add ppp ipv6 patch by farnz (from #2525)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9508 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/ppp/Makefile

@@ -134,6 +134,8 @@ define Package/ppp/install
 	$(INSTALL_DIR) $(1)/etc/ppp/ip-up.d
 	$(INSTALL_BIN) ./files/etc/ppp/ip-down $(1)/etc/ppp/
 	$(INSTALL_DIR) $(1)/etc/ppp/ip-down.d
+	$(INSTALL_BIN) ./files/etc/ppp/ipv6-up $(1)/etc/ppp/
+	$(INSTALL_BIN) ./files/etc/ppp/ipv6-down $(1)/etc/ppp/
 	$(INSTALL_DATA) ./files/etc/ppp/options $(1)/etc/ppp/
 	ln -sf /tmp/resolv.conf.auto $(1)/etc/ppp/resolv.conf
 endef

package/ppp/files/etc/ppp/ipv6-down

@@ -1,2 +1,16 @@
 #!/bin/sh
-route -A inet6 del $4 dev $1
+
+gw=$4
+dev=$1
+cfg=$6
+
+. /etc/functions.sh      # common functions
+include /lib/network     # include /lib/network/*.sh
+scan_interfaces          # read and parse the network config
+
+config_get_bool defaultroute "$cfg" defaultroute 1
+
+if [ ${defaultroute} -eq 1 ]
+then
+	route -A inet6 del default gw ${gw} dev ${dev}
+fi

package/ppp/files/etc/ppp/ipv6-up

@@ -1,2 +1,16 @@
 #!/bin/sh
-route -A inet6 add default $4 dev $1
+
+gw=$4
+dev=$1
+cfg=$6
+
+. /etc/functions.sh      # common functions
+include /lib/network     # include /lib/network/*.sh
+scan_interfaces          # read and parse the network config
+
+config_get_bool defaultroute "$cfg" defaultroute 1
+
+if [ ${defaultroute} -eq 1 ]
+then
+	route -A inet6 add default gw ${gw} dev ${dev}
+fi

package/ppp/files/ppp.sh

@@ -37,6 +37,10 @@ start_pppd() {
 	
 	config_get demand "$cfg" demand
 	[ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf.auto
+
+	config_get_bool ipv6 "$cfg" ipv6 0
+	[ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
+
 	/usr/sbin/pppd "$@" \
 		${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} \
 		${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
@@ -48,6 +52,7 @@ start_pppd() {
 		ipparam "$cfg" \
 		${connect:+connect "$connect"} \
 		${disconnect:+disconnect "$disconnect"} \
+		${ipv6} \
 		${pppd_options}
 
 	lock -u "/var/lock/ppp-${cfg}"