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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f01ffbd6 PM |
2 | #ifndef _NF_LOG_H |
3 | #define _NF_LOG_H | |
4 | ||
ca735b3a | 5 | #include <linux/netfilter.h> |
ff107d27 | 6 | #include <linux/netfilter/nf_log.h> |
ca735b3a | 7 | |
ff107d27 LZ |
8 | /* Log tcp sequence, tcp options, ip options and uid owning local socket */ |
9 | #define NF_LOG_DEFAULT_MASK 0x0f | |
f01ffbd6 | 10 | |
7643507f VP |
11 | /* This flag indicates that copy_len field in nf_loginfo is set */ |
12 | #define NF_LOG_F_COPY_LEN 0x1 | |
13 | ||
5962815a PNA |
14 | enum nf_log_type { |
15 | NF_LOG_TYPE_LOG = 0, | |
16 | NF_LOG_TYPE_ULOG, | |
17 | NF_LOG_TYPE_MAX | |
18 | }; | |
f01ffbd6 PM |
19 | |
20 | struct nf_loginfo { | |
21 | u_int8_t type; | |
22 | union { | |
23 | struct { | |
7643507f VP |
24 | /* copy_len will be used iff you set |
25 | * NF_LOG_F_COPY_LEN in flags | |
26 | */ | |
f01ffbd6 PM |
27 | u_int32_t copy_len; |
28 | u_int16_t group; | |
29 | u_int16_t qthreshold; | |
7643507f | 30 | u_int16_t flags; |
f01ffbd6 PM |
31 | } ulog; |
32 | struct { | |
33 | u_int8_t level; | |
34 | u_int8_t logflags; | |
35 | } log; | |
36 | } u; | |
37 | }; | |
38 | ||
8cdb46da HS |
39 | typedef void nf_logfn(struct net *net, |
40 | u_int8_t pf, | |
f01ffbd6 PM |
41 | unsigned int hooknum, |
42 | const struct sk_buff *skb, | |
43 | const struct net_device *in, | |
44 | const struct net_device *out, | |
45 | const struct nf_loginfo *li, | |
46 | const char *prefix); | |
47 | ||
48 | struct nf_logger { | |
5962815a PNA |
49 | char *name; |
50 | enum nf_log_type type; | |
51 | nf_logfn *logfn; | |
52 | struct module *me; | |
f01ffbd6 PM |
53 | }; |
54 | ||
2851940f MK |
55 | /* sysctl_nf_log_all_netns - allow LOG target in all network namespaces */ |
56 | extern int sysctl_nf_log_all_netns; | |
57 | ||
f01ffbd6 | 58 | /* Function to register/unregister log function. */ |
ca735b3a EL |
59 | int nf_log_register(u_int8_t pf, struct nf_logger *logger); |
60 | void nf_log_unregister(struct nf_logger *logger); | |
61 | ||
779994fa | 62 | int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger); |
30e0c6a6 G |
63 | void nf_log_unset(struct net *net, const struct nf_logger *logger); |
64 | ||
65 | int nf_log_bind_pf(struct net *net, u_int8_t pf, | |
66 | const struct nf_logger *logger); | |
67 | void nf_log_unbind_pf(struct net *net, u_int8_t pf); | |
f01ffbd6 | 68 | |
fab4085f PNA |
69 | int nf_logger_find_get(int pf, enum nf_log_type type); |
70 | void nf_logger_put(int pf, enum nf_log_type type); | |
960649d1 | 71 | void nf_logger_request_module(int pf, enum nf_log_type type); |
fab4085f PNA |
72 | |
73 | #define MODULE_ALIAS_NF_LOGGER(family, type) \ | |
74 | MODULE_ALIAS("nf-logger-" __stringify(family) "-" __stringify(type)) | |
75 | ||
f01ffbd6 | 76 | /* Calls the registered backend logging function */ |
30e0c6a6 G |
77 | __printf(8, 9) |
78 | void nf_log_packet(struct net *net, | |
79 | u_int8_t pf, | |
f01ffbd6 PM |
80 | unsigned int hooknum, |
81 | const struct sk_buff *skb, | |
82 | const struct net_device *in, | |
83 | const struct net_device *out, | |
7b2f9631 | 84 | const struct nf_loginfo *li, |
b9075fa9 | 85 | const char *fmt, ...); |
f01ffbd6 | 86 | |
4017a7ee PNA |
87 | __printf(8, 9) |
88 | void nf_log_trace(struct net *net, | |
89 | u_int8_t pf, | |
90 | unsigned int hooknum, | |
91 | const struct sk_buff *skb, | |
92 | const struct net_device *in, | |
93 | const struct net_device *out, | |
94 | const struct nf_loginfo *li, | |
95 | const char *fmt, ...); | |
96 | ||
27fd8d90 PNA |
97 | struct nf_log_buf; |
98 | ||
99 | struct nf_log_buf *nf_log_buf_open(void); | |
100 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...); | |
101 | void nf_log_buf_close(struct nf_log_buf *m); | |
102 | ||
83e96d44 PNA |
103 | /* common logging functions */ |
104 | int nf_log_dump_udp_header(struct nf_log_buf *m, const struct sk_buff *skb, | |
105 | u8 proto, int fragment, unsigned int offset); | |
106 | int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb, | |
107 | u8 proto, int fragment, unsigned int offset, | |
108 | unsigned int logflags); | |
109 | void nf_log_dump_sk_uid_gid(struct nf_log_buf *m, struct sock *sk); | |
110 | void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf, | |
111 | unsigned int hooknum, const struct sk_buff *skb, | |
112 | const struct net_device *in, | |
113 | const struct net_device *out, | |
114 | const struct nf_loginfo *loginfo, | |
115 | const char *prefix); | |
673ab46f LZ |
116 | void nf_log_l2packet(struct net *net, u_int8_t pf, |
117 | __be16 protocol, | |
118 | unsigned int hooknum, | |
1fddf4ba PNA |
119 | const struct sk_buff *skb, |
120 | const struct net_device *in, | |
121 | const struct net_device *out, | |
122 | const struct nf_loginfo *loginfo, const char *prefix); | |
83e96d44 | 123 | |
f01ffbd6 | 124 | #endif /* _NF_LOG_H */ |