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-rw-r--r--pkg/tcpip/stack/neighbor_cache.go116
-rw-r--r--pkg/tcpip/stack/neighbor_entry.go157
-rw-r--r--pkg/tcpip/stack/nic.go8
3 files changed, 149 insertions, 132 deletions
diff --git a/pkg/tcpip/stack/neighbor_cache.go b/pkg/tcpip/stack/neighbor_cache.go
index b7cd4faa8..1409604df 100644
--- a/pkg/tcpip/stack/neighbor_cache.go
+++ b/pkg/tcpip/stack/neighbor_cache.go
@@ -47,17 +47,18 @@ type neighborCache struct {
state *NUDState
linkRes LinkAddressResolver
- // mu protects the fields below.
- mu sync.RWMutex
+ mu struct {
+ sync.RWMutex
- cache map[tcpip.Address]*neighborEntry
- dynamic struct {
- lru neighborEntryList
+ cache map[tcpip.Address]*neighborEntry
+ dynamic struct {
+ lru neighborEntryList
- // count tracks the amount of dynamic entries in the cache. This is
- // needed since static entries do not count towards the LRU cache
- // eviction strategy.
- count uint16
+ // count tracks the amount of dynamic entries in the cache. This is
+ // needed since static entries do not count towards the LRU cache
+ // eviction strategy.
+ count uint16
+ }
}
}
@@ -74,11 +75,11 @@ func (n *neighborCache) getOrCreateEntry(remoteAddr tcpip.Address) *neighborEntr
n.mu.Lock()
defer n.mu.Unlock()
- if entry, ok := n.cache[remoteAddr]; ok {
+ if entry, ok := n.mu.cache[remoteAddr]; ok {
entry.mu.RLock()
- if entry.neigh.State != Static {
- n.dynamic.lru.Remove(entry)
- n.dynamic.lru.PushFront(entry)
+ if entry.mu.neigh.State != Static {
+ n.mu.dynamic.lru.Remove(entry)
+ n.mu.dynamic.lru.PushFront(entry)
}
entry.mu.RUnlock()
return entry
@@ -87,20 +88,20 @@ func (n *neighborCache) getOrCreateEntry(remoteAddr tcpip.Address) *neighborEntr
// The entry that needs to be created must be dynamic since all static
// entries are directly added to the cache via addStaticEntry.
entry := newNeighborEntry(n, remoteAddr, n.state)
- if n.dynamic.count == neighborCacheSize {
- e := n.dynamic.lru.Back()
+ if n.mu.dynamic.count == neighborCacheSize {
+ e := n.mu.dynamic.lru.Back()
e.mu.Lock()
- delete(n.cache, e.neigh.Addr)
- n.dynamic.lru.Remove(e)
- n.dynamic.count--
+ delete(n.mu.cache, e.mu.neigh.Addr)
+ n.mu.dynamic.lru.Remove(e)
+ n.mu.dynamic.count--
e.removeLocked()
e.mu.Unlock()
}
- n.cache[remoteAddr] = entry
- n.dynamic.lru.PushFront(entry)
- n.dynamic.count++
+ n.mu.cache[remoteAddr] = entry
+ n.mu.dynamic.lru.PushFront(entry)
+ n.mu.dynamic.count++
return entry
}
@@ -128,7 +129,7 @@ func (n *neighborCache) entry(remoteAddr, localAddr tcpip.Address, onResolve fun
entry.mu.Lock()
defer entry.mu.Unlock()
- switch s := entry.neigh.State; s {
+ switch s := entry.mu.neigh.State; s {
case Stale:
entry.handlePacketQueuedLocked(localAddr)
fallthrough
@@ -139,19 +140,19 @@ func (n *neighborCache) entry(remoteAddr, localAddr tcpip.Address, onResolve fun
// a node continues sending packets to that neighbor using the cached
// link-layer address."
if onResolve != nil {
- onResolve(LinkResolutionResult{LinkAddress: entry.neigh.LinkAddr, Success: true})
+ onResolve(LinkResolutionResult{LinkAddress: entry.mu.neigh.LinkAddr, Success: true})
}
- return entry.neigh, nil, nil
+ return entry.mu.neigh, nil, nil
case Unknown, Incomplete, Failed:
if onResolve != nil {
- entry.onResolve = append(entry.onResolve, onResolve)
+ entry.mu.onResolve = append(entry.mu.onResolve, onResolve)
}
- if entry.done == nil {
+ if entry.mu.done == nil {
// Address resolution needs to be initiated.
