include/linux/netfilter_ipv4/ipt_sctp.h

   1 #ifndef _IPT_SCTP_H_
   2 #define _IPT_SCTP_H_
   3
   4 #define IPT_SCTP_SRC_PORTS              0x01
   5 #define IPT_SCTP_DEST_PORTS             0x02
   6 #define IPT_SCTP_CHUNK_TYPES            0x04
   7
   8 #define IPT_SCTP_VALID_FLAGS            0x07
   9
  10 #define ELEMCOUNT(x) (sizeof(x)/sizeof(x[0]))
  11
  12
  13 struct ipt_sctp_flag_info {
  14         u_int8_t chunktype;
  15         u_int8_t flag;
  16         u_int8_t flag_mask;
  17 };
  18
  19 #define IPT_NUM_SCTP_FLAGS      4
  20
  21 struct ipt_sctp_info {
  22         u_int16_t dpts[2];  /* Min, Max */
  23         u_int16_t spts[2];  /* Min, Max */
  24
  25         u_int32_t chunkmap[256 / sizeof (u_int32_t)];  /* 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         u_int32_t chunk_match_type;
  32         struct ipt_sctp_flag_info flag_info[IPT_NUM_SCTP_FLAGS];
  33         int flag_count;
  34
  35         u_int32_t flags;
  36         u_int32_t invflags;
  37 };
  38
  39 #define bytes(type) (sizeof(type) * 8)
  40
  41 #define SCTP_CHUNKMAP_SET(chunkmap, type)               \
  42         do {                                            \
  43                 chunkmap[type / bytes(u_int32_t)] |=    \
  44                         1 << (type % bytes(u_int32_t)); \
  45         } while (0)
  46
  47 #define SCTP_CHUNKMAP_CLEAR(chunkmap, type)                     \
  48         do {                                                    \
  49                 chunkmap[type / bytes(u_int32_t)] &=            \
  50                         ~(1 << (type % bytes(u_int32_t)));      \
  51         } while (0)
  52
  53 #define SCTP_CHUNKMAP_IS_SET(chunkmap, type)                    \
  54 ({                                                              \
  55         (chunkmap[type / bytes (u_int32_t)] &                   \
  56                 (1 << (type % bytes (u_int32_t)))) ? 1: 0;      \
  57 })
  58
  59 #define SCTP_CHUNKMAP_RESET(chunkmap)                           \
  60         do {                                                    \
  61                 int i;                                          \
  62                 for (i = 0; i < ELEMCOUNT(chunkmap); i++)       \
  63                         chunkmap[i] = 0;                        \
  64         } while (0)
  65
  66 #define SCTP_CHUNKMAP_SET_ALL(chunkmap)                         \
  67         do {                                                    \
  68                 int i;                                          \
  69                 for (i = 0; i < ELEMCOUNT(chunkmap); i++)       \
  70                         chunkmap[i] = ~0;                       \
  71         } while (0)
  72
  73 #define SCTP_CHUNKMAP_COPY(destmap, srcmap)                     \
  74         do {                                                    \
  75                 int i;                                          \
  76                 for (i = 0; i < ELEMCOUNT(chunkmap); i++)       \
  77                         destmap[i] = srcmap[i];                 \
  78         } while (0)
  79
  80 #define SCTP_CHUNKMAP_IS_CLEAR(chunkmap)                \
  81 ({                                                      \
  82         int i;                                          \
  83         int flag = 1;                                   \
  84         for (i = 0; i < ELEMCOUNT(chunkmap); i++) {     \
  85                 if (chunkmap[i]) {                      \
  86                         flag = 0;                       \
  87                         break;                          \
  88                 }                                       \
  89         }                                               \
  90         flag;                                           \
  91 })
  92
  93 #define SCTP_CHUNKMAP_IS_ALL_SET(chunkmap)              \
  94 ({                                                      \
  95         int i;                                          \
  96         int flag = 1;                                   \
  97         for (i = 0; i < ELEMCOUNT(chunkmap); i++) {     \
  98                 if (chunkmap[i] != ~0) {                \
  99                         flag = 0;                       \
 100                                 break;                  \
 101                 }                                       \
 102         }                                               \
 103         flag;                                           \
 104 })
 105
 106 #endif /* _IPT_SCTP_H_ */
 107