Merge release-20210518.0-25-g74b10e31a (automated)

14 files changed, 38 insertions, 45 deletions

diff --git a/pkg/tcpip/header/ndp_options.go b/pkg/tcpip/header/ndp_options.go
index 3d1bccd15..d6cad3a94 100644
--- a/pkg/tcpip/header/ndp_options.go
+++ b/pkg/tcpip/header/ndp_options.go
@@ -77,12 +77,12 @@ const (
 
 	// ndpPrefixInformationOnLinkFlagMask is the mask of the On-Link Flag
 	// field in the flags byte within an NDPPrefixInformation.
-	ndpPrefixInformationOnLinkFlagMask = (1 << 7)
+	ndpPrefixInformationOnLinkFlagMask = 1 << 7
 
 	// ndpPrefixInformationAutoAddrConfFlagMask is the mask of the
 	// Autonomous Address-Configuration flag field in the flags byte within
 	// an NDPPrefixInformation.
-	ndpPrefixInformationAutoAddrConfFlagMask = (1 << 6)
+	ndpPrefixInformationAutoAddrConfFlagMask = 1 << 6
 
 	// ndpPrefixInformationReserved1FlagsMask is the mask of the Reserved1
 	// field in the flags byte within an NDPPrefixInformation.
@@ -451,7 +451,7 @@ func (o NDPNonceOption) String() string {
 
 // Nonce returns the nonce value this option holds.
 func (o NDPNonceOption) Nonce() []byte {
-	return []byte(o)
+	return o
 }
 
 // NDPSourceLinkLayerAddressOption is the NDP Source Link Layer Option
diff --git a/pkg/tcpip/link/channel/channel.go b/pkg/tcpip/link/channel/channel.go
index ef9126deb..f26c857eb 100644
--- a/pkg/tcpip/link/channel/channel.go
+++ b/pkg/tcpip/link/channel/channel.go
@@ -288,5 +288,5 @@ func (*Endpoint) ARPHardwareType() header.ARPHardwareType {
 }
 
 // AddHeader implements stack.LinkEndpoint.AddHeader.
-func (e *Endpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
+func (*Endpoint) AddHeader(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) {
 }
diff --git a/pkg/tcpip/network/ipv6/ndp.go b/pkg/tcpip/network/ipv6/ndp.go
index f0ff111c5..11ff36561 100644
--- a/pkg/tcpip/network/ipv6/ndp.go
+++ b/pkg/tcpip/network/ipv6/ndp.go
@@ -1754,7 +1754,7 @@ func (ndp *ndpState) startSolicitingRouters() {
 					header.NDPSourceLinkLayerAddressOption(linkAddress),
 				}
 			}
-			payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize + int(optsSerializer.Length())
+			payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize + optsSerializer.Length()
 			icmpData := header.ICMPv6(buffer.NewView(payloadSize))
 			icmpData.SetType(header.ICMPv6RouterSolicit)
 			rs := header.NDPRouterSolicit(icmpData.MessageBody())
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 916ebef11..72760a4a7 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -40,13 +40,6 @@ import (
 )
 
 const (
-	// ageLimit is set to the same cache stale time used in Linux.
-	ageLimit = 1 * time.Minute
-	// resolutionTimeout is set to the same ARP timeout used in Linux.
-	resolutionTimeout = 1 * time.Second
-	// resolutionAttempts is set to the same ARP retries used in Linux.
-	resolutionAttempts = 3
-
 	// DefaultTOS is the default type of service value for network endpoints.
 	DefaultTOS = 0
 )
diff --git a/pkg/tcpip/transport/icmp/endpoint.go b/pkg/tcpip/transport/icmp/endpoint.go
index 8afde7fca..517903ae7 100644
--- a/pkg/tcpip/transport/icmp/endpoint.go
+++ b/pkg/tcpip/transport/icmp/endpoint.go
@@ -160,7 +160,7 @@ func (e *endpoint) Close() {
 }
 
 // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf.
-func (e *endpoint) ModerateRecvBuf(copied int) {}
+func (*endpoint) ModerateRecvBuf(int) {}
 
 // SetOwner implements tcpip.Endpoint.SetOwner.
 func (e *endpoint) SetOwner(owner tcpip.PacketOwner) {
@@ -349,7 +349,7 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp
 }
 
 // SetSockOpt sets a socket option.
-func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error {
+func (*endpoint) SetSockOpt(tcpip.SettableSocketOption) tcpip.Error {
 	return nil
 }
 
@@ -390,7 +390,7 @@ func (e *endpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, tcpip.Error) {
 }
 
 // GetSockOpt implements tcpip.Endpoint.GetSockOpt.
-func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error {
+func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error {
 	return &tcpip.ErrUnknownProtocolOption{}
 }
 
