diff options
| author | Ghanan Gowripalan <ghanan@google.com> | 2019-12-23 08:53:57 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-12-23 08:55:25 -0800 |
| commit | 5bc4ae9d5746e65909a0bdab60e7bd598d4401c7 (patch) | |
| tree | e37564c561f2de93d46a5448cdf1b02e66445c42 /pkg/tcpip/stack/nic.go | |
| parent | d1528df71502b47bdb949798ce0abad1794b054c (diff) | |
Clear any host-specific NDP state when becoming a router
This change supports clearing all host-only NDP state when NICs become routers.
All discovered routers, discovered on-link prefixes and auto-generated addresses
will be invalidated when becoming a router. This is because normally, routers do
not process Router Advertisements to discover routers or on-link prefixes, and
do not do SLAAC.
Tests: Unittest to make sure that all discovered routers, discovered prefixes
and auto-generated addresses get invalidated when transitioning from a host to
a router.
PiperOrigin-RevId: 286902309
Diffstat (limited to 'pkg/tcpip/stack/nic.go')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index e8401c673..ddd014658 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -203,6 +203,18 @@ func (n *NIC) enable() *tcpip.Error { return err } +// becomeIPv6Router transitions n into an IPv6 router. +// +// When transitioning into an IPv6 router, host-only state (NDP discovered +// routers, discovered on-link prefixes, and auto-generated addresses) will +// be cleaned up/invalidated. +func (n *NIC) becomeIPv6Router() { + n.mu.Lock() + defer n.mu.Unlock() + + n.ndp.cleanupHostOnlyState() +} + // attachLinkEndpoint attaches the NIC to the endpoint, which will enable it // to start delivering packets. func (n *NIC) attachLinkEndpoint() { |