From 12235d533ae5c8b4b03c6d7f24cae785a2d6ec22 Mon Sep 17 00:00:00 2001 From: Kevin Krakauer Date: Mon, 21 Oct 2019 13:21:58 -0700 Subject: AF_PACKET support for netstack (aka epsocket). Like (AF_INET, SOCK_RAW) sockets, AF_PACKET sockets require CAP_NET_RAW. With runsc, you'll need to pass `--net-raw=true` to enable them. Binding isn't supported yet. PiperOrigin-RevId: 275909366 --- pkg/tcpip/link/sharedmem/sharedmem.go | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'pkg/tcpip/link/sharedmem/sharedmem.go') diff --git a/pkg/tcpip/link/sharedmem/sharedmem.go b/pkg/tcpip/link/sharedmem/sharedmem.go index 9e71d4edf..4393403c5 100644 --- a/pkg/tcpip/link/sharedmem/sharedmem.go +++ b/pkg/tcpip/link/sharedmem/sharedmem.go @@ -212,6 +212,21 @@ func (e *endpoint) WritePacket(r *stack.Route, _ *stack.GSO, hdr buffer.Prependa return nil } +// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket. +func (e *endpoint) WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error { + v := packet.ToView() + // Transmit the packet. + e.mu.Lock() + ok := e.tx.transmit(v, buffer.View{}) + e.mu.Unlock() + + if !ok { + return tcpip.ErrWouldBlock + } + + return nil +} + // dispatchLoop reads packets from the rx queue in a loop and dispatches them // to the network stack. func (e *endpoint) dispatchLoop(d stack.NetworkDispatcher) { @@ -254,7 +269,7 @@ func (e *endpoint) dispatchLoop(d stack.NetworkDispatcher) { // Send packet up the stack. eth := header.Ethernet(b) - d.DeliverNetworkPacket(e, eth.SourceAddress(), eth.DestinationAddress(), eth.Type(), buffer.View(b[header.EthernetMinimumSize:]).ToVectorisedView()) + d.DeliverNetworkPacket(e, eth.SourceAddress(), eth.DestinationAddress(), eth.Type(), buffer.View(b[header.EthernetMinimumSize:]).ToVectorisedView(), buffer.View(eth)) } // Clean state. -- cgit v1.2.3