fix: 多次路由取平均，输出方式提取到最外层调用

README.md

@@ -16,6 +16,7 @@
 - [x] 支持对```CMIN2```和```CMI```线路的判断
 - [x] 支持对整个回程路由进行线路分析，一个目标IP可能会分析出多种线路
 - [x] 支持对主流接入点的线路检测，方便分析国际互联能力
+- [x] 多次并发路由检测以分析平均多次路由，避免单次路由因网络波动未能准确检测
 - [x] 增加对全平台的编译支持，原版[backtrace](https://github.com/zhanghanyun/backtrace)仅支持linux平台的amd64和arm64架构
 - [x] 兼容额外的ICMP地址获取，若当前目标IP无法查询路由尝试额外的IP地址
 

bk/backtrace.go

@@ -1,13 +1,13 @@
 package backtrace
 
 import (
-	"fmt"
+	"strings"
 	"time"
 
 	"github.com/oneclickvirt/backtrace/model"
 )
 
-func BackTrace(enableIpv6 bool) {
+func BackTrace(enableIpv6 bool) string {
 	if model.CachedIcmpData == "" || model.ParsedIcmpTargets == nil || time.Since(model.CachedIcmpDataFetchTime) > time.Hour {
 		model.CachedIcmpData = getData(model.IcmpTargets)
 		model.CachedIcmpDataFetchTime = time.Now()
@@ -15,6 +15,7 @@ func BackTrace(enableIpv6 bool) {
 			model.ParsedIcmpTargets = parseIcmpTargets(model.CachedIcmpData)
 		}
 	}
+	var builder strings.Builder
 	if enableIpv6 {
 		ipv4Count := len(model.Ipv4s)
 		ipv6Count := len(model.Ipv6s)
@@ -39,14 +40,18 @@ func BackTrace(enableIpv6 bool) {
 				break loopIPv4v6
 			}
 		}
+		// 收集 IPv4 结果
 		for i := 0; i < ipv4Count; i++ {
 			if s[i] != "" {
-				fmt.Println(s[i])
+				builder.WriteString(s[i])
+				builder.WriteString("\n")
 			}
 		}
+		// 收集 IPv6 结果
 		for i := ipv4Count; i < totalCount; i++ {
 			if s[i] != "" {
-				fmt.Println(s[i])
+				builder.WriteString(s[i])
+				builder.WriteString("\n")
 			}
 		}
 	} else {
@@ -68,10 +73,15 @@ func BackTrace(enableIpv6 bool) {
 				break loopIPv4
 			}
 		}
+		// 收集结果
 		for _, r := range s {
 			if r != "" {
-				fmt.Println(r)
+				builder.WriteString(r)
+				builder.WriteString("\n")
 			}
 		}
 	}
+	// 返回完整结果，去掉末尾的换行符
+	result := builder.String()
+	return strings.TrimSuffix(result, "\n")
 }

bk/trace_common.go

@@ -194,14 +194,15 @@ func (t *Tracer) serveData(from net.IP, b []byte) error {
 			Logger.Info(fmt.Sprintf("收到IPv6 ICMP消息: 类型=%v, 代码=%v", msg.Type, msg.Code))
 		}
 		// 处理不同类型的ICMP消息
-		if msg.Type == ipv6.ICMPTypeEchoReply {
+		switch msg.Type {
+		case ipv6.ICMPTypeEchoReply:
 			if echo, ok := msg.Body.(*icmp.Echo); ok {
 				if model.EnableLoger {
 					Logger.Info(fmt.Sprintf("处理IPv6回显应答: ID=%d, Seq=%d", echo.ID, echo.Seq))
 				}
 				return t.serveReply(from, &packet{from, uint16(echo.ID), 1, time.Now()})
 			}
-		} else if msg.Type == ipv6.ICMPTypeTimeExceeded {
+		case ipv6.ICMPTypeTimeExceeded:
 			b = getReplyData(msg)
 			if len(b) < ipv6.HeaderLen {
 				if model.EnableLoger {

