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@@ -27,7 +27,7 @@ func randipEndWith(num int) uint8 {
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return uint8(rand.Intn(num))
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}
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-func LoadIPRanges() []*net.IPAddr {
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+func loadIPRanges() []*net.IPAddr {
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if IPFile == "" {
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IPFile = defaultInputFile
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}
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@@ -38,64 +38,72 @@ func LoadIPRanges() []*net.IPAddr {
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defer file.Close()
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firstIPs := make([]*net.IPAddr, 0)
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scanner := bufio.NewScanner(file)
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- // scanner.Split(bufio.ScanLines)
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for scanner.Scan() {
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- IPString := scanner.Text()
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+ ipString := scanner.Text()
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// 如果不含有 '/' 则代表不是 IP 段,而是一个单独的 IP,因此需要加上 /32 /128 子网掩码
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- if !strings.Contains(IPString, "/") {
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+ if !strings.Contains(ipString, "/") {
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+ mask := "/32"
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if IPv6 {
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- IPString += "/128"
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- } else {
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- IPString += "/32"
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+ mask = "/128"
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}
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- }
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- firstIP, IPRange, err := net.ParseCIDR(IPString)
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- // fmt.Println(firstIP)
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- // fmt.Println(IPRange)
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- if err != nil {
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- log.Fatal(err)
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+ ipString += mask
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}
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if IPv6 {
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//IPv6
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- loadIPv6(IPString, IPRange, firstIP, firstIPs)
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+ firstIPs = append(firstIPs, loadIPv6(ipString)...)
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continue
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}
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// IPv4
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- minIP, maxIP, mask := getCidrIPRange(IPString) // 获取 IP 最后一段最小值和最大值
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- maxIPNum := getCidrHostNum(mask) // 根据子网掩码获取主机数量
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- for IPRange.Contains(firstIP) {
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- if TestAll { // 如果是测速全部 IP
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- for i := minIP; i <= maxIP; i++ { // 遍历 IP 最后一段最小值到最大值
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- firstIP[15] = i
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- firstIPCopy := make([]byte, len(firstIP))
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- copy(firstIPCopy, firstIP)
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- firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
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- }
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- } else { // 随机 IP 的最后一段 0.0.0.X
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- firstIP[15] = minIP + randipEndWith(maxIPNum)
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+ firstIPs = append(firstIPs, loadIPv4(ipString)...)
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+ }
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+ return firstIPs
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+}
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+
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+func loadIPv4(ipString string) (firstIPs []*net.IPAddr) {
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+ firstIP, IPRange, err := net.ParseCIDR(ipString)
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+ // fmt.Println(firstIP)
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+ // fmt.Println(IPRange)
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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+ minIP, maxIP, hostNum := getCidrIPRange(ipString) // 获取 IP 最后一段最小值和最大值
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+ for IPRange.Contains(firstIP) {
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+ if TestAll { // 如果是测速全部 IP
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+ for i := minIP; i <= maxIP; i++ { // 遍历 IP 最后一段最小值到最大值
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+ firstIP[15] = i
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firstIPCopy := make([]byte, len(firstIP))
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copy(firstIPCopy, firstIP)
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firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
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}
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- firstIP[14]++ // 0.0.(X+1).X
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- if firstIP[14] == 0 {
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- firstIP[13]++ // 0.(X+1).X.X
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- if firstIP[13] == 0 {
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- firstIP[12]++ // (X+1).X.X.X
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- }
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+ } else { // 随机 IP 的最后一段 0.0.0.X
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+ firstIP[15] = minIP + randipEndWith(hostNum)
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+ firstIPCopy := make([]byte, len(firstIP))
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+ copy(firstIPCopy, firstIP)
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+ firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
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+ }
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+ firstIP[14]++ // 0.0.(X+1).X
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+ if firstIP[14] == 0 {
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+ firstIP[13]++ // 0.(X+1).X.X
