LXR linux/include/linux/netfilter/nfnetlink.h

   1#ifndef _NFNETLINK_H
   2#define _NFNETLINK_H
   3
   4
   5#include <linux/netlink.h>
   6#include <linux/capability.h>
   7#include <net/netlink.h>
   8#include <uapi/linux/netfilter/nfnetlink.h>
   9
  10struct nfnl_callback {
  11        int (*call)(struct sock *nl, struct sk_buff *skb, 
  12                    const struct nlmsghdr *nlh,
  13                    const struct nlattr * const cda[]);
  14        int (*call_rcu)(struct sock *nl, struct sk_buff *skb, 
  15                    const struct nlmsghdr *nlh,
  16                    const struct nlattr * const cda[]);
  17        int (*call_batch)(struct sock *nl, struct sk_buff *skb,
  18                          const struct nlmsghdr *nlh,
  19                          const struct nlattr * const cda[]);
  20        const struct nla_policy *policy;        /* netlink attribute policy */
  21        const u_int16_t attr_count;             /* number of nlattr's */
  22};
  23
  24struct nfnetlink_subsystem {
  25        const char *name;
  26        __u8 subsys_id;                 /* nfnetlink subsystem ID */
  27        __u8 cb_count;                  /* number of callbacks */
  28        const struct nfnl_callback *cb; /* callback for individual types */
  29        int (*commit)(struct sk_buff *skb);
  30        int (*abort)(struct sk_buff *skb);
  31};
  32
  33int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
  34int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
  35
  36int nfnetlink_has_listeners(struct net *net, unsigned int group);
  37struct sk_buff *nfnetlink_alloc_skb(struct net *net, unsigned int size,
  38                                    u32 dst_portid, gfp_t gfp_mask);
  39int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
  40                   unsigned int group, int echo, gfp_t flags);
  41int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
  42int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid,
  43                      int flags);
  44
  45void nfnl_lock(__u8 subsys_id);
  46void nfnl_unlock(__u8 subsys_id);
  47
  48#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
  49        MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
  50
  51#endif  /* _NFNETLINK_H */
  52