add: 新增起始TTL参数

fast_trace/fast_trace.go

@@ -20,6 +20,7 @@ func (f *FastTracer) tracert(location string, ispCollection ISPCollection) {
 	fmt.Printf("traceroute to %s, 30 hops max, 32 byte packets\n", ispCollection.IP)
 	ip := net.ParseIP(ispCollection.IP)
 	var conf = trace.Config{
+		BeginHop:         1,
 		DestIP:           ip,
 		DestPort:         80,
 		MaxHops:          30,

main.go

@@ -29,6 +29,7 @@ var dataOrigin = fSet.String("d", "LeoMoeAPI", "Choose IP Geograph Data Provider
 var noRdns = fSet.Bool("n", false, "Disable IP Reverse DNS lookup")
 var routePath = fSet.Bool("report", false, "Route Path")
 var tablePrint = fSet.Bool("table", false, "Output trace results as table")
+var beginHop = fSet.Int("b", 1, "Set The Begin TTL")
 var ver = fSet.Bool("V", false, "Print Version")
 
 func printArgHelp() {
@@ -105,6 +106,7 @@ func main() {
 	}
 
 	var conf = trace.Config{
+		BeginHop:         *beginHop,
 		DestIP:           ip,
 		DestPort:         *port,
 		MaxHops:          *maxHops,

trace/icmp_ipv4.go

@@ -45,7 +45,7 @@ func (t *ICMPTracer) Execute() (*Result, error) {
 
 	go t.listenICMP()
 
-	for ttl := 1; ttl <= t.MaxHops; ttl++ {
+	for ttl := t.BeginHop; ttl <= t.MaxHops; ttl++ {
 		if t.final != -1 && ttl > t.final {
 			break
 		}

trace/icmp_ipv6.go

@@ -44,7 +44,7 @@ func (t *ICMPTracerv6) Execute() (*Result, error) {
 
 	go t.listenICMP()
 
-	for ttl := 1; ttl <= t.MaxHops; ttl++ {
+	for ttl := t.BeginHop; ttl <= t.MaxHops; ttl++ {
 		if t.final != -1 && ttl > t.final {
 			break
 		}

trace/tcp_ipv4.go

@@ -63,7 +63,7 @@ func (t *TCPTracer) Execute() (*Result, error) {
 
 	t.sem = semaphore.NewWeighted(int64(t.ParallelRequests))
 
-	for ttl := 1; ttl <= t.MaxHops; ttl++ {
+	for ttl := t.BeginHop; ttl <= t.MaxHops; ttl++ {
 		// 如果到达最终跳，则退出
 		if t.final != -1 && ttl > t.final {
 			break

trace/trace.go

@@ -16,6 +16,7 @@ var (
 )
 
 type Config struct {
+	BeginHop         int
 	MaxHops          int
 	NumMeasurements  int
 	ParallelRequests int