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rewrite ControlBlock.Open to only open passive connections; now use Send for active connections

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soypat
2025-02-13 22:56:27 -03:00
parent 0cb43c47a4
commit bbd74d04d8
6 changed files with 88 additions and 29 deletions
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tcp/handler.go
+10 -8
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@@ -53,7 +53,7 @@ func (h *Handler) LocalPort() uint16 {
func (h *Handler) Open(state State, localPort, remotePort uint16, iss Value) error {
// Open will fail unless SCB in closed state.
err := h.scb.Open(iss, Size(h.bufRx.Size()), state)
err := h.scb.Open(iss, Size(h.bufRx.Size()))
if err != nil {
return err
}
@@ -156,13 +156,15 @@ func (h *Handler) Send(b []byte) (int, error) {
// No pending control segment or data to send. Yield.
return 0, nil
}
n, seq, err := h.bufTx.MakePacket(b[sizeHeaderTCP : sizeHeaderTCP+segment.DATALEN])
if err != nil {
return 0, err
} else if seq != segment.SEQ {
panic("mismatching sequence numbers")
} else if n != int(segment.DATALEN) {
panic("expected n == available")
if available > 0 {
n, seq, err := h.bufTx.MakePacket(b[sizeHeaderTCP : sizeHeaderTCP+segment.DATALEN])
if err != nil {
return 0, err
} else if seq != segment.SEQ {
panic("mismatching sequence numbers")
} else if n != int(segment.DATALEN) {
panic("expected n == available")
}
}
}
prevState := h.scb.State()