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| author | Nayana Bidari <nybidari@google.com> | 2021-01-27 16:11:49 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-01-27 16:14:50 -0800 |
| commit | 99988e45ed651f64e16e2f2663b06b4a1eee50d4 (patch) | |
| tree | b5e4682669273698d6c84fbec56ace958afcf43a /pkg/sentry/socket/netstack | |
| parent | cdf49c4433a83d9be6e8a3fb8b09bf457661d39f (diff) | |
Add support for more fields in netstack for TCP_INFO
This CL adds support for the following fields:
- RTT, RTTVar, RTO
- send congestion window (sndCwnd) and send slow start threshold (sndSsthresh)
- congestion control state(CaState)
- ReorderSeen
PiperOrigin-RevId: 354195361
Diffstat (limited to 'pkg/sentry/socket/netstack')
| -rw-r--r-- | pkg/sentry/socket/netstack/netstack.go | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go index 7065a0e46..3115a227d 100644 --- a/pkg/sentry/socket/netstack/netstack.go +++ b/pkg/sentry/socket/netstack/netstack.go @@ -1098,6 +1098,29 @@ func getSockOptTCP(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name, // TODO(b/64800844): Translate fields once they are added to // tcpip.TCPInfoOption. info := linux.TCPInfo{} + switch v.CcState { + case tcpip.RTORecovery: + info.CaState = linux.TCP_CA_Loss + case tcpip.FastRecovery, tcpip.SACKRecovery: + info.CaState = linux.TCP_CA_Recovery + case tcpip.Disorder: + info.CaState = linux.TCP_CA_Disorder + case tcpip.Open: + info.CaState = linux.TCP_CA_Open + } + info.RTO = uint32(v.RTO / time.Microsecond) + info.RTT = uint32(v.RTT / time.Microsecond) + info.RTTVar = uint32(v.RTTVar / time.Microsecond) + info.SndSsthresh = v.SndSsthresh + info.SndCwnd = v.SndCwnd + + // In netstack reorderSeen is updated only when RACK is enabled. + // We only track whether the reordering is seen, which is + // different than Linux where reorderSeen is not specific to + // RACK and is incremented when a reordering event is seen. + if v.ReorderSeen { + info.ReordSeen = 1 + } // Linux truncates the output binary to outLen. buf := t.CopyScratchBuffer(info.SizeBytes()) |