GetCmdVersion: Don't fall back to v0 if >0xFF#250
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JohnAZoidberg merged 1 commit intomainfrom Jan 17, 2026
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v0 only supports 8 bit command IDs. I ran into an issue where truncation and then misreporting happened. I asked claude to fix it and it wanted to just try the command to see if it fails. After I said that's not a good idea, we need to figure out what's wrong, it found this issue. Signed-off-by: Daniel Schaefer <dhs@frame.work>
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Rewrote it again to make the code obviously safe without truncating typecasts. |
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Pull request overview
This PR fixes a bug in the cmd_version_supported function where command IDs greater than 255 (0xFF) were being incorrectly truncated when falling back to the v0 API, which only supports 8-bit command IDs. The fix ensures that commands with IDs > 255 return false instead of being silently truncated and potentially misreported.
Changes:
- Updated the function signature to accept
u32instead ofu16for the command parameter - Added proper validation to only fall back to v0 API when the command ID fits in 8 bits
- Commands with IDs > 255 now correctly return
falseinstead of being truncated
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v0 only supports 8 bit command IDs.
I ran into an issue where truncation and then misreporting happened. I asked claude to fix it and it wanted to just try the command to see if it fails. After I said that's not a good idea, we need to figure out what's wrong, it found this issue.