Unifies libip[6]t_SECMARK.c into libxt_SECMARK.c

1 files changed, 144 insertions, 0 deletions

diff --git a/extensions/libxt_SECMARK.c b/extensions/libxt_SECMARK.c
new file mode 100644
index 00000000..38aaca9b
--- /dev/null
+++ b/extensions/libxt_SECMARK.c
@@ -0,0 +1,144 @@
+/*
+ * Shared library add-on to iptables to add SECMARK target support.
+ *
+ * Based on the MARK target.
+ *
+ * Copyright (C) 2006 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter/xt_SECMARK.h>
+
+#define PFX "SECMARK target: "
+
+static void help(void)
+{
+	printf(
+"SECMARK target v%s options:\n"
+"  --selctx value                     Set the SELinux security context\n"
+"\n",
+IPTABLES_VERSION);
+}
+
+static struct option opts[] = {
+	{ "selctx", 1, 0, '1' },
+	{ 0 }
+};
+
+/* Initialize the target. */
+static void init(struct xt_entry_target *t, unsigned int *nfcache)
+{ }
+
+/*
+ * Function which parses command options; returns true if it
+ * ate an option.
+ */
+static int parse(int c, char **argv, int invert, unsigned int *flags,
+                 const void *entry, struct xt_entry_target **target)
+{
+	struct xt_secmark_target_info *info =
+		(struct xt_secmark_target_info*)(*target)->data;
+
+	switch (c) {
+	case '1':
+		if (*flags & SECMARK_MODE_SEL)
+			exit_error(PARAMETER_PROBLEM, PFX
+				   "Can't specify --selctx twice");
+		info->mode = SECMARK_MODE_SEL;
+
+		if (strlen(optarg) > SECMARK_SELCTX_MAX-1)
+			exit_error(PARAMETER_PROBLEM, PFX
+				   "Maximum length %u exceeded by --selctx"
+				   " parameter (%zu)",
+				   SECMARK_SELCTX_MAX-1, strlen(optarg));
+
+		strcpy(info->u.sel.selctx, optarg);
+		*flags |= SECMARK_MODE_SEL;
+		break;
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void final_check(unsigned int flags)
+{
+	if (!flags)
+		exit_error(PARAMETER_PROBLEM, PFX "parameter required");
+}
+
+static void print_secmark(struct xt_secmark_target_info *info)
+{
+	switch (info->mode) {
+	case SECMARK_MODE_SEL:
+		printf("selctx %s ", info->u.sel.selctx);\
+		break;
+	
+	default:
+		exit_error(OTHER_PROBLEM, PFX "invalid mode %hhu\n", info->mode);
+	}
+}
+
+static void print(const void *ip,
+		  const struct xt_entry_target *target, int numeric)
+{
+	struct xt_secmark_target_info *info =
+		(struct xt_secmark_target_info*)(target)->data;
+
+	printf("SECMARK ");
+	print_secmark(info);
+}
+
+/* Saves the target info in parsable form to stdout. */
+static void save(const void *ip, const struct xt_entry_target *target)
+{
+	struct xt_secmark_target_info *info =
+		(struct xt_secmark_target_info*)target->data;
+
+	printf("--");
+	print_secmark(info);
+}
+
+static struct xtables_target secmark = {
+	.next		= NULL,
+	.family		= AF_INET,
+	.name		= "SECMARK",
+	.version	= IPTABLES_VERSION,
+	.revision	= 0,
+	.size		= XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+	.help		= &help,
+	.init		= &init,
+	.parse		= &parse,
+	.final_check	= &final_check,
+	.print		= &print,
+	.save		= &save,
+	.extra_opts	= opts
+};
+
+static struct xtables_target secmark6 = {
+	.next		= NULL,
+	.family		= AF_INET6,
+	.name		= "SECMARK",
+	.version	= IPTABLES_VERSION,
+	.revision	= 0,
+	.size		= XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+	.help		= &help,
+	.init		= &init,
+	.parse		= &parse,
+	.final_check	= &final_check,
+	.print		= &print,
+	.save		= &save,
+	.extra_opts	= opts
+};
+
+void _init(void)
+{
+	xtables_register_target(&secmark);
+	xtables_register_target(&secmark6);
+}