wirenboard / wb-mqtt-mbgate / 1

70%

master: 70%

push

github

fix(modbus): reject unsupported function codes

Unknown function codes fell through to write handling, inserted a null map entry, and crashed when its range was dereferenced. Return Modbus exception 0x01 before accessing command maps.

Refs SOFT-6923

Co-Authored-By: OpenAI GPT-5 <noreply@openai.com>

719 of 937 branches covered (76.73%)

12 of 12 new or added lines in 2 files covered. (100.0%)

1209 of 1728 relevant lines covered (69.97%)

11.58 hits per line