projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __LINUX_BRIDGE_NETFILTER_H |
| 2 | #define __LINUX_BRIDGE_NETFILTER_H | |
| 3 | ||
| 4 | /* bridge-specific defines for netfilter. | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/config.h> | |
| 8 | #include <linux/netfilter.h> | |
| 9 | #if defined(__KERNEL__) && defined(CONFIG_BRIDGE_NETFILTER) | |
| 10 | #include <asm/atomic.h> | |
| 11 | #include <linux/if_ether.h> | |
| 12 | #endif | |
| 13 | ||
| 14 | /* Bridge Hooks */ | |
| 15 | /* After promisc drops, checksum checks. */ | |
| 16 | #define NF_BR_PRE_ROUTING 0 | |
| 17 | /* If the packet is destined for this box. */ | |
| 18 | #define NF_BR_LOCAL_IN 1 | |
| 19 | /* If the packet is destined for another interface. */ | |
| 20 | #define NF_BR_FORWARD 2 | |
| 21 | /* Packets coming from a local process. */ | |
| 22 | #define NF_BR_LOCAL_OUT 3 | |
| 23 | /* Packets about to hit the wire. */ | |
| 24 | #define NF_BR_POST_ROUTING 4 | |
| 25 | /* Not really a hook, but used for the ebtables broute table */ | |
| 26 | #define NF_BR_BROUTING 5 | |
| 27 | #define NF_BR_NUMHOOKS 6 | |
| 28 | ||
| 29 | #ifdef __KERNEL__ | |
| 30 | ||
| 31 | enum nf_br_hook_priorities { | |
| 32 | NF_BR_PRI_FIRST = INT_MIN, | |
| 33 | NF_BR_PRI_NAT_DST_BRIDGED = -300, | |
| 34 | NF_BR_PRI_FILTER_BRIDGED = -200, | |
| 35 | NF_BR_PRI_BRNF = 0, | |
| 36 | NF_BR_PRI_NAT_DST_OTHER = 100, | |
| 37 | NF_BR_PRI_FILTER_OTHER = 200, | |
| 38 | NF_BR_PRI_NAT_SRC = 300, | |
| 39 | NF_BR_PRI_LAST = INT_MAX, | |
| 40 | }; | |
| 41 | ||
| 42 | #ifdef CONFIG_BRIDGE_NETFILTER | |
| 43 | ||
| 44 | #define BRNF_PKT_TYPE 0x01 | |
| 45 | #define BRNF_BRIDGED_DNAT 0x02 | |
| 46 | #define BRNF_DONT_TAKE_PARENT 0x04 | |
| 47 | #define BRNF_BRIDGED 0x08 | |
| 48 | #define BRNF_NF_BRIDGE_PREROUTING 0x10 | |
| 49 | ||
| 1da177e4 LT |
50 | |
| 51 | /* Only used in br_forward.c */ | |
| 52 | static inline | |
| 53 | void nf_bridge_maybe_copy_header(struct sk_buff *skb) | |
| 54 | { | |
| 55 | if (skb->nf_bridge) { | |
| 56 | if (skb->protocol == __constant_htons(ETH_P_8021Q)) { | |
| 57 | memcpy(skb->data - 18, skb->nf_bridge->data, 18); | |
| 58 | skb_push(skb, 4); | |
| 59 | } else | |
| 60 | memcpy(skb->data - 16, skb->nf_bridge->data, 16); | |
| 61 | } | |
| 62 | } | |
| 63 | ||
| 1da177e4 LT |
64 | /* This is called by the IP fragmenting code and it ensures there is |
| 65 | * enough room for the encapsulating header (if there is one). */ | |
| 66 | static inline | |
| 67 | int nf_bridge_pad(struct sk_buff *skb) | |
| 68 | { | |
| 69 | if (skb->protocol == __constant_htons(ETH_P_IP)) | |
| 70 | return 0; | |
| 71 | if (skb->nf_bridge) { | |
| 72 | if (skb->protocol == __constant_htons(ETH_P_8021Q)) | |
| 73 | return 4; | |
| 74 | } | |
| 75 | return 0; | |
| 76 | } | |
| 77 | ||
| 78 | struct bridge_skb_cb { | |
| 79 | union { | |
| 80 | __u32 ipv4; | |
| 81 | } daddr; | |
| 82 | }; | |
| 83 | #endif /* CONFIG_BRIDGE_NETFILTER */ | |
| 84 | ||
| 85 | #endif /* __KERNEL__ */ | |
| 86 | #endif |