优化 IP 段子网掩码解析
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xiu2
parent
c8ef175207
commit
976dd79913
143
IPRangeLoader.go
143
IPRangeLoader.go
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@ -9,18 +9,49 @@ import (
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"strings"
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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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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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cidrIPNum += 1 << i
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}
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cidrIpNum += 2
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cidrIPNum += 2
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} else {
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cidrIpNum = 1
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cidrIPNum = 1
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}
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return cidrIpNum
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if cidrIPNum > 255 {
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cidrIPNum = 255
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}
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return cidrIPNum
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}
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// 获取 IP 最后一段最小值和最大值
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func getCidrIPRange(cidr string) (uint8, uint8) {
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ip := strings.Split(cidr, "/")[0]
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ipSegs := strings.Split(ip, ".")
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maskLen, _ := strconv.Atoi(strings.Split(cidr, "/")[1])
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seg4MinIP, seg4MaxIP := getIPSeg4Range(ipSegs, maskLen)
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//ipPrefix := ipSegs[0] + "." + ipSegs[1] + "." + ipSegs[2] + "."
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return seg4MinIP,
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seg4MaxIP
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}
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// 获取 IP 最后一段的区间
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func getIPSeg4Range(ipSegs []string, maskLen int) (uint8, uint8) {
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ipSeg, _ := strconv.Atoi(ipSegs[3])
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return getIPSegRange(uint8(ipSeg), uint8(32-maskLen))
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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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netSegIP := ipSegMax << offset
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segMinIP := netSegIP & userSegIP
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segMaxIP := userSegIP&(255<<offset) | ^(255 << offset)
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return uint8(segMinIP), uint8(segMaxIP)
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}
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func loadFirstIPOfRangeFromFile(ipFile string) []net.IPAddr {
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@ -36,67 +67,86 @@ func loadFirstIPOfRangeFromFile(ipFile string) []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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Mask, _ := strconv.Atoi(strings.Split(scanner.Text(), "/")[1])
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MaxIPNum := getCidrHostNum(Mask)
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if MaxIPNum > 255 {
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MaxIPNum = 255
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}
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//fmt.Println(MaxIPNum)
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if err != nil {
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log.Fatal(err)
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}
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if ipv6Mode { // IPv6
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if !ipv6Mode { // IPv4
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minIP, maxIP := getCidrIPRange(scanner.Text()) // 获取 IP 最后一段最小值和最大值
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Mask, _ := strconv.Atoi(strings.Split(scanner.Text(), "/")[1]) // 获取子网掩码
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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 allip { // 如果是测速全部 IP
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for i := int(minIP); i <= int(maxIP); i++ { // 遍历 IP 最后一段最小值到最大值
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firstIP[15] = uint8(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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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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} else { //IPv6
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var tempIP uint8
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MaxIPNum = 255
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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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firstIP[15] = randipEndWith(MaxIPNum) // 随机 IP 的最后一段
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firstIP[14] = randipEndWith(MaxIPNum) // 随机 IP 的最后一段
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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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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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tempIP = firstIP[13]
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firstIP[13] += randipEndWith(MaxIPNum)
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firstIP[13] += randipEndWith(255)
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if firstIP[13] < tempIP {
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tempIP = firstIP[12]
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firstIP[12] += randipEndWith(MaxIPNum)
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firstIP[12] += randipEndWith(255)
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if firstIP[12] < tempIP {
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tempIP = firstIP[11]
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firstIP[11] += randipEndWith(MaxIPNum)
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firstIP[11] += randipEndWith(255)
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if firstIP[11] < tempIP {
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tempIP = firstIP[10]
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firstIP[10] += randipEndWith(MaxIPNum)
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firstIP[10] += randipEndWith(255)
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if firstIP[10] < tempIP {
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tempIP = firstIP[9]
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firstIP[9] += randipEndWith(MaxIPNum)
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firstIP[9] += randipEndWith(255)
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if firstIP[9] < tempIP {
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tempIP = firstIP[8]
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firstIP[8] += randipEndWith(MaxIPNum)
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firstIP[8] += randipEndWith(255)
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if firstIP[8] < tempIP {
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tempIP = firstIP[7]
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firstIP[7] += randipEndWith(MaxIPNum)
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firstIP[7] += randipEndWith(255)
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if firstIP[7] < tempIP {
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tempIP = firstIP[6]
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firstIP[6] += randipEndWith(MaxIPNum)
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firstIP[6] += randipEndWith(255)
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if firstIP[6] < tempIP {
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tempIP = firstIP[5]
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firstIP[5] += randipEndWith(MaxIPNum)
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firstIP[5] += randipEndWith(255)
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if firstIP[5] < tempIP {
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tempIP = firstIP[4]
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firstIP[4] += randipEndWith(MaxIPNum)
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firstIP[4] += randipEndWith(255)
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if firstIP[4] < tempIP {
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tempIP = firstIP[3]
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firstIP[3] += randipEndWith(MaxIPNum)
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firstIP[3] += randipEndWith(255)
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if firstIP[3] < tempIP {
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tempIP = firstIP[2]
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firstIP[2] += randipEndWith(MaxIPNum)
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firstIP[2] += randipEndWith(255)
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if firstIP[2] < tempIP {
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tempIP = firstIP[1]
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firstIP[1] += randipEndWith(MaxIPNum)
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firstIP[1] += randipEndWith(255)
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if firstIP[1] < tempIP {
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tempIP = firstIP[0]
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firstIP[0] += randipEndWith(MaxIPNum)
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firstIP[0] += randipEndWith(255)
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}
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}
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}
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@ -111,41 +161,6 @@ func loadFirstIPOfRangeFromFile(ipFile string) []net.IPAddr {
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}
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}
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}
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} else { //IPv4
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for IPRange.Contains(firstIP) {
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//fmt.Println(firstIP)
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//fmt.Println(firstIP[15])
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if allip {
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if firstIP[15] == 0 { // 当 IP 最后一段为 0 时会按顺序生成 IP
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for i := 0; i < MaxIPNum; i++ {
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firstIP[15] = uint8(i) // 按顺序生成 IP 的最后一段 0.0.0.X
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//fmt.Println(firstIP)
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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 { // 当 IP 最后一段不为 0 时，则保留 IP 最后一段
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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 {
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if firstIP[15] == 0 {
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firstIP[15] = randipEndWith(MaxIPNum) // 随机 IP 的最后一段 0.0.0.X
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}
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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[15] = 0
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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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}
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return firstIPs
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