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-rw-r--r--pkg/tcpip/network/arp/arp.go2
-rw-r--r--pkg/tcpip/network/internal/ip/duplicate_address_detection.go17
-rw-r--r--pkg/tcpip/network/ipv6/icmp.go2
-rw-r--r--pkg/tcpip/network/ipv6/ipv6.go47
-rw-r--r--pkg/tcpip/network/ipv6/ndp.go56
-rw-r--r--pkg/tcpip/stack/registration.go40
6 files changed, 91 insertions, 73 deletions
diff --git a/pkg/tcpip/network/arp/arp.go b/pkg/tcpip/network/arp/arp.go
index 3fcdea119..98ded525c 100644
--- a/pkg/tcpip/network/arp/arp.go
+++ b/pkg/tcpip/network/arp/arp.go
@@ -232,7 +232,7 @@ func (e *endpoint) HandlePacket(pkt *stack.PacketBuffer) {
linkAddr := tcpip.LinkAddress(h.HardwareAddressSender())
e.mu.Lock()
- e.mu.dad.StopLocked(addr, false /* aborted */)
+ e.mu.dad.StopLocked(addr, &stack.DADDupAddrDetected{})
e.mu.Unlock()
// The solicited, override, and isRouter flags are not available for ARP;
diff --git a/pkg/tcpip/network/internal/ip/duplicate_address_detection.go b/pkg/tcpip/network/internal/ip/duplicate_address_detection.go
index 6f89a6a16..0053646ee 100644
--- a/pkg/tcpip/network/internal/ip/duplicate_address_detection.go
+++ b/pkg/tcpip/network/internal/ip/duplicate_address_detection.go
@@ -126,9 +126,12 @@ func (d *DAD) CheckDuplicateAddressLocked(addr tcpip.Address, h stack.DADComplet
s.timer.Stop()
delete(d.addresses, addr)
- r := stack.DADResult{Resolved: dadDone, Err: err}
+ var res stack.DADResult = &stack.DADSucceeded{}
+ if err != nil {
+ res = &stack.DADError{Err: err}
+ }
for _, h := range s.completionHandlers {
- h(r)
+ h(res)
}
}),
}
@@ -142,7 +145,7 @@ func (d *DAD) CheckDuplicateAddressLocked(addr tcpip.Address, h stack.DADComplet
// StopLocked stops a currently running DAD process.
//
// Precondition: d.protocolMU must be locked.
-func (d *DAD) StopLocked(addr tcpip.Address, aborted bool) {
+func (d *DAD) StopLocked(addr tcpip.Address, reason stack.DADResult) {
s, ok := d.addresses[addr]
if !ok {
return
@@ -152,14 +155,8 @@ func (d *DAD) StopLocked(addr tcpip.Address, aborted bool) {
s.timer.Stop()
delete(d.addresses, addr)
- var err tcpip.Error
- if aborted {
- err = &tcpip.ErrAborted{}
- }
-
- r := stack.DADResult{Resolved: false, Err: err}
for _, h := range s.completionHandlers {
- h(r)
+ h(reason)
}
}
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go
index e80e681da..1cebe75ec 100644
--- a/pkg/tcpip/network/ipv6/icmp.go
+++ b/pkg/tcpip/network/ipv6/icmp.go
@@ -564,7 +564,7 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer, hasFragmentHeader bool, r
targetAddr := na.TargetAddress()
e.dad.mu.Lock()
- e.dad.mu.dad.StopLocked(targetAddr, false /* aborted */)
+ e.dad.mu.dad.StopLocked(targetAddr, &stack.DADDupAddrDetected{})
e.dad.mu.Unlock()
if e.hasTentativeAddr(targetAddr) {
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index 544717678..d9ab240b6 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -363,7 +363,7 @@ func (e *endpoint) dupTentativeAddrDetected(addr tcpip.Address) tcpip.Error {
// If the address is a SLAAC address, do not invalidate its SLAAC prefix as an
// attempt will be made to generate a new address for it.
