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