@@ -606,7 +606,7 @@ func (*endpoint) Accept(*tcpip.FullAddress) (tcpip.Endpoint, *waiter.Queue, tcpi
 	return nil, nil, &tcpip.ErrNotSupported{}
 }
 
-func (e *endpoint) registerWithStack(nicID tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber, id stack.TransportEndpointID) (stack.TransportEndpointID, tcpip.Error) {
+func (e *endpoint) registerWithStack(_ tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber, id stack.TransportEndpointID) (stack.TransportEndpointID, tcpip.Error) {
 	if id.LocalPort != 0 {
 		// The endpoint already has a local port, just attempt to
 		// register it.
diff --git a/pkg/tcpip/transport/packet/endpoint.go b/pkg/tcpip/transport/packet/endpoint.go
index 496eca581..fa703a0ed 100644
--- a/pkg/tcpip/transport/packet/endpoint.go
+++ b/pkg/tcpip/transport/packet/endpoint.go
@@ -159,7 +159,7 @@ func (ep *endpoint) Close() {
 }
 
 // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf.
-func (ep *endpoint) ModerateRecvBuf(copied int) {}
+func (*endpoint) ModerateRecvBuf(int) {}
 
 // Read implements tcpip.Endpoint.Read.
 func (ep *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult, tcpip.Error) {
@@ -220,19 +220,19 @@ func (*endpoint) Disconnect() tcpip.Error {
 
 // Connect implements tcpip.Endpoint.Connect. Packet sockets cannot be
 // connected, and this function always returnes *tcpip.ErrNotSupported.
-func (*endpoint) Connect(addr tcpip.FullAddress) tcpip.Error {
+func (*endpoint) Connect(tcpip.FullAddress) tcpip.Error {
 	return &tcpip.ErrNotSupported{}
 }
 
 // Shutdown implements tcpip.Endpoint.Shutdown. Packet sockets cannot be used
 // with Shutdown, and this function always returns *tcpip.ErrNotSupported.
-func (*endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error {
+func (*endpoint) Shutdown(tcpip.ShutdownFlags) tcpip.Error {
 	return &tcpip.ErrNotSupported{}
 }
 
 // Listen implements tcpip.Endpoint.Listen. Packet sockets cannot be used with
 // Listen, and this function always returns *tcpip.ErrNotSupported.
-func (*endpoint) Listen(backlog int) tcpip.Error {
+func (*endpoint) Listen(int) tcpip.Error {
 	return &tcpip.ErrNotSupported{}
 }
 
@@ -318,7 +318,7 @@ func (ep *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error {
 }
 
 // SetSockOptInt implements tcpip.Endpoint.SetSockOptInt.
-func (ep *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error {
+func (*endpoint) SetSockOptInt(tcpip.SockOptInt, int) tcpip.Error {
 	return &tcpip.ErrUnknownProtocolOption{}
 }
 
@@ -339,7 +339,7 @@ func (ep *endpoint) UpdateLastError(err tcpip.Error) {
 }
 
 // GetSockOpt implements tcpip.Endpoint.GetSockOpt.
-func (ep *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error {
+func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error {
 	return &tcpip.ErrNotSupported{}
 }
 
@@ -484,7 +484,7 @@ func (ep *endpoint) Stats() tcpip.EndpointStats {
 }
 
 // SetOwner implements tcpip.Endpoint.SetOwner.
-func (ep *endpoint) SetOwner(owner tcpip.PacketOwner) {}
+func (*endpoint) SetOwner(tcpip.PacketOwner) {}
 
 // SocketOptions implements tcpip.Endpoint.SocketOptions.
 func (ep *endpoint) SocketOptions() *tcpip.SocketOptions {
diff --git a/pkg/tcpip/transport/raw/endpoint.go b/pkg/tcpip/transport/raw/endpoint.go
index bcec3d2e7..07a585444 100644
--- a/pkg/tcpip/transport/raw/endpoint.go
+++ b/pkg/tcpip/transport/raw/endpoint.go
@@ -183,7 +183,7 @@ func (e *endpoint) Close() {
 }
 
 // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf.
-func (e *endpoint) ModerateRecvBuf(copied int) {}
+func (*endpoint) ModerateRecvBuf(int) {}
 
 func (e *endpoint) SetOwner(owner tcpip.PacketOwner) {
 	e.mu.Lock()
@@ -402,7 +402,7 @@ func (e *endpoint) Connect(addr tcpip.FullAddress) tcpip.Error {
 	}
 
 	// Find a route to the destination.
-	route, err := e.stack.FindRoute(nic, tcpip.Address(""), addr.Addr, e.NetProto, false)
+	route, err := e.stack.FindRoute(nic, "", addr.Addr, e.NetProto, false)
 	if err != nil {
 		return err
 	}
@@ -428,7 +428,7 @@ func (e *endpoint) Connect(addr tcpip.FullAddress) tcpip.Error {
 }
 
