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Add support for TCP_USER_TIMEOUT option.

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The implementation follows the linux behavior where specifying
a TCP_USER_TIMEOUT will cause the resend timer to honor the
user specified timeout rather than the default rto based timeout.

Further it alters when connections are timedout due to keepalive
failures. It does not alter the behavior of when keepalives are
sent. This is as per the linux behavior.

PiperOrigin-RevId: 285099795
This commit is contained in:
Bhasker Hariharan
2019-12-11 17:52:53 -08:00
committed by gVisor bot
parent 1601e78a52
commit 6fc9f0aefd
15 changed files with 509 additions and 38 deletions
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pkg/sentry/socket/netstack/netstack.go
+23
View File
@@ -1127,6 +1127,18 @@ func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfa
return int32(time.Duration(v) / time.Second), nil
case linux.TCP_USER_TIMEOUT:
if outLen < sizeOfInt32 {
return nil, syserr.ErrInvalidArgument
}
var v tcpip.TCPUserTimeoutOption
if err := ep.GetSockOpt(&v); err != nil {
return nil, syserr.TranslateNetstackError(err)
}
return int32(time.Duration(v) / time.Millisecond), nil
case linux.TCP_INFO:
var v tcpip.TCPInfoOption
if err := ep.GetSockOpt(&v); err != nil {
@@ -1563,6 +1575,17 @@ func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *
}
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.KeepaliveIntervalOption(time.Second * time.Duration(v))))
case linux.TCP_USER_TIMEOUT:
if len(optVal) < sizeOfInt32 {
return syserr.ErrInvalidArgument
}
v := int32(usermem.ByteOrder.Uint32(optVal))
if v < 0 {
return syserr.ErrInvalidArgument
}
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.TCPUserTimeoutOption(time.Millisecond * time.Duration(v))))
case linux.TCP_CONGESTION:
v := tcpip.CongestionControlOption(optVal)
if err := ep.SetSockOpt(v); err != nil {