1 #ifndef _NFNETLINK_H 2 #define _NFNETLINK_H 3 #include <linux/types.h> 4 #include <libnfnetlink/linux_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 u_int8_t nfgen_family; /* AF_xxx */ 29 u_int8_t version; /* nfnetlink version */ 30 u_int16_t 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_COUNT 5 50 51 #ifdef __KERNEL__ 52 53 #include <linux/netlink.h> 54 #include <linux/capability.h> 55 #include <net/netlink.h> 56 57 struct nfnl_callback 58 { 59 int (*call)(struct sock *nl, struct sk_buff *skb, 60 struct nlmsghdr *nlh, struct nlattr *cda[]); 61 const struct nla_policy *policy; /* netlink attribute policy */ 62 const u_int16_t attr_count; /* number of nlattr's */ 63 }; 64 65 struct nfnetlink_subsystem 66 { 67 const char *name; 68 __u8 subsys_id; /* nfnetlink subsystem ID */ 69 __u8 cb_count; /* number of callbacks */ 70 const struct nfnl_callback *cb; /* callback for individual types */ 71 }; 72 73 extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); 74 extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); 75 76 extern int nfnetlink_has_listeners(unsigned int group); 77 extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, 78 int echo); 79 extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags); 80 81 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ 82 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) 83 84 #endif /* __KERNEL__ */ 85 #endif /* _NFNETLINK_H */ 86