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Stub support for TCP_SYNCNT and TCP_WINDOW_CLAMP.

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This change adds support for TCP_SYNCNT and TCP_WINDOW_CLAMP options
in GetSockOpt/SetSockOpt. This change does not really change any
behaviour in Netstack and only stores/returns the stored value.

Actual honoring of these options will be added as required.

Fixes #2626, #2625

PiperOrigin-RevId: 311453777
This commit is contained in:
Bhasker Hariharan
2020-05-13 19:49:09 -07:00
committed by gVisor bot
parent 64afaf0e9b
commit 8b8774d715
6 changed files with 367 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/sentry/socket/netstack/netstack.go
+39
View File
@@ -1321,6 +1321,29 @@ func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfa
return int32(time.Duration(v) / time.Second), nil
case linux.TCP_SYNCNT:
if outLen < sizeOfInt32 {
return nil, syserr.ErrInvalidArgument
}
v, err := ep.GetSockOptInt(tcpip.TCPSynCountOption)
if err != nil {
return nil, syserr.TranslateNetstackError(err)
}
return int32(v), nil
case linux.TCP_WINDOW_CLAMP:
if outLen < sizeOfInt32 {
return nil, syserr.ErrInvalidArgument
}
v, err := ep.GetSockOptInt(tcpip.TCPWindowClampOption)
if err != nil {
return nil, syserr.TranslateNetstackError(err)
}
return int32(v), nil
default:
emitUnimplementedEventTCP(t, name)
}
@@ -1790,6 +1813,22 @@ func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *
}
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.TCPDeferAcceptOption(time.Second * time.Duration(v))))
case linux.TCP_SYNCNT:
if len(optVal) < sizeOfInt32 {
return syserr.ErrInvalidArgument
}
v := usermem.ByteOrder.Uint32(optVal)
return syserr.TranslateNetstackError(ep.SetSockOptInt(tcpip.TCPSynCountOption, int(v)))
case linux.TCP_WINDOW_CLAMP:
if len(optVal) < sizeOfInt32 {
return syserr.ErrInvalidArgument
}
v := usermem.ByteOrder.Uint32(optVal)
return syserr.TranslateNetstackError(ep.SetSockOptInt(tcpip.TCPWindowClampOption, int(v)))
case linux.TCP_REPAIR_OPTIONS:
t.Kernel().EmitUnimplementedEvent(t)