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/*
* (C) 2016 by Laura Garcia <nevola@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <linux/netfilter/nf_tables.h>
#include <libmnl/libmnl.h>
#include <libnftnl/rule.h>
#include <libnftnl/expr.h>
static int test_ok = 1;
static void print_err(const char *msg)
{
test_ok = 0;
printf("\033[31mERROR:\e[0m %s\n", msg);
}
static void cmp_nftnl_expr(struct nftnl_expr *rule_a,
struct nftnl_expr *rule_b)
{
if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_NG_DREG) !=
nftnl_expr_get_u32(rule_b, NFTNL_EXPR_NG_DREG))
print_err("Expr NFTNL_EXPR_NG_DREG mismatches");
if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_NG_MODULUS) !=
nftnl_expr_get_u32(rule_b, NFTNL_EXPR_NG_MODULUS))
print_err("Expr NFTNL_EXPR_NG_MODULUS mismatches");
if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_NG_TYPE) !=
nftnl_expr_get_u32(rule_b, NFTNL_EXPR_NG_TYPE))
print_err("Expr NFTNL_EXPR_NG_TYPE mismatches");
if (nftnl_expr_get_u32(rule_a, NFTNL_EXPR_NG_OFFSET) !=
nftnl_expr_get_u32(rule_b, NFTNL_EXPR_NG_OFFSET))
print_err("Expr NFTNL_EXPR_NG_OFFSET mismatches");
}
int main(int argc, char *argv[])
{
struct nftnl_rule *a, *b;
struct nftnl_expr *ex;
struct nlmsghdr *nlh;
char buf[4096];
struct nftnl_expr_iter *iter_a, *iter_b;
struct nftnl_expr *rule_a, *rule_b;
a = nftnl_rule_alloc();
b = nftnl_rule_alloc();
if (a == NULL || b == NULL)
print_err("OOM");
ex = nftnl_expr_alloc("numgen");
if (ex == NULL)
print_err("OOM");
nftnl_expr_set_u32(ex, NFTNL_EXPR_NG_DREG, 0x1234568);
nftnl_expr_set_u32(ex, NFTNL_EXPR_NG_MODULUS, 0x78123456);
nftnl_expr_set_u32(ex, NFTNL_EXPR_NG_TYPE, NFT_NG_INCREMENTAL);
nftnl_expr_set_u32(ex, NFTNL_EXPR_NG_OFFSET, 0x1000000);
nftnl_rule_add_expr(a, ex);
nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, AF_INET, 0, 1234);
nftnl_rule_nlmsg_build_payload(nlh, a);
if (nftnl_rule_nlmsg_parse(nlh, b) < 0)
print_err("parsing problems");
iter_a = nftnl_expr_iter_create(a);
iter_b = nftnl_expr_iter_create(b);
if (iter_a == NULL || iter_b == NULL)
print_err("OOM");
rule_a = nftnl_expr_iter_next(iter_a);
rule_b = nftnl_expr_iter_next(iter_b);
if (rule_a == NULL || rule_b == NULL)
print_err("OOM");
cmp_nftnl_expr(rule_a, rule_b);
if (nftnl_expr_iter_next(iter_a) != NULL ||
nftnl_expr_iter_next(iter_b) != NULL)
print_err("More 1 expr.");
nftnl_expr_iter_destroy(iter_a);
nftnl_expr_iter_destroy(iter_b);
nftnl_rule_free(a);
nftnl_rule_free(b);
if (!test_ok)
exit(EXIT_FAILURE);
printf("%s: \033[32mOK\e[0m\n", argv[0]);
return EXIT_SUCCESS;
}
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