6 files changed, 460 insertions, 18 deletions
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go
index 3d93a2cd0..74e70e283 100644
--- a/pkg/tcpip/network/ipv4/icmp.go
+++ b/pkg/tcpip/network/ipv4/icmp.go
@@ -23,11 +23,108 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 
+// icmpv4DestinationUnreachableSockError is a general ICMPv4 Destination
+// Unreachable error.
+//
+// +stateify savable
+type icmpv4DestinationUnreachableSockError struct{}
+
+// Origin implements tcpip.SockErrorCause.
+func (*icmpv4DestinationUnreachableSockError) Origin() tcpip.SockErrOrigin {
+	return tcpip.SockExtErrorOriginICMP
+}
+
+// Type implements tcpip.SockErrorCause.
+func (*icmpv4DestinationUnreachableSockError) Type() uint8 {
+	return uint8(header.ICMPv4DstUnreachable)
+}
+
+// Info implements tcpip.SockErrorCause.
+func (*icmpv4DestinationUnreachableSockError) Info() uint32 {
+	return 0
+}
+
+var _ stack.TransportError = (*icmpv4DestinationHostUnreachableSockError)(nil)
+
+// icmpv4DestinationHostUnreachableSockError is an ICMPv4 Destination Host
+// Unreachable error.
+//
+// It indicates that a packet was not able to reach the destination host.
+//
+// +stateify savable
+type icmpv4DestinationHostUnreachableSockError struct {
+	icmpv4DestinationUnreachableSockError
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv4DestinationHostUnreachableSockError) Code() uint8 {
+	return uint8(header.ICMPv4HostUnreachable)
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv4DestinationHostUnreachableSockError) Kind() stack.TransportErrorKind {
+	return stack.DestinationHostUnreachableTransportError
+}
+
+var _ stack.TransportError = (*icmpv4DestinationPortUnreachableSockError)(nil)
+
+// icmpv4DestinationPortUnreachableSockError is an ICMPv4 Destination Port
+// Unreachable error.
+//
+// It indicates that a packet reached the destination host, but the transport
+// protocol was not active on the destination port.
+//
+// +stateify savable
+type icmpv4DestinationPortUnreachableSockError struct {
+	icmpv4DestinationUnreachableSockError
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv4DestinationPortUnreachableSockError) Code() uint8 {
+	return uint8(header.ICMPv4PortUnreachable)
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv4DestinationPortUnreachableSockError) Kind() stack.TransportErrorKind {
+	return stack.DestinationPortUnreachableTransportError
+}
+
+var _ stack.TransportError = (*icmpv4FragmentationNeededSockError)(nil)
+
+// icmpv4FragmentationNeededSockError is an ICMPv4 Destination Unreachable error
+// due to fragmentation being required but the packet was set to not be
+// fragmented.
+//
+// It indicates that a link exists on the path to the destination with an MTU
+// that is too small to carry the packet.
+//
+// +stateify savable
+type icmpv4FragmentationNeededSockError struct {
+	icmpv4DestinationUnreachableSockError
+
+	mtu uint32
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv4FragmentationNeededSockError) Code() uint8 {
+	return uint8(header.ICMPv4FragmentationNeeded)
+}
+
+// Info implements tcpip.SockErrorCause.
+func (e *icmpv4FragmentationNeededSockError) Info() uint32 {
+	return e.mtu
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv4FragmentationNeededSockError) Kind() stack.TransportErrorKind {
+	return stack.PacketTooBigTransportError
+}
+
 // handleControl handles the case when an ICMP error packet contains the headers
 // of the original packet that caused the ICMP one to be sent. This information
 // is used to find out which transport endpoint must be notified about the ICMP
 // packet. We only expect the payload, not the enclosing ICMP packet.
-func (e *endpoint) handleControl(typ stack.ControlType, extra uint32, pkt *stack.PacketBuffer) {
+func (e *endpoint) handleControl(errInfo stack.TransportError, pkt *stack.PacketBuffer) {
 	h, ok := pkt.Data.PullUp(header.IPv4MinimumSize)
 	if !ok {
 		return
@@ -54,10 +151,10 @@ func (e *endpoint) handleControl(typ stack.ControlType, extra uint32, pkt *stack
 		return
 	}
 
