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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _XT_SCTP_H_
3#define _XT_SCTP_H_
4
5#include <linux/types.h>
6
7#define XT_SCTP_SRC_PORTS 0x01
8#define XT_SCTP_DEST_PORTS 0x02
9#define XT_SCTP_CHUNK_TYPES 0x04
10
11#define XT_SCTP_VALID_FLAGS 0x07
12
13struct xt_sctp_flag_info {
14 __u8 chunktype;
15 __u8 flag;
16 __u8 flag_mask;
17};
18
19#define XT_NUM_SCTP_FLAGS 4
20
21struct xt_sctp_info {
22 __u16 dpts[2]; /* Min, Max */
23 __u16 spts[2]; /* Min, Max */
24
25 __u32 chunkmap[256 / sizeof (__u32)]; /* Bit mask of chunks to be matched according to RFC 2960 */
26
27#define SCTP_CHUNK_MATCH_ANY 0x01 /* Match if any of the chunk types are present */
28#define SCTP_CHUNK_MATCH_ALL 0x02 /* Match if all of the chunk types are present */
29#define SCTP_CHUNK_MATCH_ONLY 0x04 /* Match if these are the only chunk types present */
30
31 __u32 chunk_match_type;
32 struct xt_sctp_flag_info flag_info[XT_NUM_SCTP_FLAGS];
33 int flag_count;
34
35 __u32 flags;
36 __u32 invflags;
37};
38
39#define bytes(type) (sizeof(type) * 8)
40
41#define SCTP_CHUNKMAP_SET(chunkmap, type) \
42 do { \
43 (chunkmap)[type / bytes(__u32)] |= \
44 1u << (type % bytes(__u32)); \
45 } while (0)
46
47#define SCTP_CHUNKMAP_CLEAR(chunkmap, type) \
48 do { \
49 (chunkmap)[type / bytes(__u32)] &= \
50 ~(1u << (type % bytes(__u32))); \
51 } while (0)
52
53#define SCTP_CHUNKMAP_IS_SET(chunkmap, type) \
54({ \
55 ((chunkmap)[type / bytes (__u32)] & \
56 (1u << (type % bytes (__u32)))) ? 1: 0; \
57})
58
59#define SCTP_CHUNKMAP_RESET(chunkmap) \
60 memset((chunkmap), 0, sizeof(chunkmap))
61
62#define SCTP_CHUNKMAP_SET_ALL(chunkmap) \
63 memset((chunkmap), ~0U, sizeof(chunkmap))
64
65#define SCTP_CHUNKMAP_COPY(destmap, srcmap) \
66 memcpy((destmap), (srcmap), sizeof(srcmap))
67
68#define SCTP_CHUNKMAP_IS_CLEAR(chunkmap) \
69 __sctp_chunkmap_is_clear((chunkmap), ARRAY_SIZE(chunkmap))
70static inline _Bool
71__sctp_chunkmap_is_clear(const __u32 *chunkmap, unsigned int n)
72{
73 unsigned int i;
74 for (i = 0; i < n; ++i)
75 if (chunkmap[i])
76 return 0;
77 return 1;
78}
79
80#define SCTP_CHUNKMAP_IS_ALL_SET(chunkmap) \
81 __sctp_chunkmap_is_all_set((chunkmap), ARRAY_SIZE(chunkmap))
82static inline _Bool
83__sctp_chunkmap_is_all_set(const __u32 *chunkmap, unsigned int n)
84{
85 unsigned int i;
86 for (i = 0; i < n; ++i)
87 if (chunkmap[i] != ~0U)
88 return 0;
89 return 1;
90}
91
92#endif /* _XT_SCTP_H_ */
93
94

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source code of linux/include/uapi/linux/netfilter/xt_sctp.h