diff options
| author | Ian Gudger <igudger@google.com> | 2019-03-08 15:48:16 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-03-08 15:49:17 -0800 |
| commit | 56a61282953b46c8f8b707d5948a2d3958dced0c (patch) | |
| tree | 2336f9f92e227d5f43bbad81cee80c527573a6a2 /pkg/tcpip/stack/registration.go | |
| parent | 832589cb076a638ca53076ebb66afb9fac4597d1 (diff) | |
Implement IP_MULTICAST_LOOP.
IP_MULTICAST_LOOP controls whether or not multicast packets sent on the default
route are looped back. In order to implement this switch, support for sending
and looping back multicast packets on the default route had to be implemented.
For now we only support IPv4 multicast.
PiperOrigin-RevId: 237534603
Change-Id: I490ac7ff8e8ebef417c7eb049a919c29d156ac1c
Diffstat (limited to 'pkg/tcpip/stack/registration.go')
| -rw-r--r-- | pkg/tcpip/stack/registration.go | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index 62acd5919..cf4d52fe9 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -125,6 +125,18 @@ type TransportDispatcher interface { DeliverTransportControlPacket(local, remote tcpip.Address, net tcpip.NetworkProtocolNumber, trans tcpip.TransportProtocolNumber, typ ControlType, extra uint32, vv buffer.VectorisedView) } +// PacketLooping specifies where an outbound packet should be sent. +type PacketLooping byte + +const ( + // PacketOut indicates that the packet should be passed to the link + // endpoint. + PacketOut PacketLooping = 1 << iota + + // PacketLoop indicates that the packet should be handled locally. + PacketLoop +) + // NetworkEndpoint is the interface that needs to be implemented by endpoints // of network layer protocols (e.g., ipv4, ipv6). type NetworkEndpoint interface { @@ -149,7 +161,7 @@ type NetworkEndpoint interface { // WritePacket writes a packet to the given destination address and // protocol. - WritePacket(r *Route, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber, ttl uint8) *tcpip.Error + WritePacket(r *Route, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber, ttl uint8, loop PacketLooping) *tcpip.Error // ID returns the network protocol endpoint ID. ID() *NetworkEndpointID |