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-rw-r--r--pkg/tcpip/stack/ndp.go140
-rw-r--r--pkg/tcpip/stack/ndp_test.go28
-rw-r--r--pkg/tcpip/stack/stack.go12
3 files changed, 93 insertions, 87 deletions
diff --git a/pkg/tcpip/stack/ndp.go b/pkg/tcpip/stack/ndp.go
index e28c23d66..9dce11a97 100644
--- a/pkg/tcpip/stack/ndp.go
+++ b/pkg/tcpip/stack/ndp.go
@@ -469,7 +469,7 @@ type ndpState struct {
rtrSolicit struct {
// The timer used to send the next router solicitation message.
- timer *time.Timer
+ timer tcpip.Timer
// Used to let the Router Solicitation timer know that it has been stopped.
//
@@ -503,7 +503,7 @@ type ndpState struct {
// to the DAD goroutine that DAD should stop.
type dadState struct {
// The DAD timer to send the next NS message, or resolve the address.
- timer *time.Timer
+ timer tcpip.Timer
// Used to let the DAD timer know that it has been stopped.
//
@@ -515,38 +515,38 @@ type dadState struct {
// defaultRouterState holds data associated with a default router discovered by
// a Router Advertisement (RA).
type defaultRouterState struct {
- // Timer to invalidate the default router.
+ // Job to invalidate the default router.
//
// Must not be nil.
- invalidationTimer *tcpip.CancellableTimer
+ invalidationJob *tcpip.Job
}
// onLinkPrefixState holds data associated with an on-link prefix discovered by
// a Router Advertisement's Prefix Information option (PI) when the NDP
// configurations was configured to do so.
type onLinkPrefixState struct {
- // Timer to invalidate the on-link prefix.
+ // Job to invalidate the on-link prefix.
//
// Must not be nil.
- invalidationTimer *tcpip.CancellableTimer
+ invalidationJob *tcpip.Job
}
// tempSLAACAddrState holds state associated with a temporary SLAAC address.
type tempSLAACAddrState struct {
- // Timer to deprecate the temporary SLAAC address.
+ // Job to deprecate the temporary SLAAC address.
//
// Must not be nil.
- deprecationTimer *tcpip.CancellableTimer
+ deprecationJob *tcpip.Job
- // Timer to invalidate the temporary SLAAC address.
+ // Job to invalidate the temporary SLAAC address.
//
// Must not be nil.
- invalidationTimer *tcpip.CancellableTimer
+ invalidationJob *tcpip.Job
- // Timer to regenerate the temporary SLAAC address.
+ // Job to regenerate the temporary SLAAC address.
//
// Must not be nil.
- regenTimer *tcpip.CancellableTimer
+ regenJob *tcpip.Job
createdAt time.Time
@@ -561,15 +561,15 @@ type tempSLAACAddrState struct {
// slaacPrefixState holds state associated with a SLAAC prefix.
type slaacPrefixState struct {
- // Timer to deprecate the prefix.
+ // Job to deprecate the prefix.
//
// Must not be nil.
- deprecationTimer *tcpip.CancellableTimer
+ deprecationJob *tcpip.Job
- // Timer to invalidate the prefix.
+ // Job to invalidate the prefix.
//
// Must not be nil.
- invalidationTimer *tcpip.CancellableTimer
+ invalidationJob *tcpip.Job
// Nonzero only when the address is not valid forever.
validUntil time.Time
@@ -651,12 +651,12 @@ func (ndp *ndpState) startDuplicateAddressDetection(addr tcpip.Address, ref *ref
}
var done bool
- var timer *time.Timer
+ var timer tcpip.Timer
// We initially start a timer to fire immediately because some of the DAD work
// cannot be done while holding the NIC's lock. This is effectively the same
// as starting a goroutine but we use a timer that fires immediately so we can
// reset it for the next DAD iteration.
- timer = time.AfterFunc(0, func() {
+ timer = ndp.nic.stack.Clock().AfterFunc(0, func() {
ndp.nic.mu.Lock()
defer ndp.nic.mu.Unlock()
@@ -871,9 +871,9 @@ func (ndp *ndpState) handleRA(ip tcpip.Address, ra header.NDPRouterAdvert) {
case ok && rl != 0:
// This is an already discovered default router. Update
- // the invalidation timer.
- rtr.invalidationTimer.StopLocked()
- rtr.invalidationTimer.Reset(rl)
+ // the invalidation job.
