LXR linux/include/net/netfilter/nf

   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
  15enum nf_log_type {
  16        NF_LOG_TYPE_LOG         = 0,
  17        NF_LOG_TYPE_ULOG,
  18        NF_LOG_TYPE_MAX
  19};
  20
  21struct nf_loginfo {
  22        u_int8_t type;
  23        union {
  24                struct {
  25                        u_int32_t copy_len;
  26                        u_int16_t group;
  27                        u_int16_t qthreshold;
  28                } ulog;
  29                struct {
  30                        u_int8_t level;
  31                        u_int8_t logflags;
  32                } log;
  33        } u;
  34};
  35
  36typedef void nf_logfn(struct net *net,
  37                      u_int8_t pf,
  38                      unsigned int hooknum,
  39                      const struct sk_buff *skb,
  40                      const struct net_device *in,
  41                      const struct net_device *out,
  42                      const struct nf_loginfo *li,
  43                      const char *prefix);
  44
  45struct nf_logger {
  46        char                    *name;
  47        enum nf_log_type        type;
  48        nf_logfn                *logfn;
  49        struct module           *me;
  50};
  51
  52/* Function to register/unregister log function. */
  53int nf_log_register(u_int8_t pf, struct nf_logger *logger);
  54void nf_log_unregister(struct nf_logger *logger);
  55
  56void nf_log_set(struct net *net, u_int8_t pf,
  57                const struct nf_logger *logger);
  58void nf_log_unset(struct net *net, const struct nf_logger *logger);
  59
  60int nf_log_bind_pf(struct net *net, u_int8_t pf,
  61                   const struct nf_logger *logger);
  62void nf_log_unbind_pf(struct net *net, u_int8_t pf);
  63
  64int nf_logger_find_get(int pf, enum nf_log_type type);
  65void nf_logger_put(int pf, enum nf_log_type type);
  66void nf_logger_request_module(int pf, enum nf_log_type type);
  67
  68#define MODULE_ALIAS_NF_LOGGER(family, type) \
  69        MODULE_ALIAS("nf-logger-" __stringify(family) "-" __stringify(type))
  70
  71/* Calls the registered backend logging function */
  72__printf(8, 9)
  73void nf_log_packet(struct net *net,
  74                   u_int8_t pf,
  75                   unsigned int hooknum,
  76                   const struct sk_buff *skb,
  77                   const struct net_device *in,
  78                   const struct net_device *out,
  79                   const struct nf_loginfo *li,
  80                   const char *fmt, ...);
  81
  82__printf(8, 9)
  83void nf_log_trace(struct net *net,
  84                  u_int8_t pf,
  85                  unsigned int hooknum,
  86                  const struct sk_buff *skb,
  87                  const struct net_device *in,
  88                  const struct net_device *out,
  89                  const struct nf_loginfo *li,
  90                  const char *fmt, ...);
  91
  92struct nf_log_buf;
  93
  94struct nf_log_buf *nf_log_buf_open(void);
  95__printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...);
  96void nf_log_buf_close(struct nf_log_buf *m);
  97
  98/* common logging functions */
  99int nf_log_dump_udp_header(struct nf_log_buf *m, const struct sk_buff *skb,
 100                           u8 proto, int fragment, unsigned int offset);
 101int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb,
 102                           u8 proto, int fragment, unsigned int offset,
 103                           unsigned int logflags);
 104void nf_log_dump_sk_uid_gid(struct nf_log_buf *m, struct sock *sk);
 105void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
 106                               unsigned int hooknum, const struct sk_buff *skb,
 107                               const struct net_device *in,
 108                               const struct net_device *out,
 109                               const struct nf_loginfo *loginfo,
 110                               const char *prefix);
 111
 112#endif /* _NF_LOG_H */
 113