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agessaman
02ad556582
Builds on #303. Channel text is capped at 155 bytes of "<name>: <text>" instead of 124. The firmware encrypts a 4-byte timestamp and a 1-byte text type ahead of the text in 16-byte AES blocks, so 155 fills the 160-byte block exactly (163-byte payload), and the last 5 bytes up to the firmware's 160 would spill into another block (179-byte payload). 124 was set on the premise that repeaters drop 165-byte frames. They don't: allowPacketForward has no size check and MAX_PACKET_PAYLOAD is 184, and 163-byte GRP_TXT payloads are routinely seen at 3+ hops. The frame-budget tests now pin the limit within the firmware's 160 and to a whole cipher block instead of to a 131-byte relay ceiling. Also corrects the payload model's plaintext header from 4 bytes to 5, and moves a test import back above the helper that had split the import block.