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/* Shared library add-on to xtables for AUDIT
*
* (C) 2010-2011, Thomas Graf <tgraf@redhat.com>
* (C) 2010-2011, Red Hat, Inc.
*
* This program is distributed under the terms of GNU GPL v2, 1991
*/
#include <stdio.h>
#include <string.h>
#include <xtables.h>
#include <linux/netfilter/xt_AUDIT.h>
enum {
O_AUDIT_TYPE = 0,
};
static void audit_help(void)
{
printf(
"AUDIT target options\n"
" --type TYPE Action type to be recorded.\n");
}
static const struct xt_option_entry audit_opts[] = {
{.name = "type", .id = O_AUDIT_TYPE, .type = XTTYPE_STRING,
.flags = XTOPT_MAND},
XTOPT_TABLEEND,
};
static void audit_parse(struct xt_option_call *cb)
{
struct xt_audit_info *einfo = cb->data;
xtables_option_parse(cb);
if (strcasecmp(cb->arg, "accept") == 0)
einfo->type = XT_AUDIT_TYPE_ACCEPT;
else if (strcasecmp(cb->arg, "drop") == 0)
einfo->type = XT_AUDIT_TYPE_DROP;
else if (strcasecmp(cb->arg, "reject") == 0)
einfo->type = XT_AUDIT_TYPE_REJECT;
else
xtables_error(PARAMETER_PROBLEM,
"Bad action type value \"%s\"", cb->arg);
}
static void audit_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
const struct xt_audit_info *einfo =
(const struct xt_audit_info *)target->data;
printf(" AUDIT ");
switch(einfo->type) {
case XT_AUDIT_TYPE_ACCEPT:
printf("accept");
break;
case XT_AUDIT_TYPE_DROP:
printf("drop");
break;
case XT_AUDIT_TYPE_REJECT:
printf("reject");
break;
}
}
static void audit_save(const void *ip, const struct xt_entry_target *target)
{
const struct xt_audit_info *einfo =
(const struct xt_audit_info *)target->data;
switch(einfo->type) {
case XT_AUDIT_TYPE_ACCEPT:
printf(" --type accept");
break;
case XT_AUDIT_TYPE_DROP:
printf(" --type drop");
break;
case XT_AUDIT_TYPE_REJECT:
printf(" --type reject");
break;
}
}
static int audit_xlate(struct xt_xlate *xl,
const struct xt_xlate_tg_params *params)
{
/* audit type is merely sanity checked by xt_AUDIT.ko,
* so nftables doesn't even support it */
xt_xlate_add(xl, "log level audit");
return 1;
}
static struct xtables_target audit_tg_reg = {
.name = "AUDIT",
.version = XTABLES_VERSION,
.family = NFPROTO_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_audit_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_audit_info)),
.help = audit_help,
.print = audit_print,
.save = audit_save,
.x6_parse = audit_parse,
.x6_options = audit_opts,
.xlate = audit_xlate,
};
void _init(void)
{
xtables_register_target(&audit_tg_reg);
}
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