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