libnftnl  1.2.8
nft-expr_payload-test.c
1 /*
2  * (C) 2013 by Ana Rey Botello <anarey@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 <linux/netfilter/xt_iprange.h>
19 #include <libmnl/libmnl.h>
20 #include <libnftnl/rule.h>
21 #include <libnftnl/expr.h>
22 
23 static int test_ok = 1;
24 
25 static void print_err(const char *msg)
26 {
27  test_ok = 0;
28  printf("\033[31mERROR:\e[0m %s\n", msg);
29 }
30 
31 static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
32  struct nftnl_expr *rule_b)
33 {
34  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_PAYLOAD_DREG) !=
35  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_PAYLOAD_DREG))
36  print_err("Expr NFTNL_EXPR_PAYLOAD_DREG mismatches");
37  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_PAYLOAD_BASE) !=
38  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_PAYLOAD_BASE))
39  print_err("Expr NFTNL_EXPR_PAYLOAD_BASE mismatches");
40  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_PAYLOAD_OFFSET) !=
41  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_PAYLOAD_OFFSET))
42  print_err("Expr NFTNL_EXPR_PAYLOAD_OFFSET mismatches");
43  if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_PAYLOAD_LEN) !=
44  nftnl_expr_get_u32(rule_b, NFTNL_EXPR_PAYLOAD_LEN))
45  print_err("Expr NFTNL_EXPR_PAYLOAD_LEN 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("payload");
62  if (ex == NULL)
63  print_err("OOM");
64 
65  nftnl_expr_set_u32(ex, NFTNL_EXPR_PAYLOAD_DREG, 0x1234568);
66  nftnl_expr_set_u32(ex, NFTNL_EXPR_PAYLOAD_BASE, 0x78123456);
67  nftnl_expr_set_u32(ex, NFTNL_EXPR_PAYLOAD_OFFSET, 0x56781234);
68  nftnl_expr_set_u32(ex, NFTNL_EXPR_PAYLOAD_LEN, 0x78561234);
69 
70  nftnl_rule_add_expr(a, ex);
71 
72  nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
73  nftnl_rule_nlmsg_build_payload(nlh, a);
74  if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
75  print_err("parsing problems");
76 
77  iter_a = nftnl_expr_iter_create(a);
78  iter_b = nftnl_expr_iter_create(b);
79  if (iter_a == NULL || iter_b == NULL)
80  print_err("OOM");
81 
82  rule_a = nftnl_expr_iter_next(iter_a);
83  rule_b = nftnl_expr_iter_next(iter_b);
84  if (rule_a == NULL || rule_b == NULL)
85  print_err("OOM");
86 
87  cmp_nftnl_expr(rule_a, rule_b);
88 
89  if (nftnl_expr_iter_next(iter_a) != NULL ||
90  nftnl_expr_iter_next(iter_b) != NULL)
91  print_err("More 1 expr.");
92 
93  nftnl_expr_iter_destroy(iter_a);
94  nftnl_expr_iter_destroy(iter_b);
95  nftnl_rule_free(a);
96  nftnl_rule_free(b);
97 
98  if (!test_ok)
99  exit(EXIT_FAILURE);
100 
101  printf("%s: \033[32mOK\e[0m\n", argv[0]);
102  return EXIT_SUCCESS;
103 }