- entry.done = make(chan struct{})
+ entry.mu.done = make(chan struct{})
}
entry.handlePacketQueuedLocked(localAddr)
- return entry.neigh, entry.done, &tcpip.ErrWouldBlock{}
+ return entry.mu.neigh, entry.mu.done, &tcpip.ErrWouldBlock{}
default:
panic(fmt.Sprintf("Invalid cache entry state: %s", s))
}
@@ -162,10 +163,10 @@ func (n *neighborCache) entries() []NeighborEntry {
n.mu.RLock()
defer n.mu.RUnlock()
- entries := make([]NeighborEntry, 0, len(n.cache))
- for _, entry := range n.cache {
+ entries := make([]NeighborEntry, 0, len(n.mu.cache))
+ for _, entry := range n.mu.cache {
entry.mu.RLock()
- entries = append(entries, entry.neigh)
+ entries = append(entries, entry.mu.neigh)
entry.mu.RUnlock()
}
return entries
@@ -181,19 +182,19 @@ func (n *neighborCache) addStaticEntry(addr tcpip.Address, linkAddr tcpip.LinkAd
n.mu.Lock()
defer n.mu.Unlock()
- if entry, ok := n.cache[addr]; ok {
+ if entry, ok := n.mu.cache[addr]; ok {
entry.mu.Lock()
- if entry.neigh.State != Static {
+ if entry.mu.neigh.State != Static {
// Dynamic entry found with the same address.
- n.dynamic.lru.Remove(entry)
- n.dynamic.count--
- } else if entry.neigh.LinkAddr == linkAddr {
+ n.mu.dynamic.lru.Remove(entry)
+ n.mu.dynamic.count--
+ } else if entry.mu.neigh.LinkAddr == linkAddr {
// Static entry found with the same address and link address.
entry.mu.Unlock()
return
} else {
// Static entry found with the same address but different link address.
- entry.neigh.LinkAddr = linkAddr
+ entry.mu.neigh.LinkAddr = linkAddr
entry.dispatchChangeEventLocked()
entry.mu.Unlock()
return
@@ -203,7 +204,12 @@ func (n *neighborCache) addStaticEntry(addr tcpip.Address, linkAddr tcpip.LinkAd
entry.mu.Unlock()
}
- n.cache[addr] = newStaticNeighborEntry(n, addr, linkAddr, n.state)
+ entry := newStaticNeighborEntry(n, addr, linkAddr, n.state)
+ n.mu.cache[addr] = entry
+
+ entry.mu.Lock()
+ defer entry.mu.Unlock()
+ entry.dispatchAddEventLocked()
}
// removeEntry removes a dynamic or static entry by address from the neighbor
@@ -212,7 +218,7 @@ func (n *neighborCache) removeEntry(addr tcpip.Address) bool {
n.mu.Lock()
defer n.mu.Unlock()
- entry, ok := n.cache[addr]
+ entry, ok := n.mu.cache[addr]
if !ok {
return false
}
@@ -220,13 +226,13 @@ func (n *neighborCache) removeEntry(addr tcpip.Address) bool {
entry.mu.Lock()
defer entry.mu.Unlock()
- if entry.neigh.State != Static {
- n.dynamic.lru.Remove(entry)
- n.dynamic.count--
+ if entry.mu.neigh.State != Static {
+ n.mu.dynamic.lru.Remove(entry)
+ n.mu.dynamic.count--
}
entry.removeLocked()
- delete(n.cache, entry.neigh.Addr)
+ delete(n.mu.cache, entry.mu.neigh.Addr)
return true
}
@@ -235,15 +241,15 @@ func (n *neighborCache) clear() {
n.mu.Lock()
defer n.mu.Unlock()
- for _, entry := range n.cache {
+ for _, entry := range n.mu.cache {
entry.mu.Lock()
entry.removeLocked()
entry.mu.Unlock()
}
- n.dynamic.lru = neighborEntryList{}
- n.cache = make(map[tcpip.Address]*neighborEntry)
- n.dynamic.count = 0
+ n.mu.dynamic.lru = neighborEntryList{}
+ n.mu.cache = make(map[tcpip.Address]*neighborEntry)
+ n.mu.dynamic.count = 0
}
// config returns the NUD configuration.
