TCP编程

/* * Author: Leng_que * Date: 2009年11月14日 * E-mail: [e-mail] * Description: 服务端 —— TCP编程 */#include <stdio.h>#include <winsock2.h>#pragma comment(lib, "ws2_32.lib")int main(void){char buf[32]={0};WSADATA wsa={0};SOCKET s=0;struct sockaddr_in s_ip={0};s_ip.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");s_ip.sin_family = AF_INET;s_ip.sin_port = htons(8888);struct sockaddr_in client_addr={0};int addrlen = sizeof(struct sockaddr);SOCKET client_s=0;//socket接收超时设置int nTimeout = 3000;int ret = WSAStartup(MAKEWORD(2,0), &wsa);if ( !ret ){s = socket(AF_INET, SOCK_STREAM, 0);if ( s != INVALID_SOCKET ){setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (const char*)&nTimeout, sizeof(nTimeout));if ( !bind(s, (const sockaddr*)&s_ip, sizeof(struct sockaddr)) ){if ( !listen(s, 8) ){printf("正在监听本机8888端口……/r/n");while(true){client_s = accept(s, (struct sockaddr*)&client_addr, &addrlen);if ( client_s != INVALID_SOCKET ){printf("成功接受来自%s的连接。/r/n/r/n", inet_ntoa(client_addr.sin_addr));int len=0;strcpy(buf, "我是服务器端");len = send(client_s, (const char*)&buf, strlen(buf), 0);printf("共发出%dbyte的数据包，内容为：%s/r/n", len,buf);memset(buf, 0, sizeof(buf));len = recv(client_s, buf, sizeof(buf), 0);printf("接收到%dbyte的数据包，内容为：%s/r/n", len,buf);break;}else{break;}}}}}}if ( client_s!=NULL ){closesocket(client_s);}if ( s!=NULL ){closesocket(s);}if ( !ret ){WSACleanup();}return 0;}  /* * Author: Leng_que * Date: 2009年11月14日 * E-mail: [e-mail] * Description: 客户端 —— TCP编程 */#include <stdio.h>#include <winsock2.h>#pragma comment(lib, "ws2_32.lib")int main(void){char buf[32]={0};WSADATA wsa={0};SOCKET s=0;struct sockaddr_in s_ip={0};s_ip.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");s_ip.sin_family = AF_INET;s_ip.sin_port = htons(8888);//socket接收超时设置int nTimeout = 3000;int ret = WSAStartup(MAKEWORD(2,0), &wsa);if ( !ret ){s = socket(AF_INET, SOCK_STREAM, 0);if ( s != INVALID_SOCKET ){setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (const char*)&nTimeout, sizeof(nTimeout));printf("正在连接服务端……/r/n");if ( !connect(s, (struct sockaddr *)&s_ip, sizeof(struct sockaddr)) ){int len=0;printf("/r/n");memset(buf, 0, sizeof(buf));len = recv(s, buf, sizeof(buf), 0);printf("接收到%dbyte的数据包，内容为：%s/r/n", len,buf);strcpy(buf, "我是客户端");len = send(s, buf, strlen(buf), 0);printf("共发出%dbyte的数据包，内容为：%s/r/n", len,buf);}else{printf("连接超时！");}}}if ( s!=NULL ){closesocket(s);}if ( !ret ){WSACleanup();}return 0;}