fix: 修复IPV6包构建

bk/asn.go

@@ -14,19 +14,30 @@ type Result struct {
 }
 
 var (
-	ips = []string{
+	ipv4s = []string{
 		// "219.141.136.12", "202.106.50.1",
 		"219.141.140.10", "202.106.195.68", "221.179.155.161",
 		"202.96.209.133", "210.22.97.1", "211.136.112.200",
 		"58.60.188.222", "210.21.196.6", "120.196.165.24",
 		"61.139.2.69", "119.6.6.6", "211.137.96.205",
 	}
-	names = []string{
+	ipv6s = []string{
+		"2408:80f0:4100:2005::10", // 北京电信 IPv6
+		"2408:8000:1010:1::6",     // 北京联通 IPv6
+		"2409:8000:1003:5::5",     // 北京移动 IPv6
+		"2408:8026:1:1::6",        // 上海联通 IPv6
+		"2409:8089:1020:50::6",    // 上海移动 IPv6
+	}
+	ipv4Names = []string{
 		"北京电信", "北京联通", "北京移动",
 		"上海电信", "上海联通", "上海移动",
 		"广州电信", "广州联通", "广州移动",
 		"成都电信", "成都联通", "成都移动",
 	}
+	ipv6Names = []string{
+		"北京电信v6", "北京联通v6", "北京移动v6",
+        "上海联通v6", "上海移动v6",
+	}
 	m = map[string]string{
 		// [] 前的字符串个数，中文占2个字符串
 		"AS23764": "电信CTGNET [精品线路]",
@@ -56,9 +67,9 @@ func removeDuplicates(elements []string) []string {
 }
 
 func trace(ch chan Result, i int) {
-	hops, err := Trace(net.ParseIP(ips[i]))
+	hops, err := Trace(net.ParseIP(ipv4s[i]))
 	if err != nil {
-		s := fmt.Sprintf("%v %-15s %v", names[i], ips[i], err)
+		s := fmt.Sprintf("%v %-15s %v", ipv4Names[i], ipv4s[i], err)
 		ch <- Result{i, s}
 		return
 	}
@@ -75,7 +86,7 @@ func trace(ch chan Result, i int) {
 	if asns != nil && len(asns) > 0 {
 		var tempText string
 		asns = removeDuplicates(asns)
-		tempText += fmt.Sprintf("%v ", names[i])
+		tempText += fmt.Sprintf("%v ", ipv4Names[i])
 		hasAS4134 := false
 		hasAS4809 := false
 		for _, asn := range asns {
@@ -94,7 +105,7 @@ func trace(ch chan Result, i int) {
 			// 仅包含 AS4809 属于 CN2GIA
 			asns = append([]string{"AS4809a"}, asns...)
 		}
-		tempText += fmt.Sprintf("%-15s ", ips[i])
+		tempText += fmt.Sprintf("%-15s ", ipv4s[i])
 		for _, asn := range asns {
 			asnDescription := m[asn]
 			switch asn {
@@ -128,17 +139,20 @@ func trace(ch chan Result, i int) {
 				}
 			}
 		}
-		if tempText == (fmt.Sprintf("%v ", names[i]) + fmt.Sprintf("%-15s ", ips[i])) {
+		if tempText == (fmt.Sprintf("%v ", ipv4Names[i]) + fmt.Sprintf("%-15s ", ipv4s[i])) {
 			tempText += fmt.Sprintf("%v", Red("检测不到已知线路的ASN"))
 		}
 		ch <- Result{i, tempText}
 	} else {
-		s := fmt.Sprintf("%v %-15s %v", names[i], ips[i], Red("检测不到回程路由节点的IP地址"))
+		s := fmt.Sprintf("%v %-15s %v", ipv4Names[i], ipv4s[i], Red("检测不到回程路由节点的IP地址"))
 		ch <- Result{i, s}
 	}
 }
 
 func ipAsn(ip string) string {
+	if strings.Contains(ip, ":") {
+		return ipv6Asn(ip)
+	}
 	switch {
 	case strings.HasPrefix(ip, "59.43"):
 		return "AS4809"

