#ifndef _NF_CONNTRACK_TUPLE_H
#define _NF_CONNTRACK_TUPLE_H
+#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
/* A `tuple' is a structure containing the information to uniquely
"non-manipulatable" lines, for the benefit of the NAT code.
*/
-#define NF_CT_TUPLE_L3SIZE 4
-
-/* The l3 protocol-specific manipulable parts of the tuple: always in
- network order! */
-union nf_conntrack_address {
- u_int32_t all[NF_CT_TUPLE_L3SIZE];
- __be32 ip;
- __be32 ip6[4];
-};
+#define NF_CT_TUPLE_L3SIZE ARRAY_SIZE(((union nf_inet_addr *)NULL)->all)
/* The protocol-specific manipulable parts of the tuple: always in
network order! */
union nf_conntrack_man_proto
{
/* Add other protocols here. */
- u_int16_t all;
+ __be16 all;
struct {
__be16 port;
} icmp;
struct {
__be16 port;
+ } dccp;
+ struct {
+ __be16 port;
} sctp;
+ struct {
+ __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */
+ } gre;
};
/* The manipulable part of the tuple. */
struct nf_conntrack_man
{
- union nf_conntrack_address u3;
+ union nf_inet_addr u3;
union nf_conntrack_man_proto u;
/* Layer 3 protocol */
u_int16_t l3num;
/* These are the parts of the tuple which are fixed. */
struct {
- union nf_conntrack_address u3;
+ union nf_inet_addr u3;
union {
/* Add other protocols here. */
- u_int16_t all;
+ __be16 all;
struct {
__be16 port;
} icmp;
struct {
__be16 port;
+ } dccp;
+ struct {
+ __be16 port;
} sctp;
+ struct {
+ __be16 key;
+ } gre;
} u;
/* The protocol. */
} dst;
};
-/* This is optimized opposed to a memset of the whole structure. Everything we
- * really care about is the source/destination unions */
-#define NF_CT_TUPLE_U_BLANK(tuple) \
- do { \
- (tuple)->src.u.all = 0; \
- (tuple)->dst.u.all = 0; \
- memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \
- memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \
- } while (0)
+struct nf_conntrack_tuple_mask
+{
+ struct {
+ union nf_inet_addr u3;
+ union nf_conntrack_man_proto u;
+ } src;
+};
#ifdef __KERNEL__
-#define NF_CT_DUMP_TUPLE(tp) \
-DEBUGP("tuple %p: %u %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n", \
- (tp), (tp)->src.l3num, (tp)->dst.protonum, \
- NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \
- NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all))
+static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
+{
+#ifdef DEBUG
+ printk("tuple %p: %u %pI4:%hu -> %pI4:%hu\n",
+ t, t->dst.protonum,
+ &t->src.u3.ip, ntohs(t->src.u.all),
+ &t->dst.u3.ip, ntohs(t->dst.u.all));
+#endif
+}
+
+static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple *t)
+{
+#ifdef DEBUG
+ printk("tuple %p: %u %pI6 %hu -> %pI6 %hu\n",
+ t, t->dst.protonum,
+ t->src.u3.all, ntohs(t->src.u.all),
+ t->dst.u3.all, ntohs(t->dst.u.all));
+#endif
+}
+
+static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
+{
+ switch (t->src.l3num) {
+ case AF_INET:
+ nf_ct_dump_tuple_ip(t);
+ break;
+ case AF_INET6:
+ nf_ct_dump_tuple_ipv6(t);
+ break;
+ }
+}
/* If we're the first tuple, it's the original dir. */
#define NF_CT_DIRECTION(h) \
/* Connections have two entries in the hash table: one for each way */
struct nf_conntrack_tuple_hash
{
- struct list_head list;
-
+ struct hlist_node hnode;
struct nf_conntrack_tuple tuple;
};
#endif /* __KERNEL__ */
-static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
- const struct nf_conntrack_tuple *t2)
+static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
{
- return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
- t1->src.u3.all[1] == t2->src.u3.all[1] &&
- t1->src.u3.all[2] == t2->src.u3.all[2] &&
- t1->src.u3.all[3] == t2->src.u3.all[3] &&
+ return (nf_inet_addr_cmp(&t1->src.u3, &t2->src.u3) &&
t1->src.u.all == t2->src.u.all &&
- t1->src.l3num == t2->src.l3num &&
- t1->dst.protonum == t2->dst.protonum);
+ t1->src.l3num == t2->src.l3num);
}
-static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
- const struct nf_conntrack_tuple *t2)
+static inline bool __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
{
- return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
- t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
- t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
- t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
+ return (nf_inet_addr_cmp(&t1->dst.u3, &t2->dst.u3) &&
t1->dst.u.all == t2->dst.u.all &&
- t1->src.l3num == t2->src.l3num &&
t1->dst.protonum == t2->dst.protonum);
}
-static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
- const struct nf_conntrack_tuple *t2)
+static inline bool nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
+{
+ return __nf_ct_tuple_src_equal(t1, t2) &&
+ __nf_ct_tuple_dst_equal(t1, t2);
+}
+
+static inline bool
+nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
+ const struct nf_conntrack_tuple_mask *m2)
+{
+ return (nf_inet_addr_cmp(&m1->src.u3, &m2->src.u3) &&
+ m1->src.u.all == m2->src.u.all);
+}
+
+static inline bool
+nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2,
+ const struct nf_conntrack_tuple_mask *mask)
{
- return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2);
+ int count;
+
+ for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
+ if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
+ mask->src.u3.all[count])
+ return false;
+ }
+
+ if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
+ return false;
+
+ if (t1->src.l3num != t2->src.l3num ||
+ t1->dst.protonum != t2->dst.protonum)
+ return false;
+
+ return true;
}
-static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
- const struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *mask)
+static inline bool
+nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
+ const struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_tuple_mask *mask)
{
- int count = 0;
-
- for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
- if ((t->src.u3.all[count] ^ tuple->src.u3.all[count]) &
- mask->src.u3.all[count])
- return 0;
- }
-
- for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
- if ((t->dst.u3.all[count] ^ tuple->dst.u3.all[count]) &
- mask->dst.u3.all[count])
- return 0;
- }
-
- if ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all ||
- (t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all ||
- (t->src.l3num ^ tuple->src.l3num) & mask->src.l3num ||
- (t->dst.protonum ^ tuple->dst.protonum) & mask->dst.protonum)
- return 0;
-
- return 1;
+ return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
+ __nf_ct_tuple_dst_equal(t, tuple);
}
#endif /* _NF_CONNTRACK_TUPLE_H */
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