include/net/netfilter/nf_conntrack_zones.h

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

File Facts

System
Linux kernel
Corpus path
include/net/netfilter/nf_conntrack_zones.h
Extension
.h
Size
2040 bytes
Lines
90
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

#ifndef _NF_CONNTRACK_ZONES_H
#define _NF_CONNTRACK_ZONES_H

#include <linux/netfilter/nf_conntrack_zones_common.h>
#include <net/netfilter/nf_conntrack.h>

static inline const struct nf_conntrack_zone *
nf_ct_zone(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	return &ct->zone;
#else
	return &nf_ct_zone_dflt;
#endif
}

static inline const struct nf_conntrack_zone *
nf_ct_zone_init(struct nf_conntrack_zone *zone, u16 id, u8 dir, u8 flags)
{
	zone->id = id;
	zone->flags = flags;
	zone->dir = dir;

	return zone;
}

static inline const struct nf_conntrack_zone *
nf_ct_zone_tmpl(const struct nf_conn *tmpl, const struct sk_buff *skb,
		struct nf_conntrack_zone *tmp)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	if (!tmpl)
		return &nf_ct_zone_dflt;

	if (tmpl->zone.flags & NF_CT_FLAG_MARK)
		return nf_ct_zone_init(tmp, skb->mark, tmpl->zone.dir, 0);
#endif
	return nf_ct_zone(tmpl);
}

static inline void nf_ct_zone_add(struct nf_conn *ct,
				  const struct nf_conntrack_zone *zone)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	ct->zone = *zone;
#endif
}

static inline bool nf_ct_zone_matches_dir(const struct nf_conntrack_zone *zone,
					  enum ip_conntrack_dir dir)
{
	return zone->dir & (1 << dir);
}

static inline u16 nf_ct_zone_id(const struct nf_conntrack_zone *zone,
				enum ip_conntrack_dir dir)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	return nf_ct_zone_matches_dir(zone, dir) ?
	       zone->id : NF_CT_DEFAULT_ZONE_ID;
#else
	return NF_CT_DEFAULT_ZONE_ID;
#endif
}

static inline bool nf_ct_zone_equal(const struct nf_conn *a,
				    const struct nf_conntrack_zone *b,
				    enum ip_conntrack_dir dir)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	return nf_ct_zone_id(nf_ct_zone(a), dir) ==
	       nf_ct_zone_id(b, dir);
#else
	return true;
#endif
}

static inline bool nf_ct_zone_equal_any(const struct nf_conn *a,
					const struct nf_conntrack_zone *b)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
	return nf_ct_zone(a)->id == b->id;
#else
	return true;
#endif
}

#endif /* _NF_CONNTRACK_ZONES_H */

Annotation

Implementation Notes