blob: 0069e5e08f0525dc005936ca146fcaf5791ac10b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#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 */
|
