From 35a6b10c1bc488ca195e9c641563c29251f725f3 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 24 Apr 2020 21:56:51 +0200
Subject: src: add netmap support

This patch allows you to specify an interval of IP address in maps.

 table ip x {
        chain y {
                type nat hook postrouting priority srcnat; policy accept;
                snat ip prefix to ip saddr map { 10.141.11.0/24 : 192.168.2.0/24 }
        }
 }

The example above performs SNAT to packets that comes from
10.141.11.0/24 using the prefix 192.168.2.0/24, e.g. 10.141.11.4 is
mangled to 192.168.2.4.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/parser_bison.y | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/parser_bison.y')

diff --git a/src/parser_bison.y b/src/parser_bison.y
index 731a5b3e..3b470cc6 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -3205,6 +3205,23 @@ nat_stmt_args		:	stmt_expr
 				$<stmt>0->nat.addr = $3;
 				$<stmt>0->nat.type_flags = STMT_NAT_F_INTERVAL;
 			}
+			|	nf_key_proto PREFIX TO	stmt_expr
+			{
+				$<stmt>0->nat.family = $1;
+				$<stmt>0->nat.addr = $4;
+				$<stmt>0->nat.type_flags =
+						STMT_NAT_F_PREFIX |
+						STMT_NAT_F_INTERVAL;
+				$<stmt>0->nat.flags |= NF_NAT_RANGE_NETMAP;
+			}
+			|	PREFIX TO	stmt_expr
+			{
+				$<stmt>0->nat.addr = $3;
+				$<stmt>0->nat.type_flags =
+						STMT_NAT_F_PREFIX |
+						STMT_NAT_F_INTERVAL;
+				$<stmt>0->nat.flags |= NF_NAT_RANGE_NETMAP;
+			}
 			;
 
 masq_stmt		:	masq_stmt_alloc		masq_stmt_args
-- 
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