src: add dup statement support

This allows you to clone packets to destination address, eg.

... dup to 172.20.0.2
... dup to 172.20.0.2 device eth1
... dup to ip saddr map { 192.168.0.2 : 172.20.0.2, ... } device eth1

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/statement.h b/include/statement.h
index bead0a6f..8b035d31 100644
--- a/include/statement.h
+++ b/include/statement.h
@@ -105,6 +105,13 @@ struct ct_stmt {
 extern struct stmt *ct_stmt_alloc(const struct location *loc,
 				  enum nft_ct_keys key,
 				  struct expr *expr);
+struct dup_stmt {
+	struct expr		*to;
+	struct expr		*dev;
+};
+
+struct stmt *dup_stmt_alloc(const struct location *loc);
+uint32_t dup_stmt_type(const char *type);
 
 struct set_stmt {
 	struct expr		*set;
@@ -131,6 +138,7 @@ extern struct stmt *set_stmt_alloc(const struct location *loc);
  * @STMT_QUEUE:		QUEUE statement
  * @STMT_CT:		conntrack statement
  * @STMT_SET:		set statement
+ * @STMT_DUP:		dup statement
  */
 enum stmt_types {
 	STMT_INVALID,
@@ -147,6 +155,7 @@ enum stmt_types {
 	STMT_QUEUE,
 	STMT_CT,
 	STMT_SET,
+	STMT_DUP,
 };
 
 /**
@@ -197,6 +206,7 @@ struct stmt {
 		struct queue_stmt	queue;
 		struct ct_stmt		ct;
 		struct set_stmt		set;
+		struct dup_stmt		dup;
 	};
 };