- if err := e.removePermanentEndpointLocked(addressEndpoint, false /* allowSLAACInvalidation */, true /* dadFailure */); err != nil {
+ if err := e.removePermanentEndpointLocked(addressEndpoint, false /* allowSLAACInvalidation */, &stack.DADDupAddrDetected{}); err != nil {
return err
}
@@ -536,8 +536,20 @@ func (e *endpoint) disableLocked() {
}
e.mu.ndp.stopSolicitingRouters()
+ // Stop DAD for all the tentative unicast addresses.
+ e.mu.addressableEndpointState.ForEachEndpoint(func(addressEndpoint stack.AddressEndpoint) bool {
+ if addressEndpoint.GetKind() != stack.PermanentTentative {
+ return true
+ }
+
+ addr := addressEndpoint.AddressWithPrefix().Address
+ if header.IsV6UnicastAddress(addr) {
+ e.mu.ndp.stopDuplicateAddressDetection(addr, &stack.DADAborted{})
+ }
+
+ return true
+ })
e.mu.ndp.cleanupState(false /* hostOnly */)
- e.stopDADForPermanentAddressesLocked()
// The endpoint may have already left the multicast group.
switch err := e.leaveGroupLocked(header.IPv6AllNodesMulticastAddress); err.(type) {
@@ -555,25 +567,6 @@ func (e *endpoint) disableLocked() {
}
}
-// stopDADForPermanentAddressesLocked stops DAD for all permaneent addresses.
-//
-// Precondition: e.mu must be write locked.
-func (e *endpoint) stopDADForPermanentAddressesLocked() {
- // Stop DAD for all the tentative unicast addresses.
- e.mu.addressableEndpointState.ForEachEndpoint(func(addressEndpoint stack.AddressEndpoint) bool {
- if addressEndpoint.GetKind() != stack.PermanentTentative {
- return true
- }
-
- addr := addressEndpoint.AddressWithPrefix().Address
- if header.IsV6UnicastAddress(addr) {
- e.mu.ndp.stopDuplicateAddressDetection(addr, false /* failed */)
- }
-
- return true
- })
-}
-
// DefaultTTL is the default hop limit for this endpoint.
func (e *endpoint) DefaultTTL() uint8 {
return e.protocol.DefaultTTL()
@@ -1384,8 +1377,6 @@ func (e *endpoint) handlePacket(pkt *stack.PacketBuffer) {
func (e *endpoint) Close() {
e.mu.Lock()
e.disableLocked()
- e.mu.ndp.removeSLAACAddresses(false /* keepLinkLocal */)
- e.stopDADForPermanentAddressesLocked()
e.mu.addressableEndpointState.Cleanup()
e.mu.Unlock()
@@ -1451,14 +1442,14 @@ func (e *endpoint) RemovePermanentAddress(addr tcpip.Address) tcpip.Error {
return &tcpip.ErrBadLocalAddress{}
}
- return e.removePermanentEndpointLocked(addressEndpoint, true /* allowSLAACInvalidation */, false /* dadFailure */)
+ return e.removePermanentEndpointLocked(addressEndpoint, true /* allowSLAACInvalidation */, &stack.DADAborted{})
}
// removePermanentEndpointLocked is like removePermanentAddressLocked except
// it works with a stack.AddressEndpoint.
//
// Precondition: e.mu must be write locked.
-func (e *endpoint) removePermanentEndpointLocked(addressEndpoint stack.AddressEndpoint, allowSLAACInvalidation, dadFailure bool) tcpip.Error {
+func (e *endpoint) removePermanentEndpointLocked(addressEndpoint stack.AddressEndpoint, allowSLAACInvalidation bool, dadResult stack.DADResult) tcpip.Error {
addr := addressEndpoint.AddressWithPrefix()
// If we are removing an address generated via SLAAC, cleanup
// its SLAAC resources and notify the integrator.
