Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Definitions and Declarations for tuple. |
| 3 | * |
| 4 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 5 | * - generalize L3 protocol dependent part. |
| 6 | * |
| 7 | * Derived from include/linux/netfiter_ipv4/ip_conntrack_tuple.h |
| 8 | */ |
| 9 | |
| 10 | #ifndef _NF_CONNTRACK_TUPLE_H |
| 11 | #define _NF_CONNTRACK_TUPLE_H |
| 12 | |
Jan Engelhardt | 643a2c1 | 2007-12-17 22:43:50 -0800 | [diff] [blame^] | 13 | #include <linux/netfilter/x_tables.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 14 | #include <linux/netfilter/nf_conntrack_tuple_common.h> |
| 15 | |
| 16 | /* A `tuple' is a structure containing the information to uniquely |
| 17 | identify a connection. ie. if two packets have the same tuple, they |
| 18 | are in the same connection; if not, they are not. |
| 19 | |
| 20 | We divide the structure along "manipulatable" and |
| 21 | "non-manipulatable" lines, for the benefit of the NAT code. |
| 22 | */ |
| 23 | |
Jan Engelhardt | 643a2c1 | 2007-12-17 22:43:50 -0800 | [diff] [blame^] | 24 | #define NF_CT_TUPLE_L3SIZE ARRAY_SIZE(((union nf_inet_addr *)NULL)->all) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 25 | |
| 26 | /* The protocol-specific manipulable parts of the tuple: always in |
| 27 | network order! */ |
| 28 | union nf_conntrack_man_proto |
| 29 | { |
| 30 | /* Add other protocols here. */ |
Al Viro | a34c458 | 2007-07-26 17:33:19 +0100 | [diff] [blame] | 31 | __be16 all; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 32 | |
| 33 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 34 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 35 | } tcp; |
| 36 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 37 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 38 | } udp; |
| 39 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 40 | __be16 id; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 41 | } icmp; |
| 42 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 43 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 44 | } sctp; |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 45 | struct { |
| 46 | __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */ |
| 47 | } gre; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | /* The manipulable part of the tuple. */ |
| 51 | struct nf_conntrack_man |
| 52 | { |
Jan Engelhardt | 643a2c1 | 2007-12-17 22:43:50 -0800 | [diff] [blame^] | 53 | union nf_inet_addr u3; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 54 | union nf_conntrack_man_proto u; |
| 55 | /* Layer 3 protocol */ |
| 56 | u_int16_t l3num; |
| 57 | }; |
| 58 | |
| 59 | /* This contains the information to distinguish a connection. */ |
| 60 | struct nf_conntrack_tuple |
| 61 | { |
| 62 | struct nf_conntrack_man src; |
| 63 | |
| 64 | /* These are the parts of the tuple which are fixed. */ |
| 65 | struct { |
Jan Engelhardt | 643a2c1 | 2007-12-17 22:43:50 -0800 | [diff] [blame^] | 66 | union nf_inet_addr u3; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 67 | union { |
| 68 | /* Add other protocols here. */ |
Al Viro | a34c458 | 2007-07-26 17:33:19 +0100 | [diff] [blame] | 69 | __be16 all; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 70 | |
| 71 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 72 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 73 | } tcp; |
| 74 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 75 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 76 | } udp; |
| 77 | struct { |
| 78 | u_int8_t type, code; |
| 79 | } icmp; |
| 80 | struct { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 81 | __be16 port; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 82 | } sctp; |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 83 | struct { |
| 84 | __be16 key; |
| 85 | } gre; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 86 | } u; |
| 87 | |
| 88 | /* The protocol. */ |
| 89 | u_int8_t protonum; |
| 90 | |
| 91 | /* The direction (for tuplehash) */ |
| 92 | u_int8_t dir; |
| 93 | } dst; |
| 94 | }; |
| 95 | |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 96 | struct nf_conntrack_tuple_mask |
| 97 | { |
| 98 | struct { |
Jan Engelhardt | 643a2c1 | 2007-12-17 22:43:50 -0800 | [diff] [blame^] | 99 | union nf_inet_addr u3; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 100 | union nf_conntrack_man_proto u; |
| 101 | } src; |
| 102 | }; |
