diff options
| author | Bhasker Hariharan <bhaskerh@google.com> | 2019-07-12 13:34:06 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-07-12 13:35:17 -0700 |
| commit | 6116473b2ffdea90a4a97196e265c6d93e53ce00 (patch) | |
| tree | 74bd41319077af4042bd95cb9a7019869f0fe3a6 /pkg/sentry/socket | |
| parent | 8f11e257c9fbbde4ea2232f54313812a4c4a1fe9 (diff) | |
Stub out support for TCP_MAXSEG.
Adds support to set/get the TCP_MAXSEG value but does not
really change the segment sizes emitted by netstack or
alter the MSS advertised by the endpoint. This is currently
being added only to unblock iperf3 on gVisor. Plumbing
this correctly requires a bit more work which will come
in separate CLs.
PiperOrigin-RevId: 257859112
Diffstat (limited to 'pkg/sentry/socket')
| -rw-r--r-- | pkg/sentry/socket/epsocket/epsocket.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/pkg/sentry/socket/epsocket/epsocket.go b/pkg/sentry/socket/epsocket/epsocket.go index 9d1bcfd41..69eff7373 100644 --- a/pkg/sentry/socket/epsocket/epsocket.go +++ b/pkg/sentry/socket/epsocket/epsocket.go @@ -867,6 +867,18 @@ func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfa return int32(v), nil + case linux.TCP_MAXSEG: + if outLen < sizeOfInt32 { + return nil, syserr.ErrInvalidArgument + } + + var v tcpip.MaxSegOption + if err := ep.GetSockOpt(&v); err != nil { + return nil, syserr.TranslateNetstackError(err) + } + + return int32(v), nil + case linux.TCP_KEEPIDLE: if outLen < sizeOfInt32 { return nil, syserr.ErrInvalidArgument @@ -1219,6 +1231,14 @@ func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) * v := usermem.ByteOrder.Uint32(optVal) return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.QuickAckOption(v))) + case linux.TCP_MAXSEG: + if len(optVal) < sizeOfInt32 { + return syserr.ErrInvalidArgument + } + + v := usermem.ByteOrder.Uint32(optVal) + return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.MaxSegOption(v))) + case linux.TCP_KEEPIDLE: if len(optVal) < sizeOfInt32 { return syserr.ErrInvalidArgument |