/
metrics.go
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/
metrics.go
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package metrics
import (
"context"
"fmt"
"net"
"time"
"github.com/lucas-clemente/quic-go/internal/utils"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/logging"
"go.opencensus.io/stats"
"go.opencensus.io/stats/view"
"go.opencensus.io/tag"
)
// Measures
var (
connections = stats.Int64("quic-go/connections", "number of QUIC connections", stats.UnitDimensionless)
lostPackets = stats.Int64("quic-go/lost-packets", "number of packets declared lost", stats.UnitDimensionless)
sentPackets = stats.Int64("quic-go/sent-packets", "number of packets sent", stats.UnitDimensionless)
ptos = stats.Int64("quic-go/ptos", "number of times the PTO timer fired", stats.UnitDimensionless)
closes = stats.Int64("quic-go/close", "number of connections closed", stats.UnitDimensionless)
)
// Tags
var (
keyPerspective, _ = tag.NewKey("perspective")
keyIPVersion, _ = tag.NewKey("ip_version")
keyEncryptionLevel, _ = tag.NewKey("encryption_level")
keyPacketLossReason, _ = tag.NewKey("packet_loss_reason")
keyPacketType, _ = tag.NewKey("packet_type")
keyCloseReason, _ = tag.NewKey("close_reason")
keyCloseRemote, _ = tag.NewKey("close_remote")
keyErrorCode, _ = tag.NewKey("error_code")
keyHandshakePhase, _ = tag.NewKey("handshake_phase")
)
// Views
var (
ConnectionsView = &view.View{
Measure: connections,
TagKeys: []tag.Key{keyPerspective, keyIPVersion},
Aggregation: view.Count(),
}
LostPacketsView = &view.View{
Measure: lostPackets,
TagKeys: []tag.Key{keyEncryptionLevel, keyPacketLossReason},
Aggregation: view.Count(),
}
SentPacketsView = &view.View{
Measure: sentPackets,
TagKeys: []tag.Key{keyPacketType},
Aggregation: view.Count(),
}
PTOView = &view.View{
Measure: ptos,
TagKeys: []tag.Key{keyHandshakePhase},
Aggregation: view.Count(),
}
CloseView = &view.View{
Measure: closes,
TagKeys: []tag.Key{keyCloseReason, keyErrorCode},
Aggregation: view.Count(),
}
)
// DefaultViews collects all OpenCensus views for metric gathering purposes
var DefaultViews = []*view.View{
ConnectionsView,
LostPacketsView,
SentPacketsView,
CloseView,
}
type tracer struct{}
var _ logging.Tracer = &tracer{}
// NewTracer creates a new metrics tracer.
func NewTracer() logging.Tracer { return &tracer{} }
func (t *tracer) TracerForConnection(p logging.Perspective, _ logging.ConnectionID) logging.ConnectionTracer {
return newConnTracer(t, p)
}
func (t *tracer) SentPacket(_ net.Addr, hdr *logging.Header, _ protocol.ByteCount, _ []logging.Frame) {
stats.RecordWithTags(
context.Background(),
[]tag.Mutator{
tag.Upsert(keyPacketType, packetType(logging.PacketTypeFromHeader(hdr)).String()),
},
sentPackets.M(1),
)
}
func (t *tracer) DroppedPacket(net.Addr, logging.PacketType, logging.ByteCount, logging.PacketDropReason) {
}
type connTracer struct {
perspective logging.Perspective
tracer logging.Tracer
handshakeComplete bool
}
func newConnTracer(tracer logging.Tracer, perspective logging.Perspective) logging.ConnectionTracer {
return &connTracer{
perspective: perspective,
tracer: tracer,
}
}
var _ logging.ConnectionTracer = &connTracer{}
func (t *connTracer) StartedConnection(local, _ net.Addr, _ logging.VersionNumber, _, _ logging.ConnectionID) {
perspectiveTag := tag.Upsert(keyPerspective, perspective(t.perspective).String())
var ipVersionTag tag.Mutator
if udpAddr, ok := local.(*net.UDPAddr); ok {
if utils.IsIPv4(udpAddr.IP) {
