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_IPSET 6 51#define NFNL_SUBSYS_ACCT 7 52#define NFNL_SUBSYS_COUNT 8 53 54#ifdef __KERNEL__ 55 56#include <linux/netlink.h> 57#include <linux/capability.h> 58#include <net/netlink.h> 59 60struct nfnl_callback { 61 int (*call)(struct sock *nl, struct sk_buff *skb, 62 const struct nlmsghdr *nlh, 63 const struct nlattr * const cda[]); 64 int (*call_rcu)(struct sock *nl, struct sk_buff *skb, 65 const struct nlmsghdr *nlh, 66 const struct nlattr * const cda[]); 67 const struct nla_policy *policy; /* netlink attribute policy */ 68 const u_int16_t attr_count; /* number of nlattr's */ 69}; 70 71struct nfnetlink_subsystem { 72 const char *name; 73 __u8 subsys_id; /* nfnetlink subsystem ID */ 74 __u8 cb_count; /* number of callbacks */ 75 const struct nfnl_callback *cb; /* callback for individual types */ 76}; 77 78extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); 79extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); 80 81extern int nfnetlink_has_listeners(struct net *net, unsigned int group); 82extern int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, 83 int echo, gfp_t flags); 84extern int nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error); 85extern int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u_int32_t pid, int flags); 86 87extern void nfnl_lock(void); 88extern void nfnl_unlock(void); 89 90#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ 91 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) 92 93#endif /* __KERNEL__ */ 94#endif /* _NFNETLINK_H */ 95