73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
#ifndef _IPXE_FRAGMENT_H
|
|
#define _IPXE_FRAGMENT_H
|
|
|
|
/** @file
|
|
*
|
|
* Fragment reassembly
|
|
*
|
|
*/
|
|
|
|
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|
|
|
#include <stdint.h>
|
|
#include <ipxe/list.h>
|
|
#include <ipxe/iobuf.h>
|
|
#include <ipxe/retry.h>
|
|
|
|
/** Fragment reassembly timeout */
|
|
#define FRAGMENT_TIMEOUT ( TICKS_PER_SEC / 2 )
|
|
|
|
/** A fragment reassembly buffer */
|
|
struct fragment {
|
|
/* List of fragment reassembly buffers */
|
|
struct list_head list;
|
|
/** Reassembled packet */
|
|
struct io_buffer *iobuf;
|
|
/** Length of non-fragmentable portion of reassembled packet */
|
|
size_t hdrlen;
|
|
/** Reassembly timer */
|
|
struct retry_timer timer;
|
|
/** Fragment reassembler */
|
|
struct fragment_reassembler *fragments;
|
|
};
|
|
|
|
/** A fragment reassembler */
|
|
struct fragment_reassembler {
|
|
/** List of fragment reassembly buffers */
|
|
struct list_head list;
|
|
/**
|
|
* Check if fragment matches fragment reassembly buffer
|
|
*
|
|
* @v fragment Fragment reassembly buffer
|
|
* @v iobuf I/O buffer
|
|
* @v hdrlen Length of non-fragmentable potion of I/O buffer
|
|
* @ret is_fragment Fragment matches this reassembly buffer
|
|
*/
|
|
int ( * is_fragment ) ( struct fragment *fragment,
|
|
struct io_buffer *iobuf, size_t hdrlen );
|
|
/**
|
|
* Get fragment offset
|
|
*
|
|
* @v iobuf I/O buffer
|
|
* @v hdrlen Length of non-fragmentable potion of I/O buffer
|
|
* @ret offset Offset
|
|
*/
|
|
size_t ( * fragment_offset ) ( struct io_buffer *iobuf, size_t hdrlen );
|
|
/**
|
|
* Check if more fragments exist
|
|
*
|
|
* @v iobuf I/O buffer
|
|
* @v hdrlen Length of non-fragmentable potion of I/O buffer
|
|
* @ret more_frags More fragments exist
|
|
*/
|
|
int ( * more_fragments ) ( struct io_buffer *iobuf, size_t hdrlen );
|
|
/** Associated IP statistics */
|
|
struct ip_statistics *stats;
|
|
};
|
|
|
|
extern struct io_buffer *
|
|
fragment_reassemble ( struct fragment_reassembler *fragments,
|
|
struct io_buffer *iobuf, size_t *hdrlen );
|
|
|
|
#endif /* _IPXE_FRAGMENT_H */
|