bk/trace_ipv4.go

@@ -62,46 +62,56 @@ func trace(ch chan Result, i int) {
 		defer Logger.Sync()
 		Logger.Info(fmt.Sprintf("开始追踪 %s (%s)", model.Ipv4Names[i], model.Ipv4s[i]))
 	}
+	var allHops [][]*Hop
+	var successfulTraces int
+	// 尝试3次trace
+	for attempt := 1; attempt <= 3; attempt++ {
+		if model.EnableLoger {
+			Logger.Info(fmt.Sprintf("第%d次尝试追踪 %s (%s)", attempt, model.Ipv4Names[i], model.Ipv4s[i]))
+		}
 		// 先尝试原始IP地址
 		hops, err := Trace(net.ParseIP(model.Ipv4s[i]))
 		if err != nil {
-		s := fmt.Sprintf("%v %-15s %v", model.Ipv4Names[i], model.Ipv4s[i], Red("检测不到回程路由节点的IP地址"))
 			if model.EnableLoger {
-			Logger.Error(fmt.Sprintf("追踪 %s (%s) 失败: %v", model.Ipv4Names[i], model.Ipv4s[i], err))
+				Logger.Warn(fmt.Sprintf("第%d次追踪 %s (%s) 失败: %v", attempt, model.Ipv4Names[i], model.Ipv4s[i], err))
 			}
-		ch <- Result{i, s}
-		return
-	}
-	asns := extractIpv4ASNsFromHops(hops, model.EnableLoger)
-	// 如果没有找到ASN，尝试备选IP
-	if len(asns) == 0 {
-		// 尝试从IcmpTargets获取备选IP
+			// 如果原始IP失败，尝试备选IP
 			if tryAltIPs := tryAlternativeIPs(model.Ipv4Names[i], "v4"); len(tryAltIPs) > 0 {
 				for _, altIP := range tryAltIPs {
 					if model.EnableLoger {
-					Logger.Info(fmt.Sprintf("尝试备选IP %s 追踪 %s", altIP, model.Ipv4Names[i]))
+						Logger.Info(fmt.Sprintf("第%d次尝试备选IP %s 追踪 %s", attempt, altIP, model.Ipv4Names[i]))
 					}
 					hops, err = Trace(net.ParseIP(altIP))
 					if err == nil && len(hops) > 0 {
-					newAsns := extractIpv4ASNsFromHops(hops, model.EnableLoger)
-					asns = append(asns, newAsns...)
-					if len(newAsns) > 0 {
 						break // 成功找到可用IP
 					}
 				}
 			}
 		}
+		if err == nil && len(hops) > 0 {
+			allHops = append(allHops, hops)
+			successfulTraces++
+			if model.EnableLoger {
+				Logger.Info(fmt.Sprintf("第%d次追踪 %s (%s) 成功，获得%d个hop", attempt, model.Ipv4Names[i], model.Ipv4s[i], len(hops)))
 			}