 // Shutdown implements tcpip.Endpoint.Shutdown. It's a noop for raw sockets.
-func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error {
+func (e *endpoint) Shutdown(tcpip.ShutdownFlags) tcpip.Error {
 	e.mu.Lock()
 	defer e.mu.Unlock()
 
@@ -439,7 +439,7 @@ func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error {
 }
 
 // Listen implements tcpip.Endpoint.Listen.
-func (*endpoint) Listen(backlog int) tcpip.Error {
+func (*endpoint) Listen(int) tcpip.Error {
 	return &tcpip.ErrNotSupported{}
 }
 
@@ -513,12 +513,12 @@ func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error {
 	}
 }
 
-func (e *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error {
+func (*endpoint) SetSockOptInt(tcpip.SockOptInt, int) tcpip.Error {
 	return &tcpip.ErrUnknownProtocolOption{}
 }
 
 // GetSockOpt implements tcpip.Endpoint.GetSockOpt.
-func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error {
+func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error {
 	return &tcpip.ErrUnknownProtocolOption{}
 }
 
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go
index c6bf1fd98..fb7670adb 100644
--- a/pkg/tcpip/transport/tcp/endpoint.go
+++ b/pkg/tcpip/transport/tcp/endpoint.go
@@ -818,7 +818,7 @@ func newEndpoint(s *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQue
 		},
 		sndQueueInfo: sndQueueInfo{
 			TCPSndBufState: stack.TCPSndBufState{
-				SndMTU: int(math.MaxInt32),
+				SndMTU: math.MaxInt32,
 			},
 		},
 		waiterQueue: waiterQueue,
@@ -2748,7 +2748,7 @@ func (e *endpoint) updateSndBufferUsage(v int) {
 	// We only notify when there is half the sendBufferSize available after
 	// a full buffer event occurs. This ensures that we don't wake up
 	// writers to queue just 1-2 segments and go back to sleep.
-	notify = notify && e.sndQueueInfo.SndBufUsed < int(sendBufferSize)>>1
+	notify = notify && e.sndQueueInfo.SndBufUsed < sendBufferSize>>1
 	e.sndQueueInfo.sndQueueMu.Unlock()
 
 	if notify {
diff --git a/pkg/tcpip/transport/tcp/protocol.go b/pkg/tcpip/transport/tcp/protocol.go
index a3d1aa1a3..d43e21426 100644
--- a/pkg/tcpip/transport/tcp/protocol.go
+++ b/pkg/tcpip/transport/tcp/protocol.go
@@ -401,7 +401,7 @@ func (p *protocol) Option(option tcpip.GettableTransportProtocolOption) tcpip.Er
 
 	case *tcpip.TCPTimeWaitReuseOption:
 		p.mu.RLock()
-		*v = tcpip.TCPTimeWaitReuseOption(p.timeWaitReuse)
+		*v = p.timeWaitReuse
 		p.mu.RUnlock()
 		return nil
 
diff --git a/pkg/tcpip/transport/tcp/rack.go b/pkg/tcpip/transport/tcp/rack.go
index 9e332dcf7..813a6dffd 100644
--- a/pkg/tcpip/transport/tcp/rack.go
+++ b/pkg/tcpip/transport/tcp/rack.go
@@ -279,7 +279,7 @@ func (s *sender) detectTLPRecovery(ack seqnum.Value, rcvdSeg *segment) {
 //   been observed RACK uses reo_wnd of zero during loss recovery, in order to
 //   retransmit quickly, or when the number of DUPACKs exceeds the classic
 //   DUPACKthreshold.
-func (rc *rackControl) updateRACKReorderWindow(ackSeg *segment) {
+func (rc *rackControl) updateRACKReorderWindow() {
 	dsackSeen := rc.DSACKSeen
 	snd := rc.snd
 
diff --git a/pkg/tcpip/transport/tcp/rcv.go b/pkg/tcpip/transport/tcp/rcv.go
index 133371455..4fd8a0624 100644
--- a/pkg/tcpip/transport/tcp/rcv.go
+++ b/pkg/tcpip/transport/tcp/rcv.go
@@ -137,9 +137,9 @@ func (r *receiver) getSendParams() (RcvNxt seqnum.Value, rcvWnd seqnum.Size) {
 	// rcvWUP       RcvNxt         RcvAcc          new RcvAcc
 	//               <=====curWnd ===>
 	//               <========= newWnd > curWnd ========= >
-	if r.RcvNxt.Add(seqnum.Size(curWnd)).LessThan(r.RcvNxt.Add(seqnum.Size(newWnd))) && toGrow {
+	if r.RcvNxt.Add(curWnd).LessThan(r.RcvNxt.Add(newWnd)) && toGrow {
 		// If the new window moves the right edge, then update RcvAcc.
-		r.RcvAcc = r.RcvNxt.Add(seqnum.Size(newWnd))
+		r.RcvAcc = r.RcvNxt.Add(newWnd)
 	} else {
 		if newWnd == 0 {
 			// newWnd is zero but we can't advertise a zero as it would cause window
diff --git a/pkg/tcpip/transport/tcp/segment.go b/pkg/tcpip/transport/tcp/segment.go
index 7e5ba6ef7..61754de29 100644
--- a/pkg/tcpip/transport/tcp/segment.go
+++ b/pkg/tcpip/transport/tcp/segment.go
@@ -243,7 +243,7 @@ func (s *segment) parse(skipChecksumValidation bool) bool {
 		return false
 	}
 
