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| author | Ghanan Gowripalan <ghanan@google.com> | 2020-01-15 16:43:36 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-01-15 17:10:48 -0800 |
| commit | 815df2959a76e4a19f5882e40402b9bbca9e70be (patch) | |
| tree | c06233aaeef5158198bdfb8223c3548d42574573 /pkg/tcpip/stack/stack.go | |
| parent | d6fb1ec6c7c76040dd20e915b32f9ed795ae7077 (diff) | |
Solicit IPv6 routers when a NIC becomes enabled as a host
This change adds support to send NDP Router Solicitation messages when a NIC
becomes enabled as a host, as per RFC 4861 section 6.3.7.
Note, Router Solicitations will only be sent when the stack has forwarding
disabled.
Tests: Unittests to make sure that the initial Router Solicitations are sent
as configured. The tests also validate the sent Router Solicitations' fields.
PiperOrigin-RevId: 289964095
Diffstat (limited to 'pkg/tcpip/stack/stack.go')
| -rw-r--r-- | pkg/tcpip/stack/stack.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go index 386eb6eec..fc56a6d79 100644 --- a/pkg/tcpip/stack/stack.go +++ b/pkg/tcpip/stack/stack.go @@ -750,7 +750,9 @@ func (s *Stack) Stats() tcpip.Stats { // SetForwarding enables or disables the packet forwarding between NICs. // // When forwarding becomes enabled, any host-only state on all NICs will be -// cleaned up. +// cleaned up and if IPv6 is enabled, NDP Router Solicitations will be started. +// When forwarding becomes disabled and if IPv6 is enabled, NDP Router +// Solicitations will be stopped. func (s *Stack) SetForwarding(enable bool) { // TODO(igudger, bgeffon): Expose via /proc/sys/net/ipv4/ip_forward. s.mu.Lock() @@ -772,6 +774,10 @@ func (s *Stack) SetForwarding(enable bool) { for _, nic := range s.nics { nic.becomeIPv6Router() } + } else { + for _, nic := range s.nics { + nic.becomeIPv6Host() + } } } |