libxt module for the AUDIT target.
-j AUDIT --type (accept|reject|drop)
Signed-off-by: Thomas Graf <tgraf@xxxxxxxxxx>
diff --git a/extensions/libxt_AUDIT.c b/extensions/libxt_AUDIT.c
new file mode 100644
index 0000000..1f2dee4
--- /dev/null
+++ b/extensions/libxt_AUDIT.c
@@ -0,0 +1,123 @@
+/* Shared library add-on to xtables for AUDIT
+ *
+ * (C) 2010-2011, Thomas Graf <tgraf@xxxxxxxxxx>
+ * (C) 2010-2011, Red Hat, Inc.
+ *
+ * This program is distributed under the terms of GNU GPL v2, 1991
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter/xt_AUDIT.h>
+
+static void audit_help(void)
+{
+ printf(
+"AUDIT target options\n"
+" --type TYPE Action type to be recorded.\n");
+}
+
+static const struct option audit_opts[] = {
+ {.name = "type", .has_arg = true, .val = 't'},
+ XT_GETOPT_TABLEEND,
+};
+
+static int audit_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ struct xt_audit_info *einfo
+ = (struct xt_audit_info *)(*target)->data;
+
+ switch (c) {
+ case 't':
+ if (!strcasecmp(optarg, "accept"))
+ einfo->type = XT_AUDIT_TYPE_ACCEPT;
+ else if (!strcasecmp(optarg, "drop"))
+ einfo->type = XT_AUDIT_TYPE_DROP;
+ else if (!strcasecmp(optarg, "reject"))
+ einfo->type = XT_AUDIT_TYPE_REJECT;
+ else
+ xtables_error(PARAMETER_PROBLEM,
+ "Bad action type value `%s'", optarg);
+
+ if (*flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "AUDIT: Can't specify --type twice");
+ *flags = 1;
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void audit_final_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "AUDIT target: Parameter --type is required");
+}
+
+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 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,
+ .parse = audit_parse,
+ .final_check = audit_final_check,
+ .print = audit_print,
+ .save = audit_save,
+ .extra_opts = audit_opts,
+};
+
+void _init(void)
+{
+ xtables_register_target(&audit_tg_reg);
+}
diff --git a/include/linux/netfilter/xt_AUDIT.h b/include/linux/netfilter/xt_AUDIT.h
new file mode 100644
index 0000000..38751d2
--- /dev/null
+++ b/include/linux/netfilter/xt_AUDIT.h
@@ -0,0 +1,30 @@
+/*
+ * Header file for iptables xt_AUDIT target
+ *
+ * (C) 2010-2011 Thomas Graf <tgraf@xxxxxxxxxx>
+ * (C) 2010-2011 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _XT_AUDIT_TARGET_H
+#define _XT_AUDIT_TARGET_H
+
+#include <linux/types.h>
+
+enum {
+ XT_AUDIT_TYPE_ACCEPT = 0,
+ XT_AUDIT_TYPE_DROP,
+ XT_AUDIT_TYPE_REJECT,
+ __XT_AUDIT_TYPE_MAX,
+};
+
+#define XT_AUDIT_TYPE_MAX (__XT_AUDIT_TYPE_MAX - 1)
+
+struct xt_audit_info {
+ __u8 type; /* XT_AUDIT_TYPE_* */
+};
+
+#endif /* _XT_AUDIT_TARGET_H */
--
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