diff options
| author | Kevin Krakauer <krakauer@google.com> | 2019-02-27 14:30:20 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-02-27 14:31:21 -0800 |
| commit | 121db29a93c651b8b62e8701bb0f16c231b08257 (patch) | |
| tree | c6b235b72340de44c8ee0e9398d337a8cc6c30f3 /pkg/tcpip/stack/registration.go | |
| parent | 6df212b831dcc3350b7677423ec7835ed40b3f22 (diff) | |
Ping support via IPv4 raw sockets.
Broadly, this change:
* Enables sockets to be created via `socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)`.
* Passes the network-layer (IP) header up the stack to the transport endpoint,
which can pass it up to the socket layer. This allows a raw socket to return
the entire IP packet to users.
* Adds functions to stack.TransportProtocol, stack.Stack, stack.transportDemuxer
that enable incoming packets to be delivered to raw endpoints. New raw sockets
of other protocols (not ICMP) just need to register with the stack.
* Enables ping.endpoint to return IP headers when created via SOCK_RAW.
PiperOrigin-RevId: 235993280
Change-Id: I60ed994f5ff18b2cbd79f063a7fdf15d093d845a
Diffstat (limited to 'pkg/tcpip/stack/registration.go')
| -rw-r--r-- | pkg/tcpip/stack/registration.go | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index 5accffa1b..62acd5919 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -64,7 +64,7 @@ const ( type TransportEndpoint interface { // HandlePacket is called by the stack when new packets arrive to // this transport endpoint. - HandlePacket(r *Route, id TransportEndpointID, vv buffer.VectorisedView) + HandlePacket(r *Route, id TransportEndpointID, netHeader buffer.View, vv buffer.VectorisedView) // HandleControlPacket is called by the stack when new control (e.g., // ICMP) packets arrive to this transport endpoint. @@ -80,6 +80,9 @@ type TransportProtocol interface { // NewEndpoint creates a new endpoint of the transport protocol. NewEndpoint(stack *Stack, netProto tcpip.NetworkProtocolNumber, waitQueue *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) + // NewRawEndpoint creates a new raw endpoint of the transport protocol. + NewRawEndpoint(stack *Stack, netProto tcpip.NetworkProtocolNumber, waitQueue *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) + // MinimumPacketSize returns the minimum valid packet size of this // transport protocol. The stack automatically drops any packets smaller // than this targeted at this protocol. @@ -113,8 +116,9 @@ type TransportProtocol interface { // the network layer. type TransportDispatcher interface { // DeliverTransportPacket delivers packets to the appropriate - // transport protocol endpoint. - DeliverTransportPacket(r *Route, protocol tcpip.TransportProtocolNumber, vv buffer.VectorisedView) + // transport protocol endpoint. It also returns the network layer + // header for the enpoint to inspect or pass up the stack. + DeliverTransportPacket(r *Route, protocol tcpip.TransportProtocolNumber, netHeader buffer.View, vv buffer.VectorisedView) // DeliverTransportControlPacket delivers control packets to the // appropriate transport protocol endpoint. |