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| author | Michael Brown <mcb30@ipxe.org> | 2021-05-06 13:17:35 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2021-05-08 15:34:19 +0100 |
| commit | d093683d93ccfac4c76e72264ec3b0d8f0017b92 (patch) | |
| tree | 7e752e4ffae9a5ef8ff0341e33d69da2acc693a1 /src/include | |
| parent | 5c9c8d2b9b78cf4e1f256fe6874855c1aee458f2 (diff) | |
| download | ipxe-d093683d93ccfac4c76e72264ec3b0d8f0017b92.tar.gz | |
[zlib] Add support for zlib archive images
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 | ||||
| -rw-r--r-- | src/include/ipxe/zlib.h | 43 |
2 files changed, 44 insertions, 0 deletions
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 162e6b7b0..35b03fe9d 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -302,6 +302,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define ERRFILE_der ( ERRFILE_IMAGE | 0x00080000 ) #define ERRFILE_pem ( ERRFILE_IMAGE | 0x00090000 ) #define ERRFILE_archive ( ERRFILE_IMAGE | 0x000a0000 ) +#define ERRFILE_zlib ( ERRFILE_IMAGE | 0x000b0000 ) #define ERRFILE_asn1 ( ERRFILE_OTHER | 0x00000000 ) #define ERRFILE_chap ( ERRFILE_OTHER | 0x00010000 ) diff --git a/src/include/ipxe/zlib.h b/src/include/ipxe/zlib.h new file mode 100644 index 000000000..29016c38e --- /dev/null +++ b/src/include/ipxe/zlib.h @@ -0,0 +1,43 @@ +#ifndef _IPXE_ZLIB_H +#define _IPXE_ZLIB_H + +/** @file + * + * zlib compressed images + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <stdint.h> +#include <byteswap.h> +#include <ipxe/image.h> +#include <ipxe/deflate.h> + +/** zlib magic header */ +union zlib_magic { + /** Compression method and flags */ + uint8_t cmf; + /** Check value */ + uint16_t check; +} __attribute__ (( packed )); + +/** + * Check that zlib magic header is valid + * + * @v magic Magic header + * @ret is_valid Magic header is valid + */ +static inline int zlib_magic_is_valid ( union zlib_magic *magic ) { + + /* Check magic value as per RFC 6713 */ + return ( ( ( magic->cmf & 0x8f ) == 0x08 ) && + ( ( be16_to_cpu ( magic->check ) % 31 ) == 0 ) ); +} + +extern int zlib_deflate ( enum deflate_format format, struct deflate_chunk *in, + struct image *extracted ); + +extern struct image_type zlib_image_type __image_type ( PROBE_NORMAL ); + +#endif /* _IPXE_ZLIB_H */ |