]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/net/netfilter/nf_queue.h
5 #include <linux/ipv6.h>
6 #include <linux/jhash.h>
8 /* Each queued (to userspace) skbuff has one of these. */
9 struct nf_queue_entry
{
10 struct list_head list
;
14 struct nf_hook_state state
;
15 struct nf_hook_entry
*hook
;
16 u16 size
; /* sizeof(entry) + saved route keys */
18 /* extra space to store route keys */
21 #define nf_queue_entry_reroute(x) ((void *)x + sizeof(struct nf_queue_entry))
24 struct nf_queue_handler
{
25 int (*outfn
)(struct nf_queue_entry
*entry
,
26 unsigned int queuenum
);
27 void (*nf_hook_drop
)(struct net
*net
,
28 const struct nf_hook_entry
*hooks
);
31 void nf_register_queue_handler(struct net
*net
, const struct nf_queue_handler
*qh
);
32 void nf_unregister_queue_handler(struct net
*net
);
33 void nf_reinject(struct nf_queue_entry
*entry
, unsigned int verdict
);
35 void nf_queue_entry_get_refs(struct nf_queue_entry
*entry
);
36 void nf_queue_entry_release_refs(struct nf_queue_entry
*entry
);
38 static inline void init_hashrandom(u32
*jhash_initval
)
40 while (*jhash_initval
== 0)
41 *jhash_initval
= prandom_u32();
44 static inline u32
hash_v4(const struct iphdr
*iph
, u32 initval
)
46 /* packets in either direction go into same queue */
47 if ((__force u32
)iph
->saddr
< (__force u32
)iph
->daddr
)
48 return jhash_3words((__force u32
)iph
->saddr
,
49 (__force u32
)iph
->daddr
, iph
->protocol
, initval
);
51 return jhash_3words((__force u32
)iph
->daddr
,
52 (__force u32
)iph
->saddr
, iph
->protocol
, initval
);
55 static inline u32
hash_v6(const struct ipv6hdr
*ip6h
, u32 initval
)
59 if ((__force u32
)ip6h
->saddr
.s6_addr32
[3] <
60 (__force u32
)ip6h
->daddr
.s6_addr32
[3]) {
61 a
= (__force u32
) ip6h
->saddr
.s6_addr32
[3];
62 b
= (__force u32
) ip6h
->daddr
.s6_addr32
[3];
64 b
= (__force u32
) ip6h
->saddr
.s6_addr32
[3];
65 a
= (__force u32
) ip6h
->daddr
.s6_addr32
[3];
68 if ((__force u32
)ip6h
->saddr
.s6_addr32
[1] <
69 (__force u32
)ip6h
->daddr
.s6_addr32
[1])
70 c
= (__force u32
) ip6h
->saddr
.s6_addr32
[1];
72 c
= (__force u32
) ip6h
->daddr
.s6_addr32
[1];
74 return jhash_3words(a
, b
, c
, initval
);
77 static inline u32
hash_bridge(const struct sk_buff
*skb
, u32 initval
)
79 struct ipv6hdr
*ip6h
, _ip6h
;
80 struct iphdr
*iph
, _iph
;
82 switch (eth_hdr(skb
)->h_proto
) {
84 iph
= skb_header_pointer(skb
, skb_network_offset(skb
),
87 return hash_v4(iph
, initval
);
89 case htons(ETH_P_IPV6
):
90 ip6h
= skb_header_pointer(skb
, skb_network_offset(skb
),
91 sizeof(*ip6h
), &_ip6h
);
93 return hash_v6(ip6h
, initval
);
101 nfqueue_hash(const struct sk_buff
*skb
, u16 queue
, u16 queues_total
, u8 family
,
106 queue
+= reciprocal_scale(hash_v4(ip_hdr(skb
), initval
),
110 queue
+= reciprocal_scale(hash_v6(ipv6_hdr(skb
), initval
),
114 queue
+= reciprocal_scale(hash_bridge(skb
, initval
),
122 #endif /* _NF_QUEUE_H */