diff options
Diffstat (limited to 'include/net/netfilter/nf_log.h')
-rw-r--r-- | include/net/netfilter/nf_log.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_log.h b/include/net/netfilter/nf_log.h new file mode 100644 index 000000000..716db4a0f --- /dev/null +++ b/include/net/netfilter/nf_log.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _NF_LOG_H +#define _NF_LOG_H + +#include <linux/netfilter.h> +#include <linux/netfilter/nf_log.h> + +/* Log tcp sequence, tcp options, ip options and uid owning local socket */ +#define NF_LOG_DEFAULT_MASK 0x0f + +/* This flag indicates that copy_len field in nf_loginfo is set */ +#define NF_LOG_F_COPY_LEN 0x1 + +enum nf_log_type { + NF_LOG_TYPE_LOG = 0, + NF_LOG_TYPE_ULOG, + NF_LOG_TYPE_MAX +}; + +struct nf_loginfo { + u_int8_t type; + union { + struct { + /* copy_len will be used iff you set + * NF_LOG_F_COPY_LEN in flags + */ + u_int32_t copy_len; + u_int16_t group; + u_int16_t qthreshold; + u_int16_t flags; + } ulog; + struct { + u_int8_t level; + u_int8_t logflags; + } log; + } u; +}; + +typedef void nf_logfn(struct net *net, + u_int8_t pf, + unsigned int hooknum, + const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *li, + const char *prefix); + +struct nf_logger { + char *name; + enum nf_log_type type; + nf_logfn *logfn; + struct module *me; +}; + +/* sysctl_nf_log_all_netns - allow LOG target in all network namespaces */ +extern int sysctl_nf_log_all_netns; + +/* Function to register/unregister log function. */ +int nf_log_register(u_int8_t pf, struct nf_logger *logger); +void nf_log_unregister(struct nf_logger *logger); + +int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger); +void nf_log_unset(struct net *net, const struct nf_logger *logger); + +int nf_log_bind_pf(struct net *net, u_int8_t pf, + const struct nf_logger *logger); +void nf_log_unbind_pf(struct net *net, u_int8_t pf); + +int nf_logger_find_get(int pf, enum nf_log_type type); +void nf_logger_put(int pf, enum nf_log_type type); +void nf_logger_request_module(int pf, enum nf_log_type type); + +#define MODULE_ALIAS_NF_LOGGER(family, type) \ + MODULE_ALIAS("nf-logger-" __stringify(family) "-" __stringify(type)) + +/* Calls the registered backend logging function */ +__printf(8, 9) +void nf_log_packet(struct net *net, + u_int8_t pf, + unsigned int hooknum, + const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *li, + const char *fmt, ...); + +__printf(8, 9) +void nf_log_trace(struct net *net, + u_int8_t pf, + unsigned int hooknum, + const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *li, + const char *fmt, ...); + +struct nf_log_buf; + +struct nf_log_buf *nf_log_buf_open(void); +__printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...); +void nf_log_buf_close(struct nf_log_buf *m); + +/* common logging functions */ +int nf_log_dump_udp_header(struct nf_log_buf *m, const struct sk_buff *skb, + u8 proto, int fragment, unsigned int offset); +int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb, + u8 proto, int fragment, unsigned int offset, + unsigned int logflags); +void nf_log_dump_sk_uid_gid(struct net *net, struct nf_log_buf *m, + struct sock *sk); +void nf_log_dump_vlan(struct nf_log_buf *m, const struct sk_buff *skb); +void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf, + unsigned int hooknum, const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *loginfo, + const char *prefix); +void nf_log_l2packet(struct net *net, u_int8_t pf, + __be16 protocol, + unsigned int hooknum, + const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *loginfo, const char *prefix); + +#endif /* _NF_LOG_H */ |