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keep working on xnet TCP

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This commit is contained in:
Patricio Whittingslow
2025-10-23 21:18:25 -03:00
parent 7ac4d556c2
commit 92a245957b
5 changed files with 203 additions and 61 deletions
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tcp/handler.go
+12 -1
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@@ -177,6 +177,12 @@ func (h *Handler) Recv(incomingPacket []byte) error {
}
return err
}
if h.scb.State() == StateClosed {
// TCB aborted, likely because it received an ACK in LastAck state.
// Clean up connection now.
h.reset(0, 0, 0)
return net.ErrClosed
}
if prevState != h.scb.State() {
h.info("tcp.Handler:rx-statechange", slog.Uint64("port", uint64(h.localPort)), slog.String("old", prevState.String()), slog.String("new", h.scb.State().String()), slog.String("rxflags", segIncoming.Flags.String()))
}
@@ -269,7 +275,12 @@ func (h *Handler) Send(b []byte) (int, error) {
tfrm.SetDestinationPort(h.remotePort)
tfrm.SetSegment(segment, offset)
tfrm.SetUrgentPtr(0)
return int(offset)*4 + int(segment.DATALEN), nil
datalen := int(offset)*4 + int(segment.DATALEN)
closedSuccess := prevState == StateTimeWait && segment.Flags.HasAny(FlagACK)
if closedSuccess {
h.reset(0, 0, 0)
}
return datalen, nil
}
// FreeTx returns the amount of space free in the transmit buffer. A call to [Handler.Write] with a larger buffer will fail.