libnftnl  1.2.5
nft-expr_range-test.c
1 /*
2  * (C) 2013 by Ana Rey Botello <anarey@gmail.com>
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  */
10 
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 
15 #include <netinet/in.h>
16 #include <netinet/ip.h>
17 #include <linux/netfilter/nf_tables.h>
18 #include <libmnl/libmnl.h>
19 #include <libnftnl/rule.h>
20 #include <libnftnl/expr.h>
21 
22 static int test_ok = 1;
23 
24 static void print_err(const char *msg)
25 {
26  test_ok = 0;
27  printf("\033[31mERROR:\e[0m %s\n", msg);
28 }
29 
30 static void range_nftnl_expr(struct nftnl_expr *rule_a,
31  struct nftnl_expr *rule_b)
32 {
33  uint32_t data_a, data_b;
34 
35  nftnl_expr_get(rule_a, NFTNL_EXPR_RANGE_FROM_DATA, &data_a);
36  nftnl_expr_get(rule_b, NFTNL_EXPR_RANGE_FROM_DATA, &data_b);
37  if (data_a != data_b)
38  print_err("Size of NFTNL_EXPR_RANGE_FROM_DATA mismatches");
39  nftnl_expr_get(rule_a, NFTNL_EXPR_RANGE_TO_DATA, &data_a);
40  nftnl_expr_get(rule_b, NFTNL_EXPR_RANGE_TO_DATA, &data_b);
41  if (data_a != data_b)
42  print_err("Size of NFTNL_EXPR_RANGE_TO_DATA mismatches");
43  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_RANGE_SREG) !=
44  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_RANGE_SREG))
45  print_err("Expr NFTNL_EXPR_RANGE_SREG mismatches");
46  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_RANGE_OP) !=
47  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_RANGE_OP))
48  print_err("Expr NFTNL_EXPR_RANGE_OP mismatches");
49 }
50 
51 int main(int argc, char *argv[])
52 {
53  struct nftnl_rule *a, *b;
54  struct nftnl_expr *ex;
55  struct nlmsghdr *nlh;
56  char buf[4096];
57  struct nftnl_expr_iter *iter_a, *iter_b;
58  struct nftnl_expr *rule_a, *rule_b;
59  uint32_t data_a = 0x01010101, data_b = 0x02020202;
60 
61  a = nftnl_rule_alloc();
62  b = nftnl_rule_alloc();
63  if (a == NULL || b == NULL)
64  print_err("OOM");
65  ex = nftnl_expr_alloc("range");
66  if (ex == NULL)
67  print_err("OOM");
68 
69  nftnl_expr_set(ex, NFTNL_EXPR_RANGE_FROM_DATA,
70  &data_a, sizeof(data_a));
71  nftnl_expr_set(ex, NFTNL_EXPR_RANGE_TO_DATA,
72  &data_b, sizeof(data_b));
73  nftnl_expr_set_u32(ex, NFTNL_EXPR_RANGE_SREG, 0x12345678);
74  nftnl_expr_set_u32(ex, NFTNL_EXPR_RANGE_OP, 0x78123456);
75 
76  nftnl_rule_add_expr(a, ex);
77 
78  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
79  nftnl_rule_nlmsg_build_payload(nlh, a);
80 
81  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
82  print_err("parsing problems");
83 
84  iter_a = nftnl_expr_iter_create(a);
85  iter_b = nftnl_expr_iter_create(b);
86  if (iter_a == NULL || iter_b == NULL)
87  print_err("OOM");
88  rule_a = nftnl_expr_iter_next(iter_a);
89  rule_b = nftnl_expr_iter_next(iter_b);
90  if (rule_a == NULL || rule_b == NULL)
91  print_err("OOM");
92 
93  range_nftnl_expr(rule_a, rule_b);
94 
95  if (nftnl_expr_iter_next(iter_a) != NULL ||
96  nftnl_expr_iter_next(iter_b) != NULL)
97  print_err("More 1 expr.");
98 
99  nftnl_expr_iter_destroy(iter_a);
100  nftnl_expr_iter_destroy(iter_b);
101  nftnl_rule_free(a);
102  nftnl_rule_free(b);
103 
104  if (!test_ok)
105  exit(EXIT_FAILURE);
106 
107  printf("%s: \033[32mOK\e[0m\n", argv[0]);
108  return EXIT_SUCCESS;
109 }