ppp: allow auto-detecting and creation of ipv6 subinterface

this makes ipv6 with ppp a bit more comfortable

Signed-off-by: Steven Barth <steven@midlink.org>

SVN-Revision: 42854

package/network/services/ppp/Makefile

@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=ppp
 PKG_VERSION:=2.4.7
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=ftp://ftp.samba.org/pub/ppp/

package/network/services/ppp/files/lib/netifd/ppp-up

@@ -19,3 +19,12 @@ proto_send_update "$PPP_IPPARAM"
 		[ -x "$SCRIPT" ] && "$SCRIPT" "$@"
 	done
 }
+
+if [ -n "$IPV6IFACE" -a "$(ifstatus $IPV6IFACE | jsonfilter -e @.device)" != "$IFNAME" ]; then
+	json_init
+	json_add_string name "${PPP_IPPARAM}_dhcpv6"
+	json_add_string ifname "@$PPP_IPPARAM"
+	json_add_string proto "dhcpv6"
+	json_close_object
+	ubus call network add_dynamic "$(json_dump)"
+fi

package/network/services/ppp/files/ppp.sh

@@ -16,7 +16,7 @@ ppp_generic_init_config() {
 	proto_config_add_string pppd_options
 	proto_config_add_string 'connect:file'
 	proto_config_add_string 'disconnect:file'
-	proto_config_add_boolean ipv6
+	proto_config_add_string ipv6
 	proto_config_add_boolean authfail
 	proto_config_add_int mtu
 	proto_config_add_string pppname
@@ -28,9 +28,11 @@ ppp_generic_setup() {
 	json_get_vars ipv6 demand keepalive username password pppd_options pppname
 	if [ "$ipv6" = 0 ]; then
 		ipv6=""
-	else
+	elif [ -z "$ipv6" -o "$ipv6" = auto ]; then
 		ipv6=1
+		proto_export "IPV6IFACE=${config}6"
 	fi
+
 	if [ "${demand:-0}" -gt 0 ]; then
 		demand="precompiled-active-filter /etc/ppp/filter demand idle $demand"
 	else