Function IterateAddr

utils.go:193–252

IterateAddr 无限扫描模式，从指定IP开始向上下扩展

(addr string)

// IterateAddr 无限扫描模式，从指定IP开始向上下扩展
func IterateAddr(addr string) <-chan Host {
	hostChan := make(chan Host, 100)
	
	go func() {
		defer close(hostChan)
		
		// 解析初始IP
		initialIP := net.ParseIP(addr)
		if initialIP == nil {
			printError(fmt.Sprintf("无效的IP地址: %s", addr))
			return
		}
		
		// 发送初始IP
		hostChan <- Host{
			IP:     initialIP,
			Origin: addr,
			Type:   HostTypeIP,
		}
		
		// 设置上下扩展的IP
		lowIP := make(net.IP, len(initialIP))
		highIP := make(net.IP, len(initialIP))
		copy(lowIP, initialIP)
		copy(highIP, initialIP)
		
		// 交替向上下扩展
		for i := 0; i < math.MaxInt; i++ {
			if i%2 == 0 {
				// 向下扩展
				lowIP = NextIP(lowIP, false)
				if !isValidIP(lowIP) {
					continue
				}
				newLowHost := Host{
					IP:     make(net.IP, len(lowIP)),
					Origin: addr,
					Type:   HostTypeIP,
				}
				copy(newLowHost.IP, lowIP)
				hostChan <- newLowHost
			} else {
				// 向上扩展
				highIP = NextIP(highIP, true)
				if !isValidIP(highIP) {
					continue
				}
				newHighHost := Host{
					IP:     make(net.IP, len(highIP)),
					Origin: addr,
					Type:   HostTypeIP,
				}
				copy(newHighHost.IP, highIP)
				hostChan <- newHighHost
			}
		}
	}()