Homeassisant TLV fix

fix_tlv.py

#!/usr/bin/env python3

import binascii
import json
import sys

# This is a temporary fix for this github issue: https://github.com/home-assistant/core/issues/127601
# Instructions:
# 1. MAKE A BACKUP OF YOUR HOMEASSISTANT. This changes system files.
# 2. Share your credentials using the ios app. You should make the apple thread credentials your preferred network.
# 3. Log in via ssh, and go into /config/.storage/
# 4. Open the thread.datasets file, find your dataset and the "tlv" value. Copy the tlv value somewhere safe.
# 5. Run this script like so: `./fix_tlv.py [tlv]`.
# 6. Delete The thread.datasets file and reboot homeassistant.
# 7. Go into the thread integration and hit "Add Dataset from TLV"
# 8. Paste in the new TLV value.


def get_tlv_data(tlv_str):
    DATA = {}

    tlv_data = binascii.a2b_hex(tlv_str)
    pos = 0
    while pos < len(tlv_data):
        tag = tlv_data[pos]
        pos += 1
        _len = tlv_data[pos]
        pos += 1
        val = tlv_data[pos:pos+_len]
        pos += _len
        #DATA[tag] = MeshcopTLVItem(tag, data=bytes.fromhex("%s" % val.hex()))
        DATA[tag] = "%s" % val.hex()

    return DATA

def fix_tlv_data(data):
  data.pop(74) # this is the bad key. OT_MESHCOP_TLV_WAKEUP_CHANNEL

def create_tlv_str(data):
  import python_otbr_api
  from python_otbr_api import PENDING_DATASET_DELAY_TIMER, tlv_parser
  from python_otbr_api.pskc import compute_pskc
  from python_otbr_api.tlv_parser import MeshcopTLVType, MeshcopTLVItem
  tlv_dict = {
    key: MeshcopTLVItem(key,data=bytes.fromhex(value)) for key,value in data.items()
  }
  tlv  = tlv_parser.encode_tlv(tlv_dict)

  return tlv


if __name__ == '__main__':
  bad_tlv = sys.argv[1]
  data = get_tlv_data(bad_tlv)
  fix_tlv_data(data)
  fixed_str = create_tlv_str(data)
  print(fixed_str)