summaryrefslogtreecommitdiffstats
path: root/src/statement.c
blob: 3fdd9e2de0a8b7115a893381cc7b19c2e027a7e4 (plain)
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
/*
 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Development of this code funded by Astaro AG (http://www.astaro.com/)
 */

#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>

#include <statement.h>
#include <utils.h>
#include <list.h>

struct stmt *stmt_alloc(const struct location *loc,
			const struct stmt_ops *ops)
{
	struct stmt *stmt;

	stmt = xzalloc(sizeof(*stmt));
	init_list_head(&stmt->list);
	stmt->location = *loc;
	stmt->ops      = ops;
	return stmt;
}

void stmt_free(struct stmt *stmt)
{
	if (stmt->ops->destroy)
		stmt->ops->destroy(stmt);
	xfree(stmt);
}

void stmt_list_free(struct list_head *list)
{
	struct stmt *i, *next;

	list_for_each_entry_safe(i, next, list, list) {
		list_del(&i->list);
		stmt_free(i);
	}
}

void stmt_print(const struct stmt *stmt)
{
	stmt->ops->print(stmt);
}

static void expr_stmt_print(const struct stmt *stmt)
{
	expr_print(stmt->expr);
}

static void expr_stmt_destroy(struct stmt *stmt)
{
	expr_free(stmt->expr);
}

static const struct stmt_ops expr_stmt_ops = {
	.type		= STMT_EXPRESSION,
	.name		= "expression",
	.print		= expr_stmt_print,
	.destroy	= expr_stmt_destroy,
};

struct stmt *expr_stmt_alloc(const struct location *loc, struct expr *expr)
{
	struct stmt *stmt;

	stmt = stmt_alloc(loc, &expr_stmt_ops);
	stmt->expr = expr;
	return stmt;
}

static const struct stmt_ops verdict_stmt_ops = {
	.type		= STMT_VERDICT,
	.name		= "verdict",
	.print		= expr_stmt_print,
	.destroy	= expr_stmt_destroy,
};

struct stmt *verdict_stmt_alloc(const struct location *loc, struct expr *expr)
{
	struct stmt *stmt;

	stmt = stmt_alloc(loc, &verdict_stmt_ops);
	stmt->expr = expr;
	return stmt;
}

static void counter_stmt_print(const struct stmt *stmt)
{
	printf("counter packets %" PRIu64 " bytes %" PRIu64,
	       stmt->counter.packets, stmt->counter.bytes);
}

static const struct stmt_ops counter_stmt_ops = {
	.type		= STMT_COUNTER,
	.name		= "counter",
	.print		= counter_stmt_print,
};

struct stmt *counter_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &counter_stmt_ops);
}

static void log_stmt_print(const struct stmt *stmt)
{
	printf("log");
	if (stmt->log.prefix != NULL)
		printf(" prefix \"%s\"", stmt->log.prefix);
	if (stmt->log.group)
		printf(" group %u", stmt->log.group);
	if (stmt->log.snaplen)
		printf(" snaplen %u", stmt->log.snaplen);
	if (stmt->log.qthreshold)
		printf(" queue-threshold %u", stmt->log.qthreshold);
}

static void log_stmt_destroy(struct stmt *stmt)
{
	xfree(stmt->log.prefix);
}

static const struct stmt_ops log_stmt_ops = {
	.type		= STMT_LOG,
	.name		= "log",
	.print		= log_stmt_print,
	.destroy	= log_stmt_destroy,
};

struct stmt *log_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &log_stmt_ops);
}

static const char *get_unit(uint64_t u)
{
	switch (u) {
	case 1: return "second";
	case 60: return "minute";
	case 60 * 60: return "hour";
	case 60 * 60 * 24: return "day";
	case 60 * 60 * 24 * 7: return "week";
	}

	return "error";
}

static void limit_stmt_print(const struct stmt *stmt)
{
	printf("limit rate %" PRIu64 "/%s",
	       stmt->limit.rate, get_unit(stmt->limit.unit));
}

static const struct stmt_ops limit_stmt_ops = {
	.type		= STMT_LIMIT,
	.name		= "limit",
	.print		= limit_stmt_print,
};

struct stmt *limit_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &limit_stmt_ops);
}

static void queue_stmt_print(const struct stmt *stmt)
{
	int one = 0;

	printf("queue num %u total %u",
		stmt->queue.queuenum, stmt->queue.queues_total);
	if (stmt->queue.flags)
		printf(" options ");
	if (stmt->queue.flags & NFT_QUEUE_FLAG_BYPASS) {
		printf("bypass");
		one = 1;
	}
	if (stmt->queue.flags & NFT_QUEUE_FLAG_CPU_FANOUT) {
		if (one)
			printf (",");
		printf("fanout");
	}

}

static const struct stmt_ops queue_stmt_ops = {
	.type		= STMT_QUEUE,
	.name		= "queue",
	.print		= queue_stmt_print,
};

struct stmt *queue_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &queue_stmt_ops);
}

static void reject_stmt_print(const struct stmt *stmt)
{
	printf("reject");
}

static const struct stmt_ops reject_stmt_ops = {
	.type		= STMT_REJECT,
	.name		= "reject",
	.print		= reject_stmt_print,
};

struct stmt *reject_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &reject_stmt_ops);
}

static void nat_stmt_print(const struct stmt *stmt)
{
	static const char *nat_types[] = {
		[NFT_NAT_SNAT]	= "snat",
		[NFT_NAT_DNAT]	= "dnat",
	};

	printf("%s ", nat_types[stmt->nat.type]);
	if (stmt->nat.addr)
		expr_print(stmt->nat.addr);
	if (stmt->nat.proto) {
		printf(":");
		expr_print(stmt->nat.proto);
	}
}

static void nat_stmt_destroy(struct stmt *stmt)
{
	expr_free(stmt->nat.addr);
	expr_free(stmt->nat.proto);
}

static const struct stmt_ops nat_stmt_ops = {
	.type		= STMT_NAT,
	.name		= "nat",
	.print		= nat_stmt_print,
	.destroy	= nat_stmt_destroy,
};

struct stmt *nat_stmt_alloc(const struct location *loc)
{
	return stmt_alloc(loc, &nat_stmt_ops);
}