diff options
Diffstat (limited to 'pkg/tcpip/stack/stack.go')
| -rw-r--r-- | pkg/tcpip/stack/stack.go | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go index f67975525..a199bc1cc 100644 --- a/pkg/tcpip/stack/stack.go +++ b/pkg/tcpip/stack/stack.go @@ -399,6 +399,9 @@ type Stack struct { // // TODO(gvisor.dev/issue/940): S/R this field. portSeed uint32 + + // ndpConfigs is the NDP configurations used by interfaces. + ndpConfigs NDPConfigurations } // Options contains optional Stack configuration. @@ -425,6 +428,13 @@ type Options struct { // UnassociatedFactory produces unassociated endpoints raw endpoints. // Raw endpoints are enabled only if this is non-nil. UnassociatedFactory UnassociatedEndpointFactory + + // NDPConfigs is the NDP configurations used by interfaces. + // + // By default, NDPConfigs will have a zero value for its + // DupAddrDetectTransmits field, implying that DAD will not be performed + // before assigning an address to a NIC. + NDPConfigs NDPConfigurations } // TransportEndpointInfo holds useful information about a transport endpoint @@ -458,6 +468,9 @@ func (*TransportEndpointInfo) IsEndpointInfo() {} // New allocates a new networking stack with only the requested networking and // transport protocols configured with default options. // +// Note, NDPConfigurations will be fixed before being used by the Stack. That +// is, if an invalid value was provided, it will be reset to the default value. +// // Protocol options can be changed by calling the // SetNetworkProtocolOption/SetTransportProtocolOption methods provided by the // stack. Please refer to individual protocol implementations as to what options @@ -468,6 +481,9 @@ func New(opts Options) *Stack { clock = &tcpip.StdClock{} } + // Make sure opts.NDPConfigs contains valid values only. + opts.NDPConfigs.validate() + s := &Stack{ transportProtocols: make(map[tcpip.TransportProtocolNumber]*transportProtocolState), networkProtocols: make(map[tcpip.NetworkProtocolNumber]NetworkProtocol), @@ -480,6 +496,7 @@ func New(opts Options) *Stack { handleLocal: opts.HandleLocal, icmpRateLimiter: NewICMPRateLimiter(), portSeed: generateRandUint32(), + ndpConfigs: opts.NDPConfigs, } // Add specified network protocols. @@ -1238,6 +1255,37 @@ func (s *Stack) AllowICMPMessage() bool { return s.icmpRateLimiter.Allow() } +// IsAddrTentative returns true if addr is tentative on the NIC with ID id. +// +// Note that if addr is not associated with a NIC with id ID, then this +// function will return false. It will only return true if the address is +// associated with the NIC AND it is tentative. +func (s *Stack) IsAddrTentative(id tcpip.NICID, addr tcpip.Address) (bool, *tcpip.Error) { + s.mu.RLock() + defer s.mu.RUnlock() + + nic, ok := s.nics[id] + if !ok { + return false, tcpip.ErrUnknownNICID + } + + return nic.isAddrTentative(addr), nil +} + +// DupTentativeAddrDetected attempts to inform the NIC with ID id that a +// tentative addr on it is a duplicate on a link. +func (s *Stack) DupTentativeAddrDetected(id tcpip.NICID, addr tcpip.Address) *tcpip.Error { + s.mu.Lock() + defer s.mu.Unlock() + + nic, ok := s.nics[id] + if !ok { + return tcpip.ErrUnknownNICID + } + + return nic.dupTentativeAddrDetected(addr) +} + // PortSeed returns a 32 bit value that can be used as a seed value for port // picking. // |