+ rtr.invalidationJob.Cancel()
+ rtr.invalidationJob.Schedule(rl)
ndp.defaultRouters[ip] = rtr
case ok && rl == 0:
@@ -950,7 +950,7 @@ func (ndp *ndpState) invalidateDefaultRouter(ip tcpip.Address) {
return
}
- rtr.invalidationTimer.StopLocked()
+ rtr.invalidationJob.Cancel()
delete(ndp.defaultRouters, ip)
// Let the integrator know a discovered default router is invalidated.
@@ -979,12 +979,12 @@ func (ndp *ndpState) rememberDefaultRouter(ip tcpip.Address, rl time.Duration) {
}
state := defaultRouterState{
- invalidationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ invalidationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
ndp.invalidateDefaultRouter(ip)
}),
}
- state.invalidationTimer.Reset(rl)
+ state.invalidationJob.Schedule(rl)
ndp.defaultRouters[ip] = state
}
@@ -1009,13 +1009,13 @@ func (ndp *ndpState) rememberOnLinkPrefix(prefix tcpip.Subnet, l time.Duration)
}
state := onLinkPrefixState{
- invalidationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ invalidationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
ndp.invalidateOnLinkPrefix(prefix)
}),
}
if l < header.NDPInfiniteLifetime {
- state.invalidationTimer.Reset(l)
+ state.invalidationJob.Schedule(l)
}
ndp.onLinkPrefixes[prefix] = state
@@ -1033,7 +1033,7 @@ func (ndp *ndpState) invalidateOnLinkPrefix(prefix tcpip.Subnet) {
return
}
- s.invalidationTimer.StopLocked()
+ s.invalidationJob.Cancel()
delete(ndp.onLinkPrefixes, prefix)
// Let the integrator know a discovered on-link prefix is invalidated.
@@ -1082,14 +1082,14 @@ func (ndp *ndpState) handleOnLinkPrefixInformation(pi header.NDPPrefixInformatio
// This is an already discovered on-link prefix with a
// new non-zero valid lifetime.
//
- // Update the invalidation timer.
+ // Update the invalidation job.
- prefixState.invalidationTimer.StopLocked()
+ prefixState.invalidationJob.Cancel()
if vl < header.NDPInfiniteLifetime {
- // Prefix is valid for a finite lifetime, reset the timer to expire after
+ // Prefix is valid for a finite lifetime, schedule the job to execute after
// the new valid lifetime.
- prefixState.invalidationTimer.Reset(vl)
+ prefixState.invalidationJob.Schedule(vl)
}
ndp.onLinkPrefixes[prefix] = prefixState
@@ -1154,7 +1154,7 @@ func (ndp *ndpState) doSLAAC(prefix tcpip.Subnet, pl, vl time.Duration) {
}
state := slaacPrefixState{
- deprecationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ deprecationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
state, ok := ndp.slaacPrefixes[prefix]
if !ok {
panic(fmt.Sprintf("ndp: must have a slaacPrefixes entry for the deprecated SLAAC prefix %s", prefix))
@@ -1162,7 +1162,7 @@ func (ndp *ndpState) doSLAAC(prefix tcpip.Subnet, pl, vl time.Duration) {
ndp.deprecateSLAACAddress(state.stableAddr.ref)
}),
- invalidationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ invalidationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
state, ok := ndp.slaacPrefixes[prefix]
if !ok {
panic(fmt.Sprintf("ndp: must have a slaacPrefixes entry for the invalidated SLAAC prefix %s", prefix))
@@ -1184,19 +1184,19 @@ func (ndp *ndpState) doSLAAC(prefix tcpip.Subnet, pl, vl time.Duration) {
if !ndp.generateSLAACAddr(prefix, &state) {
// We were unable to generate an address for the prefix, we do not nothing
- // further as there is no reason to maintain state or timers for a prefix we
+ // further as there is no reason to maintain state or jobs for a prefix we
// do not have an address for.
return
}
- // Setup the initial timers to deprecate and invalidate prefix.
+ // Setup the initial jobs to deprecate and invalidate prefix.
