libnftnl  1.1.8
nft-expr_hash-test.c
1 /*
2  * (C) 2016 by Laura Garcia <nevola@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 #include <netinet/in.h>
15 #include <netinet/ip.h>
16 
17 #include <linux/netfilter/nf_tables.h>
18 #include <libmnl/libmnl.h>
19 #include <libnftnl/rule.h>
20 #include <libnftnl/expr.h>
21 
22 static int test_ok = 1;
23 
24 static void print_err(const char *msg)
25 {
26  test_ok = 0;
27  printf("\033[31mERROR:\e[0m %s\n", msg);
28 }
29 
30 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
31  struct nftnl_expr *rule_b)
32 {
33  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_SREG) !=
34  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_SREG))
35  print_err("Expr NFTNL_EXPR_HASH_SREG mismatches");
36  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_DREG) !=
37  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_DREG))
38  print_err("Expr NFTNL_EXPR_HASH_DREG mismatches");
39  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_MODULUS) !=
40  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_MODULUS))
41  print_err("Expr NFTNL_EXPR_HASH_MODULUS mismatches");
42  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_SEED) !=
43  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_SEED))
44  print_err("Expr NFTNL_EXPR_HASH_SEED mismatches");
45  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_OFFSET) !=
46  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_OFFSET))
47  print_err("Expr NFTNL_EXPR_HASH_OFFSET mismatches");
48  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_HASH_TYPE) !=
49  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_HASH_TYPE))
50  print_err("Expr NFTNL_EXPR_HASH_TYPE mismatches");
51 }
52 
53 int main(int argc, char *argv[])
54 {
55  struct nftnl_rule *a, *b;
56  struct nftnl_expr *ex;
57  struct nlmsghdr *nlh;
58  char buf[4096];
59  struct nftnl_expr_iter *iter_a, *iter_b;
60  struct nftnl_expr *rule_a, *rule_b;
61 
62  a = nftnl_rule_alloc();
63  b = nftnl_rule_alloc();
64  if (a == NULL || b == NULL)
65  print_err("OOM");
66  ex = nftnl_expr_alloc("hash");
67  if (ex == NULL)
68  print_err("OOM");
69 
70  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_SREG, 0x1234568);
71  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_DREG, 0x78123456);
72  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_MODULUS, 0x78123456);
73  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_SEED, 0x78123456);
74  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_OFFSET, 0x3612845);
75  nftnl_expr_set_u32(ex, NFTNL_EXPR_HASH_TYPE, NFT_HASH_JENKINS);
76 
77  nftnl_rule_add_expr(a, ex);
78 
79  nlh = nftnl_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
80  nftnl_rule_nlmsg_build_payload(nlh, a);
81  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
82  print_err("parsing problems");
83 
84  iter_a = nftnl_expr_iter_create(a);
85  iter_b = nftnl_expr_iter_create(b);
86  if (iter_a == NULL || iter_b == NULL)
87  print_err("OOM");
88 
89  rule_a = nftnl_expr_iter_next(iter_a);
90  rule_b = nftnl_expr_iter_next(iter_b);
91  if (rule_a == NULL || rule_b == NULL)
92  print_err("OOM");
93 
94  cmp_nftnl_expr(rule_a, rule_b);
95 
96  if (nftnl_expr_iter_next(iter_a) != NULL ||
97  nftnl_expr_iter_next(iter_b) != NULL)
98  print_err("More 1 expr.");
99 
100  nftnl_expr_iter_destroy(iter_a);
101  nftnl_expr_iter_destroy(iter_b);
102  nftnl_rule_free(a);
103  nftnl_rule_free(b);
104 
105  if (!test_ok)
106  exit(EXIT_FAILURE);
107 
108  printf("%s: \033[32mOK\e[0m\n", argv[0]);
109  return EXIT_SUCCESS;
110 }
nftnl_expr_iter
Definition: rule.c:694