101 lines
4.2 KiB
Go
101 lines
4.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package netlogtype defines types for network logging.
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package netlogtype
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import (
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"net/netip"
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"time"
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"tailscale.com/tailcfg"
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"tailscale.com/types/ipproto"
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)
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// TODO(joetsai): Remove "omitempty" if "omitzero" is ever supported in both
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// the v1 and v2 "json" packages.
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// Message is the log message that captures network traffic.
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type Message struct {
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NodeID tailcfg.StableNodeID `json:"nodeId" cbor:"0,keyasint"` // e.g., "n123456CNTRL"
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Start time.Time `json:"start" cbor:"12,keyasint"` // inclusive
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End time.Time `json:"end" cbor:"13,keyasint"` // inclusive
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VirtualTraffic []ConnectionCounts `json:"virtualTraffic,omitempty" cbor:"14,keyasint,omitempty"`
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SubnetTraffic []ConnectionCounts `json:"subnetTraffic,omitempty" cbor:"15,keyasint,omitempty"`
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ExitTraffic []ConnectionCounts `json:"exitTraffic,omitempty" cbor:"16,keyasint,omitempty"`
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PhysicalTraffic []ConnectionCounts `json:"physicalTraffic,omitempty" cbor:"17,keyasint,omitempty"`
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}
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const (
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messageJSON = `{"nodeId":"n0123456789abcdefCNTRL",` + maxJSONTimeRange + `,` + minJSONTraffic + `}`
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maxJSONTimeRange = `"start":` + maxJSONRFC3339 + `,"end":` + maxJSONRFC3339
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maxJSONRFC3339 = `"0001-01-01T00:00:00.000000000Z"`
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minJSONTraffic = `"virtualTraffic":{},"subnetTraffic":{},"exitTraffic":{},"physicalTraffic":{}`
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// MaxMessageJSONSize is the overhead size of Message when it is
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// serialized as JSON assuming that each traffic map is populated.
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MaxMessageJSONSize = len(messageJSON)
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maxJSONConnCounts = `{` + maxJSONConn + `,` + maxJSONCounts + `}`
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maxJSONConn = `"proto":` + maxJSONProto + `,"src":` + maxJSONAddrPort + `,"dst":` + maxJSONAddrPort
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maxJSONProto = `255`
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maxJSONAddrPort = `"[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535"`
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maxJSONCounts = `"txPkts":` + maxJSONCount + `,"txBytes":` + maxJSONCount + `,"rxPkts":` + maxJSONCount + `,"rxBytes":` + maxJSONCount
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maxJSONCount = `18446744073709551615`
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// MaxConnectionCountsJSONSize is the maximum size of a ConnectionCounts
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// when it is serialized as JSON, assuming no superfluous whitespace.
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// It does not include the trailing comma that often appears when
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// this object is nested within an array.
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// It assumes that netip.Addr never has IPv6 zones.
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MaxConnectionCountsJSONSize = len(maxJSONConnCounts)
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maxCBORConnCounts = "\xbf" + maxCBORConn + maxCBORCounts + "\xff"
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maxCBORConn = "\x00" + maxCBORProto + "\x01" + maxCBORAddrPort + "\x02" + maxCBORAddrPort
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maxCBORProto = "\x18\xff"
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maxCBORAddrPort = "\x52\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
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maxCBORCounts = "\x0c" + maxCBORCount + "\x0d" + maxCBORCount + "\x0e" + maxCBORCount + "\x0f" + maxCBORCount
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maxCBORCount = "\x1b\xff\xff\xff\xff\xff\xff\xff\xff"
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// MaxConnectionCountsCBORSize is the maximum size of a ConnectionCounts
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// when it is serialized as CBOR.
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// It assumes that netip.Addr never has IPv6 zones.
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MaxConnectionCountsCBORSize = len(maxCBORConnCounts)
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)
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// ConnectionCounts is a flattened struct of both a connection and counts.
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type ConnectionCounts struct {
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Connection
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Counts
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}
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// Connection is a 5-tuple of proto, source and destination IP and port.
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type Connection struct {
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Proto ipproto.Proto `json:"proto,omitzero,omitempty" cbor:"0,keyasint,omitempty"`
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Src netip.AddrPort `json:"src,omitzero,omitempty" cbor:"1,keyasint,omitempty"`
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Dst netip.AddrPort `json:"dst,omitzero,omitempty" cbor:"2,keyasint,omitempty"`
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}
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func (c Connection) IsZero() bool { return c == Connection{} }
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// Counts are statistics about a particular connection.
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type Counts struct {
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TxPackets uint64 `json:"txPkts,omitzero,omitempty" cbor:"12,keyasint,omitempty"`
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TxBytes uint64 `json:"txBytes,omitzero,omitempty" cbor:"13,keyasint,omitempty"`
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RxPackets uint64 `json:"rxPkts,omitzero,omitempty" cbor:"14,keyasint,omitempty"`
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RxBytes uint64 `json:"rxBytes,omitzero,omitempty" cbor:"15,keyasint,omitempty"`
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}
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func (c Counts) IsZero() bool { return c == Counts{} }
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// Add adds the counts from both c1 and c2.
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func (c1 Counts) Add(c2 Counts) Counts {
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c1.TxPackets += c2.TxPackets
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c1.TxBytes += c2.TxBytes
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c1.RxPackets += c2.RxPackets
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c1.RxBytes += c2.RxBytes
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return c1
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}
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