-	// Skip the ip header, then deliver control message.
+	// Skip the ip header, then deliver the error.
 	pkt.Data.TrimFront(hlen)
 	p := hdr.TransportProtocol()
-	e.dispatcher.DeliverTransportControlPacket(srcAddr, hdr.DestinationAddress(), ProtocolNumber, p, typ, extra, pkt)
+	e.dispatcher.DeliverTransportError(srcAddr, hdr.DestinationAddress(), ProtocolNumber, p, errInfo, pkt)
 }
 
 func (e *endpoint) handleICMP(pkt *stack.PacketBuffer) {
@@ -222,19 +319,16 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer) {
 		pkt.Data.TrimFront(header.ICMPv4MinimumSize)
 		switch h.Code() {
 		case header.ICMPv4HostUnreachable:
-			e.handleControl(stack.ControlNoRoute, 0, pkt)
-
+			e.handleControl(&icmpv4DestinationHostUnreachableSockError{}, pkt)
 		case header.ICMPv4PortUnreachable:
-			e.handleControl(stack.ControlPortUnreachable, 0, pkt)
-
+			e.handleControl(&icmpv4DestinationPortUnreachableSockError{}, pkt)
 		case header.ICMPv4FragmentationNeeded:
 			networkMTU, err := calculateNetworkMTU(uint32(h.MTU()), header.IPv4MinimumSize)
 			if err != nil {
 				networkMTU = 0
 			}
-			e.handleControl(stack.ControlPacketTooBig, networkMTU, pkt)
+			e.handleControl(&icmpv4FragmentationNeededSockError{mtu: networkMTU}, pkt)
 		}
-
 	case header.ICMPv4SrcQuench:
 		received.srcQuench.Increment()
 
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index e146844c2..b2d626107 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -101,7 +101,7 @@ func (e *endpoint) HandleLinkResolutionFailure(pkt *stack.PacketBuffer) {
 	// Use the same control type as an ICMPv4 destination host unreachable error
 	// since the host is considered unreachable if we cannot resolve the link
 	// address to the next hop.
-	e.handleControl(stack.ControlNoRoute, 0, pkt)
+	e.handleControl(&icmpv4DestinationHostUnreachableSockError{}, pkt)
 }
 
 // NewEndpoint creates a new ipv4 endpoint.
diff --git a/pkg/tcpip/network/ipv4/ipv4_state_autogen.go b/pkg/tcpip/network/ipv4/ipv4_state_autogen.go
index 250b2128e..87a48e2ce 100644
--- a/pkg/tcpip/network/ipv4/ipv4_state_autogen.go
+++ b/pkg/tcpip/network/ipv4/ipv4_state_autogen.go
@@ -1,3 +1,105 @@
 // automatically generated by stateify.
 
