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authorKevin Krakauer <krakauer@google.com>2019-02-27 14:30:20 -0800
committerShentubot <shentubot@google.com>2019-02-27 14:31:21 -0800
commit121db29a93c651b8b62e8701bb0f16c231b08257 (patch)
treec6b235b72340de44c8ee0e9398d337a8cc6c30f3 /pkg/tcpip/transport/udp
parent6df212b831dcc3350b7677423ec7835ed40b3f22 (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/transport/udp')
-rw-r--r--pkg/tcpip/transport/udp/endpoint.go2
-rw-r--r--pkg/tcpip/transport/udp/protocol.go6
2 files changed, 7 insertions, 1 deletions
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index 05d35e526..44b9cdf6a 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -934,7 +934,7 @@ func (e *endpoint) Readiness(mask waiter.EventMask) waiter.EventMask {
// HandlePacket is called by the stack when new packets arrive to this transport
// endpoint.
-func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, vv buffer.VectorisedView) {
+func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, netHeader buffer.View, vv buffer.VectorisedView) {
// Get the header then trim it from the view.
hdr := header.UDP(vv.First())
if int(hdr.Length()) > vv.Size() {
diff --git a/pkg/tcpip/transport/udp/protocol.go b/pkg/tcpip/transport/udp/protocol.go
index b3fbed6e4..616a9f388 100644
--- a/pkg/tcpip/transport/udp/protocol.go
+++ b/pkg/tcpip/transport/udp/protocol.go
@@ -48,6 +48,12 @@ func (*protocol) NewEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolN
return newEndpoint(stack, netProto, waiterQueue), nil
}
+// NewRawEndpoint creates a new raw UDP endpoint. Raw UDP sockets are currently
+// unsupported. It implements stack.TransportProtocol.NewRawEndpoint.
+func (p *protocol) NewRawEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQueue *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) {
+ return nil, tcpip.ErrUnknownProtocol
+}
+
// MinimumPacketSize returns the minimum valid udp packet size.
func (*protocol) MinimumPacketSize() int {
return header.UDPMinimumSize