libnftnl  1.2.9
nft-expr_target-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 <netinet/in.h>
11 #include <netinet/ip.h>
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 
19 static void print_err(const char *msg)
20 {
21  test_ok = 0;
22  printf("\033[31mERROR:\e[0m %s\n", msg);
23 }
24 
25 static void print_err2(const char *msg, uint32_t a, uint32_t b)
26 {
27  test_ok = 0;
28  printf("\033[31mERROR:\e[0m %s size a: %d b: %d \n",msg, a, b);
29 }
30 
31 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
32  struct nftnl_expr *rule_b)
33 {
34  uint32_t lena, lenb;
35 
36  if (strcmp(nftnl_expr_get_str(rule_a, NFTNL_EXPR_TG_NAME),
37  nftnl_expr_get_str(rule_b, NFTNL_EXPR_TG_NAME)) != 0)
38  print_err("Expr NFTNL_EXPR_TG_NAME mismatches");
39  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_TG_REV) !=
40  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_TG_REV))
41  print_err("Expr NFTNL_EXPR_TG_REV mismatches");
42  nftnl_expr_get(rule_a, NFTNL_EXPR_TG_INFO, &lena);
43  nftnl_expr_get(rule_b, NFTNL_EXPR_TG_INFO, &lenb);
44  if (lena != lenb)
45  print_err2("Expr NFTNL_EXPR_TG_INFO size mismatches", lena, lenb);
46 }
47 
48 int main(int argc, char *argv[])
49 {
50  struct nftnl_rule *a, *b;
51  struct nftnl_expr *ex;
52  struct nlmsghdr *nlh;
53  char buf[4096];
54  struct nftnl_expr_iter *iter_a, *iter_b;
55  struct nftnl_expr *rule_a, *rule_b;
56  char data[] = "0123456789abcdef";
57 
58  a = nftnl_rule_alloc();
59  b = nftnl_rule_alloc();
60  if (a == NULL || b == NULL)
61  print_err("OOM");
62 
63  ex = nftnl_expr_alloc("target");
64  if (ex == NULL)
65  print_err("OOM");
66 
67  nftnl_expr_set(ex, NFTNL_EXPR_TG_NAME, "test", strlen("test"));
68  nftnl_expr_set_u32(ex, NFTNL_EXPR_TG_REV, 0x56781234);
69  nftnl_expr_set(ex, NFTNL_EXPR_TG_INFO, strdup(data), sizeof(data));
70  nftnl_rule_add_expr(a, ex);
71 
72  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
73  nftnl_rule_nlmsg_build_payload(nlh, a);
74 
75  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
76  print_err("parsing problems");
77 
78  iter_a = nftnl_expr_iter_create(a);
79  iter_b = nftnl_expr_iter_create(b);
80  if (iter_a == NULL || iter_b == NULL)
81  print_err("OOM");
82 
83  rule_a = nftnl_expr_iter_next(iter_a);
84  rule_b = nftnl_expr_iter_next(iter_b);
85  if (rule_a == NULL || rule_b == NULL)
86  print_err("OOM");
87 
88  cmp_nftnl_expr(rule_a, rule_b);
89 
90  if (nftnl_expr_iter_next(iter_a) != NULL ||
91  nftnl_expr_iter_next(iter_b) != NULL)
92  print_err("More 1 expr.");
93 
94  nftnl_expr_iter_destroy(iter_a);
95  nftnl_expr_iter_destroy(iter_b);
96  nftnl_rule_free(a);
97  nftnl_rule_free(b);
98 
99  if (!test_ok)
100  exit(EXIT_FAILURE);
101  printf("%s: \033[32mOK\e[0m\n", argv[0]);
102  return EXIT_SUCCESS;
103 }