nftables: allow quoted string in flowtable_expr_member

This is required to be able to use flow offloading on devices with
ifnames that start with a digit, like 6in4-wan6.

Signed-off-by: Stijn Tintel <[email protected]>

package/network/utils/nftables/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nftables
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://netfilter.org/projects/$(PKG_NAME)/files

package/network/utils/nftables/patches/001-parser-allow-quoted-string-in-flowtable_expr_member.patch

@@ -0,0 +1,44 @@
+From 07af4429241c9832a613cb8620331ac54257d9df Mon Sep 17 00:00:00 2001
+From: Stijn Tintel <[email protected]>
+Date: Tue, 21 Dec 2021 12:40:25 +0200
+Subject: [PATCH] parser: allow quoted string in flowtable_expr_member
+
+Devices with interface names starting with a digit can not be configured
+in flowtables. Trying to do so throws the following error:
+
+Error: syntax error, unexpected number, expecting comma or '}'
+devices = { eth0, 6in4-wan6 };
+
+This is however a perfectly valid interface name. Solve the issue by
+allowing the use of quoted strings.
+
+Suggested-by: Jo-Philipp Wich <[email protected]>
+Signed-off-by: Stijn Tintel <[email protected]>
+Signed-off-by: Pablo Neira Ayuso <[email protected]>
+---
+ src/parser_bison.y | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/src/parser_bison.y b/src/parser_bison.y
+index 16607bb7..1136ab91 100644
+--- a/src/parser_bison.y
++++ b/src/parser_bison.y
+@@ -2151,7 +2151,14 @@ flowtable_list_expr	:	flowtable_expr_member
+ 			|	flowtable_list_expr	COMMA	opt_newline
+ 			;
+ 
+-flowtable_expr_member	:	STRING
++flowtable_expr_member	:	QUOTED_STRING
++			{
++				$$ = constant_expr_alloc(&@$, &string_type,
++							 BYTEORDER_HOST_ENDIAN,
++							 strlen($1) * BITS_PER_BYTE, $1);
++				xfree($1);
++			}
++			|	STRING
+ 			{
+ 				$$ = constant_expr_alloc(&@$, &string_type,
+ 							 BYTEORDER_HOST_ENDIAN,
+-- 
+2.33.1
+