include/linux/netfilter/xt_sctp.h

   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
  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
  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