Add support for TTL

Signed-off-by: rezaadi0105 <[email protected]>
Backup-Gits · Jul 24, 2021 · 4677827 · 4677827
1 parent e486a83
commit 4677827
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Showing 3 changed files with 38 additions and 0 deletions.
diff --git a/include/linux/netfilter_ipv4/ipt_TTL.h b/include/linux/netfilter_ipv4/ipt_TTL.h
@@ -0,0 +1,16 @@
+/* TTL modification module for IP tables
+* (C) 2000 by Harald Welte <[email protected]> */
+#ifndef _IPT_TTL_H
+#define _IPT_TTL_H
+#include <linux/types.h>
+enum {
+    IPT_TTL_SET = 0,
+    IPT_TTL_INC,
+    IPT_TTL_DEC
+    };
+#define IPT_TTL_MAXMODE IPT_TTL_DEC
+struct ipt_TTL_info {
+   __u8 mode;
+   __u8 ttl;
+   };
+#endif
diff --git a/include/linux/netfilter_ipv6/ip6t_HL.h b/include/linux/netfilter_ipv6/ip6t_HL.h
@@ -0,0 +1,19 @@
+/* TTL modification module for IP tables
+* (C) 2000 by Harald Welte <[email protected]> */
+#ifndef _IP6T_HL_H
+#define _IP6T_HL_H
+#include <linux/types.h>
+
+enum {
+    IP6T_HL_SET = 0,
+    IP6T_HL_INC,
+    IP6T_HL_DEC
+};
+
+#define IP6T_HL_MAXMODE IP6T_HL_DEC
+
+struct ip6t_HL_info {
+   __u8 mode;
+   __u8 hop_limit;
+};
+#endif
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
@@ -110,6 +110,9 @@ obj-$(CONFIG_NFT_FWD_NETDEV)	+= nft_fwd_netdev.o
 # generic X tables 
 obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
 
+# TTL
+obj-$(CONFIG_IP_NF_TARGET_TTL) += xt_HL.o
+
 # combos
 obj-$(CONFIG_NETFILTER_XT_MARK) += xt_mark.o
 obj-$(CONFIG_NETFILTER_XT_CONNMARK) += xt_connmark.o