libnftnl  1.2.9
nft-expr_hash-test.c
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * (C) 2016 by Laura Garcia <nevola@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 
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 cmp_nftnl_expr(struct nftnl_expr *rule_a,
26  struct nftnl_expr *rule_b)
27 {
28  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_SREG) !=
29  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_SREG))
30  print_err("Expr NFTNL_EXPR_HASH_SREG mismatches");
31  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_DREG) !=
32  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_DREG))
33  print_err("Expr NFTNL_EXPR_HASH_DREG mismatches");
34  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_MODULUS) !=
35  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_MODULUS))
36  print_err("Expr NFTNL_EXPR_HASH_MODULUS mismatches");
37  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_SEED) !=
38  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_SEED))
39  print_err("Expr NFTNL_EXPR_HASH_SEED mismatches");
40  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_OFFSET) !=
41  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_OFFSET))
42  print_err("Expr NFTNL_EXPR_HASH_OFFSET mismatches");
43  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_TYPE) !=
44  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_TYPE))
45  print_err("Expr NFTNL_EXPR_HASH_TYPE mismatches");
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 
57  a = nftnl_rule_alloc();
58  b = nftnl_rule_alloc();
59  if (a == NULL || b == NULL)
60  print_err("OOM");
61  ex = nftnl_expr_alloc("hash");
62  if (ex == NULL)
63  print_err("OOM");
64 
65  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_SREG, 0x1234568);
66  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_DREG, 0x78123456);
67  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_MODULUS, 0x78123456);
68  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_SEED, 0x78123456);
69  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_OFFSET, 0x3612845);
70  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_TYPE, NFT_HASH_JENKINS);
71 
72  nftnl_rule_add_expr(a, ex);
73 
74  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
75  nftnl_rule_nlmsg_build_payload(nlh, a);
76  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
77  print_err("parsing problems");
78 
79  iter_a = nftnl_expr_iter_create(a);
80  iter_b = nftnl_expr_iter_create(b);
81  if (iter_a == NULL || iter_b == NULL)
82  print_err("OOM");
83 
84  rule_a = nftnl_expr_iter_next(iter_a);
85  rule_b = nftnl_expr_iter_next(iter_b);
86  if (rule_a == NULL || rule_b == NULL)
87  print_err("OOM");
88 
89  cmp_nftnl_expr(rule_a, rule_b);
90 
91  if (nftnl_expr_iter_next(iter_a) != NULL ||
92  nftnl_expr_iter_next(iter_b) != NULL)
93  print_err("More 1 expr.");
94 
95  nftnl_expr_iter_destroy(iter_a);
96  nftnl_expr_iter_destroy(iter_b);
97  nftnl_rule_free(a);
98  nftnl_rule_free(b);
99 
100  if (!test_ok)
101  exit(EXIT_FAILURE);
102 
103  printf("%s: \033[32mOK\e[0m\n", argv[0]);
104  return EXIT_SUCCESS;
105 }