diff --git a/counting.go b/counting.go
index 490b77fd1..d441ed311 100644
--- a/counting.go
+++ b/counting.go
@@ -10,25 +10,25 @@ import (
 
 type countingReader struct {
 	io.Reader
-	tot  uint64 // bytes
-	last int64  // unix nanos
+	tot  int64 // bytes
+	last int64 // unix nanos
 }
 
 var (
-	totalIncoming uint64
-	totalOutgoing uint64
+	totalIncoming int64
+	totalOutgoing int64
 )
 
 func (c *countingReader) Read(bs []byte) (int, error) {
 	n, err := c.Reader.Read(bs)
-	atomic.AddUint64(&c.tot, uint64(n))
-	atomic.AddUint64(&totalIncoming, uint64(n))
+	atomic.AddInt64(&c.tot, int64(n))
+	atomic.AddInt64(&totalIncoming, int64(n))
 	atomic.StoreInt64(&c.last, time.Now().UnixNano())
 	return n, err
 }
 
-func (c *countingReader) Tot() uint64 {
-	return atomic.LoadUint64(&c.tot)
+func (c *countingReader) Tot() int64 {
+	return atomic.LoadInt64(&c.tot)
 }
 
 func (c *countingReader) Last() time.Time {
@@ -37,26 +37,26 @@ func (c *countingReader) Last() time.Time {
 
 type countingWriter struct {
 	io.Writer
-	tot  uint64 // bytes
-	last int64  // unix nanos
+	tot  int64 // bytes
+	last int64 // unix nanos
 }
 
 func (c *countingWriter) Write(bs []byte) (int, error) {
 	n, err := c.Writer.Write(bs)
-	atomic.AddUint64(&c.tot, uint64(n))
-	atomic.AddUint64(&totalOutgoing, uint64(n))
+	atomic.AddInt64(&c.tot, int64(n))
+	atomic.AddInt64(&totalOutgoing, int64(n))
 	atomic.StoreInt64(&c.last, time.Now().UnixNano())
 	return n, err
 }
 
-func (c *countingWriter) Tot() uint64 {
-	return atomic.LoadUint64(&c.tot)
+func (c *countingWriter) Tot() int64 {
+	return atomic.LoadInt64(&c.tot)
 }
 
 func (c *countingWriter) Last() time.Time {
 	return time.Unix(0, atomic.LoadInt64(&c.last))
 }
 
-func TotalInOut() (uint64, uint64) {
-	return atomic.LoadUint64(&totalIncoming), atomic.LoadUint64(&totalOutgoing)
+func TotalInOut() (int64, int64) {
+	return atomic.LoadInt64(&totalIncoming), atomic.LoadInt64(&totalOutgoing)
 }
diff --git a/message.go b/message.go
index d85f21cc6..dbaf526ac 100644
--- a/message.go
+++ b/message.go
@@ -1,6 +1,5 @@
 // Copyright (C) 2014 The Protocol Authors.
 
-//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o message_xdr.go message.go
 
 package protocol
@@ -18,8 +17,8 @@ type FileInfo struct {
 	Name         string // max:8192
 	Flags        uint32
 	Modified     int64
-	Version      uint64
-	LocalVersion uint64
+	Version      int64
+	LocalVersion int64
 	Blocks       []BlockInfo
 }
 
@@ -60,7 +59,7 @@ func (f FileInfo) HasPermissionBits() bool {
 
 type BlockInfo struct {
 	Offset int64 // noencode (cache only)
-	Size   uint32
+	Size   int32
 	Hash   []byte // max:64
 }
 
@@ -71,8 +70,8 @@ func (b BlockInfo) String() string {
 type RequestMessage struct {
 	Folder  string // max:64
 	Name    string // max:8192
-	Offset  uint64
-	Size    uint32
+	Offset  int64
+	Size    int32
 	Hash    []byte // max:64
 	Flags   uint32
 	Options []Option // max:64
@@ -80,7 +79,7 @@ type RequestMessage struct {
 
 type ResponseMessage struct {
 	Data  []byte
-	Error uint32
+	Error int32
 }
 
 type ClusterConfigMessage struct {
@@ -107,7 +106,7 @@ type Folder struct {
 type Device struct {
 	ID              []byte // max:32
 	Flags           uint32
-	MaxLocalVersion uint64
+	MaxLocalVersion int64
 }
 
