tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _NFNETLINK_H
2#define _NFNETLINK_H
3#include <linux/types.h>
4#include <linux/netfilter/nfnetlink_compat.h>
5
6enum nfnetlink_groups {
7 NFNLGRP_NONE,
8#define NFNLGRP_NONE NFNLGRP_NONE
9 NFNLGRP_CONNTRACK_NEW,
10#define NFNLGRP_CONNTRACK_NEW NFNLGRP_CONNTRACK_NEW
11 NFNLGRP_CONNTRACK_UPDATE,
12#define NFNLGRP_CONNTRACK_UPDATE NFNLGRP_CONNTRACK_UPDATE
13 NFNLGRP_CONNTRACK_DESTROY,
14#define NFNLGRP_CONNTRACK_DESTROY NFNLGRP_CONNTRACK_DESTROY
15 NFNLGRP_CONNTRACK_EXP_NEW,
16#define NFNLGRP_CONNTRACK_EXP_NEW NFNLGRP_CONNTRACK_EXP_NEW
17 NFNLGRP_CONNTRACK_EXP_UPDATE,
18#define NFNLGRP_CONNTRACK_EXP_UPDATE NFNLGRP_CONNTRACK_EXP_UPDATE
19 NFNLGRP_CONNTRACK_EXP_DESTROY,
20#define NFNLGRP_CONNTRACK_EXP_DESTROY NFNLGRP_CONNTRACK_EXP_DESTROY
21 __NFNLGRP_MAX,
22};
23#define NFNLGRP_MAX (__NFNLGRP_MAX - 1)
24
25/* General form of address family dependent message.
26 */
27struct nfgenmsg {
28 __u8 nfgen_family; /* AF_xxx */
29 __u8 version; /* nfnetlink version */
30 __be16 res_id; /* resource id */
31};
32
33#define NFNETLINK_V0 0
34
35/* netfilter netlink message types are split in two pieces:
36 * 8 bit subsystem, 8bit operation.
37 */
38
39#define NFNL_SUBSYS_ID(x) ((x & 0xff00) >> 8)
40#define NFNL_MSG_TYPE(x) (x & 0x00ff)
41
42/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS()
43 * won't work anymore */
44#define NFNL_SUBSYS_NONE 0
45#define NFNL_SUBSYS_CTNETLINK 1
46#define NFNL_SUBSYS_CTNETLINK_EXP 2
47#define NFNL_SUBSYS_QUEUE 3
48#define NFNL_SUBSYS_ULOG 4
49#define NFNL_SUBSYS_OSF 5
50#define NFNL_SUBSYS_COUNT 6
51
52#ifdef __KERNEL__
53
54#include <linux/netlink.h>
55#include <linux/capability.h>
56#include <net/netlink.h>
57
58struct nfnl_callback
59{
60 int (*call)(struct sock *nl, struct sk_buff *skb,
61 const struct nlmsghdr *nlh,
62 const struct nlattr * const cda[]);
63 const struct nla_policy *policy; /* netlink attribute policy */
64 const u_int16_t attr_count; /* number of nlattr's */
65};
66
67struct nfnetlink_subsystem
68{
69 const char *name;
70 __u8 subsys_id; /* nfnetlink subsystem ID */
71 __u8 cb_count; /* number of callbacks */
72 const struct nfnl_callback *cb; /* callback for individual types */
73};
74
75extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
76extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
77
78extern int nfnetlink_has_listeners(unsigned int group);
79extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group,
80 int echo, gfp_t flags);
81extern void nfnetlink_set_err(u32 pid, u32 group, int error);
82extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);
83
84extern void nfnl_lock(void);
85extern void nfnl_unlock(void);
86
87#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
88 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
89
90#endif /* __KERNEL__ */
91#endif /* _NFNETLINK_H */