bk/backtrace.go

@@ -6,14 +6,17 @@ import (
 )
 
 func BackTrace() {
+    // 获取IP地址数量
+    ipCount := len(ipv4s)
     var (
-		s [12]string // 对应 ips 目标地址数量
+        s = make([]string, ipCount) // 动态分配切片大小
         c = make(chan Result)
         t = time.After(time.Second * 10)
     )
-	for i := range ips {
+    for i := range ipv4s {
         go trace(c, i)
     }
+    
 loop:
     for range s {
         select {
@@ -23,7 +26,10 @@ loop:
             break loop
         }
     }
+    
     for _, r := range s {
+        if r != "" {
             fmt.Println(r)
         }
     }
+}

bk/ipv6_asn.go

@@ -0,0 +1,40 @@
+package backtrace
+
+import (
+	"strings"
+)
+
+// 识别IPv6地址的ASN
+func ipv6Asn(ip string) string {
+	switch {
+	// 电信CN2GIA
+	case strings.HasPrefix(ip, "2408:80"):
+		return "AS4809a"
+	// 电信CN2GT
+	case strings.HasPrefix(ip, "2408:8000"):
+		return "AS4809b"
+	// 电信163
+	case strings.HasPrefix(ip, "240e:") || strings.HasPrefix(ip, "2408:8"):
+		return "AS4134"
+	// 联通9929
+	case strings.HasPrefix(ip, "2408:8026:"):
+		return "AS9929"
+	// 联通4837
+	case strings.HasPrefix(ip, "2408:8000:"):
+		return "AS4837"
+	// 移动CMIN2
+	case strings.HasPrefix(ip, "2409:8880:"):
+		return "AS58807"
+	// 移动CMI
+	case strings.HasPrefix(ip, "2409:8000:") || strings.HasPrefix(ip, "2409:"):
+		return "AS9808"
+	// 移动CMI
+	case strings.HasPrefix(ip, "2407:") || strings.HasPrefix(ip, "2401:"):
+		return "AS58453"
+	// 电信CTGNET
+	case strings.HasPrefix(ip, "2402:0:") || strings.HasPrefix(ip, "2400:8:"):
+		return "AS23764"
+	default:
+		return ""
+	}
+}

bk/trace_common.go

@@ -21,7 +21,7 @@ var DefaultConfig = Config{
     Timeout:  500 * time.Millisecond,
     MaxHops:  15,
     Count:    1,
-	Networks: []string{"ip4:icmp", "ip4:ip"},
+    Networks: []string{"ip4:icmp", "ip4:ip", "ip6:ipv6-icmp", "ip6:ip"},
 }
 
 // DefaultTracer is a tracer with DefaultConfig.
@@ -126,17 +126,6 @@ func (t *Tracer) init() {
 			}
 		}
 	}
-	// 初始化IPv6 ICMP连接
-	c, err := net.ListenPacket("ip6:ipv6-icmp", "")
-	if err == nil {
-		p := ipv6.NewPacketConn(c)
-		if err := p.SetControlMessage(ipv6.FlagHopLimit|ipv6.FlagSrc|ipv6.FlagDst|ipv6.FlagInterface, true); err == nil {
-			t.ipv6conn = p
-			go t.serveIPv6(p)
-		} else {
-			c.Close()
-		}
-	}
 }
 
 // Close closes listening socket.
@@ -168,17 +157,38 @@ func (t *Tracer) serve(conn *net.IPConn) error {
 