 package ipv4
+
+import (
+	"gvisor.dev/gvisor/pkg/state"
+)
+
+func (i *icmpv4DestinationUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv4.icmpv4DestinationUnreachableSockError"
+}
+
+func (i *icmpv4DestinationUnreachableSockError) StateFields() []string {
+	return []string{}
+}
+
+func (i *icmpv4DestinationUnreachableSockError) beforeSave() {}
+
+func (i *icmpv4DestinationUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+}
+
+func (i *icmpv4DestinationUnreachableSockError) afterLoad() {}
+
+func (i *icmpv4DestinationUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+}
+
+func (i *icmpv4DestinationHostUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv4.icmpv4DestinationHostUnreachableSockError"
+}
+
+func (i *icmpv4DestinationHostUnreachableSockError) StateFields() []string {
+	return []string{
+		"icmpv4DestinationUnreachableSockError",
+	}
+}
+
+func (i *icmpv4DestinationHostUnreachableSockError) beforeSave() {}
+
+func (i *icmpv4DestinationHostUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+	stateSinkObject.Save(0, &i.icmpv4DestinationUnreachableSockError)
+}
+
+func (i *icmpv4DestinationHostUnreachableSockError) afterLoad() {}
+
+func (i *icmpv4DestinationHostUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &i.icmpv4DestinationUnreachableSockError)
+}
+
+func (i *icmpv4DestinationPortUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv4.icmpv4DestinationPortUnreachableSockError"
+}
+
+func (i *icmpv4DestinationPortUnreachableSockError) StateFields() []string {
+	return []string{
+		"icmpv4DestinationUnreachableSockError",
+	}
+}
+
+func (i *icmpv4DestinationPortUnreachableSockError) beforeSave() {}
+
+func (i *icmpv4DestinationPortUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+	stateSinkObject.Save(0, &i.icmpv4DestinationUnreachableSockError)
+}
+
+func (i *icmpv4DestinationPortUnreachableSockError) afterLoad() {}
+
+func (i *icmpv4DestinationPortUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &i.icmpv4DestinationUnreachableSockError)
+}
+
+func (e *icmpv4FragmentationNeededSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv4.icmpv4FragmentationNeededSockError"
+}
+
+func (e *icmpv4FragmentationNeededSockError) StateFields() []string {
+	return []string{
+		"icmpv4DestinationUnreachableSockError",
+		"mtu",
+	}
+}
+
+func (e *icmpv4FragmentationNeededSockError) beforeSave() {}
+
+func (e *icmpv4FragmentationNeededSockError) StateSave(stateSinkObject state.Sink) {
+	e.beforeSave()
+	stateSinkObject.Save(0, &e.icmpv4DestinationUnreachableSockError)
+	stateSinkObject.Save(1, &e.mtu)
+}
+
+func (e *icmpv4FragmentationNeededSockError) afterLoad() {}
+
+func (e *icmpv4FragmentationNeededSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &e.icmpv4DestinationUnreachableSockError)
+	stateSourceObject.Load(1, &e.mtu)
+}
+
+func init() {
+	state.Register((*icmpv4DestinationUnreachableSockError)(nil))
+	state.Register((*icmpv4DestinationHostUnreachableSockError)(nil))
+	state.Register((*icmpv4DestinationPortUnreachableSockError)(nil))
+	state.Register((*icmpv4FragmentationNeededSockError)(nil))
+}
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go
index 12e5ead5e..dcfd93bab 100644
--- a/pkg/tcpip/network/ipv6/icmp.go
+++ b/pkg/tcpip/network/ipv6/icmp.go
@@ -23,11 +23,136 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 
+// icmpv6DestinationUnreachableSockError is a general ICMPv6 Destination
+// Unreachable error.
+//
+// +stateify savable
+type icmpv6DestinationUnreachableSockError struct{}
+
+// Origin implements tcpip.SockErrorCause.
+func (*icmpv6DestinationUnreachableSockError) Origin() tcpip.SockErrOrigin {
+	return tcpip.SockExtErrorOriginICMP6
+}
+
+// Type implements tcpip.SockErrorCause.
+func (*icmpv6DestinationUnreachableSockError) Type() uint8 {
+	return uint8(header.ICMPv6DstUnreachable)
+}
+
+// Info implements tcpip.SockErrorCause.
+func (*icmpv6DestinationUnreachableSockError) Info() uint32 {
+	return 0
+}
+
+var _ stack.TransportError = (*icmpv6DestinationNetworkUnreachableSockError)(nil)
+
+// icmpv6DestinationNetworkUnreachableSockError is an ICMPv6 Destination Network
+// Unreachable error.
+//
+// It indicates that the destination network is unreachable.
+//
+// +stateify savable
+type icmpv6DestinationNetworkUnreachableSockError struct {
+	icmpv6DestinationUnreachableSockError
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv6DestinationNetworkUnreachableSockError) Code() uint8 {
+	return uint8(header.ICMPv6NetworkUnreachable)
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv6DestinationNetworkUnreachableSockError) Kind() stack.TransportErrorKind {
+	return stack.DestinationNetworkUnreachableTransportError
+}
+
+var _ stack.TransportError = (*icmpv6DestinationPortUnreachableSockError)(nil)
+
+// icmpv6DestinationPortUnreachableSockError is an ICMPv6 Destination Port
+// Unreachable error.
+//
+// It indicates that a packet reached the destination host, but the transport
+// protocol was not active on the destination port.
+//
+// +stateify savable
+type icmpv6DestinationPortUnreachableSockError struct {
+	icmpv6DestinationUnreachableSockError
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv6DestinationPortUnreachableSockError) Code() uint8 {
+	return uint8(header.ICMPv6PortUnreachable)
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv6DestinationPortUnreachableSockError) Kind() stack.TransportErrorKind {
+	return stack.DestinationPortUnreachableTransportError
+}
+
+var _ stack.TransportError = (*icmpv6DestinationAddressUnreachableSockError)(nil)
+
+// icmpv6DestinationAddressUnreachableSockError is an ICMPv6 Destination Address
+// Unreachable error.
+//
+// It indicates that a packet was not able to reach the destination.
+//
+// +stateify savable
+type icmpv6DestinationAddressUnreachableSockError struct {
+	icmpv6DestinationUnreachableSockError
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv6DestinationAddressUnreachableSockError) Code() uint8 {
+	return uint8(header.ICMPv6AddressUnreachable)
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv6DestinationAddressUnreachableSockError) Kind() stack.TransportErrorKind {
+	return stack.DestinationHostUnreachableTransportError
+}
+
+var _ stack.TransportError = (*icmpv6PacketTooBigSockError)(nil)
+
+// icmpv6PacketTooBigSockError is an ICMPv6 Packet Too Big error.
+//
+// It indicates that a link exists on the path to the destination with an MTU
+// that is too small to carry the packet.
+//
+// +stateify savable
+type icmpv6PacketTooBigSockError struct {
+	mtu uint32
+}
+
+// Origin implements tcpip.SockErrorCause.
+func (*icmpv6PacketTooBigSockError) Origin() tcpip.SockErrOrigin {
+	return tcpip.SockExtErrorOriginICMP6
+}
+
+// Type implements tcpip.SockErrorCause.
+func (*icmpv6PacketTooBigSockError) Type() uint8 {
+	return uint8(header.ICMPv6PacketTooBig)
+}
+
+// Code implements tcpip.SockErrorCause.
+func (*icmpv6PacketTooBigSockError) Code() uint8 {
+	return uint8(header.ICMPv6UnusedCode)
+}
+
+// Info implements tcpip.SockErrorCause.
+func (e *icmpv6PacketTooBigSockError) Info() uint32 {
+	return e.mtu
+}
+
+// Kind implements stack.TransportError.
+func (*icmpv6PacketTooBigSockError) Kind() stack.TransportErrorKind {
+	return stack.PacketTooBigTransportError
+}
+
 // handleControl handles the case when an ICMP packet contains the headers of
 // the original packet that caused the ICMP one to be sent. This information is
 // used to find out which transport endpoint must be notified about the ICMP
 // packet.
-func (e *endpoint) handleControl(typ stack.ControlType, extra uint32, pkt *stack.PacketBuffer) {
+func (e *endpoint) handleControl(transErr stack.TransportError, pkt *stack.PacketBuffer) {
 	h, ok := pkt.Data.PullUp(header.IPv6MinimumSize)
 	if !ok {
 		return
@@ -67,8 +192,7 @@ func (e *endpoint) handleControl(typ stack.ControlType, extra uint32, pkt *stack
 		p = fragHdr.TransportProtocol()
 	}
 
