include/net/netfilter/nf_log.h

   1 #ifndef _NF_LOG_H
   2 #define _NF_LOG_H
   3
   4 #include <linux/netfilter.h>
   5
   6 /* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
   7  * disappear once iptables is replaced with pkttables.  Please DO NOT use them
   8  * for any new code! */
   9 #define NF_LOG_TCPSEQ           0x01    /* Log TCP sequence numbers */
  10 #define NF_LOG_TCPOPT           0x02    /* Log TCP options */
  11 #define NF_LOG_IPOPT            0x04    /* Log IP options */
  12 #define NF_LOG_UID              0x08    /* Log UID owning local socket */
  13 #define NF_LOG_MASK             0x0f
  14
  15 #define NF_LOG_TYPE_LOG         0x01
  16 #define NF_LOG_TYPE_ULOG        0x02
  17
  18 struct nf_loginfo {
  19         u_int8_t type;
  20         union {
  21                 struct {
  22                         u_int32_t copy_len;
  23                         u_int16_t group;
  24                         u_int16_t qthreshold;
  25                 } ulog;
  26                 struct {
  27                         u_int8_t level;
  28                         u_int8_t logflags;
  29                 } log;
  30         } u;
  31 };
  32
  33 typedef void nf_logfn(u_int8_t pf,
  34                       unsigned int hooknum,
  35                       const struct sk_buff *skb,
  36                       const struct net_device *in,
  37                       const struct net_device *out,
  38                       const struct nf_loginfo *li,
  39                       const char *prefix);
  40
  41 struct nf_logger {
  42         struct module   *me;
  43         nf_logfn        *logfn;
  44         char            *name;
  45         struct list_head        list[NFPROTO_NUMPROTO];
  46 };
  47
  48 /* Function to register/unregister log function. */
  49 int nf_log_register(u_int8_t pf, struct nf_logger *logger);
  50 void nf_log_unregister(struct nf_logger *logger);
  51
  52 int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger);
  53 void nf_log_unbind_pf(u_int8_t pf);
  54
  55 /* Calls the registered backend logging function */
  56 __printf(7, 8)
  57 void nf_log_packet(u_int8_t pf,
  58                    unsigned int hooknum,
  59                    const struct sk_buff *skb,
  60                    const struct net_device *in,
  61                    const struct net_device *out,
  62                    const struct nf_loginfo *li,
  63                    const char *fmt, ...);
  64
  65 #endif /* _NF_LOG_H */