@@ -300,7 +306,7 @@ func (n *neighborCache) handleProbe(remoteAddr tcpip.Address, remoteLinkAddr tcp
// Validation of the confirmation is expected to be handled by the caller.
func (n *neighborCache) handleConfirmation(addr tcpip.Address, linkAddr tcpip.LinkAddress, flags ReachabilityConfirmationFlags) {
n.mu.RLock()
- entry, ok := n.cache[addr]
+ entry, ok := n.mu.cache[addr]
n.mu.RUnlock()
if ok {
entry.mu.Lock()
@@ -316,7 +322,7 @@ func (n *neighborCache) handleConfirmation(addr tcpip.Address, linkAddr tcpip.Li
// some protocol that operates at a layer above the IP/link layer.
func (n *neighborCache) handleUpperLevelConfirmation(addr tcpip.Address) {
n.mu.RLock()
- entry, ok := n.cache[addr]
+ entry, ok := n.mu.cache[addr]
n.mu.RUnlock()
if ok {
entry.mu.Lock()
@@ -333,3 +339,15 @@ func (n *neighborCache) setNUDConfig(c NUDConfigurations) tcpip.Error {
n.setConfig(c)
return nil
}
+
+func newNeighborCache(nic *nic, r LinkAddressResolver) *neighborCache {
+ n := &neighborCache{
+ nic: nic,
+ state: NewNUDState(nic.stack.nudConfigs, nic.stack.randomGenerator),
+ linkRes: r,
+ }
+ n.mu.Lock()
+ n.mu.cache = make(map[tcpip.Address]*neighborEntry, neighborCacheSize)
+ n.mu.Unlock()
+ return n
+}
diff --git a/pkg/tcpip/stack/neighbor_entry.go b/pkg/tcpip/stack/neighbor_entry.go
index b05f96d4f..3dba6f7e9 100644
--- a/pkg/tcpip/stack/neighbor_entry.go
+++ b/pkg/tcpip/stack/neighbor_entry.go
@@ -82,20 +82,21 @@ type neighborEntry struct {
// nudState points to the Neighbor Unreachability Detection configuration.
nudState *NUDState
- // mu protects the fields below.
- mu sync.RWMutex
+ mu struct {
+ sync.RWMutex
- neigh NeighborEntry
+ neigh NeighborEntry
- // done is closed when address resolution is complete. It is nil iff s is
- // incomplete and resolution is not yet in progress.
- done chan struct{}
+ // done is closed when address resolution is complete. It is nil iff s is
+ // incomplete and resolution is not yet in progress.
+ done chan struct{}
- // onResolve is called with the result of address resolution.
- onResolve []func(LinkResolutionResult)
+ // onResolve is called with the result of address resolution.
+ onResolve []func(LinkResolutionResult)
- isRouter bool
- job *tcpip.Job
+ isRouter bool
+ job *tcpip.Job
+ }
}
// newNeighborEntry creates a neighbor cache entry starting at the default
@@ -103,14 +104,18 @@ type neighborEntry struct {
// `handlePacketQueuedLocked` or `handleProbeLocked` on the newly created
// neighborEntry.
