windows下socket开发tcp程序 简单例子

Windows下的简单tcp例子。

代码均在VC6.0下调试过。

服务器代码：

//TCP server//listen port 9102//receive string and display it//Visual C++ 6.0#include <stdio.h>#include <winsock2.h>#pragma comment(lib,"ws2_32.lib")#define BUFLEN 1024int main(){SOCKET serversoc;SOCKET clientsoc;SOCKADDR_IN serveraddr;SOCKADDR_IN clientaddr;char buf[BUFLEN];int len;    WSADATA wsa;WSAStartup(MAKEWORD(1,1),&wsa);//initial Ws2_32.dll by a processif((serversoc = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) <= 0)//create a tcp socket{printf("Create socket fail!\n");return -1;}serveraddr.sin_family = AF_INET;serveraddr.sin_port = htons(9102);serveraddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);if(bind(serversoc, (SOCKADDR *)&serveraddr, sizeof(serveraddr)) != 0){printf("Bind fail!\n");return -1;}//start listen, maximum length of the queue of pending connections is 1printf("Start listen...\n");if(listen(serversoc, 1) != 0){printf("Listen fail!\n");return -1;}len = sizeof(SOCKADDR_IN);//waiting for connectingif((clientsoc = accept(serversoc, (SOCKADDR *)&clientaddr, &len))<=0){printf("Accept fail!\n");return -1;}printf("Connected\n");while(1){//waiting for data receiveif(recv(clientsoc, buf, BUFLEN, 0) <= 0){//some error occurprintf("Close connection\n");closesocket(clientsoc);break;}printf("%s\n",buf);}WSACleanup(); //clean up Ws2_32.dll return 0;}

客户端代码：

//TCP client//client send string to server//Visual C++ 6.0#include <stdio.h>#include <winsock2.h>#pragma comment(lib,"ws2_32.lib")int main(){SOCKET soc;SOCKADDR_IN serveraddr;SOCKADDR_IN clientaddr;unsigned char buf[1024];    WSADATA wsa;WSAStartup(MAKEWORD(1,1),&wsa);//initial Ws2_32.dll by a processif((soc = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) <= 0)//create a tcp socket{printf("Create socket fail!\n");return -1;}serveraddr.sin_family = AF_INET;serveraddr.sin_port = htons(9102);serveraddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//connect to serverprintf("Try to connect...\n");if(connect(soc, (SOCKADDR *)&serveraddr, sizeof(serveraddr)) != 0){printf("Connect fail!\n");return -1;}printf("Connected\n");while(1){scanf("%s", buf);//send to serverif(send(soc, buf, strlen(buf)+1, 0)<=0){printf("Error!\n");}}WSACleanup(); //clean up Ws2_32.dll return 0;}