简单Socket编程

01

server端：

02

03	#include <WINSOCK2.H>

04	#include <stdio.h>

05	#pragma comment(lib,"ws2_32.lib")

06	void main()

07

{

08

//创建套接字

09	WORD myVersionRequest;

10	WSADATA wsaData;

11	myVersionRequest=MAKEWORD(1,1);

12

int err;

13	err=WSAStartup(myVersionRequest,&wsaData);

14

if (!err)

15

{

16	printf ( "已打开套接字/n" );

17

}

18

else

19

{

20	//进一步绑定套接字

21	printf ( "嵌套字未打开!" );

22

return ;

23

}

24	SOCKET serSocket=socket(AF_INET,SOCK_STREAM,0); //创建了可识别套接字

25

//需要绑定的参数

26	SOCKADDR_IN addr;

27	addr.sin_family=AF_INET;

28	addr.sin_addr.S_un.S_addr=htonl(INADDR_ANY); //ip地址

29	addr.sin_port=htons(6000); //绑定端口

30

31	bind(serSocket,(SOCKADDR*)&addr, sizeof (SOCKADDR)); //绑定完成

32	listen(serSocket,5); //其中第二个参数代表能够接收的最多的连接数

33

34	//////////////////////////////////////////////////////////////////////////

35

//开始进行监听

36	//////////////////////////////////////////////////////////////////////////

37	SOCKADDR_IN clientsocket;

38	int len= sizeof (SOCKADDR);

39

while (1)

40

{

41	SOCKET serConn=accept(serSocket,(SOCKADDR*)&clientsocket,&len); //如果这里不是accept而是conection的话。。就会不断的监听

42	char sendBuf[100];

43

44	sprintf (sendBuf, "welcome %s to bejing" ,inet_ntoa(clientsocket.sin_addr)); //找对对应的IP并且将这行字打印到那里

45	send(serConn,sendBuf, strlen (sendBuf)+1,0);

46	char receiveBuf[100]; //接收

47	recv(serConn,receiveBuf, strlen (receiveBuf)+1,0);

48	printf ( "%s/n" ,receiveBuf);

49	closesocket(serConn); //关闭

50	WSACleanup(); //释放资源的操作

51

}

52

}

53

54

55

56

client端：

57

58

59	#include <WINSOCK2.H>

60	#include <stdio.h>

61	#pragma comment(lib,"ws2_32.lib")

62	void main()

63

{

64

int err;

65	WORD versionRequired;

66	WSADATA wsaData;

67	versionRequired=MAKEWORD(1,1);

68	err=WSAStartup(versionRequired,&wsaData); //协议库的版本信息

69

if (!err)

70

{

71	printf ( "客户端嵌套字已经打开!/n" );

72

}

73

else

74

{

75	printf ( "客户端的嵌套字打开失败!/n" );

76	return ; //结束

77

}

78	SOCKET clientSocket=socket(AF_INET,SOCK_STREAM,0);

79	SOCKADDR_IN clientsock_in;

80	clientsock_in.sin_addr.S_un.S_addr=inet_addr( "127.0.0.1" );

81	clientsock_in.sin_family=AF_INET;

82	clientsock_in.sin_port=htons(6000);

83	//bind(clientSocket,(SOCKADDR*)&clientsock_in,strlen(SOCKADDR));//注意第三个参数

84	//listen(clientSocket,5);

85	connect(clientSocket,(SOCKADDR*)&clientsock_in, sizeof (SOCKADDR)); //开始连接

86	char receiveBuf[100];

87	recv(clientSocket,receiveBuf,101,0);

88	printf ( "%s/n" ,receiveBuf);

89	send(clientSocket, "hello,this is client" , strlen ( "hello,this is client" )+1,0);

90	closesocket(clientSocket);

91	WSACleanup();

92

}