func newNeighborEntry(cache *neighborCache, remoteAddr tcpip.Address, nudState *NUDState) *neighborEntry {
- return &neighborEntry{
+ n := &neighborEntry{
cache: cache,
nudState: nudState,
- neigh: NeighborEntry{
- Addr: remoteAddr,
- State: Unknown,
- },
}
+ n.mu.Lock()
+ n.mu.neigh = NeighborEntry{
+ Addr: remoteAddr,
+ State: Unknown,
+ }
+ n.mu.Unlock()
+ return n
+
}
// newStaticNeighborEntry creates a neighbor cache entry starting at the
@@ -123,14 +128,14 @@ func newStaticNeighborEntry(cache *neighborCache, addr tcpip.Address, linkAddr t
State: Static,
UpdatedAtNanos: cache.nic.stack.clock.NowNanoseconds(),
}
- if nudDisp := cache.nic.stack.nudDisp; nudDisp != nil {
- nudDisp.OnNeighborAdded(cache.nic.id, entry)
- }
- return &neighborEntry{
+ n := &neighborEntry{
cache: cache,
nudState: state,
- neigh: entry,
}
+ n.mu.Lock()
+ n.mu.neigh = entry
+ n.mu.Unlock()
+ return n
}
// notifyCompletionLocked notifies those waiting for address resolution, with
@@ -138,14 +143,14 @@ func newStaticNeighborEntry(cache *neighborCache, addr tcpip.Address, linkAddr t
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) notifyCompletionLocked(succeeded bool) {
- res := LinkResolutionResult{LinkAddress: e.neigh.LinkAddr, Success: succeeded}
- for _, callback := range e.onResolve {
+ res := LinkResolutionResult{LinkAddress: e.mu.neigh.LinkAddr, Success: succeeded}
+ for _, callback := range e.mu.onResolve {
callback(res)
}
- e.onResolve = nil
- if ch := e.done; ch != nil {
+ e.mu.onResolve = nil
+ if ch := e.mu.done; ch != nil {
close(ch)
- e.done = nil
+ e.mu.done = nil
// Dequeue the pending packets in a new goroutine to not hold up the current
// goroutine as writing packets may be a costly operation.
//
@@ -153,7 +158,7 @@ func (e *neighborEntry) notifyCompletionLocked(succeeded bool) {
// is resolved (which ends up obtaining the entry's lock) while holding the
// link resolution queue's lock. Dequeuing packets in a new goroutine avoids
// a lock ordering violation.
- go e.cache.nic.linkResQueue.dequeue(ch, e.neigh.LinkAddr, succeeded)
+ go e.cache.nic.linkResQueue.dequeue(ch, e.mu.neigh.LinkAddr, succeeded)
}
}
@@ -163,7 +168,7 @@ func (e *neighborEntry) notifyCompletionLocked(succeeded bool) {
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) dispatchAddEventLocked() {
if nudDisp := e.cache.nic.stack.nudDisp; nudDisp != nil {
- nudDisp.OnNeighborAdded(e.cache.nic.id, e.neigh)
+ nudDisp.OnNeighborAdded(e.cache.nic.id, e.mu.neigh)
}
}
@@ -173,7 +178,7 @@ func (e *neighborEntry) dispatchAddEventLocked() {
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) dispatchChangeEventLocked() {
if nudDisp := e.cache.nic.stack.nudDisp; nudDisp != nil {
- nudDisp.OnNeighborChanged(e.cache.nic.id, e.neigh)
+ nudDisp.OnNeighborChanged(e.cache.nic.id, e.mu.neigh)
}
}
@@ -183,7 +188,7 @@ func (e *neighborEntry) dispatchChangeEventLocked() {
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) dispatchRemoveEventLocked() {
if nudDisp := e.cache.nic.stack.nudDisp; nudDisp != nil {
- nudDisp.OnNeighborRemoved(e.cache.nic.id, e.neigh)
+ nudDisp.OnNeighborRemoved(e.cache.nic.id, e.mu.neigh)
}
}
@@ -192,7 +197,7 @@ func (e *neighborEntry) dispatchRemoveEventLocked() {
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) cancelJobLocked() {
- if job := e.job; job != nil {
+ if job := e.mu.job; job != nil {
job.Cancel()
}
}
@@ -201,7 +206,7 @@ func (e *neighborEntry) cancelJobLocked() {
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) removeLocked() {
- e.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
+ e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
e.dispatchRemoveEventLocked()
e.cancelJobLocked()
e.notifyCompletionLocked(false /* succeeded */)
@@ -215,28 +220,28 @@ func (e *neighborEntry) removeLocked() {
func (e *neighborEntry) setStateLocked(next NeighborState) {
e.cancelJobLocked()