-	// Deliver the control packet to the transport endpoint.
-	e.dispatcher.DeliverTransportControlPacket(src, hdr.DestinationAddress(), ProtocolNumber, p, typ, extra, pkt)
+	e.dispatcher.DeliverTransportError(src, hdr.DestinationAddress(), ProtocolNumber, p, transErr, pkt)
 }
 
 // getLinkAddrOption searches NDP options for a given link address option using
@@ -175,7 +299,7 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer, hasFragmentHeader bool) {
 		if err != nil {
 			networkMTU = 0
 		}
-		e.handleControl(stack.ControlPacketTooBig, networkMTU, pkt)
+		e.handleControl(&icmpv6PacketTooBigSockError{mtu: networkMTU}, pkt)
 
 	case header.ICMPv6DstUnreachable:
 		received.dstUnreachable.Increment()
@@ -187,11 +311,10 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer, hasFragmentHeader bool) {
 		pkt.Data.TrimFront(header.ICMPv6DstUnreachableMinimumSize)
 		switch header.ICMPv6(hdr).Code() {
 		case header.ICMPv6NetworkUnreachable:
-			e.handleControl(stack.ControlNetworkUnreachable, 0, pkt)
+			e.handleControl(&icmpv6DestinationNetworkUnreachableSockError{}, pkt)
 		case header.ICMPv6PortUnreachable:
-			e.handleControl(stack.ControlPortUnreachable, 0, pkt)
+			e.handleControl(&icmpv6DestinationPortUnreachableSockError{}, pkt)
 		}
-
 	case header.ICMPv6NeighborSolicit:
 		received.neighborSolicit.Increment()
 		if !isNDPValid() || pkt.Data.Size() < header.ICMPv6NeighborSolicitMinimumSize {
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index e56eb5796..c2e8c3ea7 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -235,7 +235,7 @@ func (e *endpoint) HandleLinkResolutionFailure(pkt *stack.PacketBuffer) {
 	})
 	pkt.NICID = e.nic.ID()
 	pkt.NetworkProtocolNumber = ProtocolNumber
-	e.handleControl(stack.ControlAddressUnreachable, 0, pkt)
+	e.handleControl(&icmpv6DestinationAddressUnreachableSockError{}, pkt)
 }
 
