mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-11 02:34:43 +00:00
7c1d6e35a5
Updates #11058 Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
236 lines
6.7 KiB
Go
236 lines
6.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package connstats
|
|
|
|
import (
|
|
"context"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"math/rand"
|
|
"net/netip"
|
|
"runtime"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
qt "github.com/frankban/quicktest"
|
|
"tailscale.com/cmd/testwrapper/flakytest"
|
|
"tailscale.com/types/ipproto"
|
|
"tailscale.com/types/netlogtype"
|
|
)
|
|
|
|
func testPacketV4(proto ipproto.Proto, srcAddr, dstAddr [4]byte, srcPort, dstPort, size uint16) (out []byte) {
|
|
var ipHdr [20]byte
|
|
ipHdr[0] = 4<<4 | 5
|
|
binary.BigEndian.PutUint16(ipHdr[2:], size)
|
|
ipHdr[9] = byte(proto)
|
|
*(*[4]byte)(ipHdr[12:]) = srcAddr
|
|
*(*[4]byte)(ipHdr[16:]) = dstAddr
|
|
out = append(out, ipHdr[:]...)
|
|
switch proto {
|
|
case ipproto.TCP:
|
|
var tcpHdr [20]byte
|
|
binary.BigEndian.PutUint16(tcpHdr[0:], srcPort)
|
|
binary.BigEndian.PutUint16(tcpHdr[2:], dstPort)
|
|
out = append(out, tcpHdr[:]...)
|
|
case ipproto.UDP:
|
|
var udpHdr [8]byte
|
|
binary.BigEndian.PutUint16(udpHdr[0:], srcPort)
|
|
binary.BigEndian.PutUint16(udpHdr[2:], dstPort)
|
|
out = append(out, udpHdr[:]...)
|
|
default:
|
|
panic(fmt.Sprintf("unknown proto: %d", proto))
|
|
}
|
|
return append(out, make([]byte, int(size)-len(out))...)
|
|
}
|
|
|
|
// TestInterval ensures that we receive at least one call to `dump` using only
|
|
// maxPeriod.
|
|
func TestInterval(t *testing.T) {
|
|
c := qt.New(t)
|
|
|
|
const maxPeriod = 10 * time.Millisecond
|
|
const maxConns = 2048
|
|
|
|
gotDump := make(chan struct{}, 1)
|
|
stats := NewStatistics(maxPeriod, maxConns, func(_, _ time.Time, _, _ map[netlogtype.Connection]netlogtype.Counts) {
|
|
select {
|
|
case gotDump <- struct{}{}:
|
|
default:
|
|
}
|
|
})
|
|
defer stats.Shutdown(context.Background())
|
|
|
|
srcAddr := netip.AddrFrom4([4]byte{192, 168, 0, byte(rand.Intn(16))})
|
|
dstAddr := netip.AddrFrom4([4]byte{192, 168, 0, byte(rand.Intn(16))})
|
|
srcPort := uint16(rand.Intn(16))
|
|
dstPort := uint16(rand.Intn(16))
|
|
size := uint16(64 + rand.Intn(1024))
|
|
p := testPacketV4(ipproto.TCP, srcAddr.As4(), dstAddr.As4(), srcPort, dstPort, size)
|
|
stats.UpdateRxVirtual(p)
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
select {
|
|
case <-ctx.Done():
|
|
c.Fatal("didn't receive dump within context deadline")
|
|
case <-gotDump:
|
|
}
|
|
}
|
|
|
|
func TestConcurrent(t *testing.T) {
|
|
flakytest.Mark(t, "https://github.com/tailscale/tailscale/issues/7030")
|
|
c := qt.New(t)
|
|
|
|
const maxPeriod = 10 * time.Millisecond
|
|
const maxConns = 10
|
|
virtualAggregate := make(map[netlogtype.Connection]netlogtype.Counts)
|
|
stats := NewStatistics(maxPeriod, maxConns, func(start, end time.Time, virtual, physical map[netlogtype.Connection]netlogtype.Counts) {
|
|
c.Assert(start.IsZero(), qt.IsFalse)
|
|
c.Assert(end.IsZero(), qt.IsFalse)
|
|
c.Assert(end.Before(start), qt.IsFalse)
|
|
c.Assert(len(virtual) > 0 && len(virtual) <= maxConns, qt.IsTrue)
|
|
c.Assert(len(physical) == 0, qt.IsTrue)
|
|
for conn, cnts := range virtual {
|
|
virtualAggregate[conn] = virtualAggregate[conn].Add(cnts)
|
|
}
|
|
})
|
|
defer stats.Shutdown(context.Background())
|
|
var wants []map[netlogtype.Connection]netlogtype.Counts
|
|
gots := make([]map[netlogtype.Connection]netlogtype.Counts, runtime.NumCPU())
|
|
var group sync.WaitGroup
|
|
for i := range gots {
|
|
group.Add(1)
|
|
go func(i int) {
|
|
defer group.Done()
|
|
gots[i] = make(map[netlogtype.Connection]netlogtype.Counts)
|
|