if pl < header.NDPInfiniteLifetime && pl != 0 {
- state.deprecationTimer.Reset(pl)
+ state.deprecationJob.Schedule(pl)
}
if vl < header.NDPInfiniteLifetime {
- state.invalidationTimer.Reset(vl)
+ state.invalidationJob.Schedule(vl)
state.validUntil = now.Add(vl)
}
@@ -1428,7 +1428,7 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla
}
state := tempSLAACAddrState{
- deprecationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ deprecationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
prefixState, ok := ndp.slaacPrefixes[prefix]
if !ok {
panic(fmt.Sprintf("ndp: must have a slaacPrefixes entry for %s to deprecate temporary address %s", prefix, generatedAddr))
@@ -1441,7 +1441,7 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla
ndp.deprecateSLAACAddress(tempAddrState.ref)
}),
- invalidationTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ invalidationJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
prefixState, ok := ndp.slaacPrefixes[prefix]
if !ok {
panic(fmt.Sprintf("ndp: must have a slaacPrefixes entry for %s to invalidate temporary address %s", prefix, generatedAddr))
@@ -1454,7 +1454,7 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla
ndp.invalidateTempSLAACAddr(prefixState.tempAddrs, generatedAddr.Address, tempAddrState)
}),
- regenTimer: tcpip.NewCancellableTimer(&ndp.nic.mu, func() {
+ regenJob: ndp.nic.stack.newJob(&ndp.nic.mu, func() {
prefixState, ok := ndp.slaacPrefixes[prefix]
if !ok {
panic(fmt.Sprintf("ndp: must have a slaacPrefixes entry for %s to regenerate temporary address after %s", prefix, generatedAddr))
@@ -1481,9 +1481,9 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla
ref: ref,
}
- state.deprecationTimer.Reset(pl)
- state.invalidationTimer.Reset(vl)
- state.regenTimer.Reset(pl - ndp.configs.RegenAdvanceDuration)
+ state.deprecationJob.Schedule(pl)
+ state.invalidationJob.Schedule(vl)
+ state.regenJob.Schedule(pl - ndp.configs.RegenAdvanceDuration)
prefixState.generationAttempts++
prefixState.tempAddrs[generatedAddr.Address] = state
@@ -1518,16 +1518,16 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
prefixState.stableAddr.ref.deprecated = false
}
- // If prefix was preferred for some finite lifetime before, stop the
- // deprecation timer so it can be reset.
- prefixState.deprecationTimer.StopLocked()
+ // If prefix was preferred for some finite lifetime before, cancel the
+ // deprecation job so it can be reset.
+ prefixState.deprecationJob.Cancel()
now := time.Now()
- // Reset the deprecation timer if prefix has a finite preferred lifetime.
+ // Schedule the deprecation job if prefix has a finite preferred lifetime.
if pl < header.NDPInfiniteLifetime {
if !deprecated {
- prefixState.deprecationTimer.Reset(pl)
+ prefixState.deprecationJob.Schedule(pl)
}
prefixState.preferredUntil = now.Add(pl)
} else {
@@ -1546,9 +1546,9 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
// 3) Otherwise, reset the valid lifetime of the prefix to 2 hours.
if vl >= header.NDPInfiniteLifetime {
- // Handle the infinite valid lifetime separately as we do not keep a timer
- // in this case.
- prefixState.invalidationTimer.StopLocked()
+ // Handle the infinite valid lifetime separately as we do not schedule a
+ // job in this case.
+ prefixState.invalidationJob.Cancel()
prefixState.validUntil = time.Time{}
} else {
var effectiveVl time.Duration
@@ -1569,8 +1569,8 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
}
if effectiveVl != 0 {
- prefixState.invalidationTimer.StopLocked()
- prefixState.invalidationTimer.Reset(effectiveVl)
+ prefixState.invalidationJob.Cancel()
+ prefixState.invalidationJob.Schedule(effectiveVl)
prefixState.validUntil = now.Add(effectiveVl)
}
}
@@ -1582,7 +1582,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
}
// Note, we do not need to update the entries in the temporary address map
- // after updating the timers because the timers are held as pointers.
+ // after updating the jobs because the jobs are held as pointers.
var regenForAddr tcpip.Address
allAddressesRegenerated := true
for tempAddr, tempAddrState := range prefixState.tempAddrs {
@@ -1596,14 +1596,14 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
}
// If the address is no longer valid, invalidate it immediately. Otherwise,
- // reset the invalidation timer.
+ // reset the invalidation job.
newValidLifetime := validUntil.Sub(now)
if newValidLifetime <= 0 {
ndp.invalidateTempSLAACAddr(prefixState.tempAddrs, tempAddr, tempAddrState)
continue
}
- tempAddrState.invalidationTimer.StopLocked()
- tempAddrState.invalidationTimer.Reset(newValidLifetime)
+ tempAddrState.invalidationJob.Cancel()
+ tempAddrState.invalidationJob.Schedule(newValidLifetime)
// As per RFC 4941 section 3.3 step 4, the preferred lifetime of a temporary
// address is the lower of the preferred lifetime of the stable address or
@@ -1616,17 +1616,17 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
}
// If the address is no longer preferred, deprecate it immediately.
