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 
13 struct xt_sctp_flag_info {
14 	__u8 chunktype;
15 	__u8 flag;
16 	__u8 flag_mask;
17 };
18 
19 #define XT_NUM_SCTP_FLAGS	4
20 
21 struct 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))
70 static inline _Bool
__sctp_chunkmap_is_clear(const __u32 * chunkmap,unsigned int n)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))
82 static inline _Bool
__sctp_chunkmap_is_all_set(const __u32 * chunkmap,unsigned int n)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