Remove deprecated temporary error (#377)

* removed temporary status

* removed unused statuses

src/zdns/conf.go

@@ -38,7 +38,6 @@ const (
 	STATUS_FORMERR   Status = "FORMERR" // Format Error
 	STATUS_SERVFAIL  Status = "SERVFAIL"
 	STATUS_NXDOMAIN  Status = "NXDOMAIN"
-	STATUS_NOTIMP    Status = "NOT_IMPL"
 	STATUS_REFUSED   Status = "REFUSED"
 	STATUS_TRUNCATED Status = "TRUNCATED"
 
@@ -51,9 +50,7 @@ const (
 	STATUS_ILLEGAL_INPUT Status = "ILLEGAL_INPUT"
 	STATUS_TIMEOUT       Status = "TIMEOUT"
 	STATUS_ITER_TIMEOUT  Status = "ITERATIVE_TIMEOUT"
-	STATUS_TEMPORARY     Status = "TEMPORARY"
 	STATUS_NOAUTH        Status = "NOAUTH"
-	STATUS_NODATA        Status = "NODATA"
 )
 
 var RootServers = [...]string{

src/zdns/lookup.go

@@ -291,7 +291,7 @@ func (r *Resolver) retryingLookup(q Question, nameServer string, recursive bool)
 
 	for i := 0; i <= r.retries; i++ {
 		result, status, err := wireLookup(r.udpClient, r.tcpClient, r.conn, q, nameServer, recursive, r.ednsOptions, r.dnsSecEnabled, r.checkingDisabledBit)
-		if (status != STATUS_TIMEOUT && status != STATUS_TEMPORARY) || i == r.retries {
+		if status != STATUS_TIMEOUT || i == r.retries {
 			return result, status, (i + 1), err
 		}
 		if r.udpClient != nil {
@@ -347,8 +347,6 @@ func wireLookup(udp *dns.Client, tcp *dns.Client, conn *dns.Conn, q Question, na
 		if nerr, ok := err.(net.Error); ok {
 			if nerr.Timeout() {
 				return res, STATUS_TIMEOUT, nil
-			} else if nerr.Temporary() {
-				return res, STATUS_TEMPORARY, err
 			}
 		}
 		return res, STATUS_ERROR, err

src/zdns/util.go

@@ -177,8 +177,6 @@ func handleStatus(status *Status, err error) (*Status, error) {
 		return status, nil
 	case STATUS_ILLEGAL_INPUT:
 		return status, nil
-	case STATUS_TEMPORARY:
-		return status, nil
 	default:
 		var s *Status
 		return s, nil