shadowsocks-libev: add connmarktos build option

Signed-off-by: DUPONCHEEL Sébastien <sebastien.duponcheel@corp.ovh.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/shadowsocks-libev/Config.in

@@ -15,6 +15,18 @@ config BR2_PACKAGE_SHADOWSOCKS_LIBEV
 
 	  https://github.com/shadowsocks/shadowsocks-libev
 
+config BR2_PACKAGE_SHADOWSOCKS_LIBEV_CONNMARKTOS
+	bool "conmarktos support in ss-server"
+	depends on BR2_PACKAGE_SHADOWSOCKS_LIBEV
+	select BR2_PACKAGE_LIBNETFILTER_CONNTRACK
+	help
+	  Build ss-server with the connmark to TOS feature.
+
+	  This feature requires advanced tc, iptables and conntrack
+	  rules to perform QoS on the server side.
+
+	  If unsure, don't enable this option
+
 comment "shadowsocks-libev needs a toolchain w/ threads"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on BR2_TOOLCHAIN_HAS_SYNC_8 || !BR2_ARCH_IS_64

package/shadowsocks-libev/shadowsocks-libev.mk

@@ -14,4 +14,10 @@ SHADOWSOCKS_LIBEV_CONF_OPTS = \
 	--with-pcre=$(STAGING_DIR)/usr \
 	--disable-ssp
 
+# --disable option was broken in 3.2.1, it will be fixed in 3.2.2
+ifeq ($(BR2_PACKAGE_SHADOWSOCKS_LIBEV_CONNMARKTOS),y)
+SHADOWSOCKS_LIBEV_DEPENDENCIES += libnetfilter_conntrack
+SHADOWSOCKS_LIBEV_CONF_OPTS += --enable-connmarktos
+endif
+
 $(eval $(autotools-package))