-	asns = removeDuplicates(asns)
-	// // 记录每个hop的信息
-	// if model.EnableLoger {
-	// 	for hopNum, hop := range hops {
-	// 		for nodeNum, node := range hop.Nodes {
-	// 			Logger.Info(fmt.Sprintf("追踪 %s (%s) - Hop %d, Node %d: %s (RTT: %v)",
-	// 				model.Ipv4Names[i], model.Ipv4s[i], hopNum+1, nodeNum+1, node.IP.String(), node.RTT))
-	// 		}
-	// 	}
-	// }
+		}
+	}
+	// 如果3次都失败
+	if successfulTraces == 0 {
+		s := fmt.Sprintf("%v %-15s %v", model.Ipv4Names[i], model.Ipv4s[i], Red("检测不到回程路由节点的IP地址"))
+		if model.EnableLoger {
+			Logger.Error(fmt.Sprintf("%s (%s) 3次尝试都失败，检测不到回程路由节点的IP地址", model.Ipv4Names[i], model.Ipv4s[i]))
+		}
+		ch <- Result{i, s}
+		return
+	}
+	// 合并hops结果
+	mergedHops := mergeHops(allHops)
+	if model.EnableLoger {
+		Logger.Info(fmt.Sprintf("%s (%s) 完成%d次成功追踪，合并后获得%d个hop", model.Ipv4Names[i], model.Ipv4s[i], successfulTraces, len(mergedHops)))
+	}
+	// 从合并后的hops提取ASN
+	asns := extractIpv4ASNsFromHops(mergedHops, model.EnableLoger)
 	// 处理不同线路
 	if len(asns) > 0 {
 		var tempText string
@@ -167,18 +177,16 @@ func trace(ch chan Result, i int) {
 		}
 		if tempText == (fmt.Sprintf("%v ", model.Ipv4Names[i]) + fmt.Sprintf("%-15s ", model.Ipv4s[i])) {
 			tempText += fmt.Sprintf("%v", Red("检测不到已知线路的ASN"))
-
 			if model.EnableLoger {
 				Logger.Warn(fmt.Sprintf("%s (%s) 检测不到已知线路的ASN", model.Ipv4Names[i], model.Ipv4s[i]))
 			}
 		}
 		if model.EnableLoger {
-			Logger.Info(fmt.Sprintf("%s (%s) 追踪完成，结果: %s", model.Ipv4Names[i], model.Ipv4s[i], tempText))
+			Logger.Info(fmt.Sprintf("%s (%s) 追踪完成，最终结果: %s", model.Ipv4Names[i], model.Ipv4s[i], tempText))
 		}
 		ch <- Result{i, tempText}
 	} else {
 		s := fmt.Sprintf("%v %-15s %v", model.Ipv4Names[i], model.Ipv4s[i], Red("检测不到回程路由节点的IPV4地址"))
-
 		if model.EnableLoger {
 			Logger.Warn(fmt.Sprintf("%s (%s) 检测不到回程路由节点的IPV4地址", model.Ipv4Names[i], model.Ipv4s[i]))
 		}

