75 lines
1.3 KiB
Go
75 lines
1.3 KiB
Go
package tun
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import "net/netip"
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type FlowVerdict struct {
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Action FlowAction
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Port Port
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Destination netip.AddrPort
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NewTracker func() FlowTracker
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}
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type FlowAction uint8
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const (
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ActionAccept FlowAction = iota
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ActionFlow
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ActionReject
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ActionDrop
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ActionBypass
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)
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type FlowTracker interface {
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AttachFlow(handle FlowHandle)
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CountForward(n int)
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CountReverse(n int)
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FlowEstablished()
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CloseFlow(reason FlowCloseReason)
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}
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type FlowHandle interface {
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CloseFlow()
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}
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type FlowCloseReason uint8
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const (
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FlowCloseReset FlowCloseReason = iota
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FlowCloseFinished
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FlowCloseTimeout
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FlowCloseEvicted
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FlowCloseShutdown
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FlowCloseInterrupted
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)
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func (r FlowCloseReason) String() string {
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switch r {
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case FlowCloseReset:
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return "connection reset"
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case FlowCloseFinished:
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return "finished"
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case FlowCloseTimeout:
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return "idle timeout"
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case FlowCloseEvicted:
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return "evicted"
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case FlowCloseShutdown:
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return "stack closed"
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case FlowCloseInterrupted:
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return "interrupted"
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default:
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return "unknown"
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}
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}
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type Port interface {
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PortAddresses() (v4 netip.Addr, v6 netip.Addr)
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PortMTU() uint32
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AttachReturn(returnPath Return) error
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DetachReturn(returnPath Return) error
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WritePackets(packets [][]byte) error
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}
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type Return interface {
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ReturnHeadroom() int
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ReturnPackets(packets [][]byte) [][]byte
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}
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