| 103 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 104 | /* This is optimized opposed to a memset of the whole structure. Everything we |
| 105 | * really care about is the source/destination unions */ |
| 106 | #define NF_CT_TUPLE_U_BLANK(tuple) \ |
| 107 | do { \ |
| 108 | (tuple)->src.u.all = 0; \ |
| 109 | (tuple)->dst.u.all = 0; \ |
| 110 | memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \ |
| 111 | memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \ |
| 112 | } while (0) |
| 113 | |
| 114 | #ifdef __KERNEL__ |
| 115 | |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 116 | #define NF_CT_DUMP_TUPLE(tp) \ |
| 117 | pr_debug("tuple %p: %u %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n", \ |
| 118 | (tp), (tp)->src.l3num, (tp)->dst.protonum, \ |
| 119 | NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \ |
| 120 | NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all)) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 121 | |
| 122 | /* If we're the first tuple, it's the original dir. */ |
| 123 | #define NF_CT_DIRECTION(h) \ |
| 124 | ((enum ip_conntrack_dir)(h)->tuple.dst.dir) |
| 125 | |
| 126 | /* Connections have two entries in the hash table: one for each way */ |
| 127 | struct nf_conntrack_tuple_hash |
| 128 | { |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 129 | struct hlist_node hnode; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 130 | struct nf_conntrack_tuple tuple; |
| 131 | }; |
| 132 | |
| 133 | #endif /* __KERNEL__ */ |
| 134 | |
| 135 | static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1, |
| 136 | const struct nf_conntrack_tuple *t2) |
| 137 | { |
| 138 | return (t1->src.u3.all[0] == t2->src.u3.all[0] && |
| 139 | t1->src.u3.all[1] == t2->src.u3.all[1] && |
| 140 | t1->src.u3.all[2] == t2->src.u3.all[2] && |
| 141 | t1->src.u3.all[3] == t2->src.u3.all[3] && |
| 142 | t1->src.u.all == t2->src.u.all && |
| 143 | t1->src.l3num == t2->src.l3num && |
| 144 | t1->dst.protonum == t2->dst.protonum); |
| 145 | } |
| 146 | |
| 147 | static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1, |
| 148 | const struct nf_conntrack_tuple *t2) |
| 149 | { |
| 150 | return (t1->dst.u3.all[0] == t2->dst.u3.all[0] && |
| 151 | t1->dst.u3.all[1] == t2->dst.u3.all[1] && |
| 152 | t1->dst.u3.all[2] == t2->dst.u3.all[2] && |
| 153 | t1->dst.u3.all[3] == t2->dst.u3.all[3] && |
| 154 | t1->dst.u.all == t2->dst.u.all && |
| 155 | t1->src.l3num == t2->src.l3num && |
| 156 | t1->dst.protonum == t2->dst.protonum); |
| 157 | } |
| 158 | |
| 159 | static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1, |
| 160 | const struct nf_conntrack_tuple *t2) |
| 161 | { |
| 162 | return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2); |
| 163 | } |
| 164 | |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 165 | static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1, |
| 166 | const struct nf_conntrack_tuple_mask *m2) |
| 167 | { |
| 168 | return (m1->src.u3.all[0] == m2->src.u3.all[0] && |
| 169 | m1->src.u3.all[1] == m2->src.u3.all[1] && |
| 170 | m1->src.u3.all[2] == m2->src.u3.all[2] && |
| 171 | m1->src.u3.all[3] == m2->src.u3.all[3] && |
| 172 | m1->src.u.all == m2->src.u.all); |
| 173 | } |
| 174 | |
| 175 | static inline int nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1, |
| 176 | const struct nf_conntrack_tuple *t2, |
| 177 | const struct nf_conntrack_tuple_mask *mask) |
| 178 | { |
| 179 | int count; |
| 180 | |
| 181 | for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) { |
| 182 | if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) & |
| 183 | mask->src.u3.all[count]) |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all) |
| 188 | return 0; |
| 189 | |
| 190 | if (t1->src.l3num != t2->src.l3num || |
| 191 | t1->dst.protonum != t2->dst.protonum) |
| 192 | return 0; |
| 193 | |
| 194 | return 1; |
| 195 | } |
| 196 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 197 | static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t, |
| 198 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 199 | const struct nf_conntrack_tuple_mask *mask) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 200 | { |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 201 | return nf_ct_tuple_src_mask_cmp(t, tuple, mask) && |
| 202 | nf_ct_tuple_dst_equal(t, tuple); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | #endif /* _NF_CONNTRACK_TUPLE_H */ |