diff options
Diffstat (limited to 'pkg/tcpip/stack/nic.go')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index ab7e1d859..29d580e76 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -97,6 +97,8 @@ type packetEndpointList struct { mu sync.RWMutex // eps is protected by mu, but the contained PacketEndpoint values are not. + // + // +checklocks:mu eps []PacketEndpoint } @@ -117,6 +119,12 @@ func (p *packetEndpointList) remove(ep PacketEndpoint) { } } +func (p *packetEndpointList) len() int { + p.mu.RLock() + defer p.mu.RUnlock() + return len(p.eps) +} + // forEach calls fn with each endpoints in p while holding the read lock on p. func (p *packetEndpointList) forEach(fn func(PacketEndpoint)) { p.mu.RLock() @@ -157,14 +165,8 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, ctx NICC resolutionRequired := ep.Capabilities()&CapabilityResolutionRequired != 0 - // Register supported packet and network endpoint protocols. - for _, netProto := range header.Ethertypes { - nic.packetEPs.eps[netProto] = new(packetEndpointList) - } for _, netProto := range stack.networkProtocols { netNum := netProto.Number() - nic.packetEPs.eps[netNum] = new(packetEndpointList) - netEP := netProto.NewEndpoint(nic, nic) nic.networkEndpoints[netNum] = netEP @@ -974,7 +976,8 @@ func (n *nic) registerPacketEndpoint(netProto tcpip.NetworkProtocolNumber, ep Pa eps, ok := n.packetEPs.eps[netProto] if !ok { - return &tcpip.ErrNotSupported{} + eps = new(packetEndpointList) + n.packetEPs.eps[netProto] = eps } eps.add(ep) @@ -990,6 +993,9 @@ func (n *nic) unregisterPacketEndpoint(netProto tcpip.NetworkProtocolNumber, ep return } eps.remove(ep) + if eps.len() == 0 { + delete(n.packetEPs.eps, netProto) + } } // isValidForOutgoing returns true if the endpoint can be used to send out a |