@@ -1469,16 +1460,16 @@ func (e *endpoint) removePermanentEndpointLocked(addressEndpoint stack.AddressEn
e.mu.ndp.cleanupTempSLAACAddrResourcesAndNotify(addr)
}
- return e.removePermanentEndpointInnerLocked(addressEndpoint, dadFailure)
+ return e.removePermanentEndpointInnerLocked(addressEndpoint, dadResult)
}
// removePermanentEndpointInnerLocked is like removePermanentEndpointLocked
// except it does not cleanup SLAAC address state.
//
// Precondition: e.mu must be write locked.
-func (e *endpoint) removePermanentEndpointInnerLocked(addressEndpoint stack.AddressEndpoint, dadFailure bool) tcpip.Error {
+func (e *endpoint) removePermanentEndpointInnerLocked(addressEndpoint stack.AddressEndpoint, dadResult stack.DADResult) tcpip.Error {
addr := addressEndpoint.AddressWithPrefix()
- e.mu.ndp.stopDuplicateAddressDetection(addr.Address, dadFailure)
+ e.mu.ndp.stopDuplicateAddressDetection(addr.Address, dadResult)
if err := e.mu.addressableEndpointState.RemovePermanentEndpoint(addressEndpoint); err != nil {
return err
diff --git a/pkg/tcpip/network/ipv6/ndp.go b/pkg/tcpip/network/ipv6/ndp.go
index c22f60709..d9b728878 100644
--- a/pkg/tcpip/network/ipv6/ndp.go
+++ b/pkg/tcpip/network/ipv6/ndp.go
@@ -208,16 +208,12 @@ const (
// NDPDispatcher is the interface integrators of netstack must implement to
// receive and handle NDP related events.
type NDPDispatcher interface {
- // OnDuplicateAddressDetectionStatus is called when the DAD process for an
- // address (addr) on a NIC (with ID nicID) completes. resolved is set to true
- // if DAD completed successfully (no duplicate addr detected); false otherwise
- // (addr was detected to be a duplicate on the link the NIC is a part of, or
- // it was stopped for some other reason, such as the address being removed).
- // If an error occured during DAD, err is set and resolved must be ignored.
+ // OnDuplicateAddressDetectionResult is called when the DAD process for an
+ // address on a NIC completes.
//
// This function is not permitted to block indefinitely. This function
// is also not permitted to call into the stack.
- OnDuplicateAddressDetectionStatus(nicID tcpip.NICID, addr tcpip.Address, resolved bool, err tcpip.Error)
+ OnDuplicateAddressDetectionResult(tcpip.NICID, tcpip.Address, stack.DADResult)
// OnDefaultRouterDiscovered is called when a new default router is
// discovered. Implementations must return true if the newly discovered
@@ -225,14 +221,14 @@ type NDPDispatcher interface {
//
// This function is not permitted to block indefinitely. This function
// is also not permitted to call into the stack.
- OnDefaultRouterDiscovered(nicID tcpip.NICID, addr tcpip.Address) bool
+ OnDefaultRouterDiscovered(tcpip.NICID, tcpip.Address) bool
// OnDefaultRouterInvalidated is called when a discovered default router that
// was remembered is invalidated.
//
// This function is not permitted to block indefinitely. This function
// is also not permitted to call into the stack.
- OnDefaultRouterInvalidated(nicID tcpip.NICID, addr tcpip.Address)
+ OnDefaultRouterInvalidated(tcpip.NICID, tcpip.Address)
// OnOnLinkPrefixDiscovered is called when a new on-link prefix is discovered.
// Implementations must return true if the newly discovered on-link prefix
@@ -240,14 +236,14 @@ type NDPDispatcher interface {
//
// This function is not permitted to block indefinitely. This function
// is also not permitted to call into the stack.
- OnOnLinkPrefixDiscovered(nicID tcpip.NICID, prefix tcpip.Subnet) bool
+ OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) bool
// OnOnLinkPrefixInvalidated is called when a discovered on-link prefix that
// was remembered is invalidated.
//
// This function is not permitted to block indefinitely. This function
// is also not permitted to call into the stack.