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+ if firstIP[13] == 0 {
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+ firstIP[12]++ // (X+1).X.X.X
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}
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}
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-
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}
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- return firstIPs
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+ return
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}
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-func loadIPv6(IPString string, IPRange *net.IPNet, firstIP net.IP, firstIPs []*net.IPAddr) {
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+func loadIPv6(ipString string) (firstIPs []*net.IPAddr) {
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+ firstIP, IPRange, err := net.ParseCIDR(ipString)
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+ // fmt.Println(firstIP)
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+ // fmt.Println(IPRange)
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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var tempIP uint8
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for IPRange.Contains(firstIP) {
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//fmt.Println(firstIP)
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//fmt.Println(firstIP[0], firstIP[1], firstIP[2], firstIP[3], firstIP[4], firstIP[5], firstIP[6], firstIP[7], firstIP[8], firstIP[9], firstIP[10], firstIP[11], firstIP[12], firstIP[13], firstIP[14], firstIP[15])
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- if !strings.Contains(IPString, "/128") {
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+ if !strings.Contains(ipString, "/128") {
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firstIP[15] = randipEndWith(255) // 随机 IP 的最后一段
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firstIP[14] = randipEndWith(255) // 随机 IP 的最后一段
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}
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@@ -170,41 +178,44 @@ func loadIPv6(IPString string, IPRange *net.IPNet, firstIP net.IP, firstIPs []*n
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tempIP = firstIP[0]
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firstIP[0] += randipEndWith(255)
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}
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+ return
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}
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// 根据子网掩码获取主机数量
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-func getCidrHostNum(maskLen int) int {
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- cidrIPNum := int(0)
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- if maskLen < 32 {
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- var i int = int(32 - maskLen - 1)
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- for ; i >= 1; i-- {
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- cidrIPNum += 1 << i
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- }
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- cidrIPNum += 2
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- } else {
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- cidrIPNum = 1
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+func getCIDRHostNum(mask uint8) (subnetNum int) {
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+ if mask >= 32 {
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+ return 1
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}
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- if cidrIPNum > 255 {
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- cidrIPNum = 255
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+
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+ if mask < 32 {
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+ for i := int(32 - mask - 1); i >= 1; i-- {
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+ subnetNum += 1 << i
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+ }
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+ subnetNum += 2
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}
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- return cidrIPNum
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+ if subnetNum > 0xFF {
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+ subnetNum = 0xFF
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+ }
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+ return
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}
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-// 获取 IP 最后一段最小值和最大值、子网掩码
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-func getCidrIPRange(cidr string) (minIP, maxIP uint8, mask int) {
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- ipRange := strings.Split(cidr, "/")
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- ipSegs := strings.Split(ipRange[0], ".")
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- mask, _ = strconv.Atoi(ipRange[1])
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- seg4, _ := strconv.Atoi(ipSegs[3])
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+// 获取 IP 最后一段最小值和最大值、主机数量
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+func getCidrIPRange(cidr string) (minIP, maxIP uint8, ipNum int) {
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+ i := strings.IndexByte(cidr, '/')
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+ addr := cidr[:i]
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+ mask, _ := strconv.ParseUint(cidr[i+1:], 10, 8)
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+ i = strings.LastIndexByte(addr, '.')
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+ seg4, _ := strconv.ParseUint(addr[i+1:], 10, 8)
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minIP, maxIP = getIPSegRange(uint8(seg4), uint8(32-mask))
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+ ipNum = getCIDRHostNum(uint8(mask))
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return
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}
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// 根据输入的基础IP地址和CIDR掩码计算一个IP片段的区间
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func getIPSegRange(userSegIP, offset uint8) (uint8, uint8) {
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- var ipSegMax uint8 = 255
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+ var ipSegMax uint8 = 0xFF
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netSegIP := ipSegMax << offset
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segMinIP := netSegIP & userSegIP
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- segMaxIP := userSegIP&(255<<offset) | ^(255 << offset)
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+ segMaxIP := userSegIP&(0xFF<<offset) | ^(0xFF << offset)
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return segMinIP, segMaxIP
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}
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