From d870b461bd54fdc090446cb4657fb92312619461 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Mon, 13 Nov 2000 14:37:20 +0000
Subject: shlib plugin foer ip6tables MARK added

---
 extensions/libip6t_MARK.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 extensions/libip6t_MARK.c

(limited to 'extensions/libip6t_MARK.c')

diff --git a/extensions/libip6t_MARK.c b/extensions/libip6t_MARK.c
new file mode 100644
index 00000000..efbb4ec0
--- /dev/null
+++ b/extensions/libip6t_MARK.c
@@ -0,0 +1,121 @@
+/* Shared library add-on to iptables to add MARK target support. */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv6/ip6t_MARK.h>
+
+struct markinfo {
+	struct ip6t_entry_target t;
+	struct ip6t_mark_target_info mark;
+};
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+	printf(
+"MARK target v%s options:\n"
+"  --set-mark value                   Set nfmark value\n"
+"\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+	{ "set-mark", 1, 0, '1' },
+	{ 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct ip6t_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 struct ip6t_entry *entry,
+      struct ip6t_entry_target **target)
+{
+	struct ip6t_mark_target_info *markinfo
+		= (struct ip6t_mark_target_info *)(*target)->data;
+
+	switch (c) {
+		char *end;
+	case '1':
+		markinfo->mark = strtoul(optarg, &end, 0);
+		if (*end != '\0' || end == optarg)
+			exit_error(PARAMETER_PROBLEM, "Bad MARK value `%s'", optarg);
+		if (*flags)
+			exit_error(PARAMETER_PROBLEM,
+			           "MARK target: Can't specify --set-mark twice");
+		*flags = 1;
+		break;
+
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+	if (!flags)
+		exit_error(PARAMETER_PROBLEM,
+		           "MARK target: Parameter --set-mark is required");
+}
+
+static void
+print_mark(unsigned long mark, int numeric)
+{
+	printf("0x%lx ", mark);
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ip6t_ip6 *ip,
+      const struct ip6t_entry_target *target,
+      int numeric)
+{
+	const struct ip6t_mark_target_info *markinfo =
+		(const struct ip6t_mark_target_info *)target->data;
+	printf("MARK set ");
+	print_mark(markinfo->mark, numeric);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const struct ip6t_ip6 *ip, const struct ip6t_entry_target *target)
+{
+	const struct ip6t_mark_target_info *markinfo =
+		(const struct ip6t_mark_target_info *)target->data;
+
+	printf("--set-mark 0x%lx ", markinfo->mark);
+}
+
+struct ip6tables_target mark
+= { NULL,
+    "MARK",
+    NETFILTER_VERSION,
+    IP6T_ALIGN(sizeof(struct ip6t_mark_target_info)),
+    IP6T_ALIGN(sizeof(struct ip6t_mark_target_info)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+	register_target6(&mark);
+}
-- 
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