实现Ping和TCP端口扫描功能

internal/scan/tcp.go

@@ -0,0 +1,17 @@
+package scan
+
+import (
+	"net"
+	"strconv"
+	"time"
+)
+
+func TCPProbe(ip string, port int, timeout time.Duration) bool {
+	addr := net.JoinHostPort(ip, strconv.Itoa(port))
+	conn, err := net.DialTimeout("tcp", addr, timeout)
+	if err != nil {
+		return false
+	}
+	conn.Close()
+	return true
+}