perf: 优化PortScan.go的代码，添加注释，规范输出

Plugins/PortScan.go

@@ -4,115 +4,133 @@ import (
 	"fmt"
 	"github.com/shadow1ng/fscan/Common"
 	"sort"
-	"strconv"
 	"sync"
 	"time"
 )
 
+// Addr 表示待扫描的地址
 type Addr struct {
-	ip   string
-	port int
+	ip   string // IP地址
+	port int    // 端口号
 }
 
+// PortScan 执行端口扫描
 func PortScan(hostslist []string, ports string, timeout int64) []string {
 	var AliveAddress []string
+
+	// 解析端口列表
 	probePorts := Common.ParsePort(ports)
 	if len(probePorts) == 0 {
-		fmt.Printf("[-] parse port %s error, please check your port format\n", ports)
+		fmt.Printf("[-] 端口格式错误: %s, 请检查端口格式\n", ports)
 		return AliveAddress
 	}
-	noPorts := Common.ParsePort(Common.NoPorts)
-	if len(noPorts) > 0 {
-		temp := map[int]struct{}{}
-		for _, port := range probePorts {
-			temp[port] = struct{}{}
-		}
 
-		for _, port := range noPorts {
-			delete(temp, port)
-		}
+	// 排除指定端口
+	probePorts = excludeNoPorts(probePorts)
 
-		var newDatas []int
-		for port := range temp {
-			newDatas = append(newDatas, port)
-		}
-		probePorts = newDatas
-		sort.Ints(probePorts)
-	}
+	// 创建通道
 	workers := Common.Threads
-	Addrs := make(chan Addr, 100)
+	addrs := make(chan Addr, 100)
 	results := make(chan string, 100)
 	var wg sync.WaitGroup
 
-	//接收结果
-	go func() {
-		for found := range results {
-			AliveAddress = append(AliveAddress, found)
-			wg.Done()
-		}
-	}()
+	// 接收扫描结果
+	go collectResults(&AliveAddress, results, &wg)
 
-	//多线程扫描
+	// 启动扫描协程
 	for i := 0; i < workers; i++ {
 		go func() {
-			for addr := range Addrs {
+			for addr := range addrs {
 				PortConnect(addr, results, timeout, &wg)
 				wg.Done()
 			}
 		}()
 	}
 
-	//添加扫描目标
+	// 添加扫描目标
 	for _, port := range probePorts {
 		for _, host := range hostslist {
 			wg.Add(1)
-			Addrs <- Addr{host, port}
+			addrs <- Addr{host, port}
 		}
 	}
+
 	wg.Wait()
-	close(Addrs)
+	close(addrs)
 	close(results)
 	return AliveAddress
 }
 
-func PortConnect(addr Addr, respondingHosts chan<- string, adjustedTimeout int64, wg *sync.WaitGroup) {
-	host, port := addr.ip, addr.port
-	conn, err := Common.WrapperTcpWithTimeout("tcp4", fmt.Sprintf("%s:%v", host, port), time.Duration(adjustedTimeout)*time.Second)
-	if err == nil {
-		defer conn.Close()
-		address := host + ":" + strconv.Itoa(port)
-		result := fmt.Sprintf("%s open", address)
-		Common.LogSuccess(result)
-		wg.Add(1)
-		respondingHosts <- address
+// collectResults 收集扫描结果
+func collectResults(aliveAddrs *[]string, results <-chan string, wg *sync.WaitGroup) {
+	for found := range results {
+		*aliveAddrs = append(*aliveAddrs, found)
+		wg.Done()
 	}
 }
 
-func NoPortScan(hostslist []string, ports string) (AliveAddress []string) {
-	probePorts := Common.ParsePort(ports)
-	noPorts := Common.ParsePort(Common.NoPorts)
-	if len(noPorts) > 0 {
-		temp := map[int]struct{}{}
-		for _, port := range probePorts {
-			temp[port] = struct{}{}
-		}
+// PortConnect 尝试连接指定端口
+func PortConnect(addr Addr, respondingHosts chan<- string, timeout int64, wg *sync.WaitGroup) {
+	// 建立TCP连接
+	conn, err := Common.WrapperTcpWithTimeout("tcp4",
+		fmt.Sprintf("%s:%v", addr.ip, addr.port),
+		time.Duration(timeout)*time.Second)
 
-		for _, port := range noPorts {
-			delete(temp, port)
-		}
-
-		var newDatas []int
-		for port, _ := range temp {
-			newDatas = append(newDatas, port)
-		}
-		probePorts = newDatas
-		sort.Ints(probePorts)
+	if err != nil {
+		return
 	}
+	defer conn.Close()
+
+	// 记录开放端口
+	address := fmt.Sprintf("%s:%d", addr.ip, addr.port)
+	result := fmt.Sprintf("[+] 端口开放 %s", address)
+	Common.LogSuccess(result)
+
+	wg.Add(1)
+	respondingHosts <- address
+}
+
+// NoPortScan 生成端口列表(不进行扫描)
+func NoPortScan(hostslist []string, ports string) []string {
+	var AliveAddress []string
+
+	// 解析并排除端口
+	probePorts := excludeNoPorts(Common.ParsePort(ports))
+
+	// 生成地址列表
 	for _, port := range probePorts {
 		for _, host := range hostslist {
-			address := host + ":" + strconv.Itoa(port)
+			address := fmt.Sprintf("%s:%d", host, port)
 			AliveAddress = append(AliveAddress, address)
 		}
 	}
-	return
+
+	return AliveAddress
+}
+
+// excludeNoPorts 排除指定的端口
+func excludeNoPorts(ports []int) []int {
+	noPorts := Common.ParsePort(Common.NoPorts)
+	if len(noPorts) == 0 {
+		return ports
+	}
+
+	// 使用map过滤端口
+	temp := make(map[int]struct{})
+	for _, port := range ports {
+		temp[port] = struct{}{}
+	}
+
+	for _, port := range noPorts {
+		delete(temp, port)
+	}
+
+	// 转换为切片并排序
+	var newPorts []int
+	for port := range temp {
+		newPorts = append(newPorts, port)
+	}
+	sort.Ints(newPorts)
+
+	return newPorts
 }