libnftnl  1.2.2
nft-expr_redir-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 <linux/netfilter/nf_tables.h>
16 #include <libmnl/libmnl.h>
17 #include <libnftnl/rule.h>
18 #include <libnftnl/expr.h>
19 
20 static int test_ok = 1;
21 
22 static void print_err(const char *msg)
23 {
24  test_ok = 0;
25  printf("\033[31mERROR:\e[0m %s\n", msg);
26 }
27 
28 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
29  struct nftnl_expr *rule_b)
30 {
31  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_REDIR_REG_PROTO_MIN) !=
32  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_REDIR_REG_PROTO_MIN))
33  print_err("Expr NFTNL_EXPR_REDIR_REG_PROTO_MIN mismatches");
34  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_REDIR_REG_PROTO_MAX) !=
35  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_REDIR_REG_PROTO_MAX))
36  print_err("Expr NFTNL_EXPR_REDIR_REG_PROTO_MAX mismatches");
37  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_REDIR_FLAGS) !=
38  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_REDIR_FLAGS))
39  print_err("Expr NFTNL_EXPR_REDIR_FLAGS mismatches");
40 }
41 
42 int main(int argc, char *argv[])
43 {
44  struct nftnl_rule *a, *b;
45  struct nftnl_expr *ex;
46  struct nlmsghdr *nlh;
47  char buf[4096];
48  struct nftnl_expr_iter *iter_a, *iter_b;
49  struct nftnl_expr *rule_a, *rule_b;
50 
51  a = nftnl_rule_alloc();
52  b = nftnl_rule_alloc();
53  if (a == NULL || b == NULL)
54  print_err("OOM");
55  ex = nftnl_expr_alloc("redir");
56  if (ex == NULL)
57  print_err("OOM");
58 
59  nftnl_expr_set_u32(ex, NFTNL_EXPR_REDIR_REG_PROTO_MIN, 0x12345678);
60  nftnl_expr_set_u32(ex, NFTNL_EXPR_REDIR_REG_PROTO_MAX, 0x56781234);
61  nftnl_expr_set_u32(ex, NFTNL_EXPR_REDIR_FLAGS, 0x12003400);
62 
63  nftnl_rule_add_expr(a, ex);
64 
65  nlh = nftnl_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
66  nftnl_rule_nlmsg_build_payload(nlh, a);
67 
68  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
69  print_err("Parsing problems");
70 
71  iter_a = nftnl_expr_iter_create(a);
72  iter_b = nftnl_expr_iter_create(b);
73  if (iter_a == NULL || iter_b == NULL)
74  print_err("OOM");
75 
76  rule_a = nftnl_expr_iter_next(iter_a);
77  rule_b = nftnl_expr_iter_next(iter_b);
78  if (rule_a == NULL || rule_b == NULL)
79  print_err("OOM");
80 
81  cmp_nftnl_expr(rule_a, rule_b);
82 
83  if (nftnl_expr_iter_next(iter_a) != NULL ||
84  nftnl_expr_iter_next(iter_b) != NULL)
85  print_err("More than 1 expr.");
86 
87  nftnl_expr_iter_destroy(iter_a);
88  nftnl_expr_iter_destroy(iter_b);
89  nftnl_rule_free(a);
90  nftnl_rule_free(b);
91 
92  if (!test_ok)
93  exit(EXIT_FAILURE);
94 
95  printf("%s: \033[32mOK\e[0m\n", argv[0]);
96  return EXIT_SUCCESS;
97 }