- prev := e.neigh.State
- e.neigh.State = next
- e.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
+ prev := e.mu.neigh.State
+ e.mu.neigh.State = next
+ e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
config := e.nudState.Config()
switch next {
case Incomplete:
- panic(fmt.Sprintf("should never transition to Incomplete with setStateLocked; neigh = %#v, prev state = %s", e.neigh, prev))
+ panic(fmt.Sprintf("should never transition to Incomplete with setStateLocked; neigh = %#v, prev state = %s", e.mu.neigh, prev))
case Reachable:
- e.job = e.cache.nic.stack.newJob(&e.mu, func() {
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, func() {
e.setStateLocked(Stale)
e.dispatchChangeEventLocked()
})
- e.job.Schedule(e.nudState.ReachableTime())
+ e.mu.job.Schedule(e.nudState.ReachableTime())
case Delay:
- e.job = e.cache.nic.stack.newJob(&e.mu, func() {
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, func() {
e.setStateLocked(Probe)
e.dispatchChangeEventLocked()
})
- e.job.Schedule(config.DelayFirstProbeTime)
+ e.mu.job.Schedule(config.DelayFirstProbeTime)
case Probe:
var retryCounter uint32
@@ -249,23 +254,23 @@ func (e *neighborEntry) setStateLocked(next NeighborState) {
return
}
- if err := e.cache.linkRes.LinkAddressRequest(e.neigh.Addr, "" /* localAddr */, e.neigh.LinkAddr); err != nil {
+ if err := e.cache.linkRes.LinkAddressRequest(e.mu.neigh.Addr, "" /* localAddr */, e.mu.neigh.LinkAddr); err != nil {
e.dispatchRemoveEventLocked()
e.setStateLocked(Failed)
return
}
retryCounter++
- e.job = e.cache.nic.stack.newJob(&e.mu, sendUnicastProbe)
- e.job.Schedule(config.RetransmitTimer)
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, sendUnicastProbe)
+ e.mu.job.Schedule(config.RetransmitTimer)
}
// Send a probe in another gorountine to free this thread of execution
// for finishing the state transition. This is necessary to avoid
// deadlock where sending and processing probes are done synchronously,
// such as loopback and integration tests.
- e.job = e.cache.nic.stack.newJob(&e.mu, sendUnicastProbe)
- e.job.Schedule(immediateDuration)
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, sendUnicastProbe)
+ e.mu.job.Schedule(immediateDuration)
case Failed:
e.notifyCompletionLocked(false /* succeeded */)
@@ -285,14 +290,14 @@ func (e *neighborEntry) setStateLocked(next NeighborState) {
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) {
- switch e.neigh.State {
+ switch e.mu.neigh.State {
case Failed:
e.cache.nic.stats.Neighbor.FailedEntryLookups.Increment()
fallthrough
case Unknown:
- e.neigh.State = Incomplete
- e.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
+ e.mu.neigh.State = Incomplete
+ e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds()
e.dispatchAddEventLocked()
@@ -335,7 +340,7 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) {
// address SHOULD be placed in the IP Source Address of the outgoing
// solicitation.
//
- if err := e.cache.linkRes.LinkAddressRequest(e.neigh.Addr, localAddr, ""); err != nil {
+ if err := e.cache.linkRes.LinkAddressRequest(e.mu.neigh.Addr, localAddr, ""); err != nil {
// There is no need to log the error here; the NUD implementation may
// assume a working link. A valid link should be the responsibility of
// the NIC/stack.LinkEndpoint.
@@ -345,16 +350,16 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) {
}
retryCounter++
- e.job = e.cache.nic.stack.newJob(&e.mu, sendMulticastProbe)
- e.job.Schedule(config.RetransmitTimer)
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, sendMulticastProbe)
+ e.mu.job.Schedule(config.RetransmitTimer)
}
// Send a probe in another gorountine to free this thread of execution
// for finishing the state transition. This is necessary to avoid
// deadlock where sending and processing probes are done synchronously,
// such as loopback and integration tests.