bk/trace_ipv6.go

@@ -11,7 +11,7 @@ import (
 	"golang.org/x/net/ipv6"
 )
 
-func newPacketV6(id uint16, dst net.IP, ttl int) []byte {
+func newPacketV6(id uint16, _ net.IP, _ int) []byte {
 	// 使用ipv6包的Echo请求
 	msg := icmp.Message{
 		Type: ipv6.ICMPTypeEchoRequest,
@@ -77,46 +77,56 @@ func traceIPv6(ch chan Result, i int, offset int) {
 		defer Logger.Sync()
 		Logger.Info(fmt.Sprintf("开始追踪 %s (%s)", model.Ipv6Names[i], model.Ipv6s[i]))
 	}
+	var allHops [][]*Hop
+	var successfulTraces int
+	// 尝试3次trace
+	for attempt := 1; attempt <= 3; attempt++ {
+		if model.EnableLoger {
+			Logger.Info(fmt.Sprintf("第%d次尝试追踪 %s (%s)", attempt, model.Ipv6Names[i], model.Ipv6s[i]))
+		}
 		// 先尝试原始IP地址
 		hops, err := Trace(net.ParseIP(model.Ipv6s[i]))
 		if err != nil {
-		s := fmt.Sprintf("%v %-24s %v", model.Ipv6Names[i], model.Ipv6s[i], Red("检测不到回程路由节点的IP地址"))
 			if model.EnableLoger {
-			Logger.Warn(fmt.Sprintf("%s (%s) 检测不到回程路由节点的IP地址", model.Ipv6Names[i], model.Ipv6s[i]))
+				Logger.Warn(fmt.Sprintf("第%d次追踪 %s (%s) 失败: %v", attempt, model.Ipv6Names[i], model.Ipv6s[i], err))
 			}
-		ch <- Result{i + offset, s}
-		return
-	}
-	asns := extractIpv6ASNsFromHops(hops, model.EnableLoger)
-	// 如果没有找到ASN，尝试备选IP
-	if len(asns) == 0 {
-		// 尝试从IcmpTargets获取备选IP
+			// 如果原始IP失败，尝试备选IP
 			if tryAltIPs := tryAlternativeIPs(model.Ipv6Names[i], "v6"); len(tryAltIPs) > 0 {
 				for _, altIP := range tryAltIPs {
 					if model.EnableLoger {
-					Logger.Info(fmt.Sprintf("尝试备选IP %s 追踪 %s", altIP, model.Ipv6Names[i]))
+						Logger.Info(fmt.Sprintf("第%d次尝试备选IP %s 追踪 %s", attempt, altIP, model.Ipv6Names[i]))
 					}
 					hops, err = Trace(net.ParseIP(altIP))
 					if err == nil && len(hops) > 0 {
-					newAsns := extractIpv6ASNsFromHops(hops, model.EnableLoger)
-					asns = append(asns, newAsns...)
-					if len(newAsns) > 0 {
 						break // 成功找到可用IP
 					}
 				}
 			}
 		}
+		if err == nil && len(hops) > 0 {
+			allHops = append(allHops, hops)
+			successfulTraces++
+			if model.EnableLoger {
+				Logger.Info(fmt.Sprintf("第%d次追踪 %s (%s) 成功，获得%d个hop", attempt, model.Ipv6Names[i], model.Ipv6s[i], len(hops)))
 			}
-	asns = removeDuplicates(asns)
-	// // 记录每个hop的信息
-	// if model.EnableLoger {
-	// 	for hopNum, hop := range hops {
-	// 		for nodeNum, node := range hop.Nodes {
-	// 			Logger.Info(fmt.Sprintf("追踪 %s (%s) - Hop %d, Node %d: %s (RTT: %v)",
-	// 				model.Ipv6Names[i], model.Ipv6s[i], hopNum+1, nodeNum+1, node.IP.String(), node.RTT))
-	// 		}
-	// 	}
-	// }
+		}
+	}
+	// 如果3次都失败
+	if successfulTraces == 0 {
+		s := fmt.Sprintf("%v %-24s %v", model.Ipv6Names[i], model.Ipv6s[i], Red("检测不到回程路由节点的IP地址"))
+		if model.EnableLoger {
+			Logger.Warn(fmt.Sprintf("%s (%s) 3次尝试都失败，检测不到回程路由节点的IP地址", model.Ipv6Names[i], model.Ipv6s[i]))
+		}
+		ch <- Result{i + offset, s}
+		return
+	}
+	// 合并hops结果
+	mergedHops := mergeHops(allHops)
+	if model.EnableLoger {
+		Logger.Info(fmt.Sprintf("%s (%s) 完成%d次成功追踪，合并后获得%d个hop", model.Ipv6Names[i], model.Ipv6s[i], successfulTraces, len(mergedHops)))
+	}
+	// 从合并后的hops提取ASN
+	asns := extractIpv6ASNsFromHops(mergedHops, model.EnableLoger)
 	// 处理不同线路
 	if len(asns) > 0 {
 		var tempText string
@@ -187,7 +197,7 @@ func traceIPv6(ch chan Result, i int, offset int) {
 			}
 		}
 		if model.EnableLoger {
-			Logger.Info(fmt.Sprintf("%s (%s) 追踪完成，结果: %s", model.Ipv6Names[i], model.Ipv6s[i], tempText))
+			Logger.Info(fmt.Sprintf("%s (%s) 追踪完成，最终结果: %s", model.Ipv6Names[i], model.Ipv6s[i], tempText))
 		}
 		ch <- Result{i + offset, tempText}
 	} else {