- // Otherwise, reset the deprecation timer.
+ // Otherwise, schedule the deprecation job again.
newPreferredLifetime := preferredUntil.Sub(now)
- tempAddrState.deprecationTimer.StopLocked()
+ tempAddrState.deprecationJob.Cancel()
if newPreferredLifetime <= 0 {
ndp.deprecateSLAACAddress(tempAddrState.ref)
} else {
tempAddrState.ref.deprecated = false
- tempAddrState.deprecationTimer.Reset(newPreferredLifetime)
+ tempAddrState.deprecationJob.Schedule(newPreferredLifetime)
}
- tempAddrState.regenTimer.StopLocked()
+ tempAddrState.regenJob.Cancel()
if tempAddrState.regenerated {
} else {
allAddressesRegenerated = false
@@ -1637,7 +1637,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat
// immediately after we finish iterating over the temporary addresses.
regenForAddr = tempAddr
} else {
- tempAddrState.regenTimer.Reset(newPreferredLifetime - ndp.configs.RegenAdvanceDuration)
+ tempAddrState.regenJob.Schedule(newPreferredLifetime - ndp.configs.RegenAdvanceDuration)
}
}
}
@@ -1717,7 +1717,7 @@ func (ndp *ndpState) cleanupSLAACAddrResourcesAndNotify(addr tcpip.AddressWithPr
ndp.cleanupSLAACPrefixResources(prefix, state)
}
-// cleanupSLAACPrefixResources cleansup a SLAAC prefix's timers and entry.
+// cleanupSLAACPrefixResources cleans up a SLAAC prefix's jobs and entry.
//
// Panics if the SLAAC prefix is not known.
//
@@ -1729,8 +1729,8 @@ func (ndp *ndpState) cleanupSLAACPrefixResources(prefix tcpip.Subnet, state slaa
}
state.stableAddr.ref = nil
- state.deprecationTimer.StopLocked()
- state.invalidationTimer.StopLocked()
+ state.deprecationJob.Cancel()
+ state.invalidationJob.Cancel()
delete(ndp.slaacPrefixes, prefix)
}
@@ -1775,13 +1775,13 @@ func (ndp *ndpState) cleanupTempSLAACAddrResourcesAndNotify(addr tcpip.AddressWi
}
// cleanupTempSLAACAddrResourcesAndNotify cleans up a temporary SLAAC address's
-// timers and entry.
+// jobs and entry.
//
// The NIC that ndp belongs to MUST be locked.
func (ndp *ndpState) cleanupTempSLAACAddrResources(tempAddrs map[tcpip.Address]tempSLAACAddrState, tempAddr tcpip.Address, tempAddrState tempSLAACAddrState) {
- tempAddrState.deprecationTimer.StopLocked()
- tempAddrState.invalidationTimer.StopLocked()
- tempAddrState.regenTimer.StopLocked()
+ tempAddrState.deprecationJob.Cancel()
+ tempAddrState.invalidationJob.Cancel()
+ tempAddrState.regenJob.Cancel()
delete(tempAddrs, tempAddr)
}
@@ -1860,7 +1860,7 @@ func (ndp *ndpState) startSolicitingRouters() {
var done bool
ndp.rtrSolicit.done = &done
- ndp.rtrSolicit.timer = time.AfterFunc(delay, func() {
+ ndp.rtrSolicit.timer = ndp.nic.stack.Clock().AfterFunc(delay, func() {
ndp.nic.mu.Lock()
if done {
// If we reach this point, it means that the RS timer fired after another
diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go
index 6f86abc98..644ba7c33 100644
--- a/pkg/tcpip/stack/ndp_test.go
+++ b/pkg/tcpip/stack/ndp_test.go
@@ -1254,7 +1254,7 @@ func TestRouterDiscovery(t *testing.T) {
default:
}
- // Wait for lladdr2's router invalidation timer to fire. The lifetime
+ // Wait for lladdr2's router invalidation job to execute. The lifetime
// of the router should have been updated to the most recent (smaller)
// lifetime.
//
@@ -1271,7 +1271,7 @@ func TestRouterDiscovery(t *testing.T) {
e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 0))
expectRouterEvent(llAddr2, false)
- // Wait for lladdr3's router invalidation timer to fire. The lifetime
+ // Wait for lladdr3's router invalidation job to execute. The lifetime
// of the router should have been updated to the most recent (smaller)
// lifetime.
