
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# Describes following TLV7:
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# http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=137838&whichpage=12
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# First nibble might be data type: 0 = B, 1 = H, 2 = L
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FIELD_TYPES = {
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0x000a: ["B", "XOR flag/value"],
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0x000b: ["B", "Reboot/Downgrade flag"],
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0x000b: ["B", "Reset/Downgrade flag"],
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0x1009: ["H", "Device hw_id"],
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0x100a: ["H", "Block type"],
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0x100d: ["H", "Firmware version"],
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0x1014: ["H", "Field 1014"],
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0x1015: ["H", "Field 1015"],
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0x1016: ["H", "Field 1016 (WiFi fw)"],
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0x2015: ["L", "Block size"],
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0x5003: ["", "End of definition marker"],
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}
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# 0a 10 15 20 09 10 0d 10 03 50 - 10 - fenix_D2_tactix_500 (before 0008)
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# 0b 00 0a 00 0a 10 15 20 09 10 0d 10 03 50 - 14 - fenix_D2_tactix_500 (before 0555)
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# 0b 00 0a 00 0a 10 15 20 09 10 0d 10 03 50 - 14 - fenix_D2_tactix_500 (before 0557)
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# 0b 00 0a 00 0a 10 15 20 03 50 - 10 - fenix5Plus_SensorHub_220
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# 0b 00 0a 00 0a 10 15 20 03 50 - 10 - fenix5Plus_ANT_BLE_300
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# 0b 00 0a 00 0a 10 15 20 16 10 03 50 - 12 - fenix5Plus_WiFi_250
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5_1100 (before 0505)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5_1100 (before 02BD)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5Plus_420_rollback.gcd (has only 1 Type 02BD)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5Plus_420.gcd (before Type 0505)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5Plus_420.gcd (before Type 02BD)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5Plus_510.gcd (before Type 0505)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - fenix5Plus_510.gcd (before Type 02BD)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - D2Delta_300 (before 0505)
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# 0b 00 0a 00 0a 10 15 20 09 10 14 10 15 10 0d 10 03 50 - 18 - D2Delta_300 (before 02BD)
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print(" > " + " ".join("{:02x}".format(c) for c in payload))
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#print(hexlify(payload).decode("utf-8"))
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print(" > " + repr(payload))
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if len(payload) % 2 != 0:
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print(" ! Invalid payload length!")
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last_type6_format = ""
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last_type6_fields = []
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for i in range(0, len(payload), 2):
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fid = unpack("H", payload[i:i+2])[0]
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fdef = FIELD_TYPES[fid]
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print(" - {:04x}: {}".format(fid, fdef[1]))
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last_type6_fids.append(fid)
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last_type6_format += fdef[0]
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last_type6_fields.append(fdef[1])
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def parseTLV7(payload):
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# fenix/D2/tactix: hwid 060f
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# fenix 5 Plus: hwid 0b54
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# D2 Delta: hwid 0c7c
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# 08 00 00 a2 04 00 0f 06 f4 01 - 10 - fenix_D2_tactix_500 (before 0008)
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# 00 00 55 05 00 c0 01 00 0f 06 f4 01 - 12 - fenix_D2_tactix_500 (before 0555)
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# 00 00 57 05 00 90 01 00 0f 06 f4 01 - 12 - fenix_D2_tactix_500 (before 0557)
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# 00 00 05 05 00 94 00 00 89 0a c8 00 4e 00 4c 04 - 16 - fenix5_1100 (before 0505)
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# 00 00 bd 02 00 46 3b 00 89 0a c8 00 4e 00 4c 04 - 16 - fenix5_1100 (before 02BD)
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# 01 00 01 04 0c 0e 06 00 - 8 - fenix5Plus_SensorHub_220 (before 0401)
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# 01 00 01 04 f7 0f 02 00 - 8 - fenix5Plus_ANT_BLE_300 (before 0401)
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# 00 00 01 04 e4 4f 06 00 40 33 - 10 - fenix5Plus_WiFi_250
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# 01 00 bd 02 00 2a 8d 00 54 0b c8 00 3b 00 a4 01 - 16 - fenix5Plus_420_rollback.gcd (has only 02BD)
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# 00 00 05 05 00 ce 00 00 54 0b c8 00 3b 00 a4 01 - 16 - fenix5Plus_420.gcd (before Type 0505)
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# 00 00 bd 02 00 2a 8d 00 54 0b c8 00 3b 00 a4 01 - 16 - fenix5Plus_420.gcd (before Type 02BD)
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# 00 00 05 05 00 ce 00 00 54 0b c8 00 3b 00 fe 01 - 16 - fenix5Plus_510.gcd (before Type 0505)
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# 00 00 bd 02 00 fa 93 00 54 0b c8 00 3b 00 fe 01 - 16 - fenix5Plus_510.gcd (before Type 02BD)
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# 00 00 05 05 00 ce 00 00 7c 0c c8 00 01 00 2c 01 - 16 - D2Delta_300.gcd (before Type 0505)
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# 00 00 bd 02 00 99 94 00 7c 0c c8 00 01 00 2c 01 - 16 - D2Delta_300.gcd (before Type 02BD)
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# ^^ ^^ ^___^ ^_________^ ^___^ ^___^
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# E X btype blength HWID FwVer
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erase = None
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xor = None
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hwid = None
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nn6 = None
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nn7 = None
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fwver = None
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if len(payload) == 16:
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(erase, xor, btype, blen, hwid, nn6, nn7, fwver) = unpack("<BBHLHHHH", payload)
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elif len(payload) == 12:
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(erase, xor, btype, blen, hwid, fwver) = unpack("<BBHLHH", payload)
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elif len(payload) == 10:
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(btype, blen, hwid, fwver) = unpack("<HLHH", payload)
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if btype == 0x0:
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# other format
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print(" ! First try to parse didn't make sense. Trying other format.")
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hwid = None # reset
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fwver = None # reset
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(erase, xor, btype, blen, nn6) = unpack("<BBHLH", payload)
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elif len(payload) == 8:
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(erase, xor, btype, blen) = unpack("<BBHL", payload)
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else:
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print("Type 7 not an expected length. ({} Bytes)".format(len(payload)))
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return
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if erase is not None: print(" - Reset/Downgrade flag?: {}".format(erase))
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if xor is not None: print(" - XOR flag?: {}".format(xor))
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print(" - Block type: {:04x}".format(btype))
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print(" - Block length: {:d} Bytes".format(blen))
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if hwid is not None: print(" - Device hw_id: 0x{:04x} / {:d} ({})".format(hwid, hwid, get_device(hwid)))
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if nn6 is not None: print(" - Unknown: {:04x} / {:d}".format(nn6, nn6))
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if nn7 is not None: print(" - Unknown: {:04x} / {:d}".format(nn7, nn7))
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if fwver is not None: print(" - Firmware version: {:d}".format(fwver))
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global last_type6_format, last_type6_fields, last_type6_fids
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values = unpack("<" + last_type6_format, payload)
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for i, v in enumerate(values):
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fid = last_type6_fids[i]
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fdesc = last_type6_fields[i]
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if fid == 0x1009:
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print(" - {:>20}: 0x{:04x} / {:d} ({})".format(fdesc, v, v, get_device(v)))
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elif fid == 0x2015:
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print(" - {:>20}: {} Bytes".format(fdesc, v))
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else:
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print(" - {:>20}: 0x{:04x} / {:d}".format(fdesc, v, v))
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with open(FILE, "rb") as f:
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sig = f.read(8)
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