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_ */ 107 108