516299d2f5
The attached patch by Michael Milner adds support for using iptables and ip6tables on bridged traffic encapsulated in ppoe frames, similar to what's already supported for vlan. Signed-off-by: Michael Milner <milner@blissisland.ca> Signed-off-by: Bart De Schuymer <bdschuym@pandora.be> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
85 lines
2 KiB
C
85 lines
2 KiB
C
#ifndef __LINUX_BRIDGE_NETFILTER_H
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#define __LINUX_BRIDGE_NETFILTER_H
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/* bridge-specific defines for netfilter.
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*/
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#include <linux/netfilter.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/if_pppox.h>
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/* Bridge Hooks */
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/* After promisc drops, checksum checks. */
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#define NF_BR_PRE_ROUTING 0
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/* If the packet is destined for this box. */
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#define NF_BR_LOCAL_IN 1
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/* If the packet is destined for another interface. */
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#define NF_BR_FORWARD 2
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/* Packets coming from a local process. */
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#define NF_BR_LOCAL_OUT 3
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/* Packets about to hit the wire. */
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#define NF_BR_POST_ROUTING 4
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/* Not really a hook, but used for the ebtables broute table */
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#define NF_BR_BROUTING 5
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#define NF_BR_NUMHOOKS 6
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#ifdef __KERNEL__
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enum nf_br_hook_priorities {
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NF_BR_PRI_FIRST = INT_MIN,
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NF_BR_PRI_NAT_DST_BRIDGED = -300,
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NF_BR_PRI_FILTER_BRIDGED = -200,
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NF_BR_PRI_BRNF = 0,
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NF_BR_PRI_NAT_DST_OTHER = 100,
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NF_BR_PRI_FILTER_OTHER = 200,
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NF_BR_PRI_NAT_SRC = 300,
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NF_BR_PRI_LAST = INT_MAX,
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};
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#ifdef CONFIG_BRIDGE_NETFILTER
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#define BRNF_PKT_TYPE 0x01
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#define BRNF_BRIDGED_DNAT 0x02
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#define BRNF_DONT_TAKE_PARENT 0x04
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#define BRNF_BRIDGED 0x08
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#define BRNF_NF_BRIDGE_PREROUTING 0x10
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/* Only used in br_forward.c */
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extern int nf_bridge_copy_header(struct sk_buff *skb);
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static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
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{
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if (skb->nf_bridge)
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return nf_bridge_copy_header(skb);
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return 0;
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}
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/* This is called by the IP fragmenting code and it ensures there is
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* enough room for the encapsulating header (if there is one). */
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static inline int nf_bridge_pad(const struct sk_buff *skb)
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{
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int padding = 0;
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if (skb->nf_bridge && skb->protocol == htons(ETH_P_8021Q))
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padding = VLAN_HLEN;
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else if (skb->nf_bridge && skb->protocol == htons(ETH_P_PPP_SES))
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padding = PPPOE_SES_HLEN;
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return padding;
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}
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struct bridge_skb_cb {
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union {
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__be32 ipv4;
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} daddr;
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};
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#else
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#define nf_bridge_maybe_copy_header(skb) (0)
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#define nf_bridge_pad(skb) (0)
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#endif /* CONFIG_BRIDGE_NETFILTER */
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#endif /* __KERNEL__ */
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#endif
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