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105 lines
3.2 KiB
Go
105 lines
3.2 KiB
Go
package printer
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import (
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"fmt"
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"strings"
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"github.com/nxtrace/NTrace-core/trace"
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)
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type HopInfo int
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const (
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General HopInfo = 0
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IXP HopInfo = 1
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Peer HopInfo = 2
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PoP HopInfo = 3
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Aboard HopInfo = 4
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)
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func findLatestAvailableHop(res *trace.Result, ttl int, probesIndex int) int {
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for ttl > 0 {
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// 查找上一个跃点是不是有效结果
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ttl--
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// 判断此TTL跃点是否有效并判断地理位置结构体是否已经初始化
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if len(res.Hops[ttl]) != 0 && res.Hops[ttl][probesIndex].Success && res.Hops[ttl][probesIndex].Geo != nil {
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// TTL虽有效，但地理位置API没有能够正确返回数据，依旧不能视为有效数据
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if res.Hops[ttl][probesIndex].Geo.Country == "" {
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// 跳过继续寻找上一个有效跃点
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continue
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}
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return ttl
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}
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}
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// 没找到
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return -1
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}
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func unifyName(name string) string {
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if name == "China" || name == "CN" {
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return "中国"
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} else if name == "Hong kong" || name == "香港" || name == "Central and Western" {
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return "中国香港"
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} else if name == "Taiwan" || name == "台湾" {
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return "中国台湾"
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} else {
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return name
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}
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}
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func chinaISPPeer(hostname string) bool {
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var keyWords = []string{"china", "ct", "cu", "cm", "cnc", "4134", "4837", "4809", "9929"}
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for _, k := range keyWords {
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if strings.Contains(strings.ToLower(hostname), k) {
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return true
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}
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}
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return false
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}
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func chinaMainland(h trace.Hop) bool {
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if unifyName(h.Geo.Country) == "中国" && unifyName(h.Geo.Prov) != "中国香港" && unifyName(h.Geo.Prov) != "中国台湾" {
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return true
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} else {
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return false
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}
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}
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func makeHopsType(res *trace.Result, ttl int) map[int]HopInfo {
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// 创建一个字典，存放所有当前TTL的跃点类型集合
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hopProbesMap := make(map[int]HopInfo)
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for i := range res.Hops[ttl] {
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// 判断是否res.Hops[ttl][i]是一个有效的跃点并且地理位置信息已经初始化
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if res.Hops[ttl][i].Success && res.Hops[ttl][i].Geo != nil {
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if availableTTL := findLatestAvailableHop(res, ttl, i); availableTTL != -1 {
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switch {
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case strings.Contains(res.Hops[ttl][i].Geo.District, "IXP") || strings.Contains(strings.ToLower(res.Hops[ttl][i].Hostname), "ix"):
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hopProbesMap[i] = IXP
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case strings.Contains(res.Hops[ttl][i].Geo.District, "Peer") || chinaISPPeer(res.Hops[ttl][i].Hostname):
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hopProbesMap[i] = Peer
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case strings.Contains(res.Hops[ttl][i].Geo.District, "PoP"):
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hopProbesMap[i] = PoP
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// 2个有效跃点必须都为有效数据，如果当前跳没有地理位置信息或者为局域网，不能视为有效节点
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case res.Hops[availableTTL][i].Geo.Country != "LAN Address" && res.Hops[ttl][i].Geo.Country != "LAN Address" && res.Hops[ttl][i].Geo.Country != "" &&
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// 一个跃点在中国大陆，另外一个跃点在其他地区，则可以推断出数据包跨境
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chinaMainland(res.Hops[availableTTL][i]) != chinaMainland(res.Hops[ttl][i]):
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// TODO: 将先后2跳跃点信息汇报给API，以完善相关数据
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hopProbesMap[i] = Aboard
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}
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} else {
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hopProbesMap[i] = General
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}
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}
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}
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return hopProbesMap
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}
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func ClassicPrinter(res *trace.Result, ttl int) {
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fmt.Print(ttl + 1)
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hopsTypeMap := makeHopsType(res, ttl)
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for i := range res.Hops[ttl] {
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HopPrinter(res.Hops[ttl][i], hopsTypeMap[i])
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}
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}
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