libnftnl  1.2.9
nft-expr_dup-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 #include <netinet/in.h>
10 #include <netinet/ip.h>
11 
12 #include <linux/netfilter/nf_tables.h>
13 #include <libmnl/libmnl.h>
14 #include <libnftnl/rule.h>
15 #include <libnftnl/expr.h>
16 
17 static int test_ok = 1;
18 static void print_err(const char *msg)
19 {
20  test_ok = 0;
21  printf("\033[31mERROR:\e[0m %s\n", msg);
22 }
23 
24 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
25  struct nftnl_expr *rule_b)
26 {
27  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_DUP_SREG_ADDR) !=
28  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_DUP_SREG_ADDR))
29  print_err("Expr SREG_TO mismatches");
30  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_DUP_SREG_DEV) !=
31  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_DUP_SREG_DEV))
32  print_err("Expr SREG_OIF mismatches");
33 }
34 
35 int main(int argc, char *argv[])
36 {
37  struct nftnl_rule *a, *b;
38  struct nftnl_expr *ex;
39  struct nlmsghdr *nlh;
40  char buf[4096];
41  struct nftnl_expr_iter *iter_a, *iter_b;
42  struct nftnl_expr *rule_a, *rule_b;
43 
44  a = nftnl_rule_alloc();
45  b = nftnl_rule_alloc();
46  if (a == NULL || b == NULL)
47  print_err("OOM");
48  ex = nftnl_expr_alloc("dup");
49  if (ex == NULL)
50  print_err("OOM");
51 
52  nftnl_expr_set_u32(ex, NFTNL_EXPR_DUP_SREG_ADDR, 0x12345678);
53  nftnl_expr_set_u32(ex, NFTNL_EXPR_DUP_SREG_DEV, 0x78123456);
54 
55  nftnl_rule_add_expr(a, ex);
56 
57  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
58  nftnl_rule_nlmsg_build_payload(nlh, a);
59 
60  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
61  print_err("parsing problems");
62 
63  iter_a = nftnl_expr_iter_create(a);
64  iter_b = nftnl_expr_iter_create(b);
65  if (iter_a == NULL || iter_b == NULL)
66  print_err("OOM");
67 
68  rule_a = nftnl_expr_iter_next(iter_a);
69  rule_b = nftnl_expr_iter_next(iter_b);
70  if (rule_a == NULL || rule_b == NULL)
71  print_err("OOM");
72 
73  cmp_nftnl_expr(rule_a, rule_b);
74 
75  if (nftnl_expr_iter_next(iter_a) != NULL ||
76  nftnl_expr_iter_next(iter_b) != NULL)
77  print_err("More 1 expr.");
78 
79  nftnl_expr_iter_destroy(iter_a);
80  nftnl_expr_iter_destroy(iter_b);
81  nftnl_rule_free(a);
82  nftnl_rule_free(b);
83 
84  if (!test_ok)
85  exit(EXIT_FAILURE);
86 
87  printf("%s: \033[32mOK\e[0m\n", argv[0]);
88  return EXIT_SUCCESS;
89 }