-	s.options = []byte(s.hdr[header.TCPMinimumSize:])
+	s.options = s.hdr[header.TCPMinimumSize:]
 	s.parsedOptions = header.ParseTCPOptions(s.options)
 	if skipChecksumValidation {
 		s.csumValid = true
@@ -262,5 +262,5 @@ func (s *segment) parse(skipChecksumValidation bool) bool {
 
 // sackBlock returns a header.SACKBlock that represents this segment.
 func (s *segment) sackBlock() header.SACKBlock {
-	return header.SACKBlock{s.sequenceNumber, s.sequenceNumber.Add(s.logicalLen())}
+	return header.SACKBlock{Start: s.sequenceNumber, End: s.sequenceNumber.Add(s.logicalLen())}
 }
diff --git a/pkg/tcpip/transport/tcp/snd.go b/pkg/tcpip/transport/tcp/snd.go
index f43e86677..6b7293755 100644
--- a/pkg/tcpip/transport/tcp/snd.go
+++ b/pkg/tcpip/transport/tcp/snd.go
@@ -616,7 +616,7 @@ func (s *sender) NextSeg(nextSegHint *segment) (nextSeg, hint *segment, rescueRt
 		//     'S2' that meets the following 3 criteria for determinig
 		//     loss, the sequence range of one segment of up to SMSS
 		//     octects starting with S2 MUST be returned.
-		if !s.ep.scoreboard.IsSACKED(header.SACKBlock{segSeq, segSeq.Add(1)}) {
+		if !s.ep.scoreboard.IsSACKED(header.SACKBlock{Start: segSeq, End: segSeq.Add(1)}) {
 			// NextSeg():
 			//
 			//    (1.a) S2 is greater than HighRxt
@@ -1024,7 +1024,7 @@ func (s *sender) SetPipe() {
 			if segEnd.LessThan(endSeq) {
 				endSeq = segEnd
 			}
-			sb := header.SACKBlock{startSeq, endSeq}
+			sb := header.SACKBlock{Start: startSeq, End: endSeq}
 			// SetPipe():
 			//
 			// After initializing pipe to zero, the following steps are
@@ -1455,7 +1455,7 @@ func (s *sender) handleRcvdSegment(rcvdSeg *segment) {
 		// See: https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.2
 		// * Upon receiving an ACK:
 		// * Step 4: Update RACK reordering window
-		s.rc.updateRACKReorderWindow(rcvdSeg)
+		s.rc.updateRACKReorderWindow()
 
 		// After the reorder window is calculated, detect any loss by checking
 		// if the time elapsed after the segments are sent is greater than the
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index 54d583fbd..623e069a6 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -291,7 +291,7 @@ func (e *endpoint) Close() {
 }
 
 // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf.
-func (e *endpoint) ModerateRecvBuf(copied int) {}
+func (*endpoint) ModerateRecvBuf(int) {}
 
 // Read implements tcpip.Endpoint.Read.
 func (e *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult, tcpip.Error) {
@@ -802,8 +802,8 @@ func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error {
 	case *tcpip.MulticastInterfaceOption:
 		e.mu.Lock()
 		*o = tcpip.MulticastInterfaceOption{
-			e.multicastNICID,
-			e.multicastAddr,
+			NIC:           e.multicastNICID,
+			InterfaceAddr: e.multicastAddr,
 		}
 		e.mu.Unlock()
 
@@ -1302,12 +1302,12 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB
 		senderAddress: tcpip.FullAddress{
 			NIC:  pkt.NICID,
 			Addr: id.RemoteAddress,
-			Port: header.UDP(hdr).SourcePort(),
+			Port: hdr.SourcePort(),
 		},
 		destinationAddress: tcpip.FullAddress{
 			NIC:  pkt.NICID,
 			Addr: id.LocalAddress,
-			Port: header.UDP(hdr).DestinationPort(),
+			Port: hdr.DestinationPort(),
 		},
 		data: pkt.Data().ExtractVV(),
 	}