rn := rand.New(rand.NewSource(time.Now().UnixNano()))
|
|
var p []byte
|
|
var t netlogtype.Connection
|
|
for j := 0; j < 1000; j++ {
|
|
delay := rn.Intn(10000)
|
|
if p == nil || rn.Intn(64) == 0 {
|
|
proto := ipproto.TCP
|
|
if rn.Intn(2) == 0 {
|
|
proto = ipproto.UDP
|
|
}
|
|
srcAddr := netip.AddrFrom4([4]byte{192, 168, 0, byte(rand.Intn(16))})
|
|
dstAddr := netip.AddrFrom4([4]byte{192, 168, 0, byte(rand.Intn(16))})
|
|
srcPort := uint16(rand.Intn(16))
|
|
dstPort := uint16(rand.Intn(16))
|
|
size := uint16(64 + rand.Intn(1024))
|
|
p = testPacketV4(proto, srcAddr.As4(), dstAddr.As4(), srcPort, dstPort, size)
|
|
t = netlogtype.Connection{Proto: proto, Src: netip.AddrPortFrom(srcAddr, srcPort), Dst: netip.AddrPortFrom(dstAddr, dstPort)}
|
|
}
|
|
t2 := t
|
|
receive := rn.Intn(2) == 0
|
|
if receive {
|
|
t2.Src, t2.Dst = t2.Dst, t2.Src
|
|
}
|
|
|
|
cnts := gots[i][t2]
|
|
if receive {
|
|
stats.UpdateRxVirtual(p)
|
|
cnts.RxPackets++
|
|
cnts.RxBytes += uint64(len(p))
|
|
} else {
|
|
cnts.TxPackets++
|
|
cnts.TxBytes += uint64(len(p))
|
|
stats.UpdateTxVirtual(p)
|
|
}
|
|
gots[i][t2] = cnts
|
|
time.Sleep(time.Duration(rn.Intn(1 + delay)))
|
|
}
|
|
}(i)
|
|
}
|
|
group.Wait()
|
|
c.Assert(stats.Shutdown(context.Background()), qt.IsNil)
|
|
wants = append(wants, virtualAggregate)
|
|
|
|
got := make(map[netlogtype.Connection]netlogtype.Counts)
|
|
want := make(map[netlogtype.Connection]netlogtype.Counts)
|
|
mergeMaps(got, gots...)
|
|
mergeMaps(want, wants...)
|
|
c.Assert(got, qt.DeepEquals, want)
|
|
}
|
|
|
|
func mergeMaps(dst map[netlogtype.Connection]netlogtype.Counts, srcs ...map[netlogtype.Connection]netlogtype.Counts) {
|
|
for _, src := range srcs {
|
|
for conn, cnts := range src {
|
|
dst[conn] = dst[conn].Add(cnts)
|
|
}
|
|
}
|
|
}
|
|
|
|
func Benchmark(b *testing.B) {
|
|
// TODO: Test IPv6 packets?
|
|
b.Run("SingleRoutine/SameConn", func(b *testing.B) {
|
|
p := testPacketV4(ipproto.UDP, [4]byte{192, 168, 0, 1}, [4]byte{192, 168, 0, 2}, 123, 456, 789)
|
|
b.ResetTimer()
|
|
b.ReportAllocs()
|
|
for range b.N {
|
|
s := NewStatistics(0, 0, nil)
|
|
for j := 0; j < 1e3; j++ {
|
|
s.UpdateTxVirtual(p)
|
|
}
|
|
}
|
|
})
|
|
b.Run("SingleRoutine/UniqueConns", func(b *testing.B) {
|
|
p := testPacketV4(ipproto.UDP, [4]byte{}, [4]byte{}, 0, 0, 789)
|
|
b.ResetTimer()
|
|
b.ReportAllocs()
|
|
for range b.N {
|
|
s := NewStatistics(0, 0, nil)
|
|
for j := 0; j < 1e3; j++ {
|
|
binary.BigEndian.PutUint32(p[20:], uint32(j)) // unique port combination
|
|
s.UpdateTxVirtual(p)
|
|
}
|
|
}
|
|
})
|
|
b.Run("MultiRoutine/SameConn", func(b *testing.B) {
|
|
p := testPacketV4(ipproto.UDP, [4]byte{192, 168, 0, 1}, [4]byte{192, 168, 0, 2}, 123, 456, 789)
|
|
b.ResetTimer()
|
|
b.ReportAllocs()
|
|
for range b.N {
|
|
s := NewStatistics(0, 0, nil)
|
|
var group sync.WaitGroup
|
|
for j := 0; j < runtime.NumCPU(); j++ {
|
|
group.Add(1)
|
|
go func() {
|
|
defer group.Done()
|
|
for k := 0; k < 1e3; k++ {
|
|
s.UpdateTxVirtual(p)
|
|
}
|
|
}()
|
|
}
|
|
group.Wait()
|
|
}
|
|
})
|
|
b.Run("MultiRoutine/UniqueConns", func(b *testing.B) {
|
|
ps := make([][]byte, runtime.NumCPU())
|
|
for i := range ps {
|
|
ps[i] = testPacketV4(ipproto.UDP, [4]byte{192, 168, 0, 1}, [4]byte{192, 168, 0, 2}, 0, 0, 789)
|
|
}
|
|
b.ResetTimer()
|
|
b.ReportAllocs()
|
|
for range b.N {
|
|
s := NewStatistics(0, 0, nil)
|
|
var group sync.WaitGroup
|
|
for j := 0; j < runtime.NumCPU(); j++ {
|
|
group.Add(1)
|
|
go func(j int) {
|
|
defer group.Done()
|
|
p := ps[j]
|
|
j *= 1e3
|
|
for k := 0; k < 1e3; k++ {
|
|
binary.BigEndian.PutUint32(p[20:], uint32(j+k)) // unique port combination
|
|
s.UpdateTxVirtual(p)
|
|
}
|
|
}(j)
|
|
}
|
|
group.Wait()
|
|
}
|
|
})
|
|
}
|