 // onAddressAssignedLocked handles an address being assigned.
diff --git a/pkg/tcpip/network/ipv6/ipv6_state_autogen.go b/pkg/tcpip/network/ipv6/ipv6_state_autogen.go
index 40c67d440..675fdc220 100644
--- a/pkg/tcpip/network/ipv6/ipv6_state_autogen.go
+++ b/pkg/tcpip/network/ipv6/ipv6_state_autogen.go
@@ -1,3 +1,126 @@
 // automatically generated by stateify.
 
 package ipv6
+
+import (
+	"gvisor.dev/gvisor/pkg/state"
+)
+
+func (i *icmpv6DestinationUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv6.icmpv6DestinationUnreachableSockError"
+}
+
+func (i *icmpv6DestinationUnreachableSockError) StateFields() []string {
+	return []string{}
+}
+
+func (i *icmpv6DestinationUnreachableSockError) beforeSave() {}
+
+func (i *icmpv6DestinationUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+}
+
+func (i *icmpv6DestinationUnreachableSockError) afterLoad() {}
+
+func (i *icmpv6DestinationUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv6.icmpv6DestinationNetworkUnreachableSockError"
+}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) StateFields() []string {
+	return []string{
+		"icmpv6DestinationUnreachableSockError",
+	}
+}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) beforeSave() {}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+	stateSinkObject.Save(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) afterLoad() {}
+
+func (i *icmpv6DestinationNetworkUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (i *icmpv6DestinationPortUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv6.icmpv6DestinationPortUnreachableSockError"
+}
+
+func (i *icmpv6DestinationPortUnreachableSockError) StateFields() []string {
+	return []string{
+		"icmpv6DestinationUnreachableSockError",
+	}
+}
+
+func (i *icmpv6DestinationPortUnreachableSockError) beforeSave() {}
+
+func (i *icmpv6DestinationPortUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+	stateSinkObject.Save(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (i *icmpv6DestinationPortUnreachableSockError) afterLoad() {}
+
+func (i *icmpv6DestinationPortUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv6.icmpv6DestinationAddressUnreachableSockError"
+}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) StateFields() []string {
+	return []string{
+		"icmpv6DestinationUnreachableSockError",
+	}
+}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) beforeSave() {}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) StateSave(stateSinkObject state.Sink) {
+	i.beforeSave()
+	stateSinkObject.Save(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) afterLoad() {}
+
+func (i *icmpv6DestinationAddressUnreachableSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &i.icmpv6DestinationUnreachableSockError)
+}
+
+func (e *icmpv6PacketTooBigSockError) StateTypeName() string {
+	return "pkg/tcpip/network/ipv6.icmpv6PacketTooBigSockError"
+}
+
+func (e *icmpv6PacketTooBigSockError) StateFields() []string {
+	return []string{
+		"mtu",
+	}
+}
+
+func (e *icmpv6PacketTooBigSockError) beforeSave() {}
+
+func (e *icmpv6PacketTooBigSockError) StateSave(stateSinkObject state.Sink) {
+	e.beforeSave()
+	stateSinkObject.Save(0, &e.mtu)
+}
+
+func (e *icmpv6PacketTooBigSockError) afterLoad() {}
+
+func (e *icmpv6PacketTooBigSockError) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &e.mtu)
+}
+
+func init() {
+	state.Register((*icmpv6DestinationUnreachableSockError)(nil))
+	state.Register((*icmpv6DestinationNetworkUnreachableSockError)(nil))
+	state.Register((*icmpv6DestinationPortUnreachableSockError)(nil))
+	state.Register((*icmpv6DestinationAddressUnreachableSockError)(nil))
+	state.Register((*icmpv6PacketTooBigSockError)(nil))
+}