libnftnl  1.1.8
nft-expr_match-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 <arpa/inet.h>
16 #include <netinet/in.h>
17 #include <netinet/ip.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <libmnl/libmnl.h>
20 #include <libnftnl/rule.h>
21 #include <libnftnl/expr.h>
22 
23 static int test_ok = 1;
24 
25 static void print_err(const char *msg)
26 {
27  test_ok = 0;
28  printf("\033[31mERROR:\e[0m %s\n", msg);
29 }
30 
31 static void print_err2(const char *msg, uint32_t a, uint32_t b)
32 {
33  test_ok = 0;
34  printf("\033[31mERROR:\e[0m %s size a: %d b: %d \n", msg, a, b);
35 }
36 
37 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
38  struct nftnl_expr *rule_b)
39 {
40  uint32_t lena, lenb;
41 
42  if (strcmp(nftnl_expr_get_str(rule_a, NFTNL_EXPR_MT_NAME),
43  nftnl_expr_get_str(rule_b, NFTNL_EXPR_MT_NAME)) != 0)
44  print_err("Expr NFTNL_EXPR_MT_NAME mismatches");
45  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_MT_REV) !=
46  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_MT_REV))
47  print_err("Expr NFTNL_EXPR_MT_REV mismatches");
48  nftnl_expr_get(rule_a, NFTNL_EXPR_MT_INFO, &lena);
49  nftnl_expr_get(rule_b, NFTNL_EXPR_MT_INFO, &lenb);
50  if (lena != lenb)
51  print_err2("Expr NFTNL_EXPR_MT_INFO size mismatches", lena, lenb);
52 }
53 
54 int main(int argc, char *argv[])
55 {
56  struct nftnl_rule *a, *b;
57  struct nftnl_expr *ex;
58  struct nlmsghdr *nlh;
59  char buf[4096];
60  struct nftnl_expr_iter *iter_a, *iter_b;
61  struct nftnl_expr *rule_a, *rule_b;
62  char data[16] = "0123456789abcdef";
63 
64  a = nftnl_rule_alloc();
65  b = nftnl_rule_alloc();
66  if (a == NULL || b == NULL)
67  print_err("OOM");
68  ex = nftnl_expr_alloc("match");
69  if (ex == NULL)
70  print_err("OOM");
71 
72  nftnl_expr_set_str(ex, NFTNL_EXPR_MT_NAME, "Tests");
73  nftnl_expr_set_u32(ex, NFTNL_EXPR_MT_REV, 0x12345678);
74  nftnl_expr_set(ex, NFTNL_EXPR_MT_INFO, strdup(data), sizeof(data));
75  nftnl_rule_add_expr(a, ex);
76 
77  nlh = nftnl_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
78  nftnl_rule_nlmsg_build_payload(nlh, a);
79 
80  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
81  print_err("parsing problems");
82  iter_a = nftnl_expr_iter_create(a);
83  iter_b = nftnl_expr_iter_create(b);
84  if (iter_a == NULL || iter_b == NULL)
85  print_err("OOM");
86 
87  rule_a = nftnl_expr_iter_next(iter_a);
88  rule_b = nftnl_expr_iter_next(iter_b);
89  if (rule_a == NULL || rule_b == NULL)
90  print_err("OOM");
91 
92  cmp_nftnl_expr(rule_a, rule_b);
93 
94  if (nftnl_expr_iter_next(iter_a) != NULL ||
95  nftnl_expr_iter_next(iter_b) != NULL)
96  print_err("More 1 expr.");
97 
98  nftnl_expr_iter_destroy(iter_a);
99  nftnl_expr_iter_destroy(iter_b);
100  nftnl_rule_free(a);
101  nftnl_rule_free(b);
102 
103  if (!test_ok)
104  exit(EXIT_FAILURE);
105 
106  printf("%s: \033[32mOK\e[0m\n", argv[0]);
107  return EXIT_SUCCESS;
108 }
nftnl_expr_iter
Definition: rule.c:694