root/include/linux/netfilter_ipv4/ipt_sctp.h

#ifndef _IPT_SCTP_H_
#define _IPT_SCTP_H_

#define IPT_SCTP_SRC_PORTS              0x01
#define IPT_SCTP_DEST_PORTS             0x02
#define IPT_SCTP_CHUNK_TYPES            0x04

#define IPT_SCTP_VALID_FLAGS            0x07


struct ipt_sctp_flag_info {
        u_int8_t chunktype;
        u_int8_t flag;
        u_int8_t flag_mask;
};

#define IPT_NUM_SCTP_FLAGS      4

struct ipt_sctp_info {
        u_int16_t dpts[2];  /* Min, Max */
        u_int16_t spts[2];  /* Min, Max */

        u_int32_t chunkmap[256 / sizeof (u_int32_t)];  /* Bit mask of chunks to be matched according to RFC 2960 */

#define SCTP_CHUNK_MATCH_ANY   0x01  /* Match if any of the chunk types are present */
#define SCTP_CHUNK_MATCH_ALL   0x02  /* Match if all of the chunk types are present */
#define SCTP_CHUNK_MATCH_ONLY  0x04  /* Match if these are the only chunk types present */

        u_int32_t chunk_match_type;
        struct ipt_sctp_flag_info flag_info[IPT_NUM_SCTP_FLAGS];
        int flag_count;

        u_int32_t flags;
        u_int32_t invflags;
};

#define bytes(type) (sizeof(type) * 8)

#define SCTP_CHUNKMAP_SET(chunkmap, type)               \
        do {                                            \
                chunkmap[type / bytes(u_int32_t)] |=    \
                        1 << (type % bytes(u_int32_t)); \
        } while (0)

#define SCTP_CHUNKMAP_CLEAR(chunkmap, type)                     \
        do {                                                    \
                chunkmap[type / bytes(u_int32_t)] &=            \
                        ~(1 << (type % bytes(u_int32_t)));      \
        } while (0)

#define SCTP_CHUNKMAP_IS_SET(chunkmap, type)                    \
({                                                              \
        (chunkmap[type / bytes (u_int32_t)] &                   \
                (1 << (type % bytes (u_int32_t)))) ? 1: 0;      \
})

#define SCTP_CHUNKMAP_RESET(chunkmap)                           \
        do {                                                    \
                int i;                                          \
                for (i = 0; i < ARRAY_SIZE(chunkmap); i++)      \
                        chunkmap[i] = 0;                        \
        } while (0)

#define SCTP_CHUNKMAP_SET_ALL(chunkmap)                         \
        do {                                                    \
                int i;                                          \
                for (i = 0; i < ARRAY_SIZE(chunkmap); i++)      \
                        chunkmap[i] = ~0;                       \
        } while (0)

#define SCTP_CHUNKMAP_COPY(destmap, srcmap)                     \
        do {                                                    \
                int i;                                          \
                for (i = 0; i < ARRAY_SIZE(chunkmap); i++)      \
                        destmap[i] = srcmap[i];                 \
        } while (0)

#define SCTP_CHUNKMAP_IS_CLEAR(chunkmap)                \
({                                                      \
        int i;                                          \
        int flag = 1;                                   \
        for (i = 0; i < ARRAY_SIZE(chunkmap); i++) {    \
                if (chunkmap[i]) {                      \
                        flag = 0;                       \
                        break;                          \
                }                                       \
        }                                               \
        flag;                                           \
})

#define SCTP_CHUNKMAP_IS_ALL_SET(chunkmap)              \
({                                                      \
        int i;                                          \
        int flag = 1;                                   \
        for (i = 0; i < ARRAY_SIZE(chunkmap); i++) {    \
                if (chunkmap[i] != ~0) {                \
                        flag = 0;                       \
                                break;                  \
                }                                       \
        }                                               \
        flag;                                           \
})

#endif /* _IPT_SCTP_H_ */