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-rw-r--r--pkg/tcpip/network/ipv6/ndp_test.go1
-rw-r--r--pkg/tcpip/stack/stack.go18
2 files changed, 13 insertions, 6 deletions
diff --git a/pkg/tcpip/network/ipv6/ndp_test.go b/pkg/tcpip/network/ipv6/ndp_test.go
index e0245487b..8edaa9508 100644
--- a/pkg/tcpip/network/ipv6/ndp_test.go
+++ b/pkg/tcpip/network/ipv6/ndp_test.go
@@ -759,6 +759,7 @@ func TestNeighborAdvertisementWithTargetLinkLayerOption(t *testing.T) {
t.Run(test.name, func(t *testing.T) {
s := stack.New(stack.Options{
NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol},
+ UseLinkAddrCache: true,
})
e := channel.New(0, 1280, linkAddr0)
e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 9390aaf57..57ad412a1 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -436,6 +436,8 @@ type Stack struct {
// useNeighborCache indicates whether ARP and NDP packets should be handled
// by the NIC's neighborCache instead of linkAddrCache.
+ //
+ // TODO(gvisor.dev/issue/4658): Remove this field.
useNeighborCache bool
// nudDisp is the NUD event dispatcher that is used to send the netstack
@@ -502,13 +504,17 @@ type Options struct {
// NUDConfigs is the default NUD configurations used by interfaces.
NUDConfigs NUDConfigurations
- // UseNeighborCache indicates whether ARP and NDP packets should be handled
- // by the Neighbor Unreachability Detection (NUD) state machine. This flag
- // also enables the APIs for inspecting and modifying the neighbor table via
- // NUDDispatcher and the following Stack methods: Neighbors, RemoveNeighbor,
- // and ClearNeighbors.
+ // UseNeighborCache is unused.
+ //
+ // TODO(gvisor.dev/issue/4658): Remove this field.
UseNeighborCache bool
+ // UseLinkAddrCache indicates that the legacy link address cache should be
+ // used for link resolution.
+ //
+ // TODO(gvisor.dev/issue/4658): Remove this field.
+ UseLinkAddrCache bool
+
// NUDDisp is the NUD event dispatcher that an integrator can provide to
// receive NUD related events.
NUDDisp NUDDispatcher
@@ -648,7 +654,7 @@ func New(opts Options) *Stack {
icmpRateLimiter: NewICMPRateLimiter(),
seed: generateRandUint32(),
nudConfigs: opts.NUDConfigs,
- useNeighborCache: opts.UseNeighborCache,
+ useNeighborCache: !opts.UseLinkAddrCache,
uniqueIDGenerator: opts.UniqueID,
nudDisp: opts.NUDDisp,
randomGenerator: mathrand.New(randSrc),