- e.job = e.cache.nic.stack.newJob(&e.mu, sendMulticastProbe)
- e.job.Schedule(immediateDuration)
+ e.mu.job = e.cache.nic.stack.newJob(&e.mu, sendMulticastProbe)
+ e.mu.job.Schedule(immediateDuration)
case Stale:
e.setStateLocked(Delay)
@@ -363,7 +368,7 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) {
case Incomplete, Reachable, Delay, Probe, Static:
// Do nothing
default:
- panic(fmt.Sprintf("Invalid cache entry state: %s", e.neigh.State))
+ panic(fmt.Sprintf("Invalid cache entry state: %s", e.mu.neigh.State))
}
}
@@ -378,9 +383,9 @@ func (e *neighborEntry) handleProbeLocked(remoteLinkAddr tcpip.LinkAddress) {
// not exist, or not bound to the NIC as per RFC 4861 section 7.2.3. These
// checks MUST be done by the NetworkEndpoint.
- switch e.neigh.State {
+ switch e.mu.neigh.State {
case Unknown, Failed:
- e.neigh.LinkAddr = remoteLinkAddr
+ e.mu.neigh.LinkAddr = remoteLinkAddr
e.setStateLocked(Stale)
e.dispatchAddEventLocked()
@@ -390,21 +395,21 @@ func (e *neighborEntry) handleProbeLocked(remoteLinkAddr tcpip.LinkAddress) {
// cached address should be replaced by the received address, and the
// entry's reachability state MUST be set to STALE."
// - RFC 4861 section 7.2.3
- e.neigh.LinkAddr = remoteLinkAddr
+ e.mu.neigh.LinkAddr = remoteLinkAddr
e.setStateLocked(Stale)
e.notifyCompletionLocked(true /* succeeded */)
e.dispatchChangeEventLocked()
case Reachable, Delay, Probe:
- if e.neigh.LinkAddr != remoteLinkAddr {
- e.neigh.LinkAddr = remoteLinkAddr
+ if e.mu.neigh.LinkAddr != remoteLinkAddr {
+ e.mu.neigh.LinkAddr = remoteLinkAddr
e.setStateLocked(Stale)
e.dispatchChangeEventLocked()
}
case Stale:
- if e.neigh.LinkAddr != remoteLinkAddr {
- e.neigh.LinkAddr = remoteLinkAddr
+ if e.mu.neigh.LinkAddr != remoteLinkAddr {
+ e.mu.neigh.LinkAddr = remoteLinkAddr
e.dispatchChangeEventLocked()
}
@@ -412,7 +417,7 @@ func (e *neighborEntry) handleProbeLocked(remoteLinkAddr tcpip.LinkAddress) {
// Do nothing
default:
- panic(fmt.Sprintf("Invalid cache entry state: %s", e.neigh.State))
+ panic(fmt.Sprintf("Invalid cache entry state: %s", e.mu.neigh.State))
}
}
@@ -430,7 +435,7 @@ func (e *neighborEntry) handleProbeLocked(remoteLinkAddr tcpip.LinkAddress) {
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, flags ReachabilityConfirmationFlags) {
- switch e.neigh.State {
+ switch e.mu.neigh.State {
case Incomplete:
if len(linkAddr) == 0 {
// "If the link layer has addresses and no Target Link-Layer Address
@@ -439,35 +444,35 @@ func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, fla
break
}
- e.neigh.LinkAddr = linkAddr
+ e.mu.neigh.LinkAddr = linkAddr
if flags.Solicited {
e.setStateLocked(Reachable)
} else {
e.setStateLocked(Stale)
}
e.dispatchChangeEventLocked()
- e.isRouter = flags.IsRouter
+ e.mu.isRouter = flags.IsRouter
e.notifyCompletionLocked(true /* succeeded */)
// "Note that the Override flag is ignored if the entry is in the
// INCOMPLETE state." - RFC 4861 section 7.2.5
case Reachable, Stale, Delay, Probe:
- isLinkAddrDifferent := len(linkAddr) != 0 && e.neigh.LinkAddr != linkAddr
+ isLinkAddrDifferent := len(linkAddr) != 0 && e.mu.neigh.LinkAddr != linkAddr
if isLinkAddrDifferent {
if !flags.Override {
- if e.neigh.State == Reachable {
+ if e.mu.neigh.State == Reachable {
e.setStateLocked(Stale)
e.dispatchChangeEventLocked()
}
break
}
- e.neigh.LinkAddr = linkAddr
+ e.mu.neigh.LinkAddr = linkAddr
if !flags.Solicited {
- if e.neigh.State != Stale {
+ if e.mu.neigh.State != Stale {
e.setStateLocked(Stale)
e.dispatchChangeEventLocked()
} else {
@@ -479,7 +484,7 @@ func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, fla
}
if flags.Solicited && (flags.Override || !isLinkAddrDifferent) {
- wasReachable := e.neigh.State == Reachable
+ wasReachable := e.mu.neigh.State == Reachable
// Set state to Reachable again to refresh timers.