bk/utils.go

@@ -140,3 +140,76 @@ func tryAlternativeIPs(targetName string, ipVersion string) []string {
 	}
 	return nil
 }
+
+// mergeHops 合并多个hops结果
+func mergeHops(allHops [][]*Hop) []*Hop {
+	if len(allHops) == 0 {
+		return nil
+	}
+	if len(allHops) == 1 {
+		return allHops[0]
+	}
+	// 找到最大长度
+	maxLen := 0
+	for _, hops := range allHops {
+		if len(hops) > maxLen {
+			maxLen = len(hops)
+		}
+	}
+	var mergedHops []*Hop
+	// 逐位置合并
+	for pos := 0; pos < maxLen; pos++ {
+		var availableHops []*Hop
+		// 收集当前位置所有可用的hop
+		for _, hops := range allHops {
+			if pos < len(hops) {
+				availableHops = append(availableHops, hops[pos])
+			}
+		}
+		if len(availableHops) == 0 {
+			continue
+		}
+		// 如果只有一个可用hop，直接使用
+		if len(availableHops) == 1 {
+			mergedHops = append(mergedHops, availableHops[0])
+			continue
+		}
+		// 统计相同的hop（通过比较第一个node的IP）
+		hopCount := make(map[string][]*Hop)
+		for _, hop := range availableHops {
+			var key string
+			if len(hop.Nodes) > 0 && hop.Nodes[0].IP != nil {
+				key = hop.Nodes[0].IP.String()
+			} else {
+				key = "*" // 超时或无响应
+			}
+			if _, exists := hopCount[key]; !exists {
+				hopCount[key] = make([]*Hop, 0)
+			}
+			hopCount[key] = append(hopCount[key], hop)
+		}
+		// 按多数原则选择hop
+		if len(hopCount) == 1 {
+			// 所有hop都相同，选择第一个
+			mergedHops = append(mergedHops, availableHops[0])
+		} else {
+			// 找出最多的hop类型
+			maxCount := 0
+			var majorityHops []*Hop
+			for _, hops := range hopCount {
+				if len(hops) > maxCount {
+					maxCount = len(hops)
+					majorityHops = hops
+				}
+			}
+			// 如果有多数派，使用多数派的第一个
+			if maxCount > 1 || len(hopCount) == 2 {
+				mergedHops = append(mergedHops, majorityHops[0])
+			} else {
+				// 三个都不同，按请求早晚顺序选择第一个
+				mergedHops = append(mergedHops, availableHops[0])
+			}
+		}
+	}
+	return mergedHops
+}

cmd/main.go

@@ -1,4 +1,5 @@
 package main
+
 import (
 	"encoding/json"
 	"flag"
@@ -7,12 +8,14 @@ import (
 	"os"
 	"runtime"
 	"time"
+
 	"github.com/oneclickvirt/backtrace/bgptools"
 	backtrace "github.com/oneclickvirt/backtrace/bk"
 	"github.com/oneclickvirt/backtrace/model"
 	"github.com/oneclickvirt/backtrace/utils"
 	. "github.com/oneclickvirt/defaultset"
 )
+
 type IpInfo struct {
 	Ip      string `json:"ip"`
 	City    string `json:"city"`
@@ -20,6 +23,7 @@ type IpInfo struct {
 	Country string `json:"country"`
 	Org     string `json:"org"`
 }
+
 func main() {
 	go func() {
 		http.Get("https://hits.spiritlhl.net/backtrace.svg?action=hit&title=Hits&title_bg=%23555555&count_bg=%230eecf8&edge_flat=false")
@@ -48,11 +52,11 @@ func main() {
 	if showIpInfo {
 		rsp, err := http.Get("http://ipinfo.io")
 		if err != nil {
-			fmt.Errorf("Get ip info err %v \n", err.Error())
+			fmt.Printf("get ip info err %v \n", err.Error())
 		} else {
 			err = json.NewDecoder(rsp.Body).Decode(&info)
 			if err != nil {
-				fmt.Errorf("json decode err %v \n", err.Error())
+				fmt.Printf("json decode err %v \n", err.Error())
 			} else {
 				fmt.Println(Green("国家: ") + White(info.Country) + Green(" 城市: ") + White(info.City) +
 					Green(" 服务商: ") + Blue(info.Org))
@@ -75,11 +79,14 @@ func main() {
 		}
 	}
 	if preCheck.Connected && preCheck.StackType == "DualStack" {
-		backtrace.BackTrace(ipv6)
+		result := backtrace.BackTrace(ipv6)
+		fmt.Printf("%s\n", result)
 	} else if preCheck.Connected && preCheck.StackType == "IPv4" {
-		backtrace.BackTrace(false)
+		result := backtrace.BackTrace(false)
+		fmt.Printf("%s\n", result)
 	} else if preCheck.Connected && preCheck.StackType == "IPv6" {
-		backtrace.BackTrace(true)
+		result := backtrace.BackTrace(true)
+		fmt.Printf("%s\n", result)
 	} else {
 		fmt.Println(Red("PreCheck IP Type Failed"))
 	}