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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #include "winsock2.h"
  5. #pragma comment(lib, "ws2_32.lib")
  6.  
  7. #define  BUF_SIZE	 64
  8.  
  9. int main(int argc, char* argv[]) {
  10. 	WSADATA			wsd;			//WSADATA變數
  11. 	SOCKET			sServer;		//伺服器Socket
  12. 	SOCKET			sClient;		//客戶端Socket
  13. 	SOCKADDR_IN		addrServ;;		//伺服器地址
  14. 	char			buf[BUF_SIZE];	//接收資料緩衝區
  15. 	int				retVal;			//返回值
  16. 	int             bufNum = 0;
  17. 	//Select模式的相關變數
  18. 	FD_SET			socketSet;		//伺服器Sockets集合
  19. 	FD_SET			readSet;		//測試可讀性的Sockets集合
  20. 	FD_SET			writeSet;		//測試可寫性的Sockets集合
  21. 	bool			bSent;			//是否回傳訊息給Client的記號
  22. 	//初始化Socket動態庫
  23. 	if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) {
  24. 		cout << "WSAStartup failed!" << endl;
  25. 			system("pause");
  26. 		return 1;
  27. 	}
  28.  
  29. 	//初始化Sockets集合
  30. 	FD_ZERO(&socketSet);
  31.  
  32. 	//建立Socket
  33. 	sServer = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);	
  34. 	if(INVALID_SOCKET == sServer) {
  35. 		cout << "socket failed!" << endl;
  36. 		WSACleanup();//釋放Socket資源;
  37. 			system("pause");
  38. 		return  -1;
  39. 	}
  40. 	//將伺服器Socket加入伺服器Sockets集合
  41. 	FD_SET(sServer, &socketSet);
  42.  
  43. 	//伺服器Socket地址 
  44. 	addrServ.sin_family = AF_INET;
  45. 	addrServ.sin_port = htons(4999);
  46. 	addrServ.sin_addr.s_addr = INADDR_ANY;
  47.  
  48. 	//綁定Socket
  49. 	retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN));
  50. 	if(SOCKET_ERROR == retVal) 	{	
  51. 		cout << "bind failed!" << endl;
  52. 		closesocket(sServer);	//關閉Socket
  53. 		WSACleanup();			//釋放Socket資源;
  54. 			system("pause");
  55. 		return -1;
  56. 	}
  57.  
  58. 	//開始監聽 
  59. 	retVal = listen(sServer, 1);
  60. 	if(SOCKET_ERROR == retVal) {
  61. 		cout << "listen failed!" << endl;		
  62. 		closesocket(sServer);	//關閉Socket
  63. 		WSACleanup();			//釋放Socket資源;
  64. 			system("pause");
  65. 		return -1;
  66. 	}
  67. 	cout << "Server is listening..." << endl;
  68. 	//待續_Start
  69. 	//伺服器只管接收客戶端的連線以及問候語，所以只要判斷可讀性便可
  70. 	while (1) {
  71. 		FD_ZERO(&readSet);		//清空測試可讀性
  72. 		FD_ZERO(&writeSet);		//清空測試可寫性
  73. 		bSent = false;
  74. 		readSet = socketSet;	//將要測試可讀性的Socket加入readSet
  75. 		writeSet = socketSet;	//將要測試可讀性的Socket加入writeSet
  76. 		if (SOCKET_ERROR == select(0, &readSet, &writeSet, NULL, NULL)) {
  77. 			cout << "select() returned with error " << WSAGetLastError() << endl;
  78. 			closesocket(sServer);	//關閉Socket
  79. 			WSACleanup();			//釋放Socket資源;
  80. 				system("pause");
  81. 			return -1;
  82. 		}
  83. 		//接下來看看測試的結果
  84. 		if (FD_ISSET(sServer, &readSet)) {//伺服器Socket還在集合中嗎？
  85. 			//在，那表示有客戶端的連線進來了
  86. 			cout << "Client is connecting...";
  87. 			sClient = accept(sServer, NULL, NULL);
  88. 			if(INVALID_SOCKET == sClient) {
  89. 				cout << "accept failed!" << endl;
  90. 				closesocket(sServer);	//關閉Socket
  91. 				WSACleanup();			//釋放Socket資源;
  92. 					system("pause");
  93. 				return -1;
  94. 			}
  95. 			cout << " connected." << endl;
  96. 			//將客戶端Socket加入伺服器Sockets集合
  97. 			FD_SET(sClient, &socketSet);
  98. 				system("pause");
  99. 		}
  100. 		if (FD_ISSET(sClient, &readSet)) {//客戶端Socket還在集合中嗎？
  101. 			//接收客戶端資料
  102. 			ZeroMemory(buf, BUF_SIZE);
  103. 			retVal = recv(sClient, buf, BUF_SIZE, 0);
  104. 			if (SOCKET_ERROR == retVal) {
  105. 				cout << "recv failed!" << endl;		
  106. 				closesocket(sServer);	//關閉Socket
  107. 				closesocket(sClient);	//關閉Socket		
  108. 				WSACleanup();			//釋放Socket資源;
  109. 					system("pause");
  110. 				return -1;
  111. 			}
  112. 			if (0==retVal) break;
  113. 			cout<<"MSG Received from Client: "<<buf<<endl;
  114. 			bSent = true;
  115. 		}		
  116. 		if (FD_ISSET(sClient, &writeSet) && bSent) {//客戶端Socket還在集合中嗎？
  117. 			if (SOCKET_ERROR == retVal) {
  118. 				cout << "recv failed!" << endl;		
  119. 				closesocket(sServer);	//關閉Socket
  120. 				closesocket(sClient);	//關閉Socket		
  121. 				WSACleanup();			//釋放Socket資源;
  122. 				system("pause");
  123. 				return -1;
  124. 			}
  125. 			retVal = send(sClient, buf, strlen(buf), 0);
  126. 			if (!strcmp(buf,"bye")) break;
  127. 		}
  128. 		Sleep(100);	//休息一段時間以降低在While迴圈中CPU的使用率
  129. 	}
  130.     //待續_End
  131.  
  132. 	//退出
  133. 	closesocket(sServer);		//關閉Socket
  134. 	closesocket(sClient);		//關閉Socket
  135. 	WSACleanup();				//釋放Socket資源;
  136.  
  137. 	system("pause");
  138. 	return 0;
  139. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:4:22: fatal error: winsock2.h: No such file or directory
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/YIvrfH
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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