LXR linux/include/linux/netfilter

   1#ifndef __LINUX_BRIDGE_NETFILTER_H
   2#define __LINUX_BRIDGE_NETFILTER_H
   3
   4#include <uapi/linux/netfilter_bridge.h>
   5#include <linux/skbuff.h>
   6
   7enum nf_br_hook_priorities {
   8        NF_BR_PRI_FIRST = INT_MIN,
   9        NF_BR_PRI_NAT_DST_BRIDGED = -300,
  10        NF_BR_PRI_FILTER_BRIDGED = -200,
  11        NF_BR_PRI_BRNF = 0,
  12        NF_BR_PRI_NAT_DST_OTHER = 100,
  13        NF_BR_PRI_FILTER_OTHER = 200,
  14        NF_BR_PRI_NAT_SRC = 300,
  15        NF_BR_PRI_LAST = INT_MAX,
  16};
  17
  18#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
  19
  20#define BRNF_BRIDGED_DNAT               0x02
  21#define BRNF_NF_BRIDGE_PREROUTING       0x08
  22
  23static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
  24{
  25        if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE)
  26                return PPPOE_SES_HLEN;
  27        return 0;
  28}
  29
  30int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
  31
  32static inline void br_drop_fake_rtable(struct sk_buff *skb)
  33{
  34        struct dst_entry *dst = skb_dst(skb);
  35
  36        if (dst && (dst->flags & DST_FAKE_RTABLE))
  37                skb_dst_drop(skb);
  38}
  39
  40static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
  41{
  42        struct nf_bridge_info *nf_bridge;
  43
  44        if (skb->nf_bridge == NULL)
  45                return 0;
  46
  47        nf_bridge = skb->nf_bridge;
  48        return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
  49}
  50
  51static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
  52{
  53        struct nf_bridge_info *nf_bridge;
  54
  55        if (skb->nf_bridge == NULL)
  56                return 0;
  57
  58        nf_bridge = skb->nf_bridge;
  59        return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
  60}
  61
  62static inline struct net_device *
  63nf_bridge_get_physindev(const struct sk_buff *skb)
  64{
  65        return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
  66}
  67
  68static inline struct net_device *
  69nf_bridge_get_physoutdev(const struct sk_buff *skb)
  70{
  71        return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
  72}
  73#else
  74#define br_drop_fake_rtable(skb)                do { } while (0)
  75#endif /* CONFIG_BRIDGE_NETFILTER */
  76
  77#endif
  78