diff options
Diffstat (limited to 'pkg/tcpip/transport/tcp/accept.go')
| -rw-r--r-- | pkg/tcpip/transport/tcp/accept.go | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/pkg/tcpip/transport/tcp/accept.go b/pkg/tcpip/transport/tcp/accept.go index 9b1ad6a28..52fd1bfa3 100644 --- a/pkg/tcpip/transport/tcp/accept.go +++ b/pkg/tcpip/transport/tcp/accept.go @@ -213,6 +213,7 @@ func (l *listenContext) createConnectingEndpoint(s *segment, iss seqnum.Value, i n.route = s.route.Clone() n.effectiveNetProtos = []tcpip.NetworkProtocolNumber{s.route.NetProto} n.rcvBufSize = int(l.rcvWnd) + n.amss = mssForRoute(&n.route) n.maybeEnableTimestamp(rcvdSynOpts) n.maybeEnableSACKPermitted(rcvdSynOpts) @@ -232,7 +233,11 @@ func (l *listenContext) createConnectingEndpoint(s *segment, iss seqnum.Value, i // The receiver at least temporarily has a zero receive window scale, // but the caller may change it (before starting the protocol loop). n.snd = newSender(n, iss, irs, s.window, rcvdSynOpts.MSS, rcvdSynOpts.WS) - n.rcv = newReceiver(n, irs, l.rcvWnd, 0) + n.rcv = newReceiver(n, irs, seqnum.Size(n.initialReceiveWindow()), 0, seqnum.Size(n.receiveBufferSize())) + // Bootstrap the auto tuning algorithm. Starting at zero will result in + // a large step function on the first window adjustment causing the + // window to grow to a really large value. + n.rcvAutoParams.prevCopied = n.initialReceiveWindow() return n, nil } @@ -249,7 +254,7 @@ func (l *listenContext) createEndpointAndPerformHandshake(s *segment, opts *head } // Perform the 3-way handshake. - h := newHandshake(ep, l.rcvWnd) + h := newHandshake(ep, seqnum.Size(ep.initialReceiveWindow())) h.resetToSynRcvd(cookie, irs, opts) if err := h.execute(); err != nil { @@ -359,16 +364,19 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) { return } cookie := ctx.createCookie(s.id, s.sequenceNumber, encodeMSS(opts.MSS)) - // Send SYN with window scaling because we currently + + // Send SYN without window scaling because we currently // dont't encode this information in the cookie. // // Enable Timestamp option if the original syn did have // the timestamp option specified. + mss := mssForRoute(&s.route) synOpts := header.TCPSynOptions{ WS: -1, TS: opts.TS, TSVal: tcpTimeStamp(timeStampOffset()), TSEcr: opts.TSVal, + MSS: uint16(mss), } sendSynTCP(&s.route, s.id, header.TCPFlagSyn|header.TCPFlagAck, cookie, s.sequenceNumber+1, ctx.rcvWnd, synOpts) e.stack.Stats().TCP.ListenOverflowSynCookieSent.Increment() |