Fix Bambu LAN printing with legacy network plugin #498

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MrUnknownDE · 2026-04-05T16:21:46+02:00

MrUnknownDE commented

2026-04-05 16:21:46 +02:00

Originally created by @SoftFever on 3/3/2026

Description

BBLPrinterAgent was always calling modern DLL signatures, causing ABI
mismatches when the legacy network plugin is loaded:

send_message/send_message_to_printer called with 5 args (flag param)
but legacy DLL expects 4 args, causing stack corruption
Print functions passed PrintParams (with nozzle_mapping, ams_mapping2,
nozzles_info fields) but legacy DLL expects PrintParams_Legacy, shifting
the password field offset and producing "access code is invalid" errors

Add legacy branching to all 7 affected methods in BBLPrinterAgent,
matching the pattern from the original NetworkAgent implementation.
Sync the legacy flag from NetworkAgent::use_legacy_network during
plugin initialization and improve LAN connection failure diagnostics.

Fixes #12514, #12537, #12472, #12563

Screenshots/Recordings/Graphs

Tests

*Originally created by @SoftFever on 3/3/2026* # Description BBLPrinterAgent was always calling modern DLL signatures, causing ABI mismatches when the legacy network plugin is loaded: - send_message/send_message_to_printer called with 5 args (flag param) but legacy DLL expects 4 args, causing stack corruption - Print functions passed PrintParams (with nozzle_mapping, ams_mapping2, nozzles_info fields) but legacy DLL expects PrintParams_Legacy, shifting the password field offset and producing "access code is invalid" errors Add legacy branching to all 7 affected methods in BBLPrinterAgent, matching the pattern from the original NetworkAgent implementation. Sync the legacy flag from NetworkAgent::use_legacy_network during plugin initialization and improve LAN connection failure diagnostics. Fixes #12514, #12537, #12472, #12563 # Screenshots/Recordings/Graphs  ## Tests

MrUnknownDE closed this issue

2026-04-05 16:21:46 +02:00

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Reference: github/OrcaSlicer#498