 type Option struct {
@@ -117,7 +116,7 @@ type Option struct {
 
 type CloseMessage struct {
 	Reason string // max:1024
-	Code   uint32
+	Code   int32
 }
 
 type EmptyMessage struct{}
diff --git a/message_xdr.go b/message_xdr.go
index fa7b5802b..54d030da1 100644
--- a/message_xdr.go
+++ b/message_xdr.go
@@ -168,8 +168,8 @@ struct FileInfo {
 	string Name<8192>;
 	unsigned int Flags;
 	hyper Modified;
-	unsigned hyper Version;
-	unsigned hyper LocalVersion;
+	hyper Version;
+	hyper LocalVersion;
 	BlockInfo Blocks<>;
 }
 
@@ -206,8 +206,8 @@ func (o FileInfo) encodeXDR(xw *xdr.Writer) (int, error) {
 	xw.WriteString(o.Name)
 	xw.WriteUint32(o.Flags)
 	xw.WriteUint64(uint64(o.Modified))
-	xw.WriteUint64(o.Version)
-	xw.WriteUint64(o.LocalVersion)
+	xw.WriteUint64(uint64(o.Version))
+	xw.WriteUint64(uint64(o.LocalVersion))
 	xw.WriteUint32(uint32(len(o.Blocks)))
 	for i := range o.Blocks {
 		_, err := o.Blocks[i].encodeXDR(xw)
@@ -233,8 +233,8 @@ func (o *FileInfo) decodeXDR(xr *xdr.Reader) error {
 	o.Name = xr.ReadStringMax(8192)
 	o.Flags = xr.ReadUint32()
 	o.Modified = int64(xr.ReadUint64())
-	o.Version = xr.ReadUint64()
-	o.LocalVersion = xr.ReadUint64()
+	o.Version = int64(xr.ReadUint64())
+	o.LocalVersion = int64(xr.ReadUint64())
 	_BlocksSize := int(xr.ReadUint32())
 	o.Blocks = make([]BlockInfo, _BlocksSize)
 	for i := range o.Blocks {
@@ -261,7 +261,7 @@ BlockInfo Structure:
 
 
 struct BlockInfo {
-	unsigned int Size;
+	int Size;
 	opaque Hash<64>;
 }
 
@@ -292,7 +292,7 @@ func (o BlockInfo) AppendXDR(bs []byte) ([]byte, error) {
 }
 
 func (o BlockInfo) encodeXDR(xw *xdr.Writer) (int, error) {
-	xw.WriteUint32(o.Size)
+	xw.WriteUint32(uint32(o.Size))
 	if l := len(o.Hash); l > 64 {
 		return xw.Tot(), xdr.ElementSizeExceeded("Hash", l, 64)
 	}
@@ -312,7 +312,7 @@ func (o *BlockInfo) UnmarshalXDR(bs []byte) error {
 }
 
 func (o *BlockInfo) decodeXDR(xr *xdr.Reader) error {
-	o.Size = xr.ReadUint32()
+	o.Size = int32(xr.ReadUint32())
 	o.Hash = xr.ReadBytesMax(64)
 	return xr.Error()
 }
@@ -361,8 +361,8 @@ RequestMessage Structure:
 struct RequestMessage {
 	string Folder<64>;
 	string Name<8192>;
-	unsigned hyper Offset;
-	unsigned int Size;
+	hyper Offset;
+	int Size;
 	opaque Hash<64>;
 	unsigned int Flags;
 	Option Options<64>;
@@ -403,8 +403,8 @@ func (o RequestMessage) encodeXDR(xw *xdr.Writer) (int, error) {
 		return xw.Tot(), xdr.ElementSizeExceeded("Name", l, 8192)
 	}
 	xw.WriteString(o.Name)
-	xw.WriteUint64(o.Offset)
-	xw.WriteUint32(o.Size)
+	xw.WriteUint64(uint64(o.Offset))
+	xw.WriteUint32(uint32(o.Size))
 	if l := len(o.Hash); l > 64 {
 		return xw.Tot(), xdr.ElementSizeExceeded("Hash", l, 64)
 	}
@@ -437,8 +437,8 @@ func (o *RequestMessage) UnmarshalXDR(bs []byte) error {
 func (o *RequestMessage) decodeXDR(xr *xdr.Reader) error {
 	o.Folder = xr.ReadStringMax(64)
 	o.Name = xr.ReadStringMax(8192)
-	o.Offset = xr.ReadUint64()
-	o.Size = xr.ReadUint32()
+	o.Offset = int64(xr.ReadUint64())
+	o.Size = int32(xr.ReadUint32())
 	o.Hash = xr.ReadBytesMax(64)
 	o.Flags = xr.ReadUint32()
 	_OptionsSize := int(xr.ReadUint32())
@@ -471,7 +471,7 @@ ResponseMessage Structure:
 
