libnftnl 1.2.6
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
22static int test_ok = 1;
23
24static void print_err(const char *msg)
25{
26 test_ok = 0;
27 printf("\033[31mERROR:\e[0m %s\n", msg);
28}
29
30static 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
53int 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_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}