diff options
| author | Ghanan Gowripalan <ghanan@google.com> | 2021-01-27 19:06:47 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-01-27 19:08:51 -0800 |
| commit | b85b23e50d1c264ff4821e182ad89a8ea3d0e0c5 (patch) | |
| tree | 9180366b5d4106e048b41fd1d34a436be6719d0f /pkg/tcpip/stack/nud.go | |
| parent | 1d22284c13cc040e52c2130386c10d8f84f6bbd6 (diff) | |
Confirm neighbor reachability with TCP ACKs
As per RFC 4861 section 7.3.1,
A neighbor is considered reachable if the node has recently received
a confirmation that packets sent recently to the neighbor were
received by its IP layer. Positive confirmation can be gathered in
two ways: hints from upper-layer protocols that indicate a connection
is making "forward progress", or receipt of a Neighbor Advertisement
message that is a response to a Neighbor Solicitation message.
This change adds support for TCP to let the IP/link layers know that a
neighbor is reachable.
Test: integration_test.TestTCPConfirmNeighborReachability
PiperOrigin-RevId: 354222833
Diffstat (limited to 'pkg/tcpip/stack/nud.go')
| -rw-r--r-- | pkg/tcpip/stack/nud.go | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/pkg/tcpip/stack/nud.go b/pkg/tcpip/stack/nud.go index 12d67409a..77926e289 100644 --- a/pkg/tcpip/stack/nud.go +++ b/pkg/tcpip/stack/nud.go @@ -174,10 +174,6 @@ type NUDHandler interface { // HandleConfirmation processes an incoming neighbor confirmation (e.g. ARP // reply or Neighbor Advertisement for ARP or NDP, respectively). HandleConfirmation(addr tcpip.Address, linkAddr tcpip.LinkAddress, flags ReachabilityConfirmationFlags) - - // HandleUpperLevelConfirmation processes an incoming upper-level protocol - // (e.g. TCP acknowledgements) reachability confirmation. - HandleUpperLevelConfirmation(addr tcpip.Address) } // NUDConfigurations is the NUD configurations for the netstack. This is used |