 struct ResponseMessage {
 	opaque Data<>;
-	unsigned int Error;
+	int Error;
 }
 
 */
@@ -502,7 +502,7 @@ func (o ResponseMessage) AppendXDR(bs []byte) ([]byte, error) {
 
 func (o ResponseMessage) encodeXDR(xw *xdr.Writer) (int, error) {
 	xw.WriteBytes(o.Data)
-	xw.WriteUint32(o.Error)
+	xw.WriteUint32(uint32(o.Error))
 	return xw.Tot(), xw.Error()
 }
 
@@ -519,7 +519,7 @@ func (o *ResponseMessage) UnmarshalXDR(bs []byte) error {
 
 func (o *ResponseMessage) decodeXDR(xr *xdr.Reader) error {
 	o.Data = xr.ReadBytes()
-	o.Error = xr.ReadUint32()
+	o.Error = int32(xr.ReadUint32())
 	return xr.Error()
 }
 
@@ -766,7 +766,7 @@ Device Structure:
 struct Device {
 	opaque ID<32>;
 	unsigned int Flags;
-	unsigned hyper MaxLocalVersion;
+	hyper MaxLocalVersion;
 }
 
 */
@@ -801,7 +801,7 @@ func (o Device) encodeXDR(xw *xdr.Writer) (int, error) {
 	}
 	xw.WriteBytes(o.ID)
 	xw.WriteUint32(o.Flags)
-	xw.WriteUint64(o.MaxLocalVersion)
+	xw.WriteUint64(uint64(o.MaxLocalVersion))
 	return xw.Tot(), xw.Error()
 }
 
@@ -819,7 +819,7 @@ func (o *Device) UnmarshalXDR(bs []byte) error {
 func (o *Device) decodeXDR(xr *xdr.Reader) error {
 	o.ID = xr.ReadBytesMax(32)
 	o.Flags = xr.ReadUint32()
-	o.MaxLocalVersion = xr.ReadUint64()
+	o.MaxLocalVersion = int64(xr.ReadUint64())
 	return xr.Error()
 }
 
@@ -923,7 +923,7 @@ CloseMessage Structure:
 
 struct CloseMessage {
 	string Reason<1024>;
-	unsigned int Code;
+	int Code;
 }
 
 */
@@ -957,7 +957,7 @@ func (o CloseMessage) encodeXDR(xw *xdr.Writer) (int, error) {
 		return xw.Tot(), xdr.ElementSizeExceeded("Reason", l, 1024)
 	}
 	xw.WriteString(o.Reason)
-	xw.WriteUint32(o.Code)
+	xw.WriteUint32(uint32(o.Code))
 	return xw.Tot(), xw.Error()
 }
 
@@ -974,7 +974,7 @@ func (o *CloseMessage) UnmarshalXDR(bs []byte) error {
 
 func (o *CloseMessage) decodeXDR(xr *xdr.Reader) error {
 	o.Reason = xr.ReadStringMax(1024)
-	o.Code = xr.ReadUint32()
+	o.Code = int32(xr.ReadUint32())
 	return xr.Error()
 }
 
diff --git a/protocol.go b/protocol.go
index 7cf59af1f..eeaf0f46b 100644
--- a/protocol.go
+++ b/protocol.go
@@ -222,8 +222,8 @@ func (c *rawConnection) Request(folder string, name string, offset int64, size i
 	ok := c.send(id, messageTypeRequest, RequestMessage{
 		Folder: folder,
 		Name:   name,
-		Offset: uint64(offset),
-		Size:   uint32(size),
+		Offset: offset,
+		Size:   int32(size),
 	})
 	if !ok {
 		return nil, ErrClosed
@@ -706,8 +706,8 @@ func (c *rawConnection) pingerLoop() {
 
 type Statistics struct {
 	At            time.Time
-	InBytesTotal  uint64
-	OutBytesTotal uint64
+	InBytesTotal  int64
+	OutBytesTotal int64
 }
 
 func (c *rawConnection) Statistics() Statistics {