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1 #ifndef _NFNETLINK_H |
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2 #define _NFNETLINK_H |
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3 #include <linux/types.h> |
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4 #include <linux/netfilter/nfnetlink_compat.h> |
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5 |
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6 enum nfnetlink_groups { |
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7 NFNLGRP_NONE, |
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8 #define NFNLGRP_NONE NFNLGRP_NONE |
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9 NFNLGRP_CONNTRACK_NEW, |
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10 #define NFNLGRP_CONNTRACK_NEW NFNLGRP_CONNTRACK_NEW |
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11 NFNLGRP_CONNTRACK_UPDATE, |
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12 #define NFNLGRP_CONNTRACK_UPDATE NFNLGRP_CONNTRACK_UPDATE |
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13 NFNLGRP_CONNTRACK_DESTROY, |
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14 #define NFNLGRP_CONNTRACK_DESTROY NFNLGRP_CONNTRACK_DESTROY |
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15 NFNLGRP_CONNTRACK_EXP_NEW, |
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16 #define NFNLGRP_CONNTRACK_EXP_NEW NFNLGRP_CONNTRACK_EXP_NEW |
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17 NFNLGRP_CONNTRACK_EXP_UPDATE, |
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18 #define NFNLGRP_CONNTRACK_EXP_UPDATE NFNLGRP_CONNTRACK_EXP_UPDATE |
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19 NFNLGRP_CONNTRACK_EXP_DESTROY, |
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20 #define NFNLGRP_CONNTRACK_EXP_DESTROY NFNLGRP_CONNTRACK_EXP_DESTROY |
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21 __NFNLGRP_MAX, |
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22 }; |
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23 #define NFNLGRP_MAX (__NFNLGRP_MAX - 1) |
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24 |
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25 /* General form of address family dependent message. |
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26 */ |
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27 struct nfgenmsg { |
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28 u_int8_t nfgen_family; /* AF_xxx */ |
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29 u_int8_t version; /* nfnetlink version */ |
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30 __be16 res_id; /* resource id */ |
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31 }; |
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32 |
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33 #define NFNETLINK_V0 0 |
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34 |
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35 /* netfilter netlink message types are split in two pieces: |
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36 * 8 bit subsystem, 8bit operation. |
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37 */ |
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38 |
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39 #define NFNL_SUBSYS_ID(x) ((x & 0xff00) >> 8) |
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40 #define NFNL_MSG_TYPE(x) (x & 0x00ff) |
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41 |
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42 /* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS() |
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43 * won't work anymore */ |
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44 #define NFNL_SUBSYS_NONE 0 |
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45 #define NFNL_SUBSYS_CTNETLINK 1 |
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46 #define NFNL_SUBSYS_CTNETLINK_EXP 2 |
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47 #define NFNL_SUBSYS_QUEUE 3 |
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48 #define NFNL_SUBSYS_ULOG 4 |
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49 #define NFNL_SUBSYS_COUNT 5 |
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50 |
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51 #ifdef __KERNEL__ |
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52 |
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53 #include <linux/netlink.h> |
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54 #include <linux/capability.h> |
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55 #include <net/netlink.h> |
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56 |
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57 struct nfnl_callback |
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58 { |
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59 int (*call)(struct sock *nl, struct sk_buff *skb, |
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60 struct nlmsghdr *nlh, struct nlattr *cda[]); |
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61 const struct nla_policy *policy; /* netlink attribute policy */ |
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62 const u_int16_t attr_count; /* number of nlattr's */ |
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63 }; |
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64 |
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65 struct nfnetlink_subsystem |
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66 { |
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67 const char *name; |
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68 __u8 subsys_id; /* nfnetlink subsystem ID */ |
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69 __u8 cb_count; /* number of callbacks */ |
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70 const struct nfnl_callback *cb; /* callback for individual types */ |
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71 }; |
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72 |
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73 extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n); |
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74 extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n); |
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75 |
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76 extern int nfnetlink_has_listeners(unsigned int group); |
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77 extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, |
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78 int echo); |
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79 extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags); |
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80 |
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81 extern void nfnl_lock(void); |
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82 extern void nfnl_unlock(void); |
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83 |
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84 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \ |
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85 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys)) |
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86 |
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87 #endif /* __KERNEL__ */ |
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88 #endif /* _NFNETLINK_H */ |