2 files changed, 173 insertions, 0 deletions
diff --git a/extensions/.IPMARK-test b/extensions/.IPMARK-test
new file mode 100755
index 00000000..7996c889
--- /dev/null
+++ b/extensions/.IPMARK-test
@@ -0,0 +1,3 @@
+#!/bin/sh
+# True if IPMARK patch is applied.
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_IPMARK.h ] && echo IPMARK
diff --git a/extensions/libipt_IPMARK.c b/extensions/libipt_IPMARK.c
new file mode 100644
index 00000000..80fbf5c6
--- /dev/null
+++ b/extensions/libipt_IPMARK.c
@@ -0,0 +1,170 @@
+/* Shared library add-on to iptables to add IPMARK target support.
+ * (C) 2003 by Grzegorz Janoszka <Grzegorz.Janoszka@pro.onet.pl>
+ *
+ * based on original MARK target
+ * 
+ * This program is distributed under the terms of GNU GPL
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_IPMARK.h>
+
+#define IPT_ADDR_USED        1
+#define IPT_AND_MASK_USED    2
+#define IPT_OR_MASK_USED     4
+
+struct ipmarkinfo {
+	struct ipt_entry_target t;
+	struct ipt_ipmark_target_info ipmark;
+};
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+	printf(
+"IPMARK target v%s options:\n"
+"  --addr src/dst         use source or destination ip address\n"
+"  --and-mask value       logical AND ip address with this value becomes MARK\n"
+"  --or-mask value        logical OR ip address with this value becomes MARK\n"
+"\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+	{ "addr", 1, 0, '1' },
+	{ "and-mask", 1, 0, '2' },
+	{ "or-mask", 1, 0, '3' },
+	{ 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct ipt_entry_target *t, unsigned int *nfcache)
+{
+	struct ipt_ipmark_target_info *ipmarkinfo =
+		(struct ipt_ipmark_target_info *)t->data;
+
+	ipmarkinfo->andmask=0xffffffff;
+	ipmarkinfo->ormask=0;
+
+	*nfcache |= NFC_UNKNOWN;
+}
+
+/* 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 ipt_entry *entry,
+      struct ipt_entry_target **target)
+{
+	struct ipt_ipmark_target_info *ipmarkinfo
+		= (struct ipt_ipmark_target_info *)(*target)->data;
+
+	switch (c) {
+		char *end;
+	case '1':
+		if(!strcmp(optarg, "src")) ipmarkinfo->addr=IPT_IPMARK_SRC;
+		  else if(!strcmp(optarg, "dst")) ipmarkinfo->addr=IPT_IPMARK_DST;
+		    else exit_error(PARAMETER_PROBLEM, "Bad addr value `%s' - should be `src' or `dst'", optarg);
+		if (*flags & IPT_ADDR_USED)
+			exit_error(PARAMETER_PROBLEM,
+			           "IPMARK target: Can't specify --addr twice");
+		*flags |= IPT_ADDR_USED;
+		break;
+	
+	case '2':
+		ipmarkinfo->andmask = strtoul(optarg, &end, 0);
+		if (*end != '\0' || end == optarg)
+			exit_error(PARAMETER_PROBLEM, "Bad and-mask value `%s'", optarg);
+		if (*flags & IPT_AND_MASK_USED)
+			exit_error(PARAMETER_PROBLEM,
+			           "IPMARK target: Can't specify --and-mask twice");
+		*flags |= IPT_AND_MASK_USED;
+		break;
+	case '3':
+		ipmarkinfo->ormask = strtoul(optarg, &end, 0);
+		if (*end != '\0' || end == optarg)
+			exit_error(PARAMETER_PROBLEM, "Bad or-mask value `%s'", optarg);
+		if (*flags & IPT_OR_MASK_USED)
+			exit_error(PARAMETER_PROBLEM,
+			           "IPMARK target: Can't specify --or-mask twice");
+		*flags |= IPT_OR_MASK_USED;
+		break;
+
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+	if (!(flags & IPT_ADDR_USED))
+		exit_error(PARAMETER_PROBLEM,
+		           "IPMARK target: Parameter --addr is required");
+	if (!(flags & (IPT_AND_MASK_USED | IPT_OR_MASK_USED)))
+		exit_error(PARAMETER_PROBLEM,
+		           "IPMARK target: Parameter --and-mask or --or-mask is required");
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ipt_ip *ip,
+      const struct ipt_entry_target *target,
+      int numeric)
+{
+	const struct ipt_ipmark_target_info *ipmarkinfo =
+		(const struct ipt_ipmark_target_info *)target->data;
+
+	if(ipmarkinfo->addr == IPT_IPMARK_SRC)
+	  printf("IPMARK src");
+	else
+	  printf("IPMARK dst");
+	printf(" ip and 0x%lx or 0x%lx", ipmarkinfo->andmask, ipmarkinfo->ormask);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
+{
+	const struct ipt_ipmark_target_info *ipmarkinfo =
+		(const struct ipt_ipmark_target_info *)target->data;
+
+	if(ipmarkinfo->addr == IPT_IPMARK_SRC)
+	  printf("--addr=src ");
+	else
+	  printf("--addr=dst ");
+	if(ipmarkinfo->andmask != 0xffffffff)
+	  printf("--and-mask 0x%lx ", ipmarkinfo->andmask);
+	if(ipmarkinfo->ormask != 0)
+	  printf("--or-mask 0x%lx ", ipmarkinfo->ormask);
+}
+
+static
+struct iptables_target ipmark
+= { NULL,
+    "IPMARK",
+    NETFILTER_VERSION,
+    IPT_ALIGN(sizeof(struct ipt_ipmark_target_info)),
+    IPT_ALIGN(sizeof(struct ipt_ipmark_target_info)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+	register_target(&ipmark);
+}