This book is intended for "hands-on" developers or advanced students interested in understanding the strategies and tactics of concurrent network programming using C++ and object-oriented design. We describe the key design dimensions, patterns, and principles needed to develop flexible and efficient concurrent networked applications quickly and easily. Our numerous C++ code examples reinforce the design concepts and illustrate concretely how to use the core classes in ACE right away. We also take you "behind the scenes" to understand how and why the IPC and concurrency mechanisms in the ACE toolkit are designed the way they are. This material will help to enhance your design skills and to apply C++ and patterns more effectively in your own object-oriented networked applications.
一個簡單的端口掃描程序：
addstr = "發現端口" & Str(port) & "打開" & Space(5) Select Case port Case 7 plus = "ECHO服務" Case 21 plus = "FTP服務★★★★★" Case 25 plus = "SMTP服務★★" Case 43 plus = "Whois服務" Case 53 plus = "DNS服務☆" Case 80 plus = "HTTP服務★★★★★" Case 81 plus = "HOSTS2名稱服務" Case 99 plus = "NCX99后門★★★★★" Case 110 plus = "POP3服務★★★★★" Case 111 plus = "Sun RPC服務★★" Case 135 plus = "本地服務" Case 137 plus = "NETBIOS 名稱服務/流影POP" Case 138 plus = "NETBIOS 數據存儲服務" Case 139 plus = "NETBIOS 會議服務★★★" Case 119 plus = "NNTP虛擬服務" Case 163 plus = "SNMP服務" Case 443 plus = "https服務" Case 512 plus = "遠程執行服務" Case 513 plus = "login, remote login" Case 514 plus = "cmd, exec with auto auth." Case 600 plus = "Sun IPC服務器" Case 1080 plus = "SOCKS代理服務★★★" Case 1433 plus = "SQL服務器★★★" Case 3128 plus = "HTTP代理服務" Case 7626 plus = "木馬冰河★★★★★" Case 8080 plus = "HTTP代理服務" Case Else plus = "未知服務!"
