1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
#ifndef NFTABLES_STATEMENT_H
#define NFTABLES_STATEMENT_H
#include <list.h>
#include <expression.h>
extern struct stmt *expr_stmt_alloc(const struct location *loc,
struct expr *expr);
extern struct stmt *verdict_stmt_alloc(const struct location *loc,
struct expr *expr);
struct counter_stmt {
uint64_t packets;
uint64_t bytes;
};
extern struct stmt *counter_stmt_alloc(const struct location *loc);
#include <meta.h>
struct meta_stmt {
enum nft_meta_keys key;
const struct meta_template *tmpl;
struct expr *expr;
};
extern struct stmt *meta_stmt_alloc(const struct location *loc,
enum nft_meta_keys key,
struct expr *expr);
struct log_stmt {
const char *prefix;
unsigned int snaplen;
uint16_t group;
uint16_t qthreshold;
};
extern struct stmt *log_stmt_alloc(const struct location *loc);
struct limit_stmt {
uint64_t rate;
uint64_t unit;
};
extern struct stmt *limit_stmt_alloc(const struct location *loc);
struct reject_stmt {
enum nft_reject_types type;
};
extern struct stmt *reject_stmt_alloc(const struct location *loc);
struct nat_stmt {
enum nft_nat_types type;
struct expr *addr;
struct expr *proto;
};
extern struct stmt *nat_stmt_alloc(const struct location *loc);
struct queue_stmt {
uint16_t queuenum;
uint16_t queues_total;
uint16_t flags;
};
extern struct stmt *queue_stmt_alloc(const struct location *loc);
#include <ct.h>
struct ct_stmt {
enum nft_ct_keys key;
const struct ct_template *tmpl;
struct expr *expr;
};
extern struct stmt *ct_stmt_alloc(const struct location *loc,
enum nft_ct_keys key,
struct expr *expr);
/**
* enum stmt_types - statement types
*
* @STMT_INVALID: uninitialised
* @STMT_EXPRESSION: expression statement (relational)
* @STMT_VERDICT: verdict statement
* @STMT_COUNTER: counters
* @STMT_META: meta statement
* @STMT_LIMIT: limit statement
* @STMT_LOG: log statement
* @STMT_REJECT: REJECT statement
* @STMT_NAT: NAT statement
* @STMT_QUEUE: QUEUE statement
* @STMT_CT: conntrack statement
*/
enum stmt_types {
STMT_INVALID,
STMT_EXPRESSION,
STMT_VERDICT,
STMT_COUNTER,
STMT_META,
STMT_LIMIT,
STMT_LOG,
STMT_REJECT,
STMT_NAT,
STMT_QUEUE,
STMT_CT,
};
/**
* struct stmt_ops
*
* @type: statement type
* @name: name
* @destroy: destructor
* @print: function to print statement
*/
struct stmt;
struct stmt_ops {
enum stmt_types type;
const char *name;
void (*destroy)(struct stmt *stmt);
void (*print)(const struct stmt *stmt);
};
enum stmt_flags {
STMT_F_TERMINAL = 0x1,
};
/**
* struct stmt
*
* @list: rule list node
* @ops: statement ops
* @location: location where the statement was defined
* @flags: statement flags
* @union: type specific data
*/
struct stmt {
struct list_head list;
const struct stmt_ops *ops;
struct location location;
enum stmt_flags flags;
union {
struct expr *expr;
struct counter_stmt counter;
struct meta_stmt meta;
struct log_stmt log;
struct limit_stmt limit;
struct reject_stmt reject;
struct nat_stmt nat;
struct queue_stmt queue;
struct ct_stmt ct;
};
};
extern struct stmt *stmt_alloc(const struct location *loc,
const struct stmt_ops *ops);
extern void stmt_free(struct stmt *stmt);
extern void stmt_list_free(struct list_head *list);
extern void stmt_print(const struct stmt *stmt);
#endif /* NFTABLES_STATEMENT_H */
|