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authorThomas Graf <tgraf@redhat.com>2011-01-20 11:24:13 +0100
committerPatrick McHardy <kaber@trash.net>2011-01-20 11:24:13 +0100
commit773438bd93851dc1a9129a638925c04868820297 (patch)
tree2567482b5f35bde7675a8a80e2ef8b72d4022c54 /extensions/libxt_AUDIT.c
parent5da9e63f66ca190cb90193ebb9eebf5aa523b4d1 (diff)
libxt_AUDIT: add AUDIT target
libxt module for the AUDIT target. -j AUDIT --type (accept|reject|drop) Signed-off-by: Thomas Graf <tgraf@redhat.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'extensions/libxt_AUDIT.c')
-rw-r--r--extensions/libxt_AUDIT.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/extensions/libxt_AUDIT.c b/extensions/libxt_AUDIT.c
new file mode 100644
index 00000000..1f2dee44
--- /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@redhat.com>
+ * (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);
+}