libnftnl 1.2.9
nft-expr_cmp-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 <netinet/in.h>
11#include <netinet/ip.h>
12#include <linux/netfilter/nf_tables.h>
13#include <libmnl/libmnl.h>
14#include <libnftnl/rule.h>
15#include <libnftnl/expr.h>
16
17static int test_ok = 1;
18
19static void print_err(const char *msg)
20{
21 test_ok = 0;
22 printf("\033[31mERROR:\e[0m %s\n", msg);
23}
24
25static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
26 struct nftnl_expr *rule_b)
27{
28 uint32_t data_lena, data_lenb;
29
30 nftnl_expr_get(rule_a, NFTNL_EXPR_CMP_DATA, &data_lena);
31 nftnl_expr_get(rule_b, NFTNL_EXPR_CMP_DATA, &data_lenb);
32 if (data_lena != data_lenb)
33 print_err("Size of NFTNL_EXPR_CMP_DATA mismatches");
34 if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_CMP_SREG) !=
35 nftnl_expr_get_u32(rule_b, NFTNL_EXPR_CMP_SREG))
36 print_err("Expr NFTNL_EXPR_CMP_SREG mismatches");
37 if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_CMP_OP) !=
38 nftnl_expr_get_u32(rule_b, NFTNL_EXPR_CMP_OP))
39 print_err("Expr NFTNL_EXPR_CMP_OP mismatches");
40}
41
42int main(int argc, char *argv[])
43{
44 struct nftnl_rule *a, *b;
45 struct nftnl_expr *ex;
46 struct nlmsghdr *nlh;
47 char buf[4096];
48 struct nftnl_expr_iter *iter_a, *iter_b;
49 struct nftnl_expr *rule_a, *rule_b;
50 uint32_t data_len = 0x01010101;
51
52 a = nftnl_rule_alloc();
53 b = nftnl_rule_alloc();
54 if (a == NULL || b == NULL)
55 print_err("OOM");
56 ex = nftnl_expr_alloc("cmp");
57 if (ex == NULL)
58 print_err("OOM");
59
60 nftnl_expr_set(ex, NFTNL_EXPR_CMP_DATA, &data_len, sizeof(data_len));
61 nftnl_expr_set_u32(ex, NFTNL_EXPR_CMP_SREG, 0x12345678);
62 nftnl_expr_set_u32(ex, NFTNL_EXPR_CMP_OP, 0x78123456);
63
64 nftnl_rule_add_expr(a, ex);
65
66 nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
67 nftnl_rule_nlmsg_build_payload(nlh, a);
68
69 if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
70 print_err("parsing problems");
71
72 iter_a = nftnl_expr_iter_create(a);
73 iter_b = nftnl_expr_iter_create(b);
74 if (iter_a == NULL || iter_b == NULL)
75 print_err("OOM");
76 rule_a = nftnl_expr_iter_next(iter_a);
77 rule_b = nftnl_expr_iter_next(iter_b);
78 if (rule_a == NULL || rule_b == NULL)
79 print_err("OOM");
80
81 cmp_nftnl_expr(rule_a, rule_b);
82
83 if (nftnl_expr_iter_next(iter_a) != NULL ||
84 nftnl_expr_iter_next(iter_b) != NULL)
85 print_err("More 1 expr.");
86
87 nftnl_expr_iter_destroy(iter_a);
88 nftnl_expr_iter_destroy(iter_b);
89 nftnl_rule_free(a);
90 nftnl_rule_free(b);
91
92 if (!test_ok)
93 exit(EXIT_FAILURE);
94
95 printf("%s: \033[32mOK\e[0m\n", argv[0]);
96 return EXIT_SUCCESS;
97}