- OnOnLinkPrefixInvalidated(nicID tcpip.NICID, prefix tcpip.Subnet)
+ OnOnLinkPrefixInvalidated(tcpip.NICID, tcpip.Subnet)
// OnAutoGenAddress is called when a new prefix with its autonomous address-
// configuration flag set is received and SLAAC was performed. Implementations
@@ -280,12 +276,12 @@ type NDPDispatcher interface {
// It is up to the caller to use the DNS Servers only for their valid
// lifetime. OnRecursiveDNSServerOption may be called for new or
// already known DNS servers. If called with known DNS servers, their
- // valid lifetimes must be refreshed to lifetime (it may be increased,
- // decreased, or completely invalidated when lifetime = 0).
+ // valid lifetimes must be refreshed to the lifetime (it may be increased,
+ // decreased, or completely invalidated when the lifetime = 0).
//
// This function is not permitted to block indefinitely. It must not
// call functions on the stack itself.
- OnRecursiveDNSServerOption(nicID tcpip.NICID, addrs []tcpip.Address, lifetime time.Duration)
+ OnRecursiveDNSServerOption(tcpip.NICID, []tcpip.Address, time.Duration)
// OnDNSSearchListOption is called when the stack learns of DNS search lists
// through NDP.
@@ -293,9 +289,9 @@ type NDPDispatcher interface {
// It is up to the caller to use the domain names in the search list
// for only their valid lifetime. OnDNSSearchListOption may be called
// with new or already known domain names. If called with known domain
- // names, their valid lifetimes must be refreshed to lifetime (it may
- // be increased, decreased or completely invalidated when lifetime = 0.
- OnDNSSearchListOption(nicID tcpip.NICID, domainNames []string, lifetime time.Duration)
+ // names, their valid lifetimes must be refreshed to the lifetime (it may
+ // be increased, decreased or completely invalidated when the lifetime = 0.
+ OnDNSSearchListOption(tcpip.NICID, []string, time.Duration)
// OnDHCPv6Configuration is called with an updated configuration that is
// available via DHCPv6 for the passed NIC.
@@ -587,15 +583,25 @@ func (ndp *ndpState) startDuplicateAddressDetection(addr tcpip.Address, addressE
panic(fmt.Sprintf("ndpdad: addr %s is no longer tentative on NIC(%d)", addr, ndp.ep.nic.ID()))
}
- if r.Resolved {
+ var dadSucceeded bool
+ switch r.(type) {
+ case *stack.DADAborted, *stack.DADError, *stack.DADDupAddrDetected:
+ dadSucceeded = false
+ case *stack.DADSucceeded:
+ dadSucceeded = true
+ default:
+ panic(fmt.Sprintf("unrecognized DAD result = %T", r))
+ }
+
+ if dadSucceeded {
addressEndpoint.SetKind(stack.Permanent)
}
if ndpDisp := ndp.ep.protocol.options.NDPDisp; ndpDisp != nil {
- ndpDisp.OnDuplicateAddressDetectionStatus(ndp.ep.nic.ID(), addr, r.Resolved, r.Err)
+ ndpDisp.OnDuplicateAddressDetectionResult(ndp.ep.nic.ID(), addr, r)
}
- if r.Resolved {
+ if dadSucceeded {
if addressEndpoint.ConfigType() == stack.AddressConfigSlaac {
// Reset the generation attempts counter as we are starting the
// generation of a new address for the SLAAC prefix.
@@ -616,7 +622,7 @@ func (ndp *ndpState) startDuplicateAddressDetection(addr tcpip.Address, addressE
// Consider DAD to have resolved even if no DAD messages were actually
// transmitted.
if ndpDisp := ndp.ep.protocol.options.NDPDisp; ndpDisp != nil {
- ndpDisp.OnDuplicateAddressDetectionStatus(ndp.ep.nic.ID(), addr, true, nil)
+ ndpDisp.OnDuplicateAddressDetectionResult(ndp.ep.nic.ID(), addr, &stack.DADSucceeded{})
}
ndp.ep.onAddressAssignedLocked(addr)
@@ -633,8 +639,8 @@ func (ndp *ndpState) startDuplicateAddressDetection(addr tcpip.Address, addressE
// of this function to handle such a scenario.
