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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
#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 <libnftnl/flowtable.h>
#include <linux/netlink.h>
#include <linux/netfilter/nf_tables.h>
#include <rule.h>
#define MAX_REGS (1 + NFT_REG32_15 - NFT_REG32_00)
#ifndef NETLINK_EXT_ACK
#define NETLINK_EXT_ACK 11
enum nlmsgerr_attrs {
NLMSGERR_ATTR_UNUSED,
NLMSGERR_ATTR_MSG,
NLMSGERR_ATTR_OFFS,
NLMSGERR_ATTR_COOKIE,
__NLMSGERR_ATTR_MAX,
NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1
};
#define NLM_F_CAPPED 0x100 /* request was capped */
#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
#endif
struct netlink_parse_ctx {
struct list_head *msgs;
struct table *table;
struct rule *rule;
struct stmt *stmt;
struct expr *registers[MAX_REGS + 1];
unsigned int debug_mask;
struct netlink_ctx *nlctx;
bool inner;
uint8_t inner_reg;
};
#define RULE_PP_IN_CONCATENATION (1 << 0)
#define RULE_PP_IN_SET_ELEM (1 << 1)
#define RULE_PP_REMOVE_OP_AND (RULE_PP_IN_CONCATENATION | \
RULE_PP_IN_SET_ELEM)
struct dl_proto_ctx {
struct proto_ctx pctx;
struct payload_dep_ctx pdctx;
};
struct rule_pp_ctx {
struct dl_proto_ctx _dl[2];
struct dl_proto_ctx *dl;
struct stmt *stmt;
unsigned int flags;
};
extern const struct input_descriptor indesc_netlink;
extern const struct location netlink_location;
/**
* struct netlink_ctx
*
* @nft: nftables context
* @msgs: message queue
* @list: list of parsed rules/chains/tables
* @set: current set
* @data: pointer to pass data to callback
* @seqnum: sequence number
*/
struct netlink_ctx {
struct nft_ctx *nft;
struct list_head *msgs;
struct list_head list;
struct set *set;
const void *data;
uint32_t seqnum;
struct nftnl_batch *batch;
int maybe_emsgsize;
};
extern struct nftnl_expr *alloc_nft_expr(const char *name);
extern void alloc_setelem_cache(const struct expr *set, struct nftnl_set *nls);
struct nftnl_set_elem *alloc_nftnl_setelem(const struct expr *set,
const struct expr *expr);
extern struct nftnl_table *netlink_table_alloc(const struct nlmsghdr *nlh);
extern struct nftnl_chain *netlink_chain_alloc(const struct nlmsghdr *nlh);
extern struct nftnl_set *netlink_set_alloc(const struct nlmsghdr *nlh);
extern struct nftnl_obj *netlink_obj_alloc(const struct nlmsghdr *nlh);
extern struct nftnl_rule *netlink_rule_alloc(const struct nlmsghdr *nlh);
struct nft_data_linearize {
uint32_t len;
uint32_t value[4];
char chain[NFT_CHAIN_MAXNAMELEN];
uint32_t chain_id;
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 nftnl_expr *netlink_gen_stmt_stateful(const struct stmt *stmt);
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);
struct netlink_linearize_ctx;
extern void netlink_linearize_rule(struct netlink_ctx *ctx,
const struct rule *rule,
struct netlink_linearize_ctx *lctx);
extern struct rule *netlink_delinearize_rule(struct netlink_ctx *ctx,
struct nftnl_rule *r);
extern int netlink_list_chains(struct netlink_ctx *ctx, const struct handle *h);
extern struct chain *netlink_delinearize_chain(struct netlink_ctx *ctx,
const struct nftnl_chain *nlc);
extern int netlink_list_tables(struct netlink_ctx *ctx, const struct handle *h,
const struct nft_cache_filter *filter);
extern struct table *netlink_delinearize_table(struct netlink_ctx *ctx,
const struct nftnl_table *nlt);
extern struct set *netlink_delinearize_set(struct netlink_ctx *ctx,
const struct nftnl_set *nls);
extern struct stmt *netlink_parse_set_expr(const struct set *set,
const struct nft_cache *cache,
const struct nftnl_expr *nle);
extern int netlink_list_setelems(struct netlink_ctx *ctx,
const struct handle *h, struct set *set,
bool reset);
extern int netlink_get_setelem(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, struct set *cache_set,
struct set *set, struct expr *init, bool reset);
extern int netlink_delinearize_setelem(struct nftnl_set_elem *nlse,
struct set *set,
struct nft_cache *cache);
extern int netlink_list_objs(struct netlink_ctx *ctx, const struct handle *h);
extern int netlink_reset_objs(struct netlink_ctx *ctx, const struct cmd *cmd,
uint32_t type, bool dump);
extern struct obj *netlink_delinearize_obj(struct netlink_ctx *ctx,
struct nftnl_obj *nlo);
extern int netlink_list_flowtables(struct netlink_ctx *ctx,
const struct handle *h);
extern struct flowtable *netlink_delinearize_flowtable(struct netlink_ctx *ctx,
struct nftnl_flowtable *nlo);
extern int netlink_reset_rules(struct netlink_ctx *ctx, const struct cmd *cmd,
bool dump);
extern void netlink_dump_chain(const struct nftnl_chain *nlc,
struct netlink_ctx *ctx);
extern void netlink_dump_rule(const struct nftnl_rule *nlr,
struct netlink_ctx *ctx);
extern void netlink_dump_expr(const struct nftnl_expr *nle,
FILE *fp, unsigned int debug_mask);
extern void netlink_dump_set(const struct nftnl_set *nls,
struct netlink_ctx *ctx);
extern void netlink_dump_obj(struct nftnl_obj *nlo, struct netlink_ctx *ctx);
extern void netlink_dump_flowtable(struct nftnl_flowtable *flo, struct netlink_ctx *ctx);
#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, ...) __attribute__((format(printf, 3, 4)));
#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);
struct netlink_mon_handler {
uint32_t monitor_flags;
uint32_t format;
struct netlink_ctx *ctx;
const struct location *loc;
unsigned int debug_mask;
struct nft_cache *cache;
};
extern int netlink_monitor(struct netlink_mon_handler *monhandler,
struct mnl_socket *nf_sock);
struct netlink_cb_data {
struct netlink_ctx *nl_ctx;
struct list_head *err_list;
};
int netlink_echo_callback(const struct nlmsghdr *nlh, void *data);
struct ruleset_parse {
struct netlink_ctx *nl_ctx;
struct cmd *cmd;
};
struct nftnl_parse_ctx;
int netlink_events_trace_cb(const struct nlmsghdr *nlh, int type,
struct netlink_mon_handler *monh);
enum nft_data_types dtype_map_to_kernel(const struct datatype *dtype);
void netlink_linearize_init(struct netlink_linearize_ctx *lctx,
struct nftnl_rule *nlr);
void netlink_linearize_fini(struct netlink_linearize_ctx *lctx);
struct netlink_linearize_ctx {
struct nftnl_rule *nlr;
unsigned int reg_low;
struct list_head *expr_loc_htable;
};
#define NFT_EXPR_LOC_HSIZE 128
struct nft_expr_loc {
struct list_head hlist;
const struct nftnl_expr *nle;
const struct location *loc;
};
struct nft_expr_loc *nft_expr_loc_find(const struct nftnl_expr *nle,
struct netlink_linearize_ctx *ctx);
struct dl_proto_ctx *dl_proto_ctx(struct rule_pp_ctx *ctx);
#endif /* NFTABLES_NETLINK_H */
|
