From 8dbeac53ce1b3c1cf4a5f2f0ccdd7196f4656fd8 Mon Sep 17 00:00:00 2001 From: gVisor bot Date: Fri, 26 Jun 2020 17:49:32 -0700 Subject: Implement SO_NO_CHECK socket option. SO_NO_CHECK is used to skip the UDP checksum generation on a TX socket (UDP checksum is optional on IPv4). Test: - TestNoChecksum - SoNoCheckOffByDefault (UdpSocketTest) - SoNoCheck (UdpSocketTest) Fixes #3055 PiperOrigin-RevId: 318575215 --- pkg/sentry/socket/netstack/netstack.go | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'pkg/sentry/socket/netstack/netstack.go') diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go index c0b63a803..e7d2c83d7 100644 --- a/pkg/sentry/socket/netstack/netstack.go +++ b/pkg/sentry/socket/netstack/netstack.go @@ -1169,6 +1169,17 @@ func getSockOptSocket(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, fam return int32(v), nil + case linux.SO_NO_CHECK: + if outLen < sizeOfInt32 { + return nil, syserr.ErrInvalidArgument + } + + v, err := ep.GetSockOptBool(tcpip.NoChecksumOption) + if err != nil { + return nil, syserr.TranslateNetstackError(err) + } + return boolToInt32(v), nil + default: socket.GetSockOptEmitUnimplementedEvent(t, name) } @@ -1720,6 +1731,14 @@ func setSockOptSocket(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, nam return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.OutOfBandInlineOption(v))) + case linux.SO_NO_CHECK: + if len(optVal) < sizeOfInt32 { + return syserr.ErrInvalidArgument + } + + v := usermem.ByteOrder.Uint32(optVal) + return syserr.TranslateNetstackError(ep.SetSockOptBool(tcpip.NoChecksumOption, v != 0)) + case linux.SO_LINGER: if len(optVal) < linux.SizeOfLinger { return syserr.ErrInvalidArgument -- cgit v1.2.3