Release 4.7 include/net/netfilter/nf_conntrack_l3proto.h

/*
 * Copyright (C)2003,2004 USAGI/WIDE Project
 *
 * Header for use in defining a given L3 protocol for connection tracking.
 *
 * Author:
 *      Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
 *
 * Derived from include/netfilter_ipv4/ip_conntrack_protocol.h
 */

#ifndef _NF_CONNTRACK_L3PROTO_H

#define _NF_CONNTRACK_L3PROTO_H
#include <linux/netlink.h>
#include <net/netlink.h>
#include <linux/seq_file.h>
#include <net/netfilter/nf_conntrack.h>


struct nf_conntrack_l3proto {
	/* L3 Protocol Family number. ex) PF_INET */
	
u_int16_t l3proto;

	/* Protocol name */
	
const char *name;

	/*
         * Try to fill in the third arg: nhoff is offset of l3 proto
         * hdr.  Return true if possible.
         */
	
bool (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int nhoff,
			     struct nf_conntrack_tuple *tuple);

	/*
         * Invert the per-proto part of the tuple: ie. turn xmit into reply.
         * Some packets can't be inverted: return 0 in that case.
         */
	
bool (*invert_tuple)(struct nf_conntrack_tuple *inverse,
			     const struct nf_conntrack_tuple *orig);

	/* Print out the per-protocol part of the tuple. */
	
void (*print_tuple)(struct seq_file *s,
			    const struct nf_conntrack_tuple *);

	/*
         * Called before tracking. 
         *      *dataoff: offset of protocol header (TCP, UDP,...) in skb
         *      *protonum: protocol number
         */
	
int (*get_l4proto)(const struct sk_buff *skb, unsigned int nhoff,
			   unsigned int *dataoff, u_int8_t *protonum);

	
int (*tuple_to_nlattr)(struct sk_buff *skb,
			       const struct nf_conntrack_tuple *t);

	/*
         * Calculate size of tuple nlattr
         */
	
int (*nlattr_tuple_size)(void);

	
int (*nlattr_to_tuple)(struct nlattr *tb[],
			       struct nf_conntrack_tuple *t);
	
const struct nla_policy *nla_policy;

	
size_t nla_size;

#ifdef CONFIG_SYSCTL
	
const char		*ctl_table_path;
#endif /* CONFIG_SYSCTL */

	/* Init l3proto pernet data */
	
int (*init_net)(struct net *net);

	/* Module (if any) which this is connected to. */
	
struct module *me;
};

extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];

/* Protocol pernet registration. */
int nf_ct_l3proto_pernet_register(struct net *net,
				  struct nf_conntrack_l3proto *proto);
void nf_ct_l3proto_pernet_unregister(struct net *net,
				     struct nf_conntrack_l3proto *proto);

/* Protocol global registration. */
int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto);
void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto);

struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto);

/* Existing built-in protocols */
extern struct nf_conntrack_l3proto nf_conntrack_l3proto_generic;


static inline struct nf_conntrack_l3proto *

__nf_ct_l3proto_find(u_int16_t l3proto)
{
	if (unlikely(l3proto >= AF_MAX))
		return &nf_conntrack_l3proto_generic;
	return rcu_dereference(nf_ct_l3protos[l3proto]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
yasuyuki kozakai
yasuyuki kozakai
30
88.24%
1
33.33%
patrick mchardy
patrick mchardy
3
8.82%
1
33.33%
martin josefsson
martin josefsson
1
2.94%
1
33.33%
Total
34
100.00%
3
100.00%

#endif /*_NF_CONNTRACK_L3PROTO_H*/
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
yasuyuki kozakai
yasuyuki kozakai
180
56.96%
3
16.67%
gao feng
gao feng
45
14.24%
2
11.11%
pablo neira ayuso
pablo neira ayuso
42
13.29%
1
5.56%
patrick mchardy
patrick mchardy
28
8.86%
6
33.33%
holger eitzenberger
holger eitzenberger
13
4.11%
1
5.56%
martin josefsson
martin josefsson
2
0.63%
1
5.56%
jan engelhardt
jan engelhardt
2
0.63%
1
5.56%
eric w. biederman
eric w. biederman
2
0.63%
1
5.56%
eric dumazet
eric dumazet
1
0.32%
1
5.56%
joe perches
joe perches
1
0.32%
1
5.56%
Total
316
100.00%
18
100.00%
  
Directory: include/net/netfilter

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