LXR linux/include/linux/netfilter/xt

   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
  12struct xt_sctp_flag_info {
  13        __u8 chunktype;
  14        __u8 flag;
  15        __u8 flag_mask;
  16};
  17
  18#define XT_NUM_SCTP_FLAGS       4
  19
  20struct 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))
  69static 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))
  81static 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
  93