libnftnl 1.2.9
nft-expr_immediate-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#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
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_verdict(struct nftnl_expr *rule_a,
26 struct nftnl_expr *rule_b)
27{
28 const char *chain_a, *chain_b;
29 uint32_t len_a, len_b;
30
31 if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_IMM_DREG) !=
32 nftnl_expr_get_u32(rule_b, NFTNL_EXPR_IMM_DREG))
33 print_err("Expr NFTNL_EXPR_IMM_DREG mismatches");
34
35 if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_IMM_VERDICT) !=
36 nftnl_expr_get_u32(rule_b, NFTNL_EXPR_IMM_VERDICT))
37 print_err("Expr NFTNL_EXPR_IMM_VERDICT mismatches");
38
39 chain_a = nftnl_expr_get(rule_a, NFTNL_EXPR_IMM_CHAIN, &len_a);
40 chain_b = nftnl_expr_get(rule_b, NFTNL_EXPR_IMM_CHAIN, &len_b);
41 if (len_a != len_b || strncmp(chain_a, chain_b, len_a))
42 print_err("Expr NFTNL_EXPR_IMM_CHAIN mismatches");
43}
44
45static void cmp_nftnl_expr_value(struct nftnl_expr *rule_a,
46 struct nftnl_expr *rule_b)
47{
48 const uint32_t *data_a, *data_b;
49 uint32_t len_a, len_b;
50
51 if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_IMM_DREG) !=
52 nftnl_expr_get_u32(rule_b, NFTNL_EXPR_IMM_DREG))
53 print_err("Expr NFTNL_EXPR_IMM_DREG mismatches");
54
55 data_a = nftnl_expr_get(rule_a, NFTNL_EXPR_IMM_DATA, &len_a);
56 data_b = nftnl_expr_get(rule_b, NFTNL_EXPR_IMM_DATA, &len_b);
57 if (len_a != len_b || memcmp(data_a, data_b, len_a))
58 print_err("Expr NFTNL_EXPR_IMM_DATA mismatches");
59}
60
61int main(int argc, char *argv[])
62{
63 struct nftnl_rule *a, *b;
64 struct nftnl_expr *ex_val, *ex_ver;
65 struct nlmsghdr *nlh;
66 char buf[4096];
67 struct nftnl_expr_iter *iter_a, *iter_b;
68 struct nftnl_expr *rule_a, *rule_b;
69 const char *chain = "tests_chain01234";
70 const char *data = "test_data_01234";
71
72 a = nftnl_rule_alloc();
73 b = nftnl_rule_alloc();
74 if (a == NULL || b == NULL)
75 print_err("OOM");
76 ex_val = nftnl_expr_alloc("immediate");
77 ex_ver = nftnl_expr_alloc("immediate");
78 if (!ex_val || !ex_ver)
79 print_err("OOM");
80
81 nftnl_expr_set_u32(ex_val, NFTNL_EXPR_IMM_DREG, 0x1234568);
82 nftnl_expr_set(ex_val, NFTNL_EXPR_IMM_DATA, data, sizeof(data));
83
84 nftnl_expr_set_u32(ex_ver, NFTNL_EXPR_IMM_DREG, 0x1234568);
85 nftnl_expr_set_u32(ex_ver, NFTNL_EXPR_IMM_VERDICT, NFT_GOTO);
86 nftnl_expr_set(ex_ver, NFTNL_EXPR_IMM_CHAIN, chain, sizeof(chain));
87
88 nftnl_rule_add_expr(a, ex_val);
89 nftnl_rule_add_expr(a, ex_ver);
90
91 nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
92 nftnl_rule_nlmsg_build_payload(nlh, a);
93
94 if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
95 print_err("parsing problems");
96
97 iter_a = nftnl_expr_iter_create(a);
98 iter_b = nftnl_expr_iter_create(b);
99 if (iter_a == NULL || iter_b == NULL)
100 print_err("OOM");
101
102 rule_a = nftnl_expr_iter_next(iter_a);
103 rule_b = nftnl_expr_iter_next(iter_b);
104 if (rule_a == NULL || rule_b == NULL)
105 print_err("OOM");
106
107 cmp_nftnl_expr_value(rule_a, rule_b);
108
109 rule_a = nftnl_expr_iter_next(iter_a);
110 rule_b = nftnl_expr_iter_next(iter_b);
111 if (rule_a == NULL || rule_b == NULL)
112 print_err("OOM");
113
114 cmp_nftnl_expr_verdict(rule_a, rule_b);
115
116 if (nftnl_expr_iter_next(iter_a) != NULL ||
117 nftnl_expr_iter_next(iter_b) != NULL)
118 print_err("More 2 expr.");
119
120 nftnl_expr_iter_destroy(iter_a);
121 nftnl_expr_iter_destroy(iter_b);
122 nftnl_rule_free(a);
123 nftnl_rule_free(b);
124
125 if (!test_ok)
126 exit(EXIT_FAILURE);
127
128 printf("%s: \033[32mOK\e[0m\n", argv[0]);
129 return EXIT_SUCCESS;
130}