//
// The IPv6 endpoint that ndp belongs to MUST be locked.
-func (ndp *ndpState) stopDuplicateAddressDetection(addr tcpip.Address, failed bool) {
- ndp.dad.StopLocked(addr, !failed)
+func (ndp *ndpState) stopDuplicateAddressDetection(addr tcpip.Address, reason stack.DADResult) {
+ ndp.dad.StopLocked(addr, reason)
}
// handleRA handles a Router Advertisement message that arrived on the NIC
@@ -1501,7 +1507,7 @@ func (ndp *ndpState) invalidateSLAACPrefix(prefix tcpip.Subnet, state slaacPrefi
ndpDisp.OnAutoGenAddressInvalidated(ndp.ep.nic.ID(), addressEndpoint.AddressWithPrefix())
}
- if err := ndp.ep.removePermanentEndpointInnerLocked(addressEndpoint, false /* dadFailure */); err != nil {
+ if err := ndp.ep.removePermanentEndpointInnerLocked(addressEndpoint, &stack.DADAborted{}); err != nil {
panic(fmt.Sprintf("ndp: error removing stable SLAAC address %s: %s", addressEndpoint.AddressWithPrefix(), err))
}
}
@@ -1560,7 +1566,7 @@ func (ndp *ndpState) cleanupSLAACPrefixResources(prefix tcpip.Subnet, state slaa
func (ndp *ndpState) invalidateTempSLAACAddr(tempAddrs map[tcpip.Address]tempSLAACAddrState, tempAddr tcpip.Address, tempAddrState tempSLAACAddrState) {
ndp.cleanupTempSLAACAddrResourcesAndNotifyInner(tempAddrs, tempAddr, tempAddrState)
- if err := ndp.ep.removePermanentEndpointInnerLocked(tempAddrState.addressEndpoint, false /* dadFailure */); err != nil {
+ if err := ndp.ep.removePermanentEndpointInnerLocked(tempAddrState.addressEndpoint, &stack.DADAborted{}); err != nil {
panic(fmt.Sprintf("error removing temporary SLAAC address %s: %s", tempAddrState.addressEndpoint.AddressWithPrefix(), err))
}
}
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go
index 43e9e4beb..426342fd2 100644
--- a/pkg/tcpip/stack/registration.go
+++ b/pkg/tcpip/stack/registration.go
@@ -852,18 +852,42 @@ type InjectableLinkEndpoint interface {
InjectOutbound(dest tcpip.Address, packet []byte) tcpip.Error
}
-// DADResult is the result of a duplicate address detection process.
-type DADResult struct {
- // Resolved is true when DAD completed without detecting a duplicate address
- // on the link.
- //
- // Ignored when Err is non-nil.
- Resolved bool
+// DADResult is a marker interface for the result of a duplicate address
+// detection process.
+type DADResult interface {
+ isDADResult()
+}
+
+var _ DADResult = (*DADSucceeded)(nil)
+
+// DADSucceeded indicates DAD completed without finding any duplicate addresses.
+type DADSucceeded struct{}
- // Err is an error encountered while performing DAD.
+func (*DADSucceeded) isDADResult() {}
+
+var _ DADResult = (*DADError)(nil)
+
+// DADError indicates DAD hit an error.
+type DADError struct {
Err tcpip.Error
}
+func (*DADError) isDADResult() {}
+
+var _ DADResult = (*DADAborted)(nil)
+
+// DADAborted indicates DAD was aborted.
+type DADAborted struct{}
+
+func (*DADAborted) isDADResult() {}
+
+var _ DADResult = (*DADDupAddrDetected)(nil)
+
+// DADDupAddrDetected indicates DAD detected a duplicate address.
+type DADDupAddrDetected struct{}
+
+func (*DADDupAddrDetected) isDADResult() {}
+
// DADCompletionHandler is a handler for DAD completion.
type DADCompletionHandler func(DADResult)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 14:28:11 +0000