exec: add ping measure tool

exec/misc/ping-measure/main.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"context"
+	"crypto/rand"
+	"fmt"
+	"log"
+	"network-measure/tool"
+	"os"
+
+	"golang.org/x/sync/semaphore"
+)
+
+var dataStorage [56]byte
+
+type measureResult struct {
+	addr     string
+	received int
+	latency  float64
+	score    float64
+}
+
+const concurrency = 16
+
+func main() {
+	_, _ = rand.Read(dataStorage[:])
+	sema := semaphore.NewWeighted(concurrency)
+	reporter := make(chan measureResult)
+	f, err := os.OpenFile("result.txt", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0755)
+	if err != nil {
+		log.Fatalf("can't open file: %s\n", err)
+	}
+
+	measure := func(addr string) {
+		defer sema.Release(1)
+
+		tcp, err := tool.TCPing(&tool.TCPingQ{
+			Address:  addr,
+			Family:   0,
+			Port:     443,
+			Wait:     1000,
+			Interval: 1000,
+			Times:    4,
+		})
+
+		if err != nil {
+			log.Printf("failed tcping %s: %s\n", addr, err)
+		}
+
+		result := measureResult{
+			addr: addr,
+		}
+		for _, record := range tcp.Data {
+			if record.Success {
+				result.received++
+				result.latency += record.Latency
+				result.score += 1000 - record.Latency
+			}
+		}
+
+		if result.received == 0 {
+			result.latency = 1000
+		} else {
+			result.latency /= float64(result.received)
+		}
+
+		result.score /= 4000 / 100 // rescale from 4000 to 100
+		reporter <- result
+	}
+
+	go func() {
+		for result := range reporter {
+			log.Printf("%s score %.2f, %.2fms of %d success\n", result.addr, result.score, result.latency, result.received)
+			_, err := fmt.Fprintf(f, "%s %f %f %d\n", result.addr, result.score, result.latency, result.received)
+			if err != nil {
+				log.Fatalf("Failed write record: %s\n", err)
+			}
+		}
+
+		_ = f.Close()
+	}()
+
+	for i := 0; i < 0xff; i++ {
+		addr := fmt.Sprintf("0.0.0.%d", i)
+		if i%0x100 == 0 {
+			log.Printf("Now at %s\n", addr)
+		}
+		_ = sema.Acquire(context.Background(), 1)
+		go measure(addr)
+	}
+
+	_ = sema.Acquire(context.Background(), concurrency)
+	close(reporter)
+}