1 files changed, 123 insertions, 0 deletions
diff --git a/method/combined.go b/method/combined.go
new file mode 100644
index 0000000..f264710
--- /dev/null
+++ b/method/combined.go
@@ -0,0 +1,123 @@
+package method
+
+import (
+	"edns_svcb/utils"
+	"fmt"
+	"log"
+	"sync"
+
+	"github.com/miekg/dns"
+)
+
+type CombinedResult struct {
+	Alive        bool
+	EDNSSupport  bool
+	SVCBSupport  bool
+	HTTPSSupport bool
+	Err          error
+}
+
+func CombinedMeasurement(ip_pool chan string, result_pool chan CombinedResult, routine_num int, wg *sync.WaitGroup, logger *log.Logger) {
+	for i := 0; i < routine_num; i++ {
+		wg.Add(1)
+		go CombinedTestRoutine(ip_pool, result_pool, wg, logger)
+	}
+}
+
+func CombinedTestRoutine(ip_pool chan string, result_pool chan CombinedResult, wg *sync.WaitGroup, logger *log.Logger) {
+	for {
+		if ip, ok := <-ip_pool; ok {
+			addr := ip + ":53"
+			res := CombinedTest(addr)
+			result_pool <- res
+			if res.Err != nil {
+				logger.Printf("%v : failed ( %v )", ip, res.Err)
+			} else {
+				logger.Printf("%v : alive %v edns %v svcb %v https %v", ip, res.Alive, res.EDNSSupport, res.SVCBSupport, res.HTTPSSupport)
+			}
+		} else {
+			break
+		}
+	}
+	wg.Done()
+}
+
+func CombinedTest(addr string) CombinedResult {
+	result := CombinedResult{}
+	_, err := utils.DNSQuery(addr, utils.DNSOptions{Domain: "www.example.com", RD: true})
+	if err != nil {
+		return CombinedResult{Err: err}
+	}
+	result.Alive = true
+
+	//edns support
+	res, err := utils.DNSQuery(addr, utils.DNSOptions{Domain: "www.example.com", EDNS: true, RD: true})
+	if err == nil {
+		if len(res.Extra) > 0 {
+			if _, ok := res.Extra[0].(*dns.OPT); ok {
+				result.EDNSSupport = true
+			}
+		}
+	} else {
+		result.Err = err
+		return result
+	}
+
+	// svcb support
+	res, err = utils.DNSQuery(addr, utils.DNSOptions{Domain: "_dns.resolver.arpa", Qtype: dns.TypeSVCB, RD: true})
+	if err == nil {
+		if len(res.Answer) > 0 {
+			if _, ok := res.Answer[0].(*dns.SVCB); ok {
+				result.SVCBSupport = true
+			}
+		}
+	} else {
+		result.Err = err
+		return result
+	}
+
+	// https support
+	res, err = utils.DNSQuery(addr, utils.DNSOptions{Domain: "blog.cloudflare.com", Qtype: dns.TypeHTTPS, RD: true})
+	if err == nil {
+		if len(res.Answer) > 0 {
+			if _, ok := res.Answer[0].(*dns.HTTPS); ok {
+				result.HTTPSSupport = true
+			}
+		}
+	} else {
+		result.Err = err
+		return result
+	}
+
+	return result
+}
+
+func CombinedResultProcess(result_pool chan CombinedResult, wg *sync.WaitGroup) {
+	alive_cnt := 0
+	edns_cnt := 0
+	svcb_cnt := 0
+	https_cnt := 0
+	for {
+		if res, ok := <-result_pool; ok {
+			if res.Err != nil {
+				continue
+			}
+			if res.Alive {
+				alive_cnt++
+			}
+			if res.EDNSSupport {
+				edns_cnt++
+			}
+			if res.SVCBSupport {
+				svcb_cnt++
+			}
+			if res.HTTPSSupport {
+				https_cnt++
+			}
+		} else {
+			break
+		}
+	}
+	fmt.Printf("EDNS support Test: alive %v edns %v svcb %v https %v\n", alive_cnt, edns_cnt, svcb_cnt, https_cnt)
+	wg.Done()
+}