Matthias Radestock
5ccc753367
The weave protocol already effectively performs heartbeating - FetchAll is performed at regular intervals. Hence we can detect stale connections by the lack of receiving any data for approximately that interval (we use x2). We use the same interval to set a time limit on the handshake too, and any subsequent interactions prior to the connection being fully established. Fixes #272.
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
package router
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import (
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"math"
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"time"
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)
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const (
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Protocol = "weave"
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ProtocolVersion = 8
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EthernetOverhead = 14
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UDPOverhead = 28 // 20 bytes for IPv4, 8 bytes for UDP
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Port = 6783
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HttpPort = Port + 1
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DefaultPMTU = 65535
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MaxUDPPacketSize = 65536
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ChannelSize = 16
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UDPNonceSendAt = 8192
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FragTestSize = 60001
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PMTUDiscoverySize = 60000
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FastHeartbeat = 500 * time.Millisecond
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SlowHeartbeat = 10 * time.Second
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FetchAllInterval = 30 * time.Second
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FragTestInterval = 5 * time.Minute
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ReadTimeout = 2 * FetchAllInterval
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PMTUVerifyAttempts = 8
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PMTUVerifyTimeout = 10 * time.Millisecond // gets doubled with every attempt
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MaxDuration = time.Duration(math.MaxInt64)
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)
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const (
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ProtocolConnectionEstablished = iota
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ProtocolFragmentationReceived = iota
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ProtocolStartFragmentationTest = iota
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ProtocolNonce = iota
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ProtocolFetchAll = iota
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ProtocolUpdate = iota
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ProtocolPMTUVerified = iota
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)
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var (
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FragTest = make([]byte, FragTestSize)
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PMTUDiscovery = make([]byte, PMTUDiscoverySize)
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ProtocolConnectionEstablishedByte = []byte{ProtocolConnectionEstablished}
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ProtocolFragmentationReceivedByte = []byte{ProtocolFragmentationReceived}
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ProtocolStartFragmentationTestByte = []byte{ProtocolStartFragmentationTest}
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ProtocolNonceByte = []byte{ProtocolNonce}
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ProtocolFetchAllByte = []byte{ProtocolFetchAll}
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ProtocolUpdateByte = []byte{ProtocolUpdate}
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ProtocolPMTUVerifiedByte = []byte{ProtocolPMTUVerified}
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)
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