programs for edns, svcb, https support measurement

method/edns.go

@@ -0,0 +1,76 @@
+package method
+
+import (
+	"edns_svcb/utils"
+	"fmt"
+	"log"
+	"sync"
+
+	"github.com/miekg/dns"
+)
+
+type TestResult struct {
+	Alive   bool
+	Support bool
+	Err     error
+}
+
+func EDNSSupportMeasurement(ip_pool chan string, result_pool chan TestResult, routine_num int, wg *sync.WaitGroup, logger *log.Logger) {
+	for i := 0; i < routine_num; i++ {
+		wg.Add(1)
+		go EDNSSupportTestRoutine(ip_pool, result_pool, wg, logger)
+	}
+}
+
+func EDNSSupportTestRoutine(ip_pool chan string, result_pool chan TestResult, wg *sync.WaitGroup, logger *log.Logger) {
+	for {
+		if ip, ok := <-ip_pool; ok {
+			addr := ip + ":53"
+			res := EDNSSupportTest(addr)
+			result_pool <- res
+			if res.Err != nil {
+				logger.Printf("%v : failed ( %v )", ip, res.Err)
+			} else {
+				logger.Printf("%v : alive %v support %v", ip, res.Alive, res.Support)
+			}
+		} else {
+			break
+		}
+	}
+	wg.Done()
+}
+
+func EDNSSupportTest(addr string) TestResult {
+	_, err := utils.DNSQuery(addr, utils.DNSOptions{Domain: "www.example.net", RD: true})
+	if err != nil {
+		return TestResult{Err: err}
+	}
+	res, err := utils.DNSQuery(addr, utils.DNSOptions{Domain: "www.example.net", EDNS: true, RD: true})
+	if err == nil {
+		if len(res.Extra) == 1 {
+			if _, ok := res.Extra[0].(*dns.OPT); ok {
+				return TestResult{Alive: true, Support: true}
+			}
+		}
+	}
+	return TestResult{Alive: true}
+}
+
+func EDNSSupportResultProcess(result_pool chan TestResult, wg *sync.WaitGroup) {
+	alive_cnt := 0
+	valid_cnt := 0
+	for {
+		if res, ok := <-result_pool; ok {
+			if res.Alive {
+				alive_cnt++
+			}
+			if res.Support {
+				valid_cnt++
+			}
+		} else {
+			break
+		}
+	}
+	fmt.Printf("EDNS support Test: alive %v support %v\n", alive_cnt, valid_cnt)
+	wg.Done()
+}