libnftnl  1.2.9
nft-expr_masq-test.c
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * (C) 2013 by Ana Rey Botello <anarey@gmail.com>
4  */
5 
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 
10 #include <linux/netfilter/nf_tables.h>
11 #include <libmnl/libmnl.h>
12 #include <libnftnl/rule.h>
13 #include <libnftnl/expr.h>
14 
15 static int test_ok = 1;
16 
17 static void print_err(const char *msg)
18 {
19  test_ok = 0;
20  printf("\033[31mERROR:\e[0m %s\n", msg);
21 }
22 
23 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
24  struct nftnl_expr *rule_b)
25 {
26  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_MASQ_FLAGS) !=
27  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_MASQ_FLAGS))
28  print_err("Expr NFTNL_EXPR_MASQ_FLAGS mismatches");
29  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_MASQ_REG_PROTO_MIN) !=
30  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_MASQ_REG_PROTO_MIN))
31  print_err("Expr NFTNL_EXPR_MASQ_REG_PROTO_MIN mismatches");
32  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_MASQ_REG_PROTO_MAX) !=
33  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_MASQ_REG_PROTO_MAX))
34  print_err("Expr NFTNL_EXPR_MASQ_REG_PROTO_MAX mismatches");
35 }
36 
37 int main(int argc, char *argv[])
38 {
39  struct nftnl_rule *a, *b;
40  struct nftnl_expr *ex;
41  struct nlmsghdr *nlh;
42  char buf[4096];
43  struct nftnl_expr_iter *iter_a, *iter_b;
44  struct nftnl_expr *rule_a, *rule_b;
45 
46  a = nftnl_rule_alloc();
47  b = nftnl_rule_alloc();
48  if (a == NULL || b == NULL)
49  print_err("OOM");
50  ex = nftnl_expr_alloc("masq");
51  if (ex == NULL)
52  print_err("OOM");
53 
54  nftnl_expr_set_u32(ex, NFTNL_EXPR_MASQ_FLAGS, 0x1234568);
55  nftnl_expr_set_u32(ex, NFTNL_EXPR_MASQ_REG_PROTO_MIN, 0x5432178);
56  nftnl_expr_set_u32(ex, NFTNL_EXPR_MASQ_REG_PROTO_MAX, 0x8765421);
57 
58  nftnl_rule_add_expr(a, ex);
59 
60  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
61  nftnl_rule_nlmsg_build_payload(nlh, a);
62 
63  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
64  print_err("parsing problems");
65 
66  iter_a = nftnl_expr_iter_create(a);
67  iter_b = nftnl_expr_iter_create(b);
68  if (iter_a == NULL || iter_b == NULL)
69  print_err("OOM");
70 
71  rule_a = nftnl_expr_iter_next(iter_a);
72  rule_b = nftnl_expr_iter_next(iter_b);
73  if (rule_a == NULL || rule_b == NULL)
74  print_err("OOM");
75 
76  cmp_nftnl_expr(rule_a, rule_b);
77 
78  if (nftnl_expr_iter_next(iter_a) != NULL ||
79  nftnl_expr_iter_next(iter_b) != NULL)
80  print_err("More 1 expr.");
81 
82  nftnl_expr_iter_destroy(iter_a);
83  nftnl_expr_iter_destroy(iter_b);
84  nftnl_rule_free(a);
85  nftnl_rule_free(b);
86 
87  if (!test_ok)
88  exit(EXIT_FAILURE);
89 
90  printf("%s: \033[32mOK\e[0m\n", argv[0]);
91  return EXIT_SUCCESS;
92 }