mirror of
https://github.com/cbeuw/Cloak.git
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67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package multiplex
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import (
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"sync/atomic"
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"github.com/juju/ratelimit"
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)
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// Valve needs to be universal, across all sessions that belong to a user
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type LimitedValve struct {
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// traffic directions from the server's perspective are referred
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// exclusively as rx and tx.
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// rx is from client to server, tx is from server to client
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// DO NOT use terms up or down as this is used in usermanager
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// for bandwidth limiting
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rxtb *ratelimit.Bucket
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txtb *ratelimit.Bucket
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rx *int64
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tx *int64
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}
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type UnlimitedValve struct{}
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func MakeValve(rxRate, txRate int64) *LimitedValve {
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var rx, tx int64
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v := &LimitedValve{
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rxtb: ratelimit.NewBucketWithRate(float64(rxRate), rxRate),
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txtb: ratelimit.NewBucketWithRate(float64(txRate), txRate),
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rx: &rx,
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tx: &tx,
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}
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return v
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}
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var UNLIMITED_VALVE = &UnlimitedValve{}
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func (v *LimitedValve) rxWait(n int) { v.rxtb.Wait(int64(n)) }
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func (v *LimitedValve) txWait(n int) { v.txtb.Wait(int64(n)) }
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func (v *LimitedValve) AddRx(n int64) { atomic.AddInt64(v.rx, n) }
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func (v *LimitedValve) AddTx(n int64) { atomic.AddInt64(v.tx, n) }
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func (v *LimitedValve) GetRx() int64 { return atomic.LoadInt64(v.rx) }
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func (v *LimitedValve) GetTx() int64 { return atomic.LoadInt64(v.tx) }
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func (v *LimitedValve) Nullify() (int64, int64) {
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rx := atomic.SwapInt64(v.rx, 0)
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tx := atomic.SwapInt64(v.tx, 0)
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return rx, tx
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}
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func (v *UnlimitedValve) rxWait(n int) {}
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func (v *UnlimitedValve) txWait(n int) {}
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func (v *UnlimitedValve) AddRx(n int64) {}
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func (v *UnlimitedValve) AddTx(n int64) {}
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func (v *UnlimitedValve) GetRx() int64 { return 0 }
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func (v *UnlimitedValve) GetTx() int64 { return 0 }
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func (v *UnlimitedValve) Nullify() (int64, int64) { return 0, 0 }
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type Valve interface {
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rxWait(n int)
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txWait(n int)
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AddRx(n int64)
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AddTx(n int64)
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GetRx() int64
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GetTx() int64
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Nullify() (int64, int64)
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}
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