e.setStateLocked(Reachable)
e.notifyCompletionLocked(true /* succeeded */)
@@ -488,7 +493,7 @@ func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, fla
}
}
- if e.isRouter && !flags.IsRouter && header.IsV6UnicastAddress(e.neigh.Addr) {
+ if e.mu.isRouter && !flags.IsRouter && header.IsV6UnicastAddress(e.mu.neigh.Addr) {
// "In those cases where the IsRouter flag changes from TRUE to FALSE as
// a result of this update, the node MUST remove that router from the
// Default Router List and update the Destination Cache entries for all
@@ -505,16 +510,16 @@ func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, fla
}
if ndpEP, ok := ep.(NDPEndpoint); ok {
- ndpEP.InvalidateDefaultRouter(e.neigh.Addr)
+ ndpEP.InvalidateDefaultRouter(e.mu.neigh.Addr)
}
}
- e.isRouter = flags.IsRouter
+ e.mu.isRouter = flags.IsRouter
case Unknown, Failed, Static:
// Do nothing
default:
- panic(fmt.Sprintf("Invalid cache entry state: %s", e.neigh.State))
+ panic(fmt.Sprintf("Invalid cache entry state: %s", e.mu.neigh.State))
}
}
@@ -523,9 +528,9 @@ func (e *neighborEntry) handleConfirmationLocked(linkAddr tcpip.LinkAddress, fla
//
// Precondition: e.mu MUST be locked.
func (e *neighborEntry) handleUpperLevelConfirmationLocked() {
- switch e.neigh.State {
+ switch e.mu.neigh.State {
case Reachable, Stale, Delay, Probe:
- wasReachable := e.neigh.State == Reachable
+ wasReachable := e.mu.neigh.State == Reachable
// Set state to Reachable again to refresh timers.
e.setStateLocked(Reachable)
if !wasReachable {
@@ -536,6 +541,6 @@ func (e *neighborEntry) handleUpperLevelConfirmationLocked() {
// Do nothing
default:
- panic(fmt.Sprintf("Invalid cache entry state: %s", e.neigh.State))
+ panic(fmt.Sprintf("Invalid cache entry state: %s", e.mu.neigh.State))
}
}
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go
index 6c09ba5ff..f85652093 100644
--- a/pkg/tcpip/stack/nic.go
+++ b/pkg/tcpip/stack/nic.go
@@ -190,13 +190,7 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, ctx NICC
}
if stack.useNeighborCache {
- l.neighborTable = &neighborCache{
- nic: nic,
- state: NewNUDState(stack.nudConfigs, stack.randomGenerator),
- linkRes: r,
-
- cache: make(map[tcpip.Address]*neighborEntry, neighborCacheSize),
- }
+ l.neighborTable = newNeighborCache(nic, r)
} else {
cache := new(linkAddrCache)
cache.init(nic, ageLimit, resolutionTimeout, resolutionAttempts, r)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 18:09:16 +0000