include/net/netfilter/nf_conntrack_core.h

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

File Facts

System
Linux kernel
Corpus path
include/net/netfilter/nf_conntrack_core.h
Extension
.h
Size
3241 bytes
Lines
109
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

if (!nf_ct_is_confirmed(ct)) {
			ret = __nf_conntrack_confirm(skb);

			if (ret == NF_ACCEPT)
				ct = (struct nf_conn *)skb_nfct(skb);
		}

		if (ret == NF_ACCEPT && nf_ct_ecache_exist(ct))
			nf_ct_deliver_cached_events(ct);
	}
	return ret;
}

unsigned int nf_confirm(void *priv, struct sk_buff *skb, const struct nf_hook_state *state);

void print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
		 const struct nf_conntrack_l4proto *proto);

#define CONNTRACK_LOCKS 1024

extern spinlock_t nf_conntrack_locks[CONNTRACK_LOCKS];
void nf_conntrack_lock(spinlock_t *lock);

extern spinlock_t nf_conntrack_expect_lock;

static inline void lockdep_nfct_expect_lock_held(void)
{
	lockdep_assert_held(&nf_conntrack_expect_lock);
}

/* ctnetlink code shared by both ctnetlink and nf_conntrack_bpf */

static inline void __nf_ct_set_timeout(struct nf_conn *ct, u64 timeout)
{
	if (timeout > INT_MAX)
		timeout = INT_MAX;

	if (nf_ct_is_confirmed(ct))
		WRITE_ONCE(ct->timeout, nfct_time_stamp + (u32)timeout);
	else
		ct->timeout = (u32)timeout;
}

int __nf_ct_change_timeout(struct nf_conn *ct, u64 cta_timeout);
void __nf_ct_change_status(struct nf_conn *ct, unsigned long on, unsigned long off);
int nf_ct_change_status_common(struct nf_conn *ct, unsigned int status);

#endif /* _NF_CONNTRACK_CORE_H */

Annotation

Implementation Notes