include/net/netfilter/nft_fib.h

Source file repositories/reference/linux-study-clean/include/net/netfilter/nft_fib.h

File Facts

System
Linux kernel
Corpus path
include/net/netfilter/nft_fib.h
Extension
.h
Size
1904 bytes
Lines
70
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

struct nft_fib {
	u8			dreg;
	u8			result;
	u32			flags;
};

extern const struct nla_policy nft_fib_policy[];

static inline bool
nft_fib_is_loopback(const struct sk_buff *skb, const struct net_device *in)
{
	return skb->pkt_type == PACKET_LOOPBACK || in->flags & IFF_LOOPBACK;
}

static inline bool nft_fib_can_skip(const struct nft_pktinfo *pkt)
{
	const struct net_device *indev = nft_in(pkt);
	const struct sock *sk;

	switch (nft_hook(pkt)) {
	case NF_INET_PRE_ROUTING:
	case NF_INET_INGRESS:
	case NF_INET_LOCAL_IN:
		break;
	default:
		return false;
	}

	sk = pkt->skb->sk;
	if (sk && sk_fullsock(sk))
	       return sk->sk_rx_dst_ifindex == indev->ifindex;

	return nft_fib_is_loopback(pkt->skb, indev);
}

static inline int nft_fib_l3mdev_master_ifindex_rcu(const struct nft_pktinfo *pkt,
						    const struct net_device *iif)
{
	const struct net_device *dev = iif ? iif : pkt->skb->dev;

	return l3mdev_master_ifindex_rcu(dev);
}

int nft_fib_dump(struct sk_buff *skb, const struct nft_expr *expr, bool reset);
int nft_fib_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
		 const struct nlattr * const tb[]);
int nft_fib_validate(const struct nft_ctx *ctx, const struct nft_expr *expr);

void nft_fib4_eval_type(const struct nft_expr *expr, struct nft_regs *regs,
			const struct nft_pktinfo *pkt);
void nft_fib4_eval(const struct nft_expr *expr, struct nft_regs *regs,
		   const struct nft_pktinfo *pkt);

void nft_fib6_eval_type(const struct nft_expr *expr, struct nft_regs *regs,
			const struct nft_pktinfo *pkt);
void nft_fib6_eval(const struct nft_expr *expr, struct nft_regs *regs,
		   const struct nft_pktinfo *pkt);

void nft_fib_store_result(void *reg, const struct nft_fib *priv,
			  const struct net_device *dev);

#endif

Annotation

Implementation Notes