Files
NTrace-core/reporter/reporter.go
2022-05-27 17:19:58 +08:00

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package reporter
import (
"fmt"
"net"
"strings"
"sync"
"github.com/xgadget-lab/nexttrace/ipgeo"
"github.com/xgadget-lab/nexttrace/trace"
)
type Reporter interface {
Print()
}
func New(rs *trace.Result, ip string) Reporter {
experimentTag()
r := reporter{
routeResult: rs,
targetIP: ip,
}
return &r
}
type reporter struct {
targetTTL uint16
targetIP string
routeReport map[uint16][]routeReportNode
routeReportLock sync.Mutex
routeResult *trace.Result
wg sync.WaitGroup
}
type routeReportNode struct {
asn string
isp string
geo []string
ix bool
}
func experimentTag() {
fmt.Println("Route-Path 功能实验室")
}
func (r *reporter) generateRouteReportNode(ip string, ipGeoData ipgeo.IPGeoData, ttl uint16) {
var success bool = true
defer r.wg.Done()
rpn := routeReportNode{}
ptr, err := net.LookupAddr(ip)
if err == nil {
if strings.Contains(strings.ToLower(ptr[0]), "ix") {
rpn.ix = true
} else {
rpn.ix = false
}
}
// TODO: 这种写法不好,后面再重构一下
// 判断反向解析的域名中又或者是IP地理位置数据库中是否出现了 IX
if strings.Contains(strings.ToLower(ipGeoData.Isp), "exchange") || strings.Contains(strings.ToLower(ipGeoData.Isp), "ix") || strings.Contains(strings.ToLower(ipGeoData.Owner), "exchange") || strings.Contains(strings.ToLower(ipGeoData.Owner), "ix") {
rpn.ix = true
}
// TODO: 正则判断POP并且提取带宽大小等信息
// CN2 需要特殊处理因为他们很多没有ASN
// 但是目前这种写法是不规范的属于凭空标记4809的IP
// TODO: 用更好的方式显示 CN2 骨干网的路由 Path
if strings.HasPrefix(ip, "59.43") {
rpn.asn = "4809"
} else {
rpn.asn = ipGeoData.Asnumber
}
// 无论最后一跳是否为存在地理位置信息AnyCast都应该给予显示
if (ipGeoData.Country == "" || ipGeoData.Country == "LAN Address" || ipGeoData.Country == "-") && ip != r.targetIP {
success = false
} else {
if ipGeoData.City == "" {
rpn.geo = []string{ipGeoData.Country, ipGeoData.Prov}
} else {
rpn.geo = []string{ipGeoData.Country, ipGeoData.City}
}
}
if ipGeoData.Asnumber == "" {
rpn.asn = "*"
}
if ipGeoData.Isp == "" {
rpn.isp = ipGeoData.Owner
} else {
rpn.isp = ipGeoData.Isp
}
// 有效记录
if success {
// 锁住资源防止同时写panic
r.routeReportLock.Lock()
// 添加到MAP中
r.routeReport[ttl] = append(r.routeReport[ttl], rpn)
// 写入完成,解锁释放资源给其他协程
r.routeReportLock.Unlock()
}
}
func (r *reporter) InitialBaseData() Reporter {
reportNodes := map[uint16][]routeReportNode{}
r.routeReport = reportNodes
r.targetTTL = uint16(len(r.routeResult.Hops))
for i := uint16(0); i < r.targetTTL; i++ {
traceHop := r.routeResult.Hops[i][0]
if traceHop.Success {
currentIP := traceHop.Address.String()
r.wg.Add(1)
go r.generateRouteReportNode(currentIP, *traceHop.Geo, i)
}
}
// 等待所有的子协程运行完毕
r.wg.Wait()
return r
}
func (r *reporter) Print() {
var beforeActiveTTL uint16 = 0
r.InitialBaseData()
// 尝试首个有效 TTL
for i := uint16(0); i < r.targetTTL; i++ {
if len(r.routeReport[i]) != 0 {
beforeActiveTTL = i
// 找到以后便不再循环
break
}
}
for i := beforeActiveTTL; i < r.targetTTL; i++ {
// 计算该TTL内的数据长度如果为0则代表没有有效数据
if len(r.routeReport[i]) == 0 {
// 跳过改跃点的数据整理
continue
}
nodeReport := r.routeReport[i][0]
if i == beforeActiveTTL {
fmt.Printf("AS%s %s「%s『%s", nodeReport.asn, nodeReport.isp, nodeReport.geo[0], nodeReport.geo[1])
} else {
nodeReportBefore := r.routeReport[beforeActiveTTL][0]
// ASN 相同,同个 ISP 内部的数据传递
if nodeReportBefore.asn == nodeReport.asn {
// Same ASN but Coutry or City Changed
if nodeReportBefore.geo[0] != nodeReport.geo[0] {
fmt.Printf("』→ %s『%s", nodeReport.geo[0], nodeReport.geo[1])
} else {
if nodeReportBefore.geo[1] != nodeReport.geo[1] {
fmt.Printf(" → %s", nodeReport.geo[1])
}
}
} else {
// ASN 不同,跨 ISP 的数据传递,这里可能会出现 POP、IP Transit、Peer、Exchange
fmt.Printf("』」")
if int(i) != len(r.routeReport)+1 {
// 部分 Shell 客户端可能无法很好的展示这个特殊字符
// TODO: 寻找其他替代字符
fmt.Printf("\n ╭╯\n ╰")
}
if nodeReport.ix {
fmt.Printf("AS%s \033[42;37mIXP\033[0m %s「%s『%s", nodeReport.asn, nodeReport.isp, nodeReport.geo[0], nodeReport.geo[1])
} else {
fmt.Printf("AS%s %s「%s『%s", nodeReport.asn, nodeReport.isp, nodeReport.geo[0], nodeReport.geo[1])
}
}
}
// 标记为最新的一个有效跃点
beforeActiveTTL = i
}
fmt.Println("』」")
}