ds-lite: fix resolve retry for fqdn peeraddrs

If the first resolveip call will fail, peeraddr will be now empty, and
the subsequent resolveip call will try to resolve an empty string.

Fix this by storing the result in a temporary variable.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 45712

package/network/ipv6/ds-lite/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ds-lite
-PKG_VERSION:=6
+PKG_VERSION:=7
 PKG_RELEASE:=1
 PKG_LICENSE:=GPL-2.0
 

package/network/ipv6/ds-lite/files/dslite.sh

@@ -13,6 +13,7 @@ proto_dslite_setup() {
 	local cfg="$1"
 	local iface="$2"
 	local link="ds-$cfg"
+	local remoteip6
 
 	local mtu ttl peeraddr ip6addr tunlink zone weakif
 	json_get_vars mtu ttl peeraddr ip6addr tunlink zone weakif
@@ -25,16 +26,16 @@ proto_dslite_setup() {
 
 	( proto_add_host_dependency "$cfg" "::" "$tunlink" )
 
-	peeraddr=$(resolveip -6 $peeraddr)
+	remoteip6=$(resolveip -6 $peeraddr)
-	if [ -z "$peeraddr" ]; then
+	if [ -z "$remoteip6" ]; then
 		sleep 3
-		peeraddr=$(resolveip -6 $peeraddr)
+		remoteip6=$(resolveip -6 $peeraddr)
-		if [ -z "$peeraddr" ]; then
+		if [ -z "$remoteip6" ]; then
 			proto_notify_error "$cfg" "AFTR_DNS_FAIL"
 			return
 		fi
 	fi
-	peeraddr="${peeraddr%% *}"
+	peeraddr="${remoteip6%% *}"
 
 	[ -z "$ip6addr" ] && {
 		local wanif="$tunlink"