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