nft-rule-test.c
/*
* (C) 2013 by Ana Rey Botello <anarey@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 <linux/netfilter/nf_tables.h>
#include <libnftnl/rule.h>
#include <libnftnl/udata.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_rule(struct nftnl_rule *a, struct nftnl_rule *b)
{
const void *udata_a, *udata_b;
uint32_t len_a, len_b;
if (nftnl_rule_get_u32(a, NFTNL_RULE_FAMILY) !=
nftnl_rule_get_u32(b, NFTNL_RULE_FAMILY))
print_err("Rule family mismatches");
if (strcmp(nftnl_rule_get_str(a, NFTNL_RULE_TABLE),
nftnl_rule_get_str(b, NFTNL_RULE_TABLE)) != 0)
print_err("Rule table mismatches");
if (strcmp(nftnl_rule_get_str(a, NFTNL_RULE_CHAIN),
nftnl_rule_get_str(b, NFTNL_RULE_CHAIN)) != 0)
print_err("Rule table mismatches");
if (nftnl_rule_get_u64(a, NFTNL_RULE_HANDLE) !=
nftnl_rule_get_u64(b, NFTNL_RULE_HANDLE))
print_err("Rule handle mismatches");
if (nftnl_rule_get_u32(a, NFTNL_RULE_COMPAT_PROTO) !=
nftnl_rule_get_u32(b, NFTNL_RULE_COMPAT_PROTO))
print_err("Rule compat_proto mismatches");
if (nftnl_rule_get_u32(a, NFTNL_RULE_COMPAT_FLAGS) !=
nftnl_rule_get_u32(b, NFTNL_RULE_COMPAT_FLAGS))
print_err("Rule compat_flags mismatches");
if (nftnl_rule_get_u64(a, NFTNL_RULE_POSITION) !=
nftnl_rule_get_u64(b, NFTNL_RULE_POSITION))
print_err("Rule compat_position mismatches");
udata_a = nftnl_rule_get_data(a, NFTNL_RULE_USERDATA, &len_a);
udata_b = nftnl_rule_get_data(b, NFTNL_RULE_USERDATA, &len_b);
if (len_a != len_b || memcmp(udata_a, udata_b, len_a) != 0)
print_err("Rule userdata mismatches");
}
int main(int argc, char *argv[])
{
struct nftnl_udata_buf *udata;
struct nftnl_rule *a, *b;
char buf[4096];
struct nlmsghdr *nlh;
a = nftnl_rule_alloc();
b = nftnl_rule_alloc();
if (a == NULL || b == NULL)
print_err("OOM");
udata = nftnl_udata_buf_alloc(NFT_USERDATA_MAXLEN);
if (!udata)
print_err("OOM");
if (!nftnl_udata_put_strz(udata, 0, "hello world"))
print_err("User data too big");
nftnl_rule_set_u32(a, NFTNL_RULE_FAMILY, AF_INET);
nftnl_rule_set_str(a, NFTNL_RULE_TABLE, "table");
nftnl_rule_set_str(a, NFTNL_RULE_CHAIN, "chain");
nftnl_rule_set_u64(a, NFTNL_RULE_HANDLE, 0x1234567812345678);
nftnl_rule_set_u32(a, NFTNL_RULE_COMPAT_PROTO, 0x12345678);
nftnl_rule_set_u32(a, NFTNL_RULE_COMPAT_FLAGS, 0x12345678);
nftnl_rule_set_u64(a, NFTNL_RULE_POSITION, 0x1234567812345678);
nftnl_rule_set_data(a, NFTNL_RULE_USERDATA,
nftnl_udata_buf_data(udata),
nftnl_udata_buf_len(udata));
nftnl_udata_buf_free(udata);
nlh = nftnl_rule_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");
cmp_nftnl_rule(a,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;
}