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rephrase tcp.Value methods; add Ring.FreeLimited; work on TxQueue

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soypat
2025-01-18 09:30:36 -03:00
parent 93d1f80015
commit 51ca0a95b5
5 changed files with 95 additions and 39 deletions
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tcp/control.go
+6 -6
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@@ -352,7 +352,7 @@ func (tcb *ControlBlock) validateOutgoingSegment(seg Segment) (err error) {
seglast := seg.Last()
// Extra check for when send Window is zero and no data is being sent.
zeroWindowOK := tcb.snd.WND == 0 && seg.DATALEN == 0 && seg.SEQ == tcb.snd.NXT
outOfWindow := checkSeq && !InWindow(seg.SEQ, tcb.snd.NXT, tcb.snd.WND) &&
outOfWindow := checkSeq && !seg.SEQ.InWindow(tcb.snd.NXT, tcb.snd.WND) &&
!zeroWindowOK
switch {
case tcb.state == StateClosed:
@@ -375,7 +375,7 @@ func (tcb *ControlBlock) validateOutgoingSegment(seg Segment) (err error) {
case checkSeq && tcb.snd.WND == 0 && seg.DATALEN > 0 && seg.SEQ == tcb.snd.NXT:
err = errZeroWindow
case checkSeq && !InWindow(seglast, tcb.snd.NXT, tcb.snd.WND) && !zeroWindowOK:
case checkSeq && !seglast.InWindow(tcb.snd.NXT, tcb.snd.WND) && !zeroWindowOK:
err = errLastNotInWindow
}
return err
@@ -388,8 +388,8 @@ func (tcb *ControlBlock) validateIncomingSegment(seg Segment) (err error) {
checkSEQ := !flags.HasAny(FlagSYN)
established := tcb.state == StateEstablished
preestablished := tcb.state.IsPreestablished()
acksOld := hasAck && !LessThan(tcb.snd.UNA, seg.ACK)
acksUnsentData := hasAck && !LessThanEq(seg.ACK, tcb.snd.NXT)
acksOld := hasAck && !tcb.snd.UNA.LessThan(seg.ACK)
acksUnsentData := hasAck && !seg.ACK.LessThanEq(tcb.snd.NXT)
ctlOrDataSegment := established && (seg.DATALEN > 0 || flags.HasAny(FlagFIN|FlagRST))
zeroWindowOK := tcb.rcv.WND == 0 && seg.DATALEN == 0 && seg.SEQ == tcb.rcv.NXT
// See section 3.4 of RFC 9293 for more on these checks.
@@ -402,10 +402,10 @@ func (tcb *ControlBlock) validateIncomingSegment(seg Segment) (err error) {
case checkSEQ && tcb.rcv.WND == 0 && seg.DATALEN > 0 && seg.SEQ == tcb.rcv.NXT:
err = errZeroWindow
case checkSEQ && !InWindow(seg.SEQ, tcb.rcv.NXT, tcb.rcv.WND) && !zeroWindowOK:
case checkSEQ && !seg.SEQ.InWindow(tcb.rcv.NXT, tcb.rcv.WND) && !zeroWindowOK:
err = errSeqNotInWindow
case checkSEQ && !InWindow(seg.Last(), tcb.rcv.NXT, tcb.rcv.WND) && !zeroWindowOK:
case checkSEQ && !seg.Last().InWindow(tcb.rcv.NXT, tcb.rcv.WND) && !zeroWindowOK:
err = errLastNotInWindow
case checkSEQ && seg.SEQ != tcb.rcv.NXT: