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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
#ifndef NFTABLES_NETLINK_H
#define NFTABLES_NETLINK_H
#include <libnftnl/table.h>
#include <libnftnl/chain.h>
#include <libnftnl/rule.h>
#include <libnftnl/expr.h>
#include <libnftnl/set.h>
#include <libnftnl/object.h>
#include <linux/netlink.h>
#include <linux/netfilter/nf_tables.h>
#include <rule.h>
struct netlink_parse_ctx {
struct list_head *msgs;
struct table *table;
struct rule *rule;
struct stmt *stmt;
struct expr *registers[1 + NFT_REG32_15 - NFT_REG32_00 + 1];
};
struct rule_pp_ctx {
struct proto_ctx pctx;
struct payload_dep_ctx pdctx;
struct stmt *stmt;
};
extern const struct input_descriptor indesc_netlink;
extern const struct location netlink_location;
/**
* struct netlink_ctx
*
* @msgs: message queue
* @list: list of parsed rules/chains/tables
* @set: current set
* @data: pointer to pass data to callback
* @seqnum: sequence number
* @octx: output context
*/
struct netlink_ctx {
struct mnl_socket *nf_sock;
struct list_head *msgs;
struct list_head list;
struct set *set;
const void *data;
uint32_t seqnum;
struct nftnl_batch *batch;
bool batch_supported;
struct output_ctx *octx;
};
extern struct nftnl_table *alloc_nftnl_table(const struct handle *h);
extern struct nftnl_chain *alloc_nftnl_chain(const struct handle *h);
extern struct nftnl_rule *alloc_nftnl_rule(const struct handle *h);
extern struct nftnl_expr *alloc_nft_expr(const char *name);
extern struct nftnl_set *alloc_nftnl_set(const struct handle *h);
struct nft_data_linearize {
uint32_t len;
uint32_t value[4];
char chain[NFT_CHAIN_MAXNAMELEN];
int verdict;
};
struct nft_data_delinearize {
uint32_t len;
const uint32_t *value;
const char *chain;
int verdict;
};
static inline unsigned int netlink_register_space(unsigned int size)
{
return div_round_up(size, NFT_REG32_SIZE * BITS_PER_BYTE);
}
static inline unsigned int netlink_padded_len(unsigned int size)
{
return netlink_register_space(size) * NFT_REG32_SIZE * BITS_PER_BYTE;
}
static inline unsigned int netlink_padding_len(unsigned int size)
{
return netlink_padded_len(size) - size;
}
extern void netlink_gen_data(const struct expr *expr,
struct nft_data_linearize *data);
extern void netlink_gen_raw_data(const mpz_t value, enum byteorder byteorder,
unsigned int len,
struct nft_data_linearize *data);
extern struct expr *netlink_alloc_value(const struct location *loc,
const struct nft_data_delinearize *nld);
extern struct expr *netlink_alloc_data(const struct location *loc,
const struct nft_data_delinearize *nld,
enum nft_registers dreg);
extern void netlink_linearize_rule(struct netlink_ctx *ctx,
struct nftnl_rule *nlr,
const struct rule *rule);
extern struct rule *netlink_delinearize_rule(struct netlink_ctx *ctx,
struct nftnl_rule *r);
extern int netlink_add_rule(struct netlink_ctx *ctx, const struct handle *h,
const struct rule *rule, uint32_t flags);
extern int netlink_delete_rule(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_rule_list(struct netlink_ctx *ctx, const struct handle *h,
const struct list_head *rule_list);
extern int netlink_add_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct rule *rule, uint32_t flags);
extern int netlink_del_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
extern int netlink_replace_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct rule *rule,
const struct location *loc);
extern int netlink_add_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc,
const struct chain *chain, uint32_t flags);
extern int netlink_rename_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, const char *name);
extern int netlink_delete_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_chains(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_flush_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc,
const struct table *table, uint32_t flags);
extern int netlink_delete_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_tables(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, struct table *table);
extern int netlink_list_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_flush_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_set(struct netlink_ctx *ctx, const struct handle *h,
struct set *set, uint32_t flags);
extern int netlink_delete_set(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_sets(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_set(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern struct stmt *netlink_parse_set_expr(const struct set *set,
const struct nftnl_expr *nle);
extern int netlink_add_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct expr *expr, uint32_t flags);
extern int netlink_delete_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct expr *expr);
extern int netlink_get_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, struct set *set);
extern int netlink_flush_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_objs(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_reset_objs(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, uint32_t type,
bool dump);
extern int netlink_add_obj(struct netlink_ctx *ctx, const struct handle *h,
struct obj *obj, uint32_t flags);
extern int netlink_delete_obj(struct netlink_ctx *ctx, const struct handle *h,
struct location *loc, uint32_t type);
extern void netlink_dump_table(const struct nftnl_table *nlt);
extern void netlink_dump_chain(const struct nftnl_chain *nlc);
extern void netlink_dump_rule(const struct nftnl_rule *nlr);
extern void netlink_dump_expr(const struct nftnl_expr *nle);
extern void netlink_dump_set(const struct nftnl_set *nls);
extern void netlink_dump_obj(struct nftnl_obj *nlo);
extern int netlink_batch_send(struct netlink_ctx *ctx, struct list_head *err_list);
extern void netlink_genid_get(struct mnl_socket *nf_sock);
extern void netlink_restart(struct mnl_socket *nf_sock);
#define netlink_abi_error() \
__netlink_abi_error(__FILE__, __LINE__, strerror(errno));
extern void __noreturn __netlink_abi_error(const char *file, int line, const char *reason);
extern int netlink_io_error(struct netlink_ctx *ctx,
const struct location *loc, const char *fmt, ...);
#define netlink_init_error() \
__netlink_init_error(__FILE__, __LINE__, strerror(errno));
extern void __noreturn __netlink_init_error(const char *file, int line, const char *reason);
extern int netlink_flush_ruleset(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
extern struct nftnl_ruleset *netlink_dump_ruleset(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
struct netlink_mon_handler {
uint32_t monitor_flags;
uint32_t format;
struct netlink_ctx *ctx;
const struct location *loc;
bool cache_needed;
};
extern int netlink_monitor(struct netlink_mon_handler *monhandler,
struct mnl_socket *nf_sock);
bool netlink_batch_supported(struct mnl_socket *nf_sock);
int netlink_echo_callback(const struct nlmsghdr *nlh, void *data);
#endif /* NFTABLES_NETLINK_H */
|
