libnftnl  1.2.9
nft-expr_match-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 <arpa/inet.h>
11 #include <netinet/in.h>
12 #include <netinet/ip.h>
13 #include <linux/netfilter/nf_tables.h>
14 #include <libmnl/libmnl.h>
15 #include <libnftnl/rule.h>
16 #include <libnftnl/expr.h>
17 
18 static int test_ok = 1;
19 
20 static void print_err(const char *msg)
21 {
22  test_ok = 0;
23  printf("\033[31mERROR:\e[0m %s\n", msg);
24 }
25 
26 static void print_err2(const char *msg, uint32_t a, uint32_t b)
27 {
28  test_ok = 0;
29  printf("\033[31mERROR:\e[0m %s size a: %d b: %d \n", msg, a, b);
30 }
31 
32 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
33  struct nftnl_expr *rule_b)
34 {
35  uint32_t lena, lenb;
36 
37  if (strcmp(nftnl_expr_get_str(rule_a, NFTNL_EXPR_MT_NAME),
38  nftnl_expr_get_str(rule_b, NFTNL_EXPR_MT_NAME)) != 0)
39  print_err("Expr NFTNL_EXPR_MT_NAME mismatches");
40  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_MT_REV) !=
41  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_MT_REV))
42  print_err("Expr NFTNL_EXPR_MT_REV mismatches");
43  nftnl_expr_get(rule_a, NFTNL_EXPR_MT_INFO, &lena);
44  nftnl_expr_get(rule_b, NFTNL_EXPR_MT_INFO, &lenb);
45  if (lena != lenb)
46  print_err2("Expr NFTNL_EXPR_MT_INFO size mismatches", lena, lenb);
47 }
48 
49 int main(int argc, char *argv[])
50 {
51  struct nftnl_rule *a, *b;
52  struct nftnl_expr *ex;
53  struct nlmsghdr *nlh;
54  char buf[4096];
55  struct nftnl_expr_iter *iter_a, *iter_b;
56  struct nftnl_expr *rule_a, *rule_b;
57  char data[] = "0123456789abcdef";
58 
59  a = nftnl_rule_alloc();
60  b = nftnl_rule_alloc();
61  if (a == NULL || b == NULL)
62  print_err("OOM");
63  ex = nftnl_expr_alloc("match");
64  if (ex == NULL)
65  print_err("OOM");
66 
67  nftnl_expr_set_str(ex, NFTNL_EXPR_MT_NAME, "Tests");
68  nftnl_expr_set_u32(ex, NFTNL_EXPR_MT_REV, 0x12345678);
69  nftnl_expr_set(ex, NFTNL_EXPR_MT_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  iter_a = nftnl_expr_iter_create(a);
78  iter_b = nftnl_expr_iter_create(b);
79  if (iter_a == NULL || iter_b == NULL)
80  print_err("OOM");
81 
82  rule_a = nftnl_expr_iter_next(iter_a);
83  rule_b = nftnl_expr_iter_next(iter_b);
84  if (rule_a == NULL || rule_b == NULL)
85  print_err("OOM");
86 
87  cmp_nftnl_expr(rule_a, rule_b);
88 
89  if (nftnl_expr_iter_next(iter_a) != NULL ||
90  nftnl_expr_iter_next(iter_b) != NULL)
91  print_err("More 1 expr.");
92 
93  nftnl_expr_iter_destroy(iter_a);
94  nftnl_expr_iter_destroy(iter_b);
95  nftnl_rule_free(a);
96  nftnl_rule_free(b);
97 
98  if (!test_ok)
99  exit(EXIT_FAILURE);
100 
101  printf("%s: \033[32mOK\e[0m\n", argv[0]);
102  return EXIT_SUCCESS;
103 }