 func (t *Tracer) serveData(from net.IP, b []byte) error {
     if from.To4() == nil {
-		// TODO: implement ProtocolIPv6ICMP
+        // IPv6 处理
+        msg, err := icmp.ParseMessage(ProtocolIPv6ICMP, b)
+        if err != nil {
+            return err
+        }
+        if msg.Type == ipv6.ICMPTypeEchoReply {
+            echo := msg.Body.(*icmp.Echo)
+            return t.serveReply(from, &packet{from, uint16(echo.ID), 1, time.Now()})
+        }
+        b = getReplyData(msg)
+        if len(b) < ipv6.HeaderLen {
+            return errMessageTooShort
+        }
+        switch b[0] >> 4 {
+        case ipv6.Version:
+            ip, err := ipv6.ParseHeader(b)
+            if err != nil {
+                return err
+            }
+            return t.serveReply(ip.Dst, &packet{from, uint16(ip.FlowLabel), ip.HopLimit, time.Now()})
+        default:
             return errUnsupportedProtocol
         }
-	now := time.Now()
+    } else {
+        // 原有的IPv4处理逻辑
         msg, err := icmp.ParseMessage(ProtocolICMP, b)
         if err != nil {
             return err
         }
         if msg.Type == ipv4.ICMPTypeEchoReply {
             echo := msg.Body.(*icmp.Echo)
-		return t.serveReply(from, &packet{from, uint16(echo.ID), 1, now})
+            return t.serveReply(from, &packet{from, uint16(echo.ID), 1, time.Now()})
         }
         b = getReplyData(msg)
         if len(b) < ipv4.HeaderLen {
@@ -190,26 +200,23 @@ func (t *Tracer) serveData(from net.IP, b []byte) error {
             if err != nil {
                 return err
             }
-		return t.serveReply(ip.Dst, &packet{from, uint16(ip.ID), ip.TTL, now})
+            return t.serveReply(ip.Dst, &packet{from, uint16(ip.ID), ip.TTL, time.Now()})
-	case ipv6.Version:
-		ip, err := ipv6.ParseHeader(b)
-		if err != nil {
-			return err
-		}
-		return t.serveReply(ip.Dst, &packet{from, uint16(ip.FlowLabel), ip.HopLimit, now})
         default:
             return errUnsupportedProtocol
         }
     }
+}
 
 func (t *Tracer) sendRequest(dst net.IP, ttl int) (*packet, error) {
+    id := uint16(atomic.AddUint32(&t.seq, 1))
+    var b []byte
     if dst.To4() == nil {
         // IPv6
-		return t.sendRequestV6(dst, ttl)
+        b = newPacketV6(id, dst, ttl)
+    } else {
+        // IPv4
+        b = newPacketV4(id, dst, ttl)
     }
-	// Ipv4
-	id := uint16(atomic.AddUint32(&t.seq, 1))
-	b := newPacketV4(id, dst, ttl)
     req := &packet{dst, id, ttl, time.Now()}
     _, err := t.conn.WriteToIP(b, &net.IPAddr{IP: dst})
     if err != nil {

bk/trace_ipv6.go

@@ -1,125 +1,36 @@
 package backtrace
 
 import (
+	"encoding/binary"
 	"net"
-	"sync/atomic"
-	"time"
 
 	"golang.org/x/net/icmp"
 	"golang.org/x/net/ipv6"
 )
 
