It's important for modifying / extracting firmware content. cferom is
optional image content at the file beginning.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
1. Don't allow pipe stdin as we need to fseek()
2. Don't alow TTY as it doesn't make sense for binary input
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Netgear uses CHK header which needs to be skipped when validating
BCM4908 image. Detect it directly in the bcm4908img tool. Dealing with
binary structs and endianess is way simpler in C.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Move code parsing existing firmware file to separated function. This
cleans up existing code and allows reusing parsing code for other
commands.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Flashing image with BCM4908 CFE bootloader requires specific firmware
format. It needs 20 extra bytes with magic numbers and CRC32 appended.
This tools allows appending such a tail to the specified image and also
verifying CRC32 of existing BCM4908 image.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