ipVersionTag = tag.Upsert(keyIPVersion, "IPv4")
} else {
ipVersionTag = tag.Upsert(keyIPVersion, "IPv6")
}
} else {
ipVersionTag = tag.Upsert(keyIPVersion, "unknown")
}
stats.RecordWithTags(
context.Background(),
[]tag.Mutator{perspectiveTag, ipVersionTag},
connections.M(1),
)
}
func (t *connTracer) ClosedConnection(r logging.CloseReason) {
var tags []tag.Mutator
if timeout, ok := r.Timeout(); ok {
tags = []tag.Mutator{
tag.Upsert(keyCloseReason, timeoutReason(timeout).String()),
tag.Upsert(keyCloseRemote, "false"),
}
} else if _, ok := r.StatelessReset(); ok {
tags = []tag.Mutator{
tag.Upsert(keyCloseReason, "stateless_reset"),
tag.Upsert(keyCloseRemote, "true"),
}
} else if errorCode, remote, ok := r.ApplicationError(); ok {
tags = []tag.Mutator{
tag.Upsert(keyCloseReason, "application_error"),
tag.Upsert(keyErrorCode, errorCode.String()),
tag.Upsert(keyCloseRemote, fmt.Sprintf("%t", remote)),
}
} else if errorCode, remote, ok := r.TransportError(); ok {
tags = []tag.Mutator{
tag.Upsert(keyCloseReason, "transport_error"),
tag.Upsert(keyErrorCode, errorCode.String()),
tag.Upsert(keyCloseRemote, fmt.Sprintf("%t", remote)),
}
}
stats.RecordWithTags(context.Background(), tags, closes.M(1))
}
func (t *connTracer) SentTransportParameters(*logging.TransportParameters) {}
func (t *connTracer) ReceivedTransportParameters(*logging.TransportParameters) {}
func (t *connTracer) SentPacket(hdr *logging.ExtendedHeader, _ logging.ByteCount, _ *logging.AckFrame, _ []logging.Frame) {
typ := logging.PacketTypeFromHeader(&hdr.Header)
if typ == logging.PacketType1RTT {
t.handshakeComplete = true
}
stats.RecordWithTags(
context.Background(),
[]tag.Mutator{
tag.Upsert(keyPacketType, packetType(typ).String()),
},
sentPackets.M(1),
)
}
func (t *connTracer) ReceivedVersionNegotiationPacket(*logging.Header, []logging.VersionNumber) {}
func (t *connTracer) ReceivedRetry(*logging.Header) {}
func (t *connTracer) ReceivedPacket(*logging.ExtendedHeader, logging.ByteCount, []logging.Frame) {
}
func (t *connTracer) BufferedPacket(logging.PacketType) {}
func (t *connTracer) DroppedPacket(logging.PacketType, logging.ByteCount, logging.PacketDropReason) {}
func (t *connTracer) UpdatedCongestionState(logging.CongestionState) {}
func (t *connTracer) UpdatedMetrics(*logging.RTTStats, logging.ByteCount, logging.ByteCount, int) {}
func (t *connTracer) LostPacket(encLevel logging.EncryptionLevel, _ logging.PacketNumber, reason logging.PacketLossReason) {
stats.RecordWithTags(
context.Background(),
[]tag.Mutator{
tag.Upsert(keyEncryptionLevel, encryptionLevel(encLevel).String()),
tag.Upsert(keyPacketLossReason, packetLossReason(reason).String()),
},
lostPackets.M(1),
)
}
func (t *connTracer) UpdatedPTOCount(value uint32) {
if value == 0 {
return
}
phase := "during_handshake"
if t.handshakeComplete {
phase = "after_handshake"
}
stats.RecordWithTags(
context.Background(),
[]tag.Mutator{tag.Upsert(keyHandshakePhase, phase)},
ptos.M(1),
)
}
func (t *connTracer) UpdatedKeyFromTLS(logging.EncryptionLevel, logging.Perspective) {}
func (t *connTracer) UpdatedKey(logging.KeyPhase, bool) {}
func (t *connTracer) DroppedEncryptionLevel(logging.EncryptionLevel) {}
func (t *connTracer) DroppedKey(logging.KeyPhase) {}
func (t *connTracer) SetLossTimer(logging.TimerType, logging.EncryptionLevel, time.Time) {}
func (t *connTracer) LossTimerExpired(logging.TimerType, logging.EncryptionLevel) {}
func (t *connTracer) LossTimerCanceled() {}
func (t *connTracer) Close() {}