-func newPacketV6(id uint16, dst net.IP, ttl int) ([]byte, error) {
+func newPacketV6(id uint16, dst net.IP, ttl int) []byte {
-	// 创建ICMPv6 Echo请求消息
+	// 创建ICMP消息（回显请求）
 	msg := icmp.Message{
 		Type: ipv6.ICMPTypeEchoRequest,
-		Code: 0,
 		Body: &icmp.Echo{
 			ID:  int(id),
 			Seq: int(id),
-			Data: []byte("TRACEROUTE"),
 		},
 	}
-
+	// 序列化ICMP消息
-	// 直接序列化ICMPv6消息
+	icmpData, _ := msg.Marshal(nil)
-	// 第一个参数是协议号，对于ICMPv6应该是58
+	// 手动创建原始IPv6数据包头部
-	return msg.Marshal(nil)
+	ipHeaderBytes := make([]byte, ipv6.HeaderLen)
-}
+	// 设置版本和流量类别（第一个字节）
-
+	ipHeaderBytes[0] = (ipv6.Version << 4)
-func (t *Tracer) sendRequestV6(dst net.IP, ttl int) (*packet, error) {
+	// 设置下一个头部（协议）
-	id := uint16(atomic.AddUint32(&t.seq, 1))
+	ipHeaderBytes[6] = ProtocolIPv6ICMP
-	// 创建ICMPv6消息
+	// 设置跳数限制
-	msg := icmp.Message{
+	ipHeaderBytes[7] = byte(ttl)
-		Type: ipv6.ICMPTypeEchoRequest,
+	// 设置有效载荷长度（2字节字段）
-		Code: 0,
+	binary.BigEndian.PutUint16(ipHeaderBytes[4:6], uint16(len(icmpData)))
-		Body: &icmp.Echo{
+	// 设置目标地址（最后16个字节）
-			ID:   int(id),
+	copy(ipHeaderBytes[24:40], dst.To16())
-			Seq:  int(id),
+	// 合并头部和ICMP数据
-			Data: []byte("TRACEROUTE"),
+	return append(ipHeaderBytes, icmpData...)
-		},
-	}
-	// 序列化ICMPv6消息
-	b, err := msg.Marshal(nil)
-	if err != nil {
-		return nil, err
-	}
-	// 获取底层连接
-	ipv6Conn, err := t.getIPv6Conn()
-	if err != nil {
-		return nil, err
-	}
-	// 设置IPv6数据包的跳数限制(TTL)
-	if err := ipv6Conn.SetHopLimit(ttl); err != nil {
-		return nil, err
-	}
-	// 发送数据包
-	if _, err := ipv6Conn.WriteTo(b, nil, &net.IPAddr{IP: dst}); err != nil {
-		return nil, err
-	}
-	// 创建一个数据包记录，用于后续匹配回复
-	req := &packet{dst, id, ttl, time.Now()}
-	return req, nil
-}
-
-// getIPv6Conn 获取IPv6的PacketConn接口
-func (t *Tracer) getIPv6Conn() (*ipv6.PacketConn, error) {
-	if t.ipv6conn != nil {
-		return t.ipv6conn, nil
-	}
-	// 创建一个UDP连接
-	c, err := net.ListenPacket("udp6", "::")
-	if err != nil {
-		return nil, err
-	}
-	// 将其包装为IPv6 PacketConn
-	p := ipv6.NewPacketConn(c)
-	// 设置控制消息
-	if err := p.SetControlMessage(ipv6.FlagHopLimit|ipv6.FlagSrc|ipv6.FlagDst|ipv6.FlagInterface, true); err != nil {
-		c.Close()
-		return nil, err
-	}
-	t.ipv6conn = p
-	return p, nil
-}
-
-func (t *Tracer) serveIPv6(conn *ipv6.PacketConn) error {
-	defer conn.Close()
-	buf := make([]byte, 1500)
-	for {
-		n, cm, src, err := conn.ReadFrom(buf)
-		if err != nil {
-			return err
-		}
-		// 从控制消息中获取跳数限制
-		hopLimit := 0
-		if cm != nil {
-			hopLimit = cm.HopLimit
-		}
-		// 解析ICMP消息
-		msg, err := icmp.ParseMessage(ProtocolIPv6ICMP, buf[:n])
-		if err != nil {
-			continue
-		}
-		// 根据消息类型处理
-		switch msg.Type {
-		case ipv6.ICMPTypeEchoReply:
-			echo := msg.Body.(*icmp.Echo)
-			t.serveReply(src.(*net.IPAddr).IP, &packet{src.(*net.IPAddr).IP, uint16(echo.ID), hopLimit, time.Now()})
-		case ipv6.ICMPTypeTimeExceeded:
-			// 处理超时消息，获取原始数据包
-			data := msg.Body.(*icmp.TimeExceeded).Data
-			// 尝试提取嵌入的原始Echo请求
-			if len(data) < 8 { // 至少需要IPv6头部前8个字节
-				continue
-			}
-			// 跳过IPv6头部和ICMPv6头部，简化处理，实际可能需要更复杂的解析
-			innerMsg, err := icmp.ParseMessage(ProtocolIPv6ICMP, data[48:])
-			if err != nil {
-				continue
-			}
-			if echo, ok := innerMsg.Body.(*icmp.Echo); ok {
-				t.serveReply(src.(*net.IPAddr).IP, &packet{src.(*net.IPAddr).IP, uint16(echo.ID), hopLimit, time.Now()})
-			}
-		}
-	}
 }