diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_conntrack_expect.h | 3 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack_helper.h | 5 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack_tuple.h | 65 |
3 files changed, 47 insertions, 26 deletions
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h index c0b1d1fb23e..13643f7f742 100644 --- a/include/net/netfilter/nf_conntrack_expect.h +++ b/include/net/netfilter/nf_conntrack_expect.h @@ -16,7 +16,8 @@ struct nf_conntrack_expect struct list_head list; /* We expect this tuple, with the following mask */ - struct nf_conntrack_tuple tuple, mask; + struct nf_conntrack_tuple tuple; + struct nf_conntrack_tuple_mask mask; /* Function to call after setup and insertion */ void (*expectfn)(struct nf_conn *new, diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index b43a75ba44a..d62e6f093af 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -24,10 +24,9 @@ struct nf_conntrack_helper * expected connections */ unsigned int timeout; /* timeout for expecteds */ - /* Mask of things we will help (compared against server response) */ + /* Tuple of things we will help (compared against server response) */ struct nf_conntrack_tuple tuple; - struct nf_conntrack_tuple mask; - + /* Function to call when data passes; return verdict, or -1 to invalidate. */ int (*help)(struct sk_buff **pskb, diff --git a/include/net/netfilter/nf_conntrack_tuple.h b/include/net/netfilter/nf_conntrack_tuple.h index d02ce876b4c..99934ab538e 100644 --- a/include/net/netfilter/nf_conntrack_tuple.h +++ b/include/net/netfilter/nf_conntrack_tuple.h @@ -100,6 +100,14 @@ struct nf_conntrack_tuple } dst; }; +struct nf_conntrack_tuple_mask +{ + struct { + union nf_conntrack_address u3; + union nf_conntrack_man_proto u; + } src; +}; + /* 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) \ @@ -161,31 +169,44 @@ static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1, return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2); } +static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1, + const struct nf_conntrack_tuple_mask *m2) +{ + return (m1->src.u3.all[0] == m2->src.u3.all[0] && + m1->src.u3.all[1] == m2->src.u3.all[1] && + m1->src.u3.all[2] == m2->src.u3.all[2] && + m1->src.u3.all[3] == m2->src.u3.all[3] && + m1->src.u.all == m2->src.u.all); +} + +static inline int 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) +{ + 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 0; + } + + if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all) + return 0; + + if (t1->src.l3num != t2->src.l3num || + t1->dst.protonum != t2->dst.protonum) + return 0; + + return 1; +} + 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) + 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 */ |