1 #ifndef _NFNETLINK_H 2 #define _NFNETLINK_H 3 #include <linux/types.h> 4 #include <linux/netfilter/nfnetlink_compat.h> 5 6 enum 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 */ 27 struct 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_CTNETLINK_TIMEOUT 8 53 #define NFNL_SUBSYS_COUNT 9 54 55 #ifdef __KERNEL__ 56 57 #include <linux/netlink.h> 58 #include <linux/capability.h> 59 #include <net/netlink.h> 60 61 struct nfnl_callback { 62 int (*call)(struct sock *nl, struct sk_buff *skb, 63 const struct nlmsghdr *nlh, 64 const struct nlattr * const cda[]); 65 int (*call_rcu)(struct sock *nl, struct sk_buff *skb, 66 const struct nlmsghdr *nlh, 67 const struct nlattr * const cda[]); 68 const struct nla_policy *policy; /* netlink attribute policy */ 69 const u_int16_t attr_count; /* number of nlattr's */ 70 }; 71 72 struct nfnetlink_subsystem { 73 const char *name; 74 __u8 subsys_id; /* nfnetlink subsystem ID */ 75 __u8 cb_count; /* number of callbacks */ 76 const struct nfnl_callback *cb; /* callback for individual types */ 77 }; 78 79 extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); 80 extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); 81 82 extern int nfnetlink_has_listeners(struct net *net, unsigned int group); 83 extern int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, 84 int echo, gfp_t flags); 85 extern int nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error); 86 extern int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u_int32_t pid, int flags); 87 88 extern void nfnl_lock(void); 89 extern void nfnl_unlock(void); 90 91 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ 92 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) 93 94 #endif /* __KERNEL__ */ 95 #endif /* _NFNETLINK_H */ 96