//
@@ -1502,7 +1502,7 @@ func TestPrefixDiscovery(t *testing.T) {
default:
}
- // Wait for prefix2's most recent invalidation timer plus some buffer to
+ // Wait for prefix2's most recent invalidation job plus some buffer to
// expire.
select {
case e := <-ndpDisp.prefixC:
@@ -2395,7 +2395,7 @@ func TestAutoGenTempAddrRegen(t *testing.T) {
for _, addr := range tempAddrs {
// Wait for a deprecation then invalidation event, or just an invalidation
// event. We need to cover both cases but cannot deterministically hit both
- // cases because the deprecation and invalidation timers could fire in any
+ // cases because the deprecation and invalidation jobs could execute in any
// order.
select {
case e := <-ndpDisp.autoGenAddrC:
@@ -2432,9 +2432,9 @@ func TestAutoGenTempAddrRegen(t *testing.T) {
}
}
-// TestAutoGenTempAddrRegenTimerUpdates tests that a temporary address's
-// regeneration timer gets updated when refreshing the address's lifetimes.
-func TestAutoGenTempAddrRegenTimerUpdates(t *testing.T) {
+// TestAutoGenTempAddrRegenJobUpdates tests that a temporary address's
+// regeneration job gets updated when refreshing the address's lifetimes.
+func TestAutoGenTempAddrRegenJobUpdates(t *testing.T) {
const (
nicID = 1
regenAfter = 2 * time.Second
@@ -2533,7 +2533,7 @@ func TestAutoGenTempAddrRegenTimerUpdates(t *testing.T) {
//
// A new temporary address should immediately be generated since the
// regeneration time has already passed since the last address was generated
- // - this regeneration does not depend on a timer.
+ // - this regeneration does not depend on a job.
e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
expectAutoGenAddrEvent(tempAddr2, newAddr)
@@ -2559,11 +2559,11 @@ func TestAutoGenTempAddrRegenTimerUpdates(t *testing.T) {
}
// Set the maximum lifetimes for temporary addresses such that on the next
- // RA, the regeneration timer gets reset.
+ // RA, the regeneration job gets scheduled again.
//
// The maximum lifetime is the sum of the minimum lifetimes for temporary
// addresses + the time that has already passed since the last address was
- // generated so that the regeneration timer is needed to generate the next
+ // generated so that the regeneration job is needed to generate the next
// address.
newLifetimes := newMinVLDuration + regenAfter + defaultAsyncNegativeEventTimeout
ndpConfigs.MaxTempAddrValidLifetime = newLifetimes
@@ -2993,9 +2993,9 @@ func TestAutoGenAddrDeprecateFromPI(t *testing.T) {
expectPrimaryAddr(addr2)
}
-// TestAutoGenAddrTimerDeprecation tests that an address is properly deprecated
+// TestAutoGenAddrJobDeprecation tests that an address is properly deprecated
// when its preferred lifetime expires.
-func TestAutoGenAddrTimerDeprecation(t *testing.T) {
+func TestAutoGenAddrJobDeprecation(t *testing.T) {
const nicID = 1
const newMinVL = 2
newMinVLDuration := newMinVL * time.Second
@@ -3513,8 +3513,8 @@ func TestAutoGenAddrRemoval(t *testing.T) {
}
expectAutoGenAddrEvent(addr, invalidatedAddr)
- // Wait for the original valid lifetime to make sure the original timer
- // got stopped/cleaned up.
+ // Wait for the original valid lifetime to make sure the original job got
+ // cancelled/cleaned up.
select {
case <-ndpDisp.autoGenAddrC:
t.Fatal("unexpectedly received an auto gen addr event")
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 2b7ece851..a6faa22c2 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -728,6 +728,11 @@ func New(opts Options) *Stack {
return s
}
+// newJob returns a tcpip.Job using the Stack clock.
+func (s *Stack) newJob(l sync.Locker, f func()) *tcpip.Job {
+ return tcpip.NewJob(s.clock, l, f)
+}
+
// UniqueID returns a unique identifier.
func (s *Stack) UniqueID() uint64 {
return s.uniqueIDGenerator.UniqueID()
@@ -801,9 +806,10 @@ func (s *Stack) SetTransportProtocolHandler(p tcpip.TransportProtocolNumber, h f
}
}
-// NowNanoseconds implements tcpip.Clock.NowNanoseconds.
-func (s *Stack) NowNanoseconds() int64 {
- return s.clock.NowNanoseconds()
+// Clock returns the Stack's clock for retrieving the current time and
+// scheduling work.
+func (s *Stack) Clock() tcpip.Clock {
+ return s.clock
}
// Stats